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1 | This document details the changes between this version, bash-5.2-release, and |
2 | the previous version, bash-5.2-rc4. | |
3 | ||
4 | 1. Changes to Bash | |
5 | ||
6 | 2. Changes to Readline | |
7 | ||
8 | a. When replacing a history entry, make sure the existing entry has a non-NULL | |
9 | timestamp before copying it; it may have been added by the application, not | |
10 | the history library. | |
11 | ||
12 | 3. New Features in Bash | |
13 | ||
14 | 4. New Features in Readline | |
15 | ||
16 | ------------------------------------------------------------------------------ | |
17 | This document details the changes between this version, bash-5.2-rc4, and | |
18 | the previous version, bash-5.2-rc3. | |
19 | ||
20 | 1. Changes to Bash | |
21 | ||
22 | a. Changed how the compatibility mode enabling of extglob works in conjunction | |
23 | with parsing conditional commands. | |
24 | ||
25 | b. Fixed a problem with aliases containing command substitutions. | |
26 | ||
27 | 2. Changes to Readline | |
28 | ||
29 | 3. New Features in Bash | |
30 | ||
31 | 4. New Features in Readline | |
32 | ||
33 | ------------------------------------------------------------------------------ | |
34 | This document details the changes between this version, bash-5.2-rc3, and | |
35 | the previous version, bash-5.2-rc2. | |
36 | ||
37 | 1. Changes to Bash | |
38 | ||
39 | a. Added a compatibility mode feature that causes the parser to parse command | |
40 | substitutions as if extglob were enabled. If it is enabled before execution, | |
41 | parse at execution will succeed. If not, the subsequent execution parse will | |
42 | fail. | |
43 | ||
44 | b. Fixed an issue with handling a `return' executed in a trap action if the | |
45 | trap is executed while running in a shell function. | |
46 | ||
47 | 2. Changes to Readline | |
48 | ||
49 | 3. New Features in Bash | |
50 | ||
51 | 4. New Features in Readline | |
52 | ||
53 | a. Readline now checks for changes to locale settings (LC_ALL/LC_CTYPE/LANG) | |
54 | each time it is called, and modifies the appropriate locale-specific display | |
55 | and key binding variables when the locale changes. | |
56 | ||
57 | ------------------------------------------------------------------------------ | |
58 | This document details the changes between this version, bash-5.2-rc2, and | |
59 | the previous version, bash-5.2-rc1. | |
60 | ||
61 | 1. Changes to Bash | |
62 | ||
63 | a. Fixed a bug that could disable history saving after a compound array | |
64 | assignment in an interactive shell. | |
65 | ||
66 | b. Fixed a bug that could cause incorrect error messages when running a DEBUG | |
67 | trap during a conditional or arithmetic command. | |
68 | ||
69 | c. Fixed a bug that caused test to print an error message when given ! ! arg | |
70 | as arguments. | |
71 | ||
72 | d. Fixed a bug that resulted in incorrect error messages when completing a | |
73 | backquoted command substitution. | |
74 | ||
75 | e. Changed command substitution parsing to reproduce the original text more | |
76 | closely when reconsituting the command string from the parsed command. | |
77 | ||
78 | f. Fixed a bug that could cause an EXIT trap to use the wrong variable context | |
79 | when the errexit option is set. | |
80 | ||
81 | g. Fixed a bug that could cause the parser to incorrectly delimit a token when | |
82 | an alias expansion ended with a multibyte character. | |
83 | ||
84 | 2. Changes to Readline | |
85 | ||
86 | 3. New Features in Bash | |
87 | ||
88 | a. Since there is no `declare -' equivalent of `local -', make sure to use | |
89 | `local -' in the output of `local -p'. | |
90 | ||
91 | b. Null anchored matches in pattern substitution now process `&' in the | |
92 | replacement string, like sed. | |
93 | ||
94 | 4. New Features in Readline | |
95 | ||
96 | ------------------------------------------------------------------------------ | |
97 | This document details the changes between this version, bash-5.2-rc1, and | |
98 | the previous version, bash-5.2-beta. | |
99 | ||
100 | 1. Changes to Bash | |
101 | ||
102 | a. Changes to `wait -p' and how it sets the variable name in the presence of | |
103 | valid and invalid PID arguments. | |
104 | ||
105 | b. Fixed a bug that caused compgen to dump core if the completion engine was | |
106 | not initialized. | |
107 | ||
108 | c. Fixed a memory leak in the variable name programmable completion code. | |
109 | ||
110 | d. Here-documents and here-strings use tempfiles if the shell compatibility | |
111 | level is 50 or lower. | |
112 | ||
113 | e. Non-interactive shells exit on a syntax error encountered while parsing a | |
114 | command substitution. | |
115 | ||
116 | f. Fixed a bug with inherited parser state while parsing a command substitution. | |
117 | ||
118 | g. Fixed a bug that caused the shell not to check for terminating signals | |
119 | after executing the command_string supplied with `-c' and before executing | |
120 | the exit trap. | |
121 | ||
122 | h. Changes to avoid a make race condition while generating builtins.c. | |
123 | ||
124 | i. Make it explicit that BASH_REMATCH is always a global variable, and that | |
125 | local copies are (currently) ignored. | |
126 | ||
127 | j. Fixed a bug that caused an ambiguous redirection (>&word) to be printed | |
128 | incorrectly (>&word) if no file descriptor was supplied. | |
129 | ||
130 | 2. Changes to Readline | |
131 | ||
132 | a. Fixed a bug that caused rl_eof_found to be set prematurely while reading a | |
133 | multi-character key sequence in callback mode. | |
134 | ||
135 | 3. New Features in Bash | |
136 | ||
137 | a. In posix mode, the `printf' builtin checks for the `L' length modifier and | |
138 | uses long double for floating point conversion specifiers if it's present, | |
139 | double otherwise. | |
140 | ||
141 | b. The `globbing' completion code now takes the `globstar' option into account. | |
142 | ||
143 | c. `suspend -f' now forces the shell to suspend even if job control is not | |
144 | currently enabled. | |
145 | ||
146 | 4. New Features in Readline | |
147 | ||
148 | ------------------------------------------------------------------------------ | |
149 | This document details the changes between this version, bash-5.2-beta, and | |
150 | the previous version, bash-5.2-alpha. | |
151 | ||
152 | 1. Changes to Bash | |
153 | ||
154 | a. Fixed a problem with command-oriented history and multi-line commands that | |
155 | caused embedded blank lines to be run together. | |
156 | ||
157 | b. Changed the way `&' is quoted when performing pattern substitution and | |
158 | `patsub_replacement' is enabled. | |
159 | ||
160 | c. Fixed some integer overflows when expanding strings or reading the output | |
161 | of command substitution larger than 2GB. | |
162 | ||
163 | d. `wait -p' without the `-n' option now does something useful if there are no | |
164 | jobs. | |
165 | ||
166 | e. Fixed an issue with read timeouts in posix mode. | |
167 | ||
168 | f. Changed here-document processing to process $'...' and $"..." only when they | |
169 | appear in the WORD portion of ${PARAM OP WORD} in the here-document body | |
170 | and the body is being expanded. | |
171 | ||
172 | g. Changed alias expansion in command substitution to be posix-conformant | |
173 | (performed while initially parsing the command substitution) when in posix | |
174 | mode. | |
175 | ||
176 | h. Bash optimizes away more forks in subshells. | |
177 | ||
178 | i. Here-document construction now performs quote removal on the here-document | |
179 | delimiter only if it's marked as quoted, which prevents quote characters in | |
180 | command substitutions from being removed. | |
181 | ||
182 | j. Prompt string expansion now gives invisible characters in the expansion of | |
183 | the \w, \W, and \s escape sequences a visible representation to avoid | |
184 | problems with redisplay. | |
185 | ||
186 | k. Fixed a problem with SIGINT during the execution of a command bound with | |
187 | `bind -x' affecting the saved terminal settings. | |
188 | ||
189 | l. Fixed an inconsistency with how $@ expands in a construct like ${@:+set} | |
190 | or ${array[@]:+set} in the presence of null positional parameters or | |
191 | array elements. | |
192 | ||
193 | 2. Changes to Readline | |
194 | ||
195 | a. Prevent some display problems when running a command as the result of a | |
196 | trap or one bound using `bind -x' and the command generates output. | |
197 | ||
198 | b. Fixed an issue with multi-line prompt strings that have one or more | |
199 | invisible characters at the end of a physical line. | |
200 | ||
201 | c. Fixed an issue that caused a history line's undo list to be cleared when | |
202 | it should not have been. | |
203 | ||
204 | 3. New Features in Bash | |
205 | ||
206 | a. There is a new bindable readline command name: `vi-edit-and-execute-command'. | |
207 | ||
208 | 4. New Features in Readline | |
209 | ||
210 | a. Two new bindable string variables: active-region-start-color and | |
211 | active-region-end-color. The first sets the color used to display the | |
212 | active region; the second turns it off. If set, these are used in place | |
213 | of terminal standout mode. | |
214 | ||
215 | b. New readline state (RL_STATE_EOF) and application-visible variable | |
216 | (rl_eof_found) to allow applications to detect when readline reads EOF | |
217 | before calling the deprep-terminal hook. | |
218 | ||
219 | c. There is a new configuration option: --with-shared-termcap-library, which | |
220 | forces linking the shared readline library with the shared termcap (or | |
221 | curses/ncurses/termlib) library so applications don't have to do it. | |
222 | ||
223 | ------------------------------------------------------------------------------ | |
224 | This document details the changes between this version, bash-5.2-alpha, and | |
225 | the previous version, bash-5.1-release. | |
226 | ||
227 | 1. Changes to Bash | |
228 | ||
229 | a. Fixed a bug that assigned a value to the variable name supplied as an | |
230 | argument to `wait -p' when there were no jobs. | |
231 | ||
232 | b. Fixed a bug that resulted in performing incorrect word expansion on the | |
233 | key/value pairs in a compound array assignment. | |
234 | ||
235 | c. Fixed a bug that could put the child forked to run a command substitution | |
236 | into the wrong process group. | |
237 | ||
238 | d. Fixed a problem that could cause the lastpipe option to work incorrectly if | |
239 | file descriptor 0 was closed. | |
240 | ||
241 | e. Bash tries to suppress traps if a forked child receives a trapped signal | |
242 | before it has a chance to reset its signal handlers. | |
243 | ||
244 | f. Fixed several memory leaks in compound array assignments. | |
245 | ||
246 | g. Fixed a problem with performing an assignment with `+=' to an array element | |
247 | that was the value of a nameref. | |
248 | ||
249 | h. Fixed a bug that could cause a nameref containing an array reference using | |
250 | `@' or `*' not to expand to multiple words. | |
251 | ||
252 | i. Fixed a bug where extended glob functions could match `.' or `..' when it | |
253 | wasn't explicitly specified, even if dotglob was set. | |
254 | ||
255 | j. Fixed a bug that caused non-interactive posix-mode shells not to exit on a | |
256 | variable assignment error while assigning into the temporary environment. | |
257 | ||
258 | k. Fixed a bug that caused parsing errors if an alias contained a compound | |
259 | array assignment. | |
260 | ||
261 | l. Fixed a couple of instances where bash checked syntax too aggressively when | |
262 | trying to determine how to add a partial command to command-oriented | |
263 | history. | |
264 | ||
265 | m. Fixed a parser problem that caused it not to allow reserved words to follow | |
266 | the `((' and `[[' commands. | |
267 | ||
268 | n. Fixed a bad offset calculation when using negative offsets to `history -d'. | |
269 | ||
270 | o. Fixed an off-by-one error that caused a read past the end of a buffer when | |
271 | reading a multibyte character from the output of a command substitution. | |
272 | ||
273 | p. Fixed a problem with a failed `exec' command not setting $? to the right | |
274 | value for an exit trap. | |
275 | ||
276 | q. Fixed a problem that caused bash not to unlink FIFOs created as part of | |
277 | expanding redirections for an external command. | |
278 | ||
279 | r. Fixed a bug that could cause aliases not to be expanded in case statements. | |
280 | ||
281 | s. Fixed a bug that could cause word completion to attempt programmable | |
282 | completion for the target of a redirection, instead of filename completion. | |
283 | ||
284 | t. Fixed a bug that could result in errors after rebinding a key sequence with | |
285 | `bind -x' multiple times. | |
286 | ||
287 | u. Fixed a problem that could result in not quoting the result when performing | |
288 | command name completion with a glob pattern in the command name. | |
289 | ||
290 | v. `mapfile' now uses fully-buffered reads in more cases, which should improve | |
291 | bulk read performance. | |
292 | ||
293 | w. Fixed a bug that caused `wait -n' to not reset its internal state when | |
294 | interrupted by a signal, resulting in subsequent calls failing. | |
295 | ||
296 | x. Fixed a bug with parsing numeric arguments to readline key sequences | |
297 | installed with `bind -x'. | |
298 | ||
299 | y. Bash suppresses forking in several additional cases, including most uses | |
300 | of $(<file). | |
301 | ||
302 | z. If there are multiple `!' tokens in a [[ command, toggle the invert state | |
303 | instead of setting it unconditionally. | |
304 | ||
305 | aa. Fixed a bug where running `fc' on an empty history list would cause the | |
306 | shell to crash. | |
307 | ||
308 | bb. Word completion now checks whether or not a quote character closes a | |
309 | quoted string begun on a previous line, so readline doesn't interpret the | |
310 | quote as starting a new quoted string. | |
311 | ||
312 | cc. Fixed a typo that translated \UNNNNNNNN characters that were not valid in | |
313 | the current locale encoding as \uNNNNNNNN. | |
314 | ||
315 | dd. Fixed an issue that could cause bash to print timing statistics for the | |
316 | wrong command when `set -e' causes a command to fail. | |
317 | ||
318 | ee. Bash now runs the exit trap in function context if a failed command in | |
319 | the function causes the shell to exit. | |
320 | ||
321 | ff. Some fixes to how subshells modify $SHLVL. | |
322 | ||
323 | gg. Fixed a bug that caused `mapfile -t' not to remove the delimiter when the | |
324 | delimiter is > 128 in the current encoding. | |
325 | ||
326 | hh. Fixed a problem that could cause the shell to attempt to free unallocated | |
327 | memory if an expansion error occurred. | |
328 | ||
329 | ii. Fixed a bug in the bash malloc implementation of malloc_usable_size. Bash | |
330 | did not use it, but it could cause problems with library functions that | |
331 | did. | |
332 | ||
333 | jj. If the `exec' builtin fails, and the shell does not exit, it restores | |
334 | trapped signals to their trapped state. | |
335 | ||
336 | kk. Fixed a bug that could cause variable assignment arguments to `declare' to | |
337 | expand variables using attributes that the call to declare was turning off. | |
338 | ||
339 | ll. Fixed a bug with LINENO and arithmetic for commands. | |
340 | ||
341 | mm. Fixed a posix-mode bug that caused tildes not to be expanded after an | |
342 | unquoted colon on the right side of an assignment statement. | |
343 | ||
344 | nn. Fixed a problem with `caller' and line numbers when executing an ERR trap. | |
345 | ||
346 | oo. Fixed a problem that could make the value returned by ${a:=b} not be the | |
347 | final value assigned to a (e.g., if `a' has an attribute that modifies | |
348 | the value on assignment). | |
349 | ||
350 | pp. Fixed a problem with saving multi-line here-documents to the history list | |
351 | where the here-document delimiter does not appear on the first line. | |
352 | ||
353 | qq. Fixed a bug with using += to assign to dynamic variables like RANDOM. | |
354 | ||
355 | rr. Fixed a bug that caused `set -n' to modify $? if set after execution had | |
356 | started. | |
357 | ||
358 | ss. Builtins like printf/read/wait now behave more consistently when assigning | |
359 | arbitrary keys to associative arrays (like `]'. when appropriately quoted). | |
360 | ||
361 | tt. Fixed a problem with here-document collection printing the wrong prompt | |
362 | when parsing a compound list in an interactive shell. | |
363 | ||
364 | uu. Fixed a problem with quoting shell expansion characters (like `$') when | |
365 | they appear in a tab-completed word along with characters that do need | |
366 | quoting (e.g.. $HOME/VirtualBox VMs). | |
367 | ||
368 | 2. Changes to Readline | |
369 | ||
370 | a. Fixed a problem with cleaning up active marks when using callback mode. | |
371 | ||
372 | b. Fixed a problem with arithmetic comparison operators checking the version. | |
373 | ||
374 | c. Fixed a problem that could cause readline not to build on systems without | |
375 | POSIX signal functions. | |
376 | ||
377 | d. Fixed a bug that could cause readline to crash if the application removed | |
378 | the callback line handler before readline read all typeahead. | |
379 | ||
380 | e. Added additional checks for read errors in the middle of readline commands. | |
381 | ||
382 | f. Fixed a redisplay problem that occurred when switching from the digit- | |
383 | argument prompt `(arg: N)' back to the regular prompt and the regular | |
384 | prompt contained invisible characters. | |
385 | ||
386 | g. Fixed a problem with restoring the prompt when aborting an incremental | |
387 | search. | |
388 | ||
389 | h. Fix a problem with characters > 128 not being displayed correctly in certain | |
390 | single-byte encodings. | |
391 | ||
392 | i. Fixed a problem with unix-filename-rubout that caused it to delete too much | |
393 | when applied to a pathname consisting only of one or more slashes. | |
394 | ||
395 | j. Fixed a display problem that caused the prompt to be wrapped incorrectly if | |
396 | the screen changed dimensions during a call to readline() and the prompt | |
397 | became longer than the screen width. | |
398 | ||
399 | k. Fixed a problem that caused the \r output by turning off bracketed paste | |
400 | to overwrite the line if terminal echo was disabled. | |
401 | ||
402 | l. Fixed a bug that could cause colored-completion-prefix to not display if | |
403 | completion-prefix-display-length was set. | |
404 | ||
405 | m. Fixed a problem with line wrapping prompts when a group of invisible | |
406 | characters runs to the right edge of the screen and the prompt extends | |
407 | longer then the screen width. | |
408 | ||
409 | n. Fixed a couple problems that could cause rl_end to be set incorrectly by | |
410 | transpose-words. | |
411 | ||
412 | 3. New Features in Bash | |
413 | ||
414 | a. The bash malloc returns memory that is aligned on 16-byte boundaries. | |
415 | ||
416 | b. There is a new internal timer framework used for read builtin timeouts. | |
417 | ||
418 | c. Rewrote the command substitution parsing code to call the parser recursively | |
419 | and rebuild the command string from the parsed command. This allows better | |
420 | syntax checking and catches errors much earlier. Along with this, if | |
421 | command substitution parsing completes with here-documents remaining to be | |
422 | read, the shell prints a warning message and reads the here-document bodies | |
423 | from the current input stream. | |
424 | ||
425 | d. The `ulimit' builtin now treats an operand remaining after all of the options | |
426 | and arguments are parsed as an argument to the last command specified by | |
427 | an option. This is for POSIX compatibility. | |
428 | ||
429 | e. Here-document parsing now handles $'...' and $"..." quoting when reading the | |
430 | here-document body. | |
431 | ||
432 | f. The `shell-expand-line' and `history-and-alias-expand-line' bindable readline | |
433 | commands now understand $'...' and $"..." quoting. | |
434 | ||
435 | g. There is a new `spell-correct-word' bindable readline command to perform | |
436 | spelling correction on the current word. | |
437 | ||
438 | h. The `unset' builtin now attempts to treat arguments as array subscripts | |
439 | without parsing or expanding the subscript, even when `assoc_expand_once' | |
440 | is not set. | |
441 | ||
442 | i. There is a default value for $BASH_LOADABLES_PATH in config-top.h. | |
443 | ||
444 | j. Associative array assignment and certain instances of referencing (e.g., | |
445 | `test -v') now allow `@' and `*' to be used as keys. | |
446 | ||
447 | k. Bash attempts to expand indexed and associative array subscripts only | |
448 | once when executing shell constructs and word expansions. | |
449 | ||
450 | l. The `unset' builtin allows a subscript of `@' or `*' to unset a key with | |
451 | that value for associative arrays instead of unsetting the entire array | |
452 | (which you can still do with `unset arrayname'). For indexed arrays, it | |
453 | removes all elements of the array without unsetting it (like `A=()'). | |
454 | ||
455 | m. Additional builtins (printf/test/read/wait) do a better job of not | |
456 | parsing array subscripts if array_expand_once is set. | |
457 | ||
458 | n. New READLINE_ARGUMENT variable set to numeric argument for readline commands | |
459 | defined using `bind -x'. | |
460 | ||
461 | o. The new `varredir_close' shell option causes bash to automatically close | |
462 | file descriptors opened with {var}<fn and other styles of varassign | |
463 | redirection unless they're arguments to the `exec' builtin. | |
464 | ||
465 | p. The `$0' special parameter is now set to the name of the script when running | |
466 | any (non-interactive) startup files such as $BASH_ENV. | |
467 | ||
468 | q. The `enable' builtin tries to load a loadable builtin using the default | |
469 | search path if `enable name' (without any options) attempts to enable a | |
470 | non-existent builtin. | |
471 | ||
472 | r. The `printf' builtin has a new format specifier: %Q. This acts like %q but | |
473 | applies any specified precision to the original unquoted argument, then | |
474 | quotes and outputs the result. | |
475 | ||
476 | s. The new `noexpand_translations' option controls whether or not the translated | |
477 | output of $"..." is single-quoted. | |
478 | ||
479 | t. There is a new parameter transformation operator: @k. This is like @K, but | |
480 | expands the result to separate words after word splitting. | |
481 | ||
482 | u. There is an alternate array implementation, selectable at `configure' time, | |
483 | that optimizes access speed over memory use (use the new configure | |
484 | --enable-alt-array-implementation option). | |
485 | ||
486 | v. If an [N]<&WORD- or [N]>&WORD- redirection has WORD expand to the empty | |
487 | string, treat the redirection as [N]<&- or [N]>&- and close file descriptor | |
488 | N (default 0). | |
489 | ||
490 | w. Invalid parameter transformation operators are now invalid word expansions, | |
491 | and so cause fatal errors in non-interactive shells. | |
492 | ||
493 | x. New shell option: patsub_replacement. When enabled, a `&' in the replacement | |
494 | string of the pattern substitution expansion is replaced by the portion of | |
495 | the string that matched the pattern. Backslash will escape the `&' and | |
496 | insert a literal `&'. | |
497 | ||
498 | y. `command -p' no longer looks in the hash table for the specified command. | |
499 | ||
500 | z. The new `--enable-translatable-strings' option to `configure' allows $"..." | |
501 | support to be compiled in or out. | |
502 | ||
503 | aa. The new `globskipdots' shell option forces pathname expansion never to | |
504 | return `.' or `..' unless explicitly matched. It is enabled by default. | |
505 | ||
506 | bb. Array references using `@' and `*' that are the value of nameref variables | |
507 | (declare -n ref='v[@]' ; echo $ref) no longer cause the shell to exit if | |
508 | set -u is enabled and the array (v) is unset. | |
509 | ||
510 | 4. New Features in Readline | |
511 | ||
512 | a. There is now an HS_HISTORY_VERSION containing the version number of the | |
513 | history library for applications to use. | |
514 | ||
515 | b. History expansion better understands multiple history expansions that may | |
516 | contain strings that would ordinarily inhibit history expansion (e.g., | |
517 | `abc!$!$'). | |
518 | ||
519 | c. There is a new framework for readline timeouts, including new public | |
520 | functions to set timeouts and query how much time is remaining before a | |
521 | timeout hits, and a hook function that can trigger when readline times | |
522 | out. There is a new state value to indicate a timeout. | |
523 | ||
524 | d. Automatically bind termcap key sequences for page-up and page-down to | |
525 | history-search-backward and history-search-forward, respectively. | |
526 | ||
527 | e. There is a new `fetch-history' bindable command that retrieves the history | |
528 | entry corresponding to its numeric argument. Negative arguments count back | |
529 | from the end of the history. | |
530 | ||
531 | f. `vi-undo' is now a bindable command. | |
532 | ||
533 | g. There is a new option: `enable-active-region'. This separates control of | |
534 | the active region and bracketed-paste. It has the same default value as | |
535 | bracketed-paste, and enabling bracketed paste enables the active region. | |
536 | Users can now turn off the active region while leaving bracketed paste | |
537 | enabled. | |
538 | ||
539 | h. rl_completer_word_break_characters is now `const char *' like | |
540 | rl_basic_word_break_characters. | |
541 | ||
542 | i. Readline looks in $LS_COLORS for a custom filename extension | |
543 | (*.readline-colored-completion-prefix) and uses that as the default color | |
544 | for the common prefix displayed when `colored-completion-prefix' is set. | |
545 | ||
546 | ------------------------------------------------------------------------------ | |
8868edaf CR |
547 | This document details the changes between this version, bash-5.1-rc3, and |
548 | the previous version, bash-5.1-rc2. | |
549 | ||
550 | 1. Changes to Bash | |
551 | ||
552 | a. The `assoc_expand_once' option now affects the evaluation of the -v primary | |
553 | to test and the [[ compound command. | |
554 | ||
555 | 2. Changes to Readline | |
556 | ||
557 | a. Fixed a bug that could cause point to be set beyond the end of the line | |
558 | buffer when aborting an incremental search. | |
559 | ||
560 | 3. New Features in Bash | |
561 | ||
562 | 4. New Features in Readline | |
563 | ||
564 | ------------------------------------------------------------------------------ | |
565 | This document details the changes between this version, bash-5.1-rc2, and | |
566 | the previous version, bash-5.1-rc1. | |
567 | ||
568 | 1. Changes to Bash | |
569 | ||
570 | a. Process substitutions started from an interactive shell no longer have their | |
571 | standard input implicitly redirected from /dev/null. | |
572 | ||
573 | b. Fixed an issue with setting the SIGINT trap handler in an interactive shell | |
574 | when temporarily running $PROMPT_COMMAND non-interactively. | |
575 | ||
576 | 2. Changes to Readline | |
577 | ||
578 | a. Terminals that are named "dumb" or unknown do not enable bracketed paste | |
579 | by default. | |
580 | ||
581 | b. Ensure that disabling bracketed paste turns off highlighting the incremental | |
582 | search string when the search is successful. | |
583 | ||
584 | 3. New Features in Bash | |
585 | ||
586 | 4. New Features in Readline | |
587 | ||
588 | ------------------------------------------------------------------------------ | |
589 | This document details the changes between this version, bash-5.1-rc1, and | |
590 | the previous version, bash-5.1-beta. | |
591 | ||
592 | 1. Changes to Bash | |
593 | ||
594 | a. Fixed an inconsistency in the way HISTCMD is calculated when it's expanded | |
595 | during a multi-line command. | |
596 | ||
597 | b. Modified the change to here-document expansion containing backslash-quoted | |
598 | double quotes. | |
599 | ||
600 | c. Fixed a case where the shells's exit status could be greater than 255. | |
601 | ||
602 | d. Modified changed to process substitution so the executed command has its | |
603 | stdin redirected from /dev/null if it was previously interactive and | |
604 | reading commands from the terminal. | |
605 | ||
606 | 2. New Features in Bash | |
607 | ||
608 | a. There is a new contributed loadable builtin: asort. | |
609 | ||
610 | 3. Changes to Readline | |
611 | ||
612 | a. Fixed a bug that could cause an application with an application-specific | |
613 | redisplay function to crash if the line data structures had not been | |
614 | initialized. | |
615 | ||
616 | 4. New Features in Readline | |
617 | ||
618 | ------------------------------------------------------------------------------ | |
619 | This document details the changes between this version, bash-5.1-beta, and | |
620 | the previous version, bash-5.1-alpha. | |
621 | ||
622 | 1. Changes to Bash | |
623 | ||
624 | a. Fixed a bug that caused name references to variables to not update the | |
625 | referenced variable's assignment side effects. | |
626 | ||
627 | b. Tightened up the parameter transformation error checking for invalid | |
628 | transformation operators. | |
629 | ||
630 | c. System-specific changes for: FreeBSD | |
631 | ||
632 | d. A few minor changes to move potential uses of stdio functions out of signal | |
633 | handling paths. | |
634 | ||
635 | e. Make sure SIGCHLD is blocked in all cases where waitchld() is not called | |
636 | from a signal handler. | |
637 | ||
638 | f. Changed `command' builtin processing so it no longer starts an extra process | |
639 | when run asynchronously (command x &). | |
640 | ||
641 | g. Avoid performing tilde expansion after `:' in words that look like assignment | |
642 | statements when in posix mode. | |
643 | ||
644 | h. Slight changes to how the `complete' builtin prints out options and actions | |
645 | for completion specifications. | |
646 | ||
647 | i. Several changes to how `local -' restores the values of options and | |
648 | $SHELLOPTS. | |
649 | ||
650 | j. Don't treat a word in a compound assignment as an assignment statement | |
651 | unless it has a valid subscript before the `='. | |
652 | ||
653 | k. Fixed a bug with the DEBUG trap and process substitution that caused the | |
654 | terminal's process group to be set incorrectly. | |
655 | ||
656 | l. Fixed a bug that left readline's signal handlers installed while running a | |
657 | shell command from a bindable readline command. | |
658 | ||
659 | m. Fixed the `fc' builtin to clamp out of range history specifications at the | |
660 | boundaries of the history list for POSIX conformance. | |
661 | ||
662 | n. Fixed a bug that caused ${foo@a} to treat foo as an unset variable if it | |
663 | was an array without a value for subscript 0/"0" but had other set | |
664 | elements. | |
665 | ||
666 | o. Fixed a bug that caused the history code to attempt to parse command | |
667 | substitutions looking for shell comments before adding them to the history, | |
668 | even while parsing here-documents. | |
669 | ||
670 | p. Fixed a bug that could cause a syntax error in a command read by `eval' to | |
671 | exit an interactive shell. | |
672 | ||
673 | 2. New Features in Bash | |
674 | ||
675 | a. If the hash builtin is listing hashed filenames portably, don't print | |
676 | anything if the table is empty. | |
677 | ||
678 | b. GLOBIGNORE now ignores `.' and `..' as a terminal pathname component. | |
679 | ||
680 | c. Bash attempts to optimize away forks in the last command in a function body | |
681 | under appropriate circumstances. | |
682 | ||
683 | d. The globbing code now uses fnmatch(3) to check collation elements (if | |
684 | available) even in cases without multibyte characters. | |
685 | ||
686 | e. The `fg' and `bg' builtins now return an error in a command substitution | |
687 | when asked to restart a job inherited from the parent shell. | |
688 | ||
689 | f. The shell now attempts to unlink all FIFOs on exit, whether a consuming | |
690 | process has finished with them or not. | |
691 | ||
692 | 3. Changes to Readline | |
693 | ||
694 | a. Make sure that all undo groups are closed when leaving vi insertion mode. | |
695 | ||
696 | b. Make sure that the vi-mode `C' and `c' commands enter insert mode even if | |
697 | the motion command doesn't have any effect. | |
698 | ||
699 | c. Fixed several potential memory leaks in the callback mode context handling. | |
700 | ||
701 | d. If readline is handling a SIGTTOU, make sure SIGTTOU is blocked while | |
702 | executing the terminal cleanup code, since it's no longer run in a signal | |
703 | handling context. | |
704 | ||
705 | 4. New Features in Readline | |
706 | ||
707 | a. The signal cleanup code now blocks SIGINT while processing after a SIGINT. | |
708 | ||
709 | ------------------------------------------------------------------------------ | |
710 | This document details the changes between this version, bash-5.1-alpha, and | |
711 | the previous version, bash-5.0-release. | |
712 | ||
713 | 1. Changes to Bash | |
714 | ||
715 | a. Fixed a bug that caused a posix-mode shell to not exit if the return builtin | |
716 | was executed outside a function or dot script. | |
717 | ||
718 | b. Fixed a bug where `declare +f' could potentially turn off the function | |
719 | attribute. | |
720 | ||
721 | c. Restored bash-4.4 pathname expansion behavior when a word to be expanded had | |
722 | only backslashes, not any of the other globbing characters. This came after | |
723 | an extensive POSIX group discussion (interp #1234). | |
724 | ||
725 | d. There are more changes to avoid performing word expansions multiple times on | |
726 | arithmetic expressions. | |
727 | ||
728 | e. Fixed a bug with alias expansion when the alias ends with a TAB. | |
729 | ||
730 | f. Fixed a bug that caused programmable completion to return an error if the | |
731 | shell function name supplied as an argument to `complete -F' was invalid. | |
732 | ||
733 | g. There are several fixes to buffer overflows found as the result of fuzzing | |
734 | with random input. | |
735 | ||
736 | h. Fixed a bug that caused the edit-and-execute-command editing command to | |
737 | start with the previous history line if invoked on an empty line. | |
738 | ||
739 | i. Fixed a bug that potentially caused `bind --help' to change readline's | |
740 | output stream. | |
741 | ||
742 | j. Turning off posix mode now restores the vi-insertion mode binding for TAB | |
743 | that was in effect when posix mode was enabled. | |
744 | ||
745 | k. Restore the previous state of job control being enabled if `exec' fails in | |
746 | an interactive shell. | |
747 | ||
748 | l. Fixed a bug that caused the terminal's process group to be set incorrectly | |
749 | if job control was turned off before starting an interactive shell. | |
750 | ||
751 | m. Fixed a bug that caused a crash when HISTSIZE=0. | |
752 | ||
753 | n. Fixed a word expansion bug that caused null strings on the rhs of expansions | |
754 | to be discarded incorrectly. | |
755 | ||
756 | o. History list management does a better job of handling the situation where | |
757 | the number of history entries from the current shell session is greater than | |
758 | the number of entries in the history list. | |
759 | ||
760 | p. Fixed a bug that caused the `fc' builtin to attempt to dereference a newly- | |
761 | freed history entry. | |
762 | ||
763 | q. Fixed a bug that made the `Q' variable transformation not work well with | |
764 | `set -u'. | |
765 | ||
766 | r. There are several word expansion fixes for expanding $* and $@ in contexts | |
767 | where word splitting is not going to be performed, since each positional | |
768 | parameter must expand to a separate word. | |
769 | ||
770 | s. Fixed a bug that could cause ^D to exit bash immediately even if there were | |
771 | stopped jobs. | |
772 | ||
773 | t. Fixed a bug with double-quoting and backslash-quoting strings containing | |
774 | multibyte characters for reuse. | |
775 | ||
776 | u. Fixed a bug that caused the line number to be reported incorrectly if the | |
777 | shell executed a (command) subshell. | |
778 | ||
779 | v. Fixed a bug that caused the shell to fail to reap process substitutions | |
780 | when they went out of scope, which had unpredictable results. | |
781 | ||
782 | w. Fixed a bug that caused null strings in arguments to [[ conditional command | |
783 | operators to compare incorrectly. | |
784 | ||
785 | x. Changed the behavior of `wait' without arguments to only wait for background | |
786 | processes the current shell instance started, not background children it may | |
787 | have inherited. | |
788 | ||
789 | y. Fixed a bug that could cause command substitution to leave file descriptors | |
790 | open if the shell received many SIGINTs. | |
791 | ||
792 | z. Bash now behaves better if the `**' filename expansion operator encounters a | |
793 | symbolic link to a directory, avoiding more cases where it might return | |
794 | duplicate pathnames. | |
795 | ||
796 | aa. Programmable completion now canonicalizes directory names in the same way | |
797 | as bash word completion, so `..' is handled consistently. | |
798 | ||
799 | bb. Fixed a bug when using RETURN as the delimiter to the read builtin; it | |
800 | caused readline to set the binding for RETURN incorrectly. | |
801 | ||
802 | cc. Fixed a bug that caused `history -d' to delay printing an out-of-range | |
803 | error message. | |
804 | ||
805 | dd. Fixed a bug with `bash -c command' where `command' ends with an expanded | |
806 | alias. | |
807 | ||
808 | ee. Fixed a bug that could result in `history -n' adding spurious line feeds to | |
809 | commands in the history list. | |
810 | ||
811 | ff. The $RANDOM random number generator now XORs the top and bottom halves of | |
812 | the internal 32-bit value to introduce more randomness. Setting the shell | |
813 | compatibility level to 50 or lower undoes this. | |
814 | ||
815 | gg. Fixed several problems caused by running the DEBUG trap on simple commands | |
816 | executed as part of a pipeline. | |
817 | ||
818 | ii. Fixed a bug that didn't allow `bind -r' to remove the binding for \C-@. | |
819 | ||
820 | jj. Several fixes to the bash-backward-shellword bindable readline command to | |
821 | behave better when at the last character on the line. | |
822 | ||
823 | kk. If `set -x' is enabled, bash doesn't print a command twice if it's run by | |
824 | the `command' builtin. | |
825 | ||
826 | ll. Fixed a bug with printing function definitions containing here documents. | |
827 | ||
828 | mm. Fixed a bug that could cause the `bind' builtin to set $? to -1. | |
829 | ||
830 | nn. Fixed a bug that didn't reset the timezone information correctly when the | |
831 | TZ variable was unset. | |
832 | ||
833 | oo. Fixed several issues with assigning an associative array variable using a | |
834 | compound assignment that expands the value of the same variable. | |
835 | ||
836 | pp. Fixed several places where the shell set $? without setting PIPESTATUS. | |
837 | ||
838 | qq. Fixed a problem with glob bracket expressions containing invalid character | |
839 | classes, collating symbols, or equivalence classes -- they should not | |
840 | require a closing right bracket. | |
841 | ||
842 | rr. Fixed a bug where running a builtin in a subshell did not run the EXIT trap. | |
843 | ||
844 | ss. Fixed several problems with posix-mode variable assignments preceding | |
845 | shell function calls and posix special builtins, so that they create and | |
846 | modify variables at the current scope. | |
847 | ||
848 | tt. Fix history initialization so `bash +o history' works as expected. | |
849 | ||
850 | uu. Fixed a bug in the bindable edit-and-execute-command command that could | |
851 | interfere with the shell's parsing state. | |
852 | ||
853 | vv. Fixed an issue with nested traps running command substitutions in command | |
854 | lines with command substitutions. | |
855 | ||
856 | ww. Fixed a bug with globbing pathnames that contain invalid multibyte | |
857 | characters (sequences that don't correspond to a character in the current | |
858 | locale). | |
859 | ||
860 | xx. Fixed a bug that caused the shell not to exit if a function definition | |
861 | failed while errexit was enabled. | |
862 | ||
863 | yy. Process substitution processes now get their input from /dev/null, since | |
864 | they are asynchronous, not interactive, and not jobs. | |
865 | ||
866 | zz. Setting nocaseglob no longer turns on case-insensitive regexp matching. | |
867 | ||
868 | aaa. Fixed a bug that resulted in extra blank lines being added to some history | |
869 | entries containing here-documents. | |
870 | ||
871 | bbb. Fixed a bug that resulted in incorrect matching of some patterns in word | |
872 | expansion if they expanded to the empty string. | |
873 | ||
874 | ccc. Fixed here-string expansion so it behaves the same as expansion of the | |
875 | rhs of an assignment statement. | |
876 | ||
877 | ddd. Changed here-document parsing to no longer allow the end of the here | |
878 | document to delimit a command substitution. | |
879 | ||
880 | eee. Several fixes to history expansion: multiple :p modifiers work, a ^ word | |
881 | designator works as part of a range, and a `-' is treated as part of a | |
882 | search string if it immediately follows a `!'. | |
883 | ||
884 | fff. Fixed a bug in pattern substitution with null matches in a string | |
885 | containing multibyte characters. | |
886 | ||
887 | ggg. Unbinding a key sequence bound with `bind -x' now removes the key sequence | |
888 | from the additional keymap `bind -x' uses. | |
889 | ||
890 | hhh. Fixed a bug with command start detection for completion so that it doesn't | |
891 | mistake brace expansion for the start of a command. | |
892 | ||
893 | iii. Fixed a bug that caused local variables with the same name as variables | |
894 | appearing in a function's temporary environment to not be marked as local. | |
895 | ||
896 | jjj. Fixed a bug that could cause SIGCHLD to be blocked when executing return | |
897 | or exec in the rightmost pipeline element with lastpipe enabled. | |
898 | ||
899 | kkk. Fixed a bug that could result in commands without the execute bit set | |
900 | being added to the command hash table. | |
901 | ||
902 | lll. Fixed a bug that allowed non-digits to follow the `#' in a `base#number' | |
903 | integer constant. | |
904 | ||
905 | mmm. Fixed a bug that made `time -- command' attempt to execute `--'. | |
906 | ||
907 | nnn. Fixed a couple of bugs with variable transformation using arrays | |
908 | subscripted with `*' or `@'. | |
909 | ||
910 | ooo. A failure to create a variable using `declare' in a function no longer | |
911 | causes the function to return immediately. | |
912 | ||
913 | ppp. Fixed a bug that could cause the := word expansion to add a non-null | |
914 | value if attempting to assign a null string when double-quoted. | |
915 | ||
916 | qqq. Fixed a bug that could cause backslashes quoting double quotes in here | |
917 | document bodies to not be removed when expanding the body. | |
918 | ||
919 | rrr. Fixed a bug that caused commands following a subshell while the shell is | |
920 | reading input from stdin but not interactive, while job control is | |
921 | enabled, to be executed twice. | |
922 | ||
923 | sss. Fixed a bug where receiving SIGTERM from a different process while | |
924 | readline was active could cause the shell to terminate. | |
925 | ||
926 | ttt. In posix mode, running a trap after the read builtin now sees the exit | |
927 | status of the read builtin (e.g., 130 after a SIGINT) in $?. | |
928 | ||
929 | uuu. Fixed a bug with nameref variables referencing array subscripts used in | |
930 | arithmetic expressions. | |
931 | ||
932 | vvv. Fixed a bug that caused the pipeline process group id to be reset in the | |
933 | middle of a command list run by a shell started to run a command | |
934 | substitution. | |
935 | ||
936 | www. Restricted shells can no longer read and write history files with pathnames | |
937 | containing slashes. | |
938 | ||
939 | xxx. Fixed a couple of problems with 0 and -0 used as arguments to `fc' when | |
940 | not listing commands from the history. | |
941 | ||
942 | yyy. When `test' is supplied four or more arguments, treat an argument that | |
943 | looks like an operator (e.g., -e), but is in a place where only a string | |
944 | is valid, as a string, as it would be when using the POSIX rules, instead | |
945 | of an operator with a missing argument. | |
946 | ||
947 | zzz. There is no `compat50' shopt option. Changes to the shell compatibility | |
948 | level should use the BASH_COMPAT variable. | |
949 | ||
950 | aaaa. Redirection failures with compound commands are now treated as errors | |
951 | that cause the shell to exit if `errexit' is enabled. | |
952 | ||
953 | bbbb. Redirection failure error messages no longer expand the word in the | |
954 | redirection again. | |
955 | ||
956 | cccc. History expansion is no longer performed while parsing a here-document | |
957 | inside a command substitution. | |
958 | ||
959 | 2. Changes to Readline | |
960 | ||
961 | a. There are a number of fixes that were found as the result of fuzzing with | |
962 | random input. | |
963 | ||
964 | b. Changed the revert-all-at-newline behavior to make sure to start at the end | |
965 | of the history list when doing it, instead of the line where the user hit | |
966 | return. | |
967 | ||
968 | c. When parsing `set' commands from the inputrc file or an application, readline | |
969 | now allows trailing whitespace. | |
970 | ||
971 | d. Fixed a bug that left a file descriptor open to the history file if the | |
972 | file size was 0. | |
973 | ||
974 | e. Fixed a problem with binding key sequences containing meta characters. | |
975 | ||
976 | f. Fixed a bug that caused the wrong line to be displayed if the user tried to | |
977 | move back beyond the beginning of the history list, or forward past the end | |
978 | of the history list. | |
979 | ||
980 | g. If readline catches SIGTSTP, it now sets a hook that allows the calling | |
981 | application to handle it if it desires. | |
982 | ||
983 | h. Fixed a redisplay problem with a prompt string containing embedded newlines. | |
984 | ||
985 | i. Fixed a problem with completing filenames containing invalid multibyte | |
986 | sequences when case-insensitive comparisons are enabled. | |
987 | ||
988 | j. Fixed a redisplay problem with prompt strings containing invisible multibyte | |
989 | characters. | |
990 | ||
991 | k. Fixed a problem with multibyte characters mapped to editing commands that | |
992 | modify the search string in incremental search. | |
993 | ||
994 | l. Fixed a bug with maintaining the key sequence while resolving a bound | |
995 | command in the presence of ambiguous sequences (sequences with a common | |
996 | prefix), in most cases while attempting to unbind it. | |
997 | ||
998 | m. Fixed several buffer overflows found as the result of fuzzing. | |
999 | ||
1000 | n. Reworked backslash handling when translating key sequences for key binding | |
1001 | to be more uniform and consistent, which introduces a slight backwards | |
1002 | incompatibility. | |
1003 | ||
1004 | o. Fixed a bug with saving the history that resulted in errors not being | |
1005 | propagated to the calling application when the history file is not writable. | |
1006 | ||
1007 | p. Readline only calls chown(2) on a newly-written history file if it really | |
1008 | needs to, instead of having it be a no-op. | |
1009 | ||
1010 | q. Readline now behaves better when operate-and-get-next is used when the | |
1011 | history list is `full': when there are already $HISTSIZE entries. | |
1012 | ||
1013 | r. Fixed a bug that could cause vi redo (`.') of a replace command not to work | |
1014 | correctly in the C or POSIX locale. | |
1015 | ||
1016 | s. Fixed a bug with vi-mode digit arguments that caused the last command to be | |
1017 | set incorrectly. This prevents yank-last-arg from working as intended, for | |
1018 | example. | |
1019 | ||
1020 | 3. New Features in Bash | |
1021 | ||
1022 | a. `bind -x' now supports different bindings for different editing modes and | |
1023 | keymaps. | |
1024 | ||
1025 | b. Bash attempts to optimize the number of times it forks when executing | |
1026 | commands in subshells and from `bash -c'. | |
1027 | ||
1028 | c. Here documents and here strings now use pipes for the expanded document if | |
1029 | it's smaller than the pipe buffer size, reverting to temporary files if it's | |
1030 | larger. | |
1031 | ||
1032 | d. There are new loadable builtins: mktemp, accept, mkfifo, csv, cut/lcut | |
1033 | ||
1034 | e. In posix mode, `trap -p' now displays signals whose disposition is SIG_DFL | |
1035 | and those that were SIG_IGN when the shell starts. | |
1036 | ||
1037 | f. The shell now expands the history number (e.g., in PS1) even if it is not | |
1038 | currently saving commands to the history list. | |
1039 | ||
1040 | g. `read -e' may now be used with arbitrary file descriptors (`read -u N'). | |
1041 | ||
1042 | h. The `select' builtin now runs traps if its internal call to the read builtin | |
1043 | is interrupted by a signal. | |
1044 | ||
1045 | i. SRANDOM: a new variable that expands to a 32-bit random number that is not | |
1046 | produced by an LCRNG, and uses getrandom/getentropy, falling back to | |
1047 | /dev/urandom or arc4random if available. There is a fallback generator if | |
1048 | none of these are available. | |
1049 | ||
1050 | j. shell-transpose-words: a new bindable readline command that uses the same | |
1051 | definition of word as shell-forward-word, etc. | |
1052 | ||
1053 | k. The shell now adds default bindings for shell-forward-word, | |
1054 | shell-backward-word, shell-transpose-words, and shell-kill-word. | |
1055 | ||
1056 | l. Bash now allows ARGV0 appearing in the initial shell environment to set $0. | |
1057 | ||
1058 | m. If `unset' is executed without option arguments, bash tries to unset a shell | |
1059 | function if a name argument cannot be a shell variable name because it's not | |
1060 | an identifier. | |
1061 | ||
1062 | n. The `test -N' operator uses nanosecond timestamp granularity if it's | |
1063 | available. | |
1064 | ||
1065 | o. Bash posix mode now treats assignment statements preceding shell function | |
1066 | definitions the same as in its default mode, since POSIX has changed and | |
1067 | no longer requires those assignments to persist after the function returns | |
1068 | (POSIX interp 654). | |
1069 | ||
1070 | p. BASH_REMATCH is no longer readonly. | |
1071 | ||
1072 | q. wait: has a new -p VARNAME option, which stores the PID returned by `wait -n' | |
1073 | or `wait' without arguments. | |
1074 | ||
1075 | r. Sorting the results of pathname expansion now uses byte-by-byte comparisons | |
1076 | if two strings collate equally to impose a total order; the result of a | |
1077 | POSIX interpretation (#963 and #1070). | |
1078 | ||
1079 | s. Bash now allows SIGINT trap handlers to execute recursively. | |
1080 | ||
1081 | t. Bash now saves and restores state around setting and unsetting posix mode, | |
1082 | instead of having unsetting posix mode set a known state. | |
1083 | ||
1084 | u. Process substitution is now available in posix mode. | |
1085 | ||
1086 | v. READLINE_MARK: a new variable available while executing commands bound with | |
1087 | `bind -x', contains the value of the mark. | |
1088 | ||
1089 | w. Bash removes SIGCHLD from the set of blocked signals if it's blocked at shell | |
1090 | startup. | |
1091 | ||
1092 | x. `test -v N' can now test whether or not positional parameter N is set. | |
1093 | ||
1094 | y. `local' now honors the `-p' option to display all local variables at the | |
1095 | current context. | |
1096 | ||
1097 | z. The `@a' variable transformation now prints attributes for unset array | |
1098 | variables. | |
1099 | ||
1100 | aa. The `@A' variable transformation now prints a declare command that sets a | |
1101 | variable's attributes if the variable has attributes but is unset. | |
1102 | ||
1103 | bb. `declare' and `local' now have a -I option that inherits attributes and | |
1104 | value from a variable with the same name at a previous scope. | |
1105 | ||
1106 | cc. When run from a -c command, `jobs' now reports the status of completed jobs. | |
1107 | ||
1108 | dd. New `U', `u', and `L' parameter transformations to convert to uppercase, | |
1109 | convert first character to uppercase, and convert to lowercase, | |
1110 | respectively. | |
1111 | ||
1112 | ee. PROMPT_COMMAND: can now be an array variable, each element of which can | |
1113 | contain a command to be executed like a string PROMPT_COMMAND variable. | |
1114 | ||
1115 | ff. `ulimit' has a -R option to report and set the RLIMIT_RTTIME resource. | |
1116 | ||
1117 | gg. Associative arrays may be assigned using a list of key-value pairs within | |
1118 | a compound assignment. Compound assignments where the words are not of | |
1119 | the form [key]=value are assumed to be key-value assignments. A missing or | |
1120 | empty key is an error; a missing value is treated as NULL. Assignments may | |
1121 | not mix the two forms. | |
1122 | ||
1123 | hh. New `K' parameter transformation to display associative arrays as key- | |
1124 | value pairs. | |
1125 | ||
1126 | ii. Writing history to syslog now handles messages longer than the syslog max | |
1127 | length by writing multiple messages with a sequence number. | |
1128 | ||
1129 | jj. SECONDS and RANDOM may now be assigned using arithmetic expressions, since | |
1130 | they are nominally integer variables. LINENO is not an integer variable. | |
1131 | ||
1132 | kk. Bash temporarily suppresses the verbose option when running the DEBUG trap | |
1133 | while running a command from the `fc' builtin. | |
1134 | ||
1135 | ll. `wait -n' now accepts a list of job specifications as arguments and will | |
1136 | wait for the first one in the list to change state. | |
1137 | ||
1138 | mm. The associative array implementation can now dynamically increase the | |
1139 | size of the hash table based on insertion patterns. | |
1140 | ||
1141 | nn. HISTFILE is now readonly in a restricted shell. | |
1142 | ||
1143 | oo. The bash malloc now returns memory that is 16-byte aligned on 64-bit | |
1144 | systems. | |
1145 | ||
1146 | 4. New Features in Readline | |
1147 | ||
1148 | a. If a second consecutive completion attempt produces matches where the first | |
1149 | did not, treat it as a new completion attempt and insert a match as | |
1150 | appropriate. | |
1151 | ||
1152 | b. Bracketed paste mode works in more places: incremental search strings, vi | |
1153 | overstrike mode, character search, and reading numeric arguments. | |
1154 | ||
1155 | c. Readline automatically switches to horizontal scrolling if the terminal has | |
1156 | only one line. | |
1157 | ||
1158 | d. Unbinding all key sequences bound to a particular readline function now | |
1159 | descends into keymaps for multi-key sequences. | |
1160 | ||
1161 | e. rl-clear-display: new bindable command that clears the screen and, if | |
1162 | possible, the scrollback buffer (bound to emacs mode M-C-l by default). | |
1163 | ||
1164 | f. New active mark and face feature: when enabled, it will highlight the text | |
1165 | inserted by a bracketed paste (the `active region') and the text found by | |
1166 | incremental and non-incremental history searches. This is tied to bracketed | |
1167 | paste and can be disabled by turning off bracketed paste. | |
1168 | ||
1169 | g. Readline sets the mark in several additional commands. | |
1170 | ||
1171 | h. Bracketed paste mode is enabled by default. | |
1172 | ||
1173 | i. Readline tries to take advantage of the more regular structure of UTF-8 | |
1174 | characters to identify the beginning and end of characters when moving | |
1175 | through the line buffer. | |
1176 | ||
1177 | j. The bindable operate-and-get-next command (and its default bindings) are | |
1178 | now part of readline instead of a bash-specific addition. | |
1179 | ||
1180 | ------------------------------------------------------------------------------ | |
d233b485 CR |
1181 | This document details the changes between this version, bash-5.0-release, and |
1182 | the previous version, bash-5.0-rc1. | |
1183 | ||
1184 | 1. Changes to Bash | |
1185 | ||
1186 | a. Tilde expansion isn't performed on indexed array subscripts, even for | |
1187 | backwards compatibility. | |
1188 | ||
1189 | b. The shell doesn't exit in posix mode if the eval builtin gets a parse | |
1190 | error when run by the command builtin. | |
1191 | ||
1192 | c. Fixed a bug that caused a shell comment in an alias to not find the end | |
1193 | of the alias properly. | |
1194 | ||
1195 | d. Reverted a change from April, 2018 that caused strings containing | |
1196 | backslashes to be flagged as glob patterns. | |
1197 | ||
1198 | 2. Changes to Readline | |
1199 | ||
1200 | 3. New Features in Bash | |
1201 | ||
1202 | 4. New Features in Readline | |
1203 | ||
1204 | ------------------------------------------------------------------------------ | |
1205 | This document details the changes between this version, bash-5.0-rc1, and | |
1206 | the previous version, bash-5.0-beta2. | |
1207 | ||
1208 | 1. Changes to Bash | |
1209 | ||
1210 | a. Fix to initial word completion detection code. | |
1211 | ||
1212 | b. Fixed a bug that caused issues with assignment statements containing ^A in | |
1213 | the value assigned when IFS contains ^A. | |
1214 | ||
1215 | c. Added a fallback to fnmatch() when strcoll can't correctly deal with | |
1216 | bracket expression character equivalence classes. | |
1217 | ||
1218 | d. Fixed a bug that caused $BASH_COMMAND to contain the trap handler command | |
1219 | when running a trap handler containing [[ or (( commands. | |
1220 | ||
1221 | e. Fixed a bug that caused nameref assignments in the temporary environment | |
1222 | to potentially create variables with invalid names. | |
1223 | ||
1224 | f. Fixed a bug that caused `local -' to turn off alias expansion in scripts. | |
1225 | ||
1226 | g. Fixed a parser issue with a command string containing EOF after an invalid | |
1227 | command as an argument to a special builtin not causing a posix-mode shell | |
1228 | to exit. | |
1229 | ||
1230 | h. Made a slight change to the FNV-1 string hash algorithm used for associative | |
1231 | arrays (corrected the initial seed). | |
1232 | ||
1233 | 2. Changes to Readline | |
1234 | ||
1235 | 3. New Features in Bash | |
1236 | ||
1237 | a. The `select' command now supports command forms without a word list | |
1238 | following `in'. | |
1239 | ||
1240 | 4. New Features in Readline | |
1241 | ||
1242 | ------------------------------------------------------------------------------ | |
1243 | This document details the changes between this version, bash-5.0-beta2, and | |
1244 | the previous version, bash-5.0-beta. | |
1245 | ||
1246 | 1. Changes to Bash | |
1247 | ||
1248 | a. Fixed a bug that could cause a seg fault while parsing a subshell command | |
1249 | inside a command substitution. | |
1250 | ||
1251 | b. Fixed several small memory leaks uncovered by coverity. | |
1252 | ||
1253 | c. Fixed a problem with command substitution inside an interactive shell that | |
1254 | could cause the parent to receive a SIGHUP. | |
1255 | ||
1256 | d. Fixed a problem with using `*' and `@' as subscripts when assigning values | |
1257 | to an associative array with assoc_expand_once enabled. | |
1258 | ||
1259 | e. Fixed a bug that could cause a huge memory allocation when completing a | |
1260 | word beginning with an invalid tilde expansion. | |
1261 | ||
8868edaf | 1262 | f. Cleaned up some incompatibilities with bash-4.4 when expanding indexed array |
d233b485 CR |
1263 | subscripts used in arithmetic expansions when assoc_expand_once is enabled. |
1264 | ||
1265 | g. The ${parameter@a} expansion will display attributes even if `parameter' is | |
1266 | unset. | |
1267 | ||
1268 | h. Fixed a bug that caused the output of `set' to cut off some variables before | |
1269 | printing the value. | |
1270 | ||
1271 | i. Treat a failure to assign a variable when using the ${x:=value} expansion | |
1272 | as an expansion error, so non-interactive posix-mode shells exit | |
1273 | ||
1274 | j. Fixed a problem when expanding $* in a context where word splitting is not | |
1275 | performed when IFS is NULL. | |
1276 | ||
1277 | k. Temp files used to store here documents are forced readable, no matter what | |
1278 | the user's umask says. | |
1279 | ||
1280 | l. Fixed a problem where an interrupted brace expansion could cause the shell | |
1281 | to attempt to free an invalid memory location. | |
1282 | ||
1283 | m. Make sure to check for any terminating signals after running a trap | |
1284 | handler; don't wait until the next time we process traps. | |
1285 | ||
1286 | n. Fixed a bug that caused "return" to act like a special builtin with respect | |
1287 | to variable assignments even when preceded by "command". | |
1288 | ||
1289 | o. POSIX-mode shells now return failure if the cd builtin fails due to the | |
1290 | absolute directory name being longer than PATH_MAX, instead of trying | |
1291 | again with a relative pathname. | |
1292 | ||
1293 | p. Fixed a problem with FUNCNAME occasionally being visible when not executing | |
1294 | a shell function. | |
1295 | ||
1296 | q. Fixed a problem with the expansions performed on the WORD in the case | |
1297 | command. | |
1298 | ||
1299 | r. Fixed a slight POSIX compatibility when removing "IFS whitespace" during | |
1300 | word splitting and the read builtin. | |
1301 | ||
1302 | s. Fixed a problem with expanding an array with subscript `*' when all the | |
1303 | elements expand to the empty string, and making sure the expansion honors | |
1304 | the `:' specifier. | |
1305 | ||
1306 | 2. Changes to Readline | |
1307 | ||
1308 | a. Fixed a bug with adding multibyte characters to an incremental search string. | |
1309 | ||
1310 | b. Fixed a bug with redoing text insertions in vi mode. | |
1311 | ||
1312 | c. Fixed a bug with pasting text into an incremental search string if bracketed | |
1313 | paste mode is enabled. ESC cannot be one of the incremental search | |
1314 | terminator characters for this to work. | |
1315 | ||
1316 | d. Fixed a bug with anchored search patterns when performing searches in vi | |
1317 | mode. | |
1318 | ||
1319 | 3. New Features in Bash | |
1320 | ||
1321 | a. Associative and indexed arrays now allow subscripts consisting solely of | |
1322 | whitespace. | |
1323 | ||
1324 | b. `checkwinsize' is now enabled by default. | |
1325 | ||
1326 | c. The `localvar_unset' shopt option is now visible and documented. | |
1327 | ||
1328 | d. The `progcomp_alias' shopt option is now visible and documented. | |
1329 | ||
1330 | e. The signal name processing code now understands `SIGRTMIN+n' all the way | |
1331 | up to SIGRTMAX. | |
1332 | ||
1333 | f. There is a new `seq' loadable builtin. | |
1334 | ||
1335 | g. Trap execution now honors the (internal) max invocations of `eval', since | |
1336 | traps are supposed to be executed as if using `eval'. | |
1337 | ||
1338 | h. The $_ variable doesn't change when the shell executes a command that forks. | |
1339 | ||
1340 | i. The `kill' builtin now supports -sSIGNAME and -nSIGNUM, even though | |
1341 | conforming applications aren't supposed to use them. | |
1342 | ||
1343 | j. POSIX mode now enables the `shift_verbose' option. | |
1344 | ||
1345 | 4. New Features in Readline | |
1346 | ||
1347 | a. Readline now allows application-defined keymap names; there is a new public | |
1348 | function, rl_set_keymap_name(), to do that. | |
1349 | ||
1350 | b. The "Insert" keypad key, if available, now puts readline into overwrite | |
1351 | mode. | |
1352 | ||
1353 | ------------------------------------------------------------------------------ | |
1354 | This document details the changes between this version, bash-5.0-beta, and | |
1355 | the previous version, bash-5.0-alpha. | |
1356 | ||
1357 | 1. Changes to Bash | |
1358 | ||
1359 | a. Fixed a bug that allowed subshells to "inherit" enclosing loops -- this | |
1360 | is where POSIX says the subshell is not "enclosed" by the loop. | |
1361 | ||
1362 | b. Added more UTF-8-specific versions of multibyte functions, and optimized | |
1363 | existing functions if the current locale uses UTF-8 encoding. | |
1364 | ||
1365 | c. In POSIX mode, assignments preceding regular builtins should not persist | |
1366 | when the builtin completes. | |
1367 | ||
1368 | d. Added additional checks to special array assignment (e.g., BASH_ALIASES) | |
1369 | so it can't be used to bypass validity checks performed in other places. | |
1370 | ||
1371 | e. The `!!' history expansion now refers to the previous history entry as | |
1372 | expected, even if used on the second or subsequent line of a multi-line | |
1373 | history entry. | |
1374 | ||
1375 | f. Fixed a bug that could cause the shell to dereference a NULL pointer if | |
1376 | the environment (`environ') is set to NULL. | |
1377 | ||
1378 | g. Bash uses slightly better integer overflow handling for brace sequence | |
1379 | expansion on systems where ints are 32 bits and intmax_t is 64 bits. | |
1380 | ||
1381 | h. Fixed a bug setting attributes for a variable named as an argument to | |
1382 | `declare' that also appears as a nameref in the temporary environment. | |
1383 | ||
1384 | i. Fixed several bugs that could cause assignments to namerefs to create | |
1385 | variables with invalid names. | |
1386 | ||
1387 | j. Fixed a bug that could result in the SIGINT handler being set incorrectly | |
1388 | in asynchronous subshells. | |
1389 | ||
1390 | k. Fixed a bug that could cause `bash -t' to not execute the specified command. | |
1391 | ||
1392 | l. Fixed several bugs that caused the shell to operate on the wrong variable | |
1393 | when using namerefs with the same name as a global variable in shell | |
1394 | functions. | |
1395 | ||
1396 | m. Internal changes to how the shell handles variables with invalid names in | |
1397 | the initial environment and to prevent variables with invalid names from | |
1398 | being added to the environment instead of passing them on to children. | |
1399 | ||
1400 | n. Changes to make sure that an expansion that results in a quoted null string | |
1401 | is reflected in the expansion, even if the word expands to nothing. | |
1402 | ||
1403 | o. Changes to make sure that $* and ${array[*]} (and $@/${array[@]}) expand | |
1404 | the same way after the recent changes for POSIX interpretation 888. | |
1405 | ||
1406 | p. Saving and restoring the positional parameters at function entry and exit | |
1407 | is considerably more efficient; noticeably so when there are large numbers | |
1408 | of positional parameters. | |
1409 | ||
1410 | q. Fixed a bug that caused `lastpipe' and `pipefail' to return an incorrect | |
1411 | status for the pipeline if there was more than one external command in a | |
1412 | loop body appearing in the last pipeline element. | |
1413 | ||
1414 | r. Fixed a bug that caused value conversion errors with the printf builtin's | |
1415 | %u and %f conversion specifications and invalid constants. | |
1416 | ||
1417 | 2. Changes to Readline | |
1418 | ||
1419 | a. Added more UTF-8-specific versions of multibyte functions, and optimized | |
1420 | existing functions if the current locale uses UTF-8 encoding. | |
1421 | ||
1422 | b. Fixed a problem with bracketed-paste inserting more than one character and | |
1423 | interacting with other readline functions. | |
1424 | ||
1425 | c. Fixed a bug that caused the history library to attempt to append a history | |
1426 | line to a non-existent history entry. | |
1427 | ||
1428 | d. If using bracketed paste mode, output a newline after the \r that is the | |
1429 | last character of the mode disable string to avoid overwriting output. | |
1430 | ||
1431 | e. Fixes to the vi-mode `b', `B', `w', `W', `e', and `E' commands to better | |
1432 | handle multibyte characters. | |
1433 | ||
1434 | f. Fixed a redisplay problem that caused an extra newline to be generated on | |
1435 | accept-line when the line length is exactly the screenwidth. | |
1436 | ||
1437 | 3. New Features in Bash | |
1438 | ||
1439 | a. Bash no longer allows variable assignments preceding a special builtin that | |
1440 | changes variable attributes to propagate back to the calling environment | |
1441 | unless the compatibility level is 44 or lower. | |
1442 | ||
1443 | b. You can set the default value for $HISTSIZE at build time in config-top.h. | |
1444 | ||
1445 | c. The `complete' builtin now accepts a -I option that applies the completion | |
1446 | to the initial word on the line. | |
1447 | ||
1448 | d. The internal bash malloc now uses mmap (if available) to satisfy requests | |
1449 | greater than 128K bytes, so free can use mfree to return the pages to the | |
1450 | kernel. | |
1451 | ||
1452 | e. The shell doesn't automatically set BASH_ARGC and BASH_ARGV at startup | |
1453 | unless it's in debugging mode, as the documentation has always said, but | |
1454 | will dynamically create them if a script references them at the top level | |
1455 | without having enabled debugging mode. | |
1456 | ||
1457 | f. The localvar_inherit option will not attempt to inherit a value from a | |
1458 | variable of an incompatible type (indexed vs. associative arrays, for | |
1459 | example). | |
1460 | ||
1461 | g. The `globasciiranges' option is now enabled by default; it can be set to | |
1462 | off by default at configuration time. | |
1463 | ||
1464 | 4. New Features in Readline | |
1465 | ||
1466 | a. The history expansion library now understands command and process | |
1467 | substitution and extended globbing and allows them to appear anywhere in a | |
1468 | word. | |
1469 | ||
1470 | b. The history library has a new variable that allows applications to set the | |
1471 | initial quoting state, so quoting state can be inherited from a previous | |
1472 | line. | |
1473 | ||
1474 | ------------------------------------------------------------------------------ | |
1475 | This document details the changes between this version, bash-5.0-alpha, and | |
1476 | the previous version, bash-4.4-release. | |
1477 | ||
1478 | 1. Changes to Bash | |
1479 | ||
1480 | a. Fixed a bug that could cause traps in background jobs to give the terminal | |
1481 | to the wrong process group. | |
1482 | ||
1483 | b. Fixed a bug that caused `kill -l 0' to print an out-of-range error. | |
1484 | ||
1485 | c. Fixed a problem that could result in here-documents being displayed in | |
1486 | the wrong order. | |
1487 | ||
1488 | d. Fixed a number of out-of-bounds and free memory read errors found via | |
1489 | fuzzing. | |
1490 | ||
1491 | e. Fixed a subshell inheritance problem that could cause a subshell to wait for | |
1492 | the wrong process. | |
1493 | ||
1494 | f. Fixed a bug that caused SHLVL to be incremented one too many times when | |
1495 | creating subshells. | |
1496 | ||
1497 | g. A job dying due to SIGINT can now interrupt sourcing a file in a shell with | |
1498 | job control enabled. | |
1499 | ||
1500 | h. Fixed a spurious warning about unterminated ${ or $( constructs during | |
1501 | word completion. | |
1502 | ||
1503 | i. The shell no longer runs traps if a signal arrives while reading command | |
1504 | substitution output. | |
1505 | ||
1506 | j. Fixed an arithmetic expansion error that could allow ++var++ as valid | |
1507 | syntax. | |
1508 | ||
1509 | k. Fixed an error that allowed out-of-bounds references to the directory stack. | |
1510 | ||
1511 | l. The shell does a better job of saving multi-line history entries with | |
1512 | embedded comments. | |
1513 | ||
1514 | m. Fixed a bug that could cause quoted bracket expressions in regular expression | |
1515 | arguments to `[[' to not match correctly. | |
1516 | ||
1517 | n. Fixed a bug that could cause an IFS character in a word to result in an | |
1518 | extra '\001' character in the expansion. | |
1519 | ||
1520 | o. A trailing backslash in a glob pattern can match a trailing backslash in the | |
1521 | string. | |
1522 | ||
1523 | p. Fixed a memory leak in the process creation code path when job control is | |
1524 | enabled. | |
1525 | ||
1526 | q. Fixed a bug that caused `printf' to output broken surrogate pairs for | |
1527 | Japanese locales. | |
1528 | ||
1529 | r. Fixed a bug that caused a SIGINT generated from `kill' in a dot script to | |
1530 | kill an interactive shell. | |
1531 | ||
1532 | s. Fixed a bug that could cause the `read' builtin to not fully read a | |
1533 | multibyte character. | |
1534 | ||
1535 | t. Fixed a bug that could cause identifiers to be evaluated in conditional | |
1536 | arithmetic expressions even when evaluation is suppressed. | |
1537 | ||
1538 | u. Fixed a bug that could result in command substitution, when executed in a | |
1539 | context where word splitting is not performed, to leave a stray '\001' | |
1540 | character in the string. | |
1541 | ||
1542 | v. Fixed a bug that could cause history expansion to be disabled in a non- | |
1543 | interactive shell even if `-o histexpand' is supplied at startup. | |
1544 | ||
1545 | w. Fixed a bug that caused `read -N' to strip leading whitespace IFS characters. | |
1546 | ||
1547 | x. Fixed a bug that caused spurious tilde expansion in arithmetic expressions. | |
1548 | ||
1549 | y. If indirect expansion attempts to indirectly reference through an unset | |
1550 | variable, report an error. | |
1551 | ||
1552 | z. Added a guard to prevent the shell from looping while receiving an endless | |
1553 | stream of SIGTTIN at shell startup. | |
1554 | ||
1555 | aa. Fixed a bug with parsing here documents inside a command substitution when | |
1556 | looking for the closing delimiter. | |
1557 | ||
1558 | bb. Fixed a bug that caused printf to not quote all <blank> characters in the | |
1559 | current locale when using the `%q' format specifier. | |
1560 | ||
1561 | cc. Fixed a bug with bash's internal buffered I/O system that caused the input | |
1562 | pointer to not be reset when read(2) returned an EOF. | |
1563 | ||
1564 | dd. Bash now installs its SIGWINCH signal handler with SA_RESTART, so it will | |
1565 | not interrupt open/read/write system calls. | |
1566 | ||
1567 | ee. The ERR trap now reports line numbers more reliably. | |
1568 | ||
1569 | ff. The shell no longer tries to manipulate the terminal process group if a | |
1570 | command or process substitution is killed by SIGTERM when job control is | |
1571 | enabled. | |
1572 | ||
1573 | gg. Fixed a bug that caused extglob patterns to match filenames beginning with | |
1574 | a period. | |
1575 | ||
1576 | hh. File descriptors open for writing to here documents are no longer available | |
1577 | to subshells. | |
1578 | ||
1579 | ii. Make sure word completion doesn't perform command or process substitution. | |
1580 | ||
1581 | jj. Fixed a bug with parsing $$'...' inside a command substitution. | |
1582 | ||
1583 | kk. Fixed a bug that caused bash to remove backslash-newline pairs from the | |
1584 | body of a here-document with a quoted delimiter inside a command | |
1585 | substitution. | |
1586 | ||
1587 | ll. Fixed a bug that could cause the shell to hang when adding a pid to the | |
1588 | table of background process exit statuses. | |
1589 | ||
1590 | mm. Fixed a bug that could cause 0x01 characters to be doubled in the output | |
1591 | of process substitution. | |
1592 | ||
1593 | nn. Restricted shells now clear the hash table before making the PATH variable | |
1594 | read-only. | |
1595 | ||
1596 | oo. There are a number of changes to the expansion of $* and $@ in contexts | |
1597 | where word splitting does not occur (quoted and unquoted), with IFS set | |
1598 | to NULL or a non-standard value, mostly to deal with the consequences of | |
1599 | the behavior defined in Posix interpretation 888. | |
1600 | ||
1601 | pp. There are a number of changes to nameref variable handling to avoid | |
1602 | creating variables with invalid names. | |
1603 | ||
1604 | qq. A non-interactive posix mode shell no longer exits when an assignment | |
1605 | statement fails if the assignment is utimately being performed by the | |
1606 | `command' builtin. | |
1607 | ||
1608 | rr. When using character class names for globbing, don't allow case | |
1609 | insensitivity, even if nocaseglob is enabled. | |
1610 | ||
1611 | ss. Fixed a bug that allowed some redirections to stay in place if a later | |
1612 | redirection failed. | |
1613 | ||
1614 | tt. Fixed a bug in how command and process substitutions are recognized within | |
1615 | other parameter expansions. | |
1616 | ||
1617 | uu. Fixed a bug that caused bash to loop under certain circumstances when | |
1618 | performing arithmetic expansion on a variable whose value is an invalid | |
1619 | expression. | |
1620 | ||
1621 | vv. Fixed a bug that could cause bash to expand aliases inappropriately while | |
1622 | parsing compound commands like `case'. | |
1623 | ||
1624 | ww. Fixed a bug that could cause `read -N' to fail to read complete multibyte | |
1625 | characters, even when the sequences are incomplete or invalid, with or | |
1626 | without readline. | |
1627 | ||
1628 | xx. Fixed a bug that could cause `case' to fail to match patterns containing | |
1629 | 0x01 characters. | |
1630 | ||
1631 | yy. Fixed a bug that caused exported functions to contain stray 0x01 characters. | |
1632 | ||
1633 | zz. Fixed some inconsistencies with how the history number is handled in the | |
1634 | various prompt strings. | |
1635 | ||
1636 | aaa. Fixed a bug that could cause a core dump if READLINE_LINE was unset | |
1637 | inside a shell function bound to a key sequence with `bind -x'. | |
1638 | ||
1639 | bbb. Fixed a bug that could cause bash to not read a token terminator correctly | |
1640 | if a command substitution was used inside an arithmetic `for' command. | |
1641 | ||
1642 | ccc. Fixed problems that could occur with a fatal arithmetic expansion error | |
1643 | in a context (like prompt expansion) where you can't jump back to the | |
1644 | top level. | |
1645 | ||
1646 | ddd. Expression errors in arithmetic `for' commands are treated more like | |
1647 | shell syntax errors. | |
1648 | ||
1649 | eee. Fixed a parser synchronization error resulting from a syntax error | |
1650 | followed immediately by an EOF. | |
1651 | ||
1652 | fff. When executing a shell function, the first line in the function ($LINENO) | |
1653 | is line 1 instead of line 0, as Posix requires. | |
1654 | ||
1655 | ggg. In Posix mode, bash will canonicalize the value of PWD it inherits from | |
1656 | the environment and use that to set its idea of the current directory. | |
1657 | ||
1658 | hhh. If LINENO is exported, bash needs to regenerate its value each time it | |
1659 | constructs the environment. | |
1660 | ||
1661 | iii. Fixed a bug with restoring the SIGINT handler when using `wait -n'. | |
1662 | ||
1663 | jjj. Make sure the `coproc' command returns an appropriate status if the NAME | |
1664 | argument is invalid. | |
1665 | ||
1666 | kkk. Fixed a problem with arithmetic expressions containing array references | |
1667 | that contain arithmetic expressions with syntax errors. | |
1668 | ||
1669 | lll. The `select' command and help builtin will use $COLUMNS before the window | |
1670 | size returned from the kernel as the terminal width. | |
1671 | ||
1672 | mmm. `read -n 0' and `read -N 0' now try a zero-length read in an attempt to | |
1673 | detect file descriptor errors. | |
1674 | ||
1675 | nnn. The `read' builtin now does a better job of acting on signals that don't | |
1676 | interrupt read(2). | |
1677 | ||
1678 | ooo. Fixed some cases where `printf -v' did not return failure status on a | |
1679 | variable assignment error. | |
1680 | ||
1681 | ppp. Fixed temporary environment propagation back to the current environment | |
1682 | so that it doesn't happen for special builtins run by the `command' | |
1683 | builtin. | |
1684 | ||
1685 | qqq. Fixed a bug when searching for the end of a here-document delimiter in a | |
1686 | command substitution. | |
1687 | ||
1688 | rrr. Fixed a bug that could cause `cd ${DIRSTACK[0]}' to fail. | |
1689 | ||
1690 | sss. Fixed a bug that could cause reserved words to not be recognized in a | |
1691 | for statement without the `in' inside a command substitution. | |
1692 | ||
1693 | ttt. Fixed a bug that could cause a double-free in a timed command with an | |
1694 | expansion error. | |
1695 | ||
1696 | uuu. Fixed a bug that could cause a core dump if a script switches from a UTF-8 | |
1697 | locale to a different locale after displaying a lone surrogate character. | |
1698 | ||
1699 | vvv. Fixed cases where bash prematurely removed FIFOs attached to process | |
1700 | substitutions. | |
1701 | ||
1702 | www. Fixed a problem with calculating the size of the table that stores exit | |
1703 | statuses from background processes when the child process resource limit | |
1704 | is very large. | |
1705 | ||
1706 | xxx. Fixed a memory leak with functions using `return' when using FIFOs for | |
1707 | standard input. | |
1708 | ||
1709 | yyy. `wait' without arguments attempts to wait for all active process | |
1710 | substitution processes. | |
1711 | ||
1712 | zzz. Fixed a bug where an indirect parameter was subjected to word splitting | |
1713 | when trying to find the indirected variable name. | |
1714 | ||
1715 | aaaa. Fixed a bug that could allow restricted shell users to add commands to | |
1716 | the hash table. | |
1717 | ||
1718 | bbbb. When using the `!(patlist)' extended globbing operator, a filename | |
1719 | beginning with a `.' that doesn't match any of the patterns is not | |
1720 | returned as a match if leading dots must be matched explicitly. | |
1721 | ||
1722 | cccc. Fixed a bug that could cause line number and source file information for | |
1723 | a function definition to be incorrect if there are multiple definitions. | |
1724 | ||
1725 | dddd. Fixed a bug that could cause builtins like `readonly' to behave | |
1726 | differently when applied to arrays and scalar variables within functions. | |
1727 | ||
1728 | eeee. Fixed a bug that could cause alias expansion to add an extra space to | |
1729 | a quoted string that begins outside the alias expansion. | |
1730 | ||
1731 | ffff. Fixed a bug that could result in unwanted alias expansion after timing | |
1732 | the null command. | |
1733 | ||
1734 | gggg. Fixed a bug that could cause a core dump if a timestamp in a history | |
1735 | file overflowed a time_t. | |
1736 | ||
1737 | hhhh. Restricted shells can no longer redirect from /dev/tcp or /dev/udp, since | |
1738 | the kernel calls make those file descriptors read-write. | |
1739 | ||
1740 | iiii. Fixed a problem with splitting double-quoted words for programmable | |
1741 | completion when the double quote immediately follows another word | |
1742 | delimiter. | |
1743 | ||
1744 | jjjj. Fixed a bug resulting in a use-after-free if two file descriptors share | |
1745 | the same input buffer. | |
1746 | ||
1747 | kkkk. The error message resulting from ${x:?} and ${x?} now differs depending | |
1748 | on whether the variable is null or unset. | |
1749 | ||
1750 | llll. In Posix mode, the shell exits if a variable assignment fails and precedes | |
1751 | an empty simple command (after expansion). | |
1752 | ||
1753 | mmmm. Fixed a timing problem with SIGALRM that could cause the read builtin to | |
1754 | drop characters. | |
1755 | ||
1756 | nnnn. Added code to deal with kill(2) failing to send the shell a fatal signal | |
1757 | due to Linux pid namespace peculiarities. | |
1758 | ||
1759 | oooo. Fixed a bug that made \C-@ (NUL) unusable in key sequences used for | |
1760 | `bind -x' commands. | |
1761 | ||
1762 | pppp. Fixed a bug that could cause SIGINT recursion when running an external | |
1763 | command in a trap the shell takes after a command exits due to SIGINT. | |
1764 | ||
1765 | qqqq. Make sure the shell turns off job control before running the command- | |
1766 | not-found handle, so the command doesn't try to manipulate process | |
1767 | groups. | |
1768 | ||
1769 | rrrr. Fixed a problem with timing process substitutions that caused the shell | |
1770 | to print timing information for the calling command. | |
1771 | ||
1772 | ssss. Fixed a bug that caused backquotes in a here-document delimiter to mark | |
1773 | the delimiter as quoted (inhibiting expansion of the here-document | |
1774 | contents). | |
1775 | ||
1776 | tttt. Fixed several problems with 0x01 and 0x177 in case pattern lists and | |
1777 | conditional command pattern matches. | |
1778 | ||
1779 | uuuu. Fixed a bug that could cause the pattern matching engine to not recognize | |
1780 | locale-specific character classes. | |
1781 | ||
1782 | vvvv. The auto-configuration now tests for /dev/stdin and /dev/fd independently. | |
1783 | ||
1784 | wwww. The `globstar' code now skips over symbolic links to directories, | |
1785 | preventing them from being scanned twice. | |
1786 | ||
1787 | xxxx. When running `bind -x' commands, bash now sets READLINE_POINT based on | |
1788 | the number of characters in the readline line buffer, not the number of | |
1789 | bytes. | |
1790 | ||
1791 | yyyy. Fixed a problem that could cause recursive trap evaluation of the RETURN | |
1792 | trap when using `eval return'. | |
1793 | ||
1794 | zzzz. Fixed a bug with expanding 0x01 in an unquoted here-document. | |
1795 | ||
1796 | aaaaa. The process substitution code now closes and unlinks FIFOs when the | |
1797 | process on the other side exits, in order to prevent SIGPIPE or | |
1798 | waiting until a FIFO opened for read has a writer. | |
1799 | ||
1800 | bbbbb. Fixed a bug with recursive calls to the parser overwriting the token in | |
1801 | an {id}>foo construct. | |
1802 | ||
1803 | ccccc. After a Posix discussion, the pattern matching engine just skips over | |
1804 | invalid character classes in bracket expressions, instead of matching | |
1805 | them like individual characters in the expression. | |
1806 | ||
1807 | ddddd. Fixed a posix-mode problem with variable scoping when creating variables | |
1808 | from assignment statements preceding special builtins. | |
1809 | ||
1810 | eeeee. Fixed a bug that could cause patterns containing backslashes to not be | |
1811 | run through the pattern matching engine. | |
1812 | ||
1813 | fffff. Fixed a bug that could cause redirections to compound commands to not | |
1814 | be `undone' if the file descriptor in the redirection was closed when | |
1815 | the redirection was initially processed. | |
1816 | ||
1817 | ggggg. Fixed a bug that could cause buffer corruption when using `bind -x' in | |
1818 | a command execute as a result of a key binding installed by `bind -x'. | |
1819 | ||
1820 | 2. Changes to Readline | |
1821 | ||
1822 | a. Added a guard to prevent nested macros from causing an infinite expansion | |
1823 | loop. | |
1824 | ||
1825 | b. Instead of allocating enough history list entries to hold the maximum list | |
1826 | size, cap the number allocated initially. | |
1827 | ||
1828 | c. Added a strategy to avoid allocating huge amounts of memory if a block of | |
1829 | history entries without timestamps occurs after a block with timestamps. | |
1830 | ||
1831 | d. Added support for keyboard timeouts when an ESC character is the last | |
1832 | character in a macro. | |
1833 | ||
1834 | e. There are several performance improvements when in a UTF-8 locale. | |
1835 | ||
1836 | f. Readline does a better job of preserving the original set of blocked | |
1837 | signals when using pselect() to wait for input. | |
1838 | ||
1839 | g. Fixed a bug that caused multibyte characters in macros to be mishandled. | |
1840 | ||
1841 | h. Fixed several bugs in the code that calculates line breaks when expanding | |
1842 | prompts that span several lines, contain multibyte characters, and contain | |
1843 | invisible character seqeuences. | |
1844 | ||
1845 | i. Fixed several bugs in cursor positioning when displaying lines with prompts | |
1846 | containing invisible characters and multibyte characters. | |
1847 | ||
1848 | j. When performing case-insensitive completion, Readline no longer sorts the | |
1849 | list of matches unless directed to do so. | |
1850 | ||
1851 | k. Fixed a problem with key sequences ending with a backslash. | |
1852 | ||
1853 | l. Fixed out-of-bounds and free memory read errors found via fuzzing. | |
1854 | ||
1855 | m. Fixed several cases where the mark was set to an invalid value. | |
1856 | ||
1857 | n. Fixed a problem with the case-changing operators in the case where the | |
1858 | lower and upper case versions of a character do not have the same number | |
1859 | of bytes. | |
1860 | ||
1861 | o. Handle incremental and non-incremental search character reads returning EOF. | |
1862 | ||
1863 | p. Handle the case where a failing readline command at the end of a multi-key | |
1864 | sequence could be misinterpreted. | |
1865 | ||
1866 | q. The history library now prints a meaningful error message if the history | |
1867 | file isn't a regular file. | |
1868 | ||
1869 | r. Fixed a problem with vi-mode redo (`.') on a command when trying to replace | |
1870 | a multibyte character. | |
1871 | ||
1872 | s. The key binding code now attempts to remove a keymap if a key unbinding | |
1873 | leaves it empty. | |
1874 | ||
1875 | t. Fixed a line-wrapping issue that caused problems for some terminal | |
1876 | emulators. | |
1877 | ||
1878 | u. If there is a key bound to the tty's VDISCARD special character, readline | |
1879 | disables VDISCARD while it is active. | |
1880 | ||
1881 | v. Fixed a problem with exiting bracketed paste mode on terminals that assume | |
1882 | the bracketed paste mode character sequence contains visible characters. | |
1883 | ||
1884 | w. Fixed a bug that could cause a key binding command to refer to an | |
1885 | uninitialized variable. | |
1886 | ||
1887 | 3. New Features in Bash | |
1888 | ||
1889 | a. The `wait' builtin can now wait for the last process substitution created. | |
1890 | ||
1891 | b. There is an EPOCHSECONDS variable, which expands to the time in seconds | |
1892 | since the Unix epoch. | |
1893 | ||
1894 | c. There is an EPOCHREALTIME variable, which expands to the time in seconds | |
1895 | since the Unix epoch with microsecond granularity. | |
1896 | ||
1897 | d. New loadable builtins: rm, stat, fdflags. | |
1898 | ||
1899 | e. BASH_ARGV0: a new variable that expands to $0 and sets $0 on assignment. | |
1900 | ||
1901 | f. When supplied a numeric argument, the shell-expand-line bindable readline | |
1902 | command does not perform quote removal and suppresses command and process | |
1903 | substitution. | |
1904 | ||
1905 | g. `history -d' understands negative arguments: negative arguments offset from | |
1906 | the end of the history list. | |
1907 | ||
1908 | h. The `name' argument to the `coproc' reserved word now undergoes word | |
1909 | expansion, so unique coprocs can be created in loops. | |
1910 | ||
1911 | i. A nameref name resolution loop in a function now resolves to a variable by | |
1912 | that name in the global scope. | |
1913 | ||
8868edaf | 1914 | j. The `wait' builtin now has a `-f' option, which signifies to wait until the |
d233b485 CR |
1915 | specified job or process terminates, instead of waiting until it changes |
1916 | state. | |
1917 | ||
1918 | k. There is a define in config-top.h that allows the shell to use a static | |
1919 | value for $PATH, overriding whatever is in the environment at startup, for | |
1920 | use by the restricted shell. | |
1921 | ||
1922 | l. Process substitution does not inherit the `v' option, like command | |
1923 | substitution. | |
1924 | ||
1925 | m. If a non-interactive shell with job control enabled detects that a foreground | |
1926 | job died due to SIGINT, it acts as if it received the SIGINT. | |
1927 | ||
1928 | n. The SIGCHLD trap is run once for each exiting child process even if job | |
1929 | control is not enabled when the shell is in Posix mode. | |
1930 | ||
1931 | o. A new shopt option: localvar_inherit; if set, a local variable inherits the | |
1932 | value of a variable with the same name at the nearest preceding scope. | |
1933 | ||
1934 | p. `bind -r' now checks whether a key sequence is bound before binding it to | |
1935 | NULL, to avoid creating keymaps for a multi-key sequence. | |
1936 | ||
1937 | q. A numeric argument to the line editing `operate-and-get-next' command | |
1938 | specifies which history entry to use. | |
1939 | ||
1940 | r. The positional parameters are now assigned before running the shell startup | |
1941 | files, so startup files can use $@. | |
1942 | ||
1943 | s. There is a compile-time option that forces the shell to disable the check | |
1944 | for an inherited OLDPWD being a directory. | |
1945 | ||
1946 | t. The `history' builtin can now delete ranges of history entries using | |
1947 | `-d start-end'. | |
1948 | ||
1949 | u. The `vi-edit-and-execute-command' bindable readline command now puts readline | |
1950 | back in vi insertion mode after executing commands from the edited file. | |
1951 | ||
1952 | v. The command completion code now matches aliases and shell function names | |
1953 | case-insensitively if the readline completion-ignore-case variable is set. | |
1954 | ||
1955 | w. There is a new `assoc_expand_once' shell option that attempts to expand | |
1956 | associative array subscripts only once. | |
1957 | ||
1958 | x. The shell only sets up BASH_ARGV and BASH_ARGC at startup if extended | |
1959 | debugging mode is active. The old behavior of unconditionally setting them | |
1960 | is available as part of the shell compatibility options. | |
1961 | ||
1962 | y. The `umask' builtin now allows modes and masks greater than octal 777. | |
1963 | ||
1964 | z. The `times' builtin now honors the current locale when printing a decimal | |
1965 | point. | |
1966 | ||
1967 | aa. There is a new (disabled by default, undocumented) shell option to enable | |
1968 | and disable sending history to syslog at runtime. | |
1969 | ||
1970 | 4. New Features in Readline | |
1971 | ||
1972 | a. Non-incremental vi-mode search (`N', `n') can search for a shell pattern, as | |
1973 | Posix specifies (uses fnmatch(3) if available). | |
1974 | ||
1975 | b. There are new `next-screen-line' and `previous-screen-line' bindable | |
1976 | commands, which move the cursor to the same column in the next, or previous, | |
1977 | physical line, respectively. | |
1978 | ||
1979 | c. There are default key bindings for control-arrow-key key combinations. | |
1980 | ||
1981 | d. A negative argument (-N) to `quoted-insert' means to insert the next N | |
1982 | characters using quoted-insert. | |
1983 | ||
1984 | e. New public function: rl_check_signals(), which allows applications to | |
1985 | respond to signals that readline catches while waiting for input using | |
1986 | a custom read function. | |
1987 | ||
1988 | f. There is new support for conditionally testing the readline version in an | |
1989 | inputrc file, with a full set of arithmetic comparison operators available. | |
1990 | ||
1991 | g. There is a simple variable comparison facility available for use within an | |
1992 | inputrc file. Allowable operators are equality and inequality; string | |
1993 | variables may be compared to a value; boolean variables must be compared to | |
1994 | either `on' or `off'; variable names are separated from the operator by | |
1995 | whitespace. | |
1996 | ||
1997 | ------------------------------------------------------------------------------ | |
a0c0a00f CR |
1998 | This document details the changes between this version, bash-4.4-release, and |
1999 | the previous version, bash-4.4-rc2. | |
2000 | ||
2001 | 1. Changes to Bash | |
2002 | ||
2003 | a. Fixed a bug that could potentially result in a crash due to an integer | |
2004 | overflow. | |
2005 | ||
2006 | b. Fixed a bug in where commands printed due to `set -x' could be incorrectly | |
2007 | quoted if being printed in contexts where they haven't yet been expanded. | |
2008 | ||
2009 | c. Fixed several memory leaks. | |
2010 | ||
2011 | d. Fixed a bug that could potentially cause the terminal attributes to be | |
2012 | set incorrectly by a command run from a programmable completion. | |
2013 | ||
2014 | e. Fixed several potential buffer overflow issues in the word expansion code. | |
2015 | ||
2016 | 2. Changes to Readline | |
2017 | ||
2018 | 3. New Features in Bash | |
2019 | ||
2020 | 4. New Features in Readline | |
a0c0a00f CR |
2021 | ------------------------------------------------------------------------------ |
2022 | This document details the changes between this version, bash-4.4-rc2, and | |
2023 | the previous version, bash-4.4-beta2. | |
2024 | ||
2025 | 1. Changes to Bash | |
2026 | ||
2027 | a. Fixed an out-of-bounds read in the redirection operator completion code. | |
2028 | ||
2029 | b. Fixed execution context so `until continue' doesn't disable execution for | |
2030 | subsequent commands. | |
2031 | ||
2032 | c. Fixed trap handling code so traps don't inherit a command's temporary | |
2033 | environment. | |
2034 | ||
2035 | d. Fixed a bug that resulted in incorrect line numbers when a function is | |
2036 | defined as part of another function's execution. | |
2037 | ||
2038 | e. Fixed a bug in the expansion of ${a[@]} in contexts where word splitting | |
2039 | is not performed and $IFS is not the default. | |
2040 | ||
2041 | f. Fixed a bug that caused ''"$@" to not expand to an empty argument when | |
2042 | there are no positional parameters. | |
2043 | ||
2044 | g. Fixed a bug that caused a shell compiled without job control to use the | |
2045 | incorrect exit status for builtin commands preceded by a command executed | |
2046 | from the file system that causes the shell to call waitpid(). | |
2047 | ||
2048 | h. Improved word completion for quoted strings containing unterminated command | |
2049 | substitutions with embedded double quotes. | |
2050 | ||
2051 | 2. Changes to Readline | |
2052 | ||
2053 | a. Fixed a bug that caused mode strings to be displayed incorrectly if the | |
2054 | prompt was shorter than the mode string. | |
2055 | ||
2056 | 3. New Features in Bash | |
2057 | ||
2058 | a. Using ${a[@]} or ${a[*]} with an array without any assigned elements when | |
2059 | the nounset option is enabled no longer throws an unbound variable error. | |
2060 | ||
2061 | 4. New Features in Readline | |
2062 | ||
2063 | a. New application-callable function: rl_pending_signal(): returns the signal | |
2064 | number of any signal readline has caught but not yet handled. | |
2065 | ||
2066 | b. New application-settable variable: rl_persistent_signal_handlers: if set | |
2067 | to a non-zero value, readline will enable the readline-6.2 signal handler | |
2068 | behavior in callback mode: handlers are installed when | |
2069 | rl_callback_handler_install is called and removed removed when a complete | |
2070 | line has been read. | |
2071 | ||
2072 | ------------------------------------------------------------------------------ | |
2073 | This document details the changes between this version, bash-4.4-beta2, and | |
2074 | the previous version, bash-4.4-rc1. | |
2075 | ||
2076 | 1. Changes to Bash | |
2077 | ||
2078 | a. Fixed a memory leak when processing ${!var[@]}. | |
2079 | ||
2080 | b. Fixed a bug that caused subshells to free trap strings associated with | |
2081 | inherited signals. | |
2082 | ||
2083 | c. Inheriting BASHOPTS from the environment now works to force actions | |
2084 | associated with enabling an option, instead of just marking the option | |
2085 | as enabled. | |
2086 | ||
2087 | d. Fixed a bug that allowed assignments to BASH_CMDS when the shell was in | |
2088 | restricted mode. | |
2089 | ||
2090 | e. Fixed a bug caused by an accidental omission of part of the original patch | |
2091 | for EXECIGNORE. | |
2092 | ||
2093 | e. Prompt expansion now quotes the results of the \s, \h, and \H expansions. | |
2094 | ||
2095 | f. Fixed a bug that caused parsing errors in command substitutions with | |
2096 | consecutive case statements separated by newlines. | |
2097 | ||
2098 | g. Updated logic used to decide whether bash is running inside an emacs | |
2099 | terminal emulator to work with future emacs versions. | |
2100 | ||
2101 | h. Fixed two extended pattern matching bugs caused by premature short- | |
2102 | circuiting. | |
2103 | ||
2104 | i. Fixed a memory leak in the code that removes duplicate history entries. | |
2105 | ||
2106 | j. There are a number of bug fixes to coproc, mapfile, declare, unset, | |
2107 | and assignment statements that prevent nameref variables from creating | |
2108 | and unsetting variables with invalid names. | |
2109 | ||
2110 | k. Fixed a bug that caused variables to be inadvertently marked as both an | |
2111 | associative and an indexed array. | |
2112 | ||
2113 | l. Fixed a bug that caused `bash -c' to not run a trap specified in the | |
2114 | command string. | |
2115 | ||
2116 | j. There are a number of bug fixes to coproc, mapfile, declare, and assignment | |
2117 | statements that prevent nameref variables from overwriting or modifying | |
2118 | attributes of readonly variables. | |
2119 | ||
2120 | k. Fixed a bug that caused command substitution to attempt to set the | |
2121 | terminal's process group incorrectly. | |
2122 | ||
2123 | l. Fixed a bug that could cause prompt string expansion to display error | |
2124 | messages when the `nounset' shell option is set. | |
2125 | ||
2126 | m. Fixed a bug that caused "$@" to not expand to an empty string under the | |
2127 | circumstances when Posix says it should ("${@-${@-$@}}"). | |
2128 | ||
2129 | n. Fixed several bugs caused by referencing nameref variables whose values | |
2130 | are names of unset variables (or names that are valid for referencing | |
2131 | but not assignment), including creating variables in the temporary | |
2132 | environment. | |
2133 | ||
2134 | o. Function tracing and error tracing are disabled if --debugger is supplied | |
2135 | at startup but the shell can't find the debugger start file. | |
2136 | ||
2137 | p. Fixed a bug when IFS is used as the control variable in a for statement. | |
2138 | ||
2139 | q. Fixed a bug with SIGINT received by a command substitution in an interactive | |
2140 | shell. | |
2141 | ||
2142 | r. The checks for nameref variable self-references are more thorough. | |
2143 | ||
2144 | s. Fixed several bugs with multi-line aliases. | |
2145 | ||
2146 | t. Fixed `test' to handle the four-argument case where $1 == '(' and | |
2147 | $4 == ')'. | |
2148 | ||
2149 | u. Fixed a bug in the expansion of $* in the cases where word splitting is | |
2150 | not performed. | |
2151 | ||
2152 | v. Fixed a bug in execution of case statements where IFS includes the | |
2153 | pattern matching characters. | |
2154 | ||
2155 | 2. Changes to Readline | |
2156 | ||
2157 | a. When refreshing the line as the result of a key sequence, Readline attempts | |
2158 | to redraw only the last line of a multiline prompt. | |
2159 | ||
2160 | b. Fixed an issue that caused completion of git commands to display | |
2161 | incorrectly when using colored-completion-prefix. | |
2162 | ||
2163 | c. Fixed several redisplay bugs having to do with multibyte characters and | |
2164 | invisible characters in prompt strings. | |
2165 | ||
2166 | 3. New Features in Bash | |
2167 | ||
2168 | a. Value conversions (arithmetic expansions, case modification, etc.) now | |
2169 | happen when assigning elements of an array using compound assignment. | |
2170 | ||
2171 | b. There is a new option settable in config-top.h that makes multiple | |
2172 | directory arguments to `cd' a fatal error. | |
2173 | ||
2174 | c. Bash now uses mktemp() when creating internal temporary files; it produces | |
2175 | a warning at build time on many Linux systems. | |
2176 | ||
2177 | 4. New Features in Readline | |
2178 | ||
2179 | a. The default binding for ^W in vi mode now uses word boundaries specified | |
2180 | by Posix (vi-unix-word-rubout is bindable command name). | |
2181 | ||
2182 | b. rl_clear_visible_line: new application-callable function; clears all | |
2183 | screen lines occupied by the current visible readline line. | |
2184 | ||
2185 | c. rl_tty_set_echoing: application-callable function that controls whether | |
2186 | or not readline thinks it is echoing terminal output. | |
2187 | ||
2188 | d. Handle >| and strings of digits preceding and following redirection | |
2189 | specifications as single tokens when tokenizing the line for history | |
2190 | expansion. | |
2191 | ||
2192 | e. Fixed a bug with displaying completions when the prefix display length | |
2193 | is greater than the length of the completions to be displayed. | |
2194 | ||
2195 | f. The :p history modifier now applies to the entire line, so any expansion | |
2196 | specifying :p causes the line to be printed instead of expanded. | |
2197 | ||
2198 | ------------------------------------------------------------------------------ | |
2199 | This document details the changes between this version, bash-4.4-rc1, and | |
2200 | the previous version, bash-4.4-beta. | |
2201 | ||
2202 | 1. Changes to Bash | |
2203 | ||
2204 | a. Fixed several problems with bash completion not special-casing bash syntax | |
2205 | constructs. | |
2206 | ||
2207 | b. Fixed a bug that caused the mapfile builtin to not create array variables | |
2208 | when a variable of the same name appears in the temporary environment. | |
2209 | ||
2210 | c. Fixed a bug that caused prompt expansion to loop when PS1 contained a | |
2211 | syntax error. | |
2212 | ||
2213 | d. Fixed a bug that caused the ${array[@]@A} expansion to split the results | |
2214 | even when double-quoted. | |
2215 | ||
2216 | e. There is a new implementation of the code that saves the last CHILD_MAX | |
2217 | exited background pids so their status can be queried later. | |
2218 | ||
2219 | f. Bash-4.4 can now be configured and built on very old versions of Solaris 2. | |
2220 | ||
2221 | g. Fixed problems with --help support for several builtins. | |
2222 | ||
2223 | h. Fixed values added to BASH_SOURCE and BASH_LINENO for functions inherited | |
2224 | from the environment. | |
2225 | ||
2226 | i. Fixed a bug that caused background processes run from non-interactive shells | |
2227 | with job control enabled to place the terminal in the wrong process group | |
2228 | under certain circumstances. | |
2229 | ||
2230 | j. Fixed a bug that caused `fc' to return an incorrect exit status when | |
2231 | executing commands from the history list. | |
2232 | ||
2233 | k. Fixed a bug that caused the shell to exit when a process substitution | |
2234 | received a SIGINT when run in certain terminal emulators. | |
2235 | ||
2236 | l. EXECIGNORE now honors the setting of `extglob' when attempting to match | |
2237 | executable names. | |
2238 | ||
2239 | m. Fixed a bug where `return' used the wrong exit status when executed in a | |
2240 | DEBUG trap. | |
2241 | ||
2242 | n. Fixed a bug that caused a command containing a here-document and an escaped | |
2243 | newline to be stored in the history list incorrectly. | |
2244 | ||
2245 | o. Fixed a bug that caused set -e to be honored in cases of builtins invoking | |
2246 | other builtins when it should be ignored. | |
2247 | ||
2248 | p. Fixed a bug that caused `readonly' and `export' to create local array | |
2249 | variables when used within shell functions. | |
2250 | ||
2251 | q. Fixed a bug that allowed subshells begun to execute process substitutions | |
2252 | to have access to the command's temporary environment. | |
2253 | ||
2254 | r. Fixed a bug that could cause the shell to dump core when receiving a | |
2255 | SIGCHLD for which a trap has been set while running in posix mode. | |
2256 | ||
2257 | s. Fixed a bug that caused bash to not restore BASH_ARGC, BASH_ARGV, | |
2258 | BASH_SOURCE, BASH_LINENO, and FUNCNAME if the shell received a SIGINT | |
2259 | while reading commands from a file while executing `.'. | |
2260 | ||
2261 | t. Fixed a bug that caused the `-o history' option to have no effect when | |
2262 | supplied on the command line when starting a new shell. | |
2263 | ||
2264 | u. Fixed a bug that caused history expansions occurring in command | |
2265 | substitutions to not be performed. | |
2266 | ||
2267 | v. Fixed a bug that caused `eval' run in a non-interactive shell to disable | |
2268 | history expansion for the remainder of the shell script, even if the script | |
2269 | had previously enabled it. | |
2270 | ||
2271 | w. Fixed a bug that caused "$@" to not expand to multiple words when IFS is set | |
2272 | to the empty string. | |
2273 | ||
2274 | x. Fixed a bug that caused process and command substitution to inherit output | |
2275 | buffered in the stdio library but not written. | |
2276 | ||
2277 | y. Fixed a bug that caused a terminating signal received during `echo' to run | |
2278 | an exit trap in a signal handler context. | |
2279 | ||
2280 | z. Fixed a bug that caused a builtin command containing a process substitution | |
2281 | to return the wrong exit status. | |
2282 | ||
2283 | aa. Fixed a bug that caused `()' subshells with piped input to incorrectly | |
2284 | redirect the standard input of some of the commands in the subshell from | |
2285 | /dev/null. | |
2286 | ||
2287 | bb. The history builtin now uses more descriptive error messages for missing or | |
2288 | invalid timestamps. | |
2289 | ||
2290 | 2. Changes to Readline | |
2291 | ||
2292 | a. The history file writing functions only attempt to create and use a backup | |
2293 | history file if the history file exists and is a regular file. | |
2294 | ||
2295 | b. Fixed an out-of-bounds read in readline's internal tilde expansion | |
2296 | interface. | |
2297 | ||
2298 | c. Fixed several redisplay bugs with prompt strings containing multibyte | |
2299 | and non-visible characters whose physical length is longer than the screen | |
2300 | width. | |
2301 | ||
2302 | d. Fixed a redisplay bug with prompt strings containing invisible characters | |
2303 | whose physical length exceeds the screen width and using incremental search. | |
2304 | ||
2305 | e. Readline prints more descriptive error messages when it encounters errors | |
2306 | while reading an inputrc file. | |
2307 | ||
2308 | f. Fixed a bug in the character insertion code that attempts to optimize | |
2309 | typeahead when it reads a character that is not bound to self-insert and | |
2310 | resets the key sequence state. | |
2311 | ||
2312 | 3. New Features in Bash | |
2313 | ||
2314 | a. BASH_COMPAT and FUNCNEST can be inherited and set from the shell's initial | |
2315 | environment. | |
2316 | ||
2317 | b. inherit_errexit: a new `shopt' option that, when set, causes command | |
2318 | substitutions to inherit the -e option. By default, those subshells disable | |
2319 | -e. It's enabled as part of turning on posix mode. | |
2320 | ||
2321 | c. New prompt string: PS0. Expanded and displayed by interactive shells after | |
2322 | reading a complete command but before executing it. | |
2323 | ||
2324 | d. Interactive shells now behave as if SIGTSTP/SIGTTIN/SIGTTOU are set to | |
2325 | SIG_DFL when the shell is started, so they are set to SIG_DFL in child | |
2326 | processes. | |
2327 | ||
2328 | e. Posix-mode shells now allow double quotes to quote the history expansion | |
2329 | character. | |
2330 | ||
2331 | f. OLDPWD can be inherited from the environment if it names a directory. | |
2332 | ||
2333 | g. Shells running as root no longer inherit PS4 from the environment, closing | |
2334 | a security hole involving PS4 expansion performing command substitution. | |
2335 | ||
2336 | h. If executing an implicit `cd' when the `autocd' option is set, bash will | |
2337 | now invoke a function named `cd' if one exists before executing the `cd' | |
2338 | builtin. | |
2339 | ||
2340 | 4. New Features in Readline | |
2341 | ||
2342 | a. If an incremental search string has its last character removed with DEL, | |
2343 | the resulting empty search string no longer matches the previous line. | |
2344 | ||
2345 | b. If readline reads a history file that begins with `#' (or the value of | |
2346 | the history comment character) and has enabled history timestamps, the | |
2347 | history entries are assumed to be delimited by timestamps. This allows | |
2348 | multi-line history entries. | |
2349 | ||
2350 | c. Readline now throws an error if it parses a key binding without a | |
2351 | terminating `:' or whitespace. | |
2352 | ||
2353 | ------------------------------------------------------------------------------ | |
2354 | This document details the changes between this version, bash-4.4-beta, and | |
2355 | the previous version, bash-4.4-alpha. | |
2356 | ||
2357 | 1. Changes to Bash | |
2358 | ||
2359 | a. Fixed two bugs that caused out-of-bounds reads when skipping over assignment | |
2360 | statements while finding the word on which to perform programmable | |
2361 | completion. | |
2362 | ||
2363 | b. Fixed a memory leak in programmable completion. | |
2364 | ||
2365 | c. Fixed a bug that could cause the shell to crash when interrupting the | |
2366 | wait builtin. | |
2367 | ||
2368 | d. Fixed a bug that caused ${!vvv@} to be interpreted as introducing the new | |
2369 | `@' operator. | |
2370 | ||
2371 | e. Fixed a bug that caused the && and || operators to be incorrectly optimized. | |
2372 | ||
2373 | f. The shell now undoes redirections before exiting the shell when the `-e' | |
2374 | option is enabled, and a shell function fails. | |
2375 | ||
2376 | g. History expansion now skips over the history expansion character in command | |
2377 | and process substitution. | |
2378 | ||
2379 | h. Fixed a bug that caused stray '\001' characters to be added to the output | |
2380 | of `declare -p'. | |
2381 | ||
2382 | i. Fixed a memory leak when processing declare commands that perform compound | |
2383 | array assignments. | |
2384 | ||
2385 | j. Fixed a bug that could cause the shell to crash when reading input from a | |
2386 | file and the limit on open file descriptors is high. | |
2387 | ||
2388 | k. Fixed a bug that caused the ERR and RETURN traps to be unset if they were | |
2389 | set in a shell function but unset previously. | |
2390 | ||
2391 | l. Fixed a bug that caused several signals to be ignored if `exec' failed in | |
2392 | an interactive shell. | |
2393 | ||
2394 | m. A posix-mode non-interactive shell now considers a parameter expansion error | |
2395 | to be a fatal error. | |
2396 | ||
2397 | n. The `time' command now prints timing statistics for failed commands when | |
2398 | the -e option is enabled. | |
2399 | ||
2400 | o. Fixed a bug that caused the shell to crash when attempting to indirectly | |
2401 | expand a shell variable with an invalid name. | |
2402 | ||
2403 | p. Fixed a bug that caused the shell to crash when running a trap containing | |
2404 | a process substitution. | |
2405 | ||
2406 | q. Bash now prints the keyword `function' before a function with the same name | |
2407 | as a reserved word when using `declare -f' to avoid parse errors when | |
2408 | reusing the output as input. | |
2409 | ||
2410 | r. Fixed a bug that caused the shell to crash when using declare -g to attempt | |
2411 | to redefine an existing global indexed array variable as an associative | |
2412 | array. | |
2413 | ||
2414 | s. Fixed a memory leak that occurred when interrupting brace expansions | |
2415 | generating a sequence. | |
2416 | ||
2417 | t. Fixed a bug that resulted in alias expansion in redirections. | |
2418 | ||
2419 | u. The `declare -a' and `declare -A' commands now print fewer warnings when | |
2420 | attempting to create and initialize an array at the same time, but | |
2421 | relying on word expansions to construct the compound assignment. | |
2422 | ||
2423 | v. The `help' builtin now behaves better in locales where each wide | |
2424 | character occupies more than one display column. | |
2425 | ||
2426 | w. The `read' builtin no longer has a possible race condition when a timeout | |
2427 | occurs. | |
2428 | ||
2429 | x. Fixed several expansion problems encountered when IFS="'". | |
2430 | ||
2431 | y. Fixed a problem with the expansion of $'\c?'. | |
2432 | ||
2433 | z. Bash no longer splits the expansion of here-strings, as the documentation | |
2434 | has always said. | |
2435 | ||
2436 | aa. Bash now puts `s' in the value of $- if the shell is reading from standard | |
2437 | input, as Posix requires. | |
2438 | ||
2439 | bb. Fixed a bug that caused the shell to crash if invoked with a NULL | |
2440 | environment. | |
2441 | ||
2442 | cc. The shell now only trusts an inherited value for $PWD if it begins with a | |
2443 | `/'. | |
2444 | ||
2445 | dd. Fixed a memory leak when creating local array variables and assigning to | |
2446 | them using compound assignment with the `declare' builtin. | |
2447 | ||
2448 | ee. Fixed a bug that could cause the shell to crash when processing nested here | |
2449 | documents inside a command substitution. | |
2450 | ||
2451 | ff. Array keys and values are now displayed using $'...' quoting where | |
2452 | appropriate. | |
2453 | ||
2454 | gg. Fixed a bug that could cause the shell to crash if the replacement string | |
2455 | in pattern substitution was NULL. | |
2456 | ||
2457 | hh. Fixed a bug that could cause the shell to crash if a command substitution | |
2458 | contained a non-fatal syntax error. | |
2459 | ||
2460 | ii. Fixed a bug that could cause the shell to crash if variable indirection | |
2461 | resulted in a NULL variable. | |
2462 | ||
2463 | jj. Fixed a bug that could cause the shell to crash if a long string contained | |
2464 | multiple unterminated parameter expansion constructs. | |
2465 | ||
2466 | kk. Improved the code that acts on SIGINT received while waiting for a child | |
2467 | process only if the child exits due to SIGINT. | |
2468 | ||
2469 | ll. $BASH_SUBSHELL now has more consistent values in asynchronous simple | |
2470 | commands. | |
2471 | ||
2472 | 2. Changes to Readline | |
2473 | ||
2474 | a. Colored completion prefixes are now displayed using a different color, less | |
2475 | likely to collide with files. | |
2476 | ||
2477 | b. Fixed a bug that caused vi-mode character search to misbehave when | |
2478 | running in callback mode. | |
2479 | ||
2480 | c. Fixed a bug that caused output to be delayed when input is coming from a | |
2481 | macro in vi-mode. | |
2482 | ||
2483 | d. Fixed a bug that caused the vi-mode `.' command to misbehave when redoing | |
2484 | a multi-key key sequence via a macro. | |
2485 | ||
2486 | e. Fixed a bug that caused problems with applications that supply their own | |
2487 | input function when performing completion. | |
2488 | ||
2489 | f. When read returns -1/EIO when attempting to read a key, return an error | |
2490 | instead of line termination back to the caller. | |
2491 | ||
2492 | g. Updated tty auditing feature based on patch from Red Hat. | |
2493 | ||
2494 | h. Fixed a bug that could cause the history library to crash on overflows | |
2495 | introduced by malicious editing of timestamps in the history file. | |
2496 | ||
2497 | 3. New Features in Bash | |
2498 | ||
2499 | a. `make install' now installs the example loadable builtins and a set of | |
2500 | bash headers to use when developing new loadable builtins. | |
2501 | ||
2502 | b. `enable -f' now attempts to call functions named BUILTIN_builtin_load when | |
2503 | loading BUILTIN, and BUILTIN_builtin_unload when deleting it. This allows | |
2504 | loadable builtins to run initialization and cleanup code. | |
2505 | ||
2506 | c. There is a new BASH_LOADABLES_PATH variable containing a list of directories | |
2507 | where the `enable -f' command looks for shared objects containing loadable | |
2508 | builtins. | |
2509 | ||
2510 | d. The `complete_fullquote' option to `shopt' changes filename completion to | |
2511 | quote all shell metacharacters in filenames and directory names. | |
2512 | ||
2513 | e. The `kill' builtin now has a `-L' option, equivalent to `-l', for | |
2514 | compatibility with Linux standalone versions of kill. | |
2515 | ||
2516 | 4. New Features in Readline | |
2517 | ------------------------------------------------------------------------------ | |
2518 | This document details the changes between this version, bash-4.4-alpha, and | |
2519 | the previous version, bash-4.3-release. | |
2520 | ||
2521 | 1. Changes to Bash | |
2522 | ||
2523 | a. A bug that caused pipelines to be corrupted while running the DEBUG trap | |
2524 | was fixed. | |
2525 | ||
2526 | b. A bug that accidentally omitted the `-R' unary operator from `test' was | |
2527 | fixed. | |
2528 | ||
2529 | c. A bug that could cause the shell to not restore the terminal's process | |
2530 | group on shell exit was fixed. | |
2531 | ||
2532 | d. Several changes were made to programmable completion to accommodate | |
2533 | assumptions made by the bash-completion package. | |
2534 | ||
2535 | e. Bash no longer inhibits C-style escape processing ($'...') while performing | |
2536 | pattern substitution word expansions. | |
2537 | ||
2538 | f. Fixed a bug that caused `return' executed from a trap handler to use the | |
2539 | wrong return status when one was not supplied as an argument. | |
2540 | ||
2541 | g. In Posix mode, defining a function with the same name as a special | |
2542 | builtin is now an error, fatal only when the shell is not interactive. | |
2543 | ||
2544 | h. Fixed a bug that caused compound array assignments to discard unset or null | |
2545 | variables used as subscripts, thereby making it appear as if the index was | |
2546 | not present. | |
2547 | ||
2548 | i. Fixed a bug that caused extended glob patterns to incorrectly match | |
2549 | filenames with a leading `.'. | |
2550 | ||
2551 | j. Fixed a bug involving sign extension when reallocating the input line | |
2552 | after a history expansion, causing segmentation faults. | |
2553 | ||
2554 | k. Bash now does a better job at identifying syntax errors during word | |
2555 | completion and tailoring completion appropriately. | |
2556 | ||
8868edaf | 2557 | l. Bash now uses the current locale's decimal point in command timing output. |
a0c0a00f CR |
2558 | |
2559 | m. Fixed a bug that caused segmentation faults while reading here documents if | |
2560 | PS2 contains a command substitution. | |
2561 | ||
2562 | n. There are several changes to how $@ is expanded when unquoted but in a | |
2563 | context where word splitting is not performed (e.g., on the rhs of an | |
2564 | assignment or in a conditional command). | |
2565 | ||
2566 | o. Bash now quotes command hash table entries that contain shell metacharacters | |
2567 | when displaying hash table contents. | |
2568 | ||
2569 | p. Fixed a potential file descriptor leak when dup2() fails while performing a | |
2570 | redirection. | |
2571 | ||
2572 | q. Fixed a bug that caused directory names evaluated during word completion to | |
2573 | be dequoted twice. | |
2574 | ||
2575 | r. Fixed several bugs which could result in indirect variable expansion and | |
2576 | namerefs creating variables with invalid names or referencing variables | |
2577 | set to the empty string. | |
2578 | ||
2579 | s. Fixed a bug that caused bash to not expand $0 in word expansions where it | |
2580 | should. | |
2581 | ||
2582 | t. Fixed a bug that caused bash to perform process substitution if <( | |
2583 | appeared inside an arithmetic context. | |
2584 | ||
2585 | u. Fixed a bug in extglob pattern parsing that caused slashes in the pattern | |
2586 | to be confused as directory names. | |
2587 | ||
2588 | v. Fixed several bugs with treatment of invisible variables (variables with | |
2589 | attributes that are unset because they have never been assigned values). | |
2590 | ||
2591 | w. Fixed a bug that caused the `read' builtin to not clean up readline's | |
2592 | state when using the -e and -t options together and the read timed out. | |
2593 | ||
2594 | x. Fixed a bug that caused the shell to exit with the wrong (but non-zero) | |
2595 | value if a command was not found or was not executable. | |
2596 | ||
2597 | y. Fixed a bug that caused the `time' reserved word to not be recognized as | |
2598 | such in all contexts where it should have been. | |
2599 | ||
8868edaf | 2600 | z. Fixed a bug that caused the shell to close process substitution file |
a0c0a00f CR |
2601 | descriptors when executing a script without the `#!' leading line. |
2602 | ||
2603 | aa. Fixed a typo that caused the `compat42' shell option to set the wrong | |
2604 | compatibility level. | |
2605 | ||
2606 | bb. The shell now handles process substitution commands with embedded | |
2607 | parentheses the same way as it does when parsing command substitution. | |
2608 | ||
2609 | cc. Fixed a bug that caused nested pipelines and the `lastpipe' shell option | |
2610 | to produce core dumps. | |
2611 | ||
2612 | dd. Fixed a bug that caused patterns containing `*' to match pathnames in cases | |
2613 | where slashes must be matched explicitly. | |
2614 | ||
2615 | ee. Fixed a problem with patterns containing `:' in colon-separated variables | |
2616 | like GLOBIGNORE. | |
2617 | ||
2618 | ff. Fixed a bug that caused indirect variable expansion using indexed arrays to | |
2619 | always use index 0. | |
2620 | ||
2621 | gg. Fixed a parsing problem that caused quoted newlines immediately following a | |
2622 | command substitution to be mishandled in certain cases. | |
2623 | ||
2624 | hh. Fixed a potential buffer overflow on systems without locale_charset or the | |
2625 | bash replacement. | |
2626 | ||
2627 | ii. Fixed a bug that caused background processes to modify the terminal's | |
2628 | process group under certain circumstances. | |
2629 | ||
2630 | jj. Asynchronous commands now always set $? to 0 and are not affected by | |
2631 | whether or not the command's exit status is being inverted. | |
2632 | ||
2633 | kk. Fixed a problem that caused a line ending with an escaped newline and | |
2634 | containingh a prior `eval' to be incorrectly parsed. | |
2635 | ||
2636 | ll. Fixed an issue with programmable completion and `!' in extglob patterns | |
2637 | used as arguments to `compgen -X'. | |
2638 | ||
2639 | mm. Word completion now treats the two-character token `>|' as requiring | |
2640 | filename expansion. | |
2641 | ||
2642 | nn. Bash no longer expands tildes in $PATH elements while in Posix mode. | |
2643 | ||
2644 | oo. Fixed a bug that caused bash to not clean up readline's state, including | |
2645 | the terminal settings, if it received a fatal signal while in a readline() | |
2646 | call (including `read -e' and `read -s'). | |
2647 | ||
2648 | pp. Fixed bug that caused importing shell functions from the environment to | |
2649 | execute additional commands following the function. | |
2650 | ||
2651 | qq. Fixed a bug that caused the parser to return a lookahead character pushed | |
2652 | back by a previous call, even when on another line. | |
2653 | ||
2654 | rr. Fixed a bug that caused many here-documents or many nested case statements | |
2655 | to overflow an internal stack. | |
2656 | ||
2657 | ss. Changed the way bash encodes exported functions for inclusion in the | |
2658 | environment to avoid name collisions with valid variable names and to | |
2659 | indicate that they are exported functions. | |
2660 | ||
2661 | tt. Fixed a bug that could result in an invalid memory access when processing | |
2662 | a here document delimited by end of file or end of string. | |
2663 | ||
2664 | uu. Fixed a bug that could cause an invalid memory access if a command was run | |
2665 | before initializing the job control framework. | |
2666 | ||
2667 | vv. When in Posix mode, bash prints shell function definitions as Posix | |
2668 | specifies them, without the leading `function' keyword. | |
2669 | ||
2670 | ww. The variable attribute display builtins no longer display variables with | |
2671 | invalid names that were imported from the environment. | |
2672 | ||
2673 | xx. Fixed a bug that could allow `break' or `continue' executed from shell | |
2674 | functions to affect loops running outside of the function. | |
2675 | ||
2676 | yy. Fixed a bug that could cause a restricted shell to attempt to import shell | |
2677 | functions from the environment. | |
2678 | ||
2679 | zz. The shell now allows double-quoted identifiers in arithmetic expressions. | |
2680 | ||
2681 | aaa. Fixed a bug that could allow scalar variables subscripted using [@] in | |
2682 | word expansions to be incorrectly quoted. | |
2683 | ||
2684 | bbb. The shell now makes sure to ignore SIGTSTP/SIGTTIN/SIGTTOU in child | |
2685 | processes if they were ignored at shell startup, even if job control is | |
2686 | in effect. | |
2687 | ||
2688 | ccc. Fixed a bug that could cause $* to be split on spaces when IFS is set to | |
2689 | the empty string. | |
2690 | ||
2691 | ddd. Posix says that expanding $* in a pattern context where the expansion is | |
2692 | double-quoted should not treat $* as if it were double quoted. | |
2693 | ||
2694 | eee. Bash now restores getopts' internal state between calls to getopts even if | |
2695 | a shell function declares a local copy of OPTIND. | |
2696 | ||
2697 | fff. Fixed a bug that could cause `history -r' or `history -n' to read identical | |
2698 | lines from the history file more than once. | |
2699 | ||
2700 | ggg. The commands executed by `bind -x' now redisplay at most the final line | |
2701 | of a multi-line prompt, and those commands may return 124 to indicate that | |
2702 | the entire prompt should be redrawn. | |
2703 | ||
2704 | hhh. Fixed a bug that could cause `mapfile' to create variables with invalid | |
2705 | names. | |
2706 | ||
2707 | iii. The shell only goes into debugging mode when --debugger is supplied if | |
2708 | the debugger initialization file is present. | |
2709 | ||
2710 | jjj. Fixed a bug that disallowed an assignment to (implicit) subscript 0 of an | |
2711 | existing array in a declare command that set the readonly attribute. | |
2712 | ||
2713 | kkk. Fixed a bug that inadvertently allowed assignments to FUNCNAME to disable | |
2714 | its special status. | |
2715 | ||
2716 | lll. Appending to an existing array variable using the compound assignment | |
2717 | syntax (var+=(aaa)) should not affect assignments to existing subscripts | |
2718 | appearing in the compound assignment. | |
2719 | ||
2720 | mmm. Fixed a bug that could cause the shell to crash when a variable with a | |
2721 | null value was passed in the temporary environment and the variable's | |
2722 | attributes are modified using `declare' while performing a redirection. | |
2723 | ||
2724 | nnn. Fixed a bug in printf so that a missing precision specifier after a `.' | |
2725 | is treated as 0. | |
2726 | ||
2727 | ooo. Fixed a bug that attempted to use the internal command timing to time | |
2728 | pipeline components if the pipeline elements are separated by newlines. | |
2729 | ||
2730 | ppp. Fixed a bug that caused `declare -al foo=(ONE TWO THREE)' to not lowercase | |
2731 | the values on assignment. | |
2732 | ||
2733 | qqq. Bash does a better job of determining whether or not files are executable | |
2734 | when running on Windows, since the X_OK flag to access(2) is not supported. | |
2735 | ||
2736 | rrr. Fixed a bug that caused some of the shell's internal traps (e.g., ERR) to | |
2737 | be interrupted (and leave incorrect state) by pending SIGINTs. | |
2738 | ||
2739 | sss. Fixed a bug in the bash interface to history expansion to avoid attempting | |
2740 | expansion if the history expansion character occurs in a command | |
2741 | substitution. | |
2742 | ||
2743 | ttt. Fixed a bug that caused the select command to crash if the REPLY variable | |
2744 | ends up empty (e.g., if it's made readonly) | |
2745 | ||
2746 | uuu. Bash handles backslash-quoting of multibyte characters better when quoting | |
2747 | output that is intended to be reused. | |
2748 | ||
2749 | vvv. System-specific changes for: Windows, Cygwin. | |
2750 | ||
2751 | www. Fixes for upper and lower-casing multibyte characters, some locales have | |
2752 | characters whose upper and lowercase versions have different numbers of | |
2753 | bytes. | |
2754 | ||
2755 | xxx. Fixed a bug that caused the ERR trap in a shell function to have the | |
2756 | wrong value for $LINENO. | |
2757 | ||
2758 | yyy. Fixed a bug that resulted in incorrect quoting of regexps for the =~ | |
2759 | operator when an open brace appears without a close brace. | |
2760 | ||
2761 | zzz. Fixed a bug in the array unset operation that caused it to attempt to | |
2762 | parse embedded single and double quotes. | |
2763 | ||
2764 | aaaa. Fixed a bug that caused $* to not expand with the first character of | |
2765 | $IFS as a separator in a context where word splitting will not take | |
2766 | place. | |
2767 | ||
2768 | bbbb. Fixed two bugs that could cause the shell to dereference a null pointer | |
2769 | while attempting to print an error message from arithmetic expansion. | |
2770 | ||
2771 | cccc. Fixed a bug that resulted in short-circuited evaluation when reading | |
2772 | commands from a string ending in an unquoted backslash, or when sourcing | |
2773 | a file that ends with an unquoted backslash. | |
2774 | ||
2775 | dddd. Fixed a bug that resulted in the no-fork optimization not cleaning up | |
2776 | any FIFOs created by process substitution. | |
2777 | ||
2778 | eeee. If the -T option is not set, allow the source builtin and shell functions | |
2779 | to set a DEBUG trap that persists after the sourced file or function | |
2780 | returns, instead of restoring the old (unset) value unconditionally. | |
2781 | ||
2782 | ffff. Fixed a bug that caused redirections to not be undone on some syntax | |
2783 | errors, e.g., when parsing a command substitution. | |
2784 | ||
2785 | gggg. Bash only adds asynchronous commands to the table of background pids | |
2786 | whose status it remembers, to avoid it growing too large during scripts | |
2787 | that create and reap large numbers of child processes. This means that | |
2788 | `wait' no longer works on synchronous jobs, but $? can be used to get | |
2789 | the exit status in those cases. | |
2790 | ||
2791 | hhhh. Bash now checks whether or not a shell script argument is a directory | |
2792 | before trying to open it; Posix says implementations may allow open(2) | |
2793 | on a directory. | |
2794 | ||
2795 | iiii. Fixed a bug that could cause the shell to set the terminal's process | |
2796 | group to a background process group when running as part of a pipeline. | |
2797 | ||
2798 | jjjj. Made a few changes to strings to avoid possible potential negative effects | |
2799 | caused by malicious translations. | |
2800 | ||
2801 | kkkk. Fixed a bug that caused the `unset' builtin to continue to treat its | |
2802 | arguments as functions after unsetting a function when invoked with no | |
2803 | options. | |
2804 | ||
2805 | llll. Fixed a bug that would not replace empty strings using pattern | |
2806 | substitution even if the pattern matched the empty string. | |
2807 | ||
2808 | mmmm. Fixed a bug with word completion that prevented some characters from | |
2809 | being backslash-quoted (backquote, dollar sign). | |
2810 | ||
2811 | nnnn. Fixed a bug that prevented a command from the history re-executed by the | |
2812 | `fc' builtin from setting verbose mode. | |
2813 | ||
2814 | oooo. Fixed a bug that caused the shell to not enable and disable function | |
2815 | tracing with changes to the `extdebug' shell option. | |
2816 | ||
2817 | pppp. Fixed a bug that caused assignments to nameref variables pointing to | |
2818 | unset variables with attributes but no values to create variables with | |
2819 | incorrect names. | |
2820 | ||
2821 | qqqq. Fixed a bug that caused `unset' on nameref variables (without -n) to | |
2822 | unset the wrong variable under certain circumstances. | |
2823 | ||
2824 | rrrr. Fixed a bug that caused close braces occurring in brace expansions within | |
2825 | command substitutions to incorrectly terminate parameter expansions. | |
2826 | ||
2827 | ssss. Fixed a bug that caused `command -p' to temporarily alter $PATH. | |
2828 | ||
2829 | tttt. Fixed a bug that caused interactive shells compiled without job control | |
2830 | to return incorrect status values for child processes when running a | |
2831 | single command that creates enough children to use the entire PID space. | |
2832 | ||
2833 | uuuu. `esac' should not be recognized as a reserved word when it appears as the | |
2834 | second or later pattern in a case statement pattern list. | |
2835 | ||
2836 | vvvv. Fixed a bug that caused the completion code to read past the end of the | |
2837 | readline line buffer while skipping assignment statements to find the | |
2838 | command name. | |
2839 | ||
2840 | wwww. Fixed a bug that caused case statements within loops contained in a | |
2841 | command substitution to be parsed incorrectly. | |
2842 | ||
2843 | xxxx. Fixed a bug that could cause SIGCHLD handling to be delayed after | |
2844 | running `wait' with no arguments and interrupting it with ^C without | |
2845 | a trap handler installed. | |
2846 | ||
2847 | 2. Changes to Readline | |
2848 | ||
2849 | a. A bug that caused vi-mode `.' to be unable to redo `c', `d', and `y' | |
2850 | commands with modifiers was fixed. | |
2851 | ||
2852 | b. Fixed a bug that caused callback mode to dump core when reading a | |
2853 | multiple-key sequence (e.g., arrow keys). | |
2854 | ||
2855 | c. Fixed a bug that caused the redisplay code to erase some of the line when | |
2856 | using horizontal scrolling with incremental search. | |
2857 | ||
2858 | d. Readline's input handler now performs signal processing if read(2) is | |
2859 | interrupted by SIGALRM or SIGVTALRM. | |
2860 | ||
2861 | e. Fixed a problem with revert-all-at-newline freeing freed memory. | |
2862 | ||
2863 | f. Clarified the documentation for the history_quotes_inhibit_expansion | |
2864 | variable to note that it inhibits scanning for the history comment | |
2865 | character and that it only affects double-quoted strings. | |
2866 | ||
2867 | g. Fixed an off-by-one error in the prompt printed when performing searches. | |
2868 | ||
2869 | h. Use pselect(2), if available, to wait for input before calling read(2), so | |
2870 | a SIGWINCH can interrupt it, since it doesn't interrupt read(2). | |
2871 | ||
2872 | i. Some memory leaks caused by signals interrupting filename completion have | |
2873 | been fixed. | |
2874 | ||
2875 | j. Reading EOF twice on a non-empty line causes EOF to be returned, rather | |
2876 | than the partial line. This can cause partial lines to be executed on | |
2877 | SIGHUP, for example. | |
2878 | ||
2879 | k. Fixed a bug concerning deleting multibyte characters from the search | |
2880 | string while performing an incremental search. | |
2881 | ||
2882 | l. Fixed a bug with tilde expanding directory names in filename completion. | |
2883 | ||
2884 | m. Fixed a bug that did not allow binding sequences beginning with a `\'. | |
2885 | ||
2886 | n. Fixed a redisplay bug involving incorrect line wrapping when the prompt | |
2887 | contains a multibyte character in the last screen column. | |
2888 | ||
2889 | o. Fixed a bug that caused history expansion to disregard characters that are | |
2890 | documented to delimit a history event specifier without requiring `:'. | |
2891 | ||
2892 | p. Fixed a bug that could cause reading past the end of a string when reading | |
2893 | the value when binding the set of isearch terminators. | |
2894 | ||
2895 | q. Fixed a bug that caused readline commands that depend on knowing which | |
2896 | key invoked them to misbehave when dispatching key sequences that are | |
2897 | prefixes of other key bindings. | |
2898 | ||
2899 | r. Paren matching now works in vi insert mode. | |
2900 | ||
2901 | 3. New Features in Bash | |
2902 | ||
2903 | a. There is now a settable configuration #define that will cause the shell | |
2904 | to exit if the shell is running setuid without the -p option and setuid | |
2905 | to the real uid fails. | |
2906 | ||
2907 | b. Command and process substitutions now turn off the `-v' option when | |
2908 | executing, as other shells seem to do. | |
2909 | ||
2910 | c. The default value for the `checkhash' shell option may now be set at | |
2911 | compile time with a #define. | |
2912 | ||
2913 | d. The `mapfile' builtin now has a -d option to use an arbitrary character | |
2914 | as the record delimiter, and a -t option to strip the delimiter as | |
2915 | supplied with -d. | |
2916 | ||
2917 | e. The maximum number of nested recursive calls to `eval' is now settable in | |
2918 | config-top.h; the default is no limit. | |
2919 | ||
2920 | f. The `-p' option to declare and similar builtins will display attributes for | |
2921 | named variables even when those variables have not been assigned values | |
2922 | (which are technically unset). | |
2923 | ||
2924 | g. The maximum number of nested recursive calls to `source' is now settable | |
2925 | in config-top.h; the default is no limit. | |
2926 | ||
2927 | h. All builtin commands recognize the `--help' option and print a usage | |
2928 | summary. | |
2929 | ||
2930 | i. Bash does not allow function names containing `/' and `=' to be exported. | |
2931 | ||
2932 | j. The `ulimit' builtin has new -k (kqueues) and -P (pseudoterminals) options. | |
2933 | ||
2934 | k. The shell now allows `time ; othercommand' to time null commands. | |
2935 | ||
2936 | l. There is a new `--enable-function-import' configuration option to allow | |
2937 | importing shell functions from the environment; import is enabled by | |
2938 | default. | |
2939 | ||
2940 | m. `printf -v var ""' will now set `var' to the empty string, as if `var=""' | |
2941 | had been executed. | |
2942 | ||
2943 | n. GLOBIGNORE, the pattern substitution word expansion, and programmable | |
2944 | completion match filtering now honor the value of the `nocasematch' option. | |
2945 | ||
2946 | o. There is a new ${parameter@spec} family of operators to transform the | |
2947 | value of `parameter'. | |
2948 | ||
2949 | p. Bash no longer attempts to perform compound assignment if a variable on the | |
2950 | rhs of an assignment statement argument to `declare' has the form of a | |
2951 | compound assignment (e.g., w='(word)' ; declare foo=$w); compound | |
2952 | assignments are accepted if the variable was already declared as an array, | |
2953 | but with a warning. | |
2954 | ||
2955 | q. The declare builtin no longer displays array variables using the compound | |
2956 | assignment syntax with quotes; that will generate warnings when re-used as | |
2957 | input, and isn't necessary. | |
2958 | ||
2959 | r. Executing the rhs of && and || will no longer cause the shell to fork if | |
2960 | it's not necessary. | |
2961 | ||
2962 | s. The `local' builtin takes a new argument: `-', which will cause it to save | |
2963 | the single-letter shell options and restore their previous values at | |
2964 | function return. | |
2965 | ||
2966 | t. `complete' and `compgen' have a new `-o nosort' option, which forces | |
2967 | readline to not sort the completion matches. | |
2968 | ||
2969 | u. Bash now allows waiting for the most recent process substitution, since it | |
2970 | appears as $!. | |
2971 | ||
2972 | v. The `unset' builtin now unsets a scalar variable if it is subscripted with | |
2973 | a `0', analogous to the ${var[0]} expansion. | |
2974 | ||
2975 | w. `set -i' is no longer valid, as in other shells. | |
2976 | ||
2977 | x. BASH_SUBSHELL is now updated for process substitution and group commands | |
2978 | in pipelines, and is available with the same value when running any exit | |
2979 | trap. | |
2980 | ||
2981 | y. Bash now checks $INSIDE_EMACS as well as $EMACS when deciding whether or | |
2982 | not bash is being run in a GNU Emacs shell window. | |
2983 | ||
2984 | z. Bash now treats SIGINT received when running a non-builtin command in a | |
2985 | loop the way it has traditionally treated running a builtin command: | |
2986 | running any trap handler and breaking out of the loop. | |
2987 | ||
2988 | aa. New variable: EXECIGNORE; a colon-separate list of patterns that will | |
2989 | cause matching filenames to be ignored when searching for commands. | |
2990 | ||
2991 | bb. Aliases whose value ends in a shell metacharacter now expand in a way to | |
2992 | allow them to be `pasted' to the next token, which can potentially change | |
2993 | the meaning of a command (e.g., turning `&' into `&&'). | |
2994 | ||
2995 | 4. New Features in Readline | |
2996 | ||
8868edaf | 2997 | a. The history truncation code now uses the same error recovery mechanism as |
a0c0a00f CR |
2998 | the history writing code, and restores the old version of the history file |
2999 | on error. The error recovery mechanism handles symlinked history files. | |
3000 | ||
3001 | b. There is a new bindable variable, `enable-bracketed-paste', which enables | |
3002 | support for a terminal's bracketed paste mode. | |
3003 | ||
3004 | c. The editing mode indicators can now be strings and are user-settable | |
3005 | (new `emacs-mode-string', `vi-cmd-mode-string' and `vi-ins-mode-string' | |
3006 | variables). Mode strings can contain invisible character sequences. | |
3007 | Setting mode strings to null strings restores the defaults. | |
3008 | ||
3009 | d. Prompt expansion adds the mode string to the last line of a multi-line | |
3010 | prompt (one with embedded newlines). | |
3011 | ||
3012 | e. There is a new bindable variable, `colored-completion-prefix', which, if | |
3013 | set, causes the common prefix of a set of possible completions to be | |
3014 | displayed in color. | |
3015 | ||
3016 | f. There is a new bindable command `vi-yank-pop', a vi-mode version of emacs- | |
3017 | mode yank-pop. | |
3018 | ||
3019 | g. The redisplay code underwent several efficiency improvements for multibyte | |
3020 | locales. | |
3021 | ||
3022 | h. The insert-char function attempts to batch-insert all pending typeahead | |
3023 | that maps to self-insert, as long as it is coming from the terminal. | |
3024 | ||
3025 | i. rl_callback_sigcleanup: a new application function that can clean up and | |
3026 | unset any state set by readline's callback mode. Intended to be used | |
3027 | after a signal. | |
3028 | ||
3029 | ------------------------------------------------------------------------------ | |
ac50fbac CR |
3030 | This document details the changes between this version, bash-4.3-release, and |
3031 | the previous version, bash-4.3-rc2. | |
3032 | ||
3033 | 1. Changes to Bash | |
3034 | ||
3035 | a. Only Posix-mode shells should exit on an assignment failure in the | |
3036 | temporary environment preceding a special builtin. This is how it's been | |
3037 | documented. | |
3038 | ||
3039 | b. Fixed a bug that caused a failed special builtin to not exit a posix-mode | |
3040 | shell if the failing builtin was on the LHS of a && or ||. | |
3041 | ||
3042 | c. Changed the handling of unquoted backslashes in regular expressions to be | |
3043 | closer to bash-4.2. | |
3044 | ||
3045 | d. globstar (**) no longer traverses symbolic links that resolve to | |
3046 | directories. This eliminates some duplicate entries. | |
3047 | ||
3048 | e. Fixed a bug that caused a SIGCHLD trap handler to not be able to change the | |
3049 | SIGCHLD disposition. | |
3050 | ||
3051 | f. Fixed a bug that caused a crash when -x was enabled and a command | |
3052 | contained a printable multibyte (wide) character. | |
3053 | ||
3054 | g. Fixed a bug that caused an interactive shell without line editing enabled | |
3055 | to read invalid data after receiving a SIGINT. | |
3056 | ||
3057 | h. Fixed a bug that caused command word completion to fail if the directory in | |
3058 | $PATH where the completion would be found contained single or double quotes. | |
3059 | ||
3060 | i. Fixed a bug that caused a shell with -v enabled to print commands in $() | |
3061 | multiple times. | |
3062 | ||
3063 | 2. Changes to Readline | |
3064 | ||
3065 | a. Fixed a bug that caused `undo' to reference freed memory or null pointers. | |
3066 | ||
3067 | 3. New Features in Bash | |
3068 | ||
3069 | a. The [[ -v ]] option now understands array references (foo[1]) and returns | |
3070 | success if the referenced element has a value. | |
3071 | ||
3072 | ------------------------------------------------------------------------------ | |
3073 | This document details the changes between this version, bash-4.3-rc2, and the | |
3074 | previous version, bash-4.3-rc1. | |
3075 | ||
3076 | 1. Changes to Bash | |
3077 | ||
3078 | a. Fixed a bug that left variables set by printf -v marked as invisible. | |
3079 | ||
3080 | b. Fixed an off-by-one error in a job control warning message. | |
3081 | ||
3082 | c. Fixed a bug that caused the shell to crash after declaring a nameref variable | |
3083 | without a value. | |
3084 | ||
3085 | d. Fixed a bug that caused asynchronous commands to not set $? correctly. | |
3086 | ||
3087 | e. Fixed a bug that caused out-of-order execution when executing aliases with | |
3088 | embedded newlines containing `.' commands. | |
3089 | ||
3090 | f. Fixed a bug that caused error messages generated by expansion errors in | |
3091 | `for' commands to have the wrong line number. | |
3092 | ||
3093 | g. Fixed a bug that caused the `wait' builtin to not be interruptible in an | |
3094 | interactive shell with job control enabled. | |
3095 | ||
3096 | h. Fixed a bug that caused SIGINT and SIGQUIT to not be trappable in | |
3097 | asynchronous subshell commands. | |
3098 | ||
3099 | i. Bash now requires that the value assigned to a nameref variable be a valid | |
3100 | shell identifier (variable name or array reference). | |
3101 | ||
3102 | j. Converting an existing variable to a nameref variable now turns off the | |
3103 | -i/-l/-u/-c attributes. | |
3104 | ||
3105 | k. Displaying a nameref variable with `declare -p' now displays the nameref | |
3106 | variable and its value rather than following the nameref chain. | |
3107 | ||
3108 | l. Fixed a problem with interrupt handling that caused a second and subsequent | |
3109 | SIGINT to be ignored by interactive shells. | |
3110 | ||
3111 | m. Fixed a bug that caused certain positional parameter and array expansions | |
3112 | to mishandle (discard) null positional parameters and array elements. | |
3113 | ||
3114 | n. The shell no longer blocks receipt of signals while running trap handlers | |
3115 | for those signals, and allows most trap handlers to be run recursively | |
3116 | (running trap handlers while a trap handler is executing). | |
3117 | ||
3118 | o. The shell now handles backslashes in regular expression arguments to the | |
3119 | [[ command's =~ operator slightly differently, resulting in more | |
3120 | consistent behavior. | |
3121 | ||
3122 | 2. Changes to Readline | |
3123 | ||
3124 | a. Fixed a bug that could cause readline to crash and seg fault attempting to | |
3125 | expand an empty history entry. | |
3126 | ||
3127 | b. Fixed a bug that caused a bad entry in the $LS_COLORS variable to abort all | |
3128 | color processing but leave color enabled. | |
3129 | ||
3130 | c. Fixed a bug that caused display problems with multi-line prompts containing | |
3131 | invisible characters on multiple lines. | |
3132 | ||
3133 | d. Fixed a bug that caused effects made by undoing changes to a history line to | |
3134 | be discarded. | |
3135 | ||
3136 | 3. New Features in Bash | |
3137 | ||
3138 | 4. New Features in Readline | |
3139 | ||
3140 | a. When creating shared libraries on Mac OS X, the pathname written into the | |
3141 | library (install_name) no longer includes the minor version number. | |
3142 | ------------------------------------------------------------------------------ | |
3143 | This document details the changes between this version, bash-4.3-rc1, and the | |
3144 | previous version, bash-4.3-beta2. | |
3145 | ||
3146 | 1. Changes to Bash | |
3147 | ||
3148 | a. Fixed a bug in bash completion that caused a tilde to be expanded even if | |
3149 | the `direxpand' option was not enabled. | |
3150 | ||
3151 | b. Fixed a potential bug that could cause corrupted input in interactive shells | |
3152 | running without line editing and with `ignoreeof' enabled. | |
3153 | ||
3154 | c. Fixed a bug that could cause failures when opening pipes back to shells | |
3155 | created to run process substitutions. | |
3156 | ||
3157 | d. Fixed a bug that caused an assignment to TEXTDOMAIN to require TEXTDOMAINDIR | |
3158 | to be set in order to actually change the current text domain. | |
3159 | ||
3160 | e. Changed the way redirections are printed to avoid confusion when the target | |
3161 | of an output redirection is a process substitution beginning with `>'. | |
3162 | ||
3163 | 2. Changes to Readline | |
3164 | ||
3165 | a. Shared library building is now supported on Mac OS X 10.9 (Darwin 13). | |
3166 | ||
3167 | 3. New Features in Bash | |
3168 | ||
3169 | a. `cd' has a new `-@' option to browse a file's extended attributes on | |
3170 | systems that support O_XATTR. | |
3171 | ||
3172 | 4. New Features in Readline | |
3173 | ||
3174 | a. There are additional default key bindings for MinGW32 | |
3175 | ||
3176 | ------------------------------------------------------------------------------ | |
3177 | This document details the changes between this version, bash-4.3-beta2, and the | |
3178 | previous version, bash-4.3-beta. | |
3179 | ||
3180 | 1. Changes to Bash | |
3181 | ||
3182 | a. Fixed a bug that caused assignment to an unset variable using a negative | |
3183 | subscript to result in a segmentation fault. | |
3184 | ||
3185 | b. Fixed a bug that caused assignment to a string variable using a negative | |
3186 | subscript to use the incorrect index. | |
3187 | ||
3188 | c. Fixed a bug that caused some strings to be interpreted as invalid | |
3189 | extended globbing expressions when used with the help builtin. | |
3190 | ||
3191 | d. Fixed a bug that caused an attempt to trap a signal whose disposition | |
3192 | cannot be changed to reference uninitialized memory. | |
3193 | ||
3194 | e. Command completion now skips assignment statements preceding a command | |
3195 | name and completes the command. | |
3196 | ||
3197 | f. Fixed a bug that caused `compgen -f' in a non-interactive shell to dump | |
3198 | core under certain circumstances. | |
3199 | ||
3200 | g. Fixed a bug that caused the `read -N' to misbehave when the input stream | |
3201 | contains 0xff. | |
3202 | ||
3203 | 2. Changes to Readline | |
3204 | ||
3205 | a. Changed message when an incremental search fails to include "failed" in | |
3206 | the prompt and display the entire search string instead of just the last | |
3207 | matching portion. | |
3208 | ||
3209 | b. Fixed a bug that caused an arrow key typed to an incremental search prompt | |
3210 | to process the key sequence incorrectly. | |
3211 | ||
3212 | c. Additional key bindings for arrow keys on MinGW. | |
3213 | ||
3214 | 3. New Features in Bash | |
3215 | ||
3216 | a. The help builtin now attempts substring matching (as it did through | |
3217 | bash-4.2) if exact string matching fails. | |
3218 | ||
3219 | b. The fc builtin now interprets -0 as the current command line. | |
3220 | ||
3221 | c. Completing directory names containing shell variables now adds a trailing | |
3222 | slash if the expanded result is a directory. | |
3223 | ||
3224 | 4. New Features in Readline | |
3225 | ||
3226 | a. rl_change_environment: new application-settable variable that controls | |
3227 | whether or not Readline modifies the environment (currently readline | |
3228 | modifies only LINES and COLUMNS). | |
3229 | ||
3230 | ------------------------------------------------------------------------------ | |
3231 | This document details the changes between this version, bash-4.3-beta, and the | |
3232 | previous version, bash-4.3-alpha. | |
3233 | ||
3234 | 1. Changes to Bash | |
3235 | ||
3236 | a. Fixed a bug in the prompt directory name "trimming" code that caused | |
3237 | memory corruption and garbled the results. | |
3238 | ||
3239 | b. Fixed a bug that caused single quotes that resulted from $'...' quoting | |
3240 | in the replacement portion of a double-quoted ${word/pat/rep} expansion | |
3241 | to be treated as quote characters. | |
3242 | ||
3243 | c. Fixed a bug that caused assignment statements preceding a command word to | |
3244 | result in assignment statements following a declaration command to not be | |
3245 | expanded like assignment statements. | |
3246 | ||
3247 | d. Fixed a bug with variable search order in the presence of local variables | |
3248 | with the same name as variables in the temporary environment supplied to | |
3249 | a shell function. | |
3250 | ||
3251 | e. Fixed a bug that caused constructs like 1<(2) to be interpreted as process | |
3252 | substitutions even in an arithmetic context. | |
3253 | ||
3254 | f. Fixed several cases where `invisible' variables (variables with attributes | |
3255 | but no values, which are technically unset) were treated incorrectly. | |
3256 | ||
3257 | g. Fixed a bug that caused group commands in pipelines that were not the | |
3258 | last element to not run the EXIT trap. | |
3259 | ||
3260 | h. Fixed a bug that caused `unset -n' to not unset a nameref variable in | |
3261 | certain cases. | |
3262 | ||
3263 | i. Fixed the nameref circular reference checking to be less strict and only | |
3264 | disallow a nameref variable with the same value as its name at the global | |
3265 | scope. | |
3266 | ||
3267 | j. Fixed a bug that caused trap handlers to be executed recursively, | |
3268 | corrupting internal data structures. | |
3269 | ||
3270 | k. Fixed a bug that could result in bash not compiling if certain options were | |
3271 | not enabled. | |
3272 | ||
3273 | l. Fixed a bug that caused the arithmetic expansion code to attempt variable | |
3274 | assignments when operator precedence prohibited them. | |
3275 | ||
3276 | m. Word expansions like ${foo##bar} now understand indirect variable references. | |
3277 | ||
3278 | n. Fixed a bug that caused `declare -fp name' to not display a function | |
3279 | definition. | |
3280 | ||
3281 | o. Fixed a bug that caused asynchronous child processes to modify the stdin | |
3282 | file pointer when bash was using it to read a script, which modified the | |
3283 | parent's value as well. | |
3284 | ||
3285 | 2. Changes to Readline | |
3286 | ||
3287 | a. Fixed a bug in vi mode that caused the arrow keys to set the saved last | |
3288 | vi-mode command to the wrong value. | |
3289 | ||
3290 | b. Fixed a bug that caused double-quoted strings to be scanned incorrectly | |
3291 | when being used as the value of a readline variable assignment. | |
3292 | ||
3293 | c. Fixed a bug with vi mode that prevented `.' from repeating a command | |
3294 | entered on a previous line (command). | |
3295 | ||
3296 | d. Fixed a bug that could cause completion to core dump if it was interrupted | |
3297 | by a signal. | |
3298 | ||
3299 | e. Readline now sends the meta-key enable string to the terminal if the | |
3300 | terminal has been successfully initialized. | |
3301 | ||
3302 | f. Readline now calls the signal hook after resizing the terminal when it | |
3303 | receives a SIGWINCH. | |
3304 | ||
3305 | g. Fixed a bug that could cause the history list code to perform an out-of- | |
3306 | bounds array reference if the history list is empty. | |
3307 | ||
3308 | 3. New Features in Bash | |
3309 | ||
3310 | a. Shells started to run process substitutions now run any trap set on EXIT. | |
3311 | ||
3312 | b. There is now a configure-time option to enable the globasciiranges option | |
3313 | by default. | |
3314 | ||
3315 | c. The read builtin now checks its first variable argument for validity before | |
3316 | trying to read any input. | |
3317 | ||
3318 | ------------------------------------------------------------------------------ | |
3319 | This document details the changes between this version, bash-4.3-alpha, | |
3320 | and the previous version, bash-4.2-release. | |
3321 | ||
3322 | 1. Changes to Bash | |
3323 | ||
3324 | a. Fixed several bugs concerning incomplete bracket expressions in filename | |
3325 | generation (globbing) patterns. | |
3326 | ||
3327 | b. Fixed a bug with single quotes and WORD in ${param op WORD} when running | |
3328 | in Posix mode. | |
3329 | ||
3330 | c. Fixed a bug that caused the pattern removal and pattern substitution word | |
3331 | expansions and case statement word expansion to not match the empty string. | |
3332 | ||
3333 | d. Fixed a bug that caused the tzset() function to not work after changing | |
8868edaf | 3334 | the TZ environment variable. |
ac50fbac CR |
3335 | |
3336 | e. Fixed a bug that caused the RHS of an assignment statement to undergo | |
3337 | word splitting when it contained an unquoted $@. | |
3338 | ||
3339 | f. Fixed bugs that caused the shell to not react to a SIGINT sent while | |
3340 | waiting for a child process to exit. | |
3341 | ||
3342 | g. Bash doesn't try to run things in a signal handler context when it gets a | |
3343 | signal (SIGINT/SIGHUP/etc) while reading input using readline but still | |
3344 | be responsive to terminating signals. | |
3345 | ||
3346 | h. Fixed a bug that caused bash to go into an infinite loop if a filename | |
3347 | to be matched contained an invalid multibyte character. | |
3348 | ||
3349 | i. Fixed a bug that caused PS4 to end up being truncated if it is longer | |
3350 | than 128 bytes. | |
3351 | ||
3352 | j. Fixed a bug that caused brace expansion to not skip over double-quoted | |
3353 | command substitution. | |
3354 | ||
3355 | k. System-specific updates for: DJGPP, HP/UX, Mac OS X | |
3356 | ||
3357 | l. Fixed a bug in displaying commands that caused redirections to be associated | |
3358 | with the wrong part of the command. | |
3359 | ||
3360 | m. Fixed the coproc cleanup to unset the appropriate shell variables when a | |
3361 | coproc terminates. | |
3362 | ||
3363 | n. Fixed a bug that caused `fc' to dump core due to incorrect calculation of | |
3364 | the last history entry. | |
3365 | ||
3366 | o. Added workarounds for FreeBSD's implementation of faccessat/eaccess and | |
3367 | `test -x'. | |
3368 | ||
3369 | p. Fixed a bug that caused the shell to not match patterns containing | |
3370 | control-A. | |
3371 | ||
3372 | q. Fixed a bug that could result in doubled error messages when the `printf' | |
3373 | builtin got a write error. | |
3374 | ||
3375 | r. Fixed a bug that caused the shell to not correctly expand words containing | |
3376 | multiple consecutive quoted empty strings (""""""aa). | |
3377 | ||
3378 | s. Fixed a bug that caused the shell to not correctly parse multi-line | |
3379 | process substitutions containing comments and quoted strings. | |
3380 | ||
3381 | t. Fixed a problem with the bash malloc's internal idea of the top of the | |
3382 | memory heap that resulted in incorrect decisions to try to reduce the | |
3383 | break and give memory back to the kernel. | |
3384 | ||
8868edaf | 3385 | u. There are changes to the expansions performed on compound array assignments, |
ac50fbac CR |
3386 | in an effort to make foo=( [ind1]=bar [ind2]=baz ) identical to |
3387 | foo[ind1]=bar foo[ind2]=baz. | |
3388 | ||
3389 | v. Bash now reports an error if `read -a name' is used when `name' is an | |
3390 | existing associative array. | |
3391 | ||
3392 | w. Fixed a bug that allowed an attempted assignment to a readonly variable | |
3393 | in an arithmetic expression to not return failure. | |
3394 | ||
3395 | x. Fixed several bugs that caused completion functions to be invoked even when | |
3396 | the cursor was before the first word in the command. | |
3397 | ||
3398 | y. Fixed a bug that caused parsing a command substitution to overwrite the | |
3399 | parsing state associated with the complete input line. | |
3400 | ||
3401 | z. Fixed several bugs with the built-in snprintf replacement and field widths | |
3402 | and floating point. | |
3403 | ||
3404 | aa. Fixed a bug that caused incorrect offset calculations and input buffer | |
3405 | corruption when reading files longer than 2^31 bytes. | |
3406 | ||
3407 | bb. Fixed several bugs where bash performed arithmetic evaluation in contexts | |
3408 | where evaluation is suppressed. | |
3409 | ||
3410 | cc. Fixed a bug that caused bash to close FIFOs used for process substitution | |
3411 | too early when a shell function was executing, but protect against using | |
3412 | all file descriptors when the shell functions are invoked inside loops. | |
3413 | ||
3414 | dd. Added checks for printable (and non-printable) multibyte characters for | |
3415 | use in error messages. | |
3416 | ||
3417 | ee. Fixed a bug that caused ^O (operate-and-get-next) to not work correctly | |
3418 | at the end of the history list. | |
3419 | ||
3420 | ff. Fixed a bug that caused command-oriented history to incorrectly combine | |
3421 | here documents into one line. | |
3422 | ||
3423 | gg. Fixed a bug that caused importing SHELLOPTS from the environment into a | |
3424 | Posix-mode shell to print an error message and refuse to parse it. | |
3425 | ||
3426 | hh. Fixed a bug that caused the shell to delete an extra history entry when | |
3427 | using `history -s'. | |
3428 | ||
3429 | ii. Fixed a bug that caused floating-point exceptions and overflow errors | |
3430 | for the / and % arithmetic operators when using INTMAX_MIN and -1. | |
3431 | ||
3432 | jj. Fixed a bug that caused parsing errors when reading an arithmetic for | |
3433 | loop inside a command substitution. | |
3434 | ||
3435 | kk. Fixed a bug that caused a readonly function to be unset when unset was | |
3436 | called without the -f or -v option. | |
3437 | ||
3438 | ll. Fixed several bugs in the code that quotes characters special to regular | |
3439 | expressions when used in a quoted string on the RHS of the =~ operator | |
3440 | to the [[ command. | |
3441 | ||
3442 | mm. Fixed a bug that caused redirections to fail because the file descriptor | |
3443 | limit was set to a value less than 10. | |
3444 | ||
3445 | nn. Fixed a bug that caused the `read' builtin to execute code in a signal | |
3446 | handler context if read timed out. | |
3447 | ||
3448 | oo. Fixed a bug that caused extended globbing patterns to not match files | |
3449 | beginning with `.' correctly when a `.' was explicitly supplied in the | |
3450 | pattern. | |
3451 | ||
3452 | pp. Fixed a bug that caused key sequences longer than two characters to not | |
3453 | work when used with `bind -x'. | |
3454 | ||
3455 | qq. Fixed a bug that resulted in redefined functions having the wrong source | |
3456 | file names in BASH_SOURCE. | |
3457 | ||
3458 | rr. Fixed a bug that caused the read builtin to assign null strings to variables | |
3459 | when using `read -N', which caused core dumps when referenced | |
3460 | ||
3461 | ss. Fixed a bug that caused `bash -m script' to not enable job control while | |
3462 | running the script. | |
3463 | ||
3464 | tt. Fixed a bug that caused `printf -v var' to dump core when used with the | |
3465 | %b format code. | |
3466 | ||
3467 | uu. Fixed a bug that caused the shell to exit with the wrong status if -e was | |
3468 | active and the shell exited on a substitution error. | |
3469 | ||
3470 | vv. Fixed a bug that caused the shell to seg fault if an array variable with | |
3471 | the same name as an existing associative array was implicitly created by | |
3472 | an assignment (declare a[n]=b). | |
3473 | ||
3474 | ww. Fixed a bug that caused a redirection to misbehave if the number specified | |
3475 | for a file descriptor overflows an intmax_t. | |
3476 | ||
3477 | xx. Fixed several bugs with the handling of valid and invalid unicode character | |
3478 | values when used with the \u and \U escape sequences to printf and $'...'. | |
3479 | ||
3480 | yy. Fixed a bug that caused tildes to not be escaped in expanded filenames, | |
3481 | making them subject to later expansion. | |
3482 | ||
3483 | zz. When using the pattern substitution word expansion, bash now runs the | |
3484 | replacement string through quote removal, since it allows quotes in that | |
3485 | string to act as escape characters. This is not backwards compatible, so | |
3486 | it can be disabled by setting the bash compatibility mode to 4.2. | |
3487 | ||
3488 | aaa. Fixed the rest of the cases where the shell runs non-allowed code in a | |
3489 | signal handler context. | |
3490 | ||
3491 | bbb. Fixed a bug that caused spurious DEL characters (\177) to appear in | |
3492 | double-quoted expansion where the RHS is evaluated to the empty string. | |
3493 | ||
3494 | ccc. Fixed a bug that caused the use of the shell's internal random number | |
3495 | generator for temporary file names to perturb the random number | |
3496 | sequence. | |
3497 | ||
3498 | ddd. Fixed several bugs that caused `declare -g' to not set the right global | |
3499 | variables or to misbehave when declaring global indexed arrays. | |
3500 | ||
3501 | eee. Fixed a logic bug that caused extended globbing in a multibyte locale to | |
3502 | cause failures when using the pattern substititution word expansions. | |
3503 | ||
3504 | fff. Fixed a bug that caused the `lastpipe' option to corrupt the file | |
3505 | descriptor used to read the script. | |
3506 | ||
3507 | ggg. Fixed a bug that causes the shell to delete DEL characters in the | |
3508 | expanded value of variables used in the same quoted string as variables | |
3509 | that expand to nothing. | |
3510 | ||
3511 | hhh. Fixed a bug that caused the shell to assign the wrong value from an | |
3512 | assignment like (( x=7 )) when `x' was an existing array variable. | |
3513 | ||
3514 | iii. Fixed a bug that caused the shell to misbehave when generating sequences | |
3515 | and the boundary values overflow an intmax_t. | |
3516 | ||
3517 | jjj. Fixed a bug caused expansion errors if an expansion of "$@" appeared | |
3518 | next to another expansion (e.g.. "${@}${x}"). | |
3519 | ||
3520 | kkk. Fixed a potential buffer overflow bug when performing /dev/fd expansion. | |
3521 | ||
3522 | lll. Fixed a bug that resulted in an extra semicolon being added to compound | |
3523 | assignments when they were added to the history list. | |
3524 | ||
3525 | mmm. Fixed a bug that caused mapfile to read one extra line from the input. | |
3526 | ||
3527 | nnn. Fixed a bug that caused the mail checking code to use uninitialized | |
3528 | values. | |
3529 | ||
3530 | ooo. Fixed a bug that prevented history timestamps from being saved if the | |
3531 | history comment character is unset. | |
3532 | ||
3533 | ppp. Fixed a bug that caused the case-modifying expansions to not work with | |
3534 | multibyte characters. | |
3535 | ||
3536 | qqq. Fixed a bug that caused the edit-and-execute bindable readline command | |
3537 | to see the wrong data if invoked in the middle of a multi-line quoted | |
3538 | string. | |
3539 | ||
3540 | rrr. Fixed a bug that resulted in the shell returning the wrong exit status | |
3541 | for a background command on systems that recycle PIDs very quickly. | |
3542 | ||
3543 | sss. Fixed a bug that caused asynchronous group commands to not run any EXIT | |
3544 | trap defined in the body of the command. | |
3545 | ||
3546 | ttt. Fixed a bug that caused `eval "... ; return"' to not clean up properly. | |
3547 | ||
3548 | uuu. Fixed a bug that caused the shell to dump core if `read' reads an escaped | |
3549 | IFS whitespace character. | |
3550 | ||
3551 | vvv. Fixed a bug that caused BASH_COMMAND to be set to an incorrect value when | |
3552 | executing a (...) subshell. | |
3553 | ||
3554 | www. Fixed a couple of pointer aliasing bugs with the token string in arithmetic | |
3555 | evaluation. | |
3556 | ||
3557 | xxx. Fixed a bug with parsing multi-line command substitutions when reading | |
3558 | the `do' keyword followed by whitespace. | |
3559 | ||
3560 | yyy. Fixed a bug that caused the shell to seg fault if the time given to the | |
3561 | printf %(...)T format overflowed the value accepted by localtime(3). | |
3562 | ||
3563 | zzz. Fixed a problem with displaying help topics in two columns when the | |
3564 | translated text contained multibyte characters. | |
3565 | ||
3566 | aaaa. Fixed a bug with the extended globbing pattern matcher where a `*' was | |
3567 | followed by a negated extended glob pattern. | |
3568 | ||
3569 | bbbb. Fixed a race condition with short-lived coproc creation and reaping that | |
3570 | caused the child process to be reaped before the various coproc shell | |
3571 | variables were initialized. | |
3572 | ||
3573 | cccc. Fixed a bug where turning off `errexit' in command substitution subshells | |
3574 | was not reflected in $SHELLOPTS. | |
3575 | ||
3576 | dddd. Partially fixed an inconsistency in how the shell treated shell | |
3577 | functions run from an EXIT trap. | |
3578 | ||
3579 | eeee. Fixed a bug in how the shell invalidated FIFOs used for process | |
3580 | substitution when executing a pipeline (once rather than in every child). | |
3581 | ||
3582 | ffff. Fixed a bug that occurred when expanding a special variable ($@, $*) | |
3583 | within double quotes and the expansion resulted in an empty string. | |
3584 | ||
3585 | gggg. Fixed bugs with executing a SIGCHLD trap handler to make sure that it's | |
3586 | executed once per exited child. | |
3587 | ||
3588 | hhhh. Fixed a bug that caused `declare' and `test' to find variables that | |
3589 | had been given attributes but not assigned values. Such variables are | |
3590 | not set. | |
3591 | ||
3592 | iiii. Fixed a bug that caused commands in process substitutions to not look in | |
3593 | the local temporary environment when performing word expansions. | |
3594 | ||
3595 | jjjj. Fixed several problems with globstar expansions (**/**) returning null | |
3596 | filenames and multiple instances of the same pathname. | |
3597 | ||
3598 | kkkk. Fixed an oversight that did not allow the exit status of `coproc' to | |
3599 | be inverted using `!'. | |
3600 | ||
3601 | llll. Fixed a bug that caused the -e option to be re-enabled using `set -e' | |
3602 | even when executing in a context where -e is ignored. | |
3603 | ||
3604 | mmmm. Fixed a (mostly theoretical) bug with input lines longer than SIZE_MAX. | |
3605 | ||
3606 | nnnn. Fixed a bug that could result in double evaluation of command | |
3607 | substitutions when they appear in failed redirections. | |
3608 | ||
3609 | oooo. Fixed a bug that could cause seg faults during `mapfile' callbacks if | |
3610 | the callback unsets the array variable mapfile is using. | |
3611 | ||
3612 | pppp. Fixed several problems with variable assignments using ${var:=value} | |
3613 | when the variable assignment is supposed to have side effects. | |
3614 | ||
3615 | qqqq. Fixed a bug that caused a failure of an assignment statement preceding a | |
3616 | builtin caused the next invocation of a special builtin to exit the shell. | |
3617 | ||
3618 | rrrr. Fixed several problems with IFS when it appears in the temporary environment | |
3619 | and is used in redirections. | |
3620 | ||
3621 | ssss. Fixed a problem that caused IFS changes using ${IFS:=value} to modify | |
3622 | how preceding expansions were split. | |
3623 | ||
3624 | tttt. Fixed a problem that caused subshells to not run an EXIT trap they set. | |
3625 | ||
3626 | uuuu. Fixed a problem that caused shells started in posix mode to attempt to | |
3627 | import shell functions with invalid names from the environment. We now | |
3628 | print a warning. | |
3629 | ||
3630 | vvvv. Worked around a kernel problem that caused SIGCHLD to interrupt open(2) | |
3631 | on a FIFO used for process substitution, even if the SIGCHLD handler was | |
3632 | installed with the SA_RESTART flag. | |
3633 | ||
3634 | wwww. Fixed a problem that resulted in inconsistent expansion of $* and ${a[*]}. | |
3635 | ||
3636 | xxxx. Fixed a problem that caused `read -t' to crash when interrupted by | |
3637 | SIGINT. | |
3638 | ||
3639 | yyyy. Fixed a problem that caused pattern removal to fail randomly because the | |
3640 | pattern matcher read beyond the end of a string. | |
3641 | ||
3642 | zzzz. Fixed a bug that caused core dumps when shell functions tried to create | |
3643 | local shadow copies of special variables like GROUPS. | |
3644 | ||
3645 | aaaaa. Fixed a bug that caused SIGTERM to be occasionally lost by children of | |
3646 | interactive shells when it arrived before the child process reset the | |
3647 | handler from SIG_DFL. | |
3648 | ||
3649 | bbbbb. Fixed a bug that caused redirections like <&n- to leave file descriptor | |
3650 | n closed if executed with a builtin command. | |
3651 | ||
3652 | ccccc. Fixed a bug that caused incorrect completion quoting when completing a | |
3653 | word containing a globbing character with `show-all-if-ambiguous' set. | |
3654 | ||
3655 | ddddd. Fixed a bug that caused printf's %q format specifier not to quote a | |
3656 | tilde even if it appeared in a location where it would be subject to | |
3657 | tilde expansion. | |
3658 | ||
3659 | 2. Changes to Readline | |
3660 | ||
3661 | a. Fixed a bug that did not allow the `dd', `cc', or `yy' vi editing mode | |
3662 | commands to work on the entire line. | |
3663 | ||
3664 | b. Fixed a bug that caused redisplay problems with prompts longer than 128 | |
3665 | characters and history searches. | |
3666 | ||
3667 | c. Fixed a bug that caused readline to try and run code to modify its idea | |
3668 | of the screen size in a signal handler context upon receiving a SIGWINCH. | |
3669 | ||
3670 | d. Fixed a bug that caused the `meta' key to be enabled beyond the duration | |
3671 | of an individual call top readline(). | |
3672 | ||
3673 | e. Added a workaround for a wcwidth bug in Mac OS X that caused readline's | |
3674 | redisplay to mishandle zero-width combining characters. | |
3675 | ||
3676 | f. Fixed a bug that caused readline to `forget' part of a key sequence when | |
3677 | a multiple-key sequence caused it to break out of an incremental search. | |
3678 | ||
3679 | g. Fixed bugs that caused readline to execute code in a signal handler | |
3680 | context if interrupted while reading from the file system during completion. | |
3681 | ||
3682 | h. Fixed a bug that caused readline to `forget' part of a key sequence when | |
3683 | reading an unbound multi-character key sequence. | |
3684 | ||
3685 | i. Fixed a bug that caused Readline's signal handlers to be installed beyond | |
3686 | the bounds of a single call to readline(). | |
3687 | ||
3688 | j. Fixed a bug that caused the `.' command to not redo the most recent `R' | |
3689 | command in vi mode. | |
3690 | ||
3691 | k. Fixed a bug that caused ignoring case in completion matches to result in | |
3692 | readline using the wrong match. | |
3693 | ||
3694 | l. Paren matching now works in vi insert mode. | |
3695 | ||
3696 | m. Fix menu-completion to make show-all-if-ambiguous and menu-complete-display-prefix | |
3697 | work together. | |
3698 | ||
3699 | n. Fixed a bug that didn't allow the `cc', `dd', or `yy' commands to be redone | |
3700 | in vi editing mode. | |
3701 | ||
3702 | o. Fixed a bug that caused the filename comparison code to not compare | |
3703 | multibyte characters correctly when using case-sensitive or case-mapping | |
3704 | comparisons. | |
3705 | ||
3706 | p. Fixed the input reading loop to call the input hook function only when there | |
3707 | is no terminal input available. | |
3708 | ||
3709 | q. Fixed a bug that caused binding a macro to a multi-character key sequence | |
3710 | where the sequence and macro value share a common prefix to not perform | |
3711 | the macro replacement. | |
3712 | ||
3713 | r. Fixed several redisplay errors with multibyte characters and prompts | |
3714 | containing invisible characters when using horizontal scrolling. | |
3715 | ||
3716 | s. Fixed a bug that caused redisplay errors when trying to overwrite | |
3717 | existing characters using multibyte characters. | |
3718 | ||
3719 | 3. New Features in Bash | |
3720 | ||
3721 | a. The `helptopic' completion action now maps to all the help topics, not just | |
3722 | the shell builtins. | |
3723 | ||
3724 | b. The `help' builtin no longer does prefix substring matching, so `help read' | |
3725 | does not match `readonly'. | |
3726 | ||
3727 | c. The shell can be compiled to not display a message about processes that | |
3728 | terminate due to SIGTERM. | |
3729 | ||
3730 | d. Non-interactive shells now react to the setting of checkwinsize and set | |
3731 | LINES and COLUMNS after a foreground job exits. | |
3732 | ||
3733 | e. There is a new shell option, `globasciiranges', which, when set to on, | |
3734 | forces globbing range comparisons to use character ordering as if they | |
3735 | were run in the C locale. | |
3736 | ||
3737 | f. There is a new shell option, `direxpand', which makes filename completion | |
3738 | expand variables in directory names in the way bash-4.1 did. | |
3739 | ||
3740 | g. In Posix mode, the `command' builtin does not change whether or not a | |
3741 | builtin it shadows is treated as an assignment builtin. | |
3742 | ||
3743 | h. The `return' and `exit' builtins accept negative exit status arguments. | |
3744 | ||
3745 | i. The word completion code checks whether or not a filename containing a | |
3746 | shell variable expands to a directory name and appends `/' to the word | |
3747 | as appropriate. The same code expands shell variables in command names | |
3748 | when performing command completion. | |
3749 | ||
3750 | j. In Posix mode, it is now an error to attempt to define a shell function | |
3751 | with the same name as a Posix special builtin. | |
3752 | ||
3753 | k. When compiled for strict Posix conformance, history expansion is disabled | |
3754 | by default. | |
3755 | ||
3756 | l. The history expansion character (!) does not cause history expansion when | |
3757 | followed by the closing quote in a double-quoted string. | |
3758 | ||
3759 | m. `complete' and its siblings compgen/compopt now takes a new `-o noquote' | |
3760 | option to inhibit quoting of the completions. | |
3761 | ||
3762 | n. Setting HISTSIZE to a value less than zero causes the history list to be | |
3763 | unlimited (setting it 0 zero disables the history list). | |
3764 | ||
3765 | o. Setting HISTFILESIZE to a value less than zero causes the history file size | |
3766 | to be unlimited (setting it to 0 causes the history file to be truncated | |
3767 | to zero size). | |
3768 | ||
3769 | p. The `read' builtin now skips NUL bytes in the input. | |
3770 | ||
3771 | q. There is a new `bind -X' option to print all key sequences bound to Unix | |
3772 | commands. | |
3773 | ||
3774 | r. When in Posix mode, `read' is interruptible by a trapped signal. After | |
3775 | running the trap handler, read returns 128+signal and throws away any | |
3776 | partially-read input. | |
3777 | ||
3778 | s. The command completion code skips whitespace and assignment statements | |
3779 | before looking for the command name word to be completed. | |
3780 | ||
3781 | t. The build process has a new mechanism for constructing separate help files | |
3782 | that better reflects the current set of compilation options. | |
3783 | ||
3784 | u. The -nt and -ot options to test now work with files with nanosecond | |
3785 | timestamp resolution. | |
3786 | ||
3787 | v. The shell saves the command history in any shell for which history is | |
3788 | enabled and HISTFILE is set, not just interactive shells. | |
3789 | ||
3790 | w. The shell has `nameref' variables and new -n(/+n) options to declare and | |
3791 | unset to use them, and a `test -R' option to test for them. | |
3792 | ||
3793 | x. The shell now allows assigning, referencing, and unsetting elements of | |
3794 | indexed arrays using negative subscripts (a[-1]=2, echo ${a[-1]}) which | |
3795 | count back from the last element of the array. | |
3796 | ||
3797 | y. The {x}<word redirection feature now allows words like {array[ind]} and | |
3798 | can use variables with special meanings to the shell (e.g., BASH_XTRACEFD). | |
3799 | ||
3800 | z. There is a new CHILD_MAX special shell variable; its value controls the | |
a0c0a00f | 3801 | number of exited child statuses the shell remembers. |
ac50fbac CR |
3802 | |
3803 | aa. There is a new configuration option (--enable-direxpand-default) that | |
3804 | causes the `direxpand' shell option to be enabled by default. | |
3805 | ||
3806 | bb. Bash does not do anything special to ensure that the file descriptor | |
3807 | assigned to X in {x}<foo remains open after the block containing it | |
3808 | completes. | |
3809 | ||
3810 | cc. The `wait' builtin has a new `-n' option to wait for the next child to | |
3811 | change status. | |
3812 | ||
3813 | dd. The `printf' %(...)T format specifier now uses the current time if no | |
3814 | argument is supplied. | |
3815 | ||
3816 | ee. There is a new variable, BASH_COMPAT, that controls the current shell | |
3817 | compatibility level. | |
3818 | ||
3819 | ff. The `popd' builtin now treats additional arguments as errors. | |
3820 | ||
3821 | gg. The brace expansion code now treats a failed sequence expansion as a | |
3822 | simple string and will continue to expand brace terms in the remainder | |
3823 | of the word. | |
3824 | ||
3825 | 4. New Features in Readline | |
3826 | ||
3827 | a. Readline is now more responsive to SIGHUP and other fatal signals when | |
3828 | reading input from the terminal or performing word completion but no | |
3829 | longer attempts to run any not-allowable functions from a signal handler | |
3830 | context. | |
3831 | ||
3832 | b. There are new bindable commands to search the history for the string of | |
3833 | characters between the beginning of the line and the point | |
3834 | (history-substring-search-forward, history-substring-search-backward) | |
3835 | ||
3836 | c. Readline allows quoted strings as the values of variables when setting | |
3837 | them with `set'. As a side effect, trailing spaces and tabs are ignored | |
3838 | when setting a string variable's value. | |
3839 | ||
3840 | d. The history library creates a backup of the history file when writing it | |
3841 | and restores the backup on a write error. | |
3842 | ||
3843 | e. New application-settable variable: rl_filename_stat_hook: a function called | |
3844 | with a filename before using it in a call to stat(2). Bash uses it to | |
3845 | expand shell variables so things like $HOME/Downloads have a slash | |
3846 | appended. | |
3847 | ||
3848 | f. New bindable function `print-last-kbd-macro', prints the most-recently- | |
3849 | defined keyboard macro in a reusable format. | |
3850 | ||
3851 | g. New user-settable variable `colored-stats', enables use of colored text | |
3852 | to denote file types when displaying possible completions (colored analog | |
3853 | of visible-stats). | |
3854 | ||
3855 | h. New user-settable variable `keyseq-timout', acts as an inter-character | |
3856 | timeout when reading input or incremental search strings. | |
3857 | ||
3858 | i. New application-callable function: rl_clear_history. Clears the history list | |
3859 | and frees all readline-associated private data. | |
3860 | ||
3861 | j. New user-settable variable, show-mode-in-prompt, adds a characters to the | |
3862 | beginning of the prompt indicating the current editing mode. | |
3863 | ||
3864 | k. New application-settable variable: rl_input_available_hook; function to be | |
3865 | called when readline needs to check whether there is data available on its | |
3866 | input source. The default hook checks rl_instream. | |
3867 | ||
3868 | l. Readline calls an application-set event hook (rl_signal_event_hook) after | |
3869 | it gets a signal while reading input (read returns -1/EINTR but readline | |
3870 | does not handle the signal immediately) to allow the application to handle | |
3871 | or otherwise note it. Not currently called for SIGHUP or SIGTERM. | |
3872 | ||
3873 | m. If the user-settable variable `history-size' is set to a value less than | |
3874 | 0, the history list size is unlimited. | |
3875 | ||
3876 | ------------------------------------------------------------------------------ | |
495aee44 CR |
3877 | This document details the changes between this version, bash-4.2-release, |
3878 | and the previous version, bash-4.2-rc2. | |
3879 | ||
3880 | 1. Changes to Bash | |
3881 | ||
3882 | a. Fixed a bug that caused some variables to be clobbered by a longjmp, | |
3883 | resulting in stack corruption. | |
3884 | ||
3885 | ------------------------------------------------------------------------------ | |
3886 | This document details the changes between this version, bash-4.2-rc2, | |
3887 | and the previous version, bash-4.2-rc1. | |
3888 | ||
3889 | 1. Changes to Bash | |
3890 | ||
3891 | a. Changes to bash_directory_completion_hook so that it's assigned to the | |
3892 | readline rl_directory_rewrite_hook variable, which modifies the directory | |
3893 | name passed to opendir without modifying the directory name the user | |
3894 | typed. | |
3895 | ||
3896 | b. Fixed bug in select builtin that caused it to not terminate correctly if | |
3897 | the read timed out due to $TMOUT. | |
3898 | ||
3899 | c. Fixed a problem that resulted in non-repeatable sequences of random | |
3900 | numbers when RANDOM=0. | |
3901 | ||
3902 | ------------------------------------------------------------------------------ | |
3903 | This document details the changes between this version, bash-4.2-rc1, | |
3904 | and the previous version, bash-4.2-beta. | |
3905 | ||
3906 | 1. Changes to Bash | |
3907 | ||
3908 | a. Fixed a bug that caused some redirection errors to leak file descriptors. | |
3909 | ||
3910 | b. Fixed a bug that caused unary `+' and `-' arithmetic operators to have a | |
3911 | higher precedence than unary `!' and `~'. | |
3912 | ||
3913 | c. Fixed a bug that caused simple commands in a pipeline to affect the exit | |
3914 | status ($?) seen by subsequent pipeline commands. | |
3915 | ||
3916 | d. A number of cygwin-specific changes to avoid the use of text-mode files | |
3917 | and file access, and to make sure that \r is handled correctly. | |
3918 | ||
3919 | e. Fixed a bug that caused the read builtin to not return failure if an | |
3920 | attempt is made to assign to a readonly variable. | |
3921 | ||
3922 | f. Fixed a bug that caused some builtin usage messages to not be translated. | |
3923 | ||
3924 | g. Fixed a bug that caused the getopts builtin to not return failure if an | |
3925 | attempt is made to assign to a readonly variable. Now it returns 2. | |
3926 | ||
3927 | h. Fixed the cd and pwd builtins to return failure if PWD is readonly and | |
3928 | cannot be assigned to. | |
3929 | ||
3930 | i. Added code to check the return value of access(2) on Solaris systems, | |
3931 | since it returns success for executable tests (e.g., `test -x') when | |
3932 | run by root, even if the file permissions don't allow execution. | |
3933 | ||
3934 | 2. Changes to Readline | |
3935 | ||
3936 | a. Fixed a bug that caused directory names in words to be completed to not | |
3937 | be dequoted correctly. | |
3938 | ||
3939 | 3. New Features in Bash | |
3940 | ||
3941 | 4. New Features in Readline | |
3942 | ||
3943 | ------------------------------------------------------------------------------ | |
3944 | This document details the changes between this version, bash-4.2-beta, | |
3945 | and the previous version, bash-4.2-alpha. | |
3946 | ||
3947 | 1. Changes to Bash | |
3948 | ||
3949 | a. Fixed a bug that caused the \W prompt string escape to not add a closing | |
3950 | NULL. | |
3951 | ||
3952 | b. Fixed a bug that caused partially-quoted words that were not subject to | |
3953 | word splitting to retained quoted NULLs. | |
3954 | ||
3955 | c. Added considerable efficiency speedups when pattern matching in multibyte | |
3956 | locales by skipping multibyte character functions where possible. | |
3957 | ||
3958 | d. Added considerable speedups to variable expansion when in multibyte locales. | |
3959 | ||
3960 | e. Fixed a bug that caused the expansion of $* when there are no positional | |
3961 | parameters to cause the shell to dump core when used in a pattern | |
3962 | matching context. | |
3963 | ||
3964 | f. Fixed a bug that caused variable expansions preceding regular builtins to | |
3965 | not change the shell environment during their execution. | |
3966 | ||
3967 | 2. Changes to Readline | |
3968 | ||
3969 | a. Fixed a bug that made an explicit argument of 0 to yank-last-arg behave | |
3970 | as if it were a negative argument. | |
3971 | ||
3972 | ------------------------------------------------------------------------------ | |
3973 | This document details the changes between this version, bash-4.2-alpha, | |
3974 | and the previous version, bash-4.1-release. | |
3975 | ||
3976 | 1. Changes to Bash | |
3977 | ||
3978 | a. Fixed a bug in the parser when processing alias expansions containing | |
3979 | quoted newlines. | |
3980 | ||
3981 | b. Fixed a memory leak in associative array expansion. | |
3982 | ||
3983 | c. Fixed a bug that caused quoted here-strings to be requoted when printed. | |
3984 | ||
3985 | d. Fixed a bug in arithmetic expansion that caused the index in an array | |
3986 | expansion to be evaluated twice under certain circumstances. | |
3987 | ||
3988 | e. Fixed several bugs with the expansion and display of variables that have | |
3989 | been given attributes but not values and are technically unset. | |
3990 | ||
3991 | f. Fixed a bug that caused core dumps when using filename completion that | |
3992 | expands to a filename containing a globbing character. | |
3993 | ||
3994 | g. Fixed a bug that caused assignment statements preceding a special builtin | |
3995 | when running in Posix mode to not persist after the builtin completed | |
3996 | when the special builtin was executed in a shell function without any | |
3997 | local variables. | |
3998 | ||
3999 | h. Fixed a bug that caused a command to remain in the hash table even after | |
4000 | `hash command' did not find anything if there was already an existing | |
4001 | hashed pathname. | |
4002 | ||
4003 | i. Fixed several bugs caused by executing unsafe functions from a signal | |
4004 | handler in the cases where a signal handler is executed immediately | |
4005 | rather than setting a flag for later execution. | |
4006 | ||
4007 | j. Fixed a bug that caused some internal flag variables to be set | |
4008 | incorrectly if `read -t' timed out. | |
4009 | ||
4010 | k. Fixed a Posix compatibility issue by making sure that a backslash escaping | |
4011 | a `}' within a double-quoted ${...} parameter expansion is removed as part | |
4012 | of the parameter expansion. | |
4013 | ||
4014 | l. Fixed a bug that caused execution of a trap to overwrite PIPESTATUS. | |
4015 | ||
4016 | m. Fixed a bug that caused here documents to not be displayed correctly | |
4017 | when attached to commands inside compound commands. | |
4018 | ||
4019 | n. Fixed a bug that caused the printf builtin to use the wrong precision | |
4020 | when using the `*' modifier. | |
4021 | ||
4022 | o. Fixed a bug that caused an arriving SIGCHLD to interrupt output functions | |
4023 | like those invoked by echo or printf. | |
4024 | ||
4025 | p. Changed to use a more robust mechanism than eaccess(2) when test is | |
4026 | checking filenames for execution permission. | |
4027 | ||
4028 | q. Fixed a bug that caused spurious semicolons to be added into the command | |
4029 | history in certain cases. | |
4030 | ||
4031 | r. Fixed a bug that caused the shell to free non-allocated memory when | |
4032 | unsetting element 0 of an associative array after it was assigned | |
4033 | implicitly. | |
4034 | ||
4035 | s. Fixed a bug that could cause the shell to dump core if using the `v' | |
4036 | vi editing command on a multi-line command. | |
4037 | ||
4038 | t. Fixed a bug that left FIFOs opened by process substitutions open long | |
4039 | enough to potentially cause file descriptor exhaustion when running a | |
4040 | shell function or shell builtin. | |
4041 | ||
4042 | u. Fixed a bug that caused the history expansion functions to not recognize | |
4043 | process substitution or extended glob patterns as single words. | |
4044 | ||
4045 | v. Fixed a bug that caused restricted shells to set a restricted command's | |
4046 | exit status incorrectly. | |
4047 | ||
4048 | w. Fixed a bug that caused bash to ignore the wrong set of filenames when | |
4049 | completing a command using the `complete-filename' readline command. | |
4050 | ||
4051 | x. Fixed a bug that caused a -PID argument following a -s sig or -n sig to | |
4052 | not be interpreted as a signal specification. | |
4053 | ||
4054 | y. Changed posix-mode behavior of a parse error in a `.' script or `eval' | |
4055 | command to exit the shell under Posix-specified conditions. Previous | |
4056 | versions printed a warning. | |
4057 | ||
4058 | z. Fixed a bug in \W prompt expansion that resulted in incorrect expansion | |
4059 | in the event of overlapping strings. | |
4060 | ||
4061 | aa. Fixed a bug that caused the := parameter expansion operator to return the | |
4062 | wrong value as the result of the expansion. | |
4063 | ||
4064 | bb. When in Posix mode, a single quote is not treated specially in a | |
4065 | double-quoted ${...} expansion, unless the expansion operator is | |
4066 | # or % or the non-Posix `//', `^', and `,'. In particular, it does | |
4067 | not define a new quoting context. This is from Posix interpretation 221. | |
4068 | ||
4069 | cc. Fixed a bug that inadvertently allowed program names containing slashes | |
4070 | to be entered into the command hash table. | |
4071 | ||
4072 | dd. Fixed a bug that caused the select builtin to incorrectly compute the | |
4073 | display width of the arguments in the presence of multibyte characters. | |
4074 | ||
4075 | ee. Fixed a bug that caused bash to not change the xtrace file descriptor if | |
4076 | BASH_XTRACEFD was found in the shell environment at startup. | |
4077 | ||
4078 | ff. Fixed a memory leak in the pattern removal parameter expansion. | |
4079 | ||
4080 | gg. Fixed a bug that caused SIGINT to fail to interrupt a nested loop if the | |
4081 | loop was in a pipeline. | |
4082 | ||
4083 | hh. Fixed a problem in $(...) parsing that caused the parser to add an extra | |
4084 | space to a here-document delimiter if the first word contained a `/'. | |
4085 | ||
4086 | ii. Fixed a bug that caused functions defined with the `function' reserved | |
4087 | word to require braces around the function body. | |
4088 | ||
4089 | jj. Fixed a bug that caused bash to dump core when a variable expansion being | |
4090 | used as an array subscript failed. | |
4091 | ||
4092 | kk. Fixed a bug that caused bash to dump core if the case-modification | |
4093 | expansions were used on a variable with a null value. | |
4094 | ||
4095 | ll. Fixed a bug that caused partially-quoted strings to be split incorrectly | |
4096 | if a variable with a null value was expanded within double quotes. | |
4097 | ||
4098 | mm. The pattern substitution word expansion has been sped up dramatically | |
4099 | when running in a locale with multibyte characters. | |
4100 | ||
4101 | nn. Fixed a bug that caused history -a to not write the correct lines to | |
4102 | the history file if all the new lines in the history list were added | |
4103 | since the last time the history file was read or written. | |
4104 | ||
4105 | oo. Fixed a bug that caused completion of a word with an unclosed `` command | |
4106 | substitution to set the prompt incorrectly. | |
4107 | ||
4108 | pp. Fixed a bug that caused extended globbing patterns in $HISTIGNORE or | |
4109 | $GLOBIGNORE to be incorrectly scanned. | |
4110 | ||
4111 | qq. Fixed a bug caused by closing file descriptors 3-20 on shell startup. The | |
4112 | shell now sets them to close-on-exec. | |
4113 | ||
4114 | rr. Fixed a bug that caused the exit status of `exec file' to be set incorrectly | |
4115 | if `file' was a directory. | |
4116 | ||
4117 | ss. Fixed a bug in the `.' builtin to make a non-interactive posix-mode shell | |
4118 | exit if the file argument to `.' is not found. Prefixing exec with | |
4119 | `command' makes the shell not exit. Posix requires this behavior. | |
4120 | ||
4121 | tt. Fixed a bug that caused `sh -c 'command exec; exit 1' to hang. | |
4122 | ||
4123 | uu. Fixed a bug in $(...) command substitution parsing that caused the shell | |
4124 | to treat backslash-newline incorrectly when parsing a comment. | |
4125 | ||
4126 | vv. Fixed bug that caused brace expansion sequence generation to misbehave | |
4127 | when supplied integers greater than 2**31 - 1. | |
4128 | ||
4129 | ww. Fixed a bug that caused failure to save file descriptors for redirections | |
4130 | to corrupt shell file descriptors. | |
4131 | ||
4132 | xx. Fixed a bug that caused bash-forward-shellword to not correctly handle | |
4133 | quoted strings. | |
4134 | ||
4135 | 2. Changes to Readline | |
4136 | ||
4137 | a. Fixed a bug that caused the unconverted filename to be added to the list of | |
4138 | completions when the application specified filename conversion functions. | |
4139 | ||
4140 | b. Fixed a bug that caused the wrong filename to be passed to opendir when the | |
4141 | application has specified a filename dequoting function. | |
4142 | ||
4143 | c. Fixed a bug when repeating a character search in vi mode in the case where | |
4144 | there was no search to repeat. | |
4145 | ||
4146 | d. When show-all-if-ambiguous is set, the completion routines no longer insert | |
4147 | a common match prefix that is shorter than the text being completed. | |
4148 | ||
4149 | e. The full set of vi editing commands may now be used in callback mode. | |
4150 | ||
4151 | f. Fixed a bug that caused readline to not update its idea of the terminal | |
4152 | dimensions while running in `no-echo' mode. | |
4153 | ||
4154 | h. Fixed a bug that caused readline to dump core if an application called | |
4155 | rl_prep_terminal without setting rl_instream. | |
4156 | ||
4157 | i. Fixed a bug that caused meta-prefixed characters bound to incremental | |
4158 | search forward or backward to not be recognized if they were typed | |
4159 | subsequently. | |
4160 | ||
4161 | j. The incremental search code treats key sequences that map to the same | |
4162 | functions as (default) ^G, ^W, and ^Y as equivalent to those characters. | |
4163 | ||
4164 | k. Fixed a bug in menu-complete that caused it to misbehave with large | |
4165 | negative argument. | |
4166 | ||
4167 | l. Fixed a bug that caused vi-mode yank-last-arg to ring the bell when invoked | |
4168 | at the end of the line. | |
4169 | ||
4170 | 3. New Features in Bash | |
4171 | ||
4172 | a. `exec -a foo' now sets $0 to `foo' in an executable shell script without a | |
4173 | leading #!. | |
4174 | ||
4175 | b. Subshells begun to execute command substitutions or run shell functions or | |
4176 | builtins in subshells do not reset trap strings until a new trap is | |
4177 | specified. This allows $(trap) to display the caller's traps and the | |
4178 | trap strings to persist until a new trap is set. | |
4179 | ||
4180 | c. `trap -p' will now show signals ignored at shell startup, though their | |
4181 | disposition still cannot be modified. | |
4182 | ||
4183 | d. $'...', echo, and printf understand \uXXXX and \UXXXXXXXX escape sequences. | |
4184 | ||
4185 | e. declare/typeset has a new `-g' option, which creates variables in the | |
4186 | global scope even when run in a shell function. | |
4187 | ||
4188 | f. test/[/[[ have a new -v variable unary operator, which returns success if | |
4189 | `variable' has been set. | |
4190 | ||
4191 | g. Posix parsing changes to allow `! time command' and multiple consecutive | |
4192 | instances of `!' (which toggle) and `time' (which have no cumulative | |
4193 | effect). | |
4194 | ||
4195 | h. Posix change to allow `time' as a command by itself to print the elapsed | |
4196 | user, system, and real times for the shell and its children. | |
4197 | ||
4198 | j. $((...)) is always parsed as an arithmetic expansion first, instead of as | |
4199 | a potential nested command substitution, as Posix requires. | |
4200 | ||
4201 | k. A new FUNCNEST variable to allow the user to control the maximum shell | |
4202 | function nesting (recursive execution) level. | |
4203 | ||
4204 | l. The mapfile builtin now supplies a third argument to the callback command: | |
4205 | the line about to be assigned to the supplied array index. | |
4206 | ||
4207 | m. The printf builtin has a new %(fmt)T specifier, which allows time values | |
4208 | to use strftime-like formatting. | |
4209 | ||
4210 | n. There is a new `compat41' shell option. | |
4211 | ||
4212 | o. The cd builtin has a new Posix-mandated `-e' option. | |
4213 | ||
4214 | p. Negative subscripts to indexed arrays, previously errors, now are treated | |
4215 | as offsets from the maximum assigned index + 1. | |
4216 | ||
4217 | q. Negative length specifications in the ${var:offset:length} expansion, | |
4218 | previously errors, are now treated as offsets from the end of the variable. | |
4219 | ||
4220 | r. Parsing change to allow `time -p --'. | |
4221 | ||
4222 | s. Posix-mode parsing change to not recognize `time' as a keyword if the | |
4223 | following token begins with a `-'. This means no more Posix-mode | |
4224 | `time -p'. Posix interpretation 267. | |
4225 | ||
4226 | t. There is a new `lastpipe' shell option that runs the last command of a | |
4227 | pipeline in the current shell context. The lastpipe option has no | |
4228 | effect if job control is enabled. | |
4229 | ||
4230 | u. History expansion no longer expands the `$!' variable expansion. | |
4231 | ||
4232 | v. Posix mode shells no longer exit if a variable assignment error occurs | |
4233 | with an assignment preceding a command that is not a special builtin. | |
4234 | ||
4235 | w. Non-interactive mode shells exit if -u is enabled and an attempt is made | |
4236 | to use an unset variable with the % or # expansions, the `//', `^', or | |
4237 | `,' expansions, or the parameter length expansion. | |
4238 | ||
4239 | x. Posix-mode shells use the argument passed to `.' as-is if a $PATH search | |
4240 | fails, effectively searching the current directory. Posix-2008 change. | |
4241 | ||
4242 | 4. New Features in Readline | |
4243 | ||
4244 | a. The history library does not try to write the history filename in the | |
4245 | current directory if $HOME is unset. This closes a potential security | |
4246 | problem if the application does not specify a history filename. | |
4247 | ||
4248 | b. New bindable variable `completion-display-width' to set the number of | |
4249 | columns used when displaying completions. | |
4250 | ||
4251 | c. New bindable variable `completion-case-map' to cause case-insensitive | |
4252 | completion to treat `-' and `_' as identical. | |
4253 | ||
4254 | d. There are new bindable vi-mode command names to avoid readline's case- | |
4255 | insensitive matching not allowing them to be bound separately. | |
4256 | ||
4257 | e. New bindable variable `menu-complete-display-prefix' causes the menu | |
4258 | completion code to display the common prefix of the possible completions | |
4259 | before cycling through the list, instead of after. | |
4260 | ||
4261 | ------------------------------------------------------------------------------ | |
0001803f CR |
4262 | This document details the changes between this version, bash-4.1-rc, |
4263 | and the previous version, bash-4.1-beta. | |
4264 | ||
4265 | 1. Changes to Bash | |
4266 | ||
4267 | a. Fixed a bug that caused printf to not return a partial value when it | |
4268 | encountered an error while converting an integer argument. | |
4269 | ||
4270 | b. Fixed a bug that caused setting one of the compatNN options to not | |
4271 | turn off the others. | |
4272 | ||
4273 | c. The (undocumented) --wordexp option is no longer included by default. | |
4274 | ||
4275 | d. Fixed a bug in conditional command execution that caused it to not | |
4276 | correctly ignore the exit status under certain circumstances. | |
4277 | ||
4278 | e. Added a configure-time check for correctly-working asprintf/snprintf. | |
4279 | ||
4280 | f. Fixed some problems with line number calculation and display when sourcing | |
4281 | a file in an interactive shell. | |
4282 | ||
4283 | g. Fixed a bug that caused the shell to crash when using `declare -A foo=bar'. | |
4284 | ||
4285 | h. Fixed a bug that caused an off-by-one error when calculating the directories | |
4286 | to display with the PROMPT_DIRTRIM option. | |
4287 | ||
4288 | 2. Changes to Readline | |
4289 | ||
4290 | a. Fixed a bug that caused applications using the callback interface to not | |
4291 | react to SIGINT (or other signals) until another character arrived. | |
4292 | ||
4293 | ------------------------------------------------------------------------------ | |
4294 | This document details the changes between this version, bash-4.1-beta, | |
4295 | and the previous version, bash-4.1-alpha. | |
4296 | ||
4297 | 1. Changes to Bash | |
4298 | ||
4299 | a. Fixed a bug in mapfile that caused the shell to crash if it was passed the | |
4300 | name of an associative array. | |
4301 | ||
4302 | b. Fixed a bug that caused the shell to incorrectly split case patterns if | |
4303 | they contained characters in $IFS. | |
4304 | ||
4305 | c. Fixed a bug that caused the shell to set $? to the wrong value when using | |
4306 | a construct ending with a variable assignment with set -x enabled and PS4 | |
4307 | containing a command substitution. | |
4308 | ||
4309 | d. Fixed a bug that caused the shell to read commands incorrectly if an | |
4310 | expansion error occurred under certain conditions in a user-specified | |
4311 | subshell. | |
4312 | ||
4313 | e. Fixed a bug that caused the shell to set $? incorrectly if a parse error | |
4314 | occurred in an evaluation context ("eval", trap command, dot script, etc.) | |
4315 | ||
4316 | f. Fixed a bug that caused the shell to attempt command substitution | |
4317 | completion within a single-quoted string. | |
4318 | ||
4319 | g. Fixed a bug that caused the shell to insert an extra single quote during | |
4320 | word completion. | |
4321 | ||
4322 | h. Fixed a bug that caused the shell to crash if invoked with the environment | |
4323 | variable EMACS having a null value. | |
4324 | ||
4325 | i. Fixed a bug that caused bash to incorrectly report the presence of new | |
4326 | mail in a `maildir' environment. | |
4327 | ||
4328 | j. Fixed a bug that caused the shell to not recognize a here-document ending | |
4329 | delimiter inside a command substitution. | |
4330 | ||
4331 | k. Fixed a bug that caused the shell to crash when a a dynamic array variable | |
4332 | was assigned a scalar value. | |
4333 | ||
4334 | 2. Changes to Readline | |
4335 | ||
4336 | 3. New Features in Bash | |
4337 | ||
4338 | a. The mapfile/readarray builtin no longer stores the commands it invokes via | |
4339 | callbacks in the history list. | |
4340 | ||
4341 | b. There is a new `compat40' shopt option. | |
4342 | ||
4343 | c. The < and > operators to [[ do string comparisons using the current locale | |
4344 | only if the compatibility level is greater than 40 (set to 41 by default). | |
4345 | ||
4346 | 4. New Features in Readline | |
4347 | ||
4348 | ------------------------------------------------------------------------------ | |
4349 | This document details the changes between this version, bash-4.1-alpha, | |
4350 | and the previous version, bash-4.0-release. | |
4351 | ||
4352 | 1. Changes to Bash | |
4353 | ||
4354 | a. Fixed bugs in the parser involving new parsing of the commands contained | |
4355 | in command substitution when the substitution is read. | |
4356 | ||
4357 | b. Fixed a bug that caused the shell to dump core when performing programmable | |
4358 | completion using a shell function. | |
4359 | ||
4360 | c. Fixed a bug in `mapfile' that caused it to invoke callbacks at the wrong | |
4361 | time. | |
4362 | ||
4363 | d. Fixed a bug that caused the shell to dump core when listing jobs in the | |
4364 | `exit' builtin. | |
4365 | ||
4366 | e. Fixed several bugs encountered when reading subscripts in associative | |
4367 | array assignments and expansions. | |
4368 | ||
4369 | f. Fixed a bug that under some circumstances caused an associative array to | |
4370 | be converted to an indexed array. | |
4371 | ||
4372 | g. Fixed a bug that caused syntax errors and SIGINT interrupts to not set | |
4373 | $? to a value > 128. | |
4374 | ||
4375 | h. Fixed a bug that caused the shell to remove FIFOs associated with process | |
4376 | substitution inside shell functions. | |
4377 | ||
4378 | i. Fixed a bug that caused terminal attributes to not be reset when the | |
4379 | `read' builtin timed out. | |
4380 | ||
4381 | j. Fixed a bug in brace expansion that caused unwanted zero padding of the | |
4382 | expanded terms. | |
4383 | ||
4384 | k. Fixed a bug that prevented the |& construct from working as intended when | |
4385 | used with a simple command with additional redirections. | |
4386 | ||
8868edaf | 4387 | l. Fixed a bug with the case statement ;& terminator that caused the shell to |
0001803f CR |
4388 | dereference a NULL pointer. |
4389 | ||
4390 | m. Fixed a bug that caused assignment statements or redirections preceding | |
4391 | a simple command name to inhibit alias expansion. | |
4392 | ||
4393 | n. Fixed the behavior of `set -u' to conform to the latest Posix interpretation: | |
4394 | every expansion of an unset variable except $@ and $* will cause the | |
4395 | shell to exit. | |
4396 | ||
4397 | o. Fixed a bug that caused double-quoted expansions of $* inside word | |
4398 | expansions like ${x#$*} to not expand properly when $IFS is empty. | |
4399 | ||
4400 | p. Fixed a bug that caused traps to set $LINENO to the wrong value when they | |
4401 | execute. | |
4402 | ||
4403 | q. Fixed a bug that caused off-by-one errors when computing history lines in | |
4404 | the `fc' builtin. | |
4405 | ||
4406 | r. Fixed a bug that caused some terminating signals to not exit the shell | |
4407 | quickly enough, forcing the kernel to send the signal (e.g., SIGSEGV) | |
4408 | multiple times. | |
4409 | ||
4410 | s. Fixed a bug that caused the shell to attempt to add empty lines to the | |
4411 | history list when reading here documents. | |
4412 | ||
4413 | t. Made some internal changes that dramatically speeds up sequential indexed | |
4414 | array access. | |
4415 | ||
4416 | u. Fixed a bug that caused the shell to write past the end of a string when | |
4417 | completing a double-quoted string ending in a backslash. | |
4418 | ||
4419 | v. Fixed a bug that caused the shell to replace too many characters when a | |
4420 | pattern match was null in a ${foo//bar} expansion. | |
4421 | ||
4422 | w. Fixed bugs in the expansion of ** that caused duplicate directory names | |
4423 | and the contents of the current directory to be omitted. | |
4424 | ||
4425 | x. Fixed a bug that caused $? to not be set correctly when referencing an | |
4426 | unset variable with set -u and set -e enabled. | |
4427 | ||
4428 | y. Fixed a bug caused by executing an external program from the DEBUG trap | |
4429 | while a pipeline was running. The effect was to disturb the pipeline | |
4430 | state, occasionally causing it to hang. | |
4431 | ||
4432 | z. Fixed a bug that caused the ** glob expansion to dump core if it | |
4433 | encountered an unsearchable directory. | |
4434 | ||
4435 | aa. Fixed a bug that caused `command -v' and `command -V' to not honor the | |
4436 | path set by the -p option. | |
4437 | ||
4438 | bb. Fixed a bug that caused brace expansion to take place too soon in some | |
4439 | compound array assignments. | |
4440 | ||
4441 | cc. Fixed a bug that caused programmable completion functions' changes to | |
4442 | READLINE_POINT to not be reflected back to readline. | |
4443 | ||
4444 | dd. Fixed a bug that caused the shell to dump core if a trap was executed | |
4445 | during a shell assignment statement. | |
4446 | ||
4447 | ee. Fixed an off-by-one error when computing the number of positional | |
4448 | parameters for the ${@:0:n} expansion. | |
4449 | ||
4450 | ff. Fixed a problem with setting COMP_CWORD for programmable completion | |
4451 | functions that could leave it set to -1. | |
4452 | ||
4453 | gg. Fixed a bug that caused the ERR trap to be triggered in some cases where | |
4454 | `set -e' would not have caused the shell to exit. | |
4455 | ||
4456 | hh. Fixed a bug that caused changes made by `compopt' to not persist past the | |
4457 | completion function in which compopt was executed. | |
4458 | ||
4459 | ii. Fixed a bug that caused the list of hostname completions to not be cleared | |
4460 | when HOSTNAME was unset. | |
4461 | ||
4462 | jj. Fixed a bug that caused variable expansion in here documents to look in | |
4463 | any temporary environment. | |
4464 | ||
4465 | kk. Bash and readline can now convert file names between precomposed and | |
4466 | decomposed Unicode on Mac OS X ("keyboard" and file system forms, | |
4467 | respectively). This affects filename completion (using new | |
4468 | rl_filename_rewrite_hook), globbing, and readline redisplay. | |
4469 | ||
4470 | ll. The ERR and EXIT traps now see a non-zero value for $? when a parser | |
4471 | error after set -e has been enabled causes the shell to exit. | |
4472 | ||
4473 | mm. Fixed a bug that in brace expansion that caused zero-prefixed terms to | |
4474 | not contain the correct number of digits. | |
4475 | ||
4476 | nn. Fixed a bug that caused the shell to free non-allocated memory when | |
4477 | unsetting an associative array which had had a value implicitly assigned | |
4478 | to index "0". | |
4479 | ||
4480 | oo. Fixed a memory leak in the ${!prefix@} expansion. | |
4481 | ||
4482 | pp. Fixed a bug that caused printf to not correctly report all write errors. | |
4483 | ||
4484 | qq. Fixed a bug that caused single and double quotes to act as delimiters | |
4485 | when splitting a command line into words for programmable completion. | |
4486 | ||
4487 | rr. Fixed a bug that caused ** globbing that caused **/path/* to match every | |
4488 | directory, not just those matching `path'. | |
4489 | ||
4490 | ss. Fixed a bug that caused the shell to dump core when running `help' without | |
4491 | arguments if the terminal width was fewer than 7 characters. | |
4492 | ||
4493 | 2. Changes to Readline | |
4494 | ||
4495 | a. The SIGWINCH signal handler now avoids calling the redisplay code if | |
4496 | one arrives while in the middle of redisplay. | |
4497 | ||
4498 | b. Changes to the timeout code to make sure that timeout values greater | |
4499 | than one second are handled better. | |
4500 | ||
4501 | c. Fixed a bug in the redisplay code that was triggered by a prompt | |
4502 | containing invisible characters exactly the width of the screen. | |
4503 | ||
4504 | d. Fixed a bug in the redisplay code encountered when running in horizontal | |
4505 | scroll mode. | |
4506 | ||
4507 | e. Fixed a bug that prevented menu completion from properly completing | |
4508 | filenames. | |
4509 | ||
4510 | f. Fixed a redisplay bug caused by a multibyte character causing a line to | |
4511 | wrap. | |
4512 | ||
4513 | g. Fixed a bug that caused key sequences of two characters to not be | |
4514 | recognized when a longer sequence identical in the first two characters | |
4515 | was bound. | |
4516 | ||
4517 | h. Fixed a bug that caused history expansion to be attempted on $'...' | |
4518 | single-quoted strings. | |
4519 | ||
4520 | i. Fixed a bug that caused incorrect redisplay when the prompt contained | |
4521 | multibyte characters in an `invisible' sequence bracketed by \[ and | |
4522 | \]. | |
4523 | ||
4524 | j. Fixed a bug that caused history expansion to short-circuit after | |
4525 | encountering a multibyte character. | |
4526 | ||
4527 | 3. New Features in Bash | |
4528 | ||
4529 | a. Here-documents within $(...) command substitutions may once more be | |
4530 | delimited by the closing right paren, instead of requiring a newline. | |
4531 | ||
4532 | b. Bash's file status checks (executable, readable, etc.) now take file | |
4533 | system ACLs into account on file systems that support them. | |
4534 | ||
4535 | c. Bash now passes environment variables with names that are not valid | |
4536 | shell variable names through into the environment passed to child | |
4537 | processes. | |
4538 | ||
4539 | d. The `execute-unix-command' readline function now attempts to clear and | |
4540 | reuse the current line rather than move to a new one after the command | |
4541 | executes. | |
4542 | ||
4543 | e. `printf -v' can now assign values to array indices. | |
4544 | ||
4545 | f. New `complete -E' and `compopt -E' options that work on the "empty" | |
4546 | completion: completion attempted on an empty command line. | |
4547 | ||
4548 | g. New complete/compgen/compopt -D option to define a `default' completion: | |
4549 | a completion to be invoked on command for which no completion has been | |
4550 | defined. If this function returns 124, programmable completion is | |
4551 | attempted again, allowing a user to dynamically build a set of completions | |
4552 | as completion is attempted by having the default completion function | |
4553 | install individual completion functions each time it is invoked. | |
4554 | ||
4555 | h. When displaying associative arrays, subscripts are now quoted. | |
4556 | ||
4557 | i. Changes to dabbrev-expand to make it more `emacs-like': no space appended | |
4558 | after matches, completions are not sorted, and most recent history entries | |
4559 | are presented first. | |
4560 | ||
4561 | j. The [[ and (( commands are now subject to the setting of `set -e' and the | |
4562 | ERR trap. | |
4563 | ||
4564 | k. The source/. builtin now removes NUL bytes from the file before attempting | |
4565 | to parse commands. | |
4566 | ||
4567 | l. There is a new configuration option (in config-top.h) that forces bash to | |
4568 | forward all history entries to syslog. | |
4569 | ||
4570 | m. A new variable $BASHOPTS to export shell options settable using `shopt' to | |
4571 | child processes. | |
4572 | ||
74091dd4 | 4573 | n. There is a new configure option that forces the extglob option to be |
0001803f CR |
4574 | enabled by default. |
4575 | ||
4576 | o. New variable $BASH_XTRACEFD; when set to an integer bash will write xtrace | |
4577 | output to that file descriptor. | |
4578 | ||
4579 | p. If the optional left-hand-side of a redirection is of the form {var}, the | |
4580 | shell assigns the file descriptor used to $var or uses $var as the file | |
4581 | descriptor to move or close, depending on the redirection operator. | |
4582 | ||
4583 | q. The < and > operators to the [[ conditional command now do string | |
4584 | comparison according to the current locale. | |
4585 | ||
4586 | r. Programmable completion now uses the completion for `b' instead of `a' | |
4587 | when completion is attempted on a line like: a $(b c. | |
4588 | ||
4589 | s. Force extglob on temporarily when parsing the pattern argument to | |
4590 | the == and != operators to the [[ command, for compatibility. | |
4591 | ||
4592 | t. Changed the behavior of interrupting the wait builtin when a SIGCHLD is | |
4593 | received and a trap on SIGCHLD is set to be Posix-mode only. | |
4594 | ||
4595 | u. The read builtin has a new `-N nchars' option, which reads exactly NCHARS | |
4596 | characters, ignoring delimiters like newline. | |
4597 | ||
4598 | 4. New Features in Readline | |
4599 | ||
4600 | a. New bindable function: menu-complete-backward. | |
4601 | ||
4602 | b. In the vi insertion keymap, C-n is now bound to menu-complete by default, | |
4603 | and C-p to menu-complete-backward. | |
4604 | ||
4605 | c. When in vi command mode, repeatedly hitting ESC now does nothing, even | |
4606 | when ESC introduces a bound key sequence. This is closer to how | |
4607 | historical vi behaves. | |
4608 | ||
4609 | d. New bindable function: skip-csi-sequence. Can be used as a default to | |
4610 | consume key sequences generated by keys like Home and End without having | |
4611 | to bind all keys. | |
4612 | ||
4613 | e. New application-settable function: rl_filename_rewrite_hook. Can be used | |
74091dd4 | 4614 | to rewrite or modify filenames read from the file system before they are |
0001803f CR |
4615 | compared to the word to be completed. |
4616 | ||
4617 | f. New bindable variable: skip-completed-text, active when completing in the | |
4618 | middle of a word. If enabled, it means that characters in the completion | |
4619 | that match characters in the remainder of the word are "skipped" rather | |
4620 | than inserted into the line. | |
4621 | ||
4622 | g. The pre-readline-6.0 version of menu completion is available as | |
4623 | "old-menu-complete" for users who do not like the readline-6.0 version. | |
4624 | ||
4625 | h. New bindable variable: echo-control-characters. If enabled, and the | |
4626 | tty ECHOCTL bit is set, controls the echoing of characters corresponding | |
4627 | to keyboard-generated signals. | |
4628 | ||
4629 | i. New bindable variable: enable-meta-key. Controls whether or not readline | |
4630 | sends the smm/rmm sequences if the terminal indicates it has a meta key | |
4631 | that enables eight-bit characters. | |
4632 | ||
4633 | ------------------------------------------------------------------------------ | |
17345e5a JA |
4634 | This document details the changes between this version, bash-4.0-release, |
4635 | and the previous version, bash-4.0-rc1. | |
4636 | ||
4637 | 1. Changes to Bash | |
4638 | ||
4639 | a. Changed the message printed when setlocale(3) fails to only include the | |
4640 | strerror error text if the call changes errno. | |
4641 | ||
4642 | b. Changed trap command execution to reset the line number before running a | |
4643 | trap (except DEBUG and RETURN traps). | |
4644 | ||
4645 | c. Fixed behavior of case-modifiying word expansions to not work on | |
4646 | individual words within a variable's value. | |
4647 | ||
4648 | d. Fixed a bug that caused mapfile to not be interruptible when run in an | |
4649 | interactive shell. | |
4650 | ||
4651 | e. Fixed a bug that caused mapfile to not run callbacks for the first line | |
4652 | read. | |
4653 | ||
4654 | f. Fixed a bug that caused mapfile to not honor EOF typed in an interactive | |
4655 | shell. | |
4656 | ||
4657 | g. Fixed the coprocess reaping code to not run straight from a signal handler. | |
4658 | ||
4659 | h. Fixed a bug that caused printf -b to ignore the first % conversion specifier | |
4660 | in the format string on 64-bit systems. | |
4661 | ||
4662 | i. Fixed a bug that caused incorrect word splitting when `:', `=', or `~' | |
4663 | appeared in $IFS. | |
4664 | ||
4665 | j. Fixed a bug that caused data corruption in the programmable completion code | |
4666 | when a shell function called from a completion aborted execution. | |
4667 | ||
4668 | k. Fixed a bug that caused the CPU usage reported by the `time' builtin to be | |
4669 | capped at 100%. | |
4670 | ||
4671 | l. Changed behavior of shell when -e option is in effect to reflect consensus | |
4672 | of Posix shell standardization working group. | |
4673 | ||
4674 | m. Fixed a bug introduced in bash-4.0-alpha that caused redirections to not | |
4675 | be displayed by `type' or `declare' when appearing in functions under | |
4676 | certain circumstances. | |
4677 | ||
4678 | 2. Changes to Readline | |
4679 | ||
4680 | a. Fixed a bug that caused !(...) extended glob patterns to inhibit later | |
4681 | history expansion. | |
4682 | ||
4683 | b. Reworked the signal handling to avoid calling disallowed functions from a | |
4684 | signal handler. | |
4685 | ||
4686 | 3. New Features in Bash | |
4687 | ||
4688 | a. `readarray' is now a synonym for `mapfile'. | |
4689 | ------------------------------------------------------------------------------ | |
3185942a JA |
4690 | This document details the changes between this version, bash-4.0-rc1, |
4691 | and the previous version, bash-4.0-beta2. | |
4692 | ||
4693 | 1. Changes to Bash | |
4694 | ||
4695 | a. Fixed a bug that caused parsing errors when a $()-style command | |
74091dd4 | 4696 | substitution was followed immediately by a quoted newline. |
3185942a JA |
4697 | |
4698 | b. Fixed a bug that caused extended shell globbing patterns beginning with | |
4699 | `*(' to not work when used with pattern substitution word expansions. | |
4700 | ||
4701 | ------------------------------------------------------------------------------ | |
4702 | This document details the changes between this version, bash-4.0-beta2, | |
4703 | and the previous version, bash-4.0-beta. | |
4704 | ||
4705 | 1. Changes to Bash | |
4706 | ||
4707 | a. Fixed a bug that caused failed word expansions to set $? but not | |
4708 | PIPESTATUS. | |
4709 | ||
4710 | b. Changed filename completion to quote the tilde in a filename with a | |
4711 | leading tilde that exists in the current directory. | |
4712 | ||
4713 | c. Fixed a bug that caused a file descriptor leak when performing | |
4714 | redirections attached to a compound command. | |
4715 | ||
4716 | d. Fixed a bug that caused expansions of $@ and $* to not exit the shell if | |
4717 | the -u option was enabled and there were no posititional parameters. | |
4718 | ||
4719 | e. Fixed a bug that resulted in bash not terminating immediately if a | |
4720 | terminating signal was received while performing output. | |
4721 | ||
4722 | f. Fixed a bug that caused the shell to crash after creating 256 process | |
4723 | substitutions during word completion. | |
4724 | ||
4725 | 2. Changes to Readline | |
4726 | ||
4727 | a. Fixed a bug that caused redisplay errors when using prompts with invisible | |
4728 | characters and numeric arguments to a command in a multibyte locale. | |
4729 | ||
4730 | b. Fixed a bug that caused redisplay errors when using prompts with invisible | |
4731 | characters spanning more than two physical screen lines. | |
4732 | ||
4733 | ------------------------------------------------------------------------------ | |
4734 | This document details the changes between this version, bash-4.0-beta, | |
17345e5a | 4735 | and the previous version, bash-4.0-alpha. |
3185942a JA |
4736 | |
4737 | 1. Changes to Bash | |
4738 | ||
4739 | a. Fixed a typo that caused a variable to be used before initialization | |
4740 | while parsing Posix-style command substitutions. | |
4741 | ||
4742 | b. Fixed a bug that caused stray ^? when the expansion of a parameter used | |
4743 | as part of a pattern removal expansion is empty, but part of a non- | |
4744 | empty string. | |
4745 | ||
4746 | c. Fixed a bug that could cause strings not converted to numbers by strtol | |
4747 | to be treated as if the conversion had been successful. | |
4748 | ||
4749 | d. The `return' builtin now accepts no options and requires a `--' before | |
4750 | a negative return value, as Posix requires. | |
4751 | ||
4752 | e. Fixed a bug that caused local variables to be created with the empty | |
4753 | string for a value rather than no value. | |
4754 | ||
4755 | f. Changed behavior so the shell now acts as if it received an interrupt | |
4756 | when a pipeline is killed by SIGINT while executing a list. | |
4757 | ||
4758 | g. Fixed a bug that caused `declare var' and `typeset var' to initialize | |
4759 | `var' to the empty string. | |
4760 | ||
4761 | h. Changed `bind' builtin to print a warning but proceed if invoked when | |
4762 | line editing is not active. | |
4763 | ||
4764 | i. Fixed a bug that caused the shell to exit when the `errexit' option is | |
4765 | set and a command in a pipeline returns a non-zero exit status. | |
4766 | ||
4767 | j. Fixed a bug that caused the shell to not run the exit trap in a command | |
4768 | run with `bash -c' under some circumstances. | |
4769 | ||
4770 | k. Fixed a bug that caused parser errors to occasionally not set $? when | |
4771 | running commands with `eval'. | |
4772 | ||
4773 | l. Fixed a bug that caused stray control characters when evaluating compound | |
4774 | array assignments containing $'\x7f' escapes. | |
4775 | ||
4776 | m. Fixed a bug that caused redirections involving file descriptor 10 as the | |
4777 | target to behave incorrectly. | |
4778 | ||
4779 | n. Fixed a bug that could cause memory to be freed multiple times when | |
4780 | assigning to COMP_WORDBREAKS. | |
4781 | ||
4782 | o. Fixed a bug that could cause NULL pointer dereferences when COMP_WORDBREAKS | |
4783 | was unset. | |
4784 | ||
4785 | 2. Changes to Readline | |
4786 | ||
4787 | 3. New Features in Bash | |
4788 | ||
4789 | a. A value of 0 for the -t option to `read' now returns success if there is | |
4790 | input available to be read from the specified file descriptor. | |
4791 | ||
4792 | b. CDPATH and GLOBIGNORE are ignored when the shell is running in privileged | |
4793 | mode. | |
4794 | ||
4795 | c. New bindable readline functions shell-forward-word and shell-backward-word, | |
4796 | which move forward and backward words delimited by shell metacharacters | |
4797 | and honor shell quoting. | |
4798 | ||
4799 | d. New bindable readline functions shell-backward-kill-word and shell-kill-word | |
4800 | which kill words backward and forward, but use the same word boundaries | |
4801 | as shell-forward-word and shell-backward-word. | |
4802 | ||
4803 | 4. New Features in Readline | |
4804 | ||
4805 | a. If the kernel supports it, readline displays special characters | |
4806 | corresponding to a keyboard-generated signal when the signal is received. | |
4807 | ||
4808 | ------------------------------------------------------------------------------ | |
4809 | This document details the changes between this version, bash-4.0-alpha, | |
4810 | and the previous version, bash-3.2-release. | |
4811 | ||
4812 | 1. Changes to Bash | |
4813 | ||
4814 | a. Fixed several bugs in old-style `` command substitution parsing, including | |
4815 | comment parsing and quoted string handling. | |
4816 | ||
4817 | b. Fixed problems parsing arguments to the [[ command's =~ regular expression | |
4818 | matching operator: metacharacter and whitespace parsing. | |
4819 | ||
4820 | c. Fixed a bug that caused the shell to inappropriately reuse high-numbered | |
4821 | file descriptors it used internally. | |
4822 | ||
4823 | d. Fixed a bug in pattern replacement word expansions that caused a `/' as | |
4824 | the first character of an expanded pattern to be mistaken for a global | |
4825 | replacement specifier. | |
4826 | ||
4827 | e. Fixed several problems with the asprintf and snprintf replacement functions | |
4828 | that caused hangs and crashes. | |
4829 | ||
4830 | f. Fixed a bug in the calculation of the current and previous job that caused | |
4831 | it to refer to incorrect jobs. | |
4832 | ||
4833 | g. Fixed a bug in the check for the validity of a hashed command pathname that | |
4834 | caused unnecessary hash table deletions and additions. | |
4835 | ||
4836 | h. Fixed a bug that caused child processes to inherit the wrong value for $!. | |
4837 | ||
4838 | i. Fixed a bug that caused `.' to fail to read and execute commands from non- | |
4839 | regular files such as devices or named pipes. | |
4840 | ||
4841 | j. Fixed a bug in printf formatting for the %x and %X expansions that occurred | |
4842 | on some systems. | |
4843 | ||
4844 | k. Fixed a bug that caused the shell to crash when creating temporary files if | |
4845 | $TMPDIR named a non-writable directory. | |
4846 | ||
4847 | l. Fixed a bug that caused the shell to ignore $TMPDIR when creating temporary | |
4848 | files under some circumstances. | |
4849 | ||
4850 | m. Fixed a bug that caused named pipes created by process substitution to not | |
4851 | be cleaned up. | |
4852 | ||
4853 | n. Fixed a bug that caused HISTTIMEFORMAT to not be honored when it appeared | |
4854 | in the initial shell environment. | |
4855 | ||
4856 | o. Fixed several bugs in the expansion of $* and $@ (quoted and unquoted) | |
4857 | when IFS is null or contains non-whitespace characters; the same changes | |
4858 | apply to arrays subscripted with * or @. | |
4859 | ||
4860 | p. Fixed several problems with pattern substitution expansions on the | |
4861 | positional parameters and arrays subscripted with * or @ that occurred | |
4862 | when $IFS was set to the empty string. | |
4863 | ||
4864 | q. Made a change to the default locale initialization code that should | |
4865 | result in better behavior from the locale-aware library functions. | |
4866 | ||
4867 | r. Fixed a bug that caused compacting the jobs list to drop jobs. | |
4868 | ||
4869 | s. Fixed a bug that caused jumps back to the top-level processing loop from | |
4870 | a builtin command to leave the shell in an inconsistent state. | |
4871 | ||
4872 | t. Fixed a bug that caused characters that would be escaped internally to be | |
4873 | doubled when escaped with a backslash. | |
4874 | ||
4875 | u. Fixed the initialization of mailboxes to not cause maildirs to be read | |
4876 | (and stat(2) called for every message file) at shell startup. | |
4877 | ||
4878 | v. Fixed a bug that caused the shell to not display $PS2 when the read builtin | |
4879 | reads a line continued with a backslash. | |
4880 | ||
4881 | w. Fixed a bug that caused errors in word splitting when $IFS contained | |
4882 | characters used for internal quoting. | |
4883 | ||
4884 | x. Fixed bugs that caused problems with output from shell builtins not being | |
4885 | completely displayed on some systems. | |
4886 | ||
4887 | y. Fixed a bug that caused output to be lost when a redirection is acting on | |
4888 | the shell's output file descriptor. | |
4889 | ||
4890 | z. Fixed bugs caused by shell builtins not checking for all write errors. | |
4891 | ||
4892 | aa. Fixed a problem that caused the shell to dump core if expansions on the | |
4893 | pattern passed to the pattern removal word expansions resulted in expansion | |
4894 | errors. | |
4895 | ||
4896 | bb. Fixed a bug that caused bash to loop infinitely after creating and | |
4897 | waiting for 4096 jobs. | |
4898 | ||
4899 | cc. Fixed a bug that caused bash to lose the status of a background job under | |
4900 | certain circumstances. | |
4901 | ||
4902 | dd. Fixed a bug that caused bash to not look in the temporary environment | |
4903 | when performing variable lookup under certain circumstances. | |
4904 | ||
4905 | ee. Fixed a bug that caused bash to close file descriptors greater than 10 | |
4906 | when they were used in redirections. | |
4907 | ||
4908 | ff. Fixed a problem that caused the shell to attempt to read from the standard | |
4909 | input when called as `bash -i script'. | |
4910 | ||
4911 | gg. Fixed a memory leak and variable initialization problems when the -v option | |
4912 | was supplied to `printf' that could cause incorrect results. | |
4913 | ||
4914 | hh. Fixed a bug that caused the `read' builtin to count bytes when the -n option | |
4915 | was supplied, rather than (possibly multibyte) characters. | |
4916 | ||
4917 | ii. Fixed a bug when displaying a function due to not converting the function | |
4918 | to an external form. | |
4919 | ||
4920 | jj. Changed job control initialization to ensure that the shell has a tty | |
4921 | as its controlling terminal before enabling job control. | |
4922 | ||
4923 | kk. Fixed a bug with the `test' builtin that caused it to misinterpret | |
4924 | arguments beginning with `-' but containing more than one character. | |
4925 | ||
4926 | ll. Fixed bug that could cause the shell to dump core in certain cases where | |
4927 | a command sets the SIGINT disposition to the default. | |
4928 | ||
4929 | mm. Fixed a bug in the pattern replacement (affecting both word expansion | |
4930 | and the `fc' builtin) that occurred when the pattern and replacement | |
4931 | strings were empty. | |
4932 | ||
4933 | nn. Fixed a bug that caused an arithmetic evaluation error to disable all | |
4934 | further evaluation. | |
4935 | ||
4936 | oo. Fixed a bug in pathname expansion that caused it to interpret backslashes | |
4937 | in the pathname as quoting characters. | |
4938 | ||
4939 | pp. Fixed a bug in the replacement getcwd() implementation that could cause | |
4940 | memory to be overwritten. | |
4941 | ||
4942 | qq. When in Posix mode, the `ulimit' builtin now uses a block size of 512 for | |
4943 | the `-c' and `-f' options. | |
4944 | ||
4945 | rr. Brace expansion now allows process substitutions to pass through unchanged. | |
4946 | ||
4947 | ss. Fixed a problem in the command name completion code to avoid quoting | |
4948 | escaped special characters twice when the command name begins with a tilde. | |
4949 | ||
4950 | tt. Fixed a problem in the printf builtin that resulted in single-byte | |
4951 | output for the "'" escape, even when using multibyte characters. | |
4952 | ||
4953 | uu. Fixed a bug that caused the failure exit status to be lost when redirections | |
4954 | attached to a compound command failed. | |
4955 | ||
4956 | vv. Fixed a bug that caused the internal random number generator to not be | |
4957 | re-seeded correctly when creating a subshell. | |
4958 | ||
4959 | ww. Fixed a bug that could cause the bash replacement getcwd to overwrite | |
4960 | memory. | |
4961 | ||
4962 | xx. Fixed a bug that caused the shell to not receive SIGINT if it was sent | |
4963 | while the shell was waiting for a command substitution to terminate, and | |
4964 | make sure the exit status is correct when it does. | |
4965 | ||
4966 | yy. Fixed a bug that resulted in the second and subsequent children spawned | |
4967 | by a shell begun to run a command substitution being placed into the | |
4968 | wrong process group. | |
4969 | ||
4970 | zz. Fixed a bug that caused the results of successful tilde expansion to be | |
4971 | subject to pathname expansion and word splitting. | |
4972 | ||
4973 | aaa. Fixed a bug that could cause the shell to hang if it encountered an | |
4974 | error that caused it to jump back to the top processing loop during a | |
4975 | command substitution or `eval' command. | |
4976 | ||
4977 | bbb. Fixed a bug that caused the `read' builtin to use the tty's attributes | |
4978 | instead of those of the file descriptor passed with the -u option when | |
4979 | processing the -n and -d options. | |
4980 | ||
4981 | ccc. Fixed a bug that caused incorrect expansion of ${array[@]:foo} if the | |
4982 | first character of $IFS was not whitespace. | |
4983 | ||
4984 | ddd. Fixed a bug that occurred when scanning for the ending delimiter of a | |
4985 | ${parameter/pat/sub} expansion. | |
4986 | ||
4987 | eee. Fixed a bug that caused the shell to inappropriately expand command | |
4988 | substitutions in words when expanding directory names for completion. | |
4989 | ||
4990 | fff. Fixed a bug that caused the `fc' builtin to look too far back in the | |
4991 | history list under certain circumstances. | |
4992 | ||
4993 | ggg. Fixed a bug that caused a shell running in Posix mode to search $PWD for | |
4994 | a file specified as an argument to source/. when the file was not found | |
4995 | in $PATH. | |
4996 | ||
4997 | hhh. Fixed a bug that caused the shell to modify the case of a command word | |
4998 | found via command completion when the shell was performing case- | |
4999 | insensitive completion. | |
5000 | ||
5001 | iii. Fixed a bug that caused the shell to search $PATH for an argument to | |
5002 | source/. even when it contained a `/'. | |
5003 | ||
5004 | jjj. Fixed a bug that caused brace expansion to misorder expansions when the | |
5005 | locale did not have a collating order like aAbBcC...zZ. | |
5006 | ||
5007 | kkk. Fixed a bug that did not allow `set +o history' to have any effect when | |
5008 | run in a startup file or from a sourced file. | |
5009 | ||
5010 | lll. Fixed a bug with the precedence of the ?: conditional arithmetic operator. | |
5011 | ||
5012 | mmm. Fixed a bug that caused side effects of temporary variable assignments | |
5013 | to persist in the shell environment. | |
5014 | ||
5015 | nnn. Fixed a bug that caused the terminal to be left in non-canonical mode | |
5016 | when using editing commands that invoke the an editor on the current | |
5017 | command line. | |
5018 | ||
5019 | ooo. Fixed a bug that caused globbing characters and characters in $IFS to not | |
5020 | be quoted appropriately when displaying assignment statements. | |
5021 | ||
5022 | ppp. Fixed a bug that caused the `-e' option to be inherited when sourcing a | |
5023 | file or evaluating a command with `eval' even if the return value of the | |
5024 | command was supposed to be ignored. | |
5025 | ||
5026 | qqq. Fixed a bug that caused the shell to attempt to created variables with | |
5027 | invalid names if such names appeared in the initial environment. | |
5028 | ||
5029 | rrr. Fixed a bug with quote removal in strings where the final character is a | |
5030 | backslash. | |
5031 | ||
5032 | sss. Fixed a bug that caused the effects of special variables to persist even | |
5033 | when the variables were unset as part of the shell reinitializing itself | |
5034 | to execute a shell script. | |
5035 | ||
5036 | ttt. Fixed a bug that caused the history to not be saved after `history -c' or | |
5037 | `history -d' was executed until a sufficient number of commands had been | |
5038 | saved to the history. | |
5039 | ||
5040 | uuu. Bash now parses command substitutions according to Posix rules: parsing | |
5041 | the command contained in $() to find the closing delimiter. | |
5042 | ||
5043 | vvv. Fixed a bug that caused traps on SIGCHLD set in a SIGCHLD handler to | |
5044 | not persist. | |
5045 | ||
5046 | www. Fixed a bug that didn't allow SIGCHLD to interrupt the `wait' builtin | |
5047 | as Posix specifies. | |
5048 | ||
5049 | xxx. Invalid numeric arguments to shell builtins no longer cause the shell to | |
5050 | short-circuit any executing compound command. | |
5051 | ||
5052 | yyy. Fixed a bug that caused the exit status to be lost when `break' was | |
5053 | used to short-circuit a loop's execution. | |
5054 | ||
5055 | zzz. Fixed a bug that caused stray ^? characters to be left in expansions of | |
5056 | "${array[*]}". | |
5057 | ||
5058 | aaaa. Bash now prints better error messages for here documents terminated by | |
5059 | EOF and for identifying the incorrect token in an invalid arithmetic | |
5060 | expression. | |
5061 | ||
5062 | bbbb. Fixed a bug in the variable length word expansion that caused it to | |
5063 | incorrectly calculate the number of multibyte characters. | |
5064 | ||
5065 | cccc. Fixed a race condition that could result in the top-level shell setting | |
5066 | the terminal's process group to an incorrect value if the process | |
5067 | group was changed by a child of a child of the shell. | |
5068 | ||
5069 | dddd. Fixed a bug that caused here documents belonging to commands within a | |
5070 | compound command to be displayed in a syntactially-incorrect form, which | |
5071 | prevented them from being re-read as input. | |
5072 | ||
5073 | eeee. The shell displays more warnings about failures to set the locale. | |
5074 | ||
5075 | ffff. Fixed a bug that caused the body of a here-document to not be saved to | |
5076 | the history list. | |
5077 | ||
5078 | gggg. Fixed a bug that caused configure to incorrectly conclude that FreeBSD | |
5079 | had /dev/fd available, resulting in problems with process substitution. | |
5080 | ||
5081 | 2. Changes to Readline | |
5082 | ||
5083 | a. Fixed a number of redisplay errors in environments supporting multibyte | |
5084 | characters. | |
5085 | ||
5086 | b. Fixed bugs in vi command mode that caused motion commands to inappropriately | |
5087 | set the mark. | |
5088 | ||
5089 | c. When using the arrow keys in vi insertion mode, readline allows movement | |
5090 | beyond the current end of the line (unlike command mode). | |
5091 | ||
5092 | d. Fixed bugs that caused readline to loop when the terminal has been taken | |
5093 | away and reads return -1/EIO. | |
5094 | ||
5095 | e. Fixed bugs in redisplay occurring when displaying prompts containing | |
5096 | invisible characters. | |
5097 | ||
5098 | f. Fixed a bug that caused the completion append character to not be reset to | |
5099 | the default after an application-specified completion function changed it. | |
5100 | ||
5101 | g. Fixed a problem that caused incorrect positioning of the cursor while in | |
5102 | emacs editing mode when moving forward at the end of a line while using | |
5103 | a locale supporting multibyte characters. | |
5104 | ||
5105 | h. Fixed an off-by-one error that caused readline to drop every 511th | |
5106 | character of buffered input. | |
5107 | ||
5108 | i. Fixed a bug that resulted in SIGTERM not being caught or cleaned up. | |
5109 | ||
5110 | j. Fixed redisplay bugs caused by multiline prompts with invisible characters | |
5111 | or no characters following the final newline. | |
5112 | ||
5113 | k. Fixed redisplay bug caused by prompts consisting solely of invisible | |
5114 | characters. | |
5115 | ||
5116 | l. Fixed a bug in the code that buffers characters received very quickly in | |
5117 | succession which caused characters to be dropped. | |
5118 | ||
5119 | m. Fixed a bug that caused readline to reference uninitialized data structures | |
8868edaf | 5120 | if it received a SIGWINCH before completing initialization. |
3185942a JA |
5121 | |
5122 | n. Fixed a bug that caused the vi-mode `last command' to be set incorrectly | |
5123 | and therefore unrepeatable. | |
5124 | ||
5125 | o. Fixed a bug that caused readline to disable echoing when it was being used | |
5126 | with an output file descriptor that was not a terminal. | |
5127 | ||
5128 | p. Readline now blocks SIGINT while manipulating internal data structures | |
5129 | during redisplay. | |
5130 | ||
5131 | q. Fixed a bug in redisplay that caused readline to segfault when pasting a | |
5132 | very long line (over 130,000 characters). | |
5133 | ||
5134 | r. Fixed bugs in redisplay when using prompts with no visible printing | |
5135 | characters. | |
5136 | ||
5137 | 3. New Features in Bash | |
5138 | ||
5139 | a. When using substring expansion on the positional parameters, a starting | |
5140 | index of 0 now causes $0 to be prefixed to the list. | |
5141 | ||
5142 | b. The `help' builtin now prints its columns with entries sorted vertically | |
5143 | rather than horizontally. | |
5144 | ||
5145 | c. There is a new variable, $BASHPID, which always returns the process id of | |
5146 | the current shell. | |
5147 | ||
5148 | d. There is a new `autocd' option that, when enabled, causes bash to attempt | |
5149 | to `cd' to a directory name that is supplied as the first word of a | |
5150 | simple command. | |
5151 | ||
5152 | e. There is a new `checkjobs' option that causes the shell to check for and | |
5153 | report any running or stopped jobs at exit. | |
5154 | ||
5155 | f. The programmable completion code exports a new COMP_TYPE variable, set to | |
5156 | a character describing the type of completion being attempted. | |
5157 | ||
5158 | g. The programmable completion code exports a new COMP_KEY variable, set to | |
5159 | the character that caused the completion to be invoked (e.g., TAB). | |
5160 | ||
5161 | h. If creation of a child process fails due to insufficient resources, bash | |
5162 | will try again several times before reporting failure. | |
5163 | ||
5164 | i. The programmable completion code now uses the same set of characters as | |
5165 | readline when breaking the command line into a list of words. | |
5166 | ||
5167 | j. The block multiplier for the ulimit -c and -f options is now 512 when in | |
5168 | Posix mode, as Posix specifies. | |
5169 | ||
5170 | k. Changed the behavior of the read builtin to save any partial input received | |
5171 | in the specified variable when the read builtin times out. This also | |
5172 | results in variables specified as arguments to read to be set to the empty | |
5173 | string when there is no input available. When the read builtin times out, | |
5174 | it returns an exit status greater than 128. | |
5175 | ||
5176 | l. The shell now has the notion of a `compatibility level', controlled by | |
5177 | new variables settable by `shopt'. Setting this variable currently | |
5178 | restores the bash-3.1 behavior when processing quoted strings on the rhs | |
5179 | of the `=~' operator to the `[[' command. | |
5180 | ||
5181 | m. The `ulimit' builtin now has new -b (socket buffer size) and -T (number | |
5182 | of threads) options. | |
5183 | ||
5184 | n. The -p option to `declare' now displays all variable values and attributes | |
5185 | (or function values and attributes if used with -f). | |
5186 | ||
5187 | o. There is a new `compopt' builtin that allows completion functions to modify | |
5188 | completion options for existing completions or the completion currently | |
5189 | being executed. | |
5190 | ||
5191 | p. The `read' builtin has a new -i option which inserts text into the reply | |
5192 | buffer when using readline. | |
5193 | ||
5194 | q. A new `-E' option to the complete builtin allows control of the default | |
5195 | behavior for completion on an empty line. | |
5196 | ||
5197 | r. There is now limited support for completing command name words containing | |
5198 | globbing characters. | |
5199 | ||
5200 | s. Changed format of internal help documentation for all builtins to roughly | |
5201 | follow man page format. | |
5202 | ||
5203 | t. The `help' builtin now has a new -d option, to display a short description, | |
5204 | and a -m option, to print help information in a man page-like format. | |
5205 | ||
5206 | u. There is a new `mapfile' builtin to populate an array with lines from a | |
5207 | given file. | |
5208 | ||
5209 | v. If a command is not found, the shell attempts to execute a shell function | |
5210 | named `command_not_found_handle', supplying the command words as the | |
5211 | function arguments. | |
5212 | ||
5213 | w. There is a new shell option: `globstar'. When enabled, the globbing code | |
5214 | treats `**' specially -- it matches all directories (and files within | |
5215 | them, when appropriate) recursively. | |
5216 | ||
5217 | x. There is a new shell option: `dirspell'. When enabled, the filename | |
5218 | completion code performs spelling correction on directory names during | |
5219 | completion. | |
5220 | ||
5221 | y. The `-t' option to the `read' builtin now supports fractional timeout | |
5222 | values. | |
5223 | ||
5224 | z. Brace expansion now allows zero-padding of expanded numeric values and | |
5225 | will add the proper number of zeroes to make sure all values contain the | |
5226 | same number of digits. | |
5227 | ||
5228 | aa. There is a new bash-specific bindable readline function: `dabbrev-expand'. | |
5229 | It uses menu completion on a set of words taken from the history list. | |
5230 | ||
5231 | bb. The command assigned to a key sequence with `bind -x' now sets two new | |
5232 | variables in the environment of the executed command: READLINE_LINE_BUFFER | |
5233 | and READLINE_POINT. The command can change the current readline line | |
5234 | and cursor position by modifying READLINE_LINE_BUFFER and READLINE_POINT, | |
5235 | respectively. | |
5236 | ||
0001803f | 5237 | cc. There is a new &>> redirection operator, which appends the standard output |
3185942a JA |
5238 | and standard error to the named file. |
5239 | ||
5240 | dd. The parser now understands `|&' as a synonym for `2>&1 |', which redirects | |
5241 | the standard error for a command through a pipe. | |
5242 | ||
5243 | ee. The new `;&' case statement action list terminator causes execution to | |
5244 | continue with the action associated with the next pattern in the | |
5245 | statement rather than terminating the command. | |
5246 | ||
5247 | ff. The new `;;&' case statement action list terminator causes the shell to | |
5248 | test the next set of patterns after completing execution of the current | |
5249 | action, rather than terminating the command. | |
5250 | ||
5251 | gg. The shell understands a new variable: PROMPT_DIRTRIM. When set to an | |
5252 | integer value greater than zero, prompt expansion of \w and \W will | |
5253 | retain only that number of trailing pathname components and replace | |
5254 | the intervening characters with `...'. | |
5255 | ||
5256 | hh. There are new case-modifying word expansions: uppercase (^[^]) and | |
5257 | lowercase (,[,]). They can work on either the first character or | |
5258 | array element, or globally. They accept an optional shell pattern | |
5259 | that determines which characters to modify. There is an optionally- | |
5260 | configured feature to include capitalization operators. | |
5261 | ||
5262 | ii. The shell provides associative array variables, with the appropriate | |
5263 | support to create, delete, assign values to, and expand them. | |
5264 | ||
5265 | jj. The `declare' builtin now has new -l (convert value to lowercase upon | |
5266 | assignment) and -u (convert value to uppercase upon assignment) options. | |
5267 | There is an optionally-configurable -c option to capitalize a value at | |
5268 | assignment. | |
5269 | ||
5270 | kk. There is a new `coproc' reserved word that specifies a coprocess: an | |
5271 | asynchronous command run with two pipes connected to the creating shell. | |
5272 | Coprocs can be named. The input and output file descriptors and the | |
5273 | PID of the coprocess are available to the calling shell in variables | |
5274 | with coproc-specific names. | |
5275 | ||
5276 | 4. New Features in Readline | |
5277 | ||
5278 | a. A new variable, rl_sort_completion_matches; allows applications to inhibit | |
5279 | match list sorting (but beware: some things don't work right if | |
5280 | applications do this). | |
5281 | ||
5282 | b. A new variable, rl_completion_invoking_key; allows applications to discover | |
5283 | the key that invoked rl_complete or rl_menu_complete. | |
5284 | ||
5285 | c. The functions rl_block_sigint and rl_release_sigint are now public and | |
5286 | available to calling applications who want to protect critical sections | |
5287 | (like redisplay). | |
5288 | ||
5289 | d. The functions rl_save_state and rl_restore_state are now public and | |
5290 | available to calling applications; documented rest of readline's state | |
5291 | flag values. | |
5292 | ||
5293 | e. A new user-settable variable, `history-size', allows setting the maximum | |
5294 | number of entries in the history list. | |
5295 | ||
5296 | f. There is a new implementation of menu completion, with several improvements | |
5297 | over the old; the most notable improvement is a better `completions | |
5298 | browsing' mode. | |
5299 | ||
5300 | g. The menu completion code now uses the rl_menu_completion_entry_function | |
5301 | variable, allowing applications to provide their own menu completion | |
5302 | generators. | |
5303 | ||
5304 | h. There is support for replacing a prefix of a pathname with a `...' when | |
5305 | displaying possible completions. This is controllable by setting the | |
5306 | `completion-prefix-display-length' variable. Matches with a common prefix | |
5307 | longer than this value have the common prefix replaced with `...'. | |
5308 | ||
5309 | i. There is a new `revert-all-at-newline' variable. If enabled, readline will | |
5310 | undo all outstanding changes to all history lines when `accept-line' is | |
5311 | executed. | |
5312 | ||
5313 | ------------------------------------------------------------------------------ | |
0628567a JA |
5314 | This document details the changes between this version, bash-3.2-release, |
5315 | and the previous version, bash-3.2-beta. | |
5316 | ||
5317 | 1. Changes to Bash | |
5318 | ||
5319 | a. Fixed a bug that caused the temporary environment passed to a command to | |
5320 | affect the shell's environment under certain circumstances. | |
5321 | ||
5322 | b. Fixed a bug in the printf builtin that caused the %q format specifier to | |
5323 | ignore empty string arguments. | |
5324 | ||
5325 | c. Improved multibyte character environment detection at configuration time. | |
5326 | ||
5327 | d. Fixed a bug in the read builtin that left spurious escape characters in the | |
5328 | input after processing backslashes when assigning to an array variable. | |
5329 | ||
5330 | 2. Changes to Readline | |
5331 | ||
5332 | a. Fixed a redisplay bug that occurred in multibyte-capable locales when the | |
5333 | prompt was one character longer than the screen width. | |
5334 | ------------------------------------------------------------------------------ | |
5335 | This document details the changes between this version, bash-3.2-beta, | |
5336 | and the previous version, bash-3.2-alpha. | |
5337 | ||
5338 | 1. Changes to Bash | |
5339 | ||
5340 | a. Changed the lexical analyzer to treat locale-specific blank characters as | |
5341 | white space. | |
5342 | ||
5343 | b. Fixed a bug in command printing to avoid confusion between redirections and | |
5344 | process substitution. | |
5345 | ||
5346 | c. Fixed problems with cross-compiling originating from inherited environment | |
5347 | variables. | |
5348 | ||
5349 | d. Added write error reporting to printf builtin. | |
5350 | ||
5351 | e. Fixed a bug in the variable expansion code that could cause a core dump in | |
5352 | a multi-byte locale. | |
5353 | ||
5354 | f. Fixed a bug that caused substring expansion of a null string to return | |
5355 | incorrect results. | |
5356 | ||
5357 | g. BASH_COMMAND now retains its previous value while executing commands as the | |
5358 | result of a trap, as the documentation states. | |
5359 | ||
5360 | 2. Changes to Readline | |
5361 | ||
5362 | a. Fixed a bug with prompt redisplay in a multi-byte locale to avoid redrawing | |
5363 | the prompt and input line multiple times. | |
5364 | ||
5365 | b. Fixed history expansion to not be confused by here-string redirection. | |
5366 | ||
5367 | c. Readline no longer treats read errors by converting them to newlines, as | |
5368 | it does with EOF. This caused partial lines to be returned from readline(). | |
5369 | ||
5370 | ------------------------------------------------------------------------------ | |
5371 | This document details the changes between this version, bash-3.2-alpha, | |
5372 | and the previous version, bash-3.1-release. | |
5373 | ||
5374 | 1. Changes to Bash | |
5375 | ||
5376 | a. Fixed a source bug that caused the minimal configuration to not compile. | |
5377 | ||
5378 | b. Fixed memory leaks in error handling for the `read' builtin. | |
5379 | ||
5380 | c. Changed the [[ and (( compound commands to set PIPESTATUS with their exit | |
5381 | status. | |
5382 | ||
5383 | d. Fixed some parsing problems with compound array assignments. | |
5384 | ||
5385 | e. Added additional configuration changes for: NetBSD (incomplete multibyte | |
5386 | character support) | |
5387 | ||
5388 | f. Fixed two bugs with local array variable creation when shadowing a variable | |
5389 | of the same name from a previous context. | |
5390 | ||
5391 | g. Fixed the `read' builtin to restore the correct set of completion functions | |
5392 | if a timeout occurs. | |
5393 | ||
5394 | h. Added code to defer the initialization of HISTSIZE (and its stifling of the | |
5395 | history list) until the history file is loaded, allowing a startup file to | |
5396 | override the default value. | |
5397 | ||
5398 | i. Tightened up the arithmetic expression parsing to produce better error | |
5399 | messages when presented with invalid operators. | |
5400 | ||
5401 | j. Fixed the cross-compilation support to build the signal list at shell | |
5402 | invocation rather than compile time if cross-compiling. | |
5403 | ||
5404 | k. Fixed multibyte support for non-gcc compilers (or compilers that do not | |
5405 | allow automatic array variable sizing based on a non-constant value). | |
5406 | ||
5407 | l. Several fixes to the code that manages the list of terminated jobs and | |
5408 | their exit statuses, and the list of active and recently-terminated jobs | |
5409 | to avoid pid aliasing/wraparound and allocation errors. | |
5410 | ||
5411 | m. Fixed a problem that allowed scripts to die due to SIGINT while waiting | |
5412 | for children, even when started in the background or otherwise ignoring | |
5413 | SIGINT. | |
5414 | ||
5415 | n. Fixed a bug that caused shells invoked as -/bin/bash from not being | |
5416 | recognized as login shells. | |
5417 | ||
5418 | o. Fixed a problem that caused shells in the background to give the terminal | |
5419 | to a process group other than the foreground shell process group. | |
5420 | ||
5421 | p. Fixed a problem with extracting the `varname' in ${#varname}. | |
5422 | ||
5423 | q. Fixed the code that handles SIGQUIT to not exit immediately -- thereby | |
5424 | calling functions that may not be called in a signal handler context -- | |
5425 | but set a flag and exit afterward (like SIGINT). | |
5426 | ||
5427 | r. Changed the brace expansion code to skip over braces that don't begin a | |
5428 | valid matched brace expansion construct. | |
5429 | ||
5430 | s. Fixed `typeset' and `declare' to not require that their shell function | |
5431 | operands to be valid shell identifiers. | |
5432 | ||
5433 | t. Changed `test' to use access(2) with a temporary uid/euid swap when testing | |
5434 | file attributes and running setuid, and access(2) in most other cases. | |
5435 | ||
5436 | u. Changed completion code to not attempt command name completion on a line | |
5437 | consisting solely of whitespace when no_empty_command_completion is set. | |
5438 | ||
5439 | v. The `hash' builtin now prints nothing in posix mode when the hash table is | |
5440 | empty, and prints a message to that effect to stdout instead of stderr | |
5441 | when not in posix mode. | |
5442 | ||
5443 | w. Fixed a bug in the extended pattern matching code that caused it to fail to | |
5444 | match periods with certain patterns. | |
5445 | ||
5446 | x. Fixed a bug that caused the shell to dump core when performing filename | |
5447 | generation in directories with thousands of files. | |
5448 | ||
5449 | y. Returned to the original Bourne shell rules for parsing ``: no recursive | |
5450 | parsing of embedded quoted strings or ${...} constructs. | |
5451 | ||
8868edaf | 5452 | z. The inheritance of the DEBUG, RETURN, and ERR traps is now dependent only |
0628567a JA |
5453 | on the settings of the `functrace' and `errtrace' shell options, rather |
5454 | than whether or not the shell is in debugging mode. | |
5455 | ||
5456 | aa. Fixed a problem with $HOME being converted to ~ in the expansion of | |
5457 | members of the DIRSTACK array. | |
5458 | ||
5459 | bb. Fixed a problem with quoted arguments to arithmetic expansions in certain | |
5460 | constructs. | |
5461 | ||
5462 | cc. The command word completion code now no longer returns matching directories | |
5463 | while searching $PATH. | |
5464 | ||
5465 | dd. Fixed a bug with zero-padding and precision handling in snprintf() | |
5466 | replacement. | |
5467 | ||
5468 | ee. Fixed a bug that caused the command substitution code not to take embedded | |
5469 | shell comments into account. | |
5470 | ||
5471 | ff. Fixed a bug that caused $((...);(...)) to be misinterpreted as an | |
5472 | arithmetic substitution. | |
5473 | ||
5474 | gg. Fixed a bug in the prompt expansion code that inappropriately added a | |
5475 | \001 before a \002 under certain circumstances. | |
5476 | ||
5477 | hh. Fixed a bug that caused `unset LANG' to not properly reset the locale | |
5478 | (previous versions would set the locale back to what it was when bash | |
5479 | was started rather than the system's "native" locale). | |
5480 | ||
5481 | ii. Fixed a bug that could cause file descriptors > 10 to not be closed even | |
5482 | when closed explicitly by a script. | |
5483 | ||
5484 | jj. Fixed a bug that caused single quotes to be stripped from ANSI-C quoting | |
5485 | inside double-quoted command substitutions. | |
5486 | ||
5487 | kk. Fixed a bug that could cause core dumps when `return' was executed as the | |
5488 | last element of a pipeline inside a shell function. | |
5489 | ||
5490 | ll. Fixed a bug that caused DEBUG trap strings to overwrite commands stored in | |
5491 | the jobs list. | |
5492 | ||
5493 | 2. Changes to Readline | |
5494 | ||
5495 | a. Fixed a problem that caused segmentation faults when using readline in | |
5496 | callback mode and typing consecutive DEL characters on an empty line. | |
5497 | ||
5498 | b. Fixed several redisplay problems with multibyte characters, all having to | |
5499 | do with the different code paths and variable meanings between single-byte | |
5500 | and multibyte character redisplay. | |
5501 | ||
5502 | c. Fixed a problem with key sequence translation when presented with the | |
5503 | sequence \M-\C-x. | |
5504 | ||
5505 | d. Fixed a problem that prevented the `a' command in vi mode from being | |
5506 | undone and redone properly. | |
5507 | ||
5508 | e. Fixed a problem that prevented empty inserts in vi mode from being undone | |
5509 | properly. | |
5510 | ||
5511 | f. Fixed a problem that caused readline to initialize with an incorrect idea | |
5512 | of whether or not the terminal can autowrap. | |
5513 | ||
5514 | g. Fixed output of key bindings (like bash `bind -p') to honor the setting of | |
5515 | convert-meta and use \e where appropriate. | |
5516 | ||
5517 | h. Changed the default filename completion function to call the filename | |
5518 | dequoting function if the directory completion hook isn't set. This means | |
5519 | that any directory completion hooks need to dequote the directory name, | |
5520 | since application-specific hooks need to know how the word was quoted, | |
5521 | even if no other changes are made. | |
5522 | ||
5523 | i. Fixed a bug with creating the prompt for a non-interactive search string | |
5524 | when there are non-printing characters in the primary prompt. | |
5525 | ||
5526 | j. Fixed a bug that caused prompts with invisible characters to be redrawn | |
5527 | multiple times in a multibyte locale. | |
5528 | ||
5529 | k. Fixed a bug that could cause the key sequence scanning code to return the | |
5530 | wrong function. | |
5531 | ||
5532 | l. Fixed a problem with the callback interface that caused it to fail when | |
5533 | using multi-character keyboard macros. | |
5534 | ||
5535 | m. Fixed a bug that could cause a core dump when an edited history entry was | |
5536 | re-executed under certain conditions. | |
5537 | ||
5538 | n. Fixed a bug that caused readline to reference freed memory when attmpting | |
5539 | to display a portion of the prompt. | |
5540 | ||
5541 | 3. New Features in Bash | |
5542 | ||
5543 | a. Changed the parameter pattern replacement functions to not anchor the | |
5544 | pattern at the beginning of the string if doing global replacement - that | |
5545 | combination doesn't make any sense. | |
5546 | ||
5547 | b. When running in `word expansion only' mode (--wordexp option), inhibit | |
5548 | process substitution. | |
5549 | ||
5550 | c. Loadable builtins now work on MacOS X 10.[34]. | |
5551 | ||
5552 | d. Shells running in posix mode no longer set $HOME, as POSIX requires. | |
5553 | ||
5554 | e. The code that checks for binary files being executed as shell scripts now | |
5555 | checks only for NUL rather than any non-printing character. | |
5556 | ||
5557 | f. Quoting the string argument to the [[ command's =~ operator now forces | |
5558 | string matching, as with the other pattern-matching operators. | |
5559 | ||
5560 | 4. New Features in Readline | |
5561 | ||
5562 | a. Calling applications can now set the keyboard timeout to 0, allowing | |
5563 | poll-like behavior. | |
5564 | ||
5565 | b. The value of SYS_INPUTRC (configurable at compilation time) is now used as | |
5566 | the default last-ditch startup file. | |
5567 | ||
5568 | c. The history file reading functions now allow windows-like \r\n line | |
5569 | terminators. | |
5570 | ||
5571 | ------------------------------------------------------------------------------ | |
95732b49 JA |
5572 | This document details the changes between this version, bash-3.1-release, |
5573 | and the previous version, bash-3.1-rc2. | |
5574 | ||
5575 | 1. Changes to Readline | |
5576 | ||
5577 | a. Several changes to the multibyte redisplay code to fix problems with | |
5578 | prompts containing invisible characters. | |
5579 | ||
5580 | ------------------------------------------------------------------------------ | |
5581 | This document details the changes between this version, bash-3.1-rc2, | |
5582 | and the previous version, bash-3.1-rc1. | |
5583 | ||
5584 | 1. Changes to Bash | |
5585 | ||
5586 | a. Fixed a bug that caused a DEBUG trap to overwrite a command string that's | |
5587 | eventually attached to a background job. | |
5588 | ||
5589 | b. Changed some code so that filenames with leading tildes with spaces in the | |
5590 | name aren't tilde-expanded by the bash completion code. | |
5591 | ||
5592 | c. Fixed a bug that caused the pushd builtin to fail to change to | |
5593 | directories with leading `-'. | |
5594 | ||
5595 | d. Fixed a small memory leak in the programmable completion code. | |
5596 | ||
5597 | 2. Changes to Readline | |
5598 | ||
5599 | a. Fixed a redisplay bug caused by moving the cursor vertically to a line | |
5600 | with invisible characters in the prompt in a multibyte locale. | |
5601 | ||
5602 | b. Fixed a bug that could cause the terminal special chars to be bound in the | |
5603 | wrong keymap in vi mode. | |
5604 | ||
5605 | 3. New Features in Bash | |
5606 | ||
5607 | a. If compiled for strict POSIX conformance, LINES and COLUMNS may now | |
5608 | override the true terminal size. | |
5609 | ||
5610 | 4. New Features in Readline | |
5611 | ||
5612 | a. A new external application-controllable variable that allows the LINES | |
5613 | and COLUMNS environment variables to set the window size regardless of | |
5614 | what the kernel returns. | |
5615 | ||
5616 | ------------------------------------------------------------------------------ | |
5617 | This document details the changes between this version, bash-3.1-rc1, | |
5618 | and the previous version, bash-3.1-beta1. | |
5619 | ||
5620 | 1. Changes to Bash | |
5621 | ||
0628567a | 5622 | a. Fixed a bug that could cause core dumps due to accessing the current |
95732b49 JA |
5623 | pipeline while in the middle of modifying it. |
5624 | ||
5625 | b. Fixed a bug that caused pathnames with backslashes still quoting characters | |
5626 | to be passed to opendir(). | |
5627 | ||
5628 | c. Command word completion now obeys the setting of completion-ignore-case. | |
5629 | ||
5630 | d. Fixed a problem with redirection that caused file descriptors greater than | |
5631 | 2 to be inappropriately marked as close-on-exec. | |
5632 | ||
5633 | e. In Posix mode, after `wait' is called to wait for a particular process | |
5634 | explicitly, that process is removed from the list of processes known to | |
5635 | the shell, and subsequent attempts to wait for it return errors. | |
5636 | ||
5637 | f. Fixed a bug that caused extended pattern matching to incorrectly scan | |
5638 | backslash-escaped pattern characters. | |
5639 | ||
5640 | g. Fixed a synchronization problem that could cause core dumps when handling | |
5641 | a SIGWINCH. | |
5642 | ||
5643 | h. Fixed a bug that caused an unmatched backquote to be accepted without an | |
5644 | error when processing here documents. | |
5645 | ||
5646 | i. Fixed a small memory leak in the `cd' builtin. | |
5647 | ||
5648 | j. Fix for MacOS X so it gets the values for the HOSTTYPE, MACHTYPE, and | |
5649 | OSTYPE variables at build time, to support universal binaries. | |
5650 | ||
5651 | k. Fixed a bug that could cause an exit trap to return the exit status of | |
5652 | the trap command rather than the status as it was before the trap was | |
5653 | run as the shell's exit status. | |
5654 | ||
5655 | 2. New Features in Bash | |
5656 | ||
5657 | 3. Changes to Readline | |
5658 | ||
5659 | a. Fixed a bug that caused reversing the incremental search direction to | |
5660 | not work correctly. | |
5661 | ||
5662 | b. Fixed the vi-mode `U' command to only undo up to the first time insert mode | |
5663 | was entered, as Posix specifies. | |
5664 | ||
5665 | c. Fixed a bug in the vi-mode `r' command that left the cursor in the wrong | |
5666 | place. | |
5667 | ||
5668 | 4. New Features in Readline | |
5669 | ||
5670 | a. New application-callable auxiliary function, rl_variable_value, returns | |
5671 | a string corresponding to a readline variable's value. | |
5672 | ||
5673 | b. When parsing inputrc files and variable binding commands, the parser | |
5674 | strips trailing whitespace from values assigned to boolean variables | |
5675 | before checking them. | |
5676 | ||
5677 | ||
5678 | ------------------------------------------------------------------------------ | |
5679 | This document details the changes between this version, bash-3.1-beta1, | |
5680 | and the previous version, bash-3.1-alpha1. | |
5681 | ||
5682 | 1. Changes to Bash | |
5683 | ||
5684 | a. Added some system-specific signal names. | |
5685 | ||
5686 | b. Fixed a typo in the ulimit builtin to make `x' the right option to | |
8868edaf | 5687 | manipulate the limit on file locks. |
95732b49 JA |
5688 | |
5689 | c. Fixed a problem with using += to append to index 0 of an array variable | |
5690 | when not using subscript syntax. | |
5691 | ||
5692 | d. A few changes to configure.in to remove calls to obsolete or outdated | |
5693 | macros. | |
5694 | ||
5695 | e. Make sure changes to variables bash handles specially (e.g., LC_ALL) are | |
5696 | made when the variable is set in the temporary environment to a command. | |
5697 | ||
5698 | f. Make sure changes to variables bash handles specially (e.g., LC_ALL) are | |
5699 | made when the variable is modified using `printf -v'. | |
5700 | ||
5701 | g. The export environment is now remade on cygwin when HOME is changed, so | |
5702 | DLLs bash is linked against pick up the new value. This fixes problems | |
5703 | with tilde expansion when linking against and already-installed readline. | |
5704 | ||
5705 | h. Small fix to the logic for performing tilde expansion in posix mode, so | |
5706 | expansion on the right-hand side of an assignment statement takes place. | |
5707 | ||
5708 | i. Fixed a bug that prevented redirections associated with a shell function | |
5709 | from being executed when in a subshell. | |
5710 | ||
5711 | j. Fixed `source' and `.' builtins to not require an executable file when | |
5712 | searching $PATH for a file to source. | |
5713 | ||
5714 | k. Fixed a bug that caused incorrect word splitting in a function when IFS | |
5715 | was declared local, then unset. | |
5716 | ||
5717 | l. Fixed a problem with the `kill' builtin that prevented sending signals | |
5718 | to a process group under certain circumstances when providing a pid < 0. | |
5719 | ||
5720 | m. When in POSIX mode, `pwd' now checks that the value it prints is the same | |
5721 | directory as `.', even when displaying $PWD. | |
5722 | ||
5723 | n. Fixed a problem with the `read' builtin when reading a script from standard | |
5724 | input and reading data from the same file. | |
5725 | ||
5726 | o. Fixed a problem with the `type' and `command' builtins that caused absolute | |
5727 | pathnames to be displayed incorrectly. | |
5728 | ||
5729 | p. Some changes to the `bg' builtin for POSIX conformance. | |
5730 | ||
5731 | q. The `fc' builtin now removes the `fc' command that caused it to invoke an | |
5732 | editor on specified history entries from the history entirely, rather than | |
5733 | simply ignoring it. | |
5734 | ||
5735 | r. When in POSIX mode, the `v' command in vi editing mode simply invokes vi | |
5736 | on the current command, rather than checking $FCEDIT and $EDITOR. | |
5737 | ||
5738 | s. Fixed a small memory leak in the pathname canonicalization code. | |
5739 | ||
5740 | t. Fixed a bug that caused the expanded value of a $'...' string to be | |
5741 | incorrectly re-quoted if it occurred within a double-quoted ${...} | |
5742 | parameter expansion. | |
5743 | ||
5744 | u. Restored default emacs-mode key binding of M-TAB to dynamic-complete-history. | |
5745 | ||
5746 | v. Fixed a bug that caused core dumps when interrupting loops running builtins | |
5747 | on some systems. | |
5748 | ||
5749 | w. Make sure that some of the functions bash provides replacements for are | |
5750 | not cpp defines. | |
5751 | ||
5752 | x. The code that scans embedded commands for the parser (`...` and $(...)) is | |
5753 | now more aware of embedded comments and their effect on quoted strings. | |
5754 | ||
5755 | y. Changed the `-n' option to the `history' builtin to not reset the number of | |
5756 | history lines read in the current session after reading the new lines from | |
5757 | the history file if the history is being appended when it is written to | |
5758 | the file, since the appending takes care of the problem that the adjustment | |
5759 | was intended to solve. | |
5760 | ||
5761 | z. Improved the error message displayed when a shell script fails to execute | |
5762 | because the environment and size of command line arguments are too large. | |
5763 | ||
5764 | aa. A small fix to make sure that $HISTCMD is evaluated whenever the shell is | |
5765 | saving commands to the history list, not just when HISTSIZE is defined. | |
5766 | ||
5767 | 2. Changes to Readline | |
5768 | ||
5769 | a. The `change-case' command now correctly changes the case of multibyte | |
5770 | characters. | |
5771 | ||
5772 | b. Changes to the shared library construction scripts to deal with Windows | |
5773 | DLL naming conventions for Cygwin. | |
5774 | ||
5775 | c. Fixed the redisplay code to avoid core dumps resulting from a poorly-timed | |
5776 | SIGWINCH. | |
5777 | ||
5778 | d. Fixed the non-incremental search code in vi mode to dispose of any current | |
5779 | undo list when copying a line from the history into the current editing | |
5780 | buffer. | |
5781 | ||
5782 | e. The variable assignment code now ignores whitespace at the end of lines | |
5783 | when assigning to boolean variables. | |
5784 | ||
5785 | f. The `C-w' binding in incremental search now understands multibyte | |
5786 | characters. | |
5787 | ||
5788 | 3. New Features in Bash | |
5789 | ||
5790 | a. A new configuration option, `--enable-strict-posix-default', which will | |
5791 | build bash to be POSIX conforming by default. | |
5792 | ||
5793 | 4. New Features in Readline | |
5794 | ||
5795 | a. If the rl_completion_query_items is set to a value < 0, readline never | |
5796 | asks the user whether or not to view the possible completions. | |
5797 | ||
5798 | ------------------------------------------------------------------------------ | |
5799 | This document details the changes between this version, bash-3.1-alpha1, | |
5800 | and the previous version, bash-3.0-release. | |
5801 | ||
5802 | 1. Changes to Bash | |
5803 | ||
5804 | a. Fixed a bug that caused bash to crash if referencing an unset local array. | |
5805 | ||
5806 | b. Fixed a problem that caused tilde expansion to not be performed before | |
5807 | attempting globbing word completion. | |
5808 | ||
5809 | c. Fixed an incompatibility so that a first argument to trap that's a valid | |
5810 | signal number will be trated as a signal rather than a command to execute. | |
5811 | ||
5812 | d. Fixed ${#word} expansion to correctly compute the length of a string | |
5813 | containing multibyte characters. | |
5814 | ||
5815 | e. Fixed a bug that caused bash to not pass the correct flags for signal | |
5816 | disposition to child processes. | |
5817 | ||
5818 | f. Fixed a bug that caused `fc -l' to list one too many history entries. | |
5819 | ||
5820 | g. Some fixes to `fc' for POSIX conformance. | |
5821 | ||
5822 | h. Some fixes to job status display for POSIX conformance. | |
5823 | ||
5824 | i. Fixed a bug that caused `command -v' to display output if a command was not | |
5825 | found -- it should be silent. | |
5826 | ||
5827 | j. In POSIX mode, `type' and `command -[vV]' do not report non-executable | |
5828 | files, even if the shell will attempt to execute them. | |
5829 | ||
5830 | k. Fixed a bug that caused the `==' operator to the [[ command to not attempt | |
5831 | extended pattern matching. | |
5832 | ||
5833 | l. Fixed the brace expansion code to handle characters whose value exceeds 128. | |
5834 | ||
5835 | m. Fixed `printf' to handle strings with a leading `\0' whose length is | |
5836 | non-zero. | |
5837 | ||
5838 | n. Fixed a couple of problems with brace expansion where `${' was handled | |
5839 | incorrectly. | |
5840 | ||
5841 | o. Fixed off-by-one error when calculating the upper bound of `offset' when | |
5842 | processing the ${array[@]:offset:length} expansion. | |
5843 | ||
5844 | p. System-specific configuration changes for: FreeBSD 5.x, Interix, MacOS X | |
5845 | 10.4, Linux 2.4+ kernels, Linux 3.x kernels, Dragonfly BSD, QNX 6.x, | |
5846 | Cygwin | |
5847 | ||
5848 | q. Fixed a bug that caused the shell to ignore the status of the rightmost | |
5849 | command in a pipeline when the `pipefail' option was enabled. | |
5850 | ||
5851 | r. Fixed a completion bug that caused core dumps when expanding a directory | |
5852 | name. | |
5853 | ||
5854 | s. Fixed a bug that prevented `hash -d' from removing commands from the hash | |
5855 | table. | |
5856 | ||
5857 | t. Fixed word splitting to avoid really bad quadratic performance when | |
5858 | expanding long lists. | |
5859 | ||
5860 | u. Fixed a bug that caused negative offsets in substring expansion to use the | |
5861 | wrong values. | |
5862 | ||
5863 | v. Fixed a bug in printf that caused it to not return failure on write errors. | |
5864 | ||
5865 | w. Fixed a bug that caused commands in subshells to not be properly timed. | |
5866 | ||
5867 | x. The shell parser no longer attempts to parse a compound assignment specially | |
5868 | unless in a position where an assignment statement is acceptable or parsing | |
5869 | arguments to a builtin that accepts assignment statements. | |
5870 | ||
5871 | y. Fixed a problem that caused a `case' statement to be added to the history | |
5872 | incorrectly as a single command if the `case word' was on one line and the | |
5873 | `in' on another. | |
5874 | ||
5875 | z. Fixed a problem that caused internal shell quoting characters to be | |
5876 | incorrectly quoted with backslashes under some circumstances. | |
5877 | ||
5878 | aa. The shell now performs correct word splitting when IFS contains multibyte | |
5879 | characters. | |
5880 | ||
5881 | bb. The mail checking code now resets the cached file information if the size | |
5882 | drops to 0, even if the times don't change. | |
5883 | ||
5884 | cc. A completed command name that is found in $PATH as well as the name of a | |
5885 | directory in the current directory no longer has a slash appended in certain | |
5886 | circumstances: a single instance found in $PATH when `.' is not in $PATH, | |
5887 | and multiple instances found in $PATH, even when `.' is in $PATH. | |
5888 | ||
5889 | dd. Incorporated tilde expansion into the word expansion code rather than as a | |
5890 | separately-called function, fixing some cases where it was performed | |
5891 | inappropriately (e.g., after the second `=' in an assignment statement or | |
5892 | in a double-quoted parameter expansion). | |
5893 | ||
5894 | ee. Fixed several bugs encountered when parsing compound assignment statements, | |
5895 | so that compound assignments appearing as arguments to builtins are no | |
5896 | longer double-expanded. | |
5897 | ||
5898 | ff. Fixed a bug in the command execution code that caused asynchronous commands | |
5899 | containing command substitutions to not put the terminal in the wrong | |
5900 | process group. | |
5901 | ||
5902 | gg. Bash now handles the case where the WCONTINUED flag causes waitpid() to | |
5903 | return -1/EINVAL at runtime as well as configuration time. | |
5904 | ||
5905 | hh. Fixed parser to generate an error when the pipeline `argument' to `!' or | |
5906 | `time' is NULL. | |
5907 | ||
5908 | ii. The shell now takes a little more care when manipulating file descriptors | |
5909 | greater than 9 with the `exec' builtin. | |
5910 | ||
5911 | jj. Fixed a bug that caused variable assignments preceding the `command' builtin | |
5912 | preceding a special builtin to be preserved after the command completed in | |
5913 | POSIX mode. | |
5914 | ||
5915 | kk. Fixed a bug that allowed variables beginning with a digit to be created. | |
5916 | ||
5917 | ll. Fixed a bug that caused a \<newline> to be removed when parsing a $'...' | |
5918 | construct. | |
5919 | ||
5920 | mm. A shell whose name begins with `-' will now be a restricted shell if the | |
5921 | remainder of the name indicates it should be restricted. | |
5922 | ||
5923 | nn. Fixed a bug that could cause a core dump if FUNCNAME were changed or unset | |
5924 | during a function's execution. | |
5925 | ||
5926 | oo. Fixed a bug that caused executing a `return' in a function to not execute | |
5927 | a RETURN trap. The RETURN trap is inherited by shell functions only if | |
5928 | function tracing is globally enabled or has been enabled for that function. | |
5929 | ||
5930 | pp. Fixed cases where var[@] was not handled exactly like var, when var is a | |
5931 | scalar variable. | |
5932 | ||
5933 | qq. Fixed a bug that caused the first character after a SIGINT to be discarded | |
5934 | under certain circumstances. | |
5935 | ||
5936 | rr. Fixed exit status code so that a suspended job returns 128+signal as its | |
5937 | exit status (preventing commands after it in `&&' lists from being | |
5938 | executed). | |
5939 | ||
5940 | ss. Fixed a bug that caused the shell parser state to be changed by executing | |
5941 | a shell function as a result of word completion. | |
5942 | ||
5943 | tt. Fixed a long-standing bug that caused '\177' characters in variable | |
5944 | values to be discarded when expanded in double-quoted strings. | |
5945 | ||
5946 | uu. Fixed a bug that caused $RANDOM to be re-seeded multiple times in a | |
5947 | subshell environment. | |
5948 | ||
5949 | vv. Extensive changes to the job management code to avoid the pid-reuse and | |
5950 | pid-aliasing problems caused by retaining the exit status of too many jobs, | |
5951 | but still retain as many background job statuses as POSIX requires. | |
5952 | ||
5953 | ww. Fixed a parser bug in processing \<newline> that caused things like | |
5954 | ||
5955 | ((echo 5) \ | |
5956 | (echo 6)) | |
5957 | ||
5958 | to not work correctly. | |
5959 | ||
5960 | xx. `pwd -P' now sets $PWD to a directory name containing no symbolic links | |
5961 | when in posix mode, as POSIX requires. | |
5962 | ||
5963 | yy. In posix mode, bash no longer sets $PWD to a name containing no symbolic | |
5964 | links if a directory is chosen from $CDPATH. | |
5965 | ||
5966 | zz. The word splitting code now treats an IFS character that is not space, | |
5967 | tab, or newline and any adjacent IFS white space as a single delimiter, as | |
5968 | SUSv3/XPG6 require. | |
5969 | ||
5970 | aaa. The `read' builtin now checks whether or not the number of fields read is | |
5971 | exactly the same as the number of variables instead of just assigning the | |
5972 | rest of the line (minus any trailing IFS white space) to the last | |
5973 | variable. This is what POSIX/SUS/XPG all require. | |
5974 | ||
5975 | bbb. Fixed a bug that caused `read' to always check whether or not fd 0 was a | |
5976 | pipe, even when reading from another file descriptor. | |
5977 | ||
5978 | ccc. Fixed a bug that caused short-circuiting of execution even if the return | |
5979 | value was being inverted. | |
5980 | ||
5981 | ddd. Fixed a bug that caused a core dump while decoding \W escapes in PS1 if | |
5982 | PWD was unset. | |
5983 | ||
5984 | eee. Fixed a bug in `read' that counted internal quoting characters for the | |
5985 | purposes of `read -n'. | |
5986 | ||
5987 | fff. Fixed a bug so that a function definition in a pipeline causes a child | |
5988 | process to be forked at the right time. | |
5989 | ||
5990 | ggg. Bash will not attempt to link against a readline library that doesn't | |
5991 | have rl_gnu_readline_p == 1. | |
5992 | ||
5993 | hhh. Fixed a bug that caused `read' to consume one too many characters when | |
5994 | reading a fixed number of characters and the Nth character is a backslash. | |
5995 | ||
5996 | iii. Fixed a bug that caused `unset' on variables in the temporary environment | |
5997 | to leave them set when `unset' completed. | |
5998 | ||
5999 | jjj. Fixed a bug that caused bash to close fd 2 if an `exec' failed and the | |
6000 | shell didn't exit. | |
6001 | ||
6002 | kkk. The completion code is more careful to not turn `/' or `///' into `//', | |
6003 | for those systems on which `//' has special meaning. | |
6004 | ||
6005 | lll. Fixed a bug that caused command substitution in asynchronous commands to | |
6006 | close the wrong file descriptors. | |
6007 | ||
6008 | mmm. The shell no longer prints status messages about terminated background | |
6009 | processes unless job control is active. | |
6010 | ||
6011 | nnn. Fixed a bug that prevented multiple consecutive invocations of `history -s' | |
6012 | from adding all the commands to the history list. | |
6013 | ||
6014 | ooo. Added a couple of changes to make arithmetic expansion more consistent in | |
6015 | all its contexts (still not perfect). | |
6016 | ||
6017 | ppp. Fixed a bug that caused the parser to occasionally not find the right | |
6018 | terminating "`" in an old-style command substitution. | |
6019 | ||
6020 | qqq. Fixed a bug that caused core dumps when the shell was reading its non- | |
6021 | interactive input from fd 0 and fd 0 was duplicated and restored using a | |
6022 | combination of `exec' (to save) and redirection (to restore). | |
6023 | ||
6024 | rrr. Fixed a problem that caused loops in sourced scripts to not be cleaned | |
6025 | up properly when a `return' is executed. | |
6026 | ||
6027 | sss. Change internal command substitution completion function to append a slash | |
6028 | to directory names in the command. | |
6029 | ||
6030 | 2. Changes to Readline | |
6031 | ||
6032 | a. Fixed a bug that caused multiliine prompts to be wrapped and displayed | |
6033 | incorrectly. | |
6034 | ||
6035 | b. Fixed a bug that caused ^P/^N in emacs mode to fail to display the current | |
6036 | line correctly. | |
6037 | ||
6038 | c. Fixed a problem in computing the number of invisible characters on the first | |
6039 | line of a prompt whose length exceeds the screen width. | |
6040 | ||
6041 | d. Fixed vi-mode searching so that failure preserves the current line rather | |
6042 | than the last line in the history list. | |
6043 | ||
6044 | e. Fixed the vi-mode `~' command (change-case) to have the correct behavior at | |
6045 | end-of-line when manipulating multibyte characters. | |
6046 | ||
6047 | f. Fixed the vi-mode `r' command (change-char) to have the correct behavior at | |
6048 | end-of-line when manipulating multibyte characters. | |
6049 | ||
6050 | g. Fixed multiple bugs in the redisplay of multibyte characters: displaying | |
6051 | prompts longer than the screen width containing multibyte characters, | |
6052 | ||
6053 | h. Fix the calculation of the number of physical characters in the prompt | |
6054 | string when it contains multibyte characters. | |
6055 | ||
6056 | i. A non-zero value for the `rl_complete_suppress_append' variable now causes | |
6057 | no `/' to be appended to a directory name. | |
6058 | ||
6059 | j. Fixed forward-word and backward-word to work when words contained | |
6060 | multibyte characters. | |
6061 | ||
6062 | k. Fixed a bug in finding the delimiter of a `?' substring when performing | |
6063 | history expansion in a locale that supports multibyte characters. | |
6064 | ||
6065 | l. Fixed a memory leak caused by not freeing the timestamp in a history entry. | |
6066 | ||
6067 | m. Fixed a bug that caused "\M-x" style key bindings to not obey the setting | |
6068 | of the `convert-meta' variable. | |
6069 | ||
6070 | n. Fixed saving and restoring primary prompt when prompting for incremental | |
6071 | and non-incremental searches; search prompts now display multibyte | |
6072 | characters correctly. | |
6073 | ||
6074 | o. Fixed a bug that caused keys originally bound to self-insert but shadowed | |
6075 | by a multi-character key sequence to not be inserted. | |
6076 | ||
6077 | p. Fixed code so rl_prep_term_function and rl_deprep_term_function aren't | |
6078 | dereferenced if NULL (matching the documentation). | |
6079 | ||
6080 | q. Extensive changes to readline to add enough state so that commands | |
6081 | requiring additional characters (searches, multi-key sequences, numeric | |
6082 | arguments, commands requiring an additional specifier character like | |
6083 | vi-mode change-char, etc.) work without synchronously waiting for | |
6084 | additional input. | |
6085 | ||
6086 | r. Lots of changes so readline builds and runs on MinGW. | |
6087 | ||
6088 | s. Readline no longer tries to modify the terminal settings when running in | |
6089 | callback mode. | |
6090 | ||
6091 | t. The Readline display code no longer sets the location of the last invisible | |
6092 | character in the prompt if the \[\] sequence is empty. | |
6093 | ||
6094 | 3. New Features in Bash | |
6095 | ||
6096 | a. Bash now understands LC_TIME as a special variable so that time display | |
6097 | tracks the current locale. | |
6098 | ||
6099 | b. BASH_ARGC, BASH_ARGV, BASH_SOURCE, and BASH_LINENO are no longer created | |
6100 | as `invisible' variables and may not be unset. | |
6101 | ||
6102 | c. In POSIX mode, if `xpg_echo' option is enabled, the `echo' builtin doesn't | |
6103 | try to interpret any options at all, as POSIX requires. | |
6104 | ||
6105 | d. The `bg' builtin now accepts multiple arguments, as POSIX seems to specify. | |
6106 | ||
6107 | e. Fixed vi-mode word completion and glob expansion to perform tilde | |
6108 | expansion. | |
6109 | ||
6110 | f. The `**' mathematic exponentiation operator is now right-associative. | |
6111 | ||
6112 | g. The `ulimit' builtin has new options: -i (max number of pending signals), | |
6113 | -q (max size of POSIX message queues), and -x (max number of file locks). | |
6114 | ||
6115 | h. A bare `%' once again expands to the current job when used as a job | |
6116 | specifier. | |
6117 | ||
6118 | i. The `+=' assignment operator (append to the value of a string or array) is | |
6119 | now supported for assignment statements and arguments to builtin commands | |
6120 | that accept assignment statements. | |
6121 | ||
6122 | j. BASH_COMMAND now preserves its value when a DEBUG trap is executed. | |
6123 | ||
6124 | k. The `gnu_errfmt' option is enabled automatically if the shell is running | |
6125 | in an emacs terminal window. | |
6126 | ||
6127 | l. New configuration option: --single-help-strings. Causes long help text | |
6128 | to be written as a single string; intended to ease translation. | |
6129 | ||
6130 | m. The COMP_WORDBREAKS variable now causes the list of word break characters | |
6131 | to be emptied when the variable is unset. | |
6132 | ||
6133 | n. An unquoted expansion of $* when $IFS is empty now causes the positional | |
6134 | parameters to be concatenated if the expansion doesn't undergo word | |
6135 | splitting. | |
6136 | ||
6137 | o. Bash now inherits $_ from the environment if it appears there at startup. | |
6138 | ||
6139 | p. New shell option: nocasematch. If non-zero, shell pattern matching ignores | |
6140 | case when used by `case' and `[[' commands. | |
6141 | ||
6142 | q. The `printf' builtin takes a new option: -v var. That causes the output | |
6143 | to be placed into var instead of on stdout. | |
6144 | ||
6145 | r. By default, the shell no longer reports processes dying from SIGPIPE. | |
6146 | ||
6147 | s. Bash now sets the extern variable `environ' to the export environment it | |
6148 | creates, so C library functions that call getenv() (and can't use the | |
6149 | shell-provided replacement) get current values of environment variables. | |
6150 | ||
6151 | 4. New Features in Readline | |
6152 | ||
6153 | a. The key sequence sent by the keypad `delete' key is now automatically | |
6154 | bound to delete-char. | |
6155 | ||
6156 | b. A negative argument to menu-complete now cycles backward through the | |
6157 | completion list. | |
6158 | ||
6159 | c. A new bindable readline variable: bind-tty-special-chars. If non-zero, | |
6160 | readline will bind the terminal special characters to their readline | |
6161 | equivalents when it's called (on by default). | |
6162 | ||
6163 | d. New bindable command: vi-rubout. Saves deleted text for possible | |
6164 | reinsertion, as with any vi-mode `text modification' command; `X' is bound | |
6165 | to this in vi command mode. | |
6166 | ||
6167 | ------------------------------------------------------------------------------ | |
b80f6443 JA |
6168 | This document details the changes between this version, bash-3.0-release, |
6169 | and the previous version, bash-3.0-rc1. | |
6170 | ||
6171 | 1. Changes to Bash | |
6172 | ||
6173 | a. Fixed a boundary overrun that could cause segmentation faults when the | |
6174 | completion code hands an incomplete construct to the word expansion | |
6175 | functions. | |
6176 | ||
6177 | b. Changed posix mode behavior so that an error in a variable assignment | |
6178 | preceding a special builtin causes a non-interactive shell to exit. | |
6179 | ||
6180 | c. Change the directory expansion portion of the completion code to not | |
6181 | expand embedded command substitutions if the directory name appears in | |
6182 | the file system. | |
6183 | ||
6184 | d. Fixed a problem that caused `bash -r' to turn on restrictions before | |
6185 | reading the startup files. | |
6186 | ||
6187 | e. Fixed a problem with the default operation of the `umask' builtin. | |
6188 | ||
6189 | 2. Changes to Readline | |
6190 | ||
6191 | a. Fixed a problem with readline saving the contents of the current line | |
6192 | before beginning a non-interactive search. | |
6193 | ||
6194 | b. Fixed a problem with EOF detection when using rl_event_hook. | |
6195 | ||
6196 | c. Fixed a problem with the vi mode `p' and `P' commands ignoring numeric | |
6197 | arguments. | |
6198 | ||
6199 | ------------------------------------------------------------------------------ | |
6200 | This document details the changes between this version, bash-3.0-rc1, | |
6201 | and the previous version, bash-3.0-beta1. | |
6202 | ||
6203 | 1. Changes to Bash | |
6204 | ||
6205 | a. Fixed a bug that caused incorrect behavior when referecing element 0 of | |
6206 | an array using $array, element 0 was unset, and `set -u' was enabled. | |
6207 | ||
6208 | b. System-specific changes for: SCO Unix 3.2, Tandem. | |
6209 | ||
6210 | c. Fixed a bug that caused inappropriate word splitting when a variable was | |
6211 | expanded within a double-quoted string that also included $@. | |
6212 | ||
6213 | d. Fixed a bug that caused `pwd' to not display anything in physical mode | |
6214 | when the file system had changed underneath the shell. | |
6215 | ||
6216 | e. Fixed a bug in the pre- and post- increment and decrement parsing in the | |
6217 | expression evaluator that caused errors when the operands and corresponding | |
6218 | operators were separated by whitespace. | |
6219 | ||
6220 | f. Fixed a bug that caused `history -p' to add an entry to the history list, | |
6221 | counter to the documentation. (Keeps the history expansions invoked by | |
6222 | emacs-mode command line editing from doing that as well.) | |
6223 | ||
6224 | g. Fixed a bug that could cause a core dump if `cd' is asked to print out a | |
6225 | pathname longer than PATH_MAX characters. | |
6226 | ||
6227 | h. Fixed a bug that caused jobs to be put into the wrong process group under | |
6228 | some circumstances after enabling job control with `set -m'. | |
6229 | ||
6230 | i. `unalias' now returns failure if no alias name arguments are supplied. | |
6231 | ||
6232 | j. Documented the characters not allowed to appear in an alias name. | |
6233 | ||
6234 | k. $* is no longer expanded as if in double quotes when it appears in the | |
6235 | body of a here document, as the SUS seems to require. | |
6236 | ||
6237 | l. The `bashbug' script now uses a directory in $TMPDIR for exclusive | |
6238 | access rather than trying to guess how the underlying OS provides for | |
6239 | secure temporary file creation. | |
6240 | ||
6241 | m. Fixed a few problems with `cd' and `pwd' when asked to operate on pathnames | |
6242 | longer than PATH_MAX characters. | |
6243 | ||
6244 | n. Fixed a memory leak caused when creating multiple local array variables | |
6245 | with identical names. | |
6246 | ||
6247 | o. Fixed a problem with calls to getcwd() so that bash now operates better | |
6248 | when the full pathname to the current directory is longer than PATH_MAX | |
6249 | bytes. | |
6250 | ||
6251 | p. The `trap' builtin now reports an error if a single non-signal argument | |
6252 | is specified. | |
6253 | ||
6254 | q. Fixed a bug that caused `umask' to not work correctly when presented | |
6255 | with a mask of all 0s. | |
6256 | ||
6257 | r. When `getopts' reaches the end of options, OPTARG is unset, as POSIX | |
6258 | appears to specify. | |
6259 | ||
6260 | s. Interactive mode now depends on whether or not stdin and stderr are | |
6261 | connected to a tty; formerly it was stdin and stdout. POSIX requires | |
6262 | this. | |
6263 | ||
6264 | t. Fixed vi-mode completion to work more as POSIX specifies (e.g., doing the | |
6265 | right kind of filename generation). | |
6266 | ||
6267 | 2. Changes to Readline | |
6268 | ||
6269 | a. Fixed a problem that could cause readline to refer to freed memory when | |
6270 | moving between history lines while doing searches. | |
6271 | ||
6272 | b. Improvements to the code that expands and displays prompt strings | |
6273 | containing multibyte characters. | |
6274 | ||
6275 | c. Fixed a problem with vi-mode not correctly remembering the numeric argument | |
6276 | to the last `c'hange command for later use with `.'. | |
6277 | ||
6278 | d. Fixed a bug in vi-mode that caused multi-digit count arguments to work | |
6279 | incorrectly. | |
6280 | ||
6281 | e. Fixed a problem in vi-mode that caused the last text modification command | |
6282 | to not be remembered across different command lines. | |
6283 | ||
6284 | f. Fixed problems with changing characters and changing case at the end of | |
6285 | the line. | |
6286 | ||
6287 | 3. New Features in Bash | |
6288 | ||
6289 | a. The `jobs', `kill', and `wait' builtins now accept job control notation | |
6290 | even if job control is not enabled. | |
6291 | ||
6292 | b. The historical behavior of `trap' that allows a missing `action' argument | |
6293 | to cause each specified signal's handling to be reset to its default is | |
6294 | now only supported when `trap' is given a single non-option argument. | |
6295 | ||
6296 | 4. New Features in Readline | |
6297 | ||
6298 | a. When listing completions, directories have a `/' appended if the | |
6299 | `mark-directories' option has been enabled. | |
6300 | ||
6301 | ------------------------------------------------------------------------------ | |
6302 | This document details the changes between this version, bash-3.0-beta1, | |
6303 | and the previous version, bash-3.0-alpha. | |
6304 | ||
6305 | 1. Changes to Bash | |
6306 | ||
6307 | a. Fixes to build correctly when arrays are not compiled into the shell. | |
6308 | ||
6309 | b. Fixed command substitution to run any exit trap defined in the command | |
6310 | substitution before returning; the exit trap is not inherited from the | |
6311 | calling shell. | |
6312 | ||
6313 | c. Fixes to process group synchronization code so that every child process | |
6314 | attempts to set the terminal's process group; fixes some synchronization | |
6315 | problems on Linux kernels that schedule the child to always run before | |
6316 | the parent. | |
6317 | ||
6318 | d. Fixed processing of octal and hex constants in printf builtin for POSIX.2 | |
6319 | compliance. | |
6320 | ||
6321 | e. Fixed a couple of core dumps in the pattern removal code. | |
6322 | ||
6323 | f. Fixes to the array subrange extraction code to deal better with sparse | |
6324 | arrays. | |
6325 | ||
6326 | g. Parser errors and other errors that result in the shell exiting now cause | |
6327 | the exit trap to be run. | |
6328 | ||
6329 | h. Change the command substitution completion functions to not append any | |
6330 | closing quote, because it would be inserted a closing "`" or ")". | |
6331 | ||
6332 | i. Fix history initialization so assignments to $histchars made in startup | |
6333 | files are honored. | |
6334 | ||
6335 | j. If an exit trap does not contain a call to `exit', the shell now uses | |
6336 | the exit status of the last command executed before the trap as the exit | |
6337 | status of the shell. | |
6338 | ||
6339 | k. The parser now prompts with $PS2 if it reads a newline while parsing a | |
6340 | compound array assignment statement. | |
6341 | ||
6342 | l. When performing a compound array assignment, the parser doesn't treat | |
6343 | words of the form [index]=value as assignments if they're the result of | |
6344 | expansions. | |
6345 | ||
6346 | m. Fixed a bug that caused `return' executed in a trap command to make the | |
6347 | shell think it was still running the trap. | |
6348 | ||
6349 | n. Fixed the value of errno set by the pathname canonicalization functions. | |
6350 | ||
6351 | o. Changed the grammar so that `time' alone on a line times a null command | |
6352 | rather than being a syntax error. | |
6353 | ||
95732b49 | 6354 | p. The pattern substitution code no longer performs quote removal on the |
b80f6443 JA |
6355 | pattern before trying to match it, as the pattern removal functions do. |
6356 | ||
6357 | q. Fixed a bug that could cause core dumps when checking whether a quoted | |
6358 | command name was being completed. | |
6359 | ||
6360 | r. Fixes to the pattern removal and pattern replacement expansions to deal | |
6361 | with multibyte characters better (and faster). | |
6362 | ||
6363 | s. Fix to the substring expansion (${param:off[:len]}) to deal with (possibly | |
6364 | multibyte) characters instead of raw bytes. | |
6365 | ||
6366 | t. Fixed a bug that caused some key bindings set in an inputrc to be ignored | |
6367 | at shell startup. | |
6368 | ||
6369 | u. Fixed a bug that caused unsetting a local variable within a function to | |
6370 | not work correctly. | |
6371 | ||
6372 | v. Fixed a bug that caused invalid variables to be created when using | |
6373 | `read -a'. | |
6374 | ||
6375 | w. Fixed a bug that caused "$@" to expand incorrectly when used as the right | |
6376 | hand side of a parameter expansion such as ${word:="$@"} if the first | |
6377 | character of $IFS was not a space. | |
6378 | ||
6379 | x. Fixed a slight cosmetic problem when printing commands containing a | |
6380 | `>&word' redirection. | |
6381 | ||
6382 | y. Fixed a problem that could cause here documents to not be created correctly | |
6383 | if the system temporary directory did not allow writing. | |
6384 | ||
6385 | 2. Changes to Readline | |
6386 | ||
6387 | a. Change to history expansion functions to treat `^' as equivalent to word | |
8868edaf | 6388 | one, as the documentation states. |
b80f6443 JA |
6389 | |
6390 | b. Some changes to the display code to improve display and redisplay of | |
6391 | multibyte characters. | |
6392 | ||
6393 | c. Changes to speed up the multibyte character redisplay code. | |
6394 | ||
6395 | d. Fixed a bug in the vi-mode `E' command that caused it to skip over the | |
6396 | last character of a word if invoked while point was on the word's | |
6397 | next-to-last character. | |
6398 | ||
6399 | e. Fixed a bug that could cause incorrect filename quoting when | |
6400 | case-insensitive completion was enabled and the word being completed | |
6401 | contained backslashes quoting word break characters. | |
6402 | ||
6403 | f. Fixed a bug in redisplay triggered when the prompt string contains | |
6404 | invisible characters. | |
6405 | ||
6406 | g. Fixed some display (and other) bugs encountered in multibyte locales | |
6407 | when a non-ascii character was the last character on a line. | |
6408 | ||
6409 | h. Fixed some display bugs caused by multibyte characters in prompt strings. | |
6410 | ||
6411 | i. Fixed a problem with history expansion caused by non-whitespace characters | |
6412 | used as history word delimiters. | |
6413 | ||
6414 | 3. New Features in Bash | |
6415 | ||
6416 | a. printf builtin understands two new escape sequences: \" and \?. | |
6417 | ||
6418 | b. `echo -e' understands two new escape sequences: \" and \?. | |
6419 | ||
6420 | c. The GNU `gettext' package and libintl have been integrated; the shell's | |
6421 | messages can be translated into different languages. | |
6422 | ||
6423 | d. The `\W' prompt expansion now abbreviates $HOME as `~', like `\w'. | |
6424 | ||
6425 | e. The error message printed when bash cannot open a shell script supplied | |
6426 | as argument 1 now includes the name of the shell, to better identify | |
6427 | the error as coming from bash. | |
6428 | ||
6429 | 4. New Features in Readline | |
6430 | ||
6431 | a. New application variable, rl_completion_quote_character, set to any | |
6432 | quote character readline finds before it calls the application completion | |
6433 | function. | |
6434 | ||
6435 | b. New application variable, rl_completion_suppress_quote, settable by an | |
6436 | application completion function. If set to non-zero, readline does not | |
6437 | attempt to append a closing quote to a completed word. | |
6438 | ||
6439 | c. New application variable, rl_completion_found_quote, set to a non-zero | |
6440 | value if readline determines that the word to be completed is quoted. | |
6441 | Set before readline calls any application completion function. | |
6442 | ||
6443 | d. New function hook, rl_completion_word_break_hook, called when readline | |
6444 | needs to break a line into words when completion is attempted. Allows | |
6445 | the word break characters to vary based on position in the line. | |
6446 | ||
6447 | e. New bindable command: unix-filename-rubout. Does the same thing as | |
6448 | unix-word-rubout, but adds `/' to the set of word delimiters. | |
6449 | ||
6450 | ------------------------------------------------------------------------------ | |
6451 | This document details the changes between this version, bash-3.0-alpha, | |
6452 | and the previous version, bash-2.05b-release. | |
6453 | ||
6454 | 1. Changes to Bash | |
6455 | ||
6456 | a. Fixes so that the shell will compile without some of the default options | |
6457 | defined. | |
6458 | ||
6459 | b. Fixed an error message that did not pass enough arguments to printf. | |
6460 | ||
6461 | c. Fixed a bug that caused input redirection to a builtin inside a script | |
6462 | being read from standard input to result in the rest of the already- | |
6463 | read and buffered script to be discarded. | |
6464 | ||
6465 | d. Fixed a bug that caused subshell initialization to close the file | |
6466 | descriptor from which the shell was reading a script under certain | |
6467 | circumstances. | |
6468 | ||
6469 | e. Fixed a bug that caused the shell to not advance a string pointer over | |
6470 | a null wide character when doing string operations. | |
6471 | ||
6472 | f. Fixed the internal logout code so that shells that time out waiting for | |
6473 | input (using $TMOUT) run ~/.bash_logout. | |
6474 | ||
6475 | g. Portability and configuration changes for: cygwin, HP/UX, GNU/FreeBSD. | |
6476 | ||
6477 | h. The parser no longer adds implicit double quotes to ((...)) arithmetic | |
6478 | commands. | |
6479 | ||
6480 | i. The ((...)) arithmetic command evaluation code was fixed to not dump core | |
6481 | when the expanded string is null. | |
6482 | ||
6483 | j. The ((...)) arithmetic command evaluation code was fixed to not perform | |
6484 | variable assignments while expanding the expression. | |
6485 | ||
6486 | k. Fixed a bug that caused word splitting to be performed incorrectly when | |
6487 | IFS is set, but null. | |
6488 | ||
6489 | l. Fixed a bug in brace expansion that caused a quoted `$' preceding an | |
6490 | open brace to inhibit brace expansion. | |
6491 | ||
6492 | m. Fixed a bug that caused a leading `-' in the shell's name to cause it to | |
6493 | not be recognized as a restricted shell. | |
6494 | ||
6495 | n. Fixed a bug in the arithmetic evaluation code that could cause longjmps | |
6496 | to an invalid location and result in a core dump. | |
6497 | ||
6498 | o. Fixed a bug in the calculation of how many history lines are new in a | |
6499 | single shell session when reading new history lines from a file with | |
6500 | `history -n'. | |
6501 | ||
6502 | p. Fixed a bug in pathname canonicalization that caused the shell to dump | |
6503 | core when presented with a pathname longer than PATH_MAX. | |
6504 | ||
6505 | q. Fixed the parser so that it doesn't try to compare a char variable to | |
6506 | EOF, which fails when chars are unsigned. | |
6507 | ||
6508 | r. Fixed a bug in the simple command execution code that caused occasional | |
6509 | core dumps. | |
6510 | ||
6511 | s. The shell does a better job of saving any partial parsing state during | |
6512 | operations which cause a command to be executed while a line is being | |
6513 | entered and parsed. | |
6514 | ||
6515 | t. The completion code now splits words more like the expansion code when | |
6516 | $IFS is used to split. | |
6517 | ||
6518 | u. The locale code does a better job of recomputing the various locale | |
6519 | variable values when LC_ALL is unset. | |
6520 | ||
6521 | v. The programmable completion code does a better job of dequoting expanded | |
6522 | word lists before comparing them against the word to be matched. | |
6523 | ||
6524 | w. The shell no longer seg faults if the expanded value of $PS4 is null | |
6525 | and `set -x' is enabled. | |
6526 | ||
6527 | x. Fixed a bug that caused core dumps when a here string expanded to NULL. | |
6528 | ||
6529 | y. The mail checking code now makes sure the mailbox is bigger before | |
6530 | reporting the existence of new mail. | |
6531 | ||
6532 | z. The parser does not try to expand $'...' and $"..." when the appear | |
6533 | within double quotes unless the `extquote' option has been enabled with | |
6534 | `shopt'. For backwards compatibility, it is enabled by default. | |
6535 | ||
6536 | aa. Fixed a bug that caused `for x; do ...' and `select x; do ... to use | |
6537 | $@ instead of "$@" for the implicit list of arguments. | |
6538 | ||
6539 | bb. Fixed a bug that caused a subshell of a restricted shell (e.g., one | |
6540 | spawned to execute a pipeline) to not exit immediately if attempting | |
6541 | to use a command containing a slash. | |
6542 | ||
6543 | cc. Fixed a problem with empty replacements for a pattern that doesn't match | |
6544 | when performing ${param/word/} expansion. | |
6545 | ||
6546 | dd. Word expansions performed while expanding redirections no longer search | |
6547 | a command's temporary environment to expand variable values. | |
6548 | ||
6549 | ee. Improvements to the alias expansion code when expanding subsequent words | |
6550 | because an aliase's value ends with a space. | |
6551 | ||
6552 | ff. `cd -' now prints the current working directory after a successful chdir | |
6553 | even when the shell is not interactive, as the standard requires. | |
6554 | ||
6555 | gg. The shell does a better job of ensuring a child process dies of SIGINT | |
6556 | before resending SIGINT to itself. | |
6557 | ||
6558 | hh. The arithmetic expansion variable assignment code now does the right | |
6559 | thing when assigning to `special' variables like OPTIND. | |
6560 | ||
6561 | ii. When history expansion verification is enabled, the bash readline helper | |
6562 | functions that do history expansion on the current line don't print | |
6563 | the results. | |
6564 | ||
6565 | jj. Fixed bugs with multiple consecutive alias expansion when one of the | |
6566 | expansions ends with a space. | |
6567 | ||
6568 | kk. Fixed a problem in the programmable completion code that could cause core | |
6569 | dumps when trying to initialize a set of possible completions from a | |
6570 | list of variables. | |
6571 | ||
6572 | ll. The \[ and \] escape characters are now ignored when decoding the prompt | |
6573 | string if the shell is started with editing disabled. | |
6574 | ||
6575 | mm. Fixed a bug that could leave extra characters in a string when doing | |
6576 | quoted null character removal. | |
6577 | ||
6578 | nn. Command substitution and other subshell operations no longer reset the | |
6579 | line number (aids the bash debugger). | |
6580 | ||
6581 | oo. Better line number management when executing simple commands, conditional | |
6582 | commands, for commands, and select commands. | |
6583 | ||
6584 | pp. The globbing code now uses malloc, with its better failure properties, | |
6585 | rather than alloca(). | |
6586 | ||
6587 | qq. Fixed a bug that caused expansions like #{a[2]:=value} to create the | |
6588 | appropriate array element instead of a variable named `a[2]'. | |
6589 | ||
6590 | rr. Fixed a bug in the handling of a `?(...)' pattern immediately following | |
6591 | a `*' when extglob is enabled. | |
6592 | ||
6593 | ss. Fixed a bug that caused a `return' invoked in an exit trap when exit is | |
6594 | invoked in a function to misbehave. | |
6595 | ||
6596 | tt. Fixed a bug that caused CTLESC and CTLNUL characters to not be escaped | |
6597 | by the internal shell string quoting functions. | |
6598 | ||
6599 | uu. Fixed a bug that caused quoted null characters in an expanded word list | |
6600 | to be inappropriately assigned to an array variable when using `read -a'. | |
6601 | ||
6602 | vv. Fixed a bug that caused redirections accompanying a null command to persist | |
6603 | in the current shell. | |
6604 | ||
6605 | ww. Fixed a bug that caused the prompt to be printed when the shell was | |
6606 | expanding a multiline alias. | |
6607 | ||
6608 | xx. Fixed a bug that resulted in core dumps when the completion for a command | |
6609 | changed the compspec. | |
6610 | ||
6611 | yy. Fixed a bug that caused evaluation of programmable completions to print | |
6612 | notifications of completed jobs. | |
6613 | ||
6614 | zz. Bash now disables line editing when $EMACS == `t' and $TERM == `dumb' | |
6615 | (which is what emacs shell windows do). | |
6616 | ||
6617 | aaa. In posix mode, `kill -l' causes signal names to be displayed without | |
6618 | a leading `SIG'. | |
6619 | ||
6620 | bbb. Clear error flag on standard output so it doesn't persist across multiple | |
6621 | builtin commands. | |
6622 | ||
6623 | ccc. In posix mode, `alias' displays alias values without the leading `alias', | |
6624 | so the output cannot be used as subsequent input. | |
6625 | ||
6626 | ddd. In posix mode, the `trap' builtin doesn't check whether or not its | |
6627 | first argument is a signal specification and revert the signal handling | |
6628 | to its original disposition if it is. | |
6629 | ||
6630 | eee. Fixed several bugs in the handling of "$*" and "${array[*]}" by the | |
6631 | pattern substitution and removal expansions. | |
6632 | ||
6633 | fff. Fixed several problems with the handling of ${array[@]}, ${array[*]}, | |
6634 | $@, and $* by the indirect variable expansion code. | |
6635 | ||
6636 | ggg. Fixed a bug that did not allow `time' to be aliased. | |
6637 | ||
6638 | hhh. Improved the mail checking code so it won't check (and possibly cause an | |
6639 | NFS file system mount) until MAILPATH or MAIL is given a value -- there | |
6640 | is no default if DEFAULT_MAIL_DIRECTORY is not defined at compile time. | |
6641 | (It is computed by configure, but can be #undef'd in config-bot.h.) | |
6642 | ||
6643 | iii. If the `chkwinsize' option is enabled, the shell checks for window size | |
6644 | changes if a child process exits due to a signal. | |
6645 | ||
6646 | jjj. Removed the attempts to avoid adding a slash at the end of a completed | |
6647 | executable name if there was a directory with the same name in the | |
6648 | current directory. | |
6649 | ||
6650 | kkk. Fixed PATH lookup code so it treats the permission bits separately for | |
6651 | owner, group, and other, rather than checking them all. | |
6652 | ||
6653 | lll. Fixed the locale code to reset the parser's idea of the character class | |
6654 | <blank>, which controls how it splits tokens, when the locale changes. | |
6655 | ||
6656 | mmm. The shell now binds its special readline functions and key bindings only | |
6657 | if the user's inputrc file has not already bound them. | |
6658 | ||
6659 | nnn. The shell now reports on processes that dump core due to signals when | |
6660 | invoked as `-c command'. | |
6661 | ||
6662 | 2. Changes to Readline | |
6663 | ||
6664 | a. Fixes to avoid core dumps because of null pointer references in the | |
6665 | multibyte character code. | |
6666 | ||
6667 | b. Fix to avoid infinite recursion caused by certain key combinations. | |
6668 | ||
6669 | c. Fixed a bug that caused the vi-mode `last command' to be set incorrectly. | |
6670 | ||
6671 | d. Readline no longer tries to read ahead more than one line of input, even | |
6672 | when more is available. | |
6673 | ||
6674 | e. Fixed the code that adjusts the point to not mishandle null wide | |
6675 | characters. | |
6676 | ||
6677 | f. Fixed a bug in the history expansion `g' modifier that caused it to skip | |
6678 | every other match. | |
6679 | ||
6680 | g. Fixed a bug that caused the prompt to overwrite previous output when the | |
6681 | output doesn't contain a newline and the locale supports multibyte | |
6682 | characters. This same change fixes the problem of readline redisplay | |
6683 | slowing down dramatically as the line gets longer in multibyte locales. | |
6684 | ||
6685 | h. History traversal with arrow keys in vi insertion mode causes the cursor | |
6686 | to be placed at the end of the new line, like in emacs mode. | |
6687 | ||
6688 | i. The locale initialization code does a better job of using the right | |
6689 | precedence and defaulting when checking the appropriate environment | |
6690 | variables. | |
6691 | ||
6692 | j. Fixed the history word tokenizer to handle <( and >( better when used as | |
6693 | part of bash. | |
6694 | ||
6695 | k. The overwrite mode code received several bug fixes to improve undo. | |
6696 | ||
6697 | l. Many speedups to the multibyte character redisplay code. | |
6698 | ||
6699 | m. The callback character reading interface should not hang waiting to read | |
6700 | keyboard input. | |
6701 | ||
6702 | n. Fixed a bug with redoing vi-mode `s' command. | |
6703 | ||
6704 | o. The code that initializes the terminal tracks changes made to the terminal | |
6705 | special characters with stty(1) (or equivalent), so that these changes | |
6706 | are reflected in the readline bindings. New application-callable function | |
6707 | to make it work: rl_tty_unset_default_bindings(). | |
6708 | ||
6709 | p. Fixed a bug that could cause garbage to be inserted in the buffer when | |
6710 | changing character case in vi mode when using a multibyte locale. | |
6711 | ||
6712 | q. Fixed a bug in the redisplay code that caused problems on systems | |
6713 | supporting multibyte characters when moving between history lines when the | |
6714 | new line has more glyphs but fewer bytes. | |
6715 | ||
6716 | r. Undo and redo now work better after exiting vi insertion mode. | |
6717 | ||
6718 | s. Make sure system calls are restarted after a SIGWINCH is received using | |
6719 | SA_RESTART. | |
6720 | ||
6721 | t. Improvements to the code that displays possible completions when using | |
6722 | multibyte characters. | |
6723 | ||
6724 | u. Fixed a problem when parsing nested if statements in inputrc files. | |
6725 | ||
6726 | v. The completer now takes multibyte characters into account when looking for | |
6727 | quoted substrings on which to perform completion. | |
6728 | ||
6729 | w. The history search functions now perform better bounds checking on the | |
6730 | history list. | |
6731 | ||
6732 | 3. New Features in Bash | |
6733 | ||
6734 | a. ANSI string expansion now implements the \x{hexdigits} escape. | |
6735 | ||
6736 | b. There is a new loadable `strftime' builtin. | |
6737 | ||
6738 | c. New variable, COMP_WORDBREAKS, which controls the readline completer's | |
6739 | idea of word break characters. | |
6740 | ||
6741 | d. The `type' builtin no longer reports on aliases unless alias expansion | |
6742 | will actually be performed. | |
6743 | ||
6744 | e. HISTCONTROL is now a colon-separated list of values, which permits | |
6745 | more extensibility and backwards compatibility. | |
6746 | ||
6747 | f. HISTCONTROL may now include the `erasedups' option, which causes all lines | |
6748 | matching a line being added to be removed from the history list. | |
6749 | ||
6750 | g. `configure' has a new `--enable-multibyte' argument that permits multibyte | |
6751 | character support to be disabled even on systems that support it. | |
6752 | ||
6753 | h. New variables to support the bash debugger: BASH_ARGC, BASH_ARGV, | |
6754 | BASH_SOURCE, BASH_LINENO, BASH_SUBSHELL, BASH_EXECUTION_STRING, | |
6755 | BASH_COMMAND | |
6756 | ||
6757 | i. FUNCNAME has been changed to support the debugger: it's now an array | |
6758 | variable. | |
6759 | ||
6760 | j. for, case, select, arithmetic commands now keep line number information | |
6761 | for the debugger. | |
6762 | ||
6763 | k. There is a new `RETURN' trap executed when a function or sourced script | |
6764 | returns (not inherited child processes; inherited by command substitution | |
6765 | if function tracing is enabled and the debugger is active). | |
6766 | ||
6767 | l. New invocation option: --debugger. Enables debugging and turns on new | |
6768 | `extdebug' shell option. | |
6769 | ||
6770 | m. New `functrace' and `errtrace' options to `set -o' cause DEBUG and ERR | |
6771 | traps, respectively, to be inherited by shell functions. Equivalent to | |
6772 | `set -T' and `set -E' respectively. The `functrace' option also controls | |
6773 | whether or not the DEBUG trap is inherited by sourced scripts. | |
6774 | ||
6775 | n. The DEBUG trap is run before binding the variable and running the action | |
6776 | list in a `for' command, binding the selection variable and running the | |
6777 | query in a `select' command, and before attempting a match in a `case' | |
6778 | command. | |
6779 | ||
6780 | o. New `--enable-debugger' option to `configure' to compile in the debugger | |
6781 | support code. | |
6782 | ||
6783 | p. `declare -F' now prints out extra line number and source file information | |
6784 | if the `extdebug' option is set. | |
6785 | ||
6786 | q. If `extdebug' is enabled, a non-zero return value from a DEBUG trap causes | |
6787 | the next command to be skipped, and a return value of 2 while in a | |
6788 | function or sourced script forces a `return'. | |
6789 | ||
6790 | r. New `caller' builtin to provide a call stack for the bash debugger. | |
6791 | ||
6792 | s. The DEBUG trap is run just before the first command in a function body is | |
6793 | executed, for the debugger. | |
6794 | ||
6795 | t. `for', `select', and `case' command heads are printed when `set -x' is | |
6796 | enabled. | |
6797 | ||
6798 | u. There is a new {x..y} brace expansion, which is shorthand for {x.x+1, | |
6799 | x+2,...,y}. x and y can be integers or single characters; the sequence | |
6800 | may ascend or descend; the increment is always 1. | |
6801 | ||
6802 | v. New ksh93-like ${!array[@]} expansion, expands to all the keys (indices) | |
6803 | of array. | |
6804 | ||
6805 | w. New `force_fignore' shopt option; if enabled, suffixes specified by | |
6806 | FIGNORE cause words to be ignored when performing word completion even | |
6807 | if they're the only possibilities. | |
6808 | ||
6809 | x. New `gnu_errfmt' shopt option; if enabled, error messages follow the `gnu | |
6810 | style' (filename:lineno:message) format. | |
6811 | ||
6812 | y. New `-o bashdefault' option to complete and compgen; if set, causes the | |
6813 | whole set of bash completions to be performed if the compspec doesn't | |
6814 | result in a match. | |
6815 | ||
6816 | z. New `-o plusdirs' option to complete and compgen; if set, causes directory | |
6817 | name completion to be performed and the results added to the rest of the | |
6818 | possible completions. | |
6819 | ||
6820 | aa. `kill' is available as a builtin even when the shell is built without | |
6821 | job control. | |
6822 | ||
6823 | bb. New HISTTIMEFORMAT variable; value is a format string to pass to | |
6824 | strftime(3). If set and not null, the `history' builtin prints out | |
6825 | timestamp information according to the specified format when displaying | |
6826 | history entries. If set, bash tells the history library to write out | |
6827 | timestamp information when the history file is written. | |
6828 | ||
6829 | cc. The [[ ... ]] command has a new binary `=~' operator that performs | |
6830 | extended regular expression (egrep-like) matching. | |
6831 | ||
6832 | dd. `configure' has a new `--enable-cond-regexp' option (enabled by default) | |
6833 | to enable the =~ operator and regexp matching in [[ ... ]]. | |
6834 | ||
6835 | ee. Subexpressions matched by the =~ operator are placed in the new | |
6836 | BASH_REMATCH array variable. | |
6837 | ||
6838 | ff. New `failglob' option that causes an expansion error when pathname | |
6839 | expansion fails to produce a match. | |
6840 | ||
6841 | gg. New `set -o pipefail' option that causes a pipeline to return a failure | |
6842 | status if any of the processes in the pipeline fail, not just the last | |
6843 | one. | |
6844 | ||
6845 | 4. New Features in Readline | |
6846 | ||
6847 | a. History expansion has a new `a' modifier equivalent to the `g' modifier | |
6848 | for compatibility with the BSD csh. | |
6849 | ||
6850 | b. History expansion has a new `G' modifier equivalent to the BSD csh `g' | |
6851 | modifier, which performs a substitution once per word. | |
6852 | ||
6853 | c. All non-incremental search operations may now undo the operation of | |
6854 | replacing the current line with the history line. | |
6855 | ||
6856 | d. The text inserted by an `a' command in vi mode can be reinserted with | |
6857 | `.'. | |
6858 | ||
6859 | e. New bindable variable, `show-all-if-unmodified'. If set, the readline | |
6860 | completer will list possible completions immediately if there is more | |
6861 | than one completion and partial completion cannot be performed. | |
6862 | ||
6863 | f. There is a new application-callable `free_history_entry()' function. | |
6864 | ||
6865 | g. History list entries now contain timestamp information; the history file | |
6866 | functions know how to read and write timestamp information associated | |
6867 | with each entry. | |
6868 | ||
6869 | h. Four new key binding functions have been added: | |
6870 | ||
6871 | rl_bind_key_if_unbound() | |
6872 | rl_bind_key_if_unbound_in_map() | |
6873 | rl_bind_keyseq_if_unbound() | |
6874 | rl_bind_keyseq_if_unbound_in_map() | |
6875 | ||
6876 | ------------------------------------------------------------------------------ | |
7117c2d2 JA |
6877 | This document details the changes between this version, bash-2.05b-release, |
6878 | and the previous version, bash-2.05b-beta2. | |
6879 | ||
6880 | 1. Changes to Bash | |
6881 | ||
6882 | a. Fixed an off-by-one error in the function that translates job | |
6883 | specifications. | |
6884 | ||
6885 | b. Note that we're running under Emacs and disable line editing if | |
6886 | $EMACS == `t'. | |
6887 | ||
6888 | ------------------------------------------------------------------------------ | |
6889 | This document details the changes between this version, bash-2.05b-beta2, | |
6890 | and the previous version, bash-2.05b-beta1. | |
6891 | ||
6892 | 1. Changes to Bash | |
6893 | ||
6894 | a. Fixed the /= and %= arithmetic operators to catch division by zero. | |
6895 | ||
6896 | b. Added putenv, setenv, unsetenv to getenv replacement for completeness. | |
6897 | ||
6898 | c. Fixed a bug that could cause the -O expand_aliases invocation option | |
6899 | to not take effect. | |
6900 | ||
6901 | d. Fixed a problem with process substitution that resulted in incorrect | |
6902 | behavior when the number of process substitutions in an individual | |
6903 | command approached 64. | |
6904 | ||
6905 | 2. Changes to Readline | |
6906 | ||
6907 | a. Fixed a problem with backward-char-search when on a system with support | |
6908 | for multibyte characters when running in a locale without any multibyte | |
6909 | characters. | |
6910 | ||
6911 | ------------------------------------------------------------------------------ | |
6912 | This document details the changes between this version, bash-2.05b-beta1, | |
6913 | and the previous version, bash-2.05b-alpha1. | |
6914 | ||
6915 | 1. Changes to Bash | |
6916 | ||
6917 | a. Fixed a problem when parsing a POSIX.2 character class name while | |
6918 | evaluating a bracket expression containing multibyte characters. | |
6919 | ||
6920 | b. Changed the help text for `bind' to make it clear that any command | |
6921 | that may be placed in ~/.inputrc is a valid argument to `bind'. | |
6922 | ||
6923 | c. Added `help' builtin entries for `((', `[[', and arithmetic for. | |
6924 | ||
6925 | d. malloc updated again: | |
6926 | o slightly better overflow and underflow detection by putting the | |
6927 | chunk size at the beginning and end of the chunk and making | |
6928 | sure they match in free/realloc | |
6929 | o partial page allocated to make things page-aligned no longer | |
6930 | completely wasted | |
6931 | o block coalescing now enabled by default | |
6932 | o splitting and coalescing enabled for 32-byte chunks, the most | |
6933 | common size requested | |
6934 | o fixed a problem that resulted in spurious underflow messages and | |
6935 | aborts | |
6936 | o bin sizes are precomputed and stored in an array rather than | |
6937 | being computed at run time | |
6938 | o malloc will return memory blocks back to the system if the block | |
6939 | being freed is at the top of the heap and of sufficient size to | |
6940 | make it worthwhile | |
6941 | o malloc/free/realloc now inline memset instead of calling the | |
6942 | libc function; uses Duff's device for good performance | |
6943 | ||
6944 | e. Check for getservent(); make the service name completion code dependent | |
6945 | on its presence. | |
6946 | ||
6947 | f. Changed the readline callback that executes a command bound to a key | |
6948 | sequence to not save the executed command on the history list and to | |
6949 | save and restore the parsing state. | |
6950 | ||
6951 | g. Changes to lib/sh/snprintf.c: fixed some bugs in the `g' and `G' | |
6952 | floating point format display; implemented the "'" flag character | |
6953 | that turns on thousands' grouping; fixed behavior on systems where | |
6954 | MB_CUR_MAX does not evaluate to a constant. | |
6955 | ||
6956 | h. The `unset' builtin no longer returns a failure status when asked to | |
6957 | unset a previously-unset variable or function. | |
6958 | ||
6959 | i. Changes to the build system to make it easier to cross-compile bash | |
6960 | for different systems. | |
6961 | ||
6962 | j. Added `,' to the characters that are backslash-escaped during filename | |
6963 | completion, to avoid problems with complete-into-braces and RCS filenames | |
6964 | containing commas. | |
6965 | ||
6966 | k. Some changes to the multibyte character support code to avoid many calls | |
6967 | to strlen(). | |
6968 | ||
6969 | l. Bash now correctly honors setting LANG to some value when LC_ALL does not | |
6970 | already have a value. | |
6971 | ||
6972 | m. Fixed a bug that could cause SIGSEGV when processing nested traps with | |
6973 | trap handlers. | |
6974 | ||
6975 | n. The `source/.' builtin now restores the positional parameters when it | |
6976 | returns unless they were changed using the `set' builtin during the file's | |
6977 | execution. | |
6978 | ||
6979 | o. Fixed a bug that caused a syntax error when a command was terminated by | |
6980 | EOF. | |
6981 | ||
6982 | 2. New Features in Bash | |
6983 | ||
6984 | a. There is now support for placing the long help text into separate files | |
6985 | installed into ${datadir}/bash. Not enabled by default; can be turned | |
6986 | on with `--enable-separate-helpfiles' option to configure. | |
6987 | ||
6988 | b. All builtins that take operands accept a `--' pseudo-option, except | |
6989 | `echo'. | |
6990 | ||
6991 | c. The `echo' builtin now accepts \0xxx (zero to three octal digits following | |
6992 | the `0') in addition to \xxx (one to three octal digits) for SUSv3/XPG6/ | |
6993 | POSIX.1-2001 compliance. | |
6994 | ||
6995 | 3. Changes to Readline | |
6996 | ||
6997 | a. Fixed a small problem in _rl_insert_char with multibyte characters. | |
6998 | ||
6999 | b. Fixes from IBM for line wrapping problems when using multibyte characters. | |
7000 | ||
7001 | c. Fixed a problem which caused the display to be messed up when the last | |
7002 | line of a multi-line prompt (possibly containing invisible characters) | |
7003 | was longer than the screen width. | |
7004 | ||
8868edaf | 7005 | d. Fixed a problem with the vi-mode `r' command that occurred on systems with |
7117c2d2 JA |
7006 | support for multibyte characters when running in a locale without any |
7007 | multibyte characters. | |
7008 | ||
7009 | ------------------------------------------------------------------------------ | |
7010 | This document details the changes between this version, bash-2.05b-alpha1, | |
7011 | and the previous version, bash-2.05a-release. | |
7012 | ||
7013 | 1. Changes to Bash | |
7014 | ||
7015 | a. Some changes to work around inlining differences between compilers. | |
7016 | ||
7017 | b. Added more prototypes for internal shell typedefs, to catch argument | |
7018 | passing errors when using pointers to functions. | |
7019 | ||
7020 | c. The `cd' builtin now fails in posix mode when a valid directory cannot be | |
7021 | constructed from a relative pathname argument and the $PWD using pathname | |
7022 | canonicalization, and the -P option has not been supplied. Previously, | |
7023 | the shell would attempt to use what the user typed, leading to weird | |
7024 | values for $PWD and discrepancies between the value of $PWD and the | |
7025 | actual working directory. | |
7026 | ||
7027 | d. The `cd' builtin now resets $PWD when canonicalization fails but a chdir | |
7028 | to the pathname passed as an argument succeeds (when not in posix mode). | |
7029 | ||
7030 | e. The `fc' builtin has been fixed, as POSIX requires, to use the closest | |
7031 | history position in range when given an out-of-range argument. | |
7032 | ||
7033 | f. The history file loading code was changed to allow lines to be saved in | |
7034 | the history list from the shell startup files. | |
7035 | ||
b80f6443 | 7036 | g. `history -s args' now works better in compound commands. |
7117c2d2 JA |
7037 | |
7038 | h. The tilde expansion code was fixed to better recognize when it's being | |
7039 | invoked in an assignment context, which enables expansion after `=' | |
7040 | and `:'. | |
7041 | ||
7042 | i. Fixed the command name completion code so a slash is no longer appended | |
7043 | to a single match if there happens to be a directory with that name in | |
7044 | $PWD. | |
7045 | ||
7046 | j. Fixed compound array assignment to no longer perform alias expansion, to | |
7047 | allow reserved words as array members, and to not produce extra output | |
7048 | when the `-v' option had been enabled. | |
7049 | ||
7050 | k. Fixed the programmable completion code to better handle newlines in lists | |
7051 | of possible completions (e.g., `complete -W'). | |
7052 | ||
7053 | l. Removed the reserved words from the `bash-builtins' manual page. | |
7054 | ||
7055 | m. Parser error reporting now attempts to do a better job of identifying the | |
7056 | token in error rather than doing straight textual analysis. | |
7057 | ||
7058 | n. Fixes for Inf/NaN, locales, wide/multibyte characters and zero-length | |
7059 | arguments in the library snprintf(3) replacement. | |
7060 | ||
7061 | o. `read -e' no longer does command name completion on the first word on | |
7062 | the line being read. | |
7063 | ||
7064 | p. `select' now returns failure if the read of the user's selection fails. | |
7065 | ||
7066 | q. Fixed a bug that could cause a core dump when setting $PIPESTATUS. | |
7067 | ||
7068 | r. Fixes to not allocate so many job slots when the shell is running a loop | |
7069 | with job control enabled in a subshell of an interactive shell. | |
7070 | ||
7071 | s. Fixed a bug in the trap code that caused traps to be inherited by | |
7072 | command substitutions in some cases. | |
7073 | ||
7074 | t. Fixed a bug that could cause alias expansion to inappropriately expand | |
7075 | the word following the alias. | |
7076 | ||
7077 | u. Fixed a bug in the `kill' builtin that mishandled negative pid arguments. | |
7078 | ||
7079 | v. The parser is less lenient when parsing assignment statements where the | |
7080 | characters before the `=' don't comprise a valid identifier. | |
7081 | ||
7082 | w. The arithmetic expression evaluation code now honors the setting of the | |
7083 | `-u' option when expanding variable names. | |
7084 | ||
7085 | x. Fixed the arithmetic evaluation code to allow array subscripts to be | |
7086 | assigned (`let b[7]=42') and auto-incremented and auto-decremented | |
7087 | (e.g., b[7]++). | |
7088 | ||
7089 | y. Reimplemented the existing prompt string date and time expansions using | |
7090 | strftime(3), which changed the output of \@ in some locales. | |
7091 | ||
7092 | z. Fixed a bug that could cause a core dump when a special shell variable | |
7093 | (like RANDOM) was converted to an array with a variable assignment. | |
7094 | ||
7095 | aa. Fixed a bug that would reset the handler for a signal the user had | |
7096 | trapped to a function that would exit the shell when setting the exit | |
7097 | trap in a non-interactive shell. | |
7098 | ||
7099 | bb. Changed the execve(2) wrapper code to check whether or not a failing | |
7100 | command is a directory before looking at whether a `#!' interpreter | |
7101 | failed for some reason. | |
7102 | ||
7103 | cc. Fixed a bug in the command printing code so it no longer inserts a `;' | |
7104 | after a newline, which produces a syntax error when reused as input. | |
7105 | ||
7106 | dd. The code that expands $PS4 no longer inherits the `-x' flag. | |
7107 | ||
7108 | ee. The bash-specific completion functions may now take advantage of the | |
7109 | double-TAB and M-? features of the standard readline completion | |
7110 | functions. | |
7111 | ||
7112 | ff. The mail checking code no longer prints a message if the checked file's | |
7113 | size has not increased, even if the access time is less than the modification time. | |
7114 | ||
7115 | gg. Rewrote the variable symbol table code: there is now a stack of | |
7116 | contexts, each possibly including a separate symbol table; there can | |
7117 | be more than one temporary environment supplied to nested invocations | |
7118 | of `./source'; the temporary environments no longer require so much | |
7119 | special-case code; shell functions now handle the temporary environment | |
7120 | and local variables more consistently; function scope exit is faster now | |
7121 | that the entire symbol table does not have to be traversed to dispose of | |
7122 | local variables; it is now easier to push vars from the temporary | |
7123 | environment to the shell's variable table in posix mode; some duplicated | |
7124 | code has been removed. | |
7125 | ||
7126 | hh. Regularized the error message printing code; builtin_error is now called | |
7127 | more consistently, and common error message strings are handled by small | |
7128 | functions. This should make eventual message translation easier. | |
7129 | ||
7130 | ii. Error messages now include the line number in a script when the shell | |
7131 | is not interactive. | |
7132 | ||
7133 | jj. Array subscript expansion now takes place even when the array variable is | |
7134 | unset, so side effects will take place. | |
7135 | ||
7136 | kk. Fixed a bug in the SICGHLD child-reaping code so that it won't find | |
7137 | jobs already marked as terminated if the OS reuses pids quickly enough. | |
7138 | ||
7139 | ll. Fixed a bug that could cause a signal to not interrupt the `wait' | |
7140 | builtin while it was waiting for a background process to terminate. | |
7141 | ||
7142 | mm. A couple of changes to make it easier for multiple shells to share history | |
7143 | files using `history -n', `history -r', and `history -w'. | |
7144 | ||
7145 | nn. The `getopts' builtin always increments OPTIND to point to the next | |
7146 | option to be handled when an option is returned, whether it's valid | |
7147 | or not, as POSIX 1003.x-2001 requires. | |
7148 | ||
7149 | oo. Changed some parts of the expansion code to avoid allocating and | |
7150 | immediately freeing memory without using the results for anything. | |
7151 | ||
7152 | pp. The shell now keeps track of $IFS internally, updating its internal map | |
7153 | each time the variable is assigned a new value (or at local scope exit). | |
7154 | This saves thousands of hash lookups for IFS, which, while individually | |
7155 | cheap, add up. | |
7156 | ||
7157 | qq. Rewrote the hash table code: searching and insertion are much faster now, | |
7158 | and it uses a better string hashing function; augmented the function | |
7159 | interface to simplify other parts of the code and remove duplicated code | |
7160 | ||
7161 | rr. The shell now uses a simple, generic `object cache' for allocating and | |
7162 | caching words and word lists, which were the major users of | |
7163 | malloc/free. | |
7164 | ||
7165 | ss. Fixed the assignment statement parsing code to allow whitespace and | |
7166 | newlines in subscripts when performing array element assignment. | |
7167 | ||
7168 | tt. The shell now issues many fewer calls to sigprocmask and other signal | |
7169 | masking system calls. | |
7170 | ||
7171 | uu. Fixed the `test' and conditional command file comparison operators to | |
7172 | work right when one file has a non-positive timestamp and the other | |
7173 | does not exist. | |
7174 | ||
7175 | vv. Fixed some cases where the special characters '\001' and '\177' in the | |
7176 | values of variables or positional parameters caused incorrect expansion | |
7177 | results. | |
7178 | ||
7179 | 2. Changes to Readline | |
7180 | ||
7181 | a. Fixed output of comment-begin character when listing variable values. | |
7182 | ||
7183 | b. Added some default key bindings for common escape sequences produced by | |
7184 | HOME and END keys. | |
7185 | ||
7186 | c. Fixed the mark handling code to be more emacs-compatible. | |
7187 | ||
7188 | d. A bug was fixed in the code that prints possible completions to keep it | |
7189 | from printing empty strings in certain circumstances. | |
7190 | ||
7191 | e. Change the key sequence printing code to print ESC as M\- if ESC is a | |
7192 | meta-prefix character -- it's easier for users to understand than \e. | |
7193 | ||
7194 | f. Fixed unstifle_history() to return values that match the documentation. | |
7195 | ||
7196 | g. Fixed the event loop (rl_event_hook) to handle the case where the input | |
7197 | file descriptor is invalidated. | |
7198 | ||
7199 | h. Fixed the prompt display code to work better when the application has a | |
7200 | custom redisplay function. | |
7201 | ||
7202 | i. Changes to make reading and writing the history file a little faster, and | |
7203 | to cope with huge history files without calling abort(3) from xmalloc. | |
7204 | ||
7205 | j. The vi-mode `S' and `s' commands are now undone correctly. | |
7206 | ||
7207 | 3. New Features in Bash | |
7208 | ||
7209 | a. If set, TMOUT is the default timeout for the `read' builtin. | |
7210 | ||
7211 | b. `type' has two new options: `-f' suppresses shell function lookup, and | |
7212 | `-P' forces a $PATH search. | |
7213 | ||
7214 | c. New code to handle multibyte characters. | |
7215 | ||
7216 | d. `select' was changed to be more ksh-compatible, in that the menu is | |
7217 | reprinted each time through the loop only if REPLY is set to NULL. | |
7218 | The previous behavior is available as a compile-time option. | |
7219 | ||
7220 | e. `complete -d' and `complete -o dirnames' now force a slash to be | |
7221 | appended to names which are symlinks to directories. | |
7222 | ||
7223 | f. There is now a bindable edit-and-execute-command readline command, | |
7224 | like the vi-mode `v' command, bound to C-xC-e in emacs mode. | |
7225 | ||
7226 | g. Added support for ksh93-like [:word:] character class in pattern matching. | |
7227 | ||
7228 | h. The $'...' quoting construct now expands \cX to Control-X. | |
7229 | ||
7230 | i. A new \D{...} prompt expansion; passes the `...' to strftime and inserts | |
7231 | the result into the expanded prompt. | |
7232 | ||
7233 | j. The shell now performs arithmetic in the largest integer size the | |
7234 | machine supports (intmax_t), instead of long. | |
7235 | ||
7236 | k. If a numeric argument is supplied to one of the bash globbing completion | |
7237 | functions, a `*' is appended to the word before expansion is attempted. | |
7238 | ||
7239 | l. The bash globbing completion functions now allow completions to be listed | |
7240 | with double tabs or if `show-all-if-ambiguous' is set. | |
7241 | ||
7242 | m. New `-o nospace' option for `complete' and `compgen' builtins; suppresses | |
7243 | readline's appending a space to the completed word. | |
7244 | ||
7245 | n. New `here-string' redirection operator: <<< word. | |
7246 | ||
7247 | o. When displaying variables, function attributes and definitions are shown | |
7248 | separately, allowing them to be re-used as input (attempting to re-use | |
7249 | the old output would result in syntax errors). | |
7250 | ||
7251 | p. There is a new configuration option `--enable-mem-scramble', controls | |
7252 | bash malloc behavior of writing garbage characters into memory at | |
7253 | allocation and free time. | |
7254 | ||
7255 | q. The `complete' and `compgen' builtins now have a new `-s/-A service' | |
7256 | option to complete on names from /etc/services. | |
7257 | ||
7258 | r. `read' has a new `-u fd' option to read from a specified file descriptor. | |
7259 | ||
7260 | s. Fix the completion code so that expansion errors in a directory name | |
7261 | don't cause a longjmp back to the command loop. | |
7262 | ||
7263 | t. Fixed word completion inside command substitution to work a little more | |
7264 | intuitively. | |
7265 | ||
7266 | u. The `printf' %q format specifier now uses $'...' quoting to print the | |
7267 | argument if it contains non-printing characters. | |
7268 | ||
7269 | v. The `declare' and `typeset' builtins have a new `-t' option. When applied | |
7270 | to functions, it causes the DEBUG trap to be inherited by the named | |
7271 | function. Currently has no effect on variables. | |
7272 | ||
7273 | w. The DEBUG trap is now run *before* simple commands, ((...)) commands, | |
7274 | [[...]] conditional commands, and for ((...)) loops. | |
7275 | ||
7276 | x. The expansion of $LINENO inside a shell function is only relative to the | |
7277 | function start if the shell is interactive -- if the shell is running a | |
7278 | script, $LINENO expands to the line number in the script. This is as | |
7279 | POSIX-2001 requires. | |
7280 | ||
7281 | y. The bash debugger in examples/bashdb has been modified to work with the | |
7282 | new DEBUG trap semantics, the command set has been made more gdb-like, | |
7283 | and the changes to $LINENO make debugging functions work better. Code | |
7284 | from Gary Vaughan. | |
7285 | ||
7286 | z. New [n]<&word- and [n]>&word- redirections from ksh93 -- move fds (dup | |
7287 | and close). | |
7288 | ||
7289 | aa. There is a new `-l' invocation option, equivalent to `--login'. | |
7290 | ||
7291 | bb. The `hash' builtin has a new `-l' option to list contents in a reusable | |
7292 | format, and a `-d' option to remove a name from the hash table. | |
7293 | ||
7294 | 4. New Features in Readline | |
7295 | ||
7296 | a. Support for key `subsequences': allows, e.g., ESC and ESC-a to both | |
7297 | be bound to readline functions. Now the arrow keys may be used in vi | |
7298 | insert mode. | |
7299 | ||
7300 | b. When listing completions, and the number of lines displayed is more than | |
7301 | the screen length, readline uses an internal pager to display the results. | |
7302 | This is controlled by the `page-completions' variable (default on). | |
7303 | ||
7304 | c. New code to handle editing and displaying multibyte characters. | |
7305 | ||
7306 | d. The behavior introduced in bash-2.05a of deciding whether or not to | |
7307 | append a slash to a completed name that is a symlink to a directory has | |
7308 | been made optional, controlled by the `mark-symlinked-directories' | |
7309 | variable (default is the 2.05a behavior). | |
7310 | ||
7311 | e. The `insert-comment' command now acts as a toggle if given a numeric | |
7312 | argument: if the first characters on the line don't specify a | |
7313 | comment, insert one; if they do, delete the comment text | |
7314 | ||
7315 | f. New application-settable completion variable: | |
7316 | rl_completion_mark_symlink_dirs, allows an application's completion | |
7317 | function to temporarily override the user's preference for appending | |
7318 | slashes to names which are symlinks to directories. | |
7319 | ||
7320 | g. New function available to application completion functions: | |
7321 | rl_completion_mode, to tell how the completion function was invoked | |
7322 | and decide which argument to supply to rl_complete_internal (to list | |
7323 | completions, etc.). | |
7324 | ||
7325 | h. Readline now has an overwrite mode, toggled by the `overwrite-mode' | |
7326 | bindable command, which could be bound to `Insert'. | |
7327 | ||
7328 | i. New application-settable completion variable: | |
7329 | rl_completion_suppress_append, inhibits appending of | |
7330 | rl_completion_append_character to completed words. | |
7331 | ||
7332 | j. New key bindings when reading an incremental search string: ^W yanks | |
7333 | the currently-matched word out of the current line into the search | |
7334 | string; ^Y yanks the rest of the current line into the search string, | |
7335 | DEL or ^H deletes characters from the search string. | |
7336 | ||
7337 | ------------------------------------------------------------------------------ | |
f73dda09 JA |
7338 | This document details the changes between this version, bash-2.05a-release, |
7339 | and the previous version, bash-2.05a-rc1. | |
7340 | ||
7341 | 1. Changes to Bash | |
7342 | ||
7343 | a. Fixed the `printf' builtin so that the variable name supplied as an | |
7344 | argument to a %n conversion must be a valid shell identifier. | |
7345 | ||
7346 | b. Improved the random number generator slightly. | |
7347 | ||
7348 | c. Changes to configuration to not put -I/usr/include into $CFLAGS, since | |
7349 | it messes up some includes. | |
7350 | ||
7351 | d. Corrected description of POSIXLY_CORRECT in man page and info manual. | |
7352 | ||
7353 | e. Fixed a couple of cases of incorrect function prototypes that sneaked | |
7354 | through and caused compilation problems. | |
7355 | ||
7356 | f. A few changes to avoid potential core dumps in the programmable completion | |
7357 | code. | |
7358 | ||
7359 | g. Fixed a configure problem that could cause a non-existent file to show | |
7360 | up in LIBOBJS. | |
7361 | ||
7362 | h. Fixed a configure problem that could cause siglist.o to not be built when | |
7363 | required. | |
7364 | ||
7365 | i. Changes to the strtoimax and strtoumax replacement functions to work | |
7366 | around buggy compilers. | |
7367 | ||
7368 | j. Fixed a problem with the snprintf replacement function that could | |
7369 | potentially cause a core dump. | |
7370 | ||
7371 | 2. Changes to Readline | |
7372 | ||
7373 | a. Fixed a locale-specific problem in the vi-mode `goto mark' command. | |
7374 | ||
7375 | b. Fixed Makefile to not put -I/usr/include into CFLAGS, since it can cause | |
7376 | include file problems. | |
7377 | ||
7378 | ------------------------------------------------------------------------------ | |
7379 | This document details the changes between this version, bash-2.05a-rc1, | |
7380 | and the previous version, bash-2.05a-beta1. | |
7381 | ||
7382 | 1. Changes to Bash | |
7383 | ||
7384 | a. Fixed the snprintf replacement to correctly implement the `alternate form' | |
7385 | of the %g and %G conversions. | |
7386 | ||
7387 | b. Fixed snprintf to correctly handle the optional precision with the %g and | |
7388 | %G conversions. | |
7389 | ||
7390 | c. Fixed the arithmetic evaluation code to correct the values of `@' and `_' | |
7391 | when translating base-64 constants (they were backwards). | |
7392 | ||
7393 | d. New library functions for formatting long and long long ints. | |
7394 | ||
7395 | e. Fixed a few places where negative array subscripts could have occurred, | |
7396 | mostly as the result of systems using signed characters. | |
7397 | ||
7398 | f. Fixed a few places that assumed a pid_t was no wider than an int. | |
7399 | ||
7400 | g. Fixed the `maildir' mail checking code to work on systems where a | |
7401 | `struct stat' doesn't include an `st_blocks' member. | |
7402 | ||
7403 | h. Fixed snprintf to make `unsigned long long' conversion formats (%llu) | |
7404 | work better. | |
7405 | ||
7406 | i. Fixed snprintf to not print a sign when asked to do an unsigned conversion. | |
7407 | ||
7408 | j. Made configure changes to avoid compiling empty source files in lib/sh. | |
7409 | ||
7410 | k. New replacement functions (if necessary) for strtoull, strtoll, strtoimax, | |
7411 | strtoumax. | |
7412 | ||
7413 | l. The `printf' builtin now handles the `ll' and `j' length modifiers | |
7414 | directly, since they can affect the type and width of the argument | |
7415 | passed to printf(3). | |
7416 | ||
7417 | m. Renamed a number of the bash-specific autoconf macros in aclocal.m4 to | |
8868edaf | 7418 | have more systematic naming, with accompanying changes to configure.in. |
f73dda09 JA |
7419 | |
7420 | n. Fixed snprintf to handle long doubles and the %a/%A conversions by | |
7421 | falling back to sprintf, as long as sprintf supports them. | |
7422 | ||
7423 | o. Fixed return value from vsnprintf/snprintf to be the number of characters | |
7424 | that would have been printed, even if that number exceeds the buffer | |
7425 | size passed as an argument. | |
7426 | ||
7427 | p. Bash no longer attempts to define its own versions of some ctype macros | |
7428 | if they are implemented as functions in libc but not as macros in | |
7429 | <ctype.h>. | |
7430 | ||
7431 | q. Changed the variable printing code (used by `set', `export', etc.) to | |
7432 | not use the $'...' syntax when in posix mode, since that caused | |
7433 | interoperability problems with other shells (most notably with autoconf). | |
7434 | When not in posix mode, it uses $'...' if the string to be printed | |
7435 | contains non-printing characters and regular single quotes otherwise. | |
7436 | ||
7437 | r. snprintf now recognizes the %F conversion. | |
7438 | ||
7439 | s. Fixed a bug that could cause the wrong status to be returned by a shell | |
7440 | function when the shell is compiled without job control and a null | |
7441 | command containing a command substutition was executed in the function. | |
7442 | ||
7443 | t. When in posix mode, the default value for MAILCHECK is 600. | |
7444 | ||
7445 | u. Bash only initializes FUNCNAME, GROUPS, and DIRSTACK as special variables | |
7446 | if they're not in the initial environment. | |
7447 | ||
7448 | v. If SECONDS appears in the initial environment with a valid integer value, | |
7449 | bash uses that as the starting value, as if an assignment had been | |
7450 | performed. | |
7451 | ||
7452 | w. Bash no longer auto-exports HOME, PATH, SHELL, or TERM, even though it | |
7453 | gives them default values if they don't appear in the initial environment. | |
7454 | ||
7455 | x. Bash no longer auto-exports HOSTNAME, HOSTTYPE, MACHTYPE, or OSTYPE, | |
7456 | even if it assigns them default values. | |
7457 | ||
7458 | y. Bash no longer removes the export attribute from SSH_CLIENT or SSH2_CLIENT | |
7459 | if they appear in the initial environment. | |
7460 | ||
7461 | z. Bash no longer attempts to discover if it's being run by sshd in order to | |
7462 | run the startup files. If the SSH_SOURCE_BASHRC is uncommented in | |
7463 | config-top.h it will attempt to do so as previously, but that's commented | |
7464 | out in the distributed version. | |
7465 | ||
7466 | aa. Fixed a typo in the code that tests for LC_NUMERIC. | |
7467 | ||
7468 | bb. The POSIXLY_CORRECT shell variable and its effects are now documented. | |
7469 | ||
7470 | cc. Some changes to several of the support shell scripts included in the | |
7471 | definitions to try to avoid race conditions and attacks. | |
7472 | ||
7473 | dd. Several changes to avoid warnings from `gcc -Wall'. | |
7474 | ||
7475 | ee. Fixed a problem with the `unset' builtin that could cause incorrect | |
7476 | results if asked to unset a variable and an array subscript in the | |
7477 | same command. | |
7478 | ||
7479 | ff. A few changes to the shell's temporary file creation code to avoid | |
7480 | potential file descriptor leaks and to prefer the system's idea of | |
7481 | the temporary directory to use. | |
7482 | ||
7483 | gg. Fixes to build with the C alloca in lib/malloc/alloca.c if the system | |
7484 | requires it but the shell has been configured --without-bash-malloc. | |
7485 | ||
7486 | hh. Updated the documentation to note that only interactive shells resend | |
7487 | SIGHUP to all jobs before exiting. | |
7488 | ||
7489 | ii. Fixes to only pass unquoted tilde words to tilde_expand, rather than | |
7490 | rely on tilde_expand or getpwnam(3) to handle the quotes (MacOS 10.x | |
7491 | will remove backslashes in any login name passed to getpwnam(3)). | |
7492 | ||
7493 | jj. Small change from Paul Eggert to make LINENO right in commands run with | |
7494 | `bash -c'. | |
7495 | ||
7496 | 2. New Features in Bash | |
7497 | ||
7498 | a. The `printf' builtin now handles the %a and %A conversions if they're | |
7499 | implemented by printf(3). | |
7500 | ||
7501 | b. The `printf' builtin now handles the %F conversion (just about like %f). | |
7502 | ||
7503 | c. The `printf' builtin now handles the %n conversion like printf(3). The | |
7504 | corresponding argument is the name of a shell variable to which the | |
7505 | value is assigned. | |
7506 | ||
7507 | 3. Changes to Readline | |
7508 | ||
7509 | a. Fixed a few places where negative array subscripts could have occurred. | |
7510 | ||
7511 | b. Fixed the vi-mode code to use a better method to determine the bounds of | |
7512 | the array used to hold the marks. | |
7513 | ||
7514 | c. Fixed the defines in chardefs.h to work better when chars are signed. | |
7515 | ||
7516 | d. Fixed configure.in to use the new names for bash autoconf macros. | |
7517 | ||
7518 | e. Readline no longer attempts to define its own versions of some ctype | |
7519 | macros if they are implemented as functions in libc but not as macros in | |
7520 | <ctype.h>. | |
7521 | ||
7522 | f. Fixed a problem where rl_backward could possibly set point to before | |
7523 | the beginning of the line. | |
7524 | ||
7525 | ------------------------------------------------------------------------------ | |
7526 | This document details the changes between this version, bash-2.05a-beta1, | |
7527 | and the previous version, bash-2.05a-alpha1. | |
7528 | ||
7529 | 1. Changes to Bash | |
7530 | ||
8868edaf | 7531 | a. Fixed a bug in the evaluation of arithmetic `for' statements when the |
f73dda09 JA |
7532 | expanded expression is NULL. |
7533 | ||
7534 | b. Fixed an unassigned variable problem in the redirection printing code. | |
7535 | ||
7536 | c. Added more prototypes to extern function declarations in the header | |
7537 | files and to static function declarations in C source files. | |
7538 | ||
7539 | d. Make sure called functions have a prototype in scope, to get the arguments | |
7540 | and return values right instead of casting. Removed extern function | |
7541 | declarations from C source files that were already included in header | |
7542 | files. | |
7543 | ||
7544 | e. Changed some function arguments to use function typedefs in general.h so | |
7545 | the prototypes can be checked. The only use of Function and VFunction | |
7546 | now is for unwind-protects. | |
7547 | ||
7548 | f. More const changes to function arguments and appropriate variables. | |
7549 | ||
7550 | g. Changed the mail checking support to handle `maildir'-style mail | |
7551 | directories. | |
7552 | ||
7553 | h. Augmented the bash malloc to pass in the file and line number information | |
7554 | for each malloc, realloc, and free. This should result in better error | |
7555 | messages. | |
7556 | ||
7557 | i. The `old' gnu malloc is no longer a configuration option. | |
7558 | ||
7559 | j. Augmented the bash malloc with optional tracing and registering allocated | |
7560 | and freed memory. | |
7561 | ||
7562 | k. Prompt string decoding now saves and restores the value of $? when it | |
7563 | expands the prompt string, so command substitutions don't change $?. | |
7564 | ||
7565 | i. Array indices are now `long', since shell arithmetic is performed as long, | |
7566 | and the internal arrayind_t type is used consistently. | |
7567 | ||
7568 | j. Some more `unsigned char *' fixes from Paul Eggert. | |
7569 | ||
7570 | k. Fixed a bad call to builtin_error that could cause core dumps when making | |
7571 | local variables. | |
7572 | ||
7573 | l. `return' may no longer be used to terminate a `select' command, for | |
7574 | compatibility with ksh. | |
7575 | ||
7576 | m. Changed code that reads octal numbers to do a better job of detecting | |
7577 | overflows. | |
7578 | ||
7579 | n. The time formatting code no longer uses absolute indices into a buffer, | |
7580 | because the buffer size changes depending on the size of a `time_t'. | |
7581 | ||
7582 | o. `umask' now prints four digits when printing in octal mode, for | |
7583 | compatibility with other shells. | |
7584 | ||
7585 | p. Lots of changes to the `printf' builtin from Paul Eggert: it handles `L' | |
7586 | formats and long doubles better, and internal functions have been | |
8868edaf | 7587 | simplified where appropriate. |
f73dda09 JA |
7588 | |
7589 | q. Some `time_t' fixes for machines were a time_t is bigger than a long. | |
7590 | ||
7591 | r. Replaced some bash-specific autoconf macros with standard equivalents. | |
7592 | ||
7593 | s. Improvmed the code that constructs temporary filenames to make the | |
7594 | generated names a bit more random. | |
7595 | ||
7596 | t. Added code that checks for ascii before calling any of the is* ctype | |
7597 | functions. | |
7598 | ||
7599 | u. Changed some places where a `char' was used as an array subscript to use | |
7600 | `unsigned char', since a `char' can be negative if it's signed by default. | |
7601 | ||
7602 | v. Lots of changes to the `ulimit' builtin from Paul Eggert to add support | |
7603 | for the new POSIX-200x RLIM_SAVED_CUR and RLIM_SAVED_MAX values and | |
7604 | simplify the code. | |
7605 | ||
7606 | w. `ulimit' now prints the description of a resource in any error message | |
7607 | relating to fetching or setting that resource's limits. | |
7608 | ||
7609 | x. The `snprintf' replacement now computes maximum values at compile | |
7610 | time rather than using huge constants for things like long long. | |
7611 | ||
7612 | y. Interactive shells now ignore `set -n'. | |
7613 | ||
7614 | z. Changed the malloc bookkeeping information so that it's now 8 bytes | |
7615 | instead of 12 on most 32-bit machines (saving 4 bytes per allocation), | |
7616 | restoring 8-byte alignment. | |
7617 | ||
7618 | aa. The malloc error reporting code now attempts to print the file and line | |
7619 | number of the call that caused the error. | |
7620 | ||
7621 | bb. Changed the redirection error reporting code to catch EBADF errors and | |
7622 | report the file descriptor number rather than the file being redirected | |
7623 | to or from (e.g., things like `exec 4242<x' where 4242 is an out-of-range | |
7624 | file descriptor). | |
7625 | ||
7626 | cc. `printf', `echo -e', and the $'...' code now process only two hex digits | |
7627 | after a `\x' escape sequence for compatibility with other shells, and | |
7628 | the documentation was changed to note that the octal and hex escape | |
7629 | sequences result in an eight-bit value rather than strict ASCII. | |
7630 | ||
7631 | 2. Changes to Readline | |
7632 | ||
7633 | a. The completion code now attempts to do a better job of preserving the | |
7634 | case of the word the user typed if ignoring case in completions. | |
7635 | ||
7636 | b. Readline defaults to not echoing the input and lets the terminal | |
7637 | initialization code enable echoing if there is a controlling terminal. | |
7638 | ||
7639 | c. The key binding code now processes only two hex digits after a `\x' | |
7640 | escape sequence, and the documentation was changed to note that the | |
7641 | octal and hex escape sequences result in an eight-bit value rather | |
7642 | than strict ASCII. | |
7643 | ||
7644 | 3. New Features in Bash | |
7645 | ||
7646 | a. The builtin `ulimit' now takes two new non-numeric arguments: `hard', | |
7647 | meaning the current hard limit, and `soft', meaning the current soft | |
7648 | limit, in addition to `unlimited' | |
7649 | ||
7650 | b. `ulimit' now prints the option letter associated with a particular | |
7651 | resource when printing more than one limit. | |
7652 | ||
7653 | c. `ulimit' prints `hard' or `soft' when a value is not `unlimited' but is | |
7654 | one of RLIM_SAVED_MAX or RLIM_SAVED_CUR, respectively. | |
7655 | ||
7656 | 4. New Features in Readline | |
7657 | ||
7658 | a. New bindable variable `history-preserve-point'. If set, the history | |
7659 | code attempts to place the user at the same location on each history | |
8868edaf | 7660 | line retrieved with previous-history or next-history. |
f73dda09 JA |
7661 | |
7662 | ------------------------------------------------------------------------------ | |
7663 | This document details the changes between this version, bash-2.05a-alpha1, | |
7664 | and the previous version, bash-2.05-release. | |
7665 | ||
7666 | 1. Changes to Bash | |
7667 | ||
7668 | a. Better checks in the redirection code for write errors. | |
7669 | ||
7670 | b. bashbug now uses $TMPDIR, defaulting to /tmp, and uses mktemp(1) more | |
7671 | portably. | |
7672 | ||
7673 | c. System-specific configuration changes for: Interix, OpenBSD, FreeBSD, | |
7674 | MacOS X. | |
7675 | ||
7676 | d. Some more `const' cleanups through the code. | |
7677 | ||
7678 | e. Fixed a typo in the /dev/fd redirection code, better checks for valid | |
7679 | numeric fds in /dev/fd. | |
7680 | ||
7681 | f. Fixed many parts of the shell to handle integer overflow more gracefully | |
7682 | and to do more stringent checks for valid numbers. | |
7683 | ||
7684 | g. Fixed mksignames to include config.h. | |
7685 | ||
7686 | h. Fixed an uninitialized variable problem that could cause the shell to core | |
7687 | dump when replacing characters in a string. | |
7688 | ||
7689 | i. New mechanism for updating the patch level when official patches are | |
7690 | released (patchlevel.h). | |
7691 | ||
7692 | j. configure.in changed to no longer require external files _distribution and | |
7693 | _patchlevel. | |
7694 | ||
7695 | k. Fixed non-interactive shell initialization problem when bash started as | |
7696 | `bash -i filename'. | |
7697 | ||
7698 | l. Fixed printf builtin conversion error handling to be POSIX.2-conformant. | |
7699 | ||
7700 | m. autoconf-2.52 is now used to build configure; autoconf-2.50 or newer is | |
7701 | required. Some of the bash-specific macros were removed, since they are | |
7702 | now standard. | |
7703 | ||
7704 | n. Startup files and files read with source or `.' are no longer required to | |
7705 | be regular files. | |
7706 | ||
7707 | o. Fixed core dump in builtin printf when user-supplied precision or field | |
7708 | width is 0. | |
7709 | ||
7710 | p. Fixed builtin printf to treat a negative field width as a positive field | |
7711 | width with left-justification. | |
7712 | ||
7713 | r. New unwind-protect implementation from Paul Eggert. | |
7714 | ||
7715 | s. Fixed an inadvertently-unclosed comment in the bash completion code that | |
7716 | caused programmable completions to not add trailing slashes or spaces to | |
7717 | completions. | |
7718 | ||
7719 | t. Fixed the process substitution code to cope better when stdin is closed. | |
7720 | ||
7721 | v. Fixes, mostly from Paul Eggert, for a few possible buffer overflows in | |
7722 | the shell. | |
7723 | ||
7724 | w. Fixes from Paul Eggert to avoid most of the type casts in the shell code, | |
7725 | and use more appropriate types for a number of variables. | |
7726 | ||
8868edaf | 7727 | x. Command substitution no longer inherits the DEBUG trap. |
f73dda09 | 7728 | |
8868edaf | 7729 | y. Some fixes to the process substitution code on machines without /dev/fd so |
f73dda09 JA |
7730 | that named pipes are not removed inappropriately. |
7731 | ||
7732 | z. The loadable `getconf' builtin is now much more complete, and will become | |
7733 | part of the shell in the future. | |
7734 | ||
7735 | aa. The select command no longer terminates on a `return', so it can be used | |
7736 | to return from an enclosing function (as ksh does it). | |
7737 | ||
7738 | bb. Fixed the extended pattern matching code to behave better when presented | |
7739 | with incorrectly-formed patterns. | |
7740 | ||
7741 | cc. Some changes were made with the intent of making cross-compilation easier. | |
7742 | ||
7743 | dd. The network code (/dev/tcp and /dev/udp redirections) uses getaddrinfo(3) | |
7744 | if it's available, which adds support for IPv6. | |
7745 | ||
7746 | ee. Subshells of login shells no longer source ~/.bash_logout when they exit. | |
7747 | ||
7748 | ff. Fixes so that subshells don't exit inappropriately if the -e option has | |
7749 | been set. | |
7750 | ||
7751 | gg. Restricted shells no longer allow functions to be exported. | |
7752 | ||
7753 | hh. Changes to the pattern matching code so extended pattern matching works | |
7754 | on systems with deficient shared library implementations, like MacOS X. | |
7755 | ||
7756 | ii. Better error messages when a script with a leading `#!interp' fails | |
7757 | to execute because of problems with `interp'. | |
7758 | ||
7759 | jj. Fixed `compgen' to handle the `-o default' option better. | |
7760 | ||
7761 | kk. Fixed the job control code to force an asynchronous process's standard | |
7762 | input to /dev/null only if job control is not active. | |
7763 | ||
7764 | ll. Fixed a possible infinite recursion problem when `fc ""=abc' (a null | |
7765 | pattern) is used to re-execute a previous command. | |
7766 | ||
7767 | mm. Fixed `declare [-a] var=value' to assign VALUE to element 0 if VAR is an | |
7768 | array variable. Similarly for `declare [-a] var[N]=value'. This is like | |
7769 | ksh93. | |
7770 | ||
7771 | nn. Fixed a bug that caused `read -a aname' to work even if ANAME had been | |
7772 | declared readonly. | |
7773 | ||
7774 | oo. Fixed a possible integer overflow problem when constructing names for | |
7775 | temporary files. | |
7776 | ||
7777 | 2. New Features in Bash | |
7778 | ||
7779 | a. Added support for DESTDIR installation root prefix, so you can do a | |
7780 | `make install DESTDIR=bash-root' and do easier binary packaging. | |
7781 | ||
7782 | b. Added support for builtin printf "'" flag character as per latest POSIX | |
7783 | drafts. | |
7784 | ||
7785 | c. Support for POSIX.2 printf(1) length specifiers `j', `t', and `z' (from | |
7786 | ISO C99). | |
7787 | ||
7788 | d. New autoconf macro, RL_LIB_READLINE_VERSION, for use by other applications | |
7789 | (bash doesn't use very much of what it returns). | |
7790 | ||
7791 | e. `set [-+]o nolog' is recognized as required by the latest POSIX drafts, | |
7792 | but ignored. | |
7793 | ||
7794 | f. New read-only `shopt' option: login_shell. Set to non-zero value if the | |
7795 | shell is a login shell. | |
7796 | ||
7797 | g. New `\A' prompt string escape sequence; expands to time in 24 HH:MM format. | |
7798 | ||
7799 | h. New `-A group/-g' option to complete and compgen; does group name | |
7800 | completion. | |
7801 | ||
7802 | i. New `-t' option to `hash' to list hash values for each filename argument. | |
7803 | ||
7804 | j. New [-+]O invocation option to set and unset `shopt' options at startup. | |
7805 | ||
7806 | k. configure's `--with-installed-readline' option now takes an optional | |
7807 | `=PATH' suffix to set the root of the tree where readline is installed | |
7808 | to PATH. | |
7809 | ||
7810 | l. The ksh-like `ERR' trap has been added. The `ERR' trap will be run | |
7811 | whenever the shell would have exited if the -e option were enabled. | |
7812 | It is not inherited by shell functions. | |
7813 | ||
7814 | m. `readonly', `export', and `declare' now print variables which have been | |
7815 | given attributes but not set by assigning a value as just a command and | |
7816 | a variable name (like `export foo') when listing, as the latest POSIX | |
7817 | drafts require. | |
7818 | ||
7819 | n. `bashbug' now requires that the subject be changed from the default. | |
7820 | ||
7821 | o. configure has a new `--enable-largefile' option, like other GNU utilities. | |
7822 | ||
7823 | p. `for' loops now allow empty word lists after `in', like the latest POSIX | |
7824 | drafts require. | |
7825 | ||
7826 | 3. Changes to Readline | |
7827 | ||
7828 | a. More `const' and type casting fixes. | |
7829 | ||
7830 | b. Changed rl_message() to use vsnprintf(3) (if available) to fix buffer | |
7831 | overflow problems. | |
7832 | ||
7833 | c. The completion code no longer appends a `/' or ` ' to a match when | |
7834 | completing a symbolic link that resolves to a directory name, unless | |
7835 | the match does not add anything to the word being completed. This | |
7836 | means that a tab will complete the word up to the full name, but not | |
7837 | add anything, and a subsequent tab will add a slash. | |
7838 | ||
7839 | d. Fixed a trivial typo that made the vi-mode `dT' command not work. | |
7840 | ||
7841 | e. Fixed the tty code so that ^S and ^Q can be inserted with rl_quoted_insert. | |
7842 | ||
7843 | f. Fixed the tty code so that ^V works more than once. | |
7844 | ||
7845 | g. Changed the use of __P((...)) for function prototypes to PARAMS((...)) | |
7846 | because the use of __P in typedefs conflicted g++ and glibc. | |
7847 | ||
7848 | 4. New Features in Readline | |
7849 | ||
7850 | a. Added extern declaration for rl_get_termcap to readline.h, making it a | |
7851 | public function (it was always there, just not in readline.h). | |
7852 | ||
7853 | b. New #defines in readline.h: RL_READLINE_VERSION, currently 0x0402, | |
7854 | RL_VERSION_MAJOR, currently 4, and RL_VERSION_MINOR, currently 2. | |
7855 | ||
7856 | c. New readline variable: rl_readline_version, mirrors RL_READLINE_VERSION. | |
7857 | ||
7858 | d. New bindable boolean readline variable: match-hidden-files. Controls | |
7859 | completion of files beginning with a `.' (on Unix). Enabled by default. | |
7860 | ||
7861 | e. The history expansion code now allows any character to terminate a | |
7862 | `:first-' modifier, like csh. | |
7863 | ||
7864 | f. The incremental search code remembers the last search string and uses | |
7865 | it if ^R^R is typed without a search string. | |
7866 | ||
7867 | ------------------------------------------------------------------------------ | |
28ef6c31 JA |
7868 | This document details the changes between this version, bash-2.05-release, |
7869 | and the previous version, bash-2.05-beta2. | |
7870 | ||
7871 | 1. Changes to Bash | |
7872 | ||
7873 | a. Make sure we note that the first line of a multi-line command was not | |
7874 | saved in the history if the tests for HISTCONTROL succeed, but the | |
7875 | HISTIGNORE check fails. | |
7876 | ||
7877 | b. Fixed a bug in the pattern matching code that caused `[' to be treated | |
7878 | as a special character inside a `[...]' bracket expression. | |
7879 | ||
7880 | c. Fixed a bug in the pattern matching code that caused `]' to terminate | |
7881 | a bracket expression even if it was the first character after the `[' | |
7882 | (or a leading `!' or `^'). | |
7883 | ||
7884 | d. Made a small change to report a more user-friendly error message if | |
7885 | execve(2) fails because of an error with the interpreter in a script | |
7886 | with a leading `#! interpreter'. | |
7887 | ||
7888 | e. If the OS does not support an exec(2) magic number of `#!', make sure we | |
7889 | have a non-null interpreter name before attempting to execute it. | |
7890 | ||
7891 | f. Fixed a bug that caused the shell process to end up in a different | |
7892 | process group than the controlling terminal if a job-control shell was | |
7893 | run with `exec' in the startup files. | |
7894 | ||
7895 | g. When started in POSIX mode, either by `bash --posix', `bash -o posix', or | |
7896 | `sh', $SHELLOPTS includes `posix' and POSIXLY_CORRECT is set. | |
7897 | ||
7898 | h. Fixed a problem that caused the `\W' prompt string escape sequence to | |
7899 | expand to nothing when $PWD was `//'. | |
7900 | ||
7901 | i. The `bashbug' shell script no longer uses $(...) command substitution. | |
7902 | ||
7903 | j. When `set' is invoked without options in POSIX mode, it no longer prints | |
7904 | the names and definitions of shell functions. | |
7905 | ||
7906 | 2. Changes to Readline | |
7907 | ||
7908 | a. rl_set_paren_blink_timeout() is now documented. | |
7909 | ||
7910 | b. Corrected history.3 man page: `$' is not in the default value of | |
7911 | history_word_delimiters. | |
7912 | ||
7913 | c. If a hook function assigned to rl_event_hook sets rl_done to a non-zero | |
7914 | value, rl_read_key() now immediately returns '\n' (which is assumed to | |
7915 | be bound to accept-line). | |
7916 | ||
7917 | 3. New Features in Bash | |
7918 | ||
7919 | a. The `>&word' redirection now works in POSIX mode as it does by default, | |
7920 | since POSIX.2 leaves it unspecified. | |
7921 | ||
7922 | ------------------------------------------------------------------------------ | |
7923 | This document details the changes between this version, bash-2.05-beta2, | |
7924 | and the previous version, bash-2.05-beta1. | |
7925 | ||
7926 | 1. Changes to Bash | |
7927 | ||
7928 | a. Fixed a bug in the arithmetic evaluation code so that a^=b is supported. | |
7929 | ||
7930 | b. Fixed startup so posixly_correct is retained across subshells begun to | |
7931 | execute scripts without a leading `#!'. | |
7932 | ||
7933 | c. Fixed a bug that caused $(< file) to not work in a (...) subshell. | |
7934 | ||
7935 | d. Added config support for Linux running on the IBM S390. | |
7936 | ||
7937 | e. Fixed a bug that caused bash to get its input pointer out of sync when | |
7938 | reading commands through a pipe and running a command with standard | |
7939 | input redirected from a file. | |
7940 | ||
7941 | f. Made a change so that command completion now makes about half as many | |
7942 | stat(2) calls when searching the $PATH. | |
7943 | ||
7944 | g. Fixed a bug that caused variable assignments preceding `return' to not | |
7945 | be propagated to the shell environment in POSIX mode. | |
7946 | ||
7947 | h. Fixed a bug with ${parameter[:]?word} -- tilde expansion was not performed | |
7948 | on `word'. | |
7949 | ||
7950 | i. In POSIX mode, `break' and `continue' do not complain and return success | |
7951 | if called when the shell is not executing a loop. | |
7952 | ||
7953 | j. Fixed `bash -o posix' to work the same as `bash --posix'. | |
7954 | ||
7955 | k. Fixed a bug where variable assignments preceding `eval' or `source/.' | |
7956 | would not show up in the environment exported to subshells run by the | |
7957 | commands. | |
7958 | ||
7959 | l. In POSIX mode, shells started to execute command substitutions inherit | |
7960 | the value of the `-e' option from their parent shell. | |
7961 | ||
7962 | m. In POSIX mode, aliases are expanded even in non-interactive shells. | |
7963 | ||
7964 | n. Changed some of the job control messages to display the text required by | |
7965 | POSIX.2 when the shell is in POSIX mode. | |
7966 | ||
7967 | o. Fixed a bug in `test' that caused it to occasionally return incorrect | |
7968 | results when non-numeric arguments were supplied to `-t'. | |
7969 | ||
7970 | 2. Changes to Readline | |
7971 | ||
7972 | a. Some changes were made to avoid gcc warnings with -Wall. | |
7973 | ||
7974 | b. rl_get_keymap_by_name now finds keymaps case-insensitively, so | |
7975 | `set keymap EMACS' works. | |
7976 | ||
7977 | c. The history file writing and truncation functions now return a useful | |
7978 | status on error. | |
7979 | ||
7980 | d. Fixed a bug that could cause applications to dereference a NULL pointer | |
7981 | if a NULL second argument was passed to history_expand(). | |
7982 | ||
7983 | 3. New Features in Bash | |
7984 | ||
7985 | a. doc/readline.3 has been moved to the readline distribution. | |
7986 | ||
7987 | 4. New Features in Readline | |
7988 | ||
7989 | a. New function, rl_get_screen_size (int *rows, int *columns), returns | |
7990 | readline's idea of the screen dimensions. | |
7991 | ||
7992 | b. The timeout in rl_gather_tyi (readline keyboard input polling function) | |
7993 | is now settable via a function (rl_set_keyboard_input_timeout()). | |
7994 | ||
7995 | c. Renamed the max_input_history variable to history_max_entries; the old | |
7996 | variable is maintained for backwards compatibility. | |
7997 | ||
7998 | d. The list of characters that separate words for the history tokenizer is | |
7999 | now settable with a variable: history_word_delimiters. The default | |
8000 | value is as before. | |
8001 | ||
8002 | ------------------------------------------------------------------------------ | |
8003 | This document details the changes between this version, bash-2.05-beta1, | |
8004 | and the previous version, bash-2.05-alpha1. | |
8005 | ||
8006 | 1. Changes to Bash | |
8007 | ||
8008 | a. Changes to allow shared library and object building on the GNU Hurd. | |
8009 | ||
8010 | b. Fixes to the way exported functions are placed into the environment and | |
8011 | cached. | |
8012 | ||
8013 | c. The globbing library once again respects locales when processing ranges | |
8014 | in bracket expressions while doing pattern matching. | |
8015 | ||
8016 | d. System-specific configuration changes for: Tru 64, Interix | |
8017 | ||
8018 | e. Bashbug now uses /usr/bin/editor as one of the editing alternatives, and | |
8019 | will use mktemp(1) or tempfile(1), if present, for temporary file creation. | |
8020 | ||
8021 | f. Bash no longer performs a binary file check on a script argument that's | |
8022 | really a tty (like /dev/fd/0 or /dev/stdin). | |
8023 | ||
8024 | g. Fixed a bug in the execution of shell scripts that caused the effects of | |
8025 | $BASH_ENV to be undone in some cases. | |
8026 | ||
8027 | h. Fixed several bugs that made `bash [-i] /dev/stdin' not work correctly. | |
8028 | ||
8029 | i. Several changes to the job control code to avoid some signal state | |
8030 | manipulation. | |
8031 | ||
8032 | j. The Bash malloc no longer blocks signals as often, which should make it | |
8033 | faster. | |
8034 | ||
8035 | k. Fixed a parsing bug that did not allow backslash to escape a single quote | |
8036 | inside a $'...' construct. | |
8037 | ||
8038 | l. Fixed a bug that caused things like ${var:=$'value'} to be parsed | |
8039 | incorrectly. This showed up in newer versions of autoconf. | |
8040 | ||
8041 | m. Fixed a bug in the bash-specific readline initialization that caused | |
8042 | key bindings to bash-specific function names appearing in .inputrc to | |
8043 | not be honored. | |
8044 | ||
8045 | n. Bash now sets the file descriptor it uses to save the file descriptor | |
8046 | opened on a shell script to close on exec. | |
8047 | ||
8048 | o. Fixed a bug in the prompt string decoding that caused it to misbehave | |
8049 | when presented an octal sequence of fewer than three characters. | |
8050 | ||
8051 | p. Fixed the `test' builtin to return an error if `[' is supplied a single | |
8052 | argument that is not `]'. | |
8053 | ||
8054 | q. Fixed a bug that caused subshells started to run executable shell scripts | |
8055 | without a leading `#!' to incorrectly inherit an argument list preceding | |
8056 | a shell builtin (like such a script called from a script sourced with `.', | |
8057 | where there were variable assignments preceding the `.' command) | |
8058 | ||
8059 | r. Fixed a bug that caused changes to variables supplied in an assignment | |
8060 | statement preceding a shell builtin to not be honored (like a script | |
8061 | run with `.'). | |
8062 | ||
8063 | s. HOSTTYPE, OSTYPE, and MACHTYPE are set only if they do not have values | |
8064 | when the shell is started. | |
8065 | ||
8066 | t. Fixed a bug that caused SIGINT to kill shell scripts after the script | |
8067 | called `wait'. | |
8068 | ||
8069 | u. The `fc' builtin now tries to create its temporary files in the directory | |
8070 | named by $TMPDIR. | |
8071 | ||
8072 | v. Bash no longer calls any Readline functions or uses any Readline variables | |
8073 | not declared in readline.h. | |
8074 | ||
8075 | w. Fixed a bug that caused some substitutions involving $@ to not be split | |
8076 | correctly, especially expansions of the form ${paramterOPword}. | |
8077 | ||
8078 | x. SSH2_CLIENT is now treated like SSH_CLIENT and not auto-exported if it | |
8079 | appears in the initial environment. | |
8080 | ||
8081 | y. Fixed a couple of problems with shell scripts without a leading `#!' | |
8082 | being executed out of shell functions that could cause core dumps if | |
8083 | such a script attempted to execute `return'. | |
8084 | ||
8085 | z. Fixed a problem with the `-nt' and `-ot' binary operators for the | |
8086 | `test/[' builtin and the `[[' conditional command that caused wrong | |
8087 | return values if one of the file arguments did not exist. | |
8088 | ||
8089 | aa. Fixed a bug that caused non-interactive shells which had previously | |
8090 | executed `shopt -s expand_aliases' to fail to expand aliases in a | |
8091 | command like `(command) &'. | |
8092 | ||
8093 | 2. Changes to Readline | |
8094 | ||
8095 | a. Changes to make most (but not yet all -- there is still crlf()) of the | |
8096 | exported readline functions declared in readline.h have an rl_ prefix. | |
8097 | ||
8098 | b. More `const' changes in function arguments, mostly for completion | |
8099 | functions. | |
8100 | ||
8101 | c. Fixed a bug in rl_forward that could cause the point to be set to before | |
8102 | the beginning of the line in vi mode. | |
8103 | ||
8104 | d. Fixed a bug in the callback read-char interface to make it work when a | |
8105 | readline function pushes some input onto the input stream with | |
8106 | rl_execute_next (like the incremental search functions). | |
8107 | ||
8108 | e. Fixed a file descriptor leak in the history file manipulation code that | |
8109 | was tripped when attempting to truncate a non-regular file (like | |
8110 | /dev/null). | |
8111 | ||
8112 | f. Some existing variables are now documented and part of the public | |
8113 | interface (declared in readline.h): rl_explict_arg, rl_numeric_arg, | |
8114 | rl_editing_mode, rl_last_func. | |
8115 | ||
8116 | g. Renamed rltty_set_default_bindings to rl_tty_set_default_bindings and | |
8117 | crlf to rl_crlf, so there are no public functions declared in readline.h | |
8118 | without an `rl_' prefix. The old functions still exist for backwards | |
8119 | compatibility. | |
8120 | ||
8121 | 3. New Features in Bash | |
8122 | ||
8123 | a. A new loadable builtin, realpath, which canonicalizes and expands symlinks | |
8124 | in pathname arguments. | |
8125 | ||
8868edaf | 8126 | b. When `set' is called without options, it prints function definitions in a |
28ef6c31 JA |
8127 | way that allows them to be reused as input. This affects `declare' and |
8128 | `declare -p' as well. | |
8129 | ||
8130 | 4. New Features in Readline | |
8131 | ||
8132 | a. New application-callable function rl_set_prompt(const char *prompt): | |
8133 | expands its prompt string argument and sets rl_prompt to the result. | |
8134 | ||
8135 | b. New application-callable function rl_set_screen_size(int rows, int cols): | |
8136 | public method for applications to set readline's idea of the screen | |
8137 | dimensions. | |
8138 | ||
8139 | c. The history example program (examples/histexamp.c) is now built as one | |
8140 | of the examples. | |
8141 | ||
8142 | ------------------------------------------------------------------------------ | |
8143 | This document details the changes between this version, bash-2.05-alpha1, | |
8144 | and the previous version, bash-2.04-release. | |
8145 | ||
8146 | 1. Changes to Bash | |
8147 | ||
8148 | a. A fix was made to allow newlines in compond array assignments. | |
8149 | ||
8150 | b. configure now checks for real-time signals with unusable values. | |
8151 | ||
8152 | c. Interactive shells no longer exit if a substitution fails because of an | |
8153 | unset variable within a sourced file. | |
8154 | ||
8155 | d. Fixed a problem with incorrect matching of extended glob patterns when | |
8156 | doing pattern substitution. | |
8157 | ||
8158 | e. `{' is now quoted by the completion code when it appears in a filename. | |
8159 | ||
8160 | f. Fixed an error in pattern matching that caused the matcher to not | |
8161 | correctly skip the rest of a bracket expression after a character | |
8162 | matched. | |
8163 | ||
8164 | g. Fixed a bug in the IFS word splitting code to make a non-whitespace IFS | |
8165 | character preceded by IFS whitespace part of the current delimiter rather | |
8166 | than generating a separate field. | |
8167 | ||
8168 | h. The {!prefix@} expansion now generates separate words, analogous to $@, | |
8169 | when double-quoted. | |
8170 | ||
8171 | i. Command substitution now ignores NUL bytes in the command output, and the | |
8172 | parser ignores them on input. | |
8173 | ||
8174 | j. A fix was made to the job control code to prevent hanging processes when | |
8175 | the shell thinks background processes are running but the kernel returns | |
8176 | -1/ECHILD from waitpid(). | |
8177 | ||
8178 | k. `pwd' now prints an error message if the write fails when displaying the | |
8179 | current directory. | |
8180 | ||
8181 | l. When in POSIX mode, the shell prints trap dispostions without a leading | |
8182 | `SIG' in the signal specification. | |
8183 | ||
8184 | m. Fixed a parser bug that caused the current command's line count to be | |
8185 | messed up by a compound array assignment. | |
8186 | ||
8187 | n. Fixed a bug in the unwind-protect code that caused bad behavior on machines | |
8188 | where ints and pointers are not the same size. | |
8189 | ||
8190 | o. System-specific configure changes for: MacOS X. | |
8191 | ||
8192 | p. Changes for Cygwin to translate \r\n and \r to \n and to set file | |
8193 | descriptors used for reading input to text mode in various places. | |
8194 | ||
8195 | q. Fixed a bug that caused `!' to occasionally not be honored when in | |
8196 | a (...) subshell. | |
8197 | ||
8198 | r. Bash no longer assumes that getcwd() will return any useful error message | |
8199 | in the buffer passed as an argument if the call fails. | |
8200 | ||
8201 | s. The `source', `.', and `fc' builtins no longer check whether a file is | |
8202 | binary before reading commands from it. | |
8203 | ||
8204 | t. Subshells no longer turn off job control when they exit, since that | |
8205 | sometimes resulted in the terminal being reset to the wrong process | |
8206 | group. | |
8207 | ||
8208 | u. The history code no longer tries to save the second and subsequent lines | |
8209 | of a multi-line command if the first line was not saved. | |
8210 | ||
8211 | v. The history saving code now does a better job of saving blank lines in a | |
8212 | multi-line command. | |
8213 | ||
8214 | w. Removed a `feature' that made `ulimit' silently translate `unlimited' to | |
8215 | the current hard limit, which obscured some kernel error returns. | |
8216 | ||
8217 | x. Fixed the grammar so that `}' is recognized as a reserved word after | |
8218 | another reserved word, rather than requiring a `;' or newline. This | |
8219 | means that constructs like | |
8220 | ||
8221 | { { echo a b c ; } } | |
8222 | ||
8223 | work as expected. | |
8224 | ||
8225 | y. Conditional commands ([[...]]) now perform tilde expansion on their | |
8226 | arguments. | |
8227 | ||
8228 | z. Noted in the documentation that `set -a' will cause functions to be | |
8229 | exported if they are defined after `set -a' is executed. | |
8230 | ||
8231 | aa. When an interactive login shell starts, if $PWD and $HOME refer to the | |
8232 | same directory but are not the same string, $PWD is set to $HOME. | |
8233 | ||
8234 | bb. Fixed `printf' to handle invalid floating point numbers better. | |
8235 | ||
8236 | cc. Temporary files are now created with random filenames, to improve security. | |
8237 | ||
8238 | dd. The readline initialization code now binds the custom bash functions and | |
8239 | key bindings after the readline defaults are set up. | |
8240 | ||
8241 | ee. Fixed the `source' builtin to no longer overwrite a shell function's | |
8242 | argument list, even if the sourced file changes the positional parameters. | |
8243 | ||
8244 | ff. A bug fix was made in the expansion of `$*' in contexts where it should | |
8245 | not be split, like assignment statements. | |
8246 | ||
8247 | gg. Fixed a bug in the parameter substring expansion to handle conditional | |
8248 | arithmetic expressions ( exp ? val1 : val2 ) without cutting the expression | |
8249 | off at the wrong `:'. | |
8250 | ||
8251 | hh. The `<>' redirection is no longer subject to the current setting of | |
8252 | `noclobber', as POSIX.2 specifies. | |
8253 | ||
8254 | ii. Fixed a bug in the conditional command parsing code that caused expressions | |
8255 | in parentheses to occasionally be parsed incorrectly. | |
8256 | ||
8257 | jj. Fixed a bug in the ((...)) arithmetic command to allow do...done or | |
8258 | {...} to follow the )) without an intervening list terminator. | |
8259 | ||
8260 | kk. `printf' now treats `\E' the same as `\e' when performing backslash escape | |
8261 | expansion for the `%b' format specifier. | |
8262 | ||
8263 | ll. When in POSIX mode, the shell no longer searches the current directory for | |
8264 | a file to be sourced with `.' or `source' if `.' is not in $PATH. | |
8265 | ||
8266 | mm. Interactive comments are no longer turned off when POSIX mode is disabled. | |
8267 | ||
8268 | nn. The UID, EUID, HOSTNAME variables are not set if they are in the shell's | |
8269 | environment when it starts up. | |
8270 | ||
8271 | oo. Fixed a bug in the `command' builtin so the effect of a command like | |
8272 | `command exec 4<file' is as if the `command' had been omitted. | |
8273 | ||
8274 | pp. ${foo[@]} and ${foo[*]} now work as in ksh93 if `foo' is not an array | |
8275 | variable. | |
8276 | ||
8277 | qq. ${#foo[X]}, where X is 0, @, or *, now work as in ksh93 if `foo' is not | |
8278 | an array variable. | |
8279 | ||
8280 | rr. The shell's idea of an absolute pathname now takes into account a | |
8281 | possible drive specification on Cygwin and other Windows systems. | |
8282 | ||
8283 | ss. Fixed a bug which caused incorrect parsing of some multi-character | |
8284 | constructs if they were split across input lines with backslash-newline | |
8285 | line continuation. | |
8286 | ||
8287 | tt. Fixed a bug that caused restricted shell mode to be set inappropriately | |
8288 | when trying to execute a shell script without a leading `#!'. | |
8289 | ||
8290 | uu. Shell function definitions no longer require that the body be a group | |
8291 | command ( {...} ), as POSIX.2 requires. | |
8292 | ||
8293 | vv. The `cd' and `pwd' builtins now process symlinks in pathnames internally | |
8294 | and should require many fewer calls to getcwd(). | |
8295 | ||
8296 | ww. Fixed a bug that caused a pipeline's process group to be set incorrectly | |
8297 | if one of the pipeline elements contained a command substitution. | |
8298 | ||
8299 | xx. Fixed a bug that caused core dumps when expanding the value of HISTIGNORE. | |
8300 | ||
8301 | yy. The output of `set' is now quoted using $'...' so invisible characters are | |
8302 | displayed as escape sequences. | |
8303 | ||
8304 | zz. Fixed the help text for `unset', since PATH and IFS may both be unset. | |
8305 | ||
8306 | aaa. The shell no longer puts directory names into the command hash table. | |
8307 | ||
8308 | bbb. Fixed a bug in `read' that caused it to occasionally free memory twice if | |
8309 | it was interrupted after reading a large amount of data. | |
8310 | ||
8311 | ccc. Assignment statements that attempt to assign values to readonly variables | |
8312 | now cause the command to return an error status. | |
8313 | ||
8314 | ddd. Fixed a bug that could cause incorrect output if a $(<file) construct was | |
8315 | interrupted. | |
8316 | ||
8317 | eee. GROUPS and FUNCNAME now return an error status when assignment is | |
8318 | attempted, but may be unset (in which case they lose their special | |
8319 | properties). In all respects except unsetting, they are readonly. | |
8320 | ||
8321 | fff. The string-to-integer conversion code now ignores trailing whitespace in | |
8322 | the string, even if strtol(3) does not. | |
8323 | ||
8324 | ggg. The tcsh magic-space function now does a better job of inserting the | |
8325 | space close to where the point was before the history expansion, rather | |
8326 | than just appending it. | |
8327 | ||
8328 | hhh. Fixed a bug which caused a file sourced from an interactive shell to | |
8329 | fill up the jobs table if it ran lots of jobs. | |
8330 | ||
8331 | iii. Fixed a bug in the parameter pattern substitution code to avoid infinite | |
8332 | recursion on zero-length matches. | |
8333 | ||
8334 | 2. Changes to Readline | |
8335 | ||
8336 | a. When setting the terminal attributes on systems using `struct termio', | |
8337 | readline waits for output to drain before changing the attributes. | |
8338 | ||
8339 | b. A fix was made to the history word tokenization code to avoid attempts to | |
8340 | dereference a null pointer. | |
8341 | ||
8342 | c. Readline now defaults rl_terminal_name to $TERM if the calling application | |
8343 | has left it unset, and tries to initialize with the resultant value. | |
8344 | ||
8345 | d. Instead of calling (*rl_getc_function)() directly to get input in certain | |
8346 | places, readline now calls rl_read_key() consistently. | |
8347 | ||
8348 | e. Fixed a bug in the completion code that allowed a backslash to quote a | |
8349 | single quote inside a single-quoted string. | |
8350 | ||
8351 | f. rl_prompt is no longer assigned directly from the argument to readline(), | |
8352 | but uses memory allocated by readline. This allows constant strings to | |
8353 | be passed to readline without problems arising when the prompt processing | |
8354 | code wants to modify the string. | |
8355 | ||
8356 | g. Fixed a bug that caused non-interactive history searches to return the | |
8357 | wrong line when performing multiple searches backward for the same string. | |
8358 | ||
8359 | h. Many variables, function arguments, and function return values are now | |
8360 | declared `const' where appropriate, to improve behavior when linking with | |
8361 | C++ code. | |
8362 | ||
8363 | i. The control character detection code now works better on systems where | |
8364 | `char' is unsigned by default. | |
8365 | ||
8366 | j. The vi-mode numeric argument is now capped at 999999, just like emacs mode. | |
8367 | ||
8368 | k. The Function, CPFunction, CPPFunction, and VFunction typedefs have been | |
8369 | replaced with a set of specific prototyped typedefs, though they are | |
8370 | still in the readline header files for backwards compatibility. | |
8371 | ||
8372 | m. Nearly all of the (undocumented) internal global variables in the library | |
8373 | now have an _rl_ prefix -- there were a number that did not, like | |
8374 | screenheight, screenwidth, alphabetic, etc. | |
8375 | ||
8376 | n. The ding() convenience function has been renamed to rl_ding(), though the | |
8377 | old function is still defined for backwards compatibility. | |
8378 | ||
8379 | o. The completion convenience functions filename_completion_function, | |
8380 | username_completion_function, and completion_matches now have an rl_ | |
8381 | prefix, though the old names are still defined for backwards compatibility. | |
8382 | ||
8383 | p. The functions shared by readline and bash (linkage is satisfied from bash | |
8384 | when compiling with bash, and internally otherwise) now have an sh_ prefix. | |
8385 | ||
8386 | q. Changed the shared library creation procedure on Linux and BSD/OS 4.x so | |
8387 | that the `soname' contains only the major version number rather than the | |
8388 | major and minor numbers. | |
8389 | ||
8390 | r. Fixed a redisplay bug that occurred when the prompt spanned more than one | |
8391 | physical line and contained invisible characters. | |
8392 | ||
8393 | 3. New Features in Bash | |
8394 | ||
8395 | a. Added a new `--init-file' invocation argument as a synonym for `--rcfile', | |
8396 | per the new GNU coding standards. | |
8397 | ||
8398 | b. The /dev/tcp and /dev/udp redirections now accept service names as well as | |
8399 | port numbers. | |
8400 | ||
8401 | c. `complete' and `compgen' now take a `-o value' option, which controls some | |
8402 | of the aspects of that compspec. Valid values are: | |
8403 | ||
8404 | default - perform bash default completion if programmable | |
8405 | completion produces no matches | |
8406 | dirnames - perform directory name completion if programmable | |
8407 | completion produces no matches | |
8408 | filenames - tell readline that the compspec produces filenames, | |
8409 | so it can do things like append slashes to | |
8410 | directory names and suppress trailing spaces | |
8411 | ||
8412 | 4. New Features in Readline | |
8413 | ||
8414 | a. The blink timeout for paren matching is now settable by applications. | |
8415 | ||
8416 | b. _rl_executing_macro has been renamed to rl_executing_macro, which means | |
8417 | it's now part of the public interface. | |
8418 | ||
8419 | c. Readline has a new variable, rl_readline_state, which is a bitmap that | |
8420 | encapsulates the current state of the library; intended for use by | |
8421 | callbacks and hook functions. | |
8422 | ||
8423 | ------------------------------------------------------------------------------ | |
bb70624e JA |
8424 | This document details the changes between this version, bash-2.04-release, |
8425 | and the previous version, bash-2.04-beta5. | |
8426 | ||
8427 | 1. Changes to Bash | |
8428 | ||
8429 | a. Better compile-time and configure-time checks for the necessity of | |
8430 | inet_aton(). | |
8431 | ||
8432 | b. A bug was fixed in the expansion of "${@:-}" when there are positional | |
8433 | parameters. | |
8434 | ||
8435 | c. A typo was fixed in the output of `complete'. | |
8436 | ||
8437 | d. The matches generated for a word by the `-W' argument to complete and | |
8438 | compgen are now matched against the word being completed, and only | |
8439 | matches are returned as the result. | |
8440 | ||
8441 | e. Some fixes were made for systems which do not restart read(2) when a | |
8442 | signal caught by bash is received. | |
8443 | ||
8444 | f. A bug was fixed which caused the umask to be set to 0 when an invalid | |
8445 | symbolic mode mask was parsed. | |
8446 | ||
8447 | g. Fixed a bug that could cause a core dump if a SIGCHLD was received while | |
8448 | performing an assignment statement using command substitution. | |
8449 | ||
8450 | h. Changed the word splitting function for programmable completion so cases | |
8451 | in which the cursor is between words are handled a bit better. | |
8452 | ||
8453 | 2. Changes to Readline | |
8454 | ||
8455 | a. rl_funmap_names() is now documented. | |
8456 | ||
8457 | 3. New Features in Bash | |
8458 | ||
8459 | a. The LC_NUMERIC variable is now treated specially, and used to set the | |
8460 | LC_NUMERIC locale category for number formatting, e.g., when `printf' | |
8461 | displays floating-point numbers. | |
8462 | ||
8463 | ------------------------------------------------------------------------------ | |
8464 | This document details the changes between this version, bash-2.04-beta5, | |
8465 | and the previous version, bash-2.04-beta4. | |
8466 | ||
8467 | 1. Changes to Bash | |
8468 | ||
8469 | a. A couple of changes were made to the Makefiles for easier building on | |
8470 | non-Unix systems. | |
8471 | ||
8472 | b. Fixed a bug where the current prompt would be set to $PS2 at startup. | |
8473 | ||
8474 | c. The shell script that tests an already-installed version was changed to | |
8475 | remove the directory it created its test programs in at exit. | |
8476 | ||
8477 | d. Several changes were made to the code that tokenizes an input line for | |
8478 | the programmable completion code. Shell metacharacters will now appear | |
8479 | as individual words in the word list passed to the completion functions. | |
8480 | Some of the example completion shell functions were changed to understand | |
8481 | redirection operators. | |
8482 | ||
8483 | e. A bug was fixed that, under obscure circumstances, could confuse the | |
8484 | parser when a shell function was run by the programmable completion code. | |
8485 | ||
8486 | f. A bug was fixed in the ulimit builtin for systems not using getrlimit(). | |
8487 | ||
8488 | g. The execution code now propagates the correct exit status back to the rest | |
8489 | of the code if the return value of a subshell command was being inverted. | |
8490 | Some new test cases for inverting return values with the `!' reserved | |
8491 | word have been added. | |
8492 | ||
8493 | h. Negative exponents in the arithmetic evaluation of v**e now return an | |
8494 | evaluation error. | |
8495 | ||
8496 | i. A bug that caused bash to check the wrong process in a pipeline for | |
8497 | abnormal termination (and consequently resetting the terminal attributes) | |
8498 | was fixed. | |
8499 | ||
8500 | j. Fixed a bug that caused $PS2 to be displayed after PROMPT_COMMAND was | |
8501 | executed. | |
8502 | ||
8503 | 2. Changes to Readline | |
8504 | ||
8505 | 1. Fixed a bug in a C preprocessor define that caused the keypad control | |
8506 | functions to be compiled out for all platforms except DJGPP. | |
8507 | ||
8508 | ------------------------------------------------------------------------------ | |
8509 | This document details the changes between this version, bash-2.04-beta4, | |
8510 | and the previous version, bash-2.04-beta3. | |
8511 | ||
8512 | 1. Changes to Bash | |
8513 | ||
8514 | a. A couple of changes were made to the redirection to attempt to avoid | |
8515 | race conditions and malicious file replacement. | |
8516 | ||
8517 | 2. A change was made to the string evaluation code (used for command | |
8518 | substitution, `eval', and the `.' builtin) to fix an obscure core | |
8519 | dump on alpha machines. | |
8520 | ||
8521 | 3. A bug that caused $LINENO to be wrong when executing arithmetic for | |
8522 | commands was fixed. | |
8523 | ||
8524 | 4. A couple of memory leaks in the programmable completion code were fixed. | |
8525 | ||
8526 | 5. A bug that could cause a core dump by freeing memory twice during a call | |
8527 | to `eval' if `set -u' had been enabled and an undefined variable was | |
8528 | referenced was fixed. | |
8529 | ||
8530 | ------------------------------------------------------------------------------ | |
8531 | This document details the changes between this version, bash-2.04-beta3, | |
8532 | and the previous version, bash-2.04-beta2. | |
8533 | ||
8534 | 1. Changes to Bash | |
8535 | ||
8536 | a. Bash should run the appropriate startup files when invoked by ssh2. | |
8537 | ||
8538 | b. Fixed a bug in the parsing of conditional commands that could cause a | |
8539 | core dump. | |
8540 | ||
8541 | c. Fixed a bug in parsing job specifications that occasionally caused | |
8542 | core dumps when an out-of-range job was referenced. | |
8543 | ||
8544 | d. Fixed the `type' and `command' builtins to do better reporting of | |
8545 | commands that are not found in $PATH or the hash table. | |
8546 | ||
8547 | e. Fixed a POSIX.2 compliance problem in the command builtin -- commands | |
8548 | are supposed to be reported as full pathnames. | |
8549 | ||
8550 | f. The `echo' builtin now returns failure if a write error occurs. | |
8551 | ||
8552 | g. Fixed a bug which caused the locale to not be reset correctly when | |
8553 | LC_ALL was unset. | |
8554 | ||
8555 | h. Changed description of `getopts' in man page and reference manual to make | |
8556 | it clear that option characters may be characters other than letters. | |
8557 | ||
8558 | i. If the shell exits while in a function, make sure that any trap on EXIT | |
8559 | doesn't think the function is still executing. | |
8560 | ||
8561 | j. Bashbug now tries harder to find a usable editor if $EDITOR is not set, | |
8562 | rather than simply defaulting to `emacs'. | |
8563 | ||
8564 | k. Changes to the scripts that guess and canonicalize the system type, from | |
8565 | the latest `automake' distribution via Debian. | |
8566 | ||
8567 | l. When using named pipes for process substitution, make sure the file | |
8568 | descriptors opened for reading are set to non-blocking mode. | |
8569 | ||
8570 | m. Fixed a bug that caused termination of pipelines that are killed by a | |
8571 | signal to not be reported in some cases. | |
8572 | ||
8573 | n. When not in literal-history mode, shell comment lines are not added to | |
8574 | the history list. | |
8575 | ||
8576 | o. When running in POSIX.2 mode, bash no longer performs word splitting on | |
8577 | the expanded value of the word supplied as the filename argument to | |
8578 | redirection operators. | |
8579 | ||
8580 | p. The prompt string decoding code now backslash-quotes only characters that | |
8581 | are special within double quotes when expanding the \w and \W escape | |
8582 | sequences. | |
8583 | ||
8584 | q. Fixed a bug in the prompt decoding code that could cause a non-interactive | |
8585 | shell to seg fault if `\u' was used in PS4 and the shell was in xtrace | |
8586 | mode. | |
8587 | ||
8588 | r. Fixed a bug that caused function definitions to be printed with any | |
8589 | redirections that should be attached to the entire function before the | |
8590 | closing brace. | |
8591 | ||
8592 | s. Changed the tilde expansion code for Cygwin systems to avoid creating | |
8593 | pathnames beginning with `//' if $HOME == `/'. | |
8594 | ||
8595 | t. Fixed a couple of autoconf tests to avoid creating files with fixed names | |
8596 | in /tmp. | |
8597 | ||
8598 | u. The `trap' and `kill' builtins now know the names of the POSIX.1b real- | |
8599 | time signals on systems which support them. | |
8600 | ||
8601 | 2. Changes to Readline | |
8602 | ||
8603 | a. Fixed a problem with the single-quote quoting function that could cause | |
8604 | buffer overflows. | |
8605 | ||
8606 | b. Fixed a bug that caused incorrect `stat characters' to be printed if | |
8607 | the files being completed were in the root directory and visible-stats | |
8608 | was enabled. | |
8609 | ||
8610 | 3. New Features in Bash | |
8611 | ||
8612 | a. There is a new `rbash.1' manual page, from the Debian release. | |
8613 | ||
8614 | b. The `--enable-usg-echo-default' option to `configure' has been renamed to | |
8615 | `--enable-xpg-echo-default'. The old option is still there for backwards | |
8616 | compatibility. | |
8617 | ||
8618 | ------------------------------------------------------------------------------ | |
8619 | This document details the changes between this version, bash-2.04-beta2, | |
8620 | and the previous version, bash-2.04-beta1. | |
8621 | ||
8622 | 1. Changes to Bash | |
8623 | ||
8624 | a. Fixed a bug that could cause pipes to be closed inappropriately in | |
8625 | some obscure cases. | |
8626 | ||
8627 | b. Fixed a bug that caused creation of the exported environment to clobber | |
8628 | the current command string if there were any exported shell functions. | |
8629 | ||
8630 | c. Some changes were made to reduce bash's memory usage. | |
8631 | ||
8632 | d. Fixed a problem with programmable completion and filenames to be | |
8633 | completed containing quote characters. | |
8634 | ||
8635 | e. Changed the code the removes named pipes created for the <(...) and >(...) | |
8636 | expansions to defer removal until after any current shell function has | |
8637 | finished executing. | |
8638 | ||
8639 | f. Fixed a bug in `select' which caused it to not handle the `continue' | |
8640 | builtin correctly. | |
8641 | ||
8642 | g. Autoconf tests added for cygwin32 and mingw32. | |
8643 | ||
8644 | 2. New Features in Bash | |
8645 | ||
8646 | a. The `--with-bash-malloc' configure option replaces `--with-gnu-malloc' | |
8647 | (which is still there for backwards compatibility). | |
8648 | ||
8649 | ------------------------------------------------------------------------------ | |
8650 | This document details the changes between this version, bash-2.04-beta1, | |
8651 | and the previous version, bash-2.04-alpha1. | |
8652 | ||
8653 | 1. Changes to Bash | |
8654 | ||
8655 | a. Fixed a bug in the programmable completion code that occurred when | |
8656 | trying to complete command lines containing a `;' or `@'. | |
8657 | ||
8658 | b. The file descriptor from which the shell is reading a script is now | |
8659 | moved to a file descriptor above the user-addressible range. | |
8660 | ||
8661 | c. Changes to `printf' so that it can handle integers beginning with 0 | |
8662 | or 0x as octal and hex, respectively. | |
8663 | ||
8664 | d. Fixes to the programmable completion code so it handles nonsense like | |
8665 | `compgen -C xyz' gracefully. | |
8666 | ||
8667 | e. The shell no longer modifies the signal handler for SIGPROF, allowing | |
8668 | profiling again on certain systems. | |
8669 | ||
8670 | f. The shell checks for a new window size, if the user has requested it, | |
8671 | after a process exits due to a signal. | |
8672 | ||
8673 | g. Fixed a bug with variables with null values in a program's temporary | |
8674 | environment and the bash getenv() replacement. | |
8675 | ||
8676 | h. `declare' and the other builtins that take variable assignments as | |
8677 | arguments now honor `set -a' and mark modified variables for export. | |
8678 | ||
8679 | i. Some changes were made for --dump-po-strings mode when writing strings | |
8680 | with embedded newlines. | |
8681 | ||
8682 | j. The code that caches export strings from the initial environment now | |
8683 | duplicates the string rather than just pointing into the environment. | |
8684 | ||
8685 | k. The filename completion quoting code now uses single quotes by default | |
8686 | if the filename being completed contains newlines, since \<newline> | |
8687 | has a special meaning to the parser. | |
8688 | ||
8689 | l. Bash now uses typedefs bits32_t and u_bits32_t instead of int32_t and | |
8690 | u_int32_t, respectively to avoid conflicts on certain Unix versions. | |
8691 | ||
8692 | m. Configuration changes were made for: Rhapsody, Mac OS, FreeBSD-3.x. | |
8693 | ||
8694 | n. Fixed a problem with hostname-to-ip-address translation in the | |
8695 | /dev/(tcp|udp)/hostname/port redirection code. | |
8696 | ||
8697 | o. The texinfo manual has been reorganized slightly. | |
8698 | ||
8699 | p. Filename generation (globbing) range comparisons in bracket expressions | |
8700 | no longer use strcoll(3) even if it is available, since it has unwanted | |
8701 | effects in certain locales. | |
8702 | ||
8703 | q. Fixed a cosmetic problem in the source that caused the shell to not | |
8704 | compile if DPAREN_ARITHMETIC was not defined but ARITH_FOR_COMMAND was. | |
8705 | ||
8706 | r. Fixed a bug in the here-document code tripped when the file descriptor | |
8707 | opened to the file containing the text of the here document was the | |
8708 | same as a redirector specified by the user. | |
8709 | ||
8710 | s. Fixed a bug where the INVERT_RETURN flag was not being set for `pipeline' | |
8711 | in `time ! pipeline'. | |
8712 | ||
8713 | t. Fixed a bug with the `wait' builtin which manifested itself when an | |
8714 | interrupt was received while the shell was waiting for asynchronous | |
8715 | processes in a shell script. | |
8716 | ||
8717 | u. Fixed the DEBUG trap code so that it has the correct value of $?. | |
8718 | ||
8719 | v. Fixed a bug in the parameter pattern substitution code that could cause | |
8720 | the shell to attempt to free unallocated memory if the pattern started | |
8721 | with `/' and an expansion error occurs. | |
8722 | ||
8723 | w. Fixed a bug in the positional parameter substring code that could | |
8724 | cause the shell to loop freeing freed memory. | |
8725 | ||
8726 | x. Fixed a bug in the positional parameter pattern substitution code so | |
8727 | that it correctly handles null replacement strings with a pattern | |
8728 | string prefixed with `%' or `#'. | |
8729 | ||
8730 | y. The shell no longer attempts to import functions from the environment if | |
8731 | started with `-n'. | |
8732 | ||
8733 | z. Fixed a bug that caused `return' in a command substitution executed in | |
8734 | a shell function to return from the function in a subshell and continue | |
8735 | execution. | |
8736 | ||
8737 | aa. `hash -p /pathname/with/slashes name' is no longer allowed when the shell | |
8738 | is restricted. | |
8739 | ||
8740 | bb. The wait* job control functions now behave better if called when there | |
8741 | are no unwaited-for children. | |
8742 | ||
8743 | cc. Command substitution no longer unconditionally disables job control in | |
8744 | the subshell started to run the command. | |
8745 | ||
8746 | dd. A bug was fixed that occasionally caused traps to mess up the parser | |
8747 | state. | |
8748 | ||
8749 | ee. `bashbug' now honors user headers in the mail message it sends. | |
8750 | ||
8751 | ff. A bug was fixed that caused the `:p' history modifier to not print the | |
8752 | history expansion if the `histverify' option was set. | |
8753 | ||
8754 | 2. Changes to Readline | |
8755 | ||
8756 | a. Fixed a bug in the redisplay code for lines with more than 256 line | |
8757 | breaks. | |
8758 | ||
8759 | b. A bug was fixed which caused invisible character markers to not be | |
8760 | stripped from the prompt string if the terminal was in no-echo mode. | |
8761 | ||
8762 | c. Readline no longer tries to get the variables it needs for redisplay | |
8763 | from the termcap entry if the calling application has specified its | |
8764 | own redisplay function. Readline treats the terminal as `dumb' in | |
8765 | this case. | |
8766 | ||
8767 | d. Fixes to the SIGWINCH code so that a multiple-line prompt with escape | |
8768 | sequences is redrawn correctly. | |
8769 | ||
8770 | 3. New Features in Bash | |
8771 | ||
8772 | a. `bashbug' now accepts `--help' and `--version' options. | |
8773 | ||
8774 | b. There is a new `xpg_echo' option to `shopt' that controls the behavior | |
8775 | of echo with respect to backslash-escaped characters at runtime. | |
8776 | ||
8777 | ------------------------------------------------------------------------------ | |
8778 | This document details the changes between this version, bash-2.04-alpha1, | |
8779 | and the previous version, bash-2.04-devel. | |
8780 | ||
8781 | 1. Changes to Bash | |
8782 | ||
8783 | a. Fixed a bug that could cause core dumps when performing substring | |
8784 | expansion. | |
8785 | ||
8786 | b. Shared object configuration changes for: Solaris, OSF/1 | |
8787 | ||
8788 | c. The POSIX_GLOB_LIBRARY code that uses the POSIX.2 globbing facilities | |
8789 | for pathname expansion now understands GLOBIGNORE. | |
8790 | ||
8791 | d. The code that implements `eval' was changed to save the value of the | |
8792 | current prompt, so an eval in a shell function called by the programmable | |
8793 | completion code will not change the prompt to $PS2. | |
8794 | ||
8795 | e. Restored the undocumented NON_INTERACTIVE_LOGIN_SHELLS #define to | |
8796 | config-top.h. If this is defined, all login shells will read the | |
8797 | startup files, not just interactive and non-interactive started with | |
8798 | the `--login' option. | |
8799 | ||
8800 | f. Fixed a bug that caused the expansion code to occasionally dump core if | |
8801 | IFS contained characters > 128. | |
8802 | ||
8803 | g. Fixed a problem with the grammar so that a newline is not required | |
8804 | after the `))' in the new-style arithmetic for statement; a semicolon | |
8805 | may be used as expected. | |
8806 | ||
8807 | h. Variable indirection may now reference the shell's special variables. | |
8808 | ||
8809 | i. The $'...' and $"..." constructs are now added to the history correctly | |
8810 | if they contain newlines and command-oriented history is enabled. | |
8811 | ||
8812 | j. It is now an error to try to assign a value to a function-local copy | |
8813 | of a readonly shell variable (declared with the `local' builtin). | |
8814 | ||
8815 | 2. Changes to Readline | |
8816 | ||
8817 | a. The history file code now uses O_BINARY mode when reading and writing | |
8818 | the history file on cygwin32. | |
8819 | ||
8820 | 3. New Features in Bash | |
8821 | ||
8822 | a. A new programmable completion facility, with two new builtin commands: | |
8823 | complete and compgen. | |
8824 | ||
8825 | b. configure has a new option, `--enable-progcomp', to compile in the | |
8826 | programmable completion features (enabled by default). | |
8827 | ||
8828 | c. `shopt' has a new option, `progcomp', to enable and disable programmable | |
8829 | completion at runtime. | |
8830 | ||
8831 | d. Unsetting HOSTFILE now clears the list of hostnames used for completion. | |
8832 | ||
8833 | 4. New Features in Readline | |
8834 | ||
8835 | a. A new variable, rl_gnu_readline_p, always 1. The intent is that an | |
8836 | application can verify whether or not it is linked with the `real' | |
8837 | readline library or some substitute. | |
8838 | ||
8839 | ------------------------------------------------------------------------------ | |
8840 | This document details the changes between this version, bash-2.04-devel, | |
8841 | and the previous version, bash-2.03-release. | |
8842 | ||
8843 | 1. Changes to Bash | |
8844 | ||
8845 | a. System-specific configuration and source changes for: Interix, Rhapsody | |
8846 | ||
8847 | b. Fixed a bug in execute_cmd.c that resulted in a compile-time error if | |
8848 | JOB_CONTROL was not defined. | |
8849 | ||
8850 | c. An obscure race condition in the trap code was fixed. | |
8851 | ||
8852 | d. The string resulting from $'...' is now requoted to avoid any further | |
8853 | expansion. | |
8854 | ||
8855 | e. The $'...' quoting syntax now allows backslash to escape a single quote, | |
8856 | for ksh-93 compatibility. | |
8857 | ||
8858 | f. The $"..." quoting syntax now escapes backslashes and double quotes in | |
8859 | the translated string when displaying them with the --dump-po-strings | |
8860 | option. | |
8861 | ||
8862 | g. `echo -e' no longer converts \' to '. | |
8863 | ||
8864 | h. Fixes were made to the extended globbing code to handle embedded (...) | |
8865 | patterns better. | |
8866 | ||
8867 | i. Some improvements were made to the code that unsets `nodelay' mode on | |
8868 | the file descriptor from which bash is reading input. | |
8869 | ||
8870 | j. Some changes were made to the replacement termcap library for better | |
8871 | operation on MS-DOS. | |
8872 | ||
8873 | k. Some changes were made to the tilde expansion code to handle backslash | |
8874 | as a pathname separator on MS-DOS. | |
8875 | ||
8876 | l. The source has been reorganized a little bit -- there is now an `include' | |
8877 | subdirectory, and lib/posixheaders has been removed. | |
8878 | ||
8879 | m. Improvements were made to the `read' builtin so that it makes many | |
8880 | fewer read(2) system calls. | |
8881 | ||
8882 | n. The expansion of $- will include `c' and `s' when those options are | |
8883 | supplied at shell invocation. | |
8884 | ||
8868edaf | 8885 | o. Several improvements were made to the completion code: variable completion |
bb70624e JA |
8886 | now works better when there are unterminated expansions, command |
8887 | completion understands quotes better, and completion now works in certain | |
8888 | unclosed $(... constructs. | |
8889 | ||
8890 | p. The arithmetic expansion code was fixed to not need the value of a | |
8891 | variable being assigned a value (fixes the "ss=09; let ss=10" bug). | |
8892 | ||
8893 | q. Some changes were made to make exported environment creation faster. | |
8894 | ||
8895 | r. The html documentation will be installed into $(htmldir) if that variable | |
8896 | has a value when `make install' is run. | |
8897 | ||
8898 | s. Fixed a bug that would cause the bashrc file to be sourced inappropriately | |
8899 | when bash is started by sshd. | |
8900 | ||
8901 | t. The SSH_CLIENT environment variable is no longer auto-exported. | |
8902 | ||
8903 | u. A bug that caused redirections with (...) subshells to be performed in | |
8904 | the wrong order was fixed. | |
8905 | ||
28ef6c31 | 8906 | v. A bug that occasionally caused inappropriate expansion of assignment |
bb70624e JA |
8907 | statements in compound array assignments was fixed. |
8908 | ||
8909 | w. The code that parses the words in a compound array assignment was | |
8910 | simplified considerably and should work better now. | |
8911 | ||
8912 | x. Fixes to the non-job-control code in nojobs.c to make it POSIX.2-compliant | |
8913 | when a user attempts to retrieve the status of a terminated background | |
8914 | process. | |
8915 | ||
8916 | y. Fixes to the `printf' builtin so that it doesn't try to expand all | |
8917 | backslash escape sequences in the format string before parsing it for | |
8918 | % format specifiers. | |
8919 | ||
8920 | 2. Changes to Readline | |
8921 | ||
8922 | a. The history library tries to truncate the history file only if it is a | |
8923 | regular file. | |
8924 | ||
8925 | b. A bug that caused _rl_dispatch to address negative array indices on | |
8926 | systems with signed chars was fixed. | |
8927 | ||
8928 | c. rl-yank-nth-arg now leaves the history position the same as when it was | |
8929 | called. | |
8930 | ||
8931 | d. Changes to the completion code to handle MS-DOS drive-letter:pathname | |
8932 | filenames. | |
8933 | ||
8934 | e. Completion is now case-insensitive by default on MS-DOS. | |
8935 | ||
8936 | f. Fixes to the history file manipulation code for MS-DOS. | |
8937 | ||
8938 | g. Readline attempts to bind the arrow keys to appropriate defaults on MS-DOS. | |
8939 | ||
8940 | h. Some fixes were made to the redisplay code for better operation on MS-DOS. | |
8941 | ||
8942 | i. The quoted-insert code will now insert tty special chars like ^C. | |
8943 | ||
8944 | j. A bug was fixed that caused the display code to reference memory before | |
8945 | the start of the prompt string. | |
8946 | ||
8947 | k. More support for __EMX__ (OS/2). | |
8948 | ||
8949 | l. A bug was fixed in readline's signal handling that could cause infinite | |
8950 | recursion in signal handlers. | |
8951 | ||
8952 | m. A bug was fixed that caused the point to be less than zero when rl_forward | |
8953 | was given a very large numeric argument. | |
8954 | ||
8955 | n. The vi-mode code now gets characters via the application-settable value | |
8956 | of rl_getc_function rather than calling rl_getc directly. | |
8957 | ||
8958 | 3. New Features in Bash | |
8959 | ||
8960 | a. The history builtin has a `-d offset' option to delete the history entry | |
8961 | at position `offset'. | |
8962 | ||
8963 | b. The prompt expansion code has two new escape sequences: \j, the number of | |
8964 | active jobs; and \l, the basename of the shell's tty device name. | |
8965 | ||
8966 | c. The `bind' builtin has a new `-x' option to bind key sequences to shell | |
8967 | commands. | |
8968 | ||
8969 | d. There is a new shell option, no_empty_command_completion, which, when | |
8970 | enabled, disables command completion when TAB is typed on an empty line. | |
8971 | ||
8972 | e. The `help' builtin has a `-s' option to just print a builtin's usage | |
8868edaf | 8973 | synopsis. |
bb70624e JA |
8974 | |
8975 | f. There are several new arithmetic operators: id++, id-- (variable | |
8976 | post-increment/decrement), ++id, --id (variabl pre-increment/decrement), | |
8977 | expr1 , expr2 (comma operator). | |
8978 | ||
8979 | g. There is a new ksh-93 style arithmetic for command: | |
8980 | for ((expr1 ; expr2; expr3 )); do list; done | |
8981 | ||
8982 | h. The `read' builtin has a number of new options: | |
8983 | -t timeout only wait timeout seconds for input | |
8984 | -n nchars only read nchars from input instead of a full line | |
8985 | -d delim read until delim rather than newline | |
8986 | -s don't echo input chars as they are read | |
8987 | ||
8988 | i. The redirection code now handles several filenames specially: | |
8989 | /dev/fd/N, /dev/stdin, /dev/stdout, and /dev/stderr, whether or | |
8990 | not they are present in the file system. | |
8991 | ||
8992 | j. The redirection code now recognizes pathnames of the form | |
8993 | /dev/tcp/host/port and /dev/udp/host/port, and tries to open a socket | |
8994 | of the appropriate type to the specified port on the specified host. | |
8995 | ||
8996 | k. The ksh-93 ${!prefix*} expansion, which expands to the names of all | |
8997 | shell variables whose names start with prefix, has been implemented. | |
8998 | ||
8999 | l. There is a new dynamic variable, FUNCNAME, which expands to the name of | |
9000 | a currently-executing function. Assignments to FUNCNAME have no effect. | |
9001 | ||
9002 | m. The GROUPS variable is no longer readonly; assignments to it are silently | |
9003 | discarded. This means it can be unset. | |
9004 | ||
9005 | 4. New Features in Readline | |
9006 | ||
9007 | a. Parentheses matching is now always compiled into readline, and enabled | |
9008 | or disabled when the value of the `blink-matching-paren' variable is | |
9009 | changed. | |
9010 | ||
9011 | b. MS-DOS systems now use ~/_inputrc as the last-ditch inputrc filename. | |
9012 | ||
9013 | c. MS-DOS systems now use ~/_history as the default history file. | |
9014 | ||
9015 | d. history-search-{forward,backward} now leave the point at the end of the | |
9016 | line when the string to search for is empty, like | |
9017 | {reverse,forward}-search-history. | |
9018 | ||
9019 | e. history-search-{forward,backward} now leave the last history line found | |
9020 | in the readline buffer if the second or subsequent search fails. | |
9021 | ||
9022 | f. New function for use by applications: rl_on_new_line_with_prompt, used | |
9023 | when an application displays the prompt itself before calling readline(). | |
9024 | ||
9025 | g. New variable for use by applications: rl_already_prompted. An application | |
9026 | that displays the prompt itself before calling readline() must set this to | |
9027 | a non-zero value. | |
9028 | ||
9029 | ------------------------------------------------------------------------------ | |
b72432fd JA |
9030 | This document details the changes between this version, bash-2.03-release, |
9031 | and the previous version, bash-2.03-beta2. | |
9032 | ||
9033 | 1. Changes to Bash | |
9034 | ||
9035 | a. A file descriptor leak in the `fc' builtin was fixed. | |
9036 | ||
9037 | b. A bug was fixed in the `read' builtin that caused occasional spurious | |
9038 | failures when using `read -e'. | |
9039 | ||
9040 | c. The version code needed to use the value of the cpp variable | |
9041 | CONF_MACHTYPE rather than MACHTYPE. | |
9042 | ||
9043 | d. A new test was added to exercise the command printing and copying code. | |
9044 | ||
9045 | e. A bug was fixed that caused `time' to be recognized as a reserved word | |
9046 | if it was the first pattern in a `case' statement pattern list. | |
9047 | ||
9048 | ------------------------------------------------------------------------------ | |
9049 | This document details the changes between this version, bash-2.03-beta2, | |
9050 | and the previous version, bash-2.03-beta1. | |
9051 | ||
9052 | 1. Changes to Bash | |
9053 | ||
9054 | a. Slight additions to support/shobj-conf, mostly for the benefit of AIX 4.2. | |
9055 | ||
9056 | b. config.{guess,sub} support added for the NEC SX4. | |
9057 | ||
9058 | c. Changed some of the cross-compiling sections of the configure macros in | |
9059 | aclocal.m4 so that configure won't abort. | |
9060 | ||
9061 | d. Slight changes to how the HTML versions of the bash and readline manuals | |
9062 | are generated. | |
9063 | ||
9064 | e. Fixed conditional command printing to avoid interpreting printf `%'-escapes | |
9065 | in arguments to [[. | |
9066 | ||
9067 | f. Don't include the bash malloc on all variants of the alpha processor. | |
9068 | ||
9069 | g. Changes to configure to make --enable-profiling work on Solaris 2.x. | |
9070 | ||
9071 | h. Fixed a bug that manifested itself when shell functions were called | |
9072 | between calls to `getopts'. | |
9073 | ||
9074 | i. Fixed pattern substitution so that a bare `#'as a pattern causes the | |
9075 | replacement string to be prefixed to the search string, and a bare | |
9076 | `%' causes the replacement string to be appended to the search string. | |
9077 | ||
9078 | j. Fixed a bug in the command execution code that caused child processes | |
9079 | to occasionally have the wrong value for $!. | |
9080 | ||
9081 | 2. Changes to Readline | |
9082 | ||
9083 | a. Added code to the history library to catch history substitutions using | |
9084 | `&' without a previous history substitution or search having been | |
9085 | performed. | |
9086 | ||
9087 | 3. New Features in Bash | |
9088 | ||
9089 | 4. New Features in Readline | |
9090 | ||
9091 | a. New bindable variable: `isearch-terminators'. | |
9092 | ||
9093 | b. New bindable function: `forward-backward-delete-char' (unbound by default). | |
9094 | ||
9095 | ------------------------------------------------------------------------------ | |
9096 | This document details the changes between this version, bash-2.03-beta1, | |
9097 | and the previous version, bash-2.03-alpha. | |
9098 | ||
9099 | 1. Changes to Bash | |
9100 | ||
9101 | a. A change was made to the help text for `{...}' to make it clear that a | |
9102 | semicolon is required before the closing brace. | |
9103 | ||
9104 | b. A fix was made to the `test' builtin so that syntax errors cause test | |
9105 | to return an exit status > 1. | |
9106 | ||
9107 | c. Globbing is no longer performed on assignment statements that appear as | |
9108 | arguments to `assignment builtins' such as `export'. | |
9109 | ||
9110 | d. System-specific configuration changes were made for: Rhapsody, | |
9111 | AIX 4.2/gcc, BSD/OS 4.0. | |
9112 | ||
9113 | e. New loadable builtins: ln, unlink. | |
9114 | ||
9115 | f. Some fixes were made to the globbing code to handle extended glob patterns | |
9116 | which immediately follow a `*'. | |
9117 | ||
9118 | g. A fix was made to the command printing code to ensure that redirections | |
9119 | following compound commands have a space separating them from the rest | |
9120 | of the command. | |
9121 | ||
9122 | h. The pathname canonicalization code was changed to produce fewer leading | |
9123 | `//' sequences, since those are interpreted as network file system | |
9124 | pathnames on some systems. | |
9125 | ||
9126 | i. A fix was made so that loops containing `eval' commands in commands passed | |
9127 | to `bash -c' would not exit prematurely. | |
9128 | ||
9129 | j. Some changes were made to the job reaping code when the shell is not | |
9130 | interactive, so the shell will retain exit statuses longer for examination | |
9131 | by `wait'. | |
9132 | ||
9133 | k. A fix was made so that `jobs | command' works again. | |
9134 | ||
9135 | l. The erroneous compound array assignment var=((...)) is now a syntax error. | |
9136 | ||
9137 | m. A change was made to the dynamic loading code in `enable' to support | |
9138 | Tenon's MachTen. | |
9139 | ||
9140 | n. A fix was made to the globbing code so that extended globbing patterns | |
9141 | will correctly match `.' in a bracket expression. | |
9142 | ||
9143 | 2. Changes to Readline | |
9144 | ||
9145 | a. A fix was made to the completion code in which a typo caused the wrong | |
9146 | value to be passed to the function that computed the longest common | |
9147 | prefix of the list of matches. | |
9148 | ||
9149 | b. The completion code now checks the value of rl_filename_completion_desired, | |
9150 | which is set by application-supplied completion functions to indicate | |
9151 | that filename completion is being performed, to decide whether or not to | |
9152 | call an application-supplied `ignore completions' function. | |
9153 | ||
9154 | 3. New Features in Bash | |
9155 | ||
9156 | a. A change was made to the startup file code so that any shell begun with | |
9157 | the `--login' option, even non-interactive shells, will source the login | |
9158 | shell startup files. | |
9159 | ||
9160 | 4. New Features in Readline | |
9161 | ||
9162 | a. A new variable, rl_erase_empty_line, which, if set by an application using | |
9163 | readline, will cause readline to erase, prompt and all, lines on which the | |
9164 | only thing typed was a newline. | |
9165 | ||
9166 | ------------------------------------------------------------------------------ | |
9167 | This document details the changes between this version, bash-2.03-alpha, | |
9168 | and the previous version, bash-2.02.1-release. | |
9169 | ||
9170 | 1. Changes to Bash | |
9171 | ||
9172 | a. System-specific configuration changes were made for: Irix 6.x, Unixware 7. | |
9173 | ||
9174 | b. The texi2dvi and texi2html scripts were updated to the latest versions | |
9175 | from the net. | |
9176 | ||
9177 | c. The configure tests that determine which native type is 32 bits were | |
9178 | changed to not require a compiled program. | |
9179 | ||
9180 | d. Fixed a bug in shell_execve that could cause memory to be freed twice | |
9181 | after a failed exec. | |
9182 | ||
9183 | e. The `printf' test uses `diff -a' if it's available to prevent confusion | |
9184 | due to the non-ascii output. | |
9185 | ||
9186 | f. Shared object configuration is now performed by a shell script, | |
9187 | support/shobj-conf, which generates values to be substituted into | |
9188 | makefiles by configure. | |
9189 | ||
9190 | g. Some changes were made to `ulimit' to avoid the use of RLIM_INVALID as a | |
9191 | return value. | |
9192 | ||
9193 | h. Changes were made to `ulimit' to work around HPUX 9.x's peculiar | |
9194 | handling of RLIMIT_FILESIZE. | |
9195 | ||
9196 | i. Some new loadable builtins were added: id, printenv, sync, whoami, push, | |
9197 | mkdir. `pushd', `popd', and `dirs' can now be built as regular or | |
9198 | loadable builtins from the same source file. | |
9199 | ||
9200 | j. Changes were made to `printf' to handle NUL bytes in the expanded format | |
9201 | string. | |
9202 | ||
9203 | k. The various `make clean' Makefile targets now descend into lib/sh. | |
9204 | ||
9205 | l. The `type' builtin was changed to use the internal `getopt' so that things | |
9206 | like `type -ap' work as expected. | |
9207 | ||
9208 | m. There is a new configuration option, --with-installed-readline, to link | |
9209 | bash with a locally-installed version of readline. Only readline version | |
9210 | 4.0 and later releases can support this. Shared and static libraries | |
9211 | are supported. The installed include files are used. | |
9212 | ||
9213 | n. There is a new autoconf macro used to find which basic type is 64 bits. | |
9214 | ||
9215 | o. Dynamic linking and loadable builtins should now work on SCO 3.2v5*, | |
9216 | AIX 4.2 with gcc, Unixware 7, and many other systems using gcc, where | |
9217 | the `-shared' options works correctly. | |
9218 | ||
9219 | p. A bug was fixed in the bash filename completion code that caused memory to | |
9220 | be freed twice if a directory name containing an unset variable was | |
9221 | completed and the -u option was set. | |
9222 | ||
9223 | q. The prompt expansion code now quotes the `$' in the `\$' expansion so it | |
9224 | is not processed by subsequent parameter expansion. | |
9225 | ||
9226 | r. Fixed a parsing bug that caused a single or double quote after a `$$' to | |
9227 | trigger ANSI C expansion or locale translation. | |
9228 | ||
9229 | s. Fixed a bug in the globbing code that caused quoted filenames containing | |
9230 | no globbing characters to sometimes be incorrectly expanded. | |
9231 | ||
9232 | t. Changes to the default prompt strings if prompt string decoding is not | |
9233 | compiled into the shell. | |
9234 | ||
9235 | u. Added `do', `then', `else', `{', and `(' to the list of keywords that may | |
9236 | precede the `time' reserved word. | |
9237 | ||
9238 | v. The shell may now be cross-built for BeOS as well as cygwin32. | |
9239 | ||
9240 | w. The conditional command execution code now treats `=' the same as `==' | |
9241 | for deciding when to perform pattern matching. | |
9242 | ||
9243 | x. The `-e' option no longer causes the shell to exit if a command exits | |
9244 | with a non-zero status while running the startup files. | |
9245 | ||
9246 | y. The `printf' builtin no longer dumps core if a modifier is supplied in | |
9247 | the format string without a conversion character (e.g. `%h'). | |
9248 | ||
9249 | z. Array assignments of the form a=(...) no longer show up in the history | |
9250 | list. | |
9251 | ||
9252 | aa. The parser was fixed to obey the POSIX.2 rules for finding the closing | |
9253 | `}' in a ${...} expression. | |
9254 | ||
9255 | bb. The history file is now opened with mode 0600 rather than 0666, so bash | |
9256 | no longer relies on the user's umask being set appropriately. | |
9257 | ||
9258 | cc. Setting LANG no longer causes LC_ALL to be assigned a value; bash now | |
9259 | relies on proper behavior from the C library. | |
9260 | ||
9261 | dd. Minor changes were made to allow quoted variable expansions using | |
9262 | ${...} to be completed correctly if there is no closing `"'. | |
9263 | ||
9264 | ee. Changes were made to builtins/Makefile.in so that configuring the shell | |
9265 | with `--enable-profiling' works right and builtins/mkbuiltins is | |
9266 | generated. | |
9267 | ||
9268 | 2. Changes to Readline | |
9269 | ||
9270 | a. The version number is now 4.0. | |
9271 | ||
9272 | b. There is no longer any #ifdef SHELL code in the source files. | |
9273 | ||
9274 | c. Some changes were made to the key binding code to fix memory leaks and | |
9275 | better support Win32 systems. | |
9276 | ||
9277 | d. Fixed a silly typo in the paren matching code -- it's microseconds, not | |
9278 | milliseconds. | |
9279 | ||
9280 | e. The readline library should be compilable by C++ compilers. | |
9281 | ||
9282 | f. The readline.h public header file now includes function prototypes for | |
9283 | all readline functions, and some changes were made to fix errors in the | |
9284 | source files uncovered by the use of prototypes. | |
9285 | ||
9286 | g. The maximum numeric argument is now clamped at 1000000. | |
9287 | ||
9288 | h. Fixes to rl_yank_last_arg to make it behave better. | |
9289 | ||
9290 | i. Fixed a bug in the display code that caused core dumps if the prompt | |
9291 | string length exceeded 1024 characters. | |
9292 | ||
9293 | j. The menu completion code was fixed to properly insert a single completion | |
9294 | if there is only one match. | |
9295 | ||
9296 | k. A bug was fixed that caused the display code to improperly display tabs | |
9297 | after newlines. | |
9298 | ||
9299 | 3. New Features in Bash | |
9300 | ||
9301 | a. New `shopt' option, `restricted_shell', indicating whether or not the | |
9302 | shell was started in restricted mode, for use in startup files. | |
9303 | ||
9304 | b. Filename generation is now performed on the words between ( and ) in | |
9305 | array assignments (which it probably should have done all along). | |
9306 | ||
9307 | c. OLDPWD is now auto-exported, as POSIX.2 seems to require. | |
9308 | ||
9309 | d. ENV and BASH_ENV are read-only variables in a restricted shell. | |
9310 | ||
9311 | 4. New Features in Readline | |
9312 | ||
9313 | a. Many changes to the signal handling: | |
9314 | o Readline now catches SIGQUIT and cleans up the tty before returning; | |
9315 | o A new variable, rl_catch_signals, is available to application writers | |
9316 | to indicate to readline whether or not it should install its own | |
9317 | signal handlers for SIGINT, SIGTERM, SIGQUIT, SIGALRM, SIGTSTP, | |
9318 | SIGTTIN, and SIGTTOU; | |
9319 | o A new variable, rl_catch_sigwinch, is available to application | |
9320 | writers to indicate to readline whether or not it should install its | |
9321 | own signal handler for SIGWINCH, which will chain to the calling | |
9322 | applications's SIGWINCH handler, if one is installed; | |
9323 | o There is a new function, rl_free_line_state, for application signal | |
9324 | handlers to call to free up the state associated with the current | |
9325 | line after receiving a signal; | |
9326 | o There is a new function, rl_cleanup_after_signal, to clean up the | |
9327 | display and terminal state after receiving a signal; | |
9328 | o There is a new function, rl_reset_after_signal, to reinitialize the | |
9329 | terminal and display state after an application signal handler | |
9330 | returns and readline continues | |
9331 | ||
9332 | b. There is a new function, rl_resize_terminal, to reset readline's idea of | |
9333 | the screen size after a SIGWINCH. | |
9334 | ||
9335 | c. New public functions: rl_save_prompt and rl_restore_prompt. These were | |
9336 | previously private functions with a `_' prefix. | |
9337 | ||
9338 | d. New function hook: rl_pre_input_hook, called just before readline starts | |
9339 | reading input, after initialization. | |
9340 | ||
9341 | e. New function hook: rl_display_matches_hook, called when readline would | |
9342 | display the list of completion matches. The new function | |
9343 | rl_display_match_list is what readline uses internally, and is available | |
9344 | for use by application functions called via this hook. | |
9345 | ||
9346 | f. New bindable function, delete-char-or-list, like tcsh. | |
9347 | ||
9348 | ------------------------------------------------------------------------------ | |
bc4cd23c JA |
9349 | This document details the changes between this version, bash-2.02.1-release, |
9350 | and the previous version, bash-2.02-release. | |
9351 | ||
9352 | 1. Changes to Bash | |
9353 | ||
9354 | a. A bug that caused the bash readline support to not compile unless aliases | |
9355 | and csh-style history were configured into the shell was fixed. | |
9356 | ||
9357 | b. Fixed a bug that could cause a core dump when here documents contained | |
9358 | more than 1000 characters. | |
9359 | ||
9360 | c. Fixed a bug that caused a CDPATH entry of "" to not be treated the same | |
9361 | as the current directory when in POSIX mode. | |
9362 | ||
9363 | d. Fixed an alignment problem with the memory returned by the bash malloc, | |
9364 | so returned memory is now 64-bit aligned. | |
9365 | ||
9366 | e. Fixed a bug that caused command substitutions executed within pipelines | |
9367 | to put the terminal in the wrong process group. | |
9368 | ||
9369 | f. Fixes to support/config.sub for: alphas, SCO Open Server and Open Desktop, | |
9370 | Unixware 2, and Unixware 7. | |
9371 | ||
9372 | g. Fixes to the pattern matching code to make it work correctly for eight-bit | |
9373 | characters. | |
9374 | ||
9375 | h. Fixed a problem that occasionally caused the shell to display the wrong | |
9376 | value for the new working directory when changing to a directory found | |
9377 | in $CDPATH when in physical mode. | |
9378 | ||
9379 | i. Fixed a bug that caused core dumps when using conditional commands in | |
9380 | shell functions. | |
9381 | ||
9382 | j. Fixed a bug that caused the printf builtin to loop forever if the format | |
9383 | string did not consume any of the arguments. | |
9384 | ||
9385 | k. Fixed a bug in the parameter expansion code that caused "$@" to be | |
9386 | incorrectly split if $IFS did not contain a space character. | |
9387 | ||
9388 | l. Fixed a bug that could cause a core dump when completing hostnames if | |
9389 | the number of matching hostnames was an exact multiple of 16. | |
9390 | ||
9391 | m. Fixed a bug that caused the shell to fork too early when a command | |
9392 | such as `%2 &' was given. | |
9393 | ||
9394 | 2. Changes to Readline | |
9395 | ||
9396 | a. Fixed a problem with redisplay that showed up when the prompt string was | |
9397 | longer than the screen width and the prompt contained invisible characters. | |
9398 | ||
9399 | ------------------------------------------------------------------------------ | |
9400 | This document details the changes between this version, bash-2.02-release, | |
9401 | and the previous version, bash-2.02-beta2. | |
cce855bc JA |
9402 | |
9403 | 1. Changes to Bash | |
9404 | ||
9405 | a. A bug was fixed that caused the terminal process group to be set | |
9406 | incorrectly when performing command substitution of builtins in a | |
9407 | pipeline. | |
9408 | ||
9409 | ------------------------------------------------------------------------------ | |
9410 | This document details the changes between this version, bash-2.02-beta2, | |
9411 | and the previous version, bash-2.02-beta1. | |
9412 | ||
9413 | 1. Changes to Bash | |
9414 | ||
9415 | a. Attempting to `wait' for stopped jobs now generates a warning message. | |
9416 | ||
9417 | b. Pipelines which exit due to SIGPIPE in non-interactive shells are now | |
9418 | not reported if the shell is compiled -DDONT_REPORT_SIGPIPE. | |
9419 | ||
9420 | c. Some changes were made to builtins/psize.sh and support/bashbug.sh to | |
9421 | attempt to avoid some /tmp file races and surreptitious file | |
9422 | substitutions. | |
9423 | ||
9424 | d. Fixed a bug that caused the shell not to compile if configured with | |
9425 | dparen arithmetic but without aliases. | |
9426 | ||
9427 | e. Fixed a bug that caused the input stream to be switched when assigning | |
9428 | empty arrays with `bash -c'. | |
9429 | ||
9430 | f. A bug was fixed in the readline expansion glue code that caused bash to | |
9431 | dump core when expanding lines with an unclosed single quote. | |
9432 | ||
9433 | g. A fix was made to the `cd' builtin so that using a non-empty directory | |
9434 | from $CDPATH results in an absolute pathname of the new current working | |
9435 | directory to be displayed after the current directory is changed. | |
9436 | ||
9437 | h. Fixed a bug in the variable assignment code that caused the shell to | |
9438 | dump core when referencing an unset variable with `set -u' enabled in | |
9439 | an assignment statement preceding a command. | |
9440 | ||
9441 | i. Fixed a bug in the exit trap code that caused reserved words to not be | |
9442 | recognized under certain circumstances. | |
9443 | ||
9444 | j. Fixed a bug in the parameter pattern substitution code so that quote | |
9445 | removal is performed. | |
9446 | ||
9447 | k. The shell should now configure correctly on Apple Rhapsody systems. | |
9448 | ||
9449 | l. The `kill' builtin now prints a usage message if it is not passed any | |
9450 | arguments. | |
9451 | ||
9452 | ------------------------------------------------------------------------------ | |
9453 | This document details the changes between this version, bash-2.02-beta1, | |
9454 | and the previous version, bash-2.02-alpha1. | |
9455 | ||
9456 | 1. Changes to Bash | |
9457 | ||
9458 | a. A few compilation bugs were fixed in the new extended globbing code. | |
9459 | ||
9460 | b. Executing arithmetic commands now sets the command name to `((' so | |
9461 | error messages look right. | |
9462 | ||
9463 | c. Fixed some build problems with various configuration options. | |
9464 | ||
9465 | d. The `printf' builtin now aborts immediately if an illegal format | |
9466 | character is encountered. | |
9467 | ||
9468 | e. The code that creates here-documents now behaves better if the file it's | |
9469 | trying to create already exists for some reason. | |
9470 | ||
9471 | f. Fixed a problem with the extended globbing code that made patterns like | |
9472 | `x+*' expand incorrectly. | |
9473 | ||
9474 | g. The prompt string expansion code no longer quotes tildes with backslashes. | |
9475 | ||
9476 | h. The bash getcwd() implementation in lib/sh/getcwd.c now behaves better in | |
9477 | the presence of lstat(2) failures. | |
9478 | ||
9479 | i. Fixed a bug with strsub() that caused core dumps when executing `fc -s'. | |
9480 | ||
9481 | j. The mail checking code now ensures that it has a valid default mailpath. | |
9482 | ||
9483 | k. A bug was fixed that caused local variables to be unset inappropriately | |
9484 | when sourcing a script from within another sourced script. | |
9485 | ||
9486 | l. A bug was fixed in the history saving code so that functions are saved | |
9487 | in the history list correctly if `cmdhist' is enabled, but `lithist' | |
9488 | is not. | |
9489 | ||
9490 | m. A bug was fixed that caused printf overflows when displaying error | |
9491 | messages. | |
9492 | ||
9493 | n. It should be easier to build the loadble builtins in examples/loadables, | |
9494 | though some manual editing of the generated Makefile is still required. | |
9495 | ||
9496 | o. The user's primary group is now always ${GROUPS[0]}. | |
9497 | ||
9498 | p. Some updates were made to support/config.guess from the GNU master copy. | |
9499 | ||
9500 | q. Some changes were made to the autoconf support for Solaris 2.6 large | |
9501 | files. | |
9502 | ||
9503 | r. The `command' builtins now does the right thing when confstr(3) cannot | |
9504 | find a value for _CS_PATH. | |
9505 | ||
9506 | s. Extended globbing expressions like `*.!(c)' are not history expanded if | |
9507 | `extglob' is enabled. | |
9508 | ||
9509 | t. Using the `-P' option to `cd' will force the value that is assigned to | |
9510 | PWD to not contain any symbolic links. | |
9511 | ||
9512 | 2. Changes to Readline | |
9513 | ||
9514 | a. The code that prints completion listings now behaves better if one or | |
9515 | more of the filenames contains non-printable characters. | |
9516 | ||
9517 | b. The time delay when showing matching parentheses is now 0.5 seconds. | |
9518 | ||
9519 | ------------------------------------------------------------------------------ | |
9520 | This document details the changes between this version, bash-2.02-alpha1, | |
9521 | and the previous version, bash-2.01.1-release. | |
9522 | ||
9523 | 1. Changes to Bash | |
9524 | ||
9525 | a. OS-specific configuration changes for: BSD/OS 3.x, Minix 2.x, | |
9526 | Solaris 2.6, SINIX SVR4. | |
9527 | ||
9528 | b. Changes were made to the generated `info' files so that `install-info' | |
9529 | works correctly. | |
9530 | ||
9531 | c. PWD is now auto-exported. | |
9532 | ||
9533 | d. A fix was made to the pipeline code to make sure that the shell forks | |
9534 | to execute simple commands consisting solely of assignment statements. | |
9535 | ||
9536 | e. Changes to the test suite for systems with 14-character filenames. | |
9537 | ||
9538 | f. The default sizes of some internal hash tables have been made smaller | |
9539 | to reduce the shell's memory footprint. | |
9540 | ||
9541 | g. The `((...))' arithmetic command is now executed directly instead of | |
9542 | being translated into `let "..."'. | |
9543 | ||
9544 | h. Fixes were made to the expansion code so that "$*", "$@", "${array[@]}", | |
9545 | and "${array[@]}" expand correctly when IFS does not contain a space | |
9546 | character, is unset, or is set to NULL. | |
9547 | ||
9548 | i. The indirect expansion code (${!var}) was changed so that the only | |
9549 | valid values of `var' are variable names, positional parameters, `#', | |
9550 | `@', and `*'. | |
9551 | ||
9552 | j. An arithmetic expression error in a $((...)) expansion now causes a | |
9553 | non-interactive shell running in posix mode to exit. | |
9554 | ||
9555 | k. Compound array assignment now splits the words within the parentheses | |
9556 | on shell metacharacters like the parser would before expansing them | |
9557 | and performing the assignment. This is for compatibility with ksh-93. | |
9558 | ||
9559 | l. The internal shell backslash-quoting code (used in the output of `set' | |
9560 | and completion) now quotes tildes if they appear at the start of the | |
9561 | string or after a `=' or `:'. | |
9562 | ||
9563 | m. A couple of bugs with `shopt -o' were fixed. | |
9564 | ||
9565 | n. `bash +o' now displays the same output as `set +o' before starting an | |
9566 | interactive shell. | |
9567 | ||
9568 | o. A bug that caused command substitution and the `eval' builtin to | |
9569 | occasionally free memory twice when an error was encountered was fixed. | |
9570 | ||
9571 | p. The filename globbing code no longer requires read permission for a | |
9572 | directory when the filename to be matched does not contain any globbing | |
9573 | characters, as POSIX.2 specifies. | |
9574 | ||
9575 | q. A bug was fixed so that the job containing the last asynchronous | |
9576 | process is not removed from the job table until a `wait' is executed | |
9577 | for that process or another asynchronous process is started. This | |
9578 | satisfies a POSIX.2 requirement. | |
9579 | ||
9580 | r. A `select' bug was fixed so that a non-numeric user response is treated | |
9581 | the same as a numeric response that is out of range. | |
9582 | ||
9583 | s. The shell no longer parses the value of SHELLOPTS from the environment | |
9584 | if it is restricted, running setuid, or running in `privileged mode'. | |
9585 | ||
9586 | t. Fixes were made to enable large file support on systems such as | |
9587 | Solaris 2.6, where the size of a file may be larger than can be held | |
9588 | in an `int'. | |
9589 | ||
9590 | u. The filename hashing code was fixed to not add `./' to the beginning of | |
9591 | filenames which already begin with `./'. | |
9592 | ||
9593 | v. The configure script was changed so that the GNU termcap library is not | |
9594 | compiled in if `prefer-curses' has been specified. | |
9595 | ||
9596 | w. HISTCONTROL and HISTIGNORE are no longer applied to the second and | |
9597 | subsequent lines of a multi-line command. | |
9598 | ||
9599 | x. A fix was made to `disown' so that it does a better job of catching | |
9600 | out-of-range jobs. | |
9601 | ||
9602 | y. Non-interactive shells no longer report the status of processes terminated | |
9603 | due to SIGINT, even if the standard output is a terminal. | |
9604 | ||
9605 | z. A bug that caused the output of `jobs' to have extra carriage returns | |
9606 | was fixed. | |
9607 | ||
9608 | aa. A bug that caused PIPESTATUS to not be set when builtins or shell | |
9609 | functions were executed in the foreground was fixed. | |
9610 | ||
9611 | bb. Bash now attempts to detect when it is being run by sshd, and treats | |
9612 | that case identically to being run by rshd. | |
9613 | ||
9614 | cc. A bug that caused `set -a' to export SHELLOPTS when one of the shell | |
9615 | options was changed was fixed. | |
9616 | ||
9617 | dd. The `kill' builtin now disallows empty or missing process id arguments | |
9618 | instead of treating them as identical to `0', which means the current | |
9619 | process. | |
9620 | ||
9621 | ee. `var=value declare -x var' now behaves identically to | |
9622 | `var=value export var'. Similarly for `var=value declare -r var' and | |
9623 | `var=value readonly var'. | |
9624 | ||
9625 | ff. A few memory leaks were fixed. | |
9626 | ||
9627 | gg. `alias' and `unalias' now print error messages when passed an argument | |
9628 | that is not an alias for printing or deletion, even when the shell is | |
9629 | not interactive, as POSIX.2 specifies. | |
9630 | ||
9631 | hh. `alias' and `alias -p' now return a status of 0 when no aliases are | |
74091dd4 | 9632 | defined, as POSIX.2 specifies. |
cce855bc JA |
9633 | |
9634 | ii. `cd -' now prints the pathname of the new working directory if the shell | |
9635 | is interactive. | |
9636 | ||
9637 | jj. A fix was made so that the code that binds $PWD now copes with getcwd() | |
9638 | returning NULL. | |
9639 | ||
9640 | kk. `unset' now checks whether or not a function name it's trying to unset | |
9641 | is a valid shell identifier only when the shell is running in posix mode. | |
9642 | ||
9643 | ll. A change was made to the code that generates filenames for here documents | |
9644 | to make them less prone to name collisions. | |
9645 | ||
9646 | mm. The parser was changed so that `time' is recognized as a reserved word | |
9647 | only at the beginning of a pipeline. | |
9648 | ||
9649 | nn. The pathname canonicalization code was changed so that `//' is converted | |
9650 | into `/', but all other pathnames beginning with `//' are left alone, as | |
9651 | POSIX.2 specifies. | |
9652 | ||
9653 | oo. The `logout' builtin will no longer exit a non-interactive non-login | |
9654 | shell. | |
9655 | ||
9656 | 2. Changes to Readline | |
9657 | ||
9658 | a. Fixed a problem in the readline test program rltest.c that caused a core | |
9659 | dump. | |
9660 | ||
9661 | b. The code that handles parser directives in inputrc files now displays | |
9662 | more error messages. | |
9663 | ||
9664 | c. The history expansion code was fixed so that the appearance of the | |
9665 | history comment character at the beginning of a word inhibits history | |
9666 | expansion for that word and the rest of the input line. | |
9667 | ||
9668 | 3. New Features in Bash | |
9669 | ||
9670 | a. A new version of malloc, based on the older GNU malloc, that has many | |
9671 | changes, is more page-based, is more conservative with memory usage, | |
9672 | and does not `orphan' large blocks when they are freed. | |
9673 | ||
9674 | b. A new version of gmalloc, based on the old GLIBC malloc, with many | |
9675 | changes and range checking included by default. | |
9676 | ||
9677 | c. A new implementation of fnmatch(3) that includes full POSIX.2 Basic | |
9678 | Regular Expression matching, including character classes, collating | |
9679 | symbols, equivalence classes, and support for case-insensitive pattern | |
9680 | matching. | |
9681 | ||
9682 | d. ksh-88 egrep-style extended pattern matching ([@+*?!](patlist)) has been | |
9683 | implemented, controlled by a new `shopt' option, `extglob'. | |
9684 | ||
9685 | e. There is a new ksh-like `[[' compound command, which implements | |
9686 | extended `test' functionality. | |
9687 | ||
9688 | f. There is a new `printf' builtin, implemented according to the POSIX.2 | |
9689 | specification. | |
9690 | ||
9691 | g. There is a new feature for command substitution: $(< filename) now expands | |
9692 | to the contents of `filename', with any trailing newlines removed | |
9693 | (equivalent to $(cat filename)). | |
9694 | ||
9695 | h. There are new tilde prefixes which expand to directories from the | |
9696 | directory stack. | |
9697 | ||
9698 | i. There is a new `**' arithmetic operator to do exponentiation. | |
9699 | ||
9700 | j. There are new configuration options to control how bash is linked: | |
9701 | `--enable-profiling', to allow bash to be profiled with gprof, and | |
9702 | `--enable-static-link', to allow bash to be linked statically. | |
9703 | ||
9704 | k. There is a new configuration option, `--enable-cond-command', which | |
9705 | controls whether or not the `[[' command is included. It is on by | |
9706 | default. | |
9707 | ||
9708 | l. There is a new configuration option, `--enable-extended-glob', which | |
9709 | controls whether or not the ksh extended globbing feature is included. | |
9710 | It is enabled by default. | |
9711 | ||
9712 | m. There is a new configuration #define in config.h.top that, when enabled, | |
9713 | will cause all login shells to source /etc/profile and one of the user- | |
9714 | specific login shell startup files, whether or not the shell is | |
9715 | interactive. | |
9716 | ||
9717 | n. There is a new invocation option, `--dump-po-strings', to dump | |
9718 | a shell script's translatable strings ($"...") in GNU `po' format. | |
9719 | ||
9720 | o. There is a new `shopt' option, `nocaseglob', to enable case-insensitive | |
9721 | pattern matching when globbing filenames and using the `case' construct. | |
9722 | ||
9723 | p. There is a new `shopt' option, `huponexit', which, when enabled, causes | |
9724 | the shell to send SIGHUP to all jobs when an interactive login shell | |
9725 | exits. | |
9726 | ||
9727 | q. `bind' has a new `-u' option, which takes a readline function name as an | |
9728 | argument and unbinds all key sequences bound to that function in a | |
9729 | specified keymap. | |
9730 | ||
9731 | r. `disown' now has `-a' and `-r' options, to limit operation to all jobs | |
9732 | and running jobs, respectively. | |
9733 | ||
9734 | s. The `shopt' `-p' option now causes output to be displayed in a reusable | |
9735 | format. | |
9736 | ||
9737 | t. `test' has a new `-N' option, which returns true if the filename argument | |
9738 | has been modified since it was last accessed. | |
9739 | ||
9740 | u. `umask' now has a `-p' option to print output in a reusable format. | |
9741 | ||
9742 | v. A new escape sequence, `\xNNN', has been added to the `echo -e' and $'...' | |
9743 | translation code. It expands to the character whose ascii code is NNN | |
9744 | in hexadecimal. | |
9745 | ||
9746 | w. The prompt string expansion code has a new `\r' escape sequence. | |
9747 | ||
9748 | x. The shell may now be cross-compiled for the CYGWIN32 environment on | |
9749 | a Unix machine. | |
9750 | ||
9751 | 4. New Features in Readline | |
9752 | ||
9753 | a. There is now an option for `iterative' yank-last-arg handline, so a user | |
9754 | can keep entering `M-.', yanking the last argument of successive history | |
9755 | lines. | |
9756 | ||
9757 | b. New variable, `print-completions-horizontally', which causes completion | |
9758 | matches to be displayed across the screen (like `ls -x') rather than up | |
9759 | and down the screen (like `ls'). | |
9760 | ||
9761 | c. New variable, `completion-ignore-case', which causes filename completion | |
9762 | and matching to be performed case-insensitively. | |
9763 | ||
9764 | d. There is a new bindable command, `magic-space', which causes history | |
9765 | expansion to be performed on the current readline buffer and a space to | |
9766 | be inserted into the result. | |
9767 | ||
9768 | e. There is a new bindable command, `menu-complete', which enables tcsh-like | |
9769 | menu completion (successive executions of menu-complete insert a single | |
9770 | completion match, cycling through the list of possible completions). | |
9771 | ||
9772 | f. There is a new bindable command, `paste-from-clipboard', for use on Win32 | |
9773 | systems, to insert the text from the Win32 clipboard into the editing | |
9774 | buffer. | |
9775 | ||
9776 | g. The key sequence translation code now understands printf-style backslash | |
9777 | escape sequences, including \NNN octal escapes. These escape sequences | |
9778 | may be used in key sequence definitions or macro values. | |
9779 | ||
9780 | h. An `$include' inputrc file parser directive has been added. | |
9781 | ||
9782 | ------------------------------------------------------------------------------ | |
e8ce775d JA |
9783 | This document details the changes between this version, bash-2.01.1-release, |
9784 | and the previous version, bash-2.01-release. | |
9785 | ||
9786 | 1. Changes to Bash | |
9787 | ||
9788 | a. The select command was fixed to check the validity of the user's | |
9789 | input more strenuously. | |
9790 | ||
9791 | b. A bug was fixed that prevented `time' from timing commands correctly | |
9792 | when supplied as an argument to `bash -c'. | |
9793 | ||
9794 | c. A fix was made to the mail checking code to keep from adding the same | |
9795 | mail file to the list of files to check multiple times when parsing | |
9796 | $MAILPATH. | |
9797 | ||
9798 | d. Fixed an off-by-one error in the tilde expansion library. | |
9799 | ||
9800 | e. When using the compound array assignment syntax, the old value of | |
9801 | the array is cleared before assigning the new value. | |
9802 | ||
9803 | f. Fixed a bug that could cause a core dump when a trap handler was reset | |
9804 | to the default in the trap command associated with that signal. | |
9805 | ||
9806 | g. Fixed a bug in the locale code that occurred when assigning a value | |
9807 | to LC_ALL. | |
9808 | ||
9809 | h. A change was made to the parser so that words of the form xxx=(...) | |
9810 | are not considered compound assignment statements unless there are | |
9811 | characters before the `='. | |
9812 | ||
9813 | i. A fix was made to the command tracing code to correctly quote each | |
9814 | word of output. | |
9815 | ||
9816 | j. Some changes were made to the bash-specific autoconf tests to make them | |
9817 | more portable. | |
9818 | ||
9819 | k. Completion of words with globbing characters now correctly quotes the | |
9820 | result. | |
9821 | ||
9822 | l. The directory /var/spool/mail is now preferred to /usr/spool/mail when | |
9823 | configure is deciding on the default mail directory. | |
9824 | ||
9825 | m. The brace completion code was fixed to not quote the `{' and `}'. | |
9826 | ||
9827 | n. Some fixes were made to make $RANDOM more random in subshells. | |
9828 | ||
9829 | o. System-specific changes were made to configure for: SVR4.2 | |
9830 | ||
9831 | p. Changes were made so that completion of words containing globbing chars | |
9832 | substitutes the result only if a single filename was matched. | |
9833 | ||
9834 | q. The window size is now recomputed after a job is stopped with SIGTSTP if | |
9835 | the user has set `checkwinsize' with `shopt'. | |
9836 | ||
9837 | r. When doing substring expansion, out-of-range substring specifiers now | |
9838 | cause nothing to be substituted rather than an expansion error. | |
9839 | ||
9840 | s. A fix was made so that you can no longer trap `SIGEXIT' or `SIGDEBUG' -- | |
9841 | only `EXIT' and `DEBUG' are accepted. | |
9842 | ||
9843 | t. The display of trapped signals now uses the signal number if signals | |
9844 | for which bash does not know the name are trapped. | |
9845 | ||
9846 | u. A fix was made so that `bash -r' does not turn on restricted mode until | |
9847 | after the startup files are executed. | |
9848 | ||
9849 | v. A bug was fixed that occasionally caused a core dump when a variable | |
9850 | found in the temporary environment of export/declare/readonly had a | |
9851 | null value. | |
9852 | ||
9853 | w. A bug that occasionally caused unallocated memory to be passed to free() | |
9854 | when doing arithmetic substitution was fixed. | |
9855 | ||
9856 | x. A bug that caused a buffer overrun when expanding a prompt string | |
9857 | containing `\w' and ${#PWD} exceeded PATH_MAX was fixed. | |
9858 | ||
9859 | y. A problem with the completion code that occasionally caused it to | |
9860 | refer to a character before the beginning of the readline line buffer | |
9861 | was fixed. | |
9862 | ||
9863 | z. A bug was fixed so that the `read' builtin restarts reads when | |
9864 | interrupted by signals other than SIGINT. | |
9865 | ||
9866 | aa. Fixed a bug that caused a command to be freed twice when there was | |
9867 | an evaluation error in the `eval' command. | |
9868 | ||
9869 | 2. Changes to Readline | |
9870 | ||
9871 | a. Added a missing `extern' to a declaration in readline.h that kept | |
9872 | readline from compiling cleanly on some systems. | |
9873 | ||
9874 | b. The history file is now opened with mode 0600 when it is written for | |
9875 | better security. | |
9876 | ||
9877 | c. Changes were made to the SIGWINCH handling code so that prompt redisplay | |
9878 | is done better. | |
9879 | ||
9880 | d. ^G now interrupts incremental searches correctly. | |
9881 | ||
9882 | e. A bug that caused a core dump when the set of characters to be quoted | |
9883 | when completing words was empty was fixed. | |
9884 | ||
9885 | ------------------------------------------------------------------------------ | |
d166f048 JA |
9886 | This document details the changes between this version, bash-2.01-release, |
9887 | and the previous version, bash-2.01-beta2. | |
9888 | ||
9889 | 1. Changes to Bash | |
9890 | ||
9891 | a. The `distclean' target should remove the `printenv' executable if it | |
9892 | has been created. | |
9893 | ||
9894 | b. The test suite was changed slightly to ensure that the error messages | |
9895 | are printed in English. | |
9896 | ||
9897 | c. A bug that caused the shell to dump core when a filename containing a | |
9898 | `/' was passed to `hash' was fixed. | |
9899 | ||
9900 | d. Pathname canonicalization now leaves a leading `//' intact, as POSIX.1 | |
9901 | requires. | |
9902 | ||
9903 | e. A memory leak when completing commands was fixed. | |
9904 | ||
9905 | f. A memory leak that occurred when checking the hash table for commands | |
9906 | with relative paths was fixed. | |
9907 | ||
9908 | ------------------------------------------------------------------------------ | |
9909 | This document details the changes between this version, bash-2.01-beta2, | |
9910 | and the previous version, bash-2.01-beta1. | |
9911 | ||
9912 | 1. Changes to Bash | |
9913 | ||
9914 | a. The `ulimit' builtin translates RLIM_INFINITY to the hard limit only if | |
9915 | the current (soft) limit is less than or equal to the hard limit. | |
9916 | ||
9917 | b. Fixed a bug that caused the bash emulation of strcasecmp to produce | |
9918 | incorrect results. | |
9919 | ||
9920 | c. A bug that caused memory to be freed twice when a trap handler resets | |
9921 | the trap more than once was fixed. | |
9922 | ||
9923 | d. A bug that caused machines where sizeof (pointer) > sizeof (int) to | |
9924 | fail (and possibly dump core) when trying to unwind-protect a null | |
9925 | pointer was fixed. | |
9926 | ||
9927 | e. The startup files should not be run with job control enabled. This fix | |
9928 | allows SIGINT to once again interrupt startup file execution. | |
9929 | ||
9930 | f. Bash should not change the SIGPROF handler if it is set to something | |
9931 | other than SIG_DFL. | |
9932 | ||
9933 | g. The completion code that provides bash-specific completions for readline | |
9934 | now quotes characters that the readline code would treat as word break | |
9935 | characters if they appear in a file name. | |
9936 | ||
9937 | h. The completion code now correctly quotes filenames containing a `!', | |
9938 | even if the user attempted to use double quotes when attempting | |
9939 | completion. | |
9940 | ||
9941 | i. A bug that caused the shell to dump core when `disown' was called without | |
9942 | arguments and there was no current job was fixed. | |
9943 | ||
9944 | j. A construct like $((foo);bar) is now processed as a command substitution | |
9945 | rather than as a bad arithmetic substitution. | |
9946 | ||
9947 | k. A couple of bugs that caused `fc' to not obey the `cmdhist' and `lithist' | |
9948 | shell options when editing and re-executing a series of commands were | |
9949 | fixed. | |
9950 | ||
9951 | l. A fix was made to the grammar -- the list of commands between `do' and | |
9952 | `done' in the body of a `for' command should be treated the same as a | |
9953 | while loop. | |
9954 | ||
9955 | 2. Changes to Readline | |
9956 | ||
9957 | a. A couple of bugs that caused the history search functions to attempt to | |
9958 | free a NULL pointer were fixed. | |
9959 | ||
9960 | b. If the C library provides setlocale(3), readline does not need to look | |
9961 | at various environment variables to decide whether or not to go into | |
9962 | eight-bit mode automatically -- just check whether the current locale | |
9963 | is not `C' or `POSIX'. | |
9964 | ||
9965 | c. If the filename completion function finds that a directory was not closed | |
9966 | by a previous (interrupted) completion, it closes the directory with | |
9967 | closedir(). | |
9968 | ||
9969 | 3. New Features in Bash | |
9970 | ||
9971 | a. New bindable readline commands: history-and-alias-expand-line and | |
9972 | alias-expand-line. The code was always in there, there was just no | |
9973 | way to execute it. | |
9974 | ||
9975 | ------------------------------------------------------------------------------ | |
9976 | This document details the changes between this version, bash-2.01-beta1, | |
9977 | and the previous version, bash-2.01-alpha1. | |
9978 | ||
9979 | 1. Changes to Bash | |
9980 | ||
9981 | a. Fixed a problem that could cause file descriptors used for process | |
9982 | substitution to conflict with those used explicitly in redirections. | |
9983 | ||
9984 | b. Made it easier to regenerate configure if the user changes configure.in. | |
9985 | ||
9986 | c. ${GROUPS[0]} should always be the primary group, even on systems without | |
9987 | multiple groups. | |
9988 | ||
9989 | d. Spelling correction is no longer enabled by default. | |
9990 | ||
9991 | e. Fixes to quoting problems in `bashbug'. | |
9992 | ||
9993 | f. OS-specific configuration changes were made for: Irix 6. | |
9994 | ||
9995 | g. OS-specific code changes were made for: QNX. | |
9996 | ||
9997 | h. A more meaningful message is now printed when the file in /tmp for a | |
9998 | here document cannot be created. | |
9999 | ||
10000 | i. Many changes to the shell's variable initialization code to speed | |
10001 | non-interactive startup. | |
10002 | ||
10003 | j. Changes to the non-job-control code so that it does not try to open | |
10004 | /dev/tty. | |
10005 | ||
10006 | k. The output of `set' and `export' is once again sorted, as POSIX wants. | |
10007 | ||
10008 | l. Fixed a problem caused by a recursive call reparsing the value of | |
10009 | $SHELLOPTS. | |
10010 | ||
10011 | m. The tilde code no longer calls getenv() when it's compiled as part of | |
10012 | the shell, which should eliminate problems on systems that cannot | |
10013 | redefine getenv(), like the NeXT OS. | |
10014 | ||
10015 | n. Fixed a problem that caused `bash -o' or `bash +o' to not list all | |
10016 | the shell options. | |
10017 | ||
10018 | o. Fixed `ulimit' to convert RLIM_INFINITY to the appropriate hard limit | |
10019 | only if the hard limit is greater than the current (soft) limit. | |
10020 | ||
10021 | p. Fixed a problem that arose when building bash in a different directory | |
10022 | than the source and y.tab.[ch] were remade with something other than | |
10023 | bison. This came up most often on NetBSD. | |
10024 | ||
10025 | q. Fixed a problem with completion -- it thought that `pwd`/[TAB] indicated | |
10026 | an unfinished command completion (`/), which generated errors. | |
10027 | ||
10028 | r. The bash special tilde expansions (~-, ~+) are now attempted before | |
10029 | calling the standard tilde expansion code, which should eliminate the | |
10030 | problems people have been seeing with this on Solaris 2.5.1. | |
10031 | ||
10032 | s. Added support for <stdarg.h> to places where it was missing. | |
10033 | ||
10034 | t. Changed the code that reads the output of a command substitution to not | |
10035 | go through stdio. This reduces the memory requirements and is faster. | |
10036 | ||
10037 | u. A number of changes to speed up export environment creation were made. | |
10038 | ||
10039 | v. A number of memory leaks were fixed as the result of running the test | |
10040 | scripts through Purify. | |
10041 | ||
10042 | w. Fixed a bug that caused subshells forked to interpret executable | |
10043 | scripts without a leading `#!' to not reinitialize the values of | |
10044 | the shell options. | |
10045 | ||
10046 | 2. Changes to Readline | |
10047 | ||
10048 | a. History library has less `#ifdef SHELL' code -- abstracted stuff out | |
10049 | into application-specific function hooks. | |
10050 | ||
10051 | b. Readline no longer calls getenv() if it's compiled as part of the shell, | |
10052 | which should eliminate problems on systems that cannot redefine getenv(), | |
10053 | like the NeXT OS. | |
10054 | ||
10055 | c. Fixed translation of ESC when `untranslating' macro values. | |
10056 | ||
10057 | d. The region kill operation now fixes the mark if it ends up beyond the | |
10058 | boundaries of the line after the region is deleted. | |
10059 | ||
10060 | 3. New Features in Bash | |
10061 | ||
10062 | a. New argument for `configure': `--with-curses'. This can be used to | |
10063 | override the selection of the termcap library on systems where it is | |
10064 | deficient. | |
10065 | ||
10066 | ------------------------------------------------------------------------------ | |
10067 | This document details the changes between this version, bash-2.01-alpha1, | |
10068 | and the previous version, bash-2.0-release. | |
10069 | ||
10070 | 1. Changes to Bash | |
10071 | ||
10072 | a. System-specific configuration changes for: FreeBSD, SunOS4, Irix, | |
10073 | MachTen, QNX 4.2, Harris Night Hawk, SunOS5. | |
10074 | ||
10075 | b. System-specific code changes were made for: Linux, 4.4 BSD, QNX 4.2, | |
10076 | HP-UX, AIX 4.2. | |
10077 | ||
10078 | c. A bug that caused the exec builtin to fail because the full pathname of | |
10079 | the command could not be found was fixed. | |
10080 | ||
10081 | d. The code that performs output redirections is now more resistant to | |
10082 | race conditions and possible security exploits. | |
10083 | ||
10084 | e. A bug that caused the shell to dump core when performing pattern | |
10085 | substitutions on variable values was fixed. | |
10086 | ||
10087 | f. More hosts are now recognized by the auto-configuration mechanism | |
10088 | (OpenBSD, QNX, others). | |
10089 | ||
10090 | g. Assignments to read-only variables that attempt to convert them to | |
10091 | arrays are now errors. | |
10092 | ||
10093 | h. A bug that caused shell scripts using array assignments in POSIX mode | |
10094 | to exit after the assignment was performed was fixed. | |
10095 | ||
10096 | i. The substring expansion code is now more careful about running off the | |
10097 | ends of the expanded variable value. | |
10098 | ||
10099 | j. A bug that caused completion to fail if a backquoted command substitution | |
10100 | appeared anywhere on the line was fixed. | |
10101 | ||
10102 | k. The `source' builtin no longer turns off history if it has been enabled | |
10103 | in a non-interactive shell. | |
10104 | ||
10105 | l. A bug that caused the shell to crash when `disown' was given a pid | |
10106 | instead of a job number was fixed. | |
10107 | ||
10108 | m. The `cd' spelling correction code will not try to change to `.' if no | |
10109 | directory entries match a single-character argument. | |
10110 | ||
10111 | n. A bad variable name supplied to `declare', `export', or `readonly' no | |
10112 | longer causes a non-interactive shell in POSIX mode to exit. | |
10113 | ||
10114 | o. Some fixes were made to the test suite to handle peculiarities of | |
10115 | various Unix versions. | |
10116 | ||
10117 | p. The bash completion code now quotes characters that readline would | |
10118 | treat as word breaks for completion but are not shell metacharacters. | |
10119 | ||
10120 | q. Bad options supplied at invocation now cause a usage message to be | |
10121 | displayed. | |
10122 | ||
10123 | r. Fixes were made to the code that handles DEBUG traps so that the trap | |
10124 | string is not freed inappropriately. | |
10125 | ||
10126 | s. Some changes were made to the bash debugger in examples/bashdb -- it | |
10127 | should be closer to working now. | |
10128 | ||
10129 | t. A problem that caused the default filename used for mail checking to be | |
10130 | wrong was fixed. | |
10131 | ||
10132 | u. A fix was made to the `echo' builtin so that NUL characters printed with | |
10133 | `echo -e' do not cause the output to be truncated. | |
10134 | ||
10135 | v. A fix was made to the job control code so that the shell behaves better | |
10136 | when monitor mode is enabled in a non-interactive shell. | |
10137 | ||
10138 | w. Bash no longer catches all of the terminating signals in a non- | |
10139 | interactive shell until a trap is set on EXIT, which should result in | |
10140 | quicker startup. | |
10141 | ||
10142 | x. A fix was made to the command timing code so that `time' can be used in | |
10143 | a loop. | |
10144 | ||
10145 | y. A fix was made to the parser so that `((cmd); cmd2)' is now parsed as | |
b72432fd | 10146 | a nested subshell rather than strictly as an (erroneous) arithmetic |
d166f048 JA |
10147 | command. |
10148 | ||
10149 | z. A fix was made to the globbing code so that it correctly matches quoted | |
10150 | filenames beginning with a `.'. | |
10151 | ||
10152 | aa. A bug in `fc' that caused some multi-line commands to not be stored as | |
10153 | one command in the history when they were re-executed after editing | |
10154 | (with `fc -e') was fixed. | |
10155 | ||
10156 | bb. The `ulimit' builtin now attempts to catch some classes of integer | |
10157 | overflows. | |
10158 | ||
10159 | cc. The command-oriented-history code no longer attempts to add `;' | |
10160 | inappropriately when a newline appears while reading a $(...) command | |
10161 | substitution. | |
10162 | ||
10163 | dd. A bug that caused the shell to dump core when `help --' was executed | |
10164 | was fixed. | |
10165 | ||
10166 | ee. A bug that caused the shell to crash when an unset variable appeared | |
10167 | in the body of a here document after `set -u' had been executed was | |
10168 | fixed. | |
10169 | ||
10170 | ff. Implicit input redirections from /dev/null for asynchronous commands | |
10171 | are now handled better. | |
10172 | ||
10173 | gg. A bug that caused the shell to fail to compile when configured with | |
10174 | `--disable-readline' was fixed. | |
10175 | ||
10176 | hh. The globbing code should now be interruptible. | |
10177 | ||
10178 | ii. Bash now notices when the `kill' builtin is used to send SIGCONT to a | |
10179 | stopped job and adjusts the data structures accordingly, as if `bg' had | |
10180 | been executed instead. | |
10181 | ||
10182 | jj. A bug that caused the shell to crash when mixing calls to `getopts' | |
10183 | and `shift' on the same set of positional parameters was fixed. | |
10184 | ||
10185 | kk. The command printing code now preserves the `-p' flag to `time'. | |
10186 | ||
10187 | ll. The command printing code now handles here documents better when there | |
10188 | are other redirections associated with the command. | |
10189 | ||
10190 | mm. The special glibc environment variable (NNN_GNU_nonoption_argv_flags_) | |
10191 | is no longer placed into the environment of executed commands -- users | |
10192 | of glibc had too many problems with it. | |
10193 | ||
10194 | nn. Reorganized the code that generates signames.h. The signal_names list | |
10195 | is now more complete but may be slightly different (SIGABRT is favored | |
10196 | over SIGIOT, for example). The preferred signal names are those | |
10197 | listed in the POSIX.2 standard. | |
10198 | ||
10199 | oo. `bashbug' now uses a filename shorter than 14 characters for its | |
10200 | temporary file, and asks for confirmation before sending the bug | |
10201 | report. | |
10202 | ||
10203 | pp. A bug that caused TAB completion in vi editing mode to not be turned | |
10204 | off when `set -o posix' was executed or back on when `set +o posix' | |
10205 | was executed was fixed. | |
10206 | ||
10207 | qq. A bug in the brace expansion code that caused brace expansions appearing | |
10208 | in new-style $(...) command substitutions to be inappropriately expanded | |
10209 | was fixed. | |
10210 | ||
10211 | rr. A bug in the readline hook shell-expand-line that could cause memory to | |
10212 | be inappropriately freed was fixed. | |
10213 | ||
10214 | ss. A bug that caused some arithmetic expressions containing `&&' and `||' | |
10215 | to be parsed with the wrong precedence has been fixed. | |
10216 | ||
10217 | tt. References to unbound variables after `set -u' has been executed now | |
10218 | cause the shell to exit immediately, as they should. | |
10219 | ||
10220 | uu. A bug that caused the shell to exit inappropriately when `set -e' had | |
10221 | been executed and a command's return status was being inverted with the | |
10222 | `!' reserved word was fixed. | |
10223 | ||
10224 | vv. A bug that could occasionally cause the shell to crash with a | |
10225 | divide-by-zero error when timing a command was fixed. | |
10226 | ||
10227 | ww. A bug that caused parameter pattern substitution to leave stray | |
10228 | backslashes in the replacement string when the expression is in | |
10229 | double quotes was fixed. | |
10230 | ||
10231 | xx. The `break' and `continue' builtins now break out of all loops when an | |
10232 | invalid count argument is supplied. | |
10233 | ||
10234 | yy. Fixed a bug that caused PATH to be set to the empty string if | |
10235 | `command -p' is executed with PATH unset. | |
10236 | ||
10237 | zz. Fixed `kill -l signum' to print the signal name without the `SIG' prefix, | |
10238 | as POSIX specifies. | |
10239 | ||
10240 | aaa. Fixed a bug that caused the shell to crash while setting $SHELLOPTS | |
10241 | if there were no shell options set. | |
10242 | ||
10243 | bbb. Fixed `export -p' and `readonly -p' so that when the shell is in POSIX | |
10244 | mode, their output is as POSIX.2 specifies. | |
10245 | ||
10246 | ccc. Fixed a bug in `readonly' so that `readonly -a avar=(...)' actually | |
10247 | creates an array variable. | |
10248 | ||
10249 | ddd. Fixed a bug that prevented `time' from correctly timing background | |
10250 | pipelines. | |
10251 | ||
10252 | 2. Changes to Readline | |
10253 | ||
10254 | a. A bug that caused an extra newline to be printed when the cursor was on | |
10255 | an otherwise empty line was fixed. | |
10256 | ||
10257 | b. An instance of memory being used after it was freed was corrected. | |
10258 | ||
10259 | c. The redisplay code now works when the prompt is longer than the screen | |
10260 | width. | |
10261 | ||
10262 | d. `dump-macros' is now a bindable name, as it should have been all along. | |
10263 | ||
10264 | e. Non-printable characters are now expanded when displaying macros and | |
10265 | their values. | |
10266 | ||
10267 | f. The `dump-variables' and `dump-macros' commands now output a leading | |
10268 | newline if they're called as the result of a key sequence, rather | |
10269 | than directly by an application. | |
10270 | ||
10271 | 3. New Features in Bash | |
10272 | ||
10273 | a. There is a new builtin array variable: GROUPS, the set of groups to which | |
10274 | the user belongs. This is used by the test suite. | |
10275 | ||
10276 | 4. New Features in Readline | |
10277 | ||
10278 | a. If a key sequence bound to `universal-argument' is read while reading a | |
10279 | numeric argument started with `universal-argument', it terminates the | |
10280 | argument but is otherwise ignored. This provides a way to insert multiple | |
10281 | instances of a digit string, and is how GNU emacs does it. | |
10282 | ||
10283 | ------------------------------------------------------------------------------ | |
ccc6cda3 JA |
10284 | This document details the changes between this version, bash-2.0-release, |
10285 | and the previous version, bash-2.0-beta3. | |
10286 | ||
10287 | 1. Changes to Bash | |
10288 | ||
10289 | a. Fix to the `getopts' builtin so that it does the right thing when a | |
10290 | required option argument is not present. | |
10291 | ||
10292 | b. The completion code now updates the common prefix of matched names | |
10293 | after FIGNORE processing is done, since any names that were removed | |
10294 | may have changed the common prefix. | |
10295 | ||
10296 | c. Fixed a bug that made messages in MAILPATH entries not work correctly. | |
10297 | ||
10298 | d. Fixed a serious documentation error in the description of the new | |
10299 | ${parameter:offset[:length]} expansion. | |
10300 | ||
10301 | e. Fixes to make parameter substring expansion ({$param:offset[:length]}) | |
10302 | work when within double quotes. | |
10303 | ||
10304 | f. Fixes to make ^A (CTLESC) survive an unquoted expansion of positional | |
10305 | parameters. | |
10306 | ||
10307 | g. Corrected a misspelling of `unlimited' in the output of `ulimit'. | |
10308 | ||
10309 | h. Fixed a bug that caused executable scripts without a leading `#!' to | |
10310 | occasionally pick up the wrong set of positional parameters. | |
10311 | ||
10312 | i. Linux systems now have a working `ulimit -v', using RLIMIT_AS. | |
10313 | ||
10314 | j. Updated config.guess so that many more machine types are recognized. | |
10315 | ||
10316 | k. Fixed a bug with backslash-quoted slashes in the ${param/pat[/sub]} | |
10317 | expansion. | |
10318 | ||
10319 | l. If the shell is named `-su', and `-c command' is supplied, read and | |
10320 | execute the login shell startup files even though the shell is not | |
10321 | interactive. This is to support the `-' option to `su'. | |
10322 | ||
10323 | m. Fixed a bug that caused core dumps when the DEBUG trap was ignored | |
10324 | with `trap "" DEBUG' and a shell function was subsequently executed. | |
10325 | ||
10326 | n. Fixed a bug that caused core dumps in the read builtin when IFS was | |
10327 | set to the null string and the input had leading whitespace. | |
10328 | ||
10329 | 2. Changes to Readline | |
10330 | ||
10331 | a. Fixed a bug that caused a numeric argument of 1024 to be ignored when | |
10332 | inserting text. | |
10333 | ||
10334 | b. Fixed the display code so that the numeric argument is displayed as it's | |
10335 | being entered. | |
10336 | ||
10337 | c. Fixed the numeric argument reading code so that `M-- command' is | |
10338 | equivalent to `M--1 command', as the prompt implies. | |
10339 | ||
10340 | 3. New Features in Bash | |
10341 | ||
10342 | a. `ulimit' now sets both hard and soft limits and reports the soft limit | |
10343 | by default (when neither -H nor -S is specified). This is compatible | |
10344 | with versions of sh and ksh that implement `ulimit'. | |
10345 | ||
10346 | b. Integer constants have been extended to base 64. | |
10347 | ||
10348 | 4. New Features in Readline | |
10349 | ||
10350 | a. The `home' and `end' keys are now bound to beginning-of-line and | |
10351 | end-of-line, respectively, if the corresponding termcap capabilities | |
10352 | are present. | |
10353 | ||
10354 | ------------------------------------------------------------------------------ | |
10355 | This document details the changes between this version, bash-2.0-beta3, | |
10356 | and the previous version, bash-2.0-beta2. | |
10357 | ||
10358 | 1. Changes to Bash | |
10359 | ||
10360 | a. System-specific changes for: AIX 4.2, SCO 3.2v[45], HP-UX. | |
10361 | ||
10362 | b. When in POSIX mode, variable assignments preceding a special builtin | |
10363 | persist in the shell environment after the builtin completes. | |
10364 | ||
10365 | c. Changed all calls to getwd() to getcwd(). Improved check for systems | |
10366 | where the libc getcwd() calls popen(), since that breaks on some | |
10367 | systems when job control is being used. | |
10368 | ||
10369 | d. Fixed a bug that caused seg faults when executing scripts with the | |
10370 | execute bit set but without a leading `#!'. | |
10371 | ||
10372 | e. The environment passed to executed commands is never sorted. | |
10373 | ||
10374 | f. A bug was fixed in the code that expands ${name[@]} to the number of | |
10375 | elements in an array variable. | |
10376 | ||
10377 | g. A bug was fixed in the array compound assignment code ( A=( ... ) ). | |
10378 | ||
10379 | h. Window size changes now correctly propagate down to readline if | |
10380 | the shopt `checkwinsize' option is enabled. | |
10381 | ||
10382 | i. A fix was made in the code that expands to the length of a variable | |
10383 | value (${#var}). | |
10384 | ||
10385 | j. A fix was made to the command builtin so that it did not turn on the | |
10386 | `no fork' flag inappropriately. | |
10387 | ||
10388 | k. A fix was made to make `set -n' work more reliably. | |
10389 | ||
10390 | l. A fix was made to the job control initialization code so that the | |
10391 | terminal process group is set to the shell's process group if the | |
10392 | shell changes its own process group. | |
10393 | ||
10394 | 2. Changes to Readline | |
10395 | ||
10396 | a. System-specific changes for: SCO 3.2v[45]. | |
10397 | ||
10398 | b. The behavior of the vi-mode `.' when redoing an `i' command was changed | |
10399 | to insert the text previously inserted by the `i' command rather than | |
10400 | simply entering insert mode. | |
10401 | ||
10402 | 3. New features in Bash | |
10403 | ||
10404 | a. There is a new version of the autoload function package, in | |
10405 | examples/functions/autoload.v2, that uses arrays and provides more | |
10406 | functionality. | |
10407 | ||
10408 | b. Support for LC_COLLATE and locale-specific sorting of the results of | |
10409 | pathname expansion if strcoll() is available. | |
10410 | ||
10411 | 4. New Features in Readline | |
10412 | ||
10413 | a. Support for locale-specific sorting of completion possibilities if | |
10414 | strcoll() is available. | |
10415 | ||
10416 | ------------------------------------------------------------------------------ | |
10417 | This document details the changes between this version, bash-2.0-beta2, | |
10418 | and the previous version, bash-2.0-beta1. | |
10419 | ||
10420 | 1. Changes to Bash | |
10421 | ||
10422 | a. `pushd -' is once again equivalent to `pushd $OLDPWD'. | |
10423 | ||
10424 | b. OS-specific changes for: SCO 3.2v[45]. | |
10425 | ||
10426 | c. A change was made to the fix for the recently-reported security hole | |
10427 | when reading characters with octal value 255 to make it work better on | |
10428 | systems with restartable system calls when not using readline. | |
10429 | ||
10430 | d. Some changes were made to the test suite so that it works if you | |
10431 | configure bash with --enable-usg-echo-default. | |
10432 | ||
10433 | e. A fix was made to the parsing of conditional arithmetic expressions. | |
10434 | ||
10435 | f. Illegal arithmetic bases now cause an arithmetic evaluation error rather | |
10436 | than being silently reset. | |
10437 | ||
10438 | g. Multiple arithmetic bases now cause an arithmetic evaluation error | |
10439 | instead of being ignored. | |
10440 | ||
10441 | h. A fix was made to the evaluation of ${param?word} to conform to POSIX.2. | |
10442 | ||
10443 | i. A bug that sometimes caused array indices to be evaluated twice (which | |
10444 | would cause errors when they contained assignment statements) was fixed. | |
10445 | ||
10446 | j. `ulimit' was rewritten to avoid problems with getrlimit(2) returning | |
10447 | unsigned values and to simplify the code. | |
10448 | ||
10449 | k. A bug in the command-oriented-history code that caused it to sometimes | |
10450 | put semicolons after right parens inappropriately was fixed. | |
10451 | ||
10452 | l. The values inserted into the prompt by the \w and \W escape sequences | |
10453 | are now quoted to prevent further expansion. | |
10454 | ||
10455 | m. An interactive shell invoked as `sh' now reads and executes commands | |
10456 | from the file named by $ENV when it starts up. If it's a login shell, | |
10457 | it does this after reading /etc/profile and ~/.profile. | |
10458 | ||
10459 | n. The file named by $ENV is never read by non-interactive shells. | |
10460 | ||
10461 | 2. Changes to Readline | |
10462 | ||
10463 | a. A few changes were made to hide some macros and functions that should not | |
10464 | be public. | |
10465 | ||
10466 | b. An off-by-one error that caused seg faults in the history expansion code | |
10467 | was fixed. | |
10468 | ||
10469 | 3. New Features in Bash | |
10470 | ||
10471 | a. The ksh-style ((...)) arithmetic command was implemented. It is exactly | |
10472 | identical to let "...". This is controlled by a new option to configure, | |
10473 | `--enable-dparen-arithmetic', which is on by default. | |
10474 | ||
10475 | b. There is a new #define available in config.h.top: SYS_BASH_LOGOUT. If | |
10476 | defined to a filename, bash reads and executes commands from that file | |
10477 | when a login shell exits. It's commented out by default. | |
10478 | ||
10479 | c. `ulimit' has a `-l' option that reports the maximum amount of data that | |
10480 | may be locked into memory on 4.4BSD-based systems. | |
10481 | ||
10482 | ------------------------------------------------------------------------------ | |
10483 | This document details the changes between this version, bash-2.0-beta1, | |
10484 | and the previous version, bash-2.0-alpha4. | |
10485 | ||
10486 | 1. Changes to Bash | |
10487 | ||
10488 | a. A bug that sometimes caused traps to be ignored on signals the | |
10489 | shell treats specially was fixed. | |
10490 | ||
10491 | b. The internationalization code was changed to track the values of | |
10492 | LC_* variables and call setlocale() as appropriate. The TEXTDOMAIN | |
10493 | and TEXTDOMAINDIR variables are also tracked; changes cause calls | |
10494 | to textdomain() and bindtextdomain(), if available. | |
10495 | ||
10496 | c. A bug was fixed that sometimes caused double-quoted strings to be | |
10497 | parsed incorrectly. | |
10498 | ||
10499 | d. Changes were made so that the siglist code compiles correctly on | |
10500 | Solaris 2.5. | |
10501 | ||
10502 | e. Added `:' to the set of characters that cause word breaks for the | |
10503 | completion code so that pathnames in assignments to $PATH can be | |
10504 | completed. | |
10505 | ||
10506 | f. The `select' command was fixed to print $PS3 to stderr. | |
10507 | ||
10508 | g. Fixed an error in the manual page section describing the effect that | |
10509 | setting and unsetting GLOBIGNORE has on the setting of the `dotglob' | |
10510 | option. | |
10511 | ||
10512 | h. The time conversion code now uses CLK_TCK rather than CLOCKS_PER_SEC | |
10513 | on systems without gettimeofday() and resources. | |
10514 | ||
10515 | i. The getopt static variables are now initialized each time a subshell | |
10516 | is started, so subshells using `getopts' work right. | |
10517 | ||
10518 | j. A sign-extension bug that caused a possible security hole was fixed. | |
10519 | ||
10520 | k. The parser now reads characters between backquotes within a double- | |
10521 | quoted string as a single word, so double quotes in the backquoted | |
10522 | string don't terminate the enclosing double-quoted string. | |
10523 | ||
10524 | l. A bug that caused `^O' to work incorrectly when typed as the first | |
10525 | thing to an interactive shell was fixed. | |
10526 | ||
10527 | m. A rarely-exercised off-by-one error in the code that quotes variable | |
10528 | values was fixed. | |
10529 | ||
10530 | n. Some memory and file descriptor leaks encountered when running a | |
10531 | shell script that is executable but does not have a leading `#!' | |
10532 | were plugged. | |
10533 | ||
10534 | 2. Changes to Readline | |
10535 | ||
10536 | a. A bug that sometimes caused incorrect results when trying to read | |
10537 | typeahead on systems without FIONREAD was fixed. | |
10538 | ||
10539 | 3. New Features in Bash | |
10540 | ||
10541 | a. The command timing code now uses the value of the TIMEFORMAT variable | |
10542 | to format and display timing statistics. | |
10543 | ||
10544 | b. The `time' reserved word now accepts a `-p' option to force the | |
10545 | POSIX.2 output format. | |
10546 | ||
10547 | c. There are a couple of new and updated scripts to convert csh startup | |
10548 | files to bash format. | |
10549 | ||
10550 | d. There is a new builtin array variable: BASH_VERSINFO. The various | |
10551 | members hold the parts of the version information in BASH_VERSION, | |
10552 | plus the value of MACHTYPE. | |
10553 | ||
10554 | 4. New Features in Readline | |
10555 | ||
10556 | a. Setting LANG to `en_US.ISO8859-1' now causes readline to enter | |
10557 | eight-bit mode. | |
10558 | ||
10559 | ------------------------------------------------------------------------------ | |
10560 | This document details the changes between this version, bash-2.0-alpha4, | |
10561 | and the previous version, bash-2.0-alpha3. | |
10562 | ||
10563 | 1. Changes to Bash | |
10564 | ||
10565 | a. There is better detection of rsh connections on Solaris 2. | |
10566 | ||
10567 | b. Assignments to read-only variables preceding a command name are now | |
10568 | variable assignment errors. Variable assignment errors cause | |
10569 | non-interactive shells running in posix mode to exit. | |
10570 | ||
10571 | c. The word tokenizer was rewritten to handle nested quotes and pairs | |
10572 | ('', "", ``, ${...}, $(...), $[...], $'...', $"...", <(...), >(...)) | |
10573 | correctly. Some of the parameter expansion code was updated as a | |
10574 | consequence. | |
10575 | ||
10576 | d. A fix was made to `test' when given three arguments so that a binary | |
10577 | operator is checked for first, before checking that the first argument | |
10578 | is `!'. | |
10579 | ||
10580 | e. 2''>/dev/null is no longer equivalent to 2>/dev/null. | |
10581 | ||
10582 | f. Parser error messages were regularized, and in most cases the name of | |
10583 | the shell script being read by a non-interactive shell is not printed | |
10584 | twice. | |
10585 | ||
10586 | g. A fix was made to the completion code so that it no longer removes the | |
10587 | text the user typed in some cases. | |
10588 | ||
10589 | h. The special glibc `getopt' environment variable is no longer put into | |
10590 | the environment on machines with small values of ARG_MAX. | |
10591 | ||
10592 | i. The expansion of ${...} now follows the POSIX.2 rules for finding the | |
10593 | closing `}'. | |
10594 | ||
10595 | j. The shell no longer displays spurious status messages for background | |
10596 | jobs in shell scripts that complete successfully when the script is | |
10597 | run from a terminal. | |
10598 | ||
10599 | k. `shopt -o' now correctly updates $SHELLOPTS. | |
10600 | ||
10601 | l. A bug that caused the $PATH searching code to return a non-executable | |
10602 | file even when an executable file with the same name appeared later in | |
10603 | $PATH was fixed. | |
10604 | ||
10605 | m. The shell now does tilde expansions on unquoted `:~' in assignment | |
10606 | statements when not in posix mode. | |
10607 | ||
10608 | n. Variable assignment errors when a command consists only of assignments | |
10609 | now cause non-interactive shells to exit when in posix mode. | |
10610 | ||
10611 | o. If the variable in a `for' or `select' command is read-only, or not a | |
10612 | legal shell identifier, a variable assignment error occurs. | |
10613 | ||
10614 | p. `test' now handles `-a' and `-o' as binary operators when three arguments | |
10615 | are supplied, and correctly parses `( word )' as equivalent to `word'. | |
10616 | ||
10617 | q. `test' was fixed so that file names of the form /dev/fd/NN mean the same | |
10618 | thing on all systems, even Linux. | |
10619 | ||
10620 | r. Fixed a bug in the globbing code that caused patterns with multiple | |
10621 | consecutive `*'s to not be matched correctly. | |
10622 | ||
10623 | s. Fixed a bug that caused $PS2 to not be printed when an interactive shell | |
10624 | not using readline is reading a here document. | |
10625 | ||
10626 | t. Fixed a bug that caused history expansion to be performed inappropriately | |
10627 | when a single-quoted string spanned more than one line. | |
10628 | ||
10629 | u. `getopts' now checks that the variable name passed by the user as the | |
10630 | second argument is a legal shell identifier and that the variable is | |
10631 | not read-only. | |
10632 | ||
10633 | v. Fixed `getopts' to obey POSIX.2 rules for setting $OPTIND when it | |
10634 | encounters an error. | |
10635 | ||
10636 | w. Fixed `set' to display variable values in a form that can be re-read. | |
10637 | ||
10638 | x. Fixed a bug in the code that keeps track of whether or not local variables | |
10639 | have been declared at the current level of function nesting. | |
10640 | ||
10641 | y. Non-interactive shells in posix mode now exit if the name in a function | |
10642 | declaration is not a legal identifier. | |
10643 | ||
10644 | z. The job control code now ignores stopped children when the shell is not | |
10645 | interactive. | |
10646 | ||
10647 | aa. The `cd' builtin no longer attempts spelling correction on the directory | |
10648 | name if the shell is not interactive, regardless of the setting of the | |
10649 | `cdspell' option. | |
10650 | ||
10651 | bb. Some OS-specific changes were made for SCO 3.2v[45] and AIX 4.2. | |
10652 | ||
10653 | cc. `time' now prints its output to stderr, as POSIX.2 specifies. | |
10654 | ||
10655 | 2. Fixes to Readline | |
10656 | ||
10657 | a. After printing possible completions, all lines of a multi-line prompt | |
10658 | are redisplayed. | |
10659 | ||
10660 | b. Some changes were made to the terminal handling code in rltty.c to | |
10661 | work around AIX 4.2 bugs. | |
10662 | ||
10663 | 3. New Features in Bash | |
10664 | ||
10665 | a. There is a new loadable builtin: sprintf, with calling syntax | |
10666 | sprintf var format [args] | |
10667 | This provides an easy way to simulate ksh left- and right-justified | |
10668 | variable values. | |
10669 | ||
10670 | b. The expansions of \h and \H in prompt strings were swapped. \h now | |
10671 | expands to the hostname up to the first `.', as in bash-1.14. | |
10672 | ||
10673 | 4. New Features in Readline | |
10674 | ||
10675 | a. The bash-1.14 behavior when ^M is typed while doing an incremental | |
10676 | search was restored. ^J may now be used to terminate the search without | |
10677 | accepting the line. | |
10678 | ||
10679 | b. There is a new bindable variable: disable-completion. This inhibits | |
10680 | word completion and causes the completion character to be inserted as | |
10681 | if it had been bound to self-insert. | |
10682 | ||
10683 | ------------------------------------------------------------------------------ | |
10684 | This document details the changes between this version, bash-2.0-alpha3, | |
10685 | and the previous version, bash-2.0-alpha2. | |
10686 | ||
10687 | There is now a file `COMPAT' included in the distribution that lists the | |
10688 | user-visible incompatibilities between 1.14 and 2.0. | |
10689 | ||
10690 | 1. Changes to Bash | |
10691 | ||
10692 | a. Some work was done so that word splitting of the rhs of assignment | |
10693 | statements conforms more closely to historical practice. | |
10694 | ||
10695 | b. A couple of errant memory frees were fixed. | |
10696 | ||
10697 | c. A fix was made to the test builtin so it recognizes `<' and `>' as | |
10698 | binary operators. | |
10699 | ||
10700 | d. The GNU malloc in lib/malloc/malloc.c now scrambles memory as it's | |
10701 | allocated and freed. This is to catch callers that refer to freed | |
10702 | memory or assume something about newly-allocated memory. | |
10703 | ||
10704 | e. Fixed a problem with conversion to 12-hour time in the prompt | |
10705 | expansion code. | |
10706 | ||
10707 | f. Fixed a problem with configure's argument parsing order. Now you can | |
10708 | correctly turn on specific options after using --enable-minimal-config. | |
10709 | ||
10710 | g. The configure script now automatically disables the use of GNU malloc | |
10711 | on systems where it's appropriate (better than having people read the | |
10712 | NOTES file and do it manually). | |
10713 | ||
10714 | h. There are new prompt expansions (\v and \V) to insert version information | |
10715 | into the prompt strings. | |
10716 | ||
10717 | i. The default prompt string now includes the version number. | |
10718 | ||
10719 | j. Most of the builtins that take no options were changed to use the | |
10720 | internal getopt so they can produce proper error messages for -? | |
10721 | and incorrect options. | |
10722 | ||
10723 | k. Some system-specific changes were made for SVR4.2 and Solaris 2.5. | |
10724 | ||
10725 | l. Bash now uses PATH_MAX instead of MAXPATHLEN and NAME_MAX instead of | |
10726 | MAXNAMLEN. | |
10727 | ||
10728 | m. A couple of problems caused by uninitialized variables were fixed. | |
10729 | ||
10730 | n. There are a number of new loadable builtin examples: logname, basename, | |
10731 | dirname, tty, pathchk, tee, head, and rmdir. All of these conform to | |
10732 | POSIX.2. | |
10733 | ||
10734 | o. Bash now notices changes in TZ and calls tzset() if present, so | |
10735 | changing TZ will alter the time printed by prompt expansions. | |
10736 | ||
10737 | p. The source was reorganized a bit so I don't have to wait so long for | |
10738 | some files to compile, and to facilitate the creation of a `shell | |
10739 | library' at some future point. | |
10740 | ||
10741 | q. Bash no longer turns off job control if called as `sh', since the | |
10742 | POSIX.2 spec includes job control as a standard feature. | |
10743 | ||
10744 | r. `bash -o posix' now works as intended. | |
10745 | ||
10746 | s. Fixed a problem with the completion code: when completing a filename | |
10747 | that contained globbing characters, if show-all-if-ambiguous was set, | |
10748 | the completion code would remove the user's text. | |
10749 | ||
10750 | t. Fixed ulimit so that (hopefully) the full range of limits is available | |
10751 | on HPUX systems. | |
10752 | ||
10753 | u. A new `shopt' option (`hostcomplete') enables and disables hostname | |
10754 | completion. | |
10755 | ||
10756 | v. The shell no longer attempts to save the history on an abort(), | |
10757 | which is usually called by programming_error(). | |
10758 | ||
10759 | w. The `-s' option to `fc' was changed to echo the command to be executed | |
10760 | to stderr instead of stdout. | |
10761 | ||
10762 | x. If the editor invoked by `fc -e' exits with a non-zero status, no | |
10763 | commands are executed. | |
10764 | ||
10765 | y. Fixed a bug that made the shopt `histverify' option work incorrectly. | |
10766 | ||
10767 | z. There is a new variable `MACHTYPE' whose value is the GNU-style | |
10768 | `cpu-company-system' system description as set by configure. (The | |
10769 | values of MACHTYPE and HOSTTYPE should really be swapped.) | |
10770 | ||
10771 | aa. The `ulimit' builtin now allows the maximum virtual memory size to be | |
10772 | set via setrlimit(2) if RLIMIT_VMEM is defined. | |
10773 | ||
10774 | bb. `bash -nc 'command'' no longer runs `command'. | |
10775 | ||
10776 | 2. Changes to Readline | |
10777 | ||
10778 | a. Fixed a typo in the code that checked for FIONREAD in input.c. | |
10779 | ||
10780 | b. Fixed a bug in the code that outputs keybindings, so things like C-\ | |
10781 | are quoted properly. | |
10782 | ||
10783 | c. Fixed a bug in the inputrc file parsing code to handle the problems | |
10784 | caused by inputrc files created from the output of `bind -p' in | |
10785 | previous versions of bash. The problem was due to the bug fixed | |
10786 | in item b above. | |
10787 | ||
10788 | d. Readline no longer turns off the terminal's meta key, and turns it on | |
10789 | once the first time it's called. | |
10790 | ||
10791 | ------------------------------------------------------------------------------ | |
10792 | This file documents the changes between this version, bash-2.0-alpha2, | |
10793 | and the previous version, bash-2.0-alpha. | |
10794 | ||
10795 | 1. Changes to Bash | |
10796 | ||
10797 | a. The shell no longer thinks directories are executable. | |
10798 | ||
10799 | b. `disown' has a new option, `h', which inhibits the resending of SIGHUP | |
10800 | but does not remove the job from the jobs table. | |
10801 | ||
10802 | c. The varargs functions in error.c now use ANSI-C `stdarg' if available. | |
10803 | ||
10804 | d. The build process now treats the `build version' in .build as local to | |
10805 | the build directory, so different versions built from the same source | |
10806 | tree have different `build versions'. | |
10807 | ||
10808 | e. Some problems with the grammar have been fixed. (It used `list' in a few | |
10809 | productions where `compound_list' was needed. A `list' must be terminated | |
10810 | with a newline or semicolon; a `compound_list' need not be.) | |
10811 | ||
10812 | f. A fix was made to keep `wait' from hanging when waiting for all background | |
10813 | jobs. | |
10814 | ||
10815 | g. `bash --help' now writes its output to stdout, like the GNU Coding Standards | |
10816 | specify, and includes the machine type (the value of MACHTYPE). | |
10817 | ||
10818 | h. `bash --version' now prints more information and exits successfully, like | |
10819 | the GNU Coding Standards specify. | |
10820 | ||
10821 | i. The output of `time' and `times' now prints fractional seconds with three | |
10822 | places after the decimal point. | |
10823 | ||
10824 | j. A bug that caused process substitutions to screw up the pipeline printed | |
10825 | by `jobs' was fixed. | |
10826 | ||
10827 | k. Fixes were made to the code that implements $'...' and $"..." so they | |
10828 | work as documented. | |
10829 | ||
10830 | l. The process substitution code now opens named pipes for reading with | |
10831 | O_NONBLOCK to avoid hanging. | |
10832 | ||
10833 | m. Fixes were made to the trap code so the shell cleans up correctly if the | |
10834 | trap command contains a `return' and we're executing a function or | |
10835 | sourcing a script with `.'. | |
10836 | ||
10837 | n. Fixes to doc/Makefile.in so that it doesn't try to remake all of the | |
10838 | documentation (ps, dvi, etc.) on a `make install'. | |
10839 | ||
10840 | o. Fixed an auto-increment error that caused bash -c args to sometimes dump | |
10841 | core. | |
10842 | ||
10843 | p. Fixed a bug that caused $HISTIGNORE to fail when the history line | |
10844 | contained globbing characters. | |
10845 | ||
10846 | 2. Changes to Readline | |
10847 | ||
10848 | a. There is a new string variable, rl_library_version, available for use by | |
10849 | applications. The current value is "2.1". | |
10850 | ||
10851 | b. A bug encountered when expand-tilde was enabled and file completion was | |
10852 | attempted on a word beginning with `~/' was fixed. | |
10853 | ||
10854 | c. A slight change was made to the incremental search termination behavior. | |
10855 | ESC still terminates the search, but if input is pending or arrives | |
10856 | within 0.1 seconds (on systems with select(2)), it is used as a prefix | |
8868edaf | 10857 | character. This is intended to allow users to terminate searches with |
ccc6cda3 | 10858 | the arrow keys and get the behavior they expect. |