]>
Commit | Line | Data |
---|---|---|
8868edaf CR |
1 | This document details the changes between this version, bash-5.1-rc3, and |
2 | the previous version, bash-5.1-rc2. | |
3 | ||
4 | 1. Changes to Bash | |
5 | ||
6 | a. The `assoc_expand_once' option now affects the evaluation of the -v primary | |
7 | to test and the [[ compound command. | |
8 | ||
9 | 2. Changes to Readline | |
10 | ||
11 | a. Fixed a bug that could cause point to be set beyond the end of the line | |
12 | buffer when aborting an incremental search. | |
13 | ||
14 | 3. New Features in Bash | |
15 | ||
16 | 4. New Features in Readline | |
17 | ||
18 | ------------------------------------------------------------------------------ | |
19 | This document details the changes between this version, bash-5.1-rc2, and | |
20 | the previous version, bash-5.1-rc1. | |
21 | ||
22 | 1. Changes to Bash | |
23 | ||
24 | a. Process substitutions started from an interactive shell no longer have their | |
25 | standard input implicitly redirected from /dev/null. | |
26 | ||
27 | b. Fixed an issue with setting the SIGINT trap handler in an interactive shell | |
28 | when temporarily running $PROMPT_COMMAND non-interactively. | |
29 | ||
30 | 2. Changes to Readline | |
31 | ||
32 | a. Terminals that are named "dumb" or unknown do not enable bracketed paste | |
33 | by default. | |
34 | ||
35 | b. Ensure that disabling bracketed paste turns off highlighting the incremental | |
36 | search string when the search is successful. | |
37 | ||
38 | 3. New Features in Bash | |
39 | ||
40 | 4. New Features in Readline | |
41 | ||
42 | ------------------------------------------------------------------------------ | |
43 | This document details the changes between this version, bash-5.1-rc1, and | |
44 | the previous version, bash-5.1-beta. | |
45 | ||
46 | 1. Changes to Bash | |
47 | ||
48 | a. Fixed an inconsistency in the way HISTCMD is calculated when it's expanded | |
49 | during a multi-line command. | |
50 | ||
51 | b. Modified the change to here-document expansion containing backslash-quoted | |
52 | double quotes. | |
53 | ||
54 | c. Fixed a case where the shells's exit status could be greater than 255. | |
55 | ||
56 | d. Modified changed to process substitution so the executed command has its | |
57 | stdin redirected from /dev/null if it was previously interactive and | |
58 | reading commands from the terminal. | |
59 | ||
60 | 2. New Features in Bash | |
61 | ||
62 | a. There is a new contributed loadable builtin: asort. | |
63 | ||
64 | 3. Changes to Readline | |
65 | ||
66 | a. Fixed a bug that could cause an application with an application-specific | |
67 | redisplay function to crash if the line data structures had not been | |
68 | initialized. | |
69 | ||
70 | 4. New Features in Readline | |
71 | ||
72 | ------------------------------------------------------------------------------ | |
73 | This document details the changes between this version, bash-5.1-beta, and | |
74 | the previous version, bash-5.1-alpha. | |
75 | ||
76 | 1. Changes to Bash | |
77 | ||
78 | a. Fixed a bug that caused name references to variables to not update the | |
79 | referenced variable's assignment side effects. | |
80 | ||
81 | b. Tightened up the parameter transformation error checking for invalid | |
82 | transformation operators. | |
83 | ||
84 | c. System-specific changes for: FreeBSD | |
85 | ||
86 | d. A few minor changes to move potential uses of stdio functions out of signal | |
87 | handling paths. | |
88 | ||
89 | e. Make sure SIGCHLD is blocked in all cases where waitchld() is not called | |
90 | from a signal handler. | |
91 | ||
92 | f. Changed `command' builtin processing so it no longer starts an extra process | |
93 | when run asynchronously (command x &). | |
94 | ||
95 | g. Avoid performing tilde expansion after `:' in words that look like assignment | |
96 | statements when in posix mode. | |
97 | ||
98 | h. Slight changes to how the `complete' builtin prints out options and actions | |
99 | for completion specifications. | |
100 | ||
101 | i. Several changes to how `local -' restores the values of options and | |
102 | $SHELLOPTS. | |
103 | ||
104 | j. Don't treat a word in a compound assignment as an assignment statement | |
105 | unless it has a valid subscript before the `='. | |
106 | ||
107 | k. Fixed a bug with the DEBUG trap and process substitution that caused the | |
108 | terminal's process group to be set incorrectly. | |
109 | ||
110 | l. Fixed a bug that left readline's signal handlers installed while running a | |
111 | shell command from a bindable readline command. | |
112 | ||
113 | m. Fixed the `fc' builtin to clamp out of range history specifications at the | |
114 | boundaries of the history list for POSIX conformance. | |
115 | ||
116 | n. Fixed a bug that caused ${foo@a} to treat foo as an unset variable if it | |
117 | was an array without a value for subscript 0/"0" but had other set | |
118 | elements. | |
119 | ||
120 | o. Fixed a bug that caused the history code to attempt to parse command | |
121 | substitutions looking for shell comments before adding them to the history, | |
122 | even while parsing here-documents. | |
123 | ||
124 | p. Fixed a bug that could cause a syntax error in a command read by `eval' to | |
125 | exit an interactive shell. | |
126 | ||
127 | 2. New Features in Bash | |
128 | ||
129 | a. If the hash builtin is listing hashed filenames portably, don't print | |
130 | anything if the table is empty. | |
131 | ||
132 | b. GLOBIGNORE now ignores `.' and `..' as a terminal pathname component. | |
133 | ||
134 | c. Bash attempts to optimize away forks in the last command in a function body | |
135 | under appropriate circumstances. | |
136 | ||
137 | d. The globbing code now uses fnmatch(3) to check collation elements (if | |
138 | available) even in cases without multibyte characters. | |
139 | ||
140 | e. The `fg' and `bg' builtins now return an error in a command substitution | |
141 | when asked to restart a job inherited from the parent shell. | |
142 | ||
143 | f. The shell now attempts to unlink all FIFOs on exit, whether a consuming | |
144 | process has finished with them or not. | |
145 | ||
146 | 3. Changes to Readline | |
147 | ||
148 | a. Make sure that all undo groups are closed when leaving vi insertion mode. | |
149 | ||
150 | b. Make sure that the vi-mode `C' and `c' commands enter insert mode even if | |
151 | the motion command doesn't have any effect. | |
152 | ||
153 | c. Fixed several potential memory leaks in the callback mode context handling. | |
154 | ||
155 | d. If readline is handling a SIGTTOU, make sure SIGTTOU is blocked while | |
156 | executing the terminal cleanup code, since it's no longer run in a signal | |
157 | handling context. | |
158 | ||
159 | 4. New Features in Readline | |
160 | ||
161 | a. The signal cleanup code now blocks SIGINT while processing after a SIGINT. | |
162 | ||
163 | ------------------------------------------------------------------------------ | |
164 | This document details the changes between this version, bash-5.1-alpha, and | |
165 | the previous version, bash-5.0-release. | |
166 | ||
167 | 1. Changes to Bash | |
168 | ||
169 | a. Fixed a bug that caused a posix-mode shell to not exit if the return builtin | |
170 | was executed outside a function or dot script. | |
171 | ||
172 | b. Fixed a bug where `declare +f' could potentially turn off the function | |
173 | attribute. | |
174 | ||
175 | c. Restored bash-4.4 pathname expansion behavior when a word to be expanded had | |
176 | only backslashes, not any of the other globbing characters. This came after | |
177 | an extensive POSIX group discussion (interp #1234). | |
178 | ||
179 | d. There are more changes to avoid performing word expansions multiple times on | |
180 | arithmetic expressions. | |
181 | ||
182 | e. Fixed a bug with alias expansion when the alias ends with a TAB. | |
183 | ||
184 | f. Fixed a bug that caused programmable completion to return an error if the | |
185 | shell function name supplied as an argument to `complete -F' was invalid. | |
186 | ||
187 | g. There are several fixes to buffer overflows found as the result of fuzzing | |
188 | with random input. | |
189 | ||
190 | h. Fixed a bug that caused the edit-and-execute-command editing command to | |
191 | start with the previous history line if invoked on an empty line. | |
192 | ||
193 | i. Fixed a bug that potentially caused `bind --help' to change readline's | |
194 | output stream. | |
195 | ||
196 | j. Turning off posix mode now restores the vi-insertion mode binding for TAB | |
197 | that was in effect when posix mode was enabled. | |
198 | ||
199 | k. Restore the previous state of job control being enabled if `exec' fails in | |
200 | an interactive shell. | |
201 | ||
202 | l. Fixed a bug that caused the terminal's process group to be set incorrectly | |
203 | if job control was turned off before starting an interactive shell. | |
204 | ||
205 | m. Fixed a bug that caused a crash when HISTSIZE=0. | |
206 | ||
207 | n. Fixed a word expansion bug that caused null strings on the rhs of expansions | |
208 | to be discarded incorrectly. | |
209 | ||
210 | o. History list management does a better job of handling the situation where | |
211 | the number of history entries from the current shell session is greater than | |
212 | the number of entries in the history list. | |
213 | ||
214 | p. Fixed a bug that caused the `fc' builtin to attempt to dereference a newly- | |
215 | freed history entry. | |
216 | ||
217 | q. Fixed a bug that made the `Q' variable transformation not work well with | |
218 | `set -u'. | |
219 | ||
220 | r. There are several word expansion fixes for expanding $* and $@ in contexts | |
221 | where word splitting is not going to be performed, since each positional | |
222 | parameter must expand to a separate word. | |
223 | ||
224 | s. Fixed a bug that could cause ^D to exit bash immediately even if there were | |
225 | stopped jobs. | |
226 | ||
227 | t. Fixed a bug with double-quoting and backslash-quoting strings containing | |
228 | multibyte characters for reuse. | |
229 | ||
230 | u. Fixed a bug that caused the line number to be reported incorrectly if the | |
231 | shell executed a (command) subshell. | |
232 | ||
233 | v. Fixed a bug that caused the shell to fail to reap process substitutions | |
234 | when they went out of scope, which had unpredictable results. | |
235 | ||
236 | w. Fixed a bug that caused null strings in arguments to [[ conditional command | |
237 | operators to compare incorrectly. | |
238 | ||
239 | x. Changed the behavior of `wait' without arguments to only wait for background | |
240 | processes the current shell instance started, not background children it may | |
241 | have inherited. | |
242 | ||
243 | y. Fixed a bug that could cause command substitution to leave file descriptors | |
244 | open if the shell received many SIGINTs. | |
245 | ||
246 | z. Bash now behaves better if the `**' filename expansion operator encounters a | |
247 | symbolic link to a directory, avoiding more cases where it might return | |
248 | duplicate pathnames. | |
249 | ||
250 | aa. Programmable completion now canonicalizes directory names in the same way | |
251 | as bash word completion, so `..' is handled consistently. | |
252 | ||
253 | bb. Fixed a bug when using RETURN as the delimiter to the read builtin; it | |
254 | caused readline to set the binding for RETURN incorrectly. | |
255 | ||
256 | cc. Fixed a bug that caused `history -d' to delay printing an out-of-range | |
257 | error message. | |
258 | ||
259 | dd. Fixed a bug with `bash -c command' where `command' ends with an expanded | |
260 | alias. | |
261 | ||
262 | ee. Fixed a bug that could result in `history -n' adding spurious line feeds to | |
263 | commands in the history list. | |
264 | ||
265 | ff. The $RANDOM random number generator now XORs the top and bottom halves of | |
266 | the internal 32-bit value to introduce more randomness. Setting the shell | |
267 | compatibility level to 50 or lower undoes this. | |
268 | ||
269 | gg. Fixed several problems caused by running the DEBUG trap on simple commands | |
270 | executed as part of a pipeline. | |
271 | ||
272 | ii. Fixed a bug that didn't allow `bind -r' to remove the binding for \C-@. | |
273 | ||
274 | jj. Several fixes to the bash-backward-shellword bindable readline command to | |
275 | behave better when at the last character on the line. | |
276 | ||
277 | kk. If `set -x' is enabled, bash doesn't print a command twice if it's run by | |
278 | the `command' builtin. | |
279 | ||
280 | ll. Fixed a bug with printing function definitions containing here documents. | |
281 | ||
282 | mm. Fixed a bug that could cause the `bind' builtin to set $? to -1. | |
283 | ||
284 | nn. Fixed a bug that didn't reset the timezone information correctly when the | |
285 | TZ variable was unset. | |
286 | ||
287 | oo. Fixed several issues with assigning an associative array variable using a | |
288 | compound assignment that expands the value of the same variable. | |
289 | ||
290 | pp. Fixed several places where the shell set $? without setting PIPESTATUS. | |
291 | ||
292 | qq. Fixed a problem with glob bracket expressions containing invalid character | |
293 | classes, collating symbols, or equivalence classes -- they should not | |
294 | require a closing right bracket. | |
295 | ||
296 | rr. Fixed a bug where running a builtin in a subshell did not run the EXIT trap. | |
297 | ||
298 | ss. Fixed several problems with posix-mode variable assignments preceding | |
299 | shell function calls and posix special builtins, so that they create and | |
300 | modify variables at the current scope. | |
301 | ||
302 | tt. Fix history initialization so `bash +o history' works as expected. | |
303 | ||
304 | uu. Fixed a bug in the bindable edit-and-execute-command command that could | |
305 | interfere with the shell's parsing state. | |
306 | ||
307 | vv. Fixed an issue with nested traps running command substitutions in command | |
308 | lines with command substitutions. | |
309 | ||
310 | ww. Fixed a bug with globbing pathnames that contain invalid multibyte | |
311 | characters (sequences that don't correspond to a character in the current | |
312 | locale). | |
313 | ||
314 | xx. Fixed a bug that caused the shell not to exit if a function definition | |
315 | failed while errexit was enabled. | |
316 | ||
317 | yy. Process substitution processes now get their input from /dev/null, since | |
318 | they are asynchronous, not interactive, and not jobs. | |
319 | ||
320 | zz. Setting nocaseglob no longer turns on case-insensitive regexp matching. | |
321 | ||
322 | aaa. Fixed a bug that resulted in extra blank lines being added to some history | |
323 | entries containing here-documents. | |
324 | ||
325 | bbb. Fixed a bug that resulted in incorrect matching of some patterns in word | |
326 | expansion if they expanded to the empty string. | |
327 | ||
328 | ccc. Fixed here-string expansion so it behaves the same as expansion of the | |
329 | rhs of an assignment statement. | |
330 | ||
331 | ddd. Changed here-document parsing to no longer allow the end of the here | |
332 | document to delimit a command substitution. | |
333 | ||
334 | eee. Several fixes to history expansion: multiple :p modifiers work, a ^ word | |
335 | designator works as part of a range, and a `-' is treated as part of a | |
336 | search string if it immediately follows a `!'. | |
337 | ||
338 | fff. Fixed a bug in pattern substitution with null matches in a string | |
339 | containing multibyte characters. | |
340 | ||
341 | ggg. Unbinding a key sequence bound with `bind -x' now removes the key sequence | |
342 | from the additional keymap `bind -x' uses. | |
343 | ||
344 | hhh. Fixed a bug with command start detection for completion so that it doesn't | |
345 | mistake brace expansion for the start of a command. | |
346 | ||
347 | iii. Fixed a bug that caused local variables with the same name as variables | |
348 | appearing in a function's temporary environment to not be marked as local. | |
349 | ||
350 | jjj. Fixed a bug that could cause SIGCHLD to be blocked when executing return | |
351 | or exec in the rightmost pipeline element with lastpipe enabled. | |
352 | ||
353 | kkk. Fixed a bug that could result in commands without the execute bit set | |
354 | being added to the command hash table. | |
355 | ||
356 | lll. Fixed a bug that allowed non-digits to follow the `#' in a `base#number' | |
357 | integer constant. | |
358 | ||
359 | mmm. Fixed a bug that made `time -- command' attempt to execute `--'. | |
360 | ||
361 | nnn. Fixed a couple of bugs with variable transformation using arrays | |
362 | subscripted with `*' or `@'. | |
363 | ||
364 | ooo. A failure to create a variable using `declare' in a function no longer | |
365 | causes the function to return immediately. | |
366 | ||
367 | ppp. Fixed a bug that could cause the := word expansion to add a non-null | |
368 | value if attempting to assign a null string when double-quoted. | |
369 | ||
370 | qqq. Fixed a bug that could cause backslashes quoting double quotes in here | |
371 | document bodies to not be removed when expanding the body. | |
372 | ||
373 | rrr. Fixed a bug that caused commands following a subshell while the shell is | |
374 | reading input from stdin but not interactive, while job control is | |
375 | enabled, to be executed twice. | |
376 | ||
377 | sss. Fixed a bug where receiving SIGTERM from a different process while | |
378 | readline was active could cause the shell to terminate. | |
379 | ||
380 | ttt. In posix mode, running a trap after the read builtin now sees the exit | |
381 | status of the read builtin (e.g., 130 after a SIGINT) in $?. | |
382 | ||
383 | uuu. Fixed a bug with nameref variables referencing array subscripts used in | |
384 | arithmetic expressions. | |
385 | ||
386 | vvv. Fixed a bug that caused the pipeline process group id to be reset in the | |
387 | middle of a command list run by a shell started to run a command | |
388 | substitution. | |
389 | ||
390 | www. Restricted shells can no longer read and write history files with pathnames | |
391 | containing slashes. | |
392 | ||
393 | xxx. Fixed a couple of problems with 0 and -0 used as arguments to `fc' when | |
394 | not listing commands from the history. | |
395 | ||
396 | yyy. When `test' is supplied four or more arguments, treat an argument that | |
397 | looks like an operator (e.g., -e), but is in a place where only a string | |
398 | is valid, as a string, as it would be when using the POSIX rules, instead | |
399 | of an operator with a missing argument. | |
400 | ||
401 | zzz. There is no `compat50' shopt option. Changes to the shell compatibility | |
402 | level should use the BASH_COMPAT variable. | |
403 | ||
404 | aaaa. Redirection failures with compound commands are now treated as errors | |
405 | that cause the shell to exit if `errexit' is enabled. | |
406 | ||
407 | bbbb. Redirection failure error messages no longer expand the word in the | |
408 | redirection again. | |
409 | ||
410 | cccc. History expansion is no longer performed while parsing a here-document | |
411 | inside a command substitution. | |
412 | ||
413 | 2. Changes to Readline | |
414 | ||
415 | a. There are a number of fixes that were found as the result of fuzzing with | |
416 | random input. | |
417 | ||
418 | b. Changed the revert-all-at-newline behavior to make sure to start at the end | |
419 | of the history list when doing it, instead of the line where the user hit | |
420 | return. | |
421 | ||
422 | c. When parsing `set' commands from the inputrc file or an application, readline | |
423 | now allows trailing whitespace. | |
424 | ||
425 | d. Fixed a bug that left a file descriptor open to the history file if the | |
426 | file size was 0. | |
427 | ||
428 | e. Fixed a problem with binding key sequences containing meta characters. | |
429 | ||
430 | f. Fixed a bug that caused the wrong line to be displayed if the user tried to | |
431 | move back beyond the beginning of the history list, or forward past the end | |
432 | of the history list. | |
433 | ||
434 | g. If readline catches SIGTSTP, it now sets a hook that allows the calling | |
435 | application to handle it if it desires. | |
436 | ||
437 | h. Fixed a redisplay problem with a prompt string containing embedded newlines. | |
438 | ||
439 | i. Fixed a problem with completing filenames containing invalid multibyte | |
440 | sequences when case-insensitive comparisons are enabled. | |
441 | ||
442 | j. Fixed a redisplay problem with prompt strings containing invisible multibyte | |
443 | characters. | |
444 | ||
445 | k. Fixed a problem with multibyte characters mapped to editing commands that | |
446 | modify the search string in incremental search. | |
447 | ||
448 | l. Fixed a bug with maintaining the key sequence while resolving a bound | |
449 | command in the presence of ambiguous sequences (sequences with a common | |
450 | prefix), in most cases while attempting to unbind it. | |
451 | ||
452 | m. Fixed several buffer overflows found as the result of fuzzing. | |
453 | ||
454 | n. Reworked backslash handling when translating key sequences for key binding | |
455 | to be more uniform and consistent, which introduces a slight backwards | |
456 | incompatibility. | |
457 | ||
458 | o. Fixed a bug with saving the history that resulted in errors not being | |
459 | propagated to the calling application when the history file is not writable. | |
460 | ||
461 | p. Readline only calls chown(2) on a newly-written history file if it really | |
462 | needs to, instead of having it be a no-op. | |
463 | ||
464 | q. Readline now behaves better when operate-and-get-next is used when the | |
465 | history list is `full': when there are already $HISTSIZE entries. | |
466 | ||
467 | r. Fixed a bug that could cause vi redo (`.') of a replace command not to work | |
468 | correctly in the C or POSIX locale. | |
469 | ||
470 | s. Fixed a bug with vi-mode digit arguments that caused the last command to be | |
471 | set incorrectly. This prevents yank-last-arg from working as intended, for | |
472 | example. | |
473 | ||
474 | 3. New Features in Bash | |
475 | ||
476 | a. `bind -x' now supports different bindings for different editing modes and | |
477 | keymaps. | |
478 | ||
479 | b. Bash attempts to optimize the number of times it forks when executing | |
480 | commands in subshells and from `bash -c'. | |
481 | ||
482 | c. Here documents and here strings now use pipes for the expanded document if | |
483 | it's smaller than the pipe buffer size, reverting to temporary files if it's | |
484 | larger. | |
485 | ||
486 | d. There are new loadable builtins: mktemp, accept, mkfifo, csv, cut/lcut | |
487 | ||
488 | e. In posix mode, `trap -p' now displays signals whose disposition is SIG_DFL | |
489 | and those that were SIG_IGN when the shell starts. | |
490 | ||
491 | f. The shell now expands the history number (e.g., in PS1) even if it is not | |
492 | currently saving commands to the history list. | |
493 | ||
494 | g. `read -e' may now be used with arbitrary file descriptors (`read -u N'). | |
495 | ||
496 | h. The `select' builtin now runs traps if its internal call to the read builtin | |
497 | is interrupted by a signal. | |
498 | ||
499 | i. SRANDOM: a new variable that expands to a 32-bit random number that is not | |
500 | produced by an LCRNG, and uses getrandom/getentropy, falling back to | |
501 | /dev/urandom or arc4random if available. There is a fallback generator if | |
502 | none of these are available. | |
503 | ||
504 | j. shell-transpose-words: a new bindable readline command that uses the same | |
505 | definition of word as shell-forward-word, etc. | |
506 | ||
507 | k. The shell now adds default bindings for shell-forward-word, | |
508 | shell-backward-word, shell-transpose-words, and shell-kill-word. | |
509 | ||
510 | l. Bash now allows ARGV0 appearing in the initial shell environment to set $0. | |
511 | ||
512 | m. If `unset' is executed without option arguments, bash tries to unset a shell | |
513 | function if a name argument cannot be a shell variable name because it's not | |
514 | an identifier. | |
515 | ||
516 | n. The `test -N' operator uses nanosecond timestamp granularity if it's | |
517 | available. | |
518 | ||
519 | o. Bash posix mode now treats assignment statements preceding shell function | |
520 | definitions the same as in its default mode, since POSIX has changed and | |
521 | no longer requires those assignments to persist after the function returns | |
522 | (POSIX interp 654). | |
523 | ||
524 | p. BASH_REMATCH is no longer readonly. | |
525 | ||
526 | q. wait: has a new -p VARNAME option, which stores the PID returned by `wait -n' | |
527 | or `wait' without arguments. | |
528 | ||
529 | r. Sorting the results of pathname expansion now uses byte-by-byte comparisons | |
530 | if two strings collate equally to impose a total order; the result of a | |
531 | POSIX interpretation (#963 and #1070). | |
532 | ||
533 | s. Bash now allows SIGINT trap handlers to execute recursively. | |
534 | ||
535 | t. Bash now saves and restores state around setting and unsetting posix mode, | |
536 | instead of having unsetting posix mode set a known state. | |
537 | ||
538 | u. Process substitution is now available in posix mode. | |
539 | ||
540 | v. READLINE_MARK: a new variable available while executing commands bound with | |
541 | `bind -x', contains the value of the mark. | |
542 | ||
543 | w. Bash removes SIGCHLD from the set of blocked signals if it's blocked at shell | |
544 | startup. | |
545 | ||
546 | x. `test -v N' can now test whether or not positional parameter N is set. | |
547 | ||
548 | y. `local' now honors the `-p' option to display all local variables at the | |
549 | current context. | |
550 | ||
551 | z. The `@a' variable transformation now prints attributes for unset array | |
552 | variables. | |
553 | ||
554 | aa. The `@A' variable transformation now prints a declare command that sets a | |
555 | variable's attributes if the variable has attributes but is unset. | |
556 | ||
557 | bb. `declare' and `local' now have a -I option that inherits attributes and | |
558 | value from a variable with the same name at a previous scope. | |
559 | ||
560 | cc. When run from a -c command, `jobs' now reports the status of completed jobs. | |
561 | ||
562 | dd. New `U', `u', and `L' parameter transformations to convert to uppercase, | |
563 | convert first character to uppercase, and convert to lowercase, | |
564 | respectively. | |
565 | ||
566 | ee. PROMPT_COMMAND: can now be an array variable, each element of which can | |
567 | contain a command to be executed like a string PROMPT_COMMAND variable. | |
568 | ||
569 | ff. `ulimit' has a -R option to report and set the RLIMIT_RTTIME resource. | |
570 | ||
571 | gg. Associative arrays may be assigned using a list of key-value pairs within | |
572 | a compound assignment. Compound assignments where the words are not of | |
573 | the form [key]=value are assumed to be key-value assignments. A missing or | |
574 | empty key is an error; a missing value is treated as NULL. Assignments may | |
575 | not mix the two forms. | |
576 | ||
577 | hh. New `K' parameter transformation to display associative arrays as key- | |
578 | value pairs. | |
579 | ||
580 | ii. Writing history to syslog now handles messages longer than the syslog max | |
581 | length by writing multiple messages with a sequence number. | |
582 | ||
583 | jj. SECONDS and RANDOM may now be assigned using arithmetic expressions, since | |
584 | they are nominally integer variables. LINENO is not an integer variable. | |
585 | ||
586 | kk. Bash temporarily suppresses the verbose option when running the DEBUG trap | |
587 | while running a command from the `fc' builtin. | |
588 | ||
589 | ll. `wait -n' now accepts a list of job specifications as arguments and will | |
590 | wait for the first one in the list to change state. | |
591 | ||
592 | mm. The associative array implementation can now dynamically increase the | |
593 | size of the hash table based on insertion patterns. | |
594 | ||
595 | nn. HISTFILE is now readonly in a restricted shell. | |
596 | ||
597 | oo. The bash malloc now returns memory that is 16-byte aligned on 64-bit | |
598 | systems. | |
599 | ||
600 | 4. New Features in Readline | |
601 | ||
602 | a. If a second consecutive completion attempt produces matches where the first | |
603 | did not, treat it as a new completion attempt and insert a match as | |
604 | appropriate. | |
605 | ||
606 | b. Bracketed paste mode works in more places: incremental search strings, vi | |
607 | overstrike mode, character search, and reading numeric arguments. | |
608 | ||
609 | c. Readline automatically switches to horizontal scrolling if the terminal has | |
610 | only one line. | |
611 | ||
612 | d. Unbinding all key sequences bound to a particular readline function now | |
613 | descends into keymaps for multi-key sequences. | |
614 | ||
615 | e. rl-clear-display: new bindable command that clears the screen and, if | |
616 | possible, the scrollback buffer (bound to emacs mode M-C-l by default). | |
617 | ||
618 | f. New active mark and face feature: when enabled, it will highlight the text | |
619 | inserted by a bracketed paste (the `active region') and the text found by | |
620 | incremental and non-incremental history searches. This is tied to bracketed | |
621 | paste and can be disabled by turning off bracketed paste. | |
622 | ||
623 | g. Readline sets the mark in several additional commands. | |
624 | ||
625 | h. Bracketed paste mode is enabled by default. | |
626 | ||
627 | i. Readline tries to take advantage of the more regular structure of UTF-8 | |
628 | characters to identify the beginning and end of characters when moving | |
629 | through the line buffer. | |
630 | ||
631 | j. The bindable operate-and-get-next command (and its default bindings) are | |
632 | now part of readline instead of a bash-specific addition. | |
633 | ||
634 | ------------------------------------------------------------------------------ | |
d233b485 CR |
635 | This document details the changes between this version, bash-5.0-release, and |
636 | the previous version, bash-5.0-rc1. | |
637 | ||
638 | 1. Changes to Bash | |
639 | ||
640 | a. Tilde expansion isn't performed on indexed array subscripts, even for | |
641 | backwards compatibility. | |
642 | ||
643 | b. The shell doesn't exit in posix mode if the eval builtin gets a parse | |
644 | error when run by the command builtin. | |
645 | ||
646 | c. Fixed a bug that caused a shell comment in an alias to not find the end | |
647 | of the alias properly. | |
648 | ||
649 | d. Reverted a change from April, 2018 that caused strings containing | |
650 | backslashes to be flagged as glob patterns. | |
651 | ||
652 | 2. Changes to Readline | |
653 | ||
654 | 3. New Features in Bash | |
655 | ||
656 | 4. New Features in Readline | |
657 | ||
658 | ------------------------------------------------------------------------------ | |
659 | This document details the changes between this version, bash-5.0-rc1, and | |
660 | the previous version, bash-5.0-beta2. | |
661 | ||
662 | 1. Changes to Bash | |
663 | ||
664 | a. Fix to initial word completion detection code. | |
665 | ||
666 | b. Fixed a bug that caused issues with assignment statements containing ^A in | |
667 | the value assigned when IFS contains ^A. | |
668 | ||
669 | c. Added a fallback to fnmatch() when strcoll can't correctly deal with | |
670 | bracket expression character equivalence classes. | |
671 | ||
672 | d. Fixed a bug that caused $BASH_COMMAND to contain the trap handler command | |
673 | when running a trap handler containing [[ or (( commands. | |
674 | ||
675 | e. Fixed a bug that caused nameref assignments in the temporary environment | |
676 | to potentially create variables with invalid names. | |
677 | ||
678 | f. Fixed a bug that caused `local -' to turn off alias expansion in scripts. | |
679 | ||
680 | g. Fixed a parser issue with a command string containing EOF after an invalid | |
681 | command as an argument to a special builtin not causing a posix-mode shell | |
682 | to exit. | |
683 | ||
684 | h. Made a slight change to the FNV-1 string hash algorithm used for associative | |
685 | arrays (corrected the initial seed). | |
686 | ||
687 | 2. Changes to Readline | |
688 | ||
689 | 3. New Features in Bash | |
690 | ||
691 | a. The `select' command now supports command forms without a word list | |
692 | following `in'. | |
693 | ||
694 | 4. New Features in Readline | |
695 | ||
696 | ------------------------------------------------------------------------------ | |
697 | This document details the changes between this version, bash-5.0-beta2, and | |
698 | the previous version, bash-5.0-beta. | |
699 | ||
700 | 1. Changes to Bash | |
701 | ||
702 | a. Fixed a bug that could cause a seg fault while parsing a subshell command | |
703 | inside a command substitution. | |
704 | ||
705 | b. Fixed several small memory leaks uncovered by coverity. | |
706 | ||
707 | c. Fixed a problem with command substitution inside an interactive shell that | |
708 | could cause the parent to receive a SIGHUP. | |
709 | ||
710 | d. Fixed a problem with using `*' and `@' as subscripts when assigning values | |
711 | to an associative array with assoc_expand_once enabled. | |
712 | ||
713 | e. Fixed a bug that could cause a huge memory allocation when completing a | |
714 | word beginning with an invalid tilde expansion. | |
715 | ||
8868edaf | 716 | f. Cleaned up some incompatibilities with bash-4.4 when expanding indexed array |
d233b485 CR |
717 | subscripts used in arithmetic expansions when assoc_expand_once is enabled. |
718 | ||
719 | g. The ${parameter@a} expansion will display attributes even if `parameter' is | |
720 | unset. | |
721 | ||
722 | h. Fixed a bug that caused the output of `set' to cut off some variables before | |
723 | printing the value. | |
724 | ||
725 | i. Treat a failure to assign a variable when using the ${x:=value} expansion | |
726 | as an expansion error, so non-interactive posix-mode shells exit | |
727 | ||
728 | j. Fixed a problem when expanding $* in a context where word splitting is not | |
729 | performed when IFS is NULL. | |
730 | ||
731 | k. Temp files used to store here documents are forced readable, no matter what | |
732 | the user's umask says. | |
733 | ||
734 | l. Fixed a problem where an interrupted brace expansion could cause the shell | |
735 | to attempt to free an invalid memory location. | |
736 | ||
737 | m. Make sure to check for any terminating signals after running a trap | |
738 | handler; don't wait until the next time we process traps. | |
739 | ||
740 | n. Fixed a bug that caused "return" to act like a special builtin with respect | |
741 | to variable assignments even when preceded by "command". | |
742 | ||
743 | o. POSIX-mode shells now return failure if the cd builtin fails due to the | |
744 | absolute directory name being longer than PATH_MAX, instead of trying | |
745 | again with a relative pathname. | |
746 | ||
747 | p. Fixed a problem with FUNCNAME occasionally being visible when not executing | |
748 | a shell function. | |
749 | ||
750 | q. Fixed a problem with the expansions performed on the WORD in the case | |
751 | command. | |
752 | ||
753 | r. Fixed a slight POSIX compatibility when removing "IFS whitespace" during | |
754 | word splitting and the read builtin. | |
755 | ||
756 | s. Fixed a problem with expanding an array with subscript `*' when all the | |
757 | elements expand to the empty string, and making sure the expansion honors | |
758 | the `:' specifier. | |
759 | ||
760 | 2. Changes to Readline | |
761 | ||
762 | a. Fixed a bug with adding multibyte characters to an incremental search string. | |
763 | ||
764 | b. Fixed a bug with redoing text insertions in vi mode. | |
765 | ||
766 | c. Fixed a bug with pasting text into an incremental search string if bracketed | |
767 | paste mode is enabled. ESC cannot be one of the incremental search | |
768 | terminator characters for this to work. | |
769 | ||
770 | d. Fixed a bug with anchored search patterns when performing searches in vi | |
771 | mode. | |
772 | ||
773 | 3. New Features in Bash | |
774 | ||
775 | a. Associative and indexed arrays now allow subscripts consisting solely of | |
776 | whitespace. | |
777 | ||
778 | b. `checkwinsize' is now enabled by default. | |
779 | ||
780 | c. The `localvar_unset' shopt option is now visible and documented. | |
781 | ||
782 | d. The `progcomp_alias' shopt option is now visible and documented. | |
783 | ||
784 | e. The signal name processing code now understands `SIGRTMIN+n' all the way | |
785 | up to SIGRTMAX. | |
786 | ||
787 | f. There is a new `seq' loadable builtin. | |
788 | ||
789 | g. Trap execution now honors the (internal) max invocations of `eval', since | |
790 | traps are supposed to be executed as if using `eval'. | |
791 | ||
792 | h. The $_ variable doesn't change when the shell executes a command that forks. | |
793 | ||
794 | i. The `kill' builtin now supports -sSIGNAME and -nSIGNUM, even though | |
795 | conforming applications aren't supposed to use them. | |
796 | ||
797 | j. POSIX mode now enables the `shift_verbose' option. | |
798 | ||
799 | 4. New Features in Readline | |
800 | ||
801 | a. Readline now allows application-defined keymap names; there is a new public | |
802 | function, rl_set_keymap_name(), to do that. | |
803 | ||
804 | b. The "Insert" keypad key, if available, now puts readline into overwrite | |
805 | mode. | |
806 | ||
807 | ------------------------------------------------------------------------------ | |
808 | This document details the changes between this version, bash-5.0-beta, and | |
809 | the previous version, bash-5.0-alpha. | |
810 | ||
811 | 1. Changes to Bash | |
812 | ||
813 | a. Fixed a bug that allowed subshells to "inherit" enclosing loops -- this | |
814 | is where POSIX says the subshell is not "enclosed" by the loop. | |
815 | ||
816 | b. Added more UTF-8-specific versions of multibyte functions, and optimized | |
817 | existing functions if the current locale uses UTF-8 encoding. | |
818 | ||
819 | c. In POSIX mode, assignments preceding regular builtins should not persist | |
820 | when the builtin completes. | |
821 | ||
822 | d. Added additional checks to special array assignment (e.g., BASH_ALIASES) | |
823 | so it can't be used to bypass validity checks performed in other places. | |
824 | ||
825 | e. The `!!' history expansion now refers to the previous history entry as | |
826 | expected, even if used on the second or subsequent line of a multi-line | |
827 | history entry. | |
828 | ||
829 | f. Fixed a bug that could cause the shell to dereference a NULL pointer if | |
830 | the environment (`environ') is set to NULL. | |
831 | ||
832 | g. Bash uses slightly better integer overflow handling for brace sequence | |
833 | expansion on systems where ints are 32 bits and intmax_t is 64 bits. | |
834 | ||
835 | h. Fixed a bug setting attributes for a variable named as an argument to | |
836 | `declare' that also appears as a nameref in the temporary environment. | |
837 | ||
838 | i. Fixed several bugs that could cause assignments to namerefs to create | |
839 | variables with invalid names. | |
840 | ||
841 | j. Fixed a bug that could result in the SIGINT handler being set incorrectly | |
842 | in asynchronous subshells. | |
843 | ||
844 | k. Fixed a bug that could cause `bash -t' to not execute the specified command. | |
845 | ||
846 | l. Fixed several bugs that caused the shell to operate on the wrong variable | |
847 | when using namerefs with the same name as a global variable in shell | |
848 | functions. | |
849 | ||
850 | m. Internal changes to how the shell handles variables with invalid names in | |
851 | the initial environment and to prevent variables with invalid names from | |
852 | being added to the environment instead of passing them on to children. | |
853 | ||
854 | n. Changes to make sure that an expansion that results in a quoted null string | |
855 | is reflected in the expansion, even if the word expands to nothing. | |
856 | ||
857 | o. Changes to make sure that $* and ${array[*]} (and $@/${array[@]}) expand | |
858 | the same way after the recent changes for POSIX interpretation 888. | |
859 | ||
860 | p. Saving and restoring the positional parameters at function entry and exit | |
861 | is considerably more efficient; noticeably so when there are large numbers | |
862 | of positional parameters. | |
863 | ||
864 | q. Fixed a bug that caused `lastpipe' and `pipefail' to return an incorrect | |
865 | status for the pipeline if there was more than one external command in a | |
866 | loop body appearing in the last pipeline element. | |
867 | ||
868 | r. Fixed a bug that caused value conversion errors with the printf builtin's | |
869 | %u and %f conversion specifications and invalid constants. | |
870 | ||
871 | 2. Changes to Readline | |
872 | ||
873 | a. Added more UTF-8-specific versions of multibyte functions, and optimized | |
874 | existing functions if the current locale uses UTF-8 encoding. | |
875 | ||
876 | b. Fixed a problem with bracketed-paste inserting more than one character and | |
877 | interacting with other readline functions. | |
878 | ||
879 | c. Fixed a bug that caused the history library to attempt to append a history | |
880 | line to a non-existent history entry. | |
881 | ||
882 | d. If using bracketed paste mode, output a newline after the \r that is the | |
883 | last character of the mode disable string to avoid overwriting output. | |
884 | ||
885 | e. Fixes to the vi-mode `b', `B', `w', `W', `e', and `E' commands to better | |
886 | handle multibyte characters. | |
887 | ||
888 | f. Fixed a redisplay problem that caused an extra newline to be generated on | |
889 | accept-line when the line length is exactly the screenwidth. | |
890 | ||
891 | 3. New Features in Bash | |
892 | ||
893 | a. Bash no longer allows variable assignments preceding a special builtin that | |
894 | changes variable attributes to propagate back to the calling environment | |
895 | unless the compatibility level is 44 or lower. | |
896 | ||
897 | b. You can set the default value for $HISTSIZE at build time in config-top.h. | |
898 | ||
899 | c. The `complete' builtin now accepts a -I option that applies the completion | |
900 | to the initial word on the line. | |
901 | ||
902 | d. The internal bash malloc now uses mmap (if available) to satisfy requests | |
903 | greater than 128K bytes, so free can use mfree to return the pages to the | |
904 | kernel. | |
905 | ||
906 | e. The shell doesn't automatically set BASH_ARGC and BASH_ARGV at startup | |
907 | unless it's in debugging mode, as the documentation has always said, but | |
908 | will dynamically create them if a script references them at the top level | |
909 | without having enabled debugging mode. | |
910 | ||
911 | f. The localvar_inherit option will not attempt to inherit a value from a | |
912 | variable of an incompatible type (indexed vs. associative arrays, for | |
913 | example). | |
914 | ||
915 | g. The `globasciiranges' option is now enabled by default; it can be set to | |
916 | off by default at configuration time. | |
917 | ||
918 | 4. New Features in Readline | |
919 | ||
920 | a. The history expansion library now understands command and process | |
921 | substitution and extended globbing and allows them to appear anywhere in a | |
922 | word. | |
923 | ||
924 | b. The history library has a new variable that allows applications to set the | |
925 | initial quoting state, so quoting state can be inherited from a previous | |
926 | line. | |
927 | ||
928 | ------------------------------------------------------------------------------ | |
929 | This document details the changes between this version, bash-5.0-alpha, and | |
930 | the previous version, bash-4.4-release. | |
931 | ||
932 | 1. Changes to Bash | |
933 | ||
934 | a. Fixed a bug that could cause traps in background jobs to give the terminal | |
935 | to the wrong process group. | |
936 | ||
937 | b. Fixed a bug that caused `kill -l 0' to print an out-of-range error. | |
938 | ||
939 | c. Fixed a problem that could result in here-documents being displayed in | |
940 | the wrong order. | |
941 | ||
942 | d. Fixed a number of out-of-bounds and free memory read errors found via | |
943 | fuzzing. | |
944 | ||
945 | e. Fixed a subshell inheritance problem that could cause a subshell to wait for | |
946 | the wrong process. | |
947 | ||
948 | f. Fixed a bug that caused SHLVL to be incremented one too many times when | |
949 | creating subshells. | |
950 | ||
951 | g. A job dying due to SIGINT can now interrupt sourcing a file in a shell with | |
952 | job control enabled. | |
953 | ||
954 | h. Fixed a spurious warning about unterminated ${ or $( constructs during | |
955 | word completion. | |
956 | ||
957 | i. The shell no longer runs traps if a signal arrives while reading command | |
958 | substitution output. | |
959 | ||
960 | j. Fixed an arithmetic expansion error that could allow ++var++ as valid | |
961 | syntax. | |
962 | ||
963 | k. Fixed an error that allowed out-of-bounds references to the directory stack. | |
964 | ||
965 | l. The shell does a better job of saving multi-line history entries with | |
966 | embedded comments. | |
967 | ||
968 | m. Fixed a bug that could cause quoted bracket expressions in regular expression | |
969 | arguments to `[[' to not match correctly. | |
970 | ||
971 | n. Fixed a bug that could cause an IFS character in a word to result in an | |
972 | extra '\001' character in the expansion. | |
973 | ||
974 | o. A trailing backslash in a glob pattern can match a trailing backslash in the | |
975 | string. | |
976 | ||
977 | p. Fixed a memory leak in the process creation code path when job control is | |
978 | enabled. | |
979 | ||
980 | q. Fixed a bug that caused `printf' to output broken surrogate pairs for | |
981 | Japanese locales. | |
982 | ||
983 | r. Fixed a bug that caused a SIGINT generated from `kill' in a dot script to | |
984 | kill an interactive shell. | |
985 | ||
986 | s. Fixed a bug that could cause the `read' builtin to not fully read a | |
987 | multibyte character. | |
988 | ||
989 | t. Fixed a bug that could cause identifiers to be evaluated in conditional | |
990 | arithmetic expressions even when evaluation is suppressed. | |
991 | ||
992 | u. Fixed a bug that could result in command substitution, when executed in a | |
993 | context where word splitting is not performed, to leave a stray '\001' | |
994 | character in the string. | |
995 | ||
996 | v. Fixed a bug that could cause history expansion to be disabled in a non- | |
997 | interactive shell even if `-o histexpand' is supplied at startup. | |
998 | ||
999 | w. Fixed a bug that caused `read -N' to strip leading whitespace IFS characters. | |
1000 | ||
1001 | x. Fixed a bug that caused spurious tilde expansion in arithmetic expressions. | |
1002 | ||
1003 | y. If indirect expansion attempts to indirectly reference through an unset | |
1004 | variable, report an error. | |
1005 | ||
1006 | z. Added a guard to prevent the shell from looping while receiving an endless | |
1007 | stream of SIGTTIN at shell startup. | |
1008 | ||
1009 | aa. Fixed a bug with parsing here documents inside a command substitution when | |
1010 | looking for the closing delimiter. | |
1011 | ||
1012 | bb. Fixed a bug that caused printf to not quote all <blank> characters in the | |
1013 | current locale when using the `%q' format specifier. | |
1014 | ||
1015 | cc. Fixed a bug with bash's internal buffered I/O system that caused the input | |
1016 | pointer to not be reset when read(2) returned an EOF. | |
1017 | ||
1018 | dd. Bash now installs its SIGWINCH signal handler with SA_RESTART, so it will | |
1019 | not interrupt open/read/write system calls. | |
1020 | ||
1021 | ee. The ERR trap now reports line numbers more reliably. | |
1022 | ||
1023 | ff. The shell no longer tries to manipulate the terminal process group if a | |
1024 | command or process substitution is killed by SIGTERM when job control is | |
1025 | enabled. | |
1026 | ||
1027 | gg. Fixed a bug that caused extglob patterns to match filenames beginning with | |
1028 | a period. | |
1029 | ||
1030 | hh. File descriptors open for writing to here documents are no longer available | |
1031 | to subshells. | |
1032 | ||
1033 | ii. Make sure word completion doesn't perform command or process substitution. | |
1034 | ||
1035 | jj. Fixed a bug with parsing $$'...' inside a command substitution. | |
1036 | ||
1037 | kk. Fixed a bug that caused bash to remove backslash-newline pairs from the | |
1038 | body of a here-document with a quoted delimiter inside a command | |
1039 | substitution. | |
1040 | ||
1041 | ll. Fixed a bug that could cause the shell to hang when adding a pid to the | |
1042 | table of background process exit statuses. | |
1043 | ||
1044 | mm. Fixed a bug that could cause 0x01 characters to be doubled in the output | |
1045 | of process substitution. | |
1046 | ||
1047 | nn. Restricted shells now clear the hash table before making the PATH variable | |
1048 | read-only. | |
1049 | ||
1050 | oo. There are a number of changes to the expansion of $* and $@ in contexts | |
1051 | where word splitting does not occur (quoted and unquoted), with IFS set | |
1052 | to NULL or a non-standard value, mostly to deal with the consequences of | |
1053 | the behavior defined in Posix interpretation 888. | |
1054 | ||
1055 | pp. There are a number of changes to nameref variable handling to avoid | |
1056 | creating variables with invalid names. | |
1057 | ||
1058 | qq. A non-interactive posix mode shell no longer exits when an assignment | |
1059 | statement fails if the assignment is utimately being performed by the | |
1060 | `command' builtin. | |
1061 | ||
1062 | rr. When using character class names for globbing, don't allow case | |
1063 | insensitivity, even if nocaseglob is enabled. | |
1064 | ||
1065 | ss. Fixed a bug that allowed some redirections to stay in place if a later | |
1066 | redirection failed. | |
1067 | ||
1068 | tt. Fixed a bug in how command and process substitutions are recognized within | |
1069 | other parameter expansions. | |
1070 | ||
1071 | uu. Fixed a bug that caused bash to loop under certain circumstances when | |
1072 | performing arithmetic expansion on a variable whose value is an invalid | |
1073 | expression. | |
1074 | ||
1075 | vv. Fixed a bug that could cause bash to expand aliases inappropriately while | |
1076 | parsing compound commands like `case'. | |
1077 | ||
1078 | ww. Fixed a bug that could cause `read -N' to fail to read complete multibyte | |
1079 | characters, even when the sequences are incomplete or invalid, with or | |
1080 | without readline. | |
1081 | ||
1082 | xx. Fixed a bug that could cause `case' to fail to match patterns containing | |
1083 | 0x01 characters. | |
1084 | ||
1085 | yy. Fixed a bug that caused exported functions to contain stray 0x01 characters. | |
1086 | ||
1087 | zz. Fixed some inconsistencies with how the history number is handled in the | |
1088 | various prompt strings. | |
1089 | ||
1090 | aaa. Fixed a bug that could cause a core dump if READLINE_LINE was unset | |
1091 | inside a shell function bound to a key sequence with `bind -x'. | |
1092 | ||
1093 | bbb. Fixed a bug that could cause bash to not read a token terminator correctly | |
1094 | if a command substitution was used inside an arithmetic `for' command. | |
1095 | ||
1096 | ccc. Fixed problems that could occur with a fatal arithmetic expansion error | |
1097 | in a context (like prompt expansion) where you can't jump back to the | |
1098 | top level. | |
1099 | ||
1100 | ddd. Expression errors in arithmetic `for' commands are treated more like | |
1101 | shell syntax errors. | |
1102 | ||
1103 | eee. Fixed a parser synchronization error resulting from a syntax error | |
1104 | followed immediately by an EOF. | |
1105 | ||
1106 | fff. When executing a shell function, the first line in the function ($LINENO) | |
1107 | is line 1 instead of line 0, as Posix requires. | |
1108 | ||
1109 | ggg. In Posix mode, bash will canonicalize the value of PWD it inherits from | |
1110 | the environment and use that to set its idea of the current directory. | |
1111 | ||
1112 | hhh. If LINENO is exported, bash needs to regenerate its value each time it | |
1113 | constructs the environment. | |
1114 | ||
1115 | iii. Fixed a bug with restoring the SIGINT handler when using `wait -n'. | |
1116 | ||
1117 | jjj. Make sure the `coproc' command returns an appropriate status if the NAME | |
1118 | argument is invalid. | |
1119 | ||
1120 | kkk. Fixed a problem with arithmetic expressions containing array references | |
1121 | that contain arithmetic expressions with syntax errors. | |
1122 | ||
1123 | lll. The `select' command and help builtin will use $COLUMNS before the window | |
1124 | size returned from the kernel as the terminal width. | |
1125 | ||
1126 | mmm. `read -n 0' and `read -N 0' now try a zero-length read in an attempt to | |
1127 | detect file descriptor errors. | |
1128 | ||
1129 | nnn. The `read' builtin now does a better job of acting on signals that don't | |
1130 | interrupt read(2). | |
1131 | ||
1132 | ooo. Fixed some cases where `printf -v' did not return failure status on a | |
1133 | variable assignment error. | |
1134 | ||
1135 | ppp. Fixed temporary environment propagation back to the current environment | |
1136 | so that it doesn't happen for special builtins run by the `command' | |
1137 | builtin. | |
1138 | ||
1139 | qqq. Fixed a bug when searching for the end of a here-document delimiter in a | |
1140 | command substitution. | |
1141 | ||
1142 | rrr. Fixed a bug that could cause `cd ${DIRSTACK[0]}' to fail. | |
1143 | ||
1144 | sss. Fixed a bug that could cause reserved words to not be recognized in a | |
1145 | for statement without the `in' inside a command substitution. | |
1146 | ||
1147 | ttt. Fixed a bug that could cause a double-free in a timed command with an | |
1148 | expansion error. | |
1149 | ||
1150 | uuu. Fixed a bug that could cause a core dump if a script switches from a UTF-8 | |
1151 | locale to a different locale after displaying a lone surrogate character. | |
1152 | ||
1153 | vvv. Fixed cases where bash prematurely removed FIFOs attached to process | |
1154 | substitutions. | |
1155 | ||
1156 | www. Fixed a problem with calculating the size of the table that stores exit | |
1157 | statuses from background processes when the child process resource limit | |
1158 | is very large. | |
1159 | ||
1160 | xxx. Fixed a memory leak with functions using `return' when using FIFOs for | |
1161 | standard input. | |
1162 | ||
1163 | yyy. `wait' without arguments attempts to wait for all active process | |
1164 | substitution processes. | |
1165 | ||
1166 | zzz. Fixed a bug where an indirect parameter was subjected to word splitting | |
1167 | when trying to find the indirected variable name. | |
1168 | ||
1169 | aaaa. Fixed a bug that could allow restricted shell users to add commands to | |
1170 | the hash table. | |
1171 | ||
1172 | bbbb. When using the `!(patlist)' extended globbing operator, a filename | |
1173 | beginning with a `.' that doesn't match any of the patterns is not | |
1174 | returned as a match if leading dots must be matched explicitly. | |
1175 | ||
1176 | cccc. Fixed a bug that could cause line number and source file information for | |
1177 | a function definition to be incorrect if there are multiple definitions. | |
1178 | ||
1179 | dddd. Fixed a bug that could cause builtins like `readonly' to behave | |
1180 | differently when applied to arrays and scalar variables within functions. | |
1181 | ||
1182 | eeee. Fixed a bug that could cause alias expansion to add an extra space to | |
1183 | a quoted string that begins outside the alias expansion. | |
1184 | ||
1185 | ffff. Fixed a bug that could result in unwanted alias expansion after timing | |
1186 | the null command. | |
1187 | ||
1188 | gggg. Fixed a bug that could cause a core dump if a timestamp in a history | |
1189 | file overflowed a time_t. | |
1190 | ||
1191 | hhhh. Restricted shells can no longer redirect from /dev/tcp or /dev/udp, since | |
1192 | the kernel calls make those file descriptors read-write. | |
1193 | ||
1194 | iiii. Fixed a problem with splitting double-quoted words for programmable | |
1195 | completion when the double quote immediately follows another word | |
1196 | delimiter. | |
1197 | ||
1198 | jjjj. Fixed a bug resulting in a use-after-free if two file descriptors share | |
1199 | the same input buffer. | |
1200 | ||
1201 | kkkk. The error message resulting from ${x:?} and ${x?} now differs depending | |
1202 | on whether the variable is null or unset. | |
1203 | ||
1204 | llll. In Posix mode, the shell exits if a variable assignment fails and precedes | |
1205 | an empty simple command (after expansion). | |
1206 | ||
1207 | mmmm. Fixed a timing problem with SIGALRM that could cause the read builtin to | |
1208 | drop characters. | |
1209 | ||
1210 | nnnn. Added code to deal with kill(2) failing to send the shell a fatal signal | |
1211 | due to Linux pid namespace peculiarities. | |
1212 | ||
1213 | oooo. Fixed a bug that made \C-@ (NUL) unusable in key sequences used for | |
1214 | `bind -x' commands. | |
1215 | ||
1216 | pppp. Fixed a bug that could cause SIGINT recursion when running an external | |
1217 | command in a trap the shell takes after a command exits due to SIGINT. | |
1218 | ||
1219 | qqqq. Make sure the shell turns off job control before running the command- | |
1220 | not-found handle, so the command doesn't try to manipulate process | |
1221 | groups. | |
1222 | ||
1223 | rrrr. Fixed a problem with timing process substitutions that caused the shell | |
1224 | to print timing information for the calling command. | |
1225 | ||
1226 | ssss. Fixed a bug that caused backquotes in a here-document delimiter to mark | |
1227 | the delimiter as quoted (inhibiting expansion of the here-document | |
1228 | contents). | |
1229 | ||
1230 | tttt. Fixed several problems with 0x01 and 0x177 in case pattern lists and | |
1231 | conditional command pattern matches. | |
1232 | ||
1233 | uuuu. Fixed a bug that could cause the pattern matching engine to not recognize | |
1234 | locale-specific character classes. | |
1235 | ||
1236 | vvvv. The auto-configuration now tests for /dev/stdin and /dev/fd independently. | |
1237 | ||
1238 | wwww. The `globstar' code now skips over symbolic links to directories, | |
1239 | preventing them from being scanned twice. | |
1240 | ||
1241 | xxxx. When running `bind -x' commands, bash now sets READLINE_POINT based on | |
1242 | the number of characters in the readline line buffer, not the number of | |
1243 | bytes. | |
1244 | ||
1245 | yyyy. Fixed a problem that could cause recursive trap evaluation of the RETURN | |
1246 | trap when using `eval return'. | |
1247 | ||
1248 | zzzz. Fixed a bug with expanding 0x01 in an unquoted here-document. | |
1249 | ||
1250 | aaaaa. The process substitution code now closes and unlinks FIFOs when the | |
1251 | process on the other side exits, in order to prevent SIGPIPE or | |
1252 | waiting until a FIFO opened for read has a writer. | |
1253 | ||
1254 | bbbbb. Fixed a bug with recursive calls to the parser overwriting the token in | |
1255 | an {id}>foo construct. | |
1256 | ||
1257 | ccccc. After a Posix discussion, the pattern matching engine just skips over | |
1258 | invalid character classes in bracket expressions, instead of matching | |
1259 | them like individual characters in the expression. | |
1260 | ||
1261 | ddddd. Fixed a posix-mode problem with variable scoping when creating variables | |
1262 | from assignment statements preceding special builtins. | |
1263 | ||
1264 | eeeee. Fixed a bug that could cause patterns containing backslashes to not be | |
1265 | run through the pattern matching engine. | |
1266 | ||
1267 | fffff. Fixed a bug that could cause redirections to compound commands to not | |
1268 | be `undone' if the file descriptor in the redirection was closed when | |
1269 | the redirection was initially processed. | |
1270 | ||
1271 | ggggg. Fixed a bug that could cause buffer corruption when using `bind -x' in | |
1272 | a command execute as a result of a key binding installed by `bind -x'. | |
1273 | ||
1274 | 2. Changes to Readline | |
1275 | ||
1276 | a. Added a guard to prevent nested macros from causing an infinite expansion | |
1277 | loop. | |
1278 | ||
1279 | b. Instead of allocating enough history list entries to hold the maximum list | |
1280 | size, cap the number allocated initially. | |
1281 | ||
1282 | c. Added a strategy to avoid allocating huge amounts of memory if a block of | |
1283 | history entries without timestamps occurs after a block with timestamps. | |
1284 | ||
1285 | d. Added support for keyboard timeouts when an ESC character is the last | |
1286 | character in a macro. | |
1287 | ||
1288 | e. There are several performance improvements when in a UTF-8 locale. | |
1289 | ||
1290 | f. Readline does a better job of preserving the original set of blocked | |
1291 | signals when using pselect() to wait for input. | |
1292 | ||
1293 | g. Fixed a bug that caused multibyte characters in macros to be mishandled. | |
1294 | ||
1295 | h. Fixed several bugs in the code that calculates line breaks when expanding | |
1296 | prompts that span several lines, contain multibyte characters, and contain | |
1297 | invisible character seqeuences. | |
1298 | ||
1299 | i. Fixed several bugs in cursor positioning when displaying lines with prompts | |
1300 | containing invisible characters and multibyte characters. | |
1301 | ||
1302 | j. When performing case-insensitive completion, Readline no longer sorts the | |
1303 | list of matches unless directed to do so. | |
1304 | ||
1305 | k. Fixed a problem with key sequences ending with a backslash. | |
1306 | ||
1307 | l. Fixed out-of-bounds and free memory read errors found via fuzzing. | |
1308 | ||
1309 | m. Fixed several cases where the mark was set to an invalid value. | |
1310 | ||
1311 | n. Fixed a problem with the case-changing operators in the case where the | |
1312 | lower and upper case versions of a character do not have the same number | |
1313 | of bytes. | |
1314 | ||
1315 | o. Handle incremental and non-incremental search character reads returning EOF. | |
1316 | ||
1317 | p. Handle the case where a failing readline command at the end of a multi-key | |
1318 | sequence could be misinterpreted. | |
1319 | ||
1320 | q. The history library now prints a meaningful error message if the history | |
1321 | file isn't a regular file. | |
1322 | ||
1323 | r. Fixed a problem with vi-mode redo (`.') on a command when trying to replace | |
1324 | a multibyte character. | |
1325 | ||
1326 | s. The key binding code now attempts to remove a keymap if a key unbinding | |
1327 | leaves it empty. | |
1328 | ||
1329 | t. Fixed a line-wrapping issue that caused problems for some terminal | |
1330 | emulators. | |
1331 | ||
1332 | u. If there is a key bound to the tty's VDISCARD special character, readline | |
1333 | disables VDISCARD while it is active. | |
1334 | ||
1335 | v. Fixed a problem with exiting bracketed paste mode on terminals that assume | |
1336 | the bracketed paste mode character sequence contains visible characters. | |
1337 | ||
1338 | w. Fixed a bug that could cause a key binding command to refer to an | |
1339 | uninitialized variable. | |
1340 | ||
1341 | 3. New Features in Bash | |
1342 | ||
1343 | a. The `wait' builtin can now wait for the last process substitution created. | |
1344 | ||
1345 | b. There is an EPOCHSECONDS variable, which expands to the time in seconds | |
1346 | since the Unix epoch. | |
1347 | ||
1348 | c. There is an EPOCHREALTIME variable, which expands to the time in seconds | |
1349 | since the Unix epoch with microsecond granularity. | |
1350 | ||
1351 | d. New loadable builtins: rm, stat, fdflags. | |
1352 | ||
1353 | e. BASH_ARGV0: a new variable that expands to $0 and sets $0 on assignment. | |
1354 | ||
1355 | f. When supplied a numeric argument, the shell-expand-line bindable readline | |
1356 | command does not perform quote removal and suppresses command and process | |
1357 | substitution. | |
1358 | ||
1359 | g. `history -d' understands negative arguments: negative arguments offset from | |
1360 | the end of the history list. | |
1361 | ||
1362 | h. The `name' argument to the `coproc' reserved word now undergoes word | |
1363 | expansion, so unique coprocs can be created in loops. | |
1364 | ||
1365 | i. A nameref name resolution loop in a function now resolves to a variable by | |
1366 | that name in the global scope. | |
1367 | ||
8868edaf | 1368 | j. The `wait' builtin now has a `-f' option, which signifies to wait until the |
d233b485 CR |
1369 | specified job or process terminates, instead of waiting until it changes |
1370 | state. | |
1371 | ||
1372 | k. There is a define in config-top.h that allows the shell to use a static | |
1373 | value for $PATH, overriding whatever is in the environment at startup, for | |
1374 | use by the restricted shell. | |
1375 | ||
1376 | l. Process substitution does not inherit the `v' option, like command | |
1377 | substitution. | |
1378 | ||
1379 | m. If a non-interactive shell with job control enabled detects that a foreground | |
1380 | job died due to SIGINT, it acts as if it received the SIGINT. | |
1381 | ||
1382 | n. The SIGCHLD trap is run once for each exiting child process even if job | |
1383 | control is not enabled when the shell is in Posix mode. | |
1384 | ||
1385 | o. A new shopt option: localvar_inherit; if set, a local variable inherits the | |
1386 | value of a variable with the same name at the nearest preceding scope. | |
1387 | ||
1388 | p. `bind -r' now checks whether a key sequence is bound before binding it to | |
1389 | NULL, to avoid creating keymaps for a multi-key sequence. | |
1390 | ||
1391 | q. A numeric argument to the line editing `operate-and-get-next' command | |
1392 | specifies which history entry to use. | |
1393 | ||
1394 | r. The positional parameters are now assigned before running the shell startup | |
1395 | files, so startup files can use $@. | |
1396 | ||
1397 | s. There is a compile-time option that forces the shell to disable the check | |
1398 | for an inherited OLDPWD being a directory. | |
1399 | ||
1400 | t. The `history' builtin can now delete ranges of history entries using | |
1401 | `-d start-end'. | |
1402 | ||
1403 | u. The `vi-edit-and-execute-command' bindable readline command now puts readline | |
1404 | back in vi insertion mode after executing commands from the edited file. | |
1405 | ||
1406 | v. The command completion code now matches aliases and shell function names | |
1407 | case-insensitively if the readline completion-ignore-case variable is set. | |
1408 | ||
1409 | w. There is a new `assoc_expand_once' shell option that attempts to expand | |
1410 | associative array subscripts only once. | |
1411 | ||
1412 | x. The shell only sets up BASH_ARGV and BASH_ARGC at startup if extended | |
1413 | debugging mode is active. The old behavior of unconditionally setting them | |
1414 | is available as part of the shell compatibility options. | |
1415 | ||
1416 | y. The `umask' builtin now allows modes and masks greater than octal 777. | |
1417 | ||
1418 | z. The `times' builtin now honors the current locale when printing a decimal | |
1419 | point. | |
1420 | ||
1421 | aa. There is a new (disabled by default, undocumented) shell option to enable | |
1422 | and disable sending history to syslog at runtime. | |
1423 | ||
1424 | 4. New Features in Readline | |
1425 | ||
1426 | a. Non-incremental vi-mode search (`N', `n') can search for a shell pattern, as | |
1427 | Posix specifies (uses fnmatch(3) if available). | |
1428 | ||
1429 | b. There are new `next-screen-line' and `previous-screen-line' bindable | |
1430 | commands, which move the cursor to the same column in the next, or previous, | |
1431 | physical line, respectively. | |
1432 | ||
1433 | c. There are default key bindings for control-arrow-key key combinations. | |
1434 | ||
1435 | d. A negative argument (-N) to `quoted-insert' means to insert the next N | |
1436 | characters using quoted-insert. | |
1437 | ||
1438 | e. New public function: rl_check_signals(), which allows applications to | |
1439 | respond to signals that readline catches while waiting for input using | |
1440 | a custom read function. | |
1441 | ||
1442 | f. There is new support for conditionally testing the readline version in an | |
1443 | inputrc file, with a full set of arithmetic comparison operators available. | |
1444 | ||
1445 | g. There is a simple variable comparison facility available for use within an | |
1446 | inputrc file. Allowable operators are equality and inequality; string | |
1447 | variables may be compared to a value; boolean variables must be compared to | |
1448 | either `on' or `off'; variable names are separated from the operator by | |
1449 | whitespace. | |
1450 | ||
1451 | ------------------------------------------------------------------------------ | |
a0c0a00f CR |
1452 | This document details the changes between this version, bash-4.4-release, and |
1453 | the previous version, bash-4.4-rc2. | |
1454 | ||
1455 | 1. Changes to Bash | |
1456 | ||
1457 | a. Fixed a bug that could potentially result in a crash due to an integer | |
1458 | overflow. | |
1459 | ||
1460 | b. Fixed a bug in where commands printed due to `set -x' could be incorrectly | |
1461 | quoted if being printed in contexts where they haven't yet been expanded. | |
1462 | ||
1463 | c. Fixed several memory leaks. | |
1464 | ||
1465 | d. Fixed a bug that could potentially cause the terminal attributes to be | |
1466 | set incorrectly by a command run from a programmable completion. | |
1467 | ||
1468 | e. Fixed several potential buffer overflow issues in the word expansion code. | |
1469 | ||
1470 | 2. Changes to Readline | |
1471 | ||
1472 | 3. New Features in Bash | |
1473 | ||
1474 | 4. New Features in Readline | |
a0c0a00f CR |
1475 | ------------------------------------------------------------------------------ |
1476 | This document details the changes between this version, bash-4.4-rc2, and | |
1477 | the previous version, bash-4.4-beta2. | |
1478 | ||
1479 | 1. Changes to Bash | |
1480 | ||
1481 | a. Fixed an out-of-bounds read in the redirection operator completion code. | |
1482 | ||
1483 | b. Fixed execution context so `until continue' doesn't disable execution for | |
1484 | subsequent commands. | |
1485 | ||
1486 | c. Fixed trap handling code so traps don't inherit a command's temporary | |
1487 | environment. | |
1488 | ||
1489 | d. Fixed a bug that resulted in incorrect line numbers when a function is | |
1490 | defined as part of another function's execution. | |
1491 | ||
1492 | e. Fixed a bug in the expansion of ${a[@]} in contexts where word splitting | |
1493 | is not performed and $IFS is not the default. | |
1494 | ||
1495 | f. Fixed a bug that caused ''"$@" to not expand to an empty argument when | |
1496 | there are no positional parameters. | |
1497 | ||
1498 | g. Fixed a bug that caused a shell compiled without job control to use the | |
1499 | incorrect exit status for builtin commands preceded by a command executed | |
1500 | from the file system that causes the shell to call waitpid(). | |
1501 | ||
1502 | h. Improved word completion for quoted strings containing unterminated command | |
1503 | substitutions with embedded double quotes. | |
1504 | ||
1505 | 2. Changes to Readline | |
1506 | ||
1507 | a. Fixed a bug that caused mode strings to be displayed incorrectly if the | |
1508 | prompt was shorter than the mode string. | |
1509 | ||
1510 | 3. New Features in Bash | |
1511 | ||
1512 | a. Using ${a[@]} or ${a[*]} with an array without any assigned elements when | |
1513 | the nounset option is enabled no longer throws an unbound variable error. | |
1514 | ||
1515 | 4. New Features in Readline | |
1516 | ||
1517 | a. New application-callable function: rl_pending_signal(): returns the signal | |
1518 | number of any signal readline has caught but not yet handled. | |
1519 | ||
1520 | b. New application-settable variable: rl_persistent_signal_handlers: if set | |
1521 | to a non-zero value, readline will enable the readline-6.2 signal handler | |
1522 | behavior in callback mode: handlers are installed when | |
1523 | rl_callback_handler_install is called and removed removed when a complete | |
1524 | line has been read. | |
1525 | ||
1526 | ------------------------------------------------------------------------------ | |
1527 | This document details the changes between this version, bash-4.4-beta2, and | |
1528 | the previous version, bash-4.4-rc1. | |
1529 | ||
1530 | 1. Changes to Bash | |
1531 | ||
1532 | a. Fixed a memory leak when processing ${!var[@]}. | |
1533 | ||
1534 | b. Fixed a bug that caused subshells to free trap strings associated with | |
1535 | inherited signals. | |
1536 | ||
1537 | c. Inheriting BASHOPTS from the environment now works to force actions | |
1538 | associated with enabling an option, instead of just marking the option | |
1539 | as enabled. | |
1540 | ||
1541 | d. Fixed a bug that allowed assignments to BASH_CMDS when the shell was in | |
1542 | restricted mode. | |
1543 | ||
1544 | e. Fixed a bug caused by an accidental omission of part of the original patch | |
1545 | for EXECIGNORE. | |
1546 | ||
1547 | e. Prompt expansion now quotes the results of the \s, \h, and \H expansions. | |
1548 | ||
1549 | f. Fixed a bug that caused parsing errors in command substitutions with | |
1550 | consecutive case statements separated by newlines. | |
1551 | ||
1552 | g. Updated logic used to decide whether bash is running inside an emacs | |
1553 | terminal emulator to work with future emacs versions. | |
1554 | ||
1555 | h. Fixed two extended pattern matching bugs caused by premature short- | |
1556 | circuiting. | |
1557 | ||
1558 | i. Fixed a memory leak in the code that removes duplicate history entries. | |
1559 | ||
1560 | j. There are a number of bug fixes to coproc, mapfile, declare, unset, | |
1561 | and assignment statements that prevent nameref variables from creating | |
1562 | and unsetting variables with invalid names. | |
1563 | ||
1564 | k. Fixed a bug that caused variables to be inadvertently marked as both an | |
1565 | associative and an indexed array. | |
1566 | ||
1567 | l. Fixed a bug that caused `bash -c' to not run a trap specified in the | |
1568 | command string. | |
1569 | ||
1570 | j. There are a number of bug fixes to coproc, mapfile, declare, and assignment | |
1571 | statements that prevent nameref variables from overwriting or modifying | |
1572 | attributes of readonly variables. | |
1573 | ||
1574 | k. Fixed a bug that caused command substitution to attempt to set the | |
1575 | terminal's process group incorrectly. | |
1576 | ||
1577 | l. Fixed a bug that could cause prompt string expansion to display error | |
1578 | messages when the `nounset' shell option is set. | |
1579 | ||
1580 | m. Fixed a bug that caused "$@" to not expand to an empty string under the | |
1581 | circumstances when Posix says it should ("${@-${@-$@}}"). | |
1582 | ||
1583 | n. Fixed several bugs caused by referencing nameref variables whose values | |
1584 | are names of unset variables (or names that are valid for referencing | |
1585 | but not assignment), including creating variables in the temporary | |
1586 | environment. | |
1587 | ||
1588 | o. Function tracing and error tracing are disabled if --debugger is supplied | |
1589 | at startup but the shell can't find the debugger start file. | |
1590 | ||
1591 | p. Fixed a bug when IFS is used as the control variable in a for statement. | |
1592 | ||
1593 | q. Fixed a bug with SIGINT received by a command substitution in an interactive | |
1594 | shell. | |
1595 | ||
1596 | r. The checks for nameref variable self-references are more thorough. | |
1597 | ||
1598 | s. Fixed several bugs with multi-line aliases. | |
1599 | ||
1600 | t. Fixed `test' to handle the four-argument case where $1 == '(' and | |
1601 | $4 == ')'. | |
1602 | ||
1603 | u. Fixed a bug in the expansion of $* in the cases where word splitting is | |
1604 | not performed. | |
1605 | ||
1606 | v. Fixed a bug in execution of case statements where IFS includes the | |
1607 | pattern matching characters. | |
1608 | ||
1609 | 2. Changes to Readline | |
1610 | ||
1611 | a. When refreshing the line as the result of a key sequence, Readline attempts | |
1612 | to redraw only the last line of a multiline prompt. | |
1613 | ||
1614 | b. Fixed an issue that caused completion of git commands to display | |
1615 | incorrectly when using colored-completion-prefix. | |
1616 | ||
1617 | c. Fixed several redisplay bugs having to do with multibyte characters and | |
1618 | invisible characters in prompt strings. | |
1619 | ||
1620 | 3. New Features in Bash | |
1621 | ||
1622 | a. Value conversions (arithmetic expansions, case modification, etc.) now | |
1623 | happen when assigning elements of an array using compound assignment. | |
1624 | ||
1625 | b. There is a new option settable in config-top.h that makes multiple | |
1626 | directory arguments to `cd' a fatal error. | |
1627 | ||
1628 | c. Bash now uses mktemp() when creating internal temporary files; it produces | |
1629 | a warning at build time on many Linux systems. | |
1630 | ||
1631 | 4. New Features in Readline | |
1632 | ||
1633 | a. The default binding for ^W in vi mode now uses word boundaries specified | |
1634 | by Posix (vi-unix-word-rubout is bindable command name). | |
1635 | ||
1636 | b. rl_clear_visible_line: new application-callable function; clears all | |
1637 | screen lines occupied by the current visible readline line. | |
1638 | ||
1639 | c. rl_tty_set_echoing: application-callable function that controls whether | |
1640 | or not readline thinks it is echoing terminal output. | |
1641 | ||
1642 | d. Handle >| and strings of digits preceding and following redirection | |
1643 | specifications as single tokens when tokenizing the line for history | |
1644 | expansion. | |
1645 | ||
1646 | e. Fixed a bug with displaying completions when the prefix display length | |
1647 | is greater than the length of the completions to be displayed. | |
1648 | ||
1649 | f. The :p history modifier now applies to the entire line, so any expansion | |
1650 | specifying :p causes the line to be printed instead of expanded. | |
1651 | ||
1652 | ------------------------------------------------------------------------------ | |
1653 | This document details the changes between this version, bash-4.4-rc1, and | |
1654 | the previous version, bash-4.4-beta. | |
1655 | ||
1656 | 1. Changes to Bash | |
1657 | ||
1658 | a. Fixed several problems with bash completion not special-casing bash syntax | |
1659 | constructs. | |
1660 | ||
1661 | b. Fixed a bug that caused the mapfile builtin to not create array variables | |
1662 | when a variable of the same name appears in the temporary environment. | |
1663 | ||
1664 | c. Fixed a bug that caused prompt expansion to loop when PS1 contained a | |
1665 | syntax error. | |
1666 | ||
1667 | d. Fixed a bug that caused the ${array[@]@A} expansion to split the results | |
1668 | even when double-quoted. | |
1669 | ||
1670 | e. There is a new implementation of the code that saves the last CHILD_MAX | |
1671 | exited background pids so their status can be queried later. | |
1672 | ||
1673 | f. Bash-4.4 can now be configured and built on very old versions of Solaris 2. | |
1674 | ||
1675 | g. Fixed problems with --help support for several builtins. | |
1676 | ||
1677 | h. Fixed values added to BASH_SOURCE and BASH_LINENO for functions inherited | |
1678 | from the environment. | |
1679 | ||
1680 | i. Fixed a bug that caused background processes run from non-interactive shells | |
1681 | with job control enabled to place the terminal in the wrong process group | |
1682 | under certain circumstances. | |
1683 | ||
1684 | j. Fixed a bug that caused `fc' to return an incorrect exit status when | |
1685 | executing commands from the history list. | |
1686 | ||
1687 | k. Fixed a bug that caused the shell to exit when a process substitution | |
1688 | received a SIGINT when run in certain terminal emulators. | |
1689 | ||
1690 | l. EXECIGNORE now honors the setting of `extglob' when attempting to match | |
1691 | executable names. | |
1692 | ||
1693 | m. Fixed a bug where `return' used the wrong exit status when executed in a | |
1694 | DEBUG trap. | |
1695 | ||
1696 | n. Fixed a bug that caused a command containing a here-document and an escaped | |
1697 | newline to be stored in the history list incorrectly. | |
1698 | ||
1699 | o. Fixed a bug that caused set -e to be honored in cases of builtins invoking | |
1700 | other builtins when it should be ignored. | |
1701 | ||
1702 | p. Fixed a bug that caused `readonly' and `export' to create local array | |
1703 | variables when used within shell functions. | |
1704 | ||
1705 | q. Fixed a bug that allowed subshells begun to execute process substitutions | |
1706 | to have access to the command's temporary environment. | |
1707 | ||
1708 | r. Fixed a bug that could cause the shell to dump core when receiving a | |
1709 | SIGCHLD for which a trap has been set while running in posix mode. | |
1710 | ||
1711 | s. Fixed a bug that caused bash to not restore BASH_ARGC, BASH_ARGV, | |
1712 | BASH_SOURCE, BASH_LINENO, and FUNCNAME if the shell received a SIGINT | |
1713 | while reading commands from a file while executing `.'. | |
1714 | ||
1715 | t. Fixed a bug that caused the `-o history' option to have no effect when | |
1716 | supplied on the command line when starting a new shell. | |
1717 | ||
1718 | u. Fixed a bug that caused history expansions occurring in command | |
1719 | substitutions to not be performed. | |
1720 | ||
1721 | v. Fixed a bug that caused `eval' run in a non-interactive shell to disable | |
1722 | history expansion for the remainder of the shell script, even if the script | |
1723 | had previously enabled it. | |
1724 | ||
1725 | w. Fixed a bug that caused "$@" to not expand to multiple words when IFS is set | |
1726 | to the empty string. | |
1727 | ||
1728 | x. Fixed a bug that caused process and command substitution to inherit output | |
1729 | buffered in the stdio library but not written. | |
1730 | ||
1731 | y. Fixed a bug that caused a terminating signal received during `echo' to run | |
1732 | an exit trap in a signal handler context. | |
1733 | ||
1734 | z. Fixed a bug that caused a builtin command containing a process substitution | |
1735 | to return the wrong exit status. | |
1736 | ||
1737 | aa. Fixed a bug that caused `()' subshells with piped input to incorrectly | |
1738 | redirect the standard input of some of the commands in the subshell from | |
1739 | /dev/null. | |
1740 | ||
1741 | bb. The history builtin now uses more descriptive error messages for missing or | |
1742 | invalid timestamps. | |
1743 | ||
1744 | 2. Changes to Readline | |
1745 | ||
1746 | a. The history file writing functions only attempt to create and use a backup | |
1747 | history file if the history file exists and is a regular file. | |
1748 | ||
1749 | b. Fixed an out-of-bounds read in readline's internal tilde expansion | |
1750 | interface. | |
1751 | ||
1752 | c. Fixed several redisplay bugs with prompt strings containing multibyte | |
1753 | and non-visible characters whose physical length is longer than the screen | |
1754 | width. | |
1755 | ||
1756 | d. Fixed a redisplay bug with prompt strings containing invisible characters | |
1757 | whose physical length exceeds the screen width and using incremental search. | |
1758 | ||
1759 | e. Readline prints more descriptive error messages when it encounters errors | |
1760 | while reading an inputrc file. | |
1761 | ||
1762 | f. Fixed a bug in the character insertion code that attempts to optimize | |
1763 | typeahead when it reads a character that is not bound to self-insert and | |
1764 | resets the key sequence state. | |
1765 | ||
1766 | 3. New Features in Bash | |
1767 | ||
1768 | a. BASH_COMPAT and FUNCNEST can be inherited and set from the shell's initial | |
1769 | environment. | |
1770 | ||
1771 | b. inherit_errexit: a new `shopt' option that, when set, causes command | |
1772 | substitutions to inherit the -e option. By default, those subshells disable | |
1773 | -e. It's enabled as part of turning on posix mode. | |
1774 | ||
1775 | c. New prompt string: PS0. Expanded and displayed by interactive shells after | |
1776 | reading a complete command but before executing it. | |
1777 | ||
1778 | d. Interactive shells now behave as if SIGTSTP/SIGTTIN/SIGTTOU are set to | |
1779 | SIG_DFL when the shell is started, so they are set to SIG_DFL in child | |
1780 | processes. | |
1781 | ||
1782 | e. Posix-mode shells now allow double quotes to quote the history expansion | |
1783 | character. | |
1784 | ||
1785 | f. OLDPWD can be inherited from the environment if it names a directory. | |
1786 | ||
1787 | g. Shells running as root no longer inherit PS4 from the environment, closing | |
1788 | a security hole involving PS4 expansion performing command substitution. | |
1789 | ||
1790 | h. If executing an implicit `cd' when the `autocd' option is set, bash will | |
1791 | now invoke a function named `cd' if one exists before executing the `cd' | |
1792 | builtin. | |
1793 | ||
1794 | 4. New Features in Readline | |
1795 | ||
1796 | a. If an incremental search string has its last character removed with DEL, | |
1797 | the resulting empty search string no longer matches the previous line. | |
1798 | ||
1799 | b. If readline reads a history file that begins with `#' (or the value of | |
1800 | the history comment character) and has enabled history timestamps, the | |
1801 | history entries are assumed to be delimited by timestamps. This allows | |
1802 | multi-line history entries. | |
1803 | ||
1804 | c. Readline now throws an error if it parses a key binding without a | |
1805 | terminating `:' or whitespace. | |
1806 | ||
1807 | ------------------------------------------------------------------------------ | |
1808 | This document details the changes between this version, bash-4.4-beta, and | |
1809 | the previous version, bash-4.4-alpha. | |
1810 | ||
1811 | 1. Changes to Bash | |
1812 | ||
1813 | a. Fixed two bugs that caused out-of-bounds reads when skipping over assignment | |
1814 | statements while finding the word on which to perform programmable | |
1815 | completion. | |
1816 | ||
1817 | b. Fixed a memory leak in programmable completion. | |
1818 | ||
1819 | c. Fixed a bug that could cause the shell to crash when interrupting the | |
1820 | wait builtin. | |
1821 | ||
1822 | d. Fixed a bug that caused ${!vvv@} to be interpreted as introducing the new | |
1823 | `@' operator. | |
1824 | ||
1825 | e. Fixed a bug that caused the && and || operators to be incorrectly optimized. | |
1826 | ||
1827 | f. The shell now undoes redirections before exiting the shell when the `-e' | |
1828 | option is enabled, and a shell function fails. | |
1829 | ||
1830 | g. History expansion now skips over the history expansion character in command | |
1831 | and process substitution. | |
1832 | ||
1833 | h. Fixed a bug that caused stray '\001' characters to be added to the output | |
1834 | of `declare -p'. | |
1835 | ||
1836 | i. Fixed a memory leak when processing declare commands that perform compound | |
1837 | array assignments. | |
1838 | ||
1839 | j. Fixed a bug that could cause the shell to crash when reading input from a | |
1840 | file and the limit on open file descriptors is high. | |
1841 | ||
1842 | k. Fixed a bug that caused the ERR and RETURN traps to be unset if they were | |
1843 | set in a shell function but unset previously. | |
1844 | ||
1845 | l. Fixed a bug that caused several signals to be ignored if `exec' failed in | |
1846 | an interactive shell. | |
1847 | ||
1848 | m. A posix-mode non-interactive shell now considers a parameter expansion error | |
1849 | to be a fatal error. | |
1850 | ||
1851 | n. The `time' command now prints timing statistics for failed commands when | |
1852 | the -e option is enabled. | |
1853 | ||
1854 | o. Fixed a bug that caused the shell to crash when attempting to indirectly | |
1855 | expand a shell variable with an invalid name. | |
1856 | ||
1857 | p. Fixed a bug that caused the shell to crash when running a trap containing | |
1858 | a process substitution. | |
1859 | ||
1860 | q. Bash now prints the keyword `function' before a function with the same name | |
1861 | as a reserved word when using `declare -f' to avoid parse errors when | |
1862 | reusing the output as input. | |
1863 | ||
1864 | r. Fixed a bug that caused the shell to crash when using declare -g to attempt | |
1865 | to redefine an existing global indexed array variable as an associative | |
1866 | array. | |
1867 | ||
1868 | s. Fixed a memory leak that occurred when interrupting brace expansions | |
1869 | generating a sequence. | |
1870 | ||
1871 | t. Fixed a bug that resulted in alias expansion in redirections. | |
1872 | ||
1873 | u. The `declare -a' and `declare -A' commands now print fewer warnings when | |
1874 | attempting to create and initialize an array at the same time, but | |
1875 | relying on word expansions to construct the compound assignment. | |
1876 | ||
1877 | v. The `help' builtin now behaves better in locales where each wide | |
1878 | character occupies more than one display column. | |
1879 | ||
1880 | w. The `read' builtin no longer has a possible race condition when a timeout | |
1881 | occurs. | |
1882 | ||
1883 | x. Fixed several expansion problems encountered when IFS="'". | |
1884 | ||
1885 | y. Fixed a problem with the expansion of $'\c?'. | |
1886 | ||
1887 | z. Bash no longer splits the expansion of here-strings, as the documentation | |
1888 | has always said. | |
1889 | ||
1890 | aa. Bash now puts `s' in the value of $- if the shell is reading from standard | |
1891 | input, as Posix requires. | |
1892 | ||
1893 | bb. Fixed a bug that caused the shell to crash if invoked with a NULL | |
1894 | environment. | |
1895 | ||
1896 | cc. The shell now only trusts an inherited value for $PWD if it begins with a | |
1897 | `/'. | |
1898 | ||
1899 | dd. Fixed a memory leak when creating local array variables and assigning to | |
1900 | them using compound assignment with the `declare' builtin. | |
1901 | ||
1902 | ee. Fixed a bug that could cause the shell to crash when processing nested here | |
1903 | documents inside a command substitution. | |
1904 | ||
1905 | ff. Array keys and values are now displayed using $'...' quoting where | |
1906 | appropriate. | |
1907 | ||
1908 | gg. Fixed a bug that could cause the shell to crash if the replacement string | |
1909 | in pattern substitution was NULL. | |
1910 | ||
1911 | hh. Fixed a bug that could cause the shell to crash if a command substitution | |
1912 | contained a non-fatal syntax error. | |
1913 | ||
1914 | ii. Fixed a bug that could cause the shell to crash if variable indirection | |
1915 | resulted in a NULL variable. | |
1916 | ||
1917 | jj. Fixed a bug that could cause the shell to crash if a long string contained | |
1918 | multiple unterminated parameter expansion constructs. | |
1919 | ||
1920 | kk. Improved the code that acts on SIGINT received while waiting for a child | |
1921 | process only if the child exits due to SIGINT. | |
1922 | ||
1923 | ll. $BASH_SUBSHELL now has more consistent values in asynchronous simple | |
1924 | commands. | |
1925 | ||
1926 | 2. Changes to Readline | |
1927 | ||
1928 | a. Colored completion prefixes are now displayed using a different color, less | |
1929 | likely to collide with files. | |
1930 | ||
1931 | b. Fixed a bug that caused vi-mode character search to misbehave when | |
1932 | running in callback mode. | |
1933 | ||
1934 | c. Fixed a bug that caused output to be delayed when input is coming from a | |
1935 | macro in vi-mode. | |
1936 | ||
1937 | d. Fixed a bug that caused the vi-mode `.' command to misbehave when redoing | |
1938 | a multi-key key sequence via a macro. | |
1939 | ||
1940 | e. Fixed a bug that caused problems with applications that supply their own | |
1941 | input function when performing completion. | |
1942 | ||
1943 | f. When read returns -1/EIO when attempting to read a key, return an error | |
1944 | instead of line termination back to the caller. | |
1945 | ||
1946 | g. Updated tty auditing feature based on patch from Red Hat. | |
1947 | ||
1948 | h. Fixed a bug that could cause the history library to crash on overflows | |
1949 | introduced by malicious editing of timestamps in the history file. | |
1950 | ||
1951 | 3. New Features in Bash | |
1952 | ||
1953 | a. `make install' now installs the example loadable builtins and a set of | |
1954 | bash headers to use when developing new loadable builtins. | |
1955 | ||
1956 | b. `enable -f' now attempts to call functions named BUILTIN_builtin_load when | |
1957 | loading BUILTIN, and BUILTIN_builtin_unload when deleting it. This allows | |
1958 | loadable builtins to run initialization and cleanup code. | |
1959 | ||
1960 | c. There is a new BASH_LOADABLES_PATH variable containing a list of directories | |
1961 | where the `enable -f' command looks for shared objects containing loadable | |
1962 | builtins. | |
1963 | ||
1964 | d. The `complete_fullquote' option to `shopt' changes filename completion to | |
1965 | quote all shell metacharacters in filenames and directory names. | |
1966 | ||
1967 | e. The `kill' builtin now has a `-L' option, equivalent to `-l', for | |
1968 | compatibility with Linux standalone versions of kill. | |
1969 | ||
1970 | 4. New Features in Readline | |
1971 | ------------------------------------------------------------------------------ | |
1972 | This document details the changes between this version, bash-4.4-alpha, and | |
1973 | the previous version, bash-4.3-release. | |
1974 | ||
1975 | 1. Changes to Bash | |
1976 | ||
1977 | a. A bug that caused pipelines to be corrupted while running the DEBUG trap | |
1978 | was fixed. | |
1979 | ||
1980 | b. A bug that accidentally omitted the `-R' unary operator from `test' was | |
1981 | fixed. | |
1982 | ||
1983 | c. A bug that could cause the shell to not restore the terminal's process | |
1984 | group on shell exit was fixed. | |
1985 | ||
1986 | d. Several changes were made to programmable completion to accommodate | |
1987 | assumptions made by the bash-completion package. | |
1988 | ||
1989 | e. Bash no longer inhibits C-style escape processing ($'...') while performing | |
1990 | pattern substitution word expansions. | |
1991 | ||
1992 | f. Fixed a bug that caused `return' executed from a trap handler to use the | |
1993 | wrong return status when one was not supplied as an argument. | |
1994 | ||
1995 | g. In Posix mode, defining a function with the same name as a special | |
1996 | builtin is now an error, fatal only when the shell is not interactive. | |
1997 | ||
1998 | h. Fixed a bug that caused compound array assignments to discard unset or null | |
1999 | variables used as subscripts, thereby making it appear as if the index was | |
2000 | not present. | |
2001 | ||
2002 | i. Fixed a bug that caused extended glob patterns to incorrectly match | |
2003 | filenames with a leading `.'. | |
2004 | ||
2005 | j. Fixed a bug involving sign extension when reallocating the input line | |
2006 | after a history expansion, causing segmentation faults. | |
2007 | ||
2008 | k. Bash now does a better job at identifying syntax errors during word | |
2009 | completion and tailoring completion appropriately. | |
2010 | ||
8868edaf | 2011 | l. Bash now uses the current locale's decimal point in command timing output. |
a0c0a00f CR |
2012 | |
2013 | m. Fixed a bug that caused segmentation faults while reading here documents if | |
2014 | PS2 contains a command substitution. | |
2015 | ||
2016 | n. There are several changes to how $@ is expanded when unquoted but in a | |
2017 | context where word splitting is not performed (e.g., on the rhs of an | |
2018 | assignment or in a conditional command). | |
2019 | ||
2020 | o. Bash now quotes command hash table entries that contain shell metacharacters | |
2021 | when displaying hash table contents. | |
2022 | ||
2023 | p. Fixed a potential file descriptor leak when dup2() fails while performing a | |
2024 | redirection. | |
2025 | ||
2026 | q. Fixed a bug that caused directory names evaluated during word completion to | |
2027 | be dequoted twice. | |
2028 | ||
2029 | r. Fixed several bugs which could result in indirect variable expansion and | |
2030 | namerefs creating variables with invalid names or referencing variables | |
2031 | set to the empty string. | |
2032 | ||
2033 | s. Fixed a bug that caused bash to not expand $0 in word expansions where it | |
2034 | should. | |
2035 | ||
2036 | t. Fixed a bug that caused bash to perform process substitution if <( | |
2037 | appeared inside an arithmetic context. | |
2038 | ||
2039 | u. Fixed a bug in extglob pattern parsing that caused slashes in the pattern | |
2040 | to be confused as directory names. | |
2041 | ||
2042 | v. Fixed several bugs with treatment of invisible variables (variables with | |
2043 | attributes that are unset because they have never been assigned values). | |
2044 | ||
2045 | w. Fixed a bug that caused the `read' builtin to not clean up readline's | |
2046 | state when using the -e and -t options together and the read timed out. | |
2047 | ||
2048 | x. Fixed a bug that caused the shell to exit with the wrong (but non-zero) | |
2049 | value if a command was not found or was not executable. | |
2050 | ||
2051 | y. Fixed a bug that caused the `time' reserved word to not be recognized as | |
2052 | such in all contexts where it should have been. | |
2053 | ||
8868edaf | 2054 | z. Fixed a bug that caused the shell to close process substitution file |
a0c0a00f CR |
2055 | descriptors when executing a script without the `#!' leading line. |
2056 | ||
2057 | aa. Fixed a typo that caused the `compat42' shell option to set the wrong | |
2058 | compatibility level. | |
2059 | ||
2060 | bb. The shell now handles process substitution commands with embedded | |
2061 | parentheses the same way as it does when parsing command substitution. | |
2062 | ||
2063 | cc. Fixed a bug that caused nested pipelines and the `lastpipe' shell option | |
2064 | to produce core dumps. | |
2065 | ||
2066 | dd. Fixed a bug that caused patterns containing `*' to match pathnames in cases | |
2067 | where slashes must be matched explicitly. | |
2068 | ||
2069 | ee. Fixed a problem with patterns containing `:' in colon-separated variables | |
2070 | like GLOBIGNORE. | |
2071 | ||
2072 | ff. Fixed a bug that caused indirect variable expansion using indexed arrays to | |
2073 | always use index 0. | |
2074 | ||
2075 | gg. Fixed a parsing problem that caused quoted newlines immediately following a | |
2076 | command substitution to be mishandled in certain cases. | |
2077 | ||
2078 | hh. Fixed a potential buffer overflow on systems without locale_charset or the | |
2079 | bash replacement. | |
2080 | ||
2081 | ii. Fixed a bug that caused background processes to modify the terminal's | |
2082 | process group under certain circumstances. | |
2083 | ||
2084 | jj. Asynchronous commands now always set $? to 0 and are not affected by | |
2085 | whether or not the command's exit status is being inverted. | |
2086 | ||
2087 | kk. Fixed a problem that caused a line ending with an escaped newline and | |
2088 | containingh a prior `eval' to be incorrectly parsed. | |
2089 | ||
2090 | ll. Fixed an issue with programmable completion and `!' in extglob patterns | |
2091 | used as arguments to `compgen -X'. | |
2092 | ||
2093 | mm. Word completion now treats the two-character token `>|' as requiring | |
2094 | filename expansion. | |
2095 | ||
2096 | nn. Bash no longer expands tildes in $PATH elements while in Posix mode. | |
2097 | ||
2098 | oo. Fixed a bug that caused bash to not clean up readline's state, including | |
2099 | the terminal settings, if it received a fatal signal while in a readline() | |
2100 | call (including `read -e' and `read -s'). | |
2101 | ||
2102 | pp. Fixed bug that caused importing shell functions from the environment to | |
2103 | execute additional commands following the function. | |
2104 | ||
2105 | qq. Fixed a bug that caused the parser to return a lookahead character pushed | |
2106 | back by a previous call, even when on another line. | |
2107 | ||
2108 | rr. Fixed a bug that caused many here-documents or many nested case statements | |
2109 | to overflow an internal stack. | |
2110 | ||
2111 | ss. Changed the way bash encodes exported functions for inclusion in the | |
2112 | environment to avoid name collisions with valid variable names and to | |
2113 | indicate that they are exported functions. | |
2114 | ||
2115 | tt. Fixed a bug that could result in an invalid memory access when processing | |
2116 | a here document delimited by end of file or end of string. | |
2117 | ||
2118 | uu. Fixed a bug that could cause an invalid memory access if a command was run | |
2119 | before initializing the job control framework. | |
2120 | ||
2121 | vv. When in Posix mode, bash prints shell function definitions as Posix | |
2122 | specifies them, without the leading `function' keyword. | |
2123 | ||
2124 | ww. The variable attribute display builtins no longer display variables with | |
2125 | invalid names that were imported from the environment. | |
2126 | ||
2127 | xx. Fixed a bug that could allow `break' or `continue' executed from shell | |
2128 | functions to affect loops running outside of the function. | |
2129 | ||
2130 | yy. Fixed a bug that could cause a restricted shell to attempt to import shell | |
2131 | functions from the environment. | |
2132 | ||
2133 | zz. The shell now allows double-quoted identifiers in arithmetic expressions. | |
2134 | ||
2135 | aaa. Fixed a bug that could allow scalar variables subscripted using [@] in | |
2136 | word expansions to be incorrectly quoted. | |
2137 | ||
2138 | bbb. The shell now makes sure to ignore SIGTSTP/SIGTTIN/SIGTTOU in child | |
2139 | processes if they were ignored at shell startup, even if job control is | |
2140 | in effect. | |
2141 | ||
2142 | ccc. Fixed a bug that could cause $* to be split on spaces when IFS is set to | |
2143 | the empty string. | |
2144 | ||
2145 | ddd. Posix says that expanding $* in a pattern context where the expansion is | |
2146 | double-quoted should not treat $* as if it were double quoted. | |
2147 | ||
2148 | eee. Bash now restores getopts' internal state between calls to getopts even if | |
2149 | a shell function declares a local copy of OPTIND. | |
2150 | ||
2151 | fff. Fixed a bug that could cause `history -r' or `history -n' to read identical | |
2152 | lines from the history file more than once. | |
2153 | ||
2154 | ggg. The commands executed by `bind -x' now redisplay at most the final line | |
2155 | of a multi-line prompt, and those commands may return 124 to indicate that | |
2156 | the entire prompt should be redrawn. | |
2157 | ||
2158 | hhh. Fixed a bug that could cause `mapfile' to create variables with invalid | |
2159 | names. | |
2160 | ||
2161 | iii. The shell only goes into debugging mode when --debugger is supplied if | |
2162 | the debugger initialization file is present. | |
2163 | ||
2164 | jjj. Fixed a bug that disallowed an assignment to (implicit) subscript 0 of an | |
2165 | existing array in a declare command that set the readonly attribute. | |
2166 | ||
2167 | kkk. Fixed a bug that inadvertently allowed assignments to FUNCNAME to disable | |
2168 | its special status. | |
2169 | ||
2170 | lll. Appending to an existing array variable using the compound assignment | |
2171 | syntax (var+=(aaa)) should not affect assignments to existing subscripts | |
2172 | appearing in the compound assignment. | |
2173 | ||
2174 | mmm. Fixed a bug that could cause the shell to crash when a variable with a | |
2175 | null value was passed in the temporary environment and the variable's | |
2176 | attributes are modified using `declare' while performing a redirection. | |
2177 | ||
2178 | nnn. Fixed a bug in printf so that a missing precision specifier after a `.' | |
2179 | is treated as 0. | |
2180 | ||
2181 | ooo. Fixed a bug that attempted to use the internal command timing to time | |
2182 | pipeline components if the pipeline elements are separated by newlines. | |
2183 | ||
2184 | ppp. Fixed a bug that caused `declare -al foo=(ONE TWO THREE)' to not lowercase | |
2185 | the values on assignment. | |
2186 | ||
2187 | qqq. Bash does a better job of determining whether or not files are executable | |
2188 | when running on Windows, since the X_OK flag to access(2) is not supported. | |
2189 | ||
2190 | rrr. Fixed a bug that caused some of the shell's internal traps (e.g., ERR) to | |
2191 | be interrupted (and leave incorrect state) by pending SIGINTs. | |
2192 | ||
2193 | sss. Fixed a bug in the bash interface to history expansion to avoid attempting | |
2194 | expansion if the history expansion character occurs in a command | |
2195 | substitution. | |
2196 | ||
2197 | ttt. Fixed a bug that caused the select command to crash if the REPLY variable | |
2198 | ends up empty (e.g., if it's made readonly) | |
2199 | ||
2200 | uuu. Bash handles backslash-quoting of multibyte characters better when quoting | |
2201 | output that is intended to be reused. | |
2202 | ||
2203 | vvv. System-specific changes for: Windows, Cygwin. | |
2204 | ||
2205 | www. Fixes for upper and lower-casing multibyte characters, some locales have | |
2206 | characters whose upper and lowercase versions have different numbers of | |
2207 | bytes. | |
2208 | ||
2209 | xxx. Fixed a bug that caused the ERR trap in a shell function to have the | |
2210 | wrong value for $LINENO. | |
2211 | ||
2212 | yyy. Fixed a bug that resulted in incorrect quoting of regexps for the =~ | |
2213 | operator when an open brace appears without a close brace. | |
2214 | ||
2215 | zzz. Fixed a bug in the array unset operation that caused it to attempt to | |
2216 | parse embedded single and double quotes. | |
2217 | ||
2218 | aaaa. Fixed a bug that caused $* to not expand with the first character of | |
2219 | $IFS as a separator in a context where word splitting will not take | |
2220 | place. | |
2221 | ||
2222 | bbbb. Fixed two bugs that could cause the shell to dereference a null pointer | |
2223 | while attempting to print an error message from arithmetic expansion. | |
2224 | ||
2225 | cccc. Fixed a bug that resulted in short-circuited evaluation when reading | |
2226 | commands from a string ending in an unquoted backslash, or when sourcing | |
2227 | a file that ends with an unquoted backslash. | |
2228 | ||
2229 | dddd. Fixed a bug that resulted in the no-fork optimization not cleaning up | |
2230 | any FIFOs created by process substitution. | |
2231 | ||
2232 | eeee. If the -T option is not set, allow the source builtin and shell functions | |
2233 | to set a DEBUG trap that persists after the sourced file or function | |
2234 | returns, instead of restoring the old (unset) value unconditionally. | |
2235 | ||
2236 | ffff. Fixed a bug that caused redirections to not be undone on some syntax | |
2237 | errors, e.g., when parsing a command substitution. | |
2238 | ||
2239 | gggg. Bash only adds asynchronous commands to the table of background pids | |
2240 | whose status it remembers, to avoid it growing too large during scripts | |
2241 | that create and reap large numbers of child processes. This means that | |
2242 | `wait' no longer works on synchronous jobs, but $? can be used to get | |
2243 | the exit status in those cases. | |
2244 | ||
2245 | hhhh. Bash now checks whether or not a shell script argument is a directory | |
2246 | before trying to open it; Posix says implementations may allow open(2) | |
2247 | on a directory. | |
2248 | ||
2249 | iiii. Fixed a bug that could cause the shell to set the terminal's process | |
2250 | group to a background process group when running as part of a pipeline. | |
2251 | ||
2252 | jjjj. Made a few changes to strings to avoid possible potential negative effects | |
2253 | caused by malicious translations. | |
2254 | ||
2255 | kkkk. Fixed a bug that caused the `unset' builtin to continue to treat its | |
2256 | arguments as functions after unsetting a function when invoked with no | |
2257 | options. | |
2258 | ||
2259 | llll. Fixed a bug that would not replace empty strings using pattern | |
2260 | substitution even if the pattern matched the empty string. | |
2261 | ||
2262 | mmmm. Fixed a bug with word completion that prevented some characters from | |
2263 | being backslash-quoted (backquote, dollar sign). | |
2264 | ||
2265 | nnnn. Fixed a bug that prevented a command from the history re-executed by the | |
2266 | `fc' builtin from setting verbose mode. | |
2267 | ||
2268 | oooo. Fixed a bug that caused the shell to not enable and disable function | |
2269 | tracing with changes to the `extdebug' shell option. | |
2270 | ||
2271 | pppp. Fixed a bug that caused assignments to nameref variables pointing to | |
2272 | unset variables with attributes but no values to create variables with | |
2273 | incorrect names. | |
2274 | ||
2275 | qqqq. Fixed a bug that caused `unset' on nameref variables (without -n) to | |
2276 | unset the wrong variable under certain circumstances. | |
2277 | ||
2278 | rrrr. Fixed a bug that caused close braces occurring in brace expansions within | |
2279 | command substitutions to incorrectly terminate parameter expansions. | |
2280 | ||
2281 | ssss. Fixed a bug that caused `command -p' to temporarily alter $PATH. | |
2282 | ||
2283 | tttt. Fixed a bug that caused interactive shells compiled without job control | |
2284 | to return incorrect status values for child processes when running a | |
2285 | single command that creates enough children to use the entire PID space. | |
2286 | ||
2287 | uuuu. `esac' should not be recognized as a reserved word when it appears as the | |
2288 | second or later pattern in a case statement pattern list. | |
2289 | ||
2290 | vvvv. Fixed a bug that caused the completion code to read past the end of the | |
2291 | readline line buffer while skipping assignment statements to find the | |
2292 | command name. | |
2293 | ||
2294 | wwww. Fixed a bug that caused case statements within loops contained in a | |
2295 | command substitution to be parsed incorrectly. | |
2296 | ||
2297 | xxxx. Fixed a bug that could cause SIGCHLD handling to be delayed after | |
2298 | running `wait' with no arguments and interrupting it with ^C without | |
2299 | a trap handler installed. | |
2300 | ||
2301 | 2. Changes to Readline | |
2302 | ||
2303 | a. A bug that caused vi-mode `.' to be unable to redo `c', `d', and `y' | |
2304 | commands with modifiers was fixed. | |
2305 | ||
2306 | b. Fixed a bug that caused callback mode to dump core when reading a | |
2307 | multiple-key sequence (e.g., arrow keys). | |
2308 | ||
2309 | c. Fixed a bug that caused the redisplay code to erase some of the line when | |
2310 | using horizontal scrolling with incremental search. | |
2311 | ||
2312 | d. Readline's input handler now performs signal processing if read(2) is | |
2313 | interrupted by SIGALRM or SIGVTALRM. | |
2314 | ||
2315 | e. Fixed a problem with revert-all-at-newline freeing freed memory. | |
2316 | ||
2317 | f. Clarified the documentation for the history_quotes_inhibit_expansion | |
2318 | variable to note that it inhibits scanning for the history comment | |
2319 | character and that it only affects double-quoted strings. | |
2320 | ||
2321 | g. Fixed an off-by-one error in the prompt printed when performing searches. | |
2322 | ||
2323 | h. Use pselect(2), if available, to wait for input before calling read(2), so | |
2324 | a SIGWINCH can interrupt it, since it doesn't interrupt read(2). | |
2325 | ||
2326 | i. Some memory leaks caused by signals interrupting filename completion have | |
2327 | been fixed. | |
2328 | ||
2329 | j. Reading EOF twice on a non-empty line causes EOF to be returned, rather | |
2330 | than the partial line. This can cause partial lines to be executed on | |
2331 | SIGHUP, for example. | |
2332 | ||
2333 | k. Fixed a bug concerning deleting multibyte characters from the search | |
2334 | string while performing an incremental search. | |
2335 | ||
2336 | l. Fixed a bug with tilde expanding directory names in filename completion. | |
2337 | ||
2338 | m. Fixed a bug that did not allow binding sequences beginning with a `\'. | |
2339 | ||
2340 | n. Fixed a redisplay bug involving incorrect line wrapping when the prompt | |
2341 | contains a multibyte character in the last screen column. | |
2342 | ||
2343 | o. Fixed a bug that caused history expansion to disregard characters that are | |
2344 | documented to delimit a history event specifier without requiring `:'. | |
2345 | ||
2346 | p. Fixed a bug that could cause reading past the end of a string when reading | |
2347 | the value when binding the set of isearch terminators. | |
2348 | ||
2349 | q. Fixed a bug that caused readline commands that depend on knowing which | |
2350 | key invoked them to misbehave when dispatching key sequences that are | |
2351 | prefixes of other key bindings. | |
2352 | ||
2353 | r. Paren matching now works in vi insert mode. | |
2354 | ||
2355 | 3. New Features in Bash | |
2356 | ||
2357 | a. There is now a settable configuration #define that will cause the shell | |
2358 | to exit if the shell is running setuid without the -p option and setuid | |
2359 | to the real uid fails. | |
2360 | ||
2361 | b. Command and process substitutions now turn off the `-v' option when | |
2362 | executing, as other shells seem to do. | |
2363 | ||
2364 | c. The default value for the `checkhash' shell option may now be set at | |
2365 | compile time with a #define. | |
2366 | ||
2367 | d. The `mapfile' builtin now has a -d option to use an arbitrary character | |
2368 | as the record delimiter, and a -t option to strip the delimiter as | |
2369 | supplied with -d. | |
2370 | ||
2371 | e. The maximum number of nested recursive calls to `eval' is now settable in | |
2372 | config-top.h; the default is no limit. | |
2373 | ||
2374 | f. The `-p' option to declare and similar builtins will display attributes for | |
2375 | named variables even when those variables have not been assigned values | |
2376 | (which are technically unset). | |
2377 | ||
2378 | g. The maximum number of nested recursive calls to `source' is now settable | |
2379 | in config-top.h; the default is no limit. | |
2380 | ||
2381 | h. All builtin commands recognize the `--help' option and print a usage | |
2382 | summary. | |
2383 | ||
2384 | i. Bash does not allow function names containing `/' and `=' to be exported. | |
2385 | ||
2386 | j. The `ulimit' builtin has new -k (kqueues) and -P (pseudoterminals) options. | |
2387 | ||
2388 | k. The shell now allows `time ; othercommand' to time null commands. | |
2389 | ||
2390 | l. There is a new `--enable-function-import' configuration option to allow | |
2391 | importing shell functions from the environment; import is enabled by | |
2392 | default. | |
2393 | ||
2394 | m. `printf -v var ""' will now set `var' to the empty string, as if `var=""' | |
2395 | had been executed. | |
2396 | ||
2397 | n. GLOBIGNORE, the pattern substitution word expansion, and programmable | |
2398 | completion match filtering now honor the value of the `nocasematch' option. | |
2399 | ||
2400 | o. There is a new ${parameter@spec} family of operators to transform the | |
2401 | value of `parameter'. | |
2402 | ||
2403 | p. Bash no longer attempts to perform compound assignment if a variable on the | |
2404 | rhs of an assignment statement argument to `declare' has the form of a | |
2405 | compound assignment (e.g., w='(word)' ; declare foo=$w); compound | |
2406 | assignments are accepted if the variable was already declared as an array, | |
2407 | but with a warning. | |
2408 | ||
2409 | q. The declare builtin no longer displays array variables using the compound | |
2410 | assignment syntax with quotes; that will generate warnings when re-used as | |
2411 | input, and isn't necessary. | |
2412 | ||
2413 | r. Executing the rhs of && and || will no longer cause the shell to fork if | |
2414 | it's not necessary. | |
2415 | ||
2416 | s. The `local' builtin takes a new argument: `-', which will cause it to save | |
2417 | the single-letter shell options and restore their previous values at | |
2418 | function return. | |
2419 | ||
2420 | t. `complete' and `compgen' have a new `-o nosort' option, which forces | |
2421 | readline to not sort the completion matches. | |
2422 | ||
2423 | u. Bash now allows waiting for the most recent process substitution, since it | |
2424 | appears as $!. | |
2425 | ||
2426 | v. The `unset' builtin now unsets a scalar variable if it is subscripted with | |
2427 | a `0', analogous to the ${var[0]} expansion. | |
2428 | ||
2429 | w. `set -i' is no longer valid, as in other shells. | |
2430 | ||
2431 | x. BASH_SUBSHELL is now updated for process substitution and group commands | |
2432 | in pipelines, and is available with the same value when running any exit | |
2433 | trap. | |
2434 | ||
2435 | y. Bash now checks $INSIDE_EMACS as well as $EMACS when deciding whether or | |
2436 | not bash is being run in a GNU Emacs shell window. | |
2437 | ||
2438 | z. Bash now treats SIGINT received when running a non-builtin command in a | |
2439 | loop the way it has traditionally treated running a builtin command: | |
2440 | running any trap handler and breaking out of the loop. | |
2441 | ||
2442 | aa. New variable: EXECIGNORE; a colon-separate list of patterns that will | |
2443 | cause matching filenames to be ignored when searching for commands. | |
2444 | ||
2445 | bb. Aliases whose value ends in a shell metacharacter now expand in a way to | |
2446 | allow them to be `pasted' to the next token, which can potentially change | |
2447 | the meaning of a command (e.g., turning `&' into `&&'). | |
2448 | ||
2449 | 4. New Features in Readline | |
2450 | ||
8868edaf | 2451 | a. The history truncation code now uses the same error recovery mechanism as |
a0c0a00f CR |
2452 | the history writing code, and restores the old version of the history file |
2453 | on error. The error recovery mechanism handles symlinked history files. | |
2454 | ||
2455 | b. There is a new bindable variable, `enable-bracketed-paste', which enables | |
2456 | support for a terminal's bracketed paste mode. | |
2457 | ||
2458 | c. The editing mode indicators can now be strings and are user-settable | |
2459 | (new `emacs-mode-string', `vi-cmd-mode-string' and `vi-ins-mode-string' | |
2460 | variables). Mode strings can contain invisible character sequences. | |
2461 | Setting mode strings to null strings restores the defaults. | |
2462 | ||
2463 | d. Prompt expansion adds the mode string to the last line of a multi-line | |
2464 | prompt (one with embedded newlines). | |
2465 | ||
2466 | e. There is a new bindable variable, `colored-completion-prefix', which, if | |
2467 | set, causes the common prefix of a set of possible completions to be | |
2468 | displayed in color. | |
2469 | ||
2470 | f. There is a new bindable command `vi-yank-pop', a vi-mode version of emacs- | |
2471 | mode yank-pop. | |
2472 | ||
2473 | g. The redisplay code underwent several efficiency improvements for multibyte | |
2474 | locales. | |
2475 | ||
2476 | h. The insert-char function attempts to batch-insert all pending typeahead | |
2477 | that maps to self-insert, as long as it is coming from the terminal. | |
2478 | ||
2479 | i. rl_callback_sigcleanup: a new application function that can clean up and | |
2480 | unset any state set by readline's callback mode. Intended to be used | |
2481 | after a signal. | |
2482 | ||
2483 | ------------------------------------------------------------------------------ | |
ac50fbac CR |
2484 | This document details the changes between this version, bash-4.3-release, and |
2485 | the previous version, bash-4.3-rc2. | |
2486 | ||
2487 | 1. Changes to Bash | |
2488 | ||
2489 | a. Only Posix-mode shells should exit on an assignment failure in the | |
2490 | temporary environment preceding a special builtin. This is how it's been | |
2491 | documented. | |
2492 | ||
2493 | b. Fixed a bug that caused a failed special builtin to not exit a posix-mode | |
2494 | shell if the failing builtin was on the LHS of a && or ||. | |
2495 | ||
2496 | c. Changed the handling of unquoted backslashes in regular expressions to be | |
2497 | closer to bash-4.2. | |
2498 | ||
2499 | d. globstar (**) no longer traverses symbolic links that resolve to | |
2500 | directories. This eliminates some duplicate entries. | |
2501 | ||
2502 | e. Fixed a bug that caused a SIGCHLD trap handler to not be able to change the | |
2503 | SIGCHLD disposition. | |
2504 | ||
2505 | f. Fixed a bug that caused a crash when -x was enabled and a command | |
2506 | contained a printable multibyte (wide) character. | |
2507 | ||
2508 | g. Fixed a bug that caused an interactive shell without line editing enabled | |
2509 | to read invalid data after receiving a SIGINT. | |
2510 | ||
2511 | h. Fixed a bug that caused command word completion to fail if the directory in | |
2512 | $PATH where the completion would be found contained single or double quotes. | |
2513 | ||
2514 | i. Fixed a bug that caused a shell with -v enabled to print commands in $() | |
2515 | multiple times. | |
2516 | ||
2517 | 2. Changes to Readline | |
2518 | ||
2519 | a. Fixed a bug that caused `undo' to reference freed memory or null pointers. | |
2520 | ||
2521 | 3. New Features in Bash | |
2522 | ||
2523 | a. The [[ -v ]] option now understands array references (foo[1]) and returns | |
2524 | success if the referenced element has a value. | |
2525 | ||
2526 | ------------------------------------------------------------------------------ | |
2527 | This document details the changes between this version, bash-4.3-rc2, and the | |
2528 | previous version, bash-4.3-rc1. | |
2529 | ||
2530 | 1. Changes to Bash | |
2531 | ||
2532 | a. Fixed a bug that left variables set by printf -v marked as invisible. | |
2533 | ||
2534 | b. Fixed an off-by-one error in a job control warning message. | |
2535 | ||
2536 | c. Fixed a bug that caused the shell to crash after declaring a nameref variable | |
2537 | without a value. | |
2538 | ||
2539 | d. Fixed a bug that caused asynchronous commands to not set $? correctly. | |
2540 | ||
2541 | e. Fixed a bug that caused out-of-order execution when executing aliases with | |
2542 | embedded newlines containing `.' commands. | |
2543 | ||
2544 | f. Fixed a bug that caused error messages generated by expansion errors in | |
2545 | `for' commands to have the wrong line number. | |
2546 | ||
2547 | g. Fixed a bug that caused the `wait' builtin to not be interruptible in an | |
2548 | interactive shell with job control enabled. | |
2549 | ||
2550 | h. Fixed a bug that caused SIGINT and SIGQUIT to not be trappable in | |
2551 | asynchronous subshell commands. | |
2552 | ||
2553 | i. Bash now requires that the value assigned to a nameref variable be a valid | |
2554 | shell identifier (variable name or array reference). | |
2555 | ||
2556 | j. Converting an existing variable to a nameref variable now turns off the | |
2557 | -i/-l/-u/-c attributes. | |
2558 | ||
2559 | k. Displaying a nameref variable with `declare -p' now displays the nameref | |
2560 | variable and its value rather than following the nameref chain. | |
2561 | ||
2562 | l. Fixed a problem with interrupt handling that caused a second and subsequent | |
2563 | SIGINT to be ignored by interactive shells. | |
2564 | ||
2565 | m. Fixed a bug that caused certain positional parameter and array expansions | |
2566 | to mishandle (discard) null positional parameters and array elements. | |
2567 | ||
2568 | n. The shell no longer blocks receipt of signals while running trap handlers | |
2569 | for those signals, and allows most trap handlers to be run recursively | |
2570 | (running trap handlers while a trap handler is executing). | |
2571 | ||
2572 | o. The shell now handles backslashes in regular expression arguments to the | |
2573 | [[ command's =~ operator slightly differently, resulting in more | |
2574 | consistent behavior. | |
2575 | ||
2576 | 2. Changes to Readline | |
2577 | ||
2578 | a. Fixed a bug that could cause readline to crash and seg fault attempting to | |
2579 | expand an empty history entry. | |
2580 | ||
2581 | b. Fixed a bug that caused a bad entry in the $LS_COLORS variable to abort all | |
2582 | color processing but leave color enabled. | |
2583 | ||
2584 | c. Fixed a bug that caused display problems with multi-line prompts containing | |
2585 | invisible characters on multiple lines. | |
2586 | ||
2587 | d. Fixed a bug that caused effects made by undoing changes to a history line to | |
2588 | be discarded. | |
2589 | ||
2590 | 3. New Features in Bash | |
2591 | ||
2592 | 4. New Features in Readline | |
2593 | ||
2594 | a. When creating shared libraries on Mac OS X, the pathname written into the | |
2595 | library (install_name) no longer includes the minor version number. | |
2596 | ------------------------------------------------------------------------------ | |
2597 | This document details the changes between this version, bash-4.3-rc1, and the | |
2598 | previous version, bash-4.3-beta2. | |
2599 | ||
2600 | 1. Changes to Bash | |
2601 | ||
2602 | a. Fixed a bug in bash completion that caused a tilde to be expanded even if | |
2603 | the `direxpand' option was not enabled. | |
2604 | ||
2605 | b. Fixed a potential bug that could cause corrupted input in interactive shells | |
2606 | running without line editing and with `ignoreeof' enabled. | |
2607 | ||
2608 | c. Fixed a bug that could cause failures when opening pipes back to shells | |
2609 | created to run process substitutions. | |
2610 | ||
2611 | d. Fixed a bug that caused an assignment to TEXTDOMAIN to require TEXTDOMAINDIR | |
2612 | to be set in order to actually change the current text domain. | |
2613 | ||
2614 | e. Changed the way redirections are printed to avoid confusion when the target | |
2615 | of an output redirection is a process substitution beginning with `>'. | |
2616 | ||
2617 | 2. Changes to Readline | |
2618 | ||
2619 | a. Shared library building is now supported on Mac OS X 10.9 (Darwin 13). | |
2620 | ||
2621 | 3. New Features in Bash | |
2622 | ||
2623 | a. `cd' has a new `-@' option to browse a file's extended attributes on | |
2624 | systems that support O_XATTR. | |
2625 | ||
2626 | 4. New Features in Readline | |
2627 | ||
2628 | a. There are additional default key bindings for MinGW32 | |
2629 | ||
2630 | ------------------------------------------------------------------------------ | |
2631 | This document details the changes between this version, bash-4.3-beta2, and the | |
2632 | previous version, bash-4.3-beta. | |
2633 | ||
2634 | 1. Changes to Bash | |
2635 | ||
2636 | a. Fixed a bug that caused assignment to an unset variable using a negative | |
2637 | subscript to result in a segmentation fault. | |
2638 | ||
2639 | b. Fixed a bug that caused assignment to a string variable using a negative | |
2640 | subscript to use the incorrect index. | |
2641 | ||
2642 | c. Fixed a bug that caused some strings to be interpreted as invalid | |
2643 | extended globbing expressions when used with the help builtin. | |
2644 | ||
2645 | d. Fixed a bug that caused an attempt to trap a signal whose disposition | |
2646 | cannot be changed to reference uninitialized memory. | |
2647 | ||
2648 | e. Command completion now skips assignment statements preceding a command | |
2649 | name and completes the command. | |
2650 | ||
2651 | f. Fixed a bug that caused `compgen -f' in a non-interactive shell to dump | |
2652 | core under certain circumstances. | |
2653 | ||
2654 | g. Fixed a bug that caused the `read -N' to misbehave when the input stream | |
2655 | contains 0xff. | |
2656 | ||
2657 | 2. Changes to Readline | |
2658 | ||
2659 | a. Changed message when an incremental search fails to include "failed" in | |
2660 | the prompt and display the entire search string instead of just the last | |
2661 | matching portion. | |
2662 | ||
2663 | b. Fixed a bug that caused an arrow key typed to an incremental search prompt | |
2664 | to process the key sequence incorrectly. | |
2665 | ||
2666 | c. Additional key bindings for arrow keys on MinGW. | |
2667 | ||
2668 | 3. New Features in Bash | |
2669 | ||
2670 | a. The help builtin now attempts substring matching (as it did through | |
2671 | bash-4.2) if exact string matching fails. | |
2672 | ||
2673 | b. The fc builtin now interprets -0 as the current command line. | |
2674 | ||
2675 | c. Completing directory names containing shell variables now adds a trailing | |
2676 | slash if the expanded result is a directory. | |
2677 | ||
2678 | 4. New Features in Readline | |
2679 | ||
2680 | a. rl_change_environment: new application-settable variable that controls | |
2681 | whether or not Readline modifies the environment (currently readline | |
2682 | modifies only LINES and COLUMNS). | |
2683 | ||
2684 | ------------------------------------------------------------------------------ | |
2685 | This document details the changes between this version, bash-4.3-beta, and the | |
2686 | previous version, bash-4.3-alpha. | |
2687 | ||
2688 | 1. Changes to Bash | |
2689 | ||
2690 | a. Fixed a bug in the prompt directory name "trimming" code that caused | |
2691 | memory corruption and garbled the results. | |
2692 | ||
2693 | b. Fixed a bug that caused single quotes that resulted from $'...' quoting | |
2694 | in the replacement portion of a double-quoted ${word/pat/rep} expansion | |
2695 | to be treated as quote characters. | |
2696 | ||
2697 | c. Fixed a bug that caused assignment statements preceding a command word to | |
2698 | result in assignment statements following a declaration command to not be | |
2699 | expanded like assignment statements. | |
2700 | ||
2701 | d. Fixed a bug with variable search order in the presence of local variables | |
2702 | with the same name as variables in the temporary environment supplied to | |
2703 | a shell function. | |
2704 | ||
2705 | e. Fixed a bug that caused constructs like 1<(2) to be interpreted as process | |
2706 | substitutions even in an arithmetic context. | |
2707 | ||
2708 | f. Fixed several cases where `invisible' variables (variables with attributes | |
2709 | but no values, which are technically unset) were treated incorrectly. | |
2710 | ||
2711 | g. Fixed a bug that caused group commands in pipelines that were not the | |
2712 | last element to not run the EXIT trap. | |
2713 | ||
2714 | h. Fixed a bug that caused `unset -n' to not unset a nameref variable in | |
2715 | certain cases. | |
2716 | ||
2717 | i. Fixed the nameref circular reference checking to be less strict and only | |
2718 | disallow a nameref variable with the same value as its name at the global | |
2719 | scope. | |
2720 | ||
2721 | j. Fixed a bug that caused trap handlers to be executed recursively, | |
2722 | corrupting internal data structures. | |
2723 | ||
2724 | k. Fixed a bug that could result in bash not compiling if certain options were | |
2725 | not enabled. | |
2726 | ||
2727 | l. Fixed a bug that caused the arithmetic expansion code to attempt variable | |
2728 | assignments when operator precedence prohibited them. | |
2729 | ||
2730 | m. Word expansions like ${foo##bar} now understand indirect variable references. | |
2731 | ||
2732 | n. Fixed a bug that caused `declare -fp name' to not display a function | |
2733 | definition. | |
2734 | ||
2735 | o. Fixed a bug that caused asynchronous child processes to modify the stdin | |
2736 | file pointer when bash was using it to read a script, which modified the | |
2737 | parent's value as well. | |
2738 | ||
2739 | 2. Changes to Readline | |
2740 | ||
2741 | a. Fixed a bug in vi mode that caused the arrow keys to set the saved last | |
2742 | vi-mode command to the wrong value. | |
2743 | ||
2744 | b. Fixed a bug that caused double-quoted strings to be scanned incorrectly | |
2745 | when being used as the value of a readline variable assignment. | |
2746 | ||
2747 | c. Fixed a bug with vi mode that prevented `.' from repeating a command | |
2748 | entered on a previous line (command). | |
2749 | ||
2750 | d. Fixed a bug that could cause completion to core dump if it was interrupted | |
2751 | by a signal. | |
2752 | ||
2753 | e. Readline now sends the meta-key enable string to the terminal if the | |
2754 | terminal has been successfully initialized. | |
2755 | ||
2756 | f. Readline now calls the signal hook after resizing the terminal when it | |
2757 | receives a SIGWINCH. | |
2758 | ||
2759 | g. Fixed a bug that could cause the history list code to perform an out-of- | |
2760 | bounds array reference if the history list is empty. | |
2761 | ||
2762 | 3. New Features in Bash | |
2763 | ||
2764 | a. Shells started to run process substitutions now run any trap set on EXIT. | |
2765 | ||
2766 | b. There is now a configure-time option to enable the globasciiranges option | |
2767 | by default. | |
2768 | ||
2769 | c. The read builtin now checks its first variable argument for validity before | |
2770 | trying to read any input. | |
2771 | ||
2772 | ------------------------------------------------------------------------------ | |
2773 | This document details the changes between this version, bash-4.3-alpha, | |
2774 | and the previous version, bash-4.2-release. | |
2775 | ||
2776 | 1. Changes to Bash | |
2777 | ||
2778 | a. Fixed several bugs concerning incomplete bracket expressions in filename | |
2779 | generation (globbing) patterns. | |
2780 | ||
2781 | b. Fixed a bug with single quotes and WORD in ${param op WORD} when running | |
2782 | in Posix mode. | |
2783 | ||
2784 | c. Fixed a bug that caused the pattern removal and pattern substitution word | |
2785 | expansions and case statement word expansion to not match the empty string. | |
2786 | ||
2787 | d. Fixed a bug that caused the tzset() function to not work after changing | |
8868edaf | 2788 | the TZ environment variable. |
ac50fbac CR |
2789 | |
2790 | e. Fixed a bug that caused the RHS of an assignment statement to undergo | |
2791 | word splitting when it contained an unquoted $@. | |
2792 | ||
2793 | f. Fixed bugs that caused the shell to not react to a SIGINT sent while | |
2794 | waiting for a child process to exit. | |
2795 | ||
2796 | g. Bash doesn't try to run things in a signal handler context when it gets a | |
2797 | signal (SIGINT/SIGHUP/etc) while reading input using readline but still | |
2798 | be responsive to terminating signals. | |
2799 | ||
2800 | h. Fixed a bug that caused bash to go into an infinite loop if a filename | |
2801 | to be matched contained an invalid multibyte character. | |
2802 | ||
2803 | i. Fixed a bug that caused PS4 to end up being truncated if it is longer | |
2804 | than 128 bytes. | |
2805 | ||
2806 | j. Fixed a bug that caused brace expansion to not skip over double-quoted | |
2807 | command substitution. | |
2808 | ||
2809 | k. System-specific updates for: DJGPP, HP/UX, Mac OS X | |
2810 | ||
2811 | l. Fixed a bug in displaying commands that caused redirections to be associated | |
2812 | with the wrong part of the command. | |
2813 | ||
2814 | m. Fixed the coproc cleanup to unset the appropriate shell variables when a | |
2815 | coproc terminates. | |
2816 | ||
2817 | n. Fixed a bug that caused `fc' to dump core due to incorrect calculation of | |
2818 | the last history entry. | |
2819 | ||
2820 | o. Added workarounds for FreeBSD's implementation of faccessat/eaccess and | |
2821 | `test -x'. | |
2822 | ||
2823 | p. Fixed a bug that caused the shell to not match patterns containing | |
2824 | control-A. | |
2825 | ||
2826 | q. Fixed a bug that could result in doubled error messages when the `printf' | |
2827 | builtin got a write error. | |
2828 | ||
2829 | r. Fixed a bug that caused the shell to not correctly expand words containing | |
2830 | multiple consecutive quoted empty strings (""""""aa). | |
2831 | ||
2832 | s. Fixed a bug that caused the shell to not correctly parse multi-line | |
2833 | process substitutions containing comments and quoted strings. | |
2834 | ||
2835 | t. Fixed a problem with the bash malloc's internal idea of the top of the | |
2836 | memory heap that resulted in incorrect decisions to try to reduce the | |
2837 | break and give memory back to the kernel. | |
2838 | ||
8868edaf | 2839 | u. There are changes to the expansions performed on compound array assignments, |
ac50fbac CR |
2840 | in an effort to make foo=( [ind1]=bar [ind2]=baz ) identical to |
2841 | foo[ind1]=bar foo[ind2]=baz. | |
2842 | ||
2843 | v. Bash now reports an error if `read -a name' is used when `name' is an | |
2844 | existing associative array. | |
2845 | ||
2846 | w. Fixed a bug that allowed an attempted assignment to a readonly variable | |
2847 | in an arithmetic expression to not return failure. | |
2848 | ||
2849 | x. Fixed several bugs that caused completion functions to be invoked even when | |
2850 | the cursor was before the first word in the command. | |
2851 | ||
2852 | y. Fixed a bug that caused parsing a command substitution to overwrite the | |
2853 | parsing state associated with the complete input line. | |
2854 | ||
2855 | z. Fixed several bugs with the built-in snprintf replacement and field widths | |
2856 | and floating point. | |
2857 | ||
2858 | aa. Fixed a bug that caused incorrect offset calculations and input buffer | |
2859 | corruption when reading files longer than 2^31 bytes. | |
2860 | ||
2861 | bb. Fixed several bugs where bash performed arithmetic evaluation in contexts | |
2862 | where evaluation is suppressed. | |
2863 | ||
2864 | cc. Fixed a bug that caused bash to close FIFOs used for process substitution | |
2865 | too early when a shell function was executing, but protect against using | |
2866 | all file descriptors when the shell functions are invoked inside loops. | |
2867 | ||
2868 | dd. Added checks for printable (and non-printable) multibyte characters for | |
2869 | use in error messages. | |
2870 | ||
2871 | ee. Fixed a bug that caused ^O (operate-and-get-next) to not work correctly | |
2872 | at the end of the history list. | |
2873 | ||
2874 | ff. Fixed a bug that caused command-oriented history to incorrectly combine | |
2875 | here documents into one line. | |
2876 | ||
2877 | gg. Fixed a bug that caused importing SHELLOPTS from the environment into a | |
2878 | Posix-mode shell to print an error message and refuse to parse it. | |
2879 | ||
2880 | hh. Fixed a bug that caused the shell to delete an extra history entry when | |
2881 | using `history -s'. | |
2882 | ||
2883 | ii. Fixed a bug that caused floating-point exceptions and overflow errors | |
2884 | for the / and % arithmetic operators when using INTMAX_MIN and -1. | |
2885 | ||
2886 | jj. Fixed a bug that caused parsing errors when reading an arithmetic for | |
2887 | loop inside a command substitution. | |
2888 | ||
2889 | kk. Fixed a bug that caused a readonly function to be unset when unset was | |
2890 | called without the -f or -v option. | |
2891 | ||
2892 | ll. Fixed several bugs in the code that quotes characters special to regular | |
2893 | expressions when used in a quoted string on the RHS of the =~ operator | |
2894 | to the [[ command. | |
2895 | ||
2896 | mm. Fixed a bug that caused redirections to fail because the file descriptor | |
2897 | limit was set to a value less than 10. | |
2898 | ||
2899 | nn. Fixed a bug that caused the `read' builtin to execute code in a signal | |
2900 | handler context if read timed out. | |
2901 | ||
2902 | oo. Fixed a bug that caused extended globbing patterns to not match files | |
2903 | beginning with `.' correctly when a `.' was explicitly supplied in the | |
2904 | pattern. | |
2905 | ||
2906 | pp. Fixed a bug that caused key sequences longer than two characters to not | |
2907 | work when used with `bind -x'. | |
2908 | ||
2909 | qq. Fixed a bug that resulted in redefined functions having the wrong source | |
2910 | file names in BASH_SOURCE. | |
2911 | ||
2912 | rr. Fixed a bug that caused the read builtin to assign null strings to variables | |
2913 | when using `read -N', which caused core dumps when referenced | |
2914 | ||
2915 | ss. Fixed a bug that caused `bash -m script' to not enable job control while | |
2916 | running the script. | |
2917 | ||
2918 | tt. Fixed a bug that caused `printf -v var' to dump core when used with the | |
2919 | %b format code. | |
2920 | ||
2921 | uu. Fixed a bug that caused the shell to exit with the wrong status if -e was | |
2922 | active and the shell exited on a substitution error. | |
2923 | ||
2924 | vv. Fixed a bug that caused the shell to seg fault if an array variable with | |
2925 | the same name as an existing associative array was implicitly created by | |
2926 | an assignment (declare a[n]=b). | |
2927 | ||
2928 | ww. Fixed a bug that caused a redirection to misbehave if the number specified | |
2929 | for a file descriptor overflows an intmax_t. | |
2930 | ||
2931 | xx. Fixed several bugs with the handling of valid and invalid unicode character | |
2932 | values when used with the \u and \U escape sequences to printf and $'...'. | |
2933 | ||
2934 | yy. Fixed a bug that caused tildes to not be escaped in expanded filenames, | |
2935 | making them subject to later expansion. | |
2936 | ||
2937 | zz. When using the pattern substitution word expansion, bash now runs the | |
2938 | replacement string through quote removal, since it allows quotes in that | |
2939 | string to act as escape characters. This is not backwards compatible, so | |
2940 | it can be disabled by setting the bash compatibility mode to 4.2. | |
2941 | ||
2942 | aaa. Fixed the rest of the cases where the shell runs non-allowed code in a | |
2943 | signal handler context. | |
2944 | ||
2945 | bbb. Fixed a bug that caused spurious DEL characters (\177) to appear in | |
2946 | double-quoted expansion where the RHS is evaluated to the empty string. | |
2947 | ||
2948 | ccc. Fixed a bug that caused the use of the shell's internal random number | |
2949 | generator for temporary file names to perturb the random number | |
2950 | sequence. | |
2951 | ||
2952 | ddd. Fixed several bugs that caused `declare -g' to not set the right global | |
2953 | variables or to misbehave when declaring global indexed arrays. | |
2954 | ||
2955 | eee. Fixed a logic bug that caused extended globbing in a multibyte locale to | |
2956 | cause failures when using the pattern substititution word expansions. | |
2957 | ||
2958 | fff. Fixed a bug that caused the `lastpipe' option to corrupt the file | |
2959 | descriptor used to read the script. | |
2960 | ||
2961 | ggg. Fixed a bug that causes the shell to delete DEL characters in the | |
2962 | expanded value of variables used in the same quoted string as variables | |
2963 | that expand to nothing. | |
2964 | ||
2965 | hhh. Fixed a bug that caused the shell to assign the wrong value from an | |
2966 | assignment like (( x=7 )) when `x' was an existing array variable. | |
2967 | ||
2968 | iii. Fixed a bug that caused the shell to misbehave when generating sequences | |
2969 | and the boundary values overflow an intmax_t. | |
2970 | ||
2971 | jjj. Fixed a bug caused expansion errors if an expansion of "$@" appeared | |
2972 | next to another expansion (e.g.. "${@}${x}"). | |
2973 | ||
2974 | kkk. Fixed a potential buffer overflow bug when performing /dev/fd expansion. | |
2975 | ||
2976 | lll. Fixed a bug that resulted in an extra semicolon being added to compound | |
2977 | assignments when they were added to the history list. | |
2978 | ||
2979 | mmm. Fixed a bug that caused mapfile to read one extra line from the input. | |
2980 | ||
2981 | nnn. Fixed a bug that caused the mail checking code to use uninitialized | |
2982 | values. | |
2983 | ||
2984 | ooo. Fixed a bug that prevented history timestamps from being saved if the | |
2985 | history comment character is unset. | |
2986 | ||
2987 | ppp. Fixed a bug that caused the case-modifying expansions to not work with | |
2988 | multibyte characters. | |
2989 | ||
2990 | qqq. Fixed a bug that caused the edit-and-execute bindable readline command | |
2991 | to see the wrong data if invoked in the middle of a multi-line quoted | |
2992 | string. | |
2993 | ||
2994 | rrr. Fixed a bug that resulted in the shell returning the wrong exit status | |
2995 | for a background command on systems that recycle PIDs very quickly. | |
2996 | ||
2997 | sss. Fixed a bug that caused asynchronous group commands to not run any EXIT | |
2998 | trap defined in the body of the command. | |
2999 | ||
3000 | ttt. Fixed a bug that caused `eval "... ; return"' to not clean up properly. | |
3001 | ||
3002 | uuu. Fixed a bug that caused the shell to dump core if `read' reads an escaped | |
3003 | IFS whitespace character. | |
3004 | ||
3005 | vvv. Fixed a bug that caused BASH_COMMAND to be set to an incorrect value when | |
3006 | executing a (...) subshell. | |
3007 | ||
3008 | www. Fixed a couple of pointer aliasing bugs with the token string in arithmetic | |
3009 | evaluation. | |
3010 | ||
3011 | xxx. Fixed a bug with parsing multi-line command substitutions when reading | |
3012 | the `do' keyword followed by whitespace. | |
3013 | ||
3014 | yyy. Fixed a bug that caused the shell to seg fault if the time given to the | |
3015 | printf %(...)T format overflowed the value accepted by localtime(3). | |
3016 | ||
3017 | zzz. Fixed a problem with displaying help topics in two columns when the | |
3018 | translated text contained multibyte characters. | |
3019 | ||
3020 | aaaa. Fixed a bug with the extended globbing pattern matcher where a `*' was | |
3021 | followed by a negated extended glob pattern. | |
3022 | ||
3023 | bbbb. Fixed a race condition with short-lived coproc creation and reaping that | |
3024 | caused the child process to be reaped before the various coproc shell | |
3025 | variables were initialized. | |
3026 | ||
3027 | cccc. Fixed a bug where turning off `errexit' in command substitution subshells | |
3028 | was not reflected in $SHELLOPTS. | |
3029 | ||
3030 | dddd. Partially fixed an inconsistency in how the shell treated shell | |
3031 | functions run from an EXIT trap. | |
3032 | ||
3033 | eeee. Fixed a bug in how the shell invalidated FIFOs used for process | |
3034 | substitution when executing a pipeline (once rather than in every child). | |
3035 | ||
3036 | ffff. Fixed a bug that occurred when expanding a special variable ($@, $*) | |
3037 | within double quotes and the expansion resulted in an empty string. | |
3038 | ||
3039 | gggg. Fixed bugs with executing a SIGCHLD trap handler to make sure that it's | |
3040 | executed once per exited child. | |
3041 | ||
3042 | hhhh. Fixed a bug that caused `declare' and `test' to find variables that | |
3043 | had been given attributes but not assigned values. Such variables are | |
3044 | not set. | |
3045 | ||
3046 | iiii. Fixed a bug that caused commands in process substitutions to not look in | |
3047 | the local temporary environment when performing word expansions. | |
3048 | ||
3049 | jjjj. Fixed several problems with globstar expansions (**/**) returning null | |
3050 | filenames and multiple instances of the same pathname. | |
3051 | ||
3052 | kkkk. Fixed an oversight that did not allow the exit status of `coproc' to | |
3053 | be inverted using `!'. | |
3054 | ||
3055 | llll. Fixed a bug that caused the -e option to be re-enabled using `set -e' | |
3056 | even when executing in a context where -e is ignored. | |
3057 | ||
3058 | mmmm. Fixed a (mostly theoretical) bug with input lines longer than SIZE_MAX. | |
3059 | ||
3060 | nnnn. Fixed a bug that could result in double evaluation of command | |
3061 | substitutions when they appear in failed redirections. | |
3062 | ||
3063 | oooo. Fixed a bug that could cause seg faults during `mapfile' callbacks if | |
3064 | the callback unsets the array variable mapfile is using. | |
3065 | ||
3066 | pppp. Fixed several problems with variable assignments using ${var:=value} | |
3067 | when the variable assignment is supposed to have side effects. | |
3068 | ||
3069 | qqqq. Fixed a bug that caused a failure of an assignment statement preceding a | |
3070 | builtin caused the next invocation of a special builtin to exit the shell. | |
3071 | ||
3072 | rrrr. Fixed several problems with IFS when it appears in the temporary environment | |
3073 | and is used in redirections. | |
3074 | ||
3075 | ssss. Fixed a problem that caused IFS changes using ${IFS:=value} to modify | |
3076 | how preceding expansions were split. | |
3077 | ||
3078 | tttt. Fixed a problem that caused subshells to not run an EXIT trap they set. | |
3079 | ||
3080 | uuuu. Fixed a problem that caused shells started in posix mode to attempt to | |
3081 | import shell functions with invalid names from the environment. We now | |
3082 | print a warning. | |
3083 | ||
3084 | vvvv. Worked around a kernel problem that caused SIGCHLD to interrupt open(2) | |
3085 | on a FIFO used for process substitution, even if the SIGCHLD handler was | |
3086 | installed with the SA_RESTART flag. | |
3087 | ||
3088 | wwww. Fixed a problem that resulted in inconsistent expansion of $* and ${a[*]}. | |
3089 | ||
3090 | xxxx. Fixed a problem that caused `read -t' to crash when interrupted by | |
3091 | SIGINT. | |
3092 | ||
3093 | yyyy. Fixed a problem that caused pattern removal to fail randomly because the | |
3094 | pattern matcher read beyond the end of a string. | |
3095 | ||
3096 | zzzz. Fixed a bug that caused core dumps when shell functions tried to create | |
3097 | local shadow copies of special variables like GROUPS. | |
3098 | ||
3099 | aaaaa. Fixed a bug that caused SIGTERM to be occasionally lost by children of | |
3100 | interactive shells when it arrived before the child process reset the | |
3101 | handler from SIG_DFL. | |
3102 | ||
3103 | bbbbb. Fixed a bug that caused redirections like <&n- to leave file descriptor | |
3104 | n closed if executed with a builtin command. | |
3105 | ||
3106 | ccccc. Fixed a bug that caused incorrect completion quoting when completing a | |
3107 | word containing a globbing character with `show-all-if-ambiguous' set. | |
3108 | ||
3109 | ddddd. Fixed a bug that caused printf's %q format specifier not to quote a | |
3110 | tilde even if it appeared in a location where it would be subject to | |
3111 | tilde expansion. | |
3112 | ||
3113 | 2. Changes to Readline | |
3114 | ||
3115 | a. Fixed a bug that did not allow the `dd', `cc', or `yy' vi editing mode | |
3116 | commands to work on the entire line. | |
3117 | ||
3118 | b. Fixed a bug that caused redisplay problems with prompts longer than 128 | |
3119 | characters and history searches. | |
3120 | ||
3121 | c. Fixed a bug that caused readline to try and run code to modify its idea | |
3122 | of the screen size in a signal handler context upon receiving a SIGWINCH. | |
3123 | ||
3124 | d. Fixed a bug that caused the `meta' key to be enabled beyond the duration | |
3125 | of an individual call top readline(). | |
3126 | ||
3127 | e. Added a workaround for a wcwidth bug in Mac OS X that caused readline's | |
3128 | redisplay to mishandle zero-width combining characters. | |
3129 | ||
3130 | f. Fixed a bug that caused readline to `forget' part of a key sequence when | |
3131 | a multiple-key sequence caused it to break out of an incremental search. | |
3132 | ||
3133 | g. Fixed bugs that caused readline to execute code in a signal handler | |
3134 | context if interrupted while reading from the file system during completion. | |
3135 | ||
3136 | h. Fixed a bug that caused readline to `forget' part of a key sequence when | |
3137 | reading an unbound multi-character key sequence. | |
3138 | ||
3139 | i. Fixed a bug that caused Readline's signal handlers to be installed beyond | |
3140 | the bounds of a single call to readline(). | |
3141 | ||
3142 | j. Fixed a bug that caused the `.' command to not redo the most recent `R' | |
3143 | command in vi mode. | |
3144 | ||
3145 | k. Fixed a bug that caused ignoring case in completion matches to result in | |
3146 | readline using the wrong match. | |
3147 | ||
3148 | l. Paren matching now works in vi insert mode. | |
3149 | ||
3150 | m. Fix menu-completion to make show-all-if-ambiguous and menu-complete-display-prefix | |
3151 | work together. | |
3152 | ||
3153 | n. Fixed a bug that didn't allow the `cc', `dd', or `yy' commands to be redone | |
3154 | in vi editing mode. | |
3155 | ||
3156 | o. Fixed a bug that caused the filename comparison code to not compare | |
3157 | multibyte characters correctly when using case-sensitive or case-mapping | |
3158 | comparisons. | |
3159 | ||
3160 | p. Fixed the input reading loop to call the input hook function only when there | |
3161 | is no terminal input available. | |
3162 | ||
3163 | q. Fixed a bug that caused binding a macro to a multi-character key sequence | |
3164 | where the sequence and macro value share a common prefix to not perform | |
3165 | the macro replacement. | |
3166 | ||
3167 | r. Fixed several redisplay errors with multibyte characters and prompts | |
3168 | containing invisible characters when using horizontal scrolling. | |
3169 | ||
3170 | s. Fixed a bug that caused redisplay errors when trying to overwrite | |
3171 | existing characters using multibyte characters. | |
3172 | ||
3173 | 3. New Features in Bash | |
3174 | ||
3175 | a. The `helptopic' completion action now maps to all the help topics, not just | |
3176 | the shell builtins. | |
3177 | ||
3178 | b. The `help' builtin no longer does prefix substring matching, so `help read' | |
3179 | does not match `readonly'. | |
3180 | ||
3181 | c. The shell can be compiled to not display a message about processes that | |
3182 | terminate due to SIGTERM. | |
3183 | ||
3184 | d. Non-interactive shells now react to the setting of checkwinsize and set | |
3185 | LINES and COLUMNS after a foreground job exits. | |
3186 | ||
3187 | e. There is a new shell option, `globasciiranges', which, when set to on, | |
3188 | forces globbing range comparisons to use character ordering as if they | |
3189 | were run in the C locale. | |
3190 | ||
3191 | f. There is a new shell option, `direxpand', which makes filename completion | |
3192 | expand variables in directory names in the way bash-4.1 did. | |
3193 | ||
3194 | g. In Posix mode, the `command' builtin does not change whether or not a | |
3195 | builtin it shadows is treated as an assignment builtin. | |
3196 | ||
3197 | h. The `return' and `exit' builtins accept negative exit status arguments. | |
3198 | ||
3199 | i. The word completion code checks whether or not a filename containing a | |
3200 | shell variable expands to a directory name and appends `/' to the word | |
3201 | as appropriate. The same code expands shell variables in command names | |
3202 | when performing command completion. | |
3203 | ||
3204 | j. In Posix mode, it is now an error to attempt to define a shell function | |
3205 | with the same name as a Posix special builtin. | |
3206 | ||
3207 | k. When compiled for strict Posix conformance, history expansion is disabled | |
3208 | by default. | |
3209 | ||
3210 | l. The history expansion character (!) does not cause history expansion when | |
3211 | followed by the closing quote in a double-quoted string. | |
3212 | ||
3213 | m. `complete' and its siblings compgen/compopt now takes a new `-o noquote' | |
3214 | option to inhibit quoting of the completions. | |
3215 | ||
3216 | n. Setting HISTSIZE to a value less than zero causes the history list to be | |
3217 | unlimited (setting it 0 zero disables the history list). | |
3218 | ||
3219 | o. Setting HISTFILESIZE to a value less than zero causes the history file size | |
3220 | to be unlimited (setting it to 0 causes the history file to be truncated | |
3221 | to zero size). | |
3222 | ||
3223 | p. The `read' builtin now skips NUL bytes in the input. | |
3224 | ||
3225 | q. There is a new `bind -X' option to print all key sequences bound to Unix | |
3226 | commands. | |
3227 | ||
3228 | r. When in Posix mode, `read' is interruptible by a trapped signal. After | |
3229 | running the trap handler, read returns 128+signal and throws away any | |
3230 | partially-read input. | |
3231 | ||
3232 | s. The command completion code skips whitespace and assignment statements | |
3233 | before looking for the command name word to be completed. | |
3234 | ||
3235 | t. The build process has a new mechanism for constructing separate help files | |
3236 | that better reflects the current set of compilation options. | |
3237 | ||
3238 | u. The -nt and -ot options to test now work with files with nanosecond | |
3239 | timestamp resolution. | |
3240 | ||
3241 | v. The shell saves the command history in any shell for which history is | |
3242 | enabled and HISTFILE is set, not just interactive shells. | |
3243 | ||
3244 | w. The shell has `nameref' variables and new -n(/+n) options to declare and | |
3245 | unset to use them, and a `test -R' option to test for them. | |
3246 | ||
3247 | x. The shell now allows assigning, referencing, and unsetting elements of | |
3248 | indexed arrays using negative subscripts (a[-1]=2, echo ${a[-1]}) which | |
3249 | count back from the last element of the array. | |
3250 | ||
3251 | y. The {x}<word redirection feature now allows words like {array[ind]} and | |
3252 | can use variables with special meanings to the shell (e.g., BASH_XTRACEFD). | |
3253 | ||
3254 | z. There is a new CHILD_MAX special shell variable; its value controls the | |
a0c0a00f | 3255 | number of exited child statuses the shell remembers. |
ac50fbac CR |
3256 | |
3257 | aa. There is a new configuration option (--enable-direxpand-default) that | |
3258 | causes the `direxpand' shell option to be enabled by default. | |
3259 | ||
3260 | bb. Bash does not do anything special to ensure that the file descriptor | |
3261 | assigned to X in {x}<foo remains open after the block containing it | |
3262 | completes. | |
3263 | ||
3264 | cc. The `wait' builtin has a new `-n' option to wait for the next child to | |
3265 | change status. | |
3266 | ||
3267 | dd. The `printf' %(...)T format specifier now uses the current time if no | |
3268 | argument is supplied. | |
3269 | ||
3270 | ee. There is a new variable, BASH_COMPAT, that controls the current shell | |
3271 | compatibility level. | |
3272 | ||
3273 | ff. The `popd' builtin now treats additional arguments as errors. | |
3274 | ||
3275 | gg. The brace expansion code now treats a failed sequence expansion as a | |
3276 | simple string and will continue to expand brace terms in the remainder | |
3277 | of the word. | |
3278 | ||
3279 | 4. New Features in Readline | |
3280 | ||
3281 | a. Readline is now more responsive to SIGHUP and other fatal signals when | |
3282 | reading input from the terminal or performing word completion but no | |
3283 | longer attempts to run any not-allowable functions from a signal handler | |
3284 | context. | |
3285 | ||
3286 | b. There are new bindable commands to search the history for the string of | |
3287 | characters between the beginning of the line and the point | |
3288 | (history-substring-search-forward, history-substring-search-backward) | |
3289 | ||
3290 | c. Readline allows quoted strings as the values of variables when setting | |
3291 | them with `set'. As a side effect, trailing spaces and tabs are ignored | |
3292 | when setting a string variable's value. | |
3293 | ||
3294 | d. The history library creates a backup of the history file when writing it | |
3295 | and restores the backup on a write error. | |
3296 | ||
3297 | e. New application-settable variable: rl_filename_stat_hook: a function called | |
3298 | with a filename before using it in a call to stat(2). Bash uses it to | |
3299 | expand shell variables so things like $HOME/Downloads have a slash | |
3300 | appended. | |
3301 | ||
3302 | f. New bindable function `print-last-kbd-macro', prints the most-recently- | |
3303 | defined keyboard macro in a reusable format. | |
3304 | ||
3305 | g. New user-settable variable `colored-stats', enables use of colored text | |
3306 | to denote file types when displaying possible completions (colored analog | |
3307 | of visible-stats). | |
3308 | ||
3309 | h. New user-settable variable `keyseq-timout', acts as an inter-character | |
3310 | timeout when reading input or incremental search strings. | |
3311 | ||
3312 | i. New application-callable function: rl_clear_history. Clears the history list | |
3313 | and frees all readline-associated private data. | |
3314 | ||
3315 | j. New user-settable variable, show-mode-in-prompt, adds a characters to the | |
3316 | beginning of the prompt indicating the current editing mode. | |
3317 | ||
3318 | k. New application-settable variable: rl_input_available_hook; function to be | |
3319 | called when readline needs to check whether there is data available on its | |
3320 | input source. The default hook checks rl_instream. | |
3321 | ||
3322 | l. Readline calls an application-set event hook (rl_signal_event_hook) after | |
3323 | it gets a signal while reading input (read returns -1/EINTR but readline | |
3324 | does not handle the signal immediately) to allow the application to handle | |
3325 | or otherwise note it. Not currently called for SIGHUP or SIGTERM. | |
3326 | ||
3327 | m. If the user-settable variable `history-size' is set to a value less than | |
3328 | 0, the history list size is unlimited. | |
3329 | ||
3330 | ------------------------------------------------------------------------------ | |
495aee44 CR |
3331 | This document details the changes between this version, bash-4.2-release, |
3332 | and the previous version, bash-4.2-rc2. | |
3333 | ||
3334 | 1. Changes to Bash | |
3335 | ||
3336 | a. Fixed a bug that caused some variables to be clobbered by a longjmp, | |
3337 | resulting in stack corruption. | |
3338 | ||
3339 | ------------------------------------------------------------------------------ | |
3340 | This document details the changes between this version, bash-4.2-rc2, | |
3341 | and the previous version, bash-4.2-rc1. | |
3342 | ||
3343 | 1. Changes to Bash | |
3344 | ||
3345 | a. Changes to bash_directory_completion_hook so that it's assigned to the | |
3346 | readline rl_directory_rewrite_hook variable, which modifies the directory | |
3347 | name passed to opendir without modifying the directory name the user | |
3348 | typed. | |
3349 | ||
3350 | b. Fixed bug in select builtin that caused it to not terminate correctly if | |
3351 | the read timed out due to $TMOUT. | |
3352 | ||
3353 | c. Fixed a problem that resulted in non-repeatable sequences of random | |
3354 | numbers when RANDOM=0. | |
3355 | ||
3356 | ------------------------------------------------------------------------------ | |
3357 | This document details the changes between this version, bash-4.2-rc1, | |
3358 | and the previous version, bash-4.2-beta. | |
3359 | ||
3360 | 1. Changes to Bash | |
3361 | ||
3362 | a. Fixed a bug that caused some redirection errors to leak file descriptors. | |
3363 | ||
3364 | b. Fixed a bug that caused unary `+' and `-' arithmetic operators to have a | |
3365 | higher precedence than unary `!' and `~'. | |
3366 | ||
3367 | c. Fixed a bug that caused simple commands in a pipeline to affect the exit | |
3368 | status ($?) seen by subsequent pipeline commands. | |
3369 | ||
3370 | d. A number of cygwin-specific changes to avoid the use of text-mode files | |
3371 | and file access, and to make sure that \r is handled correctly. | |
3372 | ||
3373 | e. Fixed a bug that caused the read builtin to not return failure if an | |
3374 | attempt is made to assign to a readonly variable. | |
3375 | ||
3376 | f. Fixed a bug that caused some builtin usage messages to not be translated. | |
3377 | ||
3378 | g. Fixed a bug that caused the getopts builtin to not return failure if an | |
3379 | attempt is made to assign to a readonly variable. Now it returns 2. | |
3380 | ||
3381 | h. Fixed the cd and pwd builtins to return failure if PWD is readonly and | |
3382 | cannot be assigned to. | |
3383 | ||
3384 | i. Added code to check the return value of access(2) on Solaris systems, | |
3385 | since it returns success for executable tests (e.g., `test -x') when | |
3386 | run by root, even if the file permissions don't allow execution. | |
3387 | ||
3388 | 2. Changes to Readline | |
3389 | ||
3390 | a. Fixed a bug that caused directory names in words to be completed to not | |
3391 | be dequoted correctly. | |
3392 | ||
3393 | 3. New Features in Bash | |
3394 | ||
3395 | 4. New Features in Readline | |
3396 | ||
3397 | ------------------------------------------------------------------------------ | |
3398 | This document details the changes between this version, bash-4.2-beta, | |
3399 | and the previous version, bash-4.2-alpha. | |
3400 | ||
3401 | 1. Changes to Bash | |
3402 | ||
3403 | a. Fixed a bug that caused the \W prompt string escape to not add a closing | |
3404 | NULL. | |
3405 | ||
3406 | b. Fixed a bug that caused partially-quoted words that were not subject to | |
3407 | word splitting to retained quoted NULLs. | |
3408 | ||
3409 | c. Added considerable efficiency speedups when pattern matching in multibyte | |
3410 | locales by skipping multibyte character functions where possible. | |
3411 | ||
3412 | d. Added considerable speedups to variable expansion when in multibyte locales. | |
3413 | ||
3414 | e. Fixed a bug that caused the expansion of $* when there are no positional | |
3415 | parameters to cause the shell to dump core when used in a pattern | |
3416 | matching context. | |
3417 | ||
3418 | f. Fixed a bug that caused variable expansions preceding regular builtins to | |
3419 | not change the shell environment during their execution. | |
3420 | ||
3421 | 2. Changes to Readline | |
3422 | ||
3423 | a. Fixed a bug that made an explicit argument of 0 to yank-last-arg behave | |
3424 | as if it were a negative argument. | |
3425 | ||
3426 | ------------------------------------------------------------------------------ | |
3427 | This document details the changes between this version, bash-4.2-alpha, | |
3428 | and the previous version, bash-4.1-release. | |
3429 | ||
3430 | 1. Changes to Bash | |
3431 | ||
3432 | a. Fixed a bug in the parser when processing alias expansions containing | |
3433 | quoted newlines. | |
3434 | ||
3435 | b. Fixed a memory leak in associative array expansion. | |
3436 | ||
3437 | c. Fixed a bug that caused quoted here-strings to be requoted when printed. | |
3438 | ||
3439 | d. Fixed a bug in arithmetic expansion that caused the index in an array | |
3440 | expansion to be evaluated twice under certain circumstances. | |
3441 | ||
3442 | e. Fixed several bugs with the expansion and display of variables that have | |
3443 | been given attributes but not values and are technically unset. | |
3444 | ||
3445 | f. Fixed a bug that caused core dumps when using filename completion that | |
3446 | expands to a filename containing a globbing character. | |
3447 | ||
3448 | g. Fixed a bug that caused assignment statements preceding a special builtin | |
3449 | when running in Posix mode to not persist after the builtin completed | |
3450 | when the special builtin was executed in a shell function without any | |
3451 | local variables. | |
3452 | ||
3453 | h. Fixed a bug that caused a command to remain in the hash table even after | |
3454 | `hash command' did not find anything if there was already an existing | |
3455 | hashed pathname. | |
3456 | ||
3457 | i. Fixed several bugs caused by executing unsafe functions from a signal | |
3458 | handler in the cases where a signal handler is executed immediately | |
3459 | rather than setting a flag for later execution. | |
3460 | ||
3461 | j. Fixed a bug that caused some internal flag variables to be set | |
3462 | incorrectly if `read -t' timed out. | |
3463 | ||
3464 | k. Fixed a Posix compatibility issue by making sure that a backslash escaping | |
3465 | a `}' within a double-quoted ${...} parameter expansion is removed as part | |
3466 | of the parameter expansion. | |
3467 | ||
3468 | l. Fixed a bug that caused execution of a trap to overwrite PIPESTATUS. | |
3469 | ||
3470 | m. Fixed a bug that caused here documents to not be displayed correctly | |
3471 | when attached to commands inside compound commands. | |
3472 | ||
3473 | n. Fixed a bug that caused the printf builtin to use the wrong precision | |
3474 | when using the `*' modifier. | |
3475 | ||
3476 | o. Fixed a bug that caused an arriving SIGCHLD to interrupt output functions | |
3477 | like those invoked by echo or printf. | |
3478 | ||
3479 | p. Changed to use a more robust mechanism than eaccess(2) when test is | |
3480 | checking filenames for execution permission. | |
3481 | ||
3482 | q. Fixed a bug that caused spurious semicolons to be added into the command | |
3483 | history in certain cases. | |
3484 | ||
3485 | r. Fixed a bug that caused the shell to free non-allocated memory when | |
3486 | unsetting element 0 of an associative array after it was assigned | |
3487 | implicitly. | |
3488 | ||
3489 | s. Fixed a bug that could cause the shell to dump core if using the `v' | |
3490 | vi editing command on a multi-line command. | |
3491 | ||
3492 | t. Fixed a bug that left FIFOs opened by process substitutions open long | |
3493 | enough to potentially cause file descriptor exhaustion when running a | |
3494 | shell function or shell builtin. | |
3495 | ||
3496 | u. Fixed a bug that caused the history expansion functions to not recognize | |
3497 | process substitution or extended glob patterns as single words. | |
3498 | ||
3499 | v. Fixed a bug that caused restricted shells to set a restricted command's | |
3500 | exit status incorrectly. | |
3501 | ||
3502 | w. Fixed a bug that caused bash to ignore the wrong set of filenames when | |
3503 | completing a command using the `complete-filename' readline command. | |
3504 | ||
3505 | x. Fixed a bug that caused a -PID argument following a -s sig or -n sig to | |
3506 | not be interpreted as a signal specification. | |
3507 | ||
3508 | y. Changed posix-mode behavior of a parse error in a `.' script or `eval' | |
3509 | command to exit the shell under Posix-specified conditions. Previous | |
3510 | versions printed a warning. | |
3511 | ||
3512 | z. Fixed a bug in \W prompt expansion that resulted in incorrect expansion | |
3513 | in the event of overlapping strings. | |
3514 | ||
3515 | aa. Fixed a bug that caused the := parameter expansion operator to return the | |
3516 | wrong value as the result of the expansion. | |
3517 | ||
3518 | bb. When in Posix mode, a single quote is not treated specially in a | |
3519 | double-quoted ${...} expansion, unless the expansion operator is | |
3520 | # or % or the non-Posix `//', `^', and `,'. In particular, it does | |
3521 | not define a new quoting context. This is from Posix interpretation 221. | |
3522 | ||
3523 | cc. Fixed a bug that inadvertently allowed program names containing slashes | |
3524 | to be entered into the command hash table. | |
3525 | ||
3526 | dd. Fixed a bug that caused the select builtin to incorrectly compute the | |
3527 | display width of the arguments in the presence of multibyte characters. | |
3528 | ||
3529 | ee. Fixed a bug that caused bash to not change the xtrace file descriptor if | |
3530 | BASH_XTRACEFD was found in the shell environment at startup. | |
3531 | ||
3532 | ff. Fixed a memory leak in the pattern removal parameter expansion. | |
3533 | ||
3534 | gg. Fixed a bug that caused SIGINT to fail to interrupt a nested loop if the | |
3535 | loop was in a pipeline. | |
3536 | ||
3537 | hh. Fixed a problem in $(...) parsing that caused the parser to add an extra | |
3538 | space to a here-document delimiter if the first word contained a `/'. | |
3539 | ||
3540 | ii. Fixed a bug that caused functions defined with the `function' reserved | |
3541 | word to require braces around the function body. | |
3542 | ||
3543 | jj. Fixed a bug that caused bash to dump core when a variable expansion being | |
3544 | used as an array subscript failed. | |
3545 | ||
3546 | kk. Fixed a bug that caused bash to dump core if the case-modification | |
3547 | expansions were used on a variable with a null value. | |
3548 | ||
3549 | ll. Fixed a bug that caused partially-quoted strings to be split incorrectly | |
3550 | if a variable with a null value was expanded within double quotes. | |
3551 | ||
3552 | mm. The pattern substitution word expansion has been sped up dramatically | |
3553 | when running in a locale with multibyte characters. | |
3554 | ||
3555 | nn. Fixed a bug that caused history -a to not write the correct lines to | |
3556 | the history file if all the new lines in the history list were added | |
3557 | since the last time the history file was read or written. | |
3558 | ||
3559 | oo. Fixed a bug that caused completion of a word with an unclosed `` command | |
3560 | substitution to set the prompt incorrectly. | |
3561 | ||
3562 | pp. Fixed a bug that caused extended globbing patterns in $HISTIGNORE or | |
3563 | $GLOBIGNORE to be incorrectly scanned. | |
3564 | ||
3565 | qq. Fixed a bug caused by closing file descriptors 3-20 on shell startup. The | |
3566 | shell now sets them to close-on-exec. | |
3567 | ||
3568 | rr. Fixed a bug that caused the exit status of `exec file' to be set incorrectly | |
3569 | if `file' was a directory. | |
3570 | ||
3571 | ss. Fixed a bug in the `.' builtin to make a non-interactive posix-mode shell | |
3572 | exit if the file argument to `.' is not found. Prefixing exec with | |
3573 | `command' makes the shell not exit. Posix requires this behavior. | |
3574 | ||
3575 | tt. Fixed a bug that caused `sh -c 'command exec; exit 1' to hang. | |
3576 | ||
3577 | uu. Fixed a bug in $(...) command substitution parsing that caused the shell | |
3578 | to treat backslash-newline incorrectly when parsing a comment. | |
3579 | ||
3580 | vv. Fixed bug that caused brace expansion sequence generation to misbehave | |
3581 | when supplied integers greater than 2**31 - 1. | |
3582 | ||
3583 | ww. Fixed a bug that caused failure to save file descriptors for redirections | |
3584 | to corrupt shell file descriptors. | |
3585 | ||
3586 | xx. Fixed a bug that caused bash-forward-shellword to not correctly handle | |
3587 | quoted strings. | |
3588 | ||
3589 | 2. Changes to Readline | |
3590 | ||
3591 | a. Fixed a bug that caused the unconverted filename to be added to the list of | |
3592 | completions when the application specified filename conversion functions. | |
3593 | ||
3594 | b. Fixed a bug that caused the wrong filename to be passed to opendir when the | |
3595 | application has specified a filename dequoting function. | |
3596 | ||
3597 | c. Fixed a bug when repeating a character search in vi mode in the case where | |
3598 | there was no search to repeat. | |
3599 | ||
3600 | d. When show-all-if-ambiguous is set, the completion routines no longer insert | |
3601 | a common match prefix that is shorter than the text being completed. | |
3602 | ||
3603 | e. The full set of vi editing commands may now be used in callback mode. | |
3604 | ||
3605 | f. Fixed a bug that caused readline to not update its idea of the terminal | |
3606 | dimensions while running in `no-echo' mode. | |
3607 | ||
3608 | h. Fixed a bug that caused readline to dump core if an application called | |
3609 | rl_prep_terminal without setting rl_instream. | |
3610 | ||
3611 | i. Fixed a bug that caused meta-prefixed characters bound to incremental | |
3612 | search forward or backward to not be recognized if they were typed | |
3613 | subsequently. | |
3614 | ||
3615 | j. The incremental search code treats key sequences that map to the same | |
3616 | functions as (default) ^G, ^W, and ^Y as equivalent to those characters. | |
3617 | ||
3618 | k. Fixed a bug in menu-complete that caused it to misbehave with large | |
3619 | negative argument. | |
3620 | ||
3621 | l. Fixed a bug that caused vi-mode yank-last-arg to ring the bell when invoked | |
3622 | at the end of the line. | |
3623 | ||
3624 | 3. New Features in Bash | |
3625 | ||
3626 | a. `exec -a foo' now sets $0 to `foo' in an executable shell script without a | |
3627 | leading #!. | |
3628 | ||
3629 | b. Subshells begun to execute command substitutions or run shell functions or | |
3630 | builtins in subshells do not reset trap strings until a new trap is | |
3631 | specified. This allows $(trap) to display the caller's traps and the | |
3632 | trap strings to persist until a new trap is set. | |
3633 | ||
3634 | c. `trap -p' will now show signals ignored at shell startup, though their | |
3635 | disposition still cannot be modified. | |
3636 | ||
3637 | d. $'...', echo, and printf understand \uXXXX and \UXXXXXXXX escape sequences. | |
3638 | ||
3639 | e. declare/typeset has a new `-g' option, which creates variables in the | |
3640 | global scope even when run in a shell function. | |
3641 | ||
3642 | f. test/[/[[ have a new -v variable unary operator, which returns success if | |
3643 | `variable' has been set. | |
3644 | ||
3645 | g. Posix parsing changes to allow `! time command' and multiple consecutive | |
3646 | instances of `!' (which toggle) and `time' (which have no cumulative | |
3647 | effect). | |
3648 | ||
3649 | h. Posix change to allow `time' as a command by itself to print the elapsed | |
3650 | user, system, and real times for the shell and its children. | |
3651 | ||
3652 | j. $((...)) is always parsed as an arithmetic expansion first, instead of as | |
3653 | a potential nested command substitution, as Posix requires. | |
3654 | ||
3655 | k. A new FUNCNEST variable to allow the user to control the maximum shell | |
3656 | function nesting (recursive execution) level. | |
3657 | ||
3658 | l. The mapfile builtin now supplies a third argument to the callback command: | |
3659 | the line about to be assigned to the supplied array index. | |
3660 | ||
3661 | m. The printf builtin has a new %(fmt)T specifier, which allows time values | |
3662 | to use strftime-like formatting. | |
3663 | ||
3664 | n. There is a new `compat41' shell option. | |
3665 | ||
3666 | o. The cd builtin has a new Posix-mandated `-e' option. | |
3667 | ||
3668 | p. Negative subscripts to indexed arrays, previously errors, now are treated | |
3669 | as offsets from the maximum assigned index + 1. | |
3670 | ||
3671 | q. Negative length specifications in the ${var:offset:length} expansion, | |
3672 | previously errors, are now treated as offsets from the end of the variable. | |
3673 | ||
3674 | r. Parsing change to allow `time -p --'. | |
3675 | ||
3676 | s. Posix-mode parsing change to not recognize `time' as a keyword if the | |
3677 | following token begins with a `-'. This means no more Posix-mode | |
3678 | `time -p'. Posix interpretation 267. | |
3679 | ||
3680 | t. There is a new `lastpipe' shell option that runs the last command of a | |
3681 | pipeline in the current shell context. The lastpipe option has no | |
3682 | effect if job control is enabled. | |
3683 | ||
3684 | u. History expansion no longer expands the `$!' variable expansion. | |
3685 | ||
3686 | v. Posix mode shells no longer exit if a variable assignment error occurs | |
3687 | with an assignment preceding a command that is not a special builtin. | |
3688 | ||
3689 | w. Non-interactive mode shells exit if -u is enabled and an attempt is made | |
3690 | to use an unset variable with the % or # expansions, the `//', `^', or | |
3691 | `,' expansions, or the parameter length expansion. | |
3692 | ||
3693 | x. Posix-mode shells use the argument passed to `.' as-is if a $PATH search | |
3694 | fails, effectively searching the current directory. Posix-2008 change. | |
3695 | ||
3696 | 4. New Features in Readline | |
3697 | ||
3698 | a. The history library does not try to write the history filename in the | |
3699 | current directory if $HOME is unset. This closes a potential security | |
3700 | problem if the application does not specify a history filename. | |
3701 | ||
3702 | b. New bindable variable `completion-display-width' to set the number of | |
3703 | columns used when displaying completions. | |
3704 | ||
3705 | c. New bindable variable `completion-case-map' to cause case-insensitive | |
3706 | completion to treat `-' and `_' as identical. | |
3707 | ||
3708 | d. There are new bindable vi-mode command names to avoid readline's case- | |
3709 | insensitive matching not allowing them to be bound separately. | |
3710 | ||
3711 | e. New bindable variable `menu-complete-display-prefix' causes the menu | |
3712 | completion code to display the common prefix of the possible completions | |
3713 | before cycling through the list, instead of after. | |
3714 | ||
3715 | ------------------------------------------------------------------------------ | |
0001803f CR |
3716 | This document details the changes between this version, bash-4.1-rc, |
3717 | and the previous version, bash-4.1-beta. | |
3718 | ||
3719 | 1. Changes to Bash | |
3720 | ||
3721 | a. Fixed a bug that caused printf to not return a partial value when it | |
3722 | encountered an error while converting an integer argument. | |
3723 | ||
3724 | b. Fixed a bug that caused setting one of the compatNN options to not | |
3725 | turn off the others. | |
3726 | ||
3727 | c. The (undocumented) --wordexp option is no longer included by default. | |
3728 | ||
3729 | d. Fixed a bug in conditional command execution that caused it to not | |
3730 | correctly ignore the exit status under certain circumstances. | |
3731 | ||
3732 | e. Added a configure-time check for correctly-working asprintf/snprintf. | |
3733 | ||
3734 | f. Fixed some problems with line number calculation and display when sourcing | |
3735 | a file in an interactive shell. | |
3736 | ||
3737 | g. Fixed a bug that caused the shell to crash when using `declare -A foo=bar'. | |
3738 | ||
3739 | h. Fixed a bug that caused an off-by-one error when calculating the directories | |
3740 | to display with the PROMPT_DIRTRIM option. | |
3741 | ||
3742 | 2. Changes to Readline | |
3743 | ||
3744 | a. Fixed a bug that caused applications using the callback interface to not | |
3745 | react to SIGINT (or other signals) until another character arrived. | |
3746 | ||
3747 | ------------------------------------------------------------------------------ | |
3748 | This document details the changes between this version, bash-4.1-beta, | |
3749 | and the previous version, bash-4.1-alpha. | |
3750 | ||
3751 | 1. Changes to Bash | |
3752 | ||
3753 | a. Fixed a bug in mapfile that caused the shell to crash if it was passed the | |
3754 | name of an associative array. | |
3755 | ||
3756 | b. Fixed a bug that caused the shell to incorrectly split case patterns if | |
3757 | they contained characters in $IFS. | |
3758 | ||
3759 | c. Fixed a bug that caused the shell to set $? to the wrong value when using | |
3760 | a construct ending with a variable assignment with set -x enabled and PS4 | |
3761 | containing a command substitution. | |
3762 | ||
3763 | d. Fixed a bug that caused the shell to read commands incorrectly if an | |
3764 | expansion error occurred under certain conditions in a user-specified | |
3765 | subshell. | |
3766 | ||
3767 | e. Fixed a bug that caused the shell to set $? incorrectly if a parse error | |
3768 | occurred in an evaluation context ("eval", trap command, dot script, etc.) | |
3769 | ||
3770 | f. Fixed a bug that caused the shell to attempt command substitution | |
3771 | completion within a single-quoted string. | |
3772 | ||
3773 | g. Fixed a bug that caused the shell to insert an extra single quote during | |
3774 | word completion. | |
3775 | ||
3776 | h. Fixed a bug that caused the shell to crash if invoked with the environment | |
3777 | variable EMACS having a null value. | |
3778 | ||
3779 | i. Fixed a bug that caused bash to incorrectly report the presence of new | |
3780 | mail in a `maildir' environment. | |
3781 | ||
3782 | j. Fixed a bug that caused the shell to not recognize a here-document ending | |
3783 | delimiter inside a command substitution. | |
3784 | ||
3785 | k. Fixed a bug that caused the shell to crash when a a dynamic array variable | |
3786 | was assigned a scalar value. | |
3787 | ||
3788 | 2. Changes to Readline | |
3789 | ||
3790 | 3. New Features in Bash | |
3791 | ||
3792 | a. The mapfile/readarray builtin no longer stores the commands it invokes via | |
3793 | callbacks in the history list. | |
3794 | ||
3795 | b. There is a new `compat40' shopt option. | |
3796 | ||
3797 | c. The < and > operators to [[ do string comparisons using the current locale | |
3798 | only if the compatibility level is greater than 40 (set to 41 by default). | |
3799 | ||
3800 | 4. New Features in Readline | |
3801 | ||
3802 | ------------------------------------------------------------------------------ | |
3803 | This document details the changes between this version, bash-4.1-alpha, | |
3804 | and the previous version, bash-4.0-release. | |
3805 | ||
3806 | 1. Changes to Bash | |
3807 | ||
3808 | a. Fixed bugs in the parser involving new parsing of the commands contained | |
3809 | in command substitution when the substitution is read. | |
3810 | ||
3811 | b. Fixed a bug that caused the shell to dump core when performing programmable | |
3812 | completion using a shell function. | |
3813 | ||
3814 | c. Fixed a bug in `mapfile' that caused it to invoke callbacks at the wrong | |
3815 | time. | |
3816 | ||
3817 | d. Fixed a bug that caused the shell to dump core when listing jobs in the | |
3818 | `exit' builtin. | |
3819 | ||
3820 | e. Fixed several bugs encountered when reading subscripts in associative | |
3821 | array assignments and expansions. | |
3822 | ||
3823 | f. Fixed a bug that under some circumstances caused an associative array to | |
3824 | be converted to an indexed array. | |
3825 | ||
3826 | g. Fixed a bug that caused syntax errors and SIGINT interrupts to not set | |
3827 | $? to a value > 128. | |
3828 | ||
3829 | h. Fixed a bug that caused the shell to remove FIFOs associated with process | |
3830 | substitution inside shell functions. | |
3831 | ||
3832 | i. Fixed a bug that caused terminal attributes to not be reset when the | |
3833 | `read' builtin timed out. | |
3834 | ||
3835 | j. Fixed a bug in brace expansion that caused unwanted zero padding of the | |
3836 | expanded terms. | |
3837 | ||
3838 | k. Fixed a bug that prevented the |& construct from working as intended when | |
3839 | used with a simple command with additional redirections. | |
3840 | ||
8868edaf | 3841 | l. Fixed a bug with the case statement ;& terminator that caused the shell to |
0001803f CR |
3842 | dereference a NULL pointer. |
3843 | ||
3844 | m. Fixed a bug that caused assignment statements or redirections preceding | |
3845 | a simple command name to inhibit alias expansion. | |
3846 | ||
3847 | n. Fixed the behavior of `set -u' to conform to the latest Posix interpretation: | |
3848 | every expansion of an unset variable except $@ and $* will cause the | |
3849 | shell to exit. | |
3850 | ||
3851 | o. Fixed a bug that caused double-quoted expansions of $* inside word | |
3852 | expansions like ${x#$*} to not expand properly when $IFS is empty. | |
3853 | ||
3854 | p. Fixed a bug that caused traps to set $LINENO to the wrong value when they | |
3855 | execute. | |
3856 | ||
3857 | q. Fixed a bug that caused off-by-one errors when computing history lines in | |
3858 | the `fc' builtin. | |
3859 | ||
3860 | r. Fixed a bug that caused some terminating signals to not exit the shell | |
3861 | quickly enough, forcing the kernel to send the signal (e.g., SIGSEGV) | |
3862 | multiple times. | |
3863 | ||
3864 | s. Fixed a bug that caused the shell to attempt to add empty lines to the | |
3865 | history list when reading here documents. | |
3866 | ||
3867 | t. Made some internal changes that dramatically speeds up sequential indexed | |
3868 | array access. | |
3869 | ||
3870 | u. Fixed a bug that caused the shell to write past the end of a string when | |
3871 | completing a double-quoted string ending in a backslash. | |
3872 | ||
3873 | v. Fixed a bug that caused the shell to replace too many characters when a | |
3874 | pattern match was null in a ${foo//bar} expansion. | |
3875 | ||
3876 | w. Fixed bugs in the expansion of ** that caused duplicate directory names | |
3877 | and the contents of the current directory to be omitted. | |
3878 | ||
3879 | x. Fixed a bug that caused $? to not be set correctly when referencing an | |
3880 | unset variable with set -u and set -e enabled. | |
3881 | ||
3882 | y. Fixed a bug caused by executing an external program from the DEBUG trap | |
3883 | while a pipeline was running. The effect was to disturb the pipeline | |
3884 | state, occasionally causing it to hang. | |
3885 | ||
3886 | z. Fixed a bug that caused the ** glob expansion to dump core if it | |
3887 | encountered an unsearchable directory. | |
3888 | ||
3889 | aa. Fixed a bug that caused `command -v' and `command -V' to not honor the | |
3890 | path set by the -p option. | |
3891 | ||
3892 | bb. Fixed a bug that caused brace expansion to take place too soon in some | |
3893 | compound array assignments. | |
3894 | ||
3895 | cc. Fixed a bug that caused programmable completion functions' changes to | |
3896 | READLINE_POINT to not be reflected back to readline. | |
3897 | ||
3898 | dd. Fixed a bug that caused the shell to dump core if a trap was executed | |
3899 | during a shell assignment statement. | |
3900 | ||
3901 | ee. Fixed an off-by-one error when computing the number of positional | |
3902 | parameters for the ${@:0:n} expansion. | |
3903 | ||
3904 | ff. Fixed a problem with setting COMP_CWORD for programmable completion | |
3905 | functions that could leave it set to -1. | |
3906 | ||
3907 | gg. Fixed a bug that caused the ERR trap to be triggered in some cases where | |
3908 | `set -e' would not have caused the shell to exit. | |
3909 | ||
3910 | hh. Fixed a bug that caused changes made by `compopt' to not persist past the | |
3911 | completion function in which compopt was executed. | |
3912 | ||
3913 | ii. Fixed a bug that caused the list of hostname completions to not be cleared | |
3914 | when HOSTNAME was unset. | |
3915 | ||
3916 | jj. Fixed a bug that caused variable expansion in here documents to look in | |
3917 | any temporary environment. | |
3918 | ||
3919 | kk. Bash and readline can now convert file names between precomposed and | |
3920 | decomposed Unicode on Mac OS X ("keyboard" and file system forms, | |
3921 | respectively). This affects filename completion (using new | |
3922 | rl_filename_rewrite_hook), globbing, and readline redisplay. | |
3923 | ||
3924 | ll. The ERR and EXIT traps now see a non-zero value for $? when a parser | |
3925 | error after set -e has been enabled causes the shell to exit. | |
3926 | ||
3927 | mm. Fixed a bug that in brace expansion that caused zero-prefixed terms to | |
3928 | not contain the correct number of digits. | |
3929 | ||
3930 | nn. Fixed a bug that caused the shell to free non-allocated memory when | |
3931 | unsetting an associative array which had had a value implicitly assigned | |
3932 | to index "0". | |
3933 | ||
3934 | oo. Fixed a memory leak in the ${!prefix@} expansion. | |
3935 | ||
3936 | pp. Fixed a bug that caused printf to not correctly report all write errors. | |
3937 | ||
3938 | qq. Fixed a bug that caused single and double quotes to act as delimiters | |
3939 | when splitting a command line into words for programmable completion. | |
3940 | ||
3941 | rr. Fixed a bug that caused ** globbing that caused **/path/* to match every | |
3942 | directory, not just those matching `path'. | |
3943 | ||
3944 | ss. Fixed a bug that caused the shell to dump core when running `help' without | |
3945 | arguments if the terminal width was fewer than 7 characters. | |
3946 | ||
3947 | 2. Changes to Readline | |
3948 | ||
3949 | a. The SIGWINCH signal handler now avoids calling the redisplay code if | |
3950 | one arrives while in the middle of redisplay. | |
3951 | ||
3952 | b. Changes to the timeout code to make sure that timeout values greater | |
3953 | than one second are handled better. | |
3954 | ||
3955 | c. Fixed a bug in the redisplay code that was triggered by a prompt | |
3956 | containing invisible characters exactly the width of the screen. | |
3957 | ||
3958 | d. Fixed a bug in the redisplay code encountered when running in horizontal | |
3959 | scroll mode. | |
3960 | ||
3961 | e. Fixed a bug that prevented menu completion from properly completing | |
3962 | filenames. | |
3963 | ||
3964 | f. Fixed a redisplay bug caused by a multibyte character causing a line to | |
3965 | wrap. | |
3966 | ||
3967 | g. Fixed a bug that caused key sequences of two characters to not be | |
3968 | recognized when a longer sequence identical in the first two characters | |
3969 | was bound. | |
3970 | ||
3971 | h. Fixed a bug that caused history expansion to be attempted on $'...' | |
3972 | single-quoted strings. | |
3973 | ||
3974 | i. Fixed a bug that caused incorrect redisplay when the prompt contained | |
3975 | multibyte characters in an `invisible' sequence bracketed by \[ and | |
3976 | \]. | |
3977 | ||
3978 | j. Fixed a bug that caused history expansion to short-circuit after | |
3979 | encountering a multibyte character. | |
3980 | ||
3981 | 3. New Features in Bash | |
3982 | ||
3983 | a. Here-documents within $(...) command substitutions may once more be | |
3984 | delimited by the closing right paren, instead of requiring a newline. | |
3985 | ||
3986 | b. Bash's file status checks (executable, readable, etc.) now take file | |
3987 | system ACLs into account on file systems that support them. | |
3988 | ||
3989 | c. Bash now passes environment variables with names that are not valid | |
3990 | shell variable names through into the environment passed to child | |
3991 | processes. | |
3992 | ||
3993 | d. The `execute-unix-command' readline function now attempts to clear and | |
3994 | reuse the current line rather than move to a new one after the command | |
3995 | executes. | |
3996 | ||
3997 | e. `printf -v' can now assign values to array indices. | |
3998 | ||
3999 | f. New `complete -E' and `compopt -E' options that work on the "empty" | |
4000 | completion: completion attempted on an empty command line. | |
4001 | ||
4002 | g. New complete/compgen/compopt -D option to define a `default' completion: | |
4003 | a completion to be invoked on command for which no completion has been | |
4004 | defined. If this function returns 124, programmable completion is | |
4005 | attempted again, allowing a user to dynamically build a set of completions | |
4006 | as completion is attempted by having the default completion function | |
4007 | install individual completion functions each time it is invoked. | |
4008 | ||
4009 | h. When displaying associative arrays, subscripts are now quoted. | |
4010 | ||
4011 | i. Changes to dabbrev-expand to make it more `emacs-like': no space appended | |
4012 | after matches, completions are not sorted, and most recent history entries | |
4013 | are presented first. | |
4014 | ||
4015 | j. The [[ and (( commands are now subject to the setting of `set -e' and the | |
4016 | ERR trap. | |
4017 | ||
4018 | k. The source/. builtin now removes NUL bytes from the file before attempting | |
4019 | to parse commands. | |
4020 | ||
4021 | l. There is a new configuration option (in config-top.h) that forces bash to | |
4022 | forward all history entries to syslog. | |
4023 | ||
4024 | m. A new variable $BASHOPTS to export shell options settable using `shopt' to | |
4025 | child processes. | |
4026 | ||
4027 | n. There is a new confgure option that forces the extglob option to be | |
4028 | enabled by default. | |
4029 | ||
4030 | o. New variable $BASH_XTRACEFD; when set to an integer bash will write xtrace | |
4031 | output to that file descriptor. | |
4032 | ||
4033 | p. If the optional left-hand-side of a redirection is of the form {var}, the | |
4034 | shell assigns the file descriptor used to $var or uses $var as the file | |
4035 | descriptor to move or close, depending on the redirection operator. | |
4036 | ||
4037 | q. The < and > operators to the [[ conditional command now do string | |
4038 | comparison according to the current locale. | |
4039 | ||
4040 | r. Programmable completion now uses the completion for `b' instead of `a' | |
4041 | when completion is attempted on a line like: a $(b c. | |
4042 | ||
4043 | s. Force extglob on temporarily when parsing the pattern argument to | |
4044 | the == and != operators to the [[ command, for compatibility. | |
4045 | ||
4046 | t. Changed the behavior of interrupting the wait builtin when a SIGCHLD is | |
4047 | received and a trap on SIGCHLD is set to be Posix-mode only. | |
4048 | ||
4049 | u. The read builtin has a new `-N nchars' option, which reads exactly NCHARS | |
4050 | characters, ignoring delimiters like newline. | |
4051 | ||
4052 | 4. New Features in Readline | |
4053 | ||
4054 | a. New bindable function: menu-complete-backward. | |
4055 | ||
4056 | b. In the vi insertion keymap, C-n is now bound to menu-complete by default, | |
4057 | and C-p to menu-complete-backward. | |
4058 | ||
4059 | c. When in vi command mode, repeatedly hitting ESC now does nothing, even | |
4060 | when ESC introduces a bound key sequence. This is closer to how | |
4061 | historical vi behaves. | |
4062 | ||
4063 | d. New bindable function: skip-csi-sequence. Can be used as a default to | |
4064 | consume key sequences generated by keys like Home and End without having | |
4065 | to bind all keys. | |
4066 | ||
4067 | e. New application-settable function: rl_filename_rewrite_hook. Can be used | |
4068 | to rewite or modify filenames read from the file system before they are | |
4069 | compared to the word to be completed. | |
4070 | ||
4071 | f. New bindable variable: skip-completed-text, active when completing in the | |
4072 | middle of a word. If enabled, it means that characters in the completion | |
4073 | that match characters in the remainder of the word are "skipped" rather | |
4074 | than inserted into the line. | |
4075 | ||
4076 | g. The pre-readline-6.0 version of menu completion is available as | |
4077 | "old-menu-complete" for users who do not like the readline-6.0 version. | |
4078 | ||
4079 | h. New bindable variable: echo-control-characters. If enabled, and the | |
4080 | tty ECHOCTL bit is set, controls the echoing of characters corresponding | |
4081 | to keyboard-generated signals. | |
4082 | ||
4083 | i. New bindable variable: enable-meta-key. Controls whether or not readline | |
4084 | sends the smm/rmm sequences if the terminal indicates it has a meta key | |
4085 | that enables eight-bit characters. | |
4086 | ||
4087 | ------------------------------------------------------------------------------ | |
17345e5a JA |
4088 | This document details the changes between this version, bash-4.0-release, |
4089 | and the previous version, bash-4.0-rc1. | |
4090 | ||
4091 | 1. Changes to Bash | |
4092 | ||
4093 | a. Changed the message printed when setlocale(3) fails to only include the | |
4094 | strerror error text if the call changes errno. | |
4095 | ||
4096 | b. Changed trap command execution to reset the line number before running a | |
4097 | trap (except DEBUG and RETURN traps). | |
4098 | ||
4099 | c. Fixed behavior of case-modifiying word expansions to not work on | |
4100 | individual words within a variable's value. | |
4101 | ||
4102 | d. Fixed a bug that caused mapfile to not be interruptible when run in an | |
4103 | interactive shell. | |
4104 | ||
4105 | e. Fixed a bug that caused mapfile to not run callbacks for the first line | |
4106 | read. | |
4107 | ||
4108 | f. Fixed a bug that caused mapfile to not honor EOF typed in an interactive | |
4109 | shell. | |
4110 | ||
4111 | g. Fixed the coprocess reaping code to not run straight from a signal handler. | |
4112 | ||
4113 | h. Fixed a bug that caused printf -b to ignore the first % conversion specifier | |
4114 | in the format string on 64-bit systems. | |
4115 | ||
4116 | i. Fixed a bug that caused incorrect word splitting when `:', `=', or `~' | |
4117 | appeared in $IFS. | |
4118 | ||
4119 | j. Fixed a bug that caused data corruption in the programmable completion code | |
4120 | when a shell function called from a completion aborted execution. | |
4121 | ||
4122 | k. Fixed a bug that caused the CPU usage reported by the `time' builtin to be | |
4123 | capped at 100%. | |
4124 | ||
4125 | l. Changed behavior of shell when -e option is in effect to reflect consensus | |
4126 | of Posix shell standardization working group. | |
4127 | ||
4128 | m. Fixed a bug introduced in bash-4.0-alpha that caused redirections to not | |
4129 | be displayed by `type' or `declare' when appearing in functions under | |
4130 | certain circumstances. | |
4131 | ||
4132 | 2. Changes to Readline | |
4133 | ||
4134 | a. Fixed a bug that caused !(...) extended glob patterns to inhibit later | |
4135 | history expansion. | |
4136 | ||
4137 | b. Reworked the signal handling to avoid calling disallowed functions from a | |
4138 | signal handler. | |
4139 | ||
4140 | 3. New Features in Bash | |
4141 | ||
4142 | a. `readarray' is now a synonym for `mapfile'. | |
4143 | ------------------------------------------------------------------------------ | |
3185942a JA |
4144 | This document details the changes between this version, bash-4.0-rc1, |
4145 | and the previous version, bash-4.0-beta2. | |
4146 | ||
4147 | 1. Changes to Bash | |
4148 | ||
4149 | a. Fixed a bug that caused parsing errors when a $()-style command | |
4150 | substitution was follwed immediately by a quoted newline. | |
4151 | ||
4152 | b. Fixed a bug that caused extended shell globbing patterns beginning with | |
4153 | `*(' to not work when used with pattern substitution word expansions. | |
4154 | ||
4155 | ------------------------------------------------------------------------------ | |
4156 | This document details the changes between this version, bash-4.0-beta2, | |
4157 | and the previous version, bash-4.0-beta. | |
4158 | ||
4159 | 1. Changes to Bash | |
4160 | ||
4161 | a. Fixed a bug that caused failed word expansions to set $? but not | |
4162 | PIPESTATUS. | |
4163 | ||
4164 | b. Changed filename completion to quote the tilde in a filename with a | |
4165 | leading tilde that exists in the current directory. | |
4166 | ||
4167 | c. Fixed a bug that caused a file descriptor leak when performing | |
4168 | redirections attached to a compound command. | |
4169 | ||
4170 | d. Fixed a bug that caused expansions of $@ and $* to not exit the shell if | |
4171 | the -u option was enabled and there were no posititional parameters. | |
4172 | ||
4173 | e. Fixed a bug that resulted in bash not terminating immediately if a | |
4174 | terminating signal was received while performing output. | |
4175 | ||
4176 | f. Fixed a bug that caused the shell to crash after creating 256 process | |
4177 | substitutions during word completion. | |
4178 | ||
4179 | 2. Changes to Readline | |
4180 | ||
4181 | a. Fixed a bug that caused redisplay errors when using prompts with invisible | |
4182 | characters and numeric arguments to a command in a multibyte locale. | |
4183 | ||
4184 | b. Fixed a bug that caused redisplay errors when using prompts with invisible | |
4185 | characters spanning more than two physical screen lines. | |
4186 | ||
4187 | ------------------------------------------------------------------------------ | |
4188 | This document details the changes between this version, bash-4.0-beta, | |
17345e5a | 4189 | and the previous version, bash-4.0-alpha. |
3185942a JA |
4190 | |
4191 | 1. Changes to Bash | |
4192 | ||
4193 | a. Fixed a typo that caused a variable to be used before initialization | |
4194 | while parsing Posix-style command substitutions. | |
4195 | ||
4196 | b. Fixed a bug that caused stray ^? when the expansion of a parameter used | |
4197 | as part of a pattern removal expansion is empty, but part of a non- | |
4198 | empty string. | |
4199 | ||
4200 | c. Fixed a bug that could cause strings not converted to numbers by strtol | |
4201 | to be treated as if the conversion had been successful. | |
4202 | ||
4203 | d. The `return' builtin now accepts no options and requires a `--' before | |
4204 | a negative return value, as Posix requires. | |
4205 | ||
4206 | e. Fixed a bug that caused local variables to be created with the empty | |
4207 | string for a value rather than no value. | |
4208 | ||
4209 | f. Changed behavior so the shell now acts as if it received an interrupt | |
4210 | when a pipeline is killed by SIGINT while executing a list. | |
4211 | ||
4212 | g. Fixed a bug that caused `declare var' and `typeset var' to initialize | |
4213 | `var' to the empty string. | |
4214 | ||
4215 | h. Changed `bind' builtin to print a warning but proceed if invoked when | |
4216 | line editing is not active. | |
4217 | ||
4218 | i. Fixed a bug that caused the shell to exit when the `errexit' option is | |
4219 | set and a command in a pipeline returns a non-zero exit status. | |
4220 | ||
4221 | j. Fixed a bug that caused the shell to not run the exit trap in a command | |
4222 | run with `bash -c' under some circumstances. | |
4223 | ||
4224 | k. Fixed a bug that caused parser errors to occasionally not set $? when | |
4225 | running commands with `eval'. | |
4226 | ||
4227 | l. Fixed a bug that caused stray control characters when evaluating compound | |
4228 | array assignments containing $'\x7f' escapes. | |
4229 | ||
4230 | m. Fixed a bug that caused redirections involving file descriptor 10 as the | |
4231 | target to behave incorrectly. | |
4232 | ||
4233 | n. Fixed a bug that could cause memory to be freed multiple times when | |
4234 | assigning to COMP_WORDBREAKS. | |
4235 | ||
4236 | o. Fixed a bug that could cause NULL pointer dereferences when COMP_WORDBREAKS | |
4237 | was unset. | |
4238 | ||
4239 | 2. Changes to Readline | |
4240 | ||
4241 | 3. New Features in Bash | |
4242 | ||
4243 | a. A value of 0 for the -t option to `read' now returns success if there is | |
4244 | input available to be read from the specified file descriptor. | |
4245 | ||
4246 | b. CDPATH and GLOBIGNORE are ignored when the shell is running in privileged | |
4247 | mode. | |
4248 | ||
4249 | c. New bindable readline functions shell-forward-word and shell-backward-word, | |
4250 | which move forward and backward words delimited by shell metacharacters | |
4251 | and honor shell quoting. | |
4252 | ||
4253 | d. New bindable readline functions shell-backward-kill-word and shell-kill-word | |
4254 | which kill words backward and forward, but use the same word boundaries | |
4255 | as shell-forward-word and shell-backward-word. | |
4256 | ||
4257 | 4. New Features in Readline | |
4258 | ||
4259 | a. If the kernel supports it, readline displays special characters | |
4260 | corresponding to a keyboard-generated signal when the signal is received. | |
4261 | ||
4262 | ------------------------------------------------------------------------------ | |
4263 | This document details the changes between this version, bash-4.0-alpha, | |
4264 | and the previous version, bash-3.2-release. | |
4265 | ||
4266 | 1. Changes to Bash | |
4267 | ||
4268 | a. Fixed several bugs in old-style `` command substitution parsing, including | |
4269 | comment parsing and quoted string handling. | |
4270 | ||
4271 | b. Fixed problems parsing arguments to the [[ command's =~ regular expression | |
4272 | matching operator: metacharacter and whitespace parsing. | |
4273 | ||
4274 | c. Fixed a bug that caused the shell to inappropriately reuse high-numbered | |
4275 | file descriptors it used internally. | |
4276 | ||
4277 | d. Fixed a bug in pattern replacement word expansions that caused a `/' as | |
4278 | the first character of an expanded pattern to be mistaken for a global | |
4279 | replacement specifier. | |
4280 | ||
4281 | e. Fixed several problems with the asprintf and snprintf replacement functions | |
4282 | that caused hangs and crashes. | |
4283 | ||
4284 | f. Fixed a bug in the calculation of the current and previous job that caused | |
4285 | it to refer to incorrect jobs. | |
4286 | ||
4287 | g. Fixed a bug in the check for the validity of a hashed command pathname that | |
4288 | caused unnecessary hash table deletions and additions. | |
4289 | ||
4290 | h. Fixed a bug that caused child processes to inherit the wrong value for $!. | |
4291 | ||
4292 | i. Fixed a bug that caused `.' to fail to read and execute commands from non- | |
4293 | regular files such as devices or named pipes. | |
4294 | ||
4295 | j. Fixed a bug in printf formatting for the %x and %X expansions that occurred | |
4296 | on some systems. | |
4297 | ||
4298 | k. Fixed a bug that caused the shell to crash when creating temporary files if | |
4299 | $TMPDIR named a non-writable directory. | |
4300 | ||
4301 | l. Fixed a bug that caused the shell to ignore $TMPDIR when creating temporary | |
4302 | files under some circumstances. | |
4303 | ||
4304 | m. Fixed a bug that caused named pipes created by process substitution to not | |
4305 | be cleaned up. | |
4306 | ||
4307 | n. Fixed a bug that caused HISTTIMEFORMAT to not be honored when it appeared | |
4308 | in the initial shell environment. | |
4309 | ||
4310 | o. Fixed several bugs in the expansion of $* and $@ (quoted and unquoted) | |
4311 | when IFS is null or contains non-whitespace characters; the same changes | |
4312 | apply to arrays subscripted with * or @. | |
4313 | ||
4314 | p. Fixed several problems with pattern substitution expansions on the | |
4315 | positional parameters and arrays subscripted with * or @ that occurred | |
4316 | when $IFS was set to the empty string. | |
4317 | ||
4318 | q. Made a change to the default locale initialization code that should | |
4319 | result in better behavior from the locale-aware library functions. | |
4320 | ||
4321 | r. Fixed a bug that caused compacting the jobs list to drop jobs. | |
4322 | ||
4323 | s. Fixed a bug that caused jumps back to the top-level processing loop from | |
4324 | a builtin command to leave the shell in an inconsistent state. | |
4325 | ||
4326 | t. Fixed a bug that caused characters that would be escaped internally to be | |
4327 | doubled when escaped with a backslash. | |
4328 | ||
4329 | u. Fixed the initialization of mailboxes to not cause maildirs to be read | |
4330 | (and stat(2) called for every message file) at shell startup. | |
4331 | ||
4332 | v. Fixed a bug that caused the shell to not display $PS2 when the read builtin | |
4333 | reads a line continued with a backslash. | |
4334 | ||
4335 | w. Fixed a bug that caused errors in word splitting when $IFS contained | |
4336 | characters used for internal quoting. | |
4337 | ||
4338 | x. Fixed bugs that caused problems with output from shell builtins not being | |
4339 | completely displayed on some systems. | |
4340 | ||
4341 | y. Fixed a bug that caused output to be lost when a redirection is acting on | |
4342 | the shell's output file descriptor. | |
4343 | ||
4344 | z. Fixed bugs caused by shell builtins not checking for all write errors. | |
4345 | ||
4346 | aa. Fixed a problem that caused the shell to dump core if expansions on the | |
4347 | pattern passed to the pattern removal word expansions resulted in expansion | |
4348 | errors. | |
4349 | ||
4350 | bb. Fixed a bug that caused bash to loop infinitely after creating and | |
4351 | waiting for 4096 jobs. | |
4352 | ||
4353 | cc. Fixed a bug that caused bash to lose the status of a background job under | |
4354 | certain circumstances. | |
4355 | ||
4356 | dd. Fixed a bug that caused bash to not look in the temporary environment | |
4357 | when performing variable lookup under certain circumstances. | |
4358 | ||
4359 | ee. Fixed a bug that caused bash to close file descriptors greater than 10 | |
4360 | when they were used in redirections. | |
4361 | ||
4362 | ff. Fixed a problem that caused the shell to attempt to read from the standard | |
4363 | input when called as `bash -i script'. | |
4364 | ||
4365 | gg. Fixed a memory leak and variable initialization problems when the -v option | |
4366 | was supplied to `printf' that could cause incorrect results. | |
4367 | ||
4368 | hh. Fixed a bug that caused the `read' builtin to count bytes when the -n option | |
4369 | was supplied, rather than (possibly multibyte) characters. | |
4370 | ||
4371 | ii. Fixed a bug when displaying a function due to not converting the function | |
4372 | to an external form. | |
4373 | ||
4374 | jj. Changed job control initialization to ensure that the shell has a tty | |
4375 | as its controlling terminal before enabling job control. | |
4376 | ||
4377 | kk. Fixed a bug with the `test' builtin that caused it to misinterpret | |
4378 | arguments beginning with `-' but containing more than one character. | |
4379 | ||
4380 | ll. Fixed bug that could cause the shell to dump core in certain cases where | |
4381 | a command sets the SIGINT disposition to the default. | |
4382 | ||
4383 | mm. Fixed a bug in the pattern replacement (affecting both word expansion | |
4384 | and the `fc' builtin) that occurred when the pattern and replacement | |
4385 | strings were empty. | |
4386 | ||
4387 | nn. Fixed a bug that caused an arithmetic evaluation error to disable all | |
4388 | further evaluation. | |
4389 | ||
4390 | oo. Fixed a bug in pathname expansion that caused it to interpret backslashes | |
4391 | in the pathname as quoting characters. | |
4392 | ||
4393 | pp. Fixed a bug in the replacement getcwd() implementation that could cause | |
4394 | memory to be overwritten. | |
4395 | ||
4396 | qq. When in Posix mode, the `ulimit' builtin now uses a block size of 512 for | |
4397 | the `-c' and `-f' options. | |
4398 | ||
4399 | rr. Brace expansion now allows process substitutions to pass through unchanged. | |
4400 | ||
4401 | ss. Fixed a problem in the command name completion code to avoid quoting | |
4402 | escaped special characters twice when the command name begins with a tilde. | |
4403 | ||
4404 | tt. Fixed a problem in the printf builtin that resulted in single-byte | |
4405 | output for the "'" escape, even when using multibyte characters. | |
4406 | ||
4407 | uu. Fixed a bug that caused the failure exit status to be lost when redirections | |
4408 | attached to a compound command failed. | |
4409 | ||
4410 | vv. Fixed a bug that caused the internal random number generator to not be | |
4411 | re-seeded correctly when creating a subshell. | |
4412 | ||
4413 | ww. Fixed a bug that could cause the bash replacement getcwd to overwrite | |
4414 | memory. | |
4415 | ||
4416 | xx. Fixed a bug that caused the shell to not receive SIGINT if it was sent | |
4417 | while the shell was waiting for a command substitution to terminate, and | |
4418 | make sure the exit status is correct when it does. | |
4419 | ||
4420 | yy. Fixed a bug that resulted in the second and subsequent children spawned | |
4421 | by a shell begun to run a command substitution being placed into the | |
4422 | wrong process group. | |
4423 | ||
4424 | zz. Fixed a bug that caused the results of successful tilde expansion to be | |
4425 | subject to pathname expansion and word splitting. | |
4426 | ||
4427 | aaa. Fixed a bug that could cause the shell to hang if it encountered an | |
4428 | error that caused it to jump back to the top processing loop during a | |
4429 | command substitution or `eval' command. | |
4430 | ||
4431 | bbb. Fixed a bug that caused the `read' builtin to use the tty's attributes | |
4432 | instead of those of the file descriptor passed with the -u option when | |
4433 | processing the -n and -d options. | |
4434 | ||
4435 | ccc. Fixed a bug that caused incorrect expansion of ${array[@]:foo} if the | |
4436 | first character of $IFS was not whitespace. | |
4437 | ||
4438 | ddd. Fixed a bug that occurred when scanning for the ending delimiter of a | |
4439 | ${parameter/pat/sub} expansion. | |
4440 | ||
4441 | eee. Fixed a bug that caused the shell to inappropriately expand command | |
4442 | substitutions in words when expanding directory names for completion. | |
4443 | ||
4444 | fff. Fixed a bug that caused the `fc' builtin to look too far back in the | |
4445 | history list under certain circumstances. | |
4446 | ||
4447 | ggg. Fixed a bug that caused a shell running in Posix mode to search $PWD for | |
4448 | a file specified as an argument to source/. when the file was not found | |
4449 | in $PATH. | |
4450 | ||
4451 | hhh. Fixed a bug that caused the shell to modify the case of a command word | |
4452 | found via command completion when the shell was performing case- | |
4453 | insensitive completion. | |
4454 | ||
4455 | iii. Fixed a bug that caused the shell to search $PATH for an argument to | |
4456 | source/. even when it contained a `/'. | |
4457 | ||
4458 | jjj. Fixed a bug that caused brace expansion to misorder expansions when the | |
4459 | locale did not have a collating order like aAbBcC...zZ. | |
4460 | ||
4461 | kkk. Fixed a bug that did not allow `set +o history' to have any effect when | |
4462 | run in a startup file or from a sourced file. | |
4463 | ||
4464 | lll. Fixed a bug with the precedence of the ?: conditional arithmetic operator. | |
4465 | ||
4466 | mmm. Fixed a bug that caused side effects of temporary variable assignments | |
4467 | to persist in the shell environment. | |
4468 | ||
4469 | nnn. Fixed a bug that caused the terminal to be left in non-canonical mode | |
4470 | when using editing commands that invoke the an editor on the current | |
4471 | command line. | |
4472 | ||
4473 | ooo. Fixed a bug that caused globbing characters and characters in $IFS to not | |
4474 | be quoted appropriately when displaying assignment statements. | |
4475 | ||
4476 | ppp. Fixed a bug that caused the `-e' option to be inherited when sourcing a | |
4477 | file or evaluating a command with `eval' even if the return value of the | |
4478 | command was supposed to be ignored. | |
4479 | ||
4480 | qqq. Fixed a bug that caused the shell to attempt to created variables with | |
4481 | invalid names if such names appeared in the initial environment. | |
4482 | ||
4483 | rrr. Fixed a bug with quote removal in strings where the final character is a | |
4484 | backslash. | |
4485 | ||
4486 | sss. Fixed a bug that caused the effects of special variables to persist even | |
4487 | when the variables were unset as part of the shell reinitializing itself | |
4488 | to execute a shell script. | |
4489 | ||
4490 | ttt. Fixed a bug that caused the history to not be saved after `history -c' or | |
4491 | `history -d' was executed until a sufficient number of commands had been | |
4492 | saved to the history. | |
4493 | ||
4494 | uuu. Bash now parses command substitutions according to Posix rules: parsing | |
4495 | the command contained in $() to find the closing delimiter. | |
4496 | ||
4497 | vvv. Fixed a bug that caused traps on SIGCHLD set in a SIGCHLD handler to | |
4498 | not persist. | |
4499 | ||
4500 | www. Fixed a bug that didn't allow SIGCHLD to interrupt the `wait' builtin | |
4501 | as Posix specifies. | |
4502 | ||
4503 | xxx. Invalid numeric arguments to shell builtins no longer cause the shell to | |
4504 | short-circuit any executing compound command. | |
4505 | ||
4506 | yyy. Fixed a bug that caused the exit status to be lost when `break' was | |
4507 | used to short-circuit a loop's execution. | |
4508 | ||
4509 | zzz. Fixed a bug that caused stray ^? characters to be left in expansions of | |
4510 | "${array[*]}". | |
4511 | ||
4512 | aaaa. Bash now prints better error messages for here documents terminated by | |
4513 | EOF and for identifying the incorrect token in an invalid arithmetic | |
4514 | expression. | |
4515 | ||
4516 | bbbb. Fixed a bug in the variable length word expansion that caused it to | |
4517 | incorrectly calculate the number of multibyte characters. | |
4518 | ||
4519 | cccc. Fixed a race condition that could result in the top-level shell setting | |
4520 | the terminal's process group to an incorrect value if the process | |
4521 | group was changed by a child of a child of the shell. | |
4522 | ||
4523 | dddd. Fixed a bug that caused here documents belonging to commands within a | |
4524 | compound command to be displayed in a syntactially-incorrect form, which | |
4525 | prevented them from being re-read as input. | |
4526 | ||
4527 | eeee. The shell displays more warnings about failures to set the locale. | |
4528 | ||
4529 | ffff. Fixed a bug that caused the body of a here-document to not be saved to | |
4530 | the history list. | |
4531 | ||
4532 | gggg. Fixed a bug that caused configure to incorrectly conclude that FreeBSD | |
4533 | had /dev/fd available, resulting in problems with process substitution. | |
4534 | ||
4535 | 2. Changes to Readline | |
4536 | ||
4537 | a. Fixed a number of redisplay errors in environments supporting multibyte | |
4538 | characters. | |
4539 | ||
4540 | b. Fixed bugs in vi command mode that caused motion commands to inappropriately | |
4541 | set the mark. | |
4542 | ||
4543 | c. When using the arrow keys in vi insertion mode, readline allows movement | |
4544 | beyond the current end of the line (unlike command mode). | |
4545 | ||
4546 | d. Fixed bugs that caused readline to loop when the terminal has been taken | |
4547 | away and reads return -1/EIO. | |
4548 | ||
4549 | e. Fixed bugs in redisplay occurring when displaying prompts containing | |
4550 | invisible characters. | |
4551 | ||
4552 | f. Fixed a bug that caused the completion append character to not be reset to | |
4553 | the default after an application-specified completion function changed it. | |
4554 | ||
4555 | g. Fixed a problem that caused incorrect positioning of the cursor while in | |
4556 | emacs editing mode when moving forward at the end of a line while using | |
4557 | a locale supporting multibyte characters. | |
4558 | ||
4559 | h. Fixed an off-by-one error that caused readline to drop every 511th | |
4560 | character of buffered input. | |
4561 | ||
4562 | i. Fixed a bug that resulted in SIGTERM not being caught or cleaned up. | |
4563 | ||
4564 | j. Fixed redisplay bugs caused by multiline prompts with invisible characters | |
4565 | or no characters following the final newline. | |
4566 | ||
4567 | k. Fixed redisplay bug caused by prompts consisting solely of invisible | |
4568 | characters. | |
4569 | ||
4570 | l. Fixed a bug in the code that buffers characters received very quickly in | |
4571 | succession which caused characters to be dropped. | |
4572 | ||
4573 | m. Fixed a bug that caused readline to reference uninitialized data structures | |
8868edaf | 4574 | if it received a SIGWINCH before completing initialization. |
3185942a JA |
4575 | |
4576 | n. Fixed a bug that caused the vi-mode `last command' to be set incorrectly | |
4577 | and therefore unrepeatable. | |
4578 | ||
4579 | o. Fixed a bug that caused readline to disable echoing when it was being used | |
4580 | with an output file descriptor that was not a terminal. | |
4581 | ||
4582 | p. Readline now blocks SIGINT while manipulating internal data structures | |
4583 | during redisplay. | |
4584 | ||
4585 | q. Fixed a bug in redisplay that caused readline to segfault when pasting a | |
4586 | very long line (over 130,000 characters). | |
4587 | ||
4588 | r. Fixed bugs in redisplay when using prompts with no visible printing | |
4589 | characters. | |
4590 | ||
4591 | 3. New Features in Bash | |
4592 | ||
4593 | a. When using substring expansion on the positional parameters, a starting | |
4594 | index of 0 now causes $0 to be prefixed to the list. | |
4595 | ||
4596 | b. The `help' builtin now prints its columns with entries sorted vertically | |
4597 | rather than horizontally. | |
4598 | ||
4599 | c. There is a new variable, $BASHPID, which always returns the process id of | |
4600 | the current shell. | |
4601 | ||
4602 | d. There is a new `autocd' option that, when enabled, causes bash to attempt | |
4603 | to `cd' to a directory name that is supplied as the first word of a | |
4604 | simple command. | |
4605 | ||
4606 | e. There is a new `checkjobs' option that causes the shell to check for and | |
4607 | report any running or stopped jobs at exit. | |
4608 | ||
4609 | f. The programmable completion code exports a new COMP_TYPE variable, set to | |
4610 | a character describing the type of completion being attempted. | |
4611 | ||
4612 | g. The programmable completion code exports a new COMP_KEY variable, set to | |
4613 | the character that caused the completion to be invoked (e.g., TAB). | |
4614 | ||
4615 | h. If creation of a child process fails due to insufficient resources, bash | |
4616 | will try again several times before reporting failure. | |
4617 | ||
4618 | i. The programmable completion code now uses the same set of characters as | |
4619 | readline when breaking the command line into a list of words. | |
4620 | ||
4621 | j. The block multiplier for the ulimit -c and -f options is now 512 when in | |
4622 | Posix mode, as Posix specifies. | |
4623 | ||
4624 | k. Changed the behavior of the read builtin to save any partial input received | |
4625 | in the specified variable when the read builtin times out. This also | |
4626 | results in variables specified as arguments to read to be set to the empty | |
4627 | string when there is no input available. When the read builtin times out, | |
4628 | it returns an exit status greater than 128. | |
4629 | ||
4630 | l. The shell now has the notion of a `compatibility level', controlled by | |
4631 | new variables settable by `shopt'. Setting this variable currently | |
4632 | restores the bash-3.1 behavior when processing quoted strings on the rhs | |
4633 | of the `=~' operator to the `[[' command. | |
4634 | ||
4635 | m. The `ulimit' builtin now has new -b (socket buffer size) and -T (number | |
4636 | of threads) options. | |
4637 | ||
4638 | n. The -p option to `declare' now displays all variable values and attributes | |
4639 | (or function values and attributes if used with -f). | |
4640 | ||
4641 | o. There is a new `compopt' builtin that allows completion functions to modify | |
4642 | completion options for existing completions or the completion currently | |
4643 | being executed. | |
4644 | ||
4645 | p. The `read' builtin has a new -i option which inserts text into the reply | |
4646 | buffer when using readline. | |
4647 | ||
4648 | q. A new `-E' option to the complete builtin allows control of the default | |
4649 | behavior for completion on an empty line. | |
4650 | ||
4651 | r. There is now limited support for completing command name words containing | |
4652 | globbing characters. | |
4653 | ||
4654 | s. Changed format of internal help documentation for all builtins to roughly | |
4655 | follow man page format. | |
4656 | ||
4657 | t. The `help' builtin now has a new -d option, to display a short description, | |
4658 | and a -m option, to print help information in a man page-like format. | |
4659 | ||
4660 | u. There is a new `mapfile' builtin to populate an array with lines from a | |
4661 | given file. | |
4662 | ||
4663 | v. If a command is not found, the shell attempts to execute a shell function | |
4664 | named `command_not_found_handle', supplying the command words as the | |
4665 | function arguments. | |
4666 | ||
4667 | w. There is a new shell option: `globstar'. When enabled, the globbing code | |
4668 | treats `**' specially -- it matches all directories (and files within | |
4669 | them, when appropriate) recursively. | |
4670 | ||
4671 | x. There is a new shell option: `dirspell'. When enabled, the filename | |
4672 | completion code performs spelling correction on directory names during | |
4673 | completion. | |
4674 | ||
4675 | y. The `-t' option to the `read' builtin now supports fractional timeout | |
4676 | values. | |
4677 | ||
4678 | z. Brace expansion now allows zero-padding of expanded numeric values and | |
4679 | will add the proper number of zeroes to make sure all values contain the | |
4680 | same number of digits. | |
4681 | ||
4682 | aa. There is a new bash-specific bindable readline function: `dabbrev-expand'. | |
4683 | It uses menu completion on a set of words taken from the history list. | |
4684 | ||
4685 | bb. The command assigned to a key sequence with `bind -x' now sets two new | |
4686 | variables in the environment of the executed command: READLINE_LINE_BUFFER | |
4687 | and READLINE_POINT. The command can change the current readline line | |
4688 | and cursor position by modifying READLINE_LINE_BUFFER and READLINE_POINT, | |
4689 | respectively. | |
4690 | ||
0001803f | 4691 | cc. There is a new &>> redirection operator, which appends the standard output |
3185942a JA |
4692 | and standard error to the named file. |
4693 | ||
4694 | dd. The parser now understands `|&' as a synonym for `2>&1 |', which redirects | |
4695 | the standard error for a command through a pipe. | |
4696 | ||
4697 | ee. The new `;&' case statement action list terminator causes execution to | |
4698 | continue with the action associated with the next pattern in the | |
4699 | statement rather than terminating the command. | |
4700 | ||
4701 | ff. The new `;;&' case statement action list terminator causes the shell to | |
4702 | test the next set of patterns after completing execution of the current | |
4703 | action, rather than terminating the command. | |
4704 | ||
4705 | gg. The shell understands a new variable: PROMPT_DIRTRIM. When set to an | |
4706 | integer value greater than zero, prompt expansion of \w and \W will | |
4707 | retain only that number of trailing pathname components and replace | |
4708 | the intervening characters with `...'. | |
4709 | ||
4710 | hh. There are new case-modifying word expansions: uppercase (^[^]) and | |
4711 | lowercase (,[,]). They can work on either the first character or | |
4712 | array element, or globally. They accept an optional shell pattern | |
4713 | that determines which characters to modify. There is an optionally- | |
4714 | configured feature to include capitalization operators. | |
4715 | ||
4716 | ii. The shell provides associative array variables, with the appropriate | |
4717 | support to create, delete, assign values to, and expand them. | |
4718 | ||
4719 | jj. The `declare' builtin now has new -l (convert value to lowercase upon | |
4720 | assignment) and -u (convert value to uppercase upon assignment) options. | |
4721 | There is an optionally-configurable -c option to capitalize a value at | |
4722 | assignment. | |
4723 | ||
4724 | kk. There is a new `coproc' reserved word that specifies a coprocess: an | |
4725 | asynchronous command run with two pipes connected to the creating shell. | |
4726 | Coprocs can be named. The input and output file descriptors and the | |
4727 | PID of the coprocess are available to the calling shell in variables | |
4728 | with coproc-specific names. | |
4729 | ||
4730 | 4. New Features in Readline | |
4731 | ||
4732 | a. A new variable, rl_sort_completion_matches; allows applications to inhibit | |
4733 | match list sorting (but beware: some things don't work right if | |
4734 | applications do this). | |
4735 | ||
4736 | b. A new variable, rl_completion_invoking_key; allows applications to discover | |
4737 | the key that invoked rl_complete or rl_menu_complete. | |
4738 | ||
4739 | c. The functions rl_block_sigint and rl_release_sigint are now public and | |
4740 | available to calling applications who want to protect critical sections | |
4741 | (like redisplay). | |
4742 | ||
4743 | d. The functions rl_save_state and rl_restore_state are now public and | |
4744 | available to calling applications; documented rest of readline's state | |
4745 | flag values. | |
4746 | ||
4747 | e. A new user-settable variable, `history-size', allows setting the maximum | |
4748 | number of entries in the history list. | |
4749 | ||
4750 | f. There is a new implementation of menu completion, with several improvements | |
4751 | over the old; the most notable improvement is a better `completions | |
4752 | browsing' mode. | |
4753 | ||
4754 | g. The menu completion code now uses the rl_menu_completion_entry_function | |
4755 | variable, allowing applications to provide their own menu completion | |
4756 | generators. | |
4757 | ||
4758 | h. There is support for replacing a prefix of a pathname with a `...' when | |
4759 | displaying possible completions. This is controllable by setting the | |
4760 | `completion-prefix-display-length' variable. Matches with a common prefix | |
4761 | longer than this value have the common prefix replaced with `...'. | |
4762 | ||
4763 | i. There is a new `revert-all-at-newline' variable. If enabled, readline will | |
4764 | undo all outstanding changes to all history lines when `accept-line' is | |
4765 | executed. | |
4766 | ||
4767 | ------------------------------------------------------------------------------ | |
0628567a JA |
4768 | This document details the changes between this version, bash-3.2-release, |
4769 | and the previous version, bash-3.2-beta. | |
4770 | ||
4771 | 1. Changes to Bash | |
4772 | ||
4773 | a. Fixed a bug that caused the temporary environment passed to a command to | |
4774 | affect the shell's environment under certain circumstances. | |
4775 | ||
4776 | b. Fixed a bug in the printf builtin that caused the %q format specifier to | |
4777 | ignore empty string arguments. | |
4778 | ||
4779 | c. Improved multibyte character environment detection at configuration time. | |
4780 | ||
4781 | d. Fixed a bug in the read builtin that left spurious escape characters in the | |
4782 | input after processing backslashes when assigning to an array variable. | |
4783 | ||
4784 | 2. Changes to Readline | |
4785 | ||
4786 | a. Fixed a redisplay bug that occurred in multibyte-capable locales when the | |
4787 | prompt was one character longer than the screen width. | |
4788 | ------------------------------------------------------------------------------ | |
4789 | This document details the changes between this version, bash-3.2-beta, | |
4790 | and the previous version, bash-3.2-alpha. | |
4791 | ||
4792 | 1. Changes to Bash | |
4793 | ||
4794 | a. Changed the lexical analyzer to treat locale-specific blank characters as | |
4795 | white space. | |
4796 | ||
4797 | b. Fixed a bug in command printing to avoid confusion between redirections and | |
4798 | process substitution. | |
4799 | ||
4800 | c. Fixed problems with cross-compiling originating from inherited environment | |
4801 | variables. | |
4802 | ||
4803 | d. Added write error reporting to printf builtin. | |
4804 | ||
4805 | e. Fixed a bug in the variable expansion code that could cause a core dump in | |
4806 | a multi-byte locale. | |
4807 | ||
4808 | f. Fixed a bug that caused substring expansion of a null string to return | |
4809 | incorrect results. | |
4810 | ||
4811 | g. BASH_COMMAND now retains its previous value while executing commands as the | |
4812 | result of a trap, as the documentation states. | |
4813 | ||
4814 | 2. Changes to Readline | |
4815 | ||
4816 | a. Fixed a bug with prompt redisplay in a multi-byte locale to avoid redrawing | |
4817 | the prompt and input line multiple times. | |
4818 | ||
4819 | b. Fixed history expansion to not be confused by here-string redirection. | |
4820 | ||
4821 | c. Readline no longer treats read errors by converting them to newlines, as | |
4822 | it does with EOF. This caused partial lines to be returned from readline(). | |
4823 | ||
4824 | ------------------------------------------------------------------------------ | |
4825 | This document details the changes between this version, bash-3.2-alpha, | |
4826 | and the previous version, bash-3.1-release. | |
4827 | ||
4828 | 1. Changes to Bash | |
4829 | ||
4830 | a. Fixed a source bug that caused the minimal configuration to not compile. | |
4831 | ||
4832 | b. Fixed memory leaks in error handling for the `read' builtin. | |
4833 | ||
4834 | c. Changed the [[ and (( compound commands to set PIPESTATUS with their exit | |
4835 | status. | |
4836 | ||
4837 | d. Fixed some parsing problems with compound array assignments. | |
4838 | ||
4839 | e. Added additional configuration changes for: NetBSD (incomplete multibyte | |
4840 | character support) | |
4841 | ||
4842 | f. Fixed two bugs with local array variable creation when shadowing a variable | |
4843 | of the same name from a previous context. | |
4844 | ||
4845 | g. Fixed the `read' builtin to restore the correct set of completion functions | |
4846 | if a timeout occurs. | |
4847 | ||
4848 | h. Added code to defer the initialization of HISTSIZE (and its stifling of the | |
4849 | history list) until the history file is loaded, allowing a startup file to | |
4850 | override the default value. | |
4851 | ||
4852 | i. Tightened up the arithmetic expression parsing to produce better error | |
4853 | messages when presented with invalid operators. | |
4854 | ||
4855 | j. Fixed the cross-compilation support to build the signal list at shell | |
4856 | invocation rather than compile time if cross-compiling. | |
4857 | ||
4858 | k. Fixed multibyte support for non-gcc compilers (or compilers that do not | |
4859 | allow automatic array variable sizing based on a non-constant value). | |
4860 | ||
4861 | l. Several fixes to the code that manages the list of terminated jobs and | |
4862 | their exit statuses, and the list of active and recently-terminated jobs | |
4863 | to avoid pid aliasing/wraparound and allocation errors. | |
4864 | ||
4865 | m. Fixed a problem that allowed scripts to die due to SIGINT while waiting | |
4866 | for children, even when started in the background or otherwise ignoring | |
4867 | SIGINT. | |
4868 | ||
4869 | n. Fixed a bug that caused shells invoked as -/bin/bash from not being | |
4870 | recognized as login shells. | |
4871 | ||
4872 | o. Fixed a problem that caused shells in the background to give the terminal | |
4873 | to a process group other than the foreground shell process group. | |
4874 | ||
4875 | p. Fixed a problem with extracting the `varname' in ${#varname}. | |
4876 | ||
4877 | q. Fixed the code that handles SIGQUIT to not exit immediately -- thereby | |
4878 | calling functions that may not be called in a signal handler context -- | |
4879 | but set a flag and exit afterward (like SIGINT). | |
4880 | ||
4881 | r. Changed the brace expansion code to skip over braces that don't begin a | |
4882 | valid matched brace expansion construct. | |
4883 | ||
4884 | s. Fixed `typeset' and `declare' to not require that their shell function | |
4885 | operands to be valid shell identifiers. | |
4886 | ||
4887 | t. Changed `test' to use access(2) with a temporary uid/euid swap when testing | |
4888 | file attributes and running setuid, and access(2) in most other cases. | |
4889 | ||
4890 | u. Changed completion code to not attempt command name completion on a line | |
4891 | consisting solely of whitespace when no_empty_command_completion is set. | |
4892 | ||
4893 | v. The `hash' builtin now prints nothing in posix mode when the hash table is | |
4894 | empty, and prints a message to that effect to stdout instead of stderr | |
4895 | when not in posix mode. | |
4896 | ||
4897 | w. Fixed a bug in the extended pattern matching code that caused it to fail to | |
4898 | match periods with certain patterns. | |
4899 | ||
4900 | x. Fixed a bug that caused the shell to dump core when performing filename | |
4901 | generation in directories with thousands of files. | |
4902 | ||
4903 | y. Returned to the original Bourne shell rules for parsing ``: no recursive | |
4904 | parsing of embedded quoted strings or ${...} constructs. | |
4905 | ||
8868edaf | 4906 | z. The inheritance of the DEBUG, RETURN, and ERR traps is now dependent only |
0628567a JA |
4907 | on the settings of the `functrace' and `errtrace' shell options, rather |
4908 | than whether or not the shell is in debugging mode. | |
4909 | ||
4910 | aa. Fixed a problem with $HOME being converted to ~ in the expansion of | |
4911 | members of the DIRSTACK array. | |
4912 | ||
4913 | bb. Fixed a problem with quoted arguments to arithmetic expansions in certain | |
4914 | constructs. | |
4915 | ||
4916 | cc. The command word completion code now no longer returns matching directories | |
4917 | while searching $PATH. | |
4918 | ||
4919 | dd. Fixed a bug with zero-padding and precision handling in snprintf() | |
4920 | replacement. | |
4921 | ||
4922 | ee. Fixed a bug that caused the command substitution code not to take embedded | |
4923 | shell comments into account. | |
4924 | ||
4925 | ff. Fixed a bug that caused $((...);(...)) to be misinterpreted as an | |
4926 | arithmetic substitution. | |
4927 | ||
4928 | gg. Fixed a bug in the prompt expansion code that inappropriately added a | |
4929 | \001 before a \002 under certain circumstances. | |
4930 | ||
4931 | hh. Fixed a bug that caused `unset LANG' to not properly reset the locale | |
4932 | (previous versions would set the locale back to what it was when bash | |
4933 | was started rather than the system's "native" locale). | |
4934 | ||
4935 | ii. Fixed a bug that could cause file descriptors > 10 to not be closed even | |
4936 | when closed explicitly by a script. | |
4937 | ||
4938 | jj. Fixed a bug that caused single quotes to be stripped from ANSI-C quoting | |
4939 | inside double-quoted command substitutions. | |
4940 | ||
4941 | kk. Fixed a bug that could cause core dumps when `return' was executed as the | |
4942 | last element of a pipeline inside a shell function. | |
4943 | ||
4944 | ll. Fixed a bug that caused DEBUG trap strings to overwrite commands stored in | |
4945 | the jobs list. | |
4946 | ||
4947 | 2. Changes to Readline | |
4948 | ||
4949 | a. Fixed a problem that caused segmentation faults when using readline in | |
4950 | callback mode and typing consecutive DEL characters on an empty line. | |
4951 | ||
4952 | b. Fixed several redisplay problems with multibyte characters, all having to | |
4953 | do with the different code paths and variable meanings between single-byte | |
4954 | and multibyte character redisplay. | |
4955 | ||
4956 | c. Fixed a problem with key sequence translation when presented with the | |
4957 | sequence \M-\C-x. | |
4958 | ||
4959 | d. Fixed a problem that prevented the `a' command in vi mode from being | |
4960 | undone and redone properly. | |
4961 | ||
4962 | e. Fixed a problem that prevented empty inserts in vi mode from being undone | |
4963 | properly. | |
4964 | ||
4965 | f. Fixed a problem that caused readline to initialize with an incorrect idea | |
4966 | of whether or not the terminal can autowrap. | |
4967 | ||
4968 | g. Fixed output of key bindings (like bash `bind -p') to honor the setting of | |
4969 | convert-meta and use \e where appropriate. | |
4970 | ||
4971 | h. Changed the default filename completion function to call the filename | |
4972 | dequoting function if the directory completion hook isn't set. This means | |
4973 | that any directory completion hooks need to dequote the directory name, | |
4974 | since application-specific hooks need to know how the word was quoted, | |
4975 | even if no other changes are made. | |
4976 | ||
4977 | i. Fixed a bug with creating the prompt for a non-interactive search string | |
4978 | when there are non-printing characters in the primary prompt. | |
4979 | ||
4980 | j. Fixed a bug that caused prompts with invisible characters to be redrawn | |
4981 | multiple times in a multibyte locale. | |
4982 | ||
4983 | k. Fixed a bug that could cause the key sequence scanning code to return the | |
4984 | wrong function. | |
4985 | ||
4986 | l. Fixed a problem with the callback interface that caused it to fail when | |
4987 | using multi-character keyboard macros. | |
4988 | ||
4989 | m. Fixed a bug that could cause a core dump when an edited history entry was | |
4990 | re-executed under certain conditions. | |
4991 | ||
4992 | n. Fixed a bug that caused readline to reference freed memory when attmpting | |
4993 | to display a portion of the prompt. | |
4994 | ||
4995 | 3. New Features in Bash | |
4996 | ||
4997 | a. Changed the parameter pattern replacement functions to not anchor the | |
4998 | pattern at the beginning of the string if doing global replacement - that | |
4999 | combination doesn't make any sense. | |
5000 | ||
5001 | b. When running in `word expansion only' mode (--wordexp option), inhibit | |
5002 | process substitution. | |
5003 | ||
5004 | c. Loadable builtins now work on MacOS X 10.[34]. | |
5005 | ||
5006 | d. Shells running in posix mode no longer set $HOME, as POSIX requires. | |
5007 | ||
5008 | e. The code that checks for binary files being executed as shell scripts now | |
5009 | checks only for NUL rather than any non-printing character. | |
5010 | ||
5011 | f. Quoting the string argument to the [[ command's =~ operator now forces | |
5012 | string matching, as with the other pattern-matching operators. | |
5013 | ||
5014 | 4. New Features in Readline | |
5015 | ||
5016 | a. Calling applications can now set the keyboard timeout to 0, allowing | |
5017 | poll-like behavior. | |
5018 | ||
5019 | b. The value of SYS_INPUTRC (configurable at compilation time) is now used as | |
5020 | the default last-ditch startup file. | |
5021 | ||
5022 | c. The history file reading functions now allow windows-like \r\n line | |
5023 | terminators. | |
5024 | ||
5025 | ------------------------------------------------------------------------------ | |
95732b49 JA |
5026 | This document details the changes between this version, bash-3.1-release, |
5027 | and the previous version, bash-3.1-rc2. | |
5028 | ||
5029 | 1. Changes to Readline | |
5030 | ||
5031 | a. Several changes to the multibyte redisplay code to fix problems with | |
5032 | prompts containing invisible characters. | |
5033 | ||
5034 | ------------------------------------------------------------------------------ | |
5035 | This document details the changes between this version, bash-3.1-rc2, | |
5036 | and the previous version, bash-3.1-rc1. | |
5037 | ||
5038 | 1. Changes to Bash | |
5039 | ||
5040 | a. Fixed a bug that caused a DEBUG trap to overwrite a command string that's | |
5041 | eventually attached to a background job. | |
5042 | ||
5043 | b. Changed some code so that filenames with leading tildes with spaces in the | |
5044 | name aren't tilde-expanded by the bash completion code. | |
5045 | ||
5046 | c. Fixed a bug that caused the pushd builtin to fail to change to | |
5047 | directories with leading `-'. | |
5048 | ||
5049 | d. Fixed a small memory leak in the programmable completion code. | |
5050 | ||
5051 | 2. Changes to Readline | |
5052 | ||
5053 | a. Fixed a redisplay bug caused by moving the cursor vertically to a line | |
5054 | with invisible characters in the prompt in a multibyte locale. | |
5055 | ||
5056 | b. Fixed a bug that could cause the terminal special chars to be bound in the | |
5057 | wrong keymap in vi mode. | |
5058 | ||
5059 | 3. New Features in Bash | |
5060 | ||
5061 | a. If compiled for strict POSIX conformance, LINES and COLUMNS may now | |
5062 | override the true terminal size. | |
5063 | ||
5064 | 4. New Features in Readline | |
5065 | ||
5066 | a. A new external application-controllable variable that allows the LINES | |
5067 | and COLUMNS environment variables to set the window size regardless of | |
5068 | what the kernel returns. | |
5069 | ||
5070 | ------------------------------------------------------------------------------ | |
5071 | This document details the changes between this version, bash-3.1-rc1, | |
5072 | and the previous version, bash-3.1-beta1. | |
5073 | ||
5074 | 1. Changes to Bash | |
5075 | ||
0628567a | 5076 | a. Fixed a bug that could cause core dumps due to accessing the current |
95732b49 JA |
5077 | pipeline while in the middle of modifying it. |
5078 | ||
5079 | b. Fixed a bug that caused pathnames with backslashes still quoting characters | |
5080 | to be passed to opendir(). | |
5081 | ||
5082 | c. Command word completion now obeys the setting of completion-ignore-case. | |
5083 | ||
5084 | d. Fixed a problem with redirection that caused file descriptors greater than | |
5085 | 2 to be inappropriately marked as close-on-exec. | |
5086 | ||
5087 | e. In Posix mode, after `wait' is called to wait for a particular process | |
5088 | explicitly, that process is removed from the list of processes known to | |
5089 | the shell, and subsequent attempts to wait for it return errors. | |
5090 | ||
5091 | f. Fixed a bug that caused extended pattern matching to incorrectly scan | |
5092 | backslash-escaped pattern characters. | |
5093 | ||
5094 | g. Fixed a synchronization problem that could cause core dumps when handling | |
5095 | a SIGWINCH. | |
5096 | ||
5097 | h. Fixed a bug that caused an unmatched backquote to be accepted without an | |
5098 | error when processing here documents. | |
5099 | ||
5100 | i. Fixed a small memory leak in the `cd' builtin. | |
5101 | ||
5102 | j. Fix for MacOS X so it gets the values for the HOSTTYPE, MACHTYPE, and | |
5103 | OSTYPE variables at build time, to support universal binaries. | |
5104 | ||
5105 | k. Fixed a bug that could cause an exit trap to return the exit status of | |
5106 | the trap command rather than the status as it was before the trap was | |
5107 | run as the shell's exit status. | |
5108 | ||
5109 | 2. New Features in Bash | |
5110 | ||
5111 | 3. Changes to Readline | |
5112 | ||
5113 | a. Fixed a bug that caused reversing the incremental search direction to | |
5114 | not work correctly. | |
5115 | ||
5116 | b. Fixed the vi-mode `U' command to only undo up to the first time insert mode | |
5117 | was entered, as Posix specifies. | |
5118 | ||
5119 | c. Fixed a bug in the vi-mode `r' command that left the cursor in the wrong | |
5120 | place. | |
5121 | ||
5122 | 4. New Features in Readline | |
5123 | ||
5124 | a. New application-callable auxiliary function, rl_variable_value, returns | |
5125 | a string corresponding to a readline variable's value. | |
5126 | ||
5127 | b. When parsing inputrc files and variable binding commands, the parser | |
5128 | strips trailing whitespace from values assigned to boolean variables | |
5129 | before checking them. | |
5130 | ||
5131 | ||
5132 | ------------------------------------------------------------------------------ | |
5133 | This document details the changes between this version, bash-3.1-beta1, | |
5134 | and the previous version, bash-3.1-alpha1. | |
5135 | ||
5136 | 1. Changes to Bash | |
5137 | ||
5138 | a. Added some system-specific signal names. | |
5139 | ||
5140 | b. Fixed a typo in the ulimit builtin to make `x' the right option to | |
8868edaf | 5141 | manipulate the limit on file locks. |
95732b49 JA |
5142 | |
5143 | c. Fixed a problem with using += to append to index 0 of an array variable | |
5144 | when not using subscript syntax. | |
5145 | ||
5146 | d. A few changes to configure.in to remove calls to obsolete or outdated | |
5147 | macros. | |
5148 | ||
5149 | e. Make sure changes to variables bash handles specially (e.g., LC_ALL) are | |
5150 | made when the variable is set in the temporary environment to a command. | |
5151 | ||
5152 | f. Make sure changes to variables bash handles specially (e.g., LC_ALL) are | |
5153 | made when the variable is modified using `printf -v'. | |
5154 | ||
5155 | g. The export environment is now remade on cygwin when HOME is changed, so | |
5156 | DLLs bash is linked against pick up the new value. This fixes problems | |
5157 | with tilde expansion when linking against and already-installed readline. | |
5158 | ||
5159 | h. Small fix to the logic for performing tilde expansion in posix mode, so | |
5160 | expansion on the right-hand side of an assignment statement takes place. | |
5161 | ||
5162 | i. Fixed a bug that prevented redirections associated with a shell function | |
5163 | from being executed when in a subshell. | |
5164 | ||
5165 | j. Fixed `source' and `.' builtins to not require an executable file when | |
5166 | searching $PATH for a file to source. | |
5167 | ||
5168 | k. Fixed a bug that caused incorrect word splitting in a function when IFS | |
5169 | was declared local, then unset. | |
5170 | ||
5171 | l. Fixed a problem with the `kill' builtin that prevented sending signals | |
5172 | to a process group under certain circumstances when providing a pid < 0. | |
5173 | ||
5174 | m. When in POSIX mode, `pwd' now checks that the value it prints is the same | |
5175 | directory as `.', even when displaying $PWD. | |
5176 | ||
5177 | n. Fixed a problem with the `read' builtin when reading a script from standard | |
5178 | input and reading data from the same file. | |
5179 | ||
5180 | o. Fixed a problem with the `type' and `command' builtins that caused absolute | |
5181 | pathnames to be displayed incorrectly. | |
5182 | ||
5183 | p. Some changes to the `bg' builtin for POSIX conformance. | |
5184 | ||
5185 | q. The `fc' builtin now removes the `fc' command that caused it to invoke an | |
5186 | editor on specified history entries from the history entirely, rather than | |
5187 | simply ignoring it. | |
5188 | ||
5189 | r. When in POSIX mode, the `v' command in vi editing mode simply invokes vi | |
5190 | on the current command, rather than checking $FCEDIT and $EDITOR. | |
5191 | ||
5192 | s. Fixed a small memory leak in the pathname canonicalization code. | |
5193 | ||
5194 | t. Fixed a bug that caused the expanded value of a $'...' string to be | |
5195 | incorrectly re-quoted if it occurred within a double-quoted ${...} | |
5196 | parameter expansion. | |
5197 | ||
5198 | u. Restored default emacs-mode key binding of M-TAB to dynamic-complete-history. | |
5199 | ||
5200 | v. Fixed a bug that caused core dumps when interrupting loops running builtins | |
5201 | on some systems. | |
5202 | ||
5203 | w. Make sure that some of the functions bash provides replacements for are | |
5204 | not cpp defines. | |
5205 | ||
5206 | x. The code that scans embedded commands for the parser (`...` and $(...)) is | |
5207 | now more aware of embedded comments and their effect on quoted strings. | |
5208 | ||
5209 | y. Changed the `-n' option to the `history' builtin to not reset the number of | |
5210 | history lines read in the current session after reading the new lines from | |
5211 | the history file if the history is being appended when it is written to | |
5212 | the file, since the appending takes care of the problem that the adjustment | |
5213 | was intended to solve. | |
5214 | ||
5215 | z. Improved the error message displayed when a shell script fails to execute | |
5216 | because the environment and size of command line arguments are too large. | |
5217 | ||
5218 | aa. A small fix to make sure that $HISTCMD is evaluated whenever the shell is | |
5219 | saving commands to the history list, not just when HISTSIZE is defined. | |
5220 | ||
5221 | 2. Changes to Readline | |
5222 | ||
5223 | a. The `change-case' command now correctly changes the case of multibyte | |
5224 | characters. | |
5225 | ||
5226 | b. Changes to the shared library construction scripts to deal with Windows | |
5227 | DLL naming conventions for Cygwin. | |
5228 | ||
5229 | c. Fixed the redisplay code to avoid core dumps resulting from a poorly-timed | |
5230 | SIGWINCH. | |
5231 | ||
5232 | d. Fixed the non-incremental search code in vi mode to dispose of any current | |
5233 | undo list when copying a line from the history into the current editing | |
5234 | buffer. | |
5235 | ||
5236 | e. The variable assignment code now ignores whitespace at the end of lines | |
5237 | when assigning to boolean variables. | |
5238 | ||
5239 | f. The `C-w' binding in incremental search now understands multibyte | |
5240 | characters. | |
5241 | ||
5242 | 3. New Features in Bash | |
5243 | ||
5244 | a. A new configuration option, `--enable-strict-posix-default', which will | |
5245 | build bash to be POSIX conforming by default. | |
5246 | ||
5247 | 4. New Features in Readline | |
5248 | ||
5249 | a. If the rl_completion_query_items is set to a value < 0, readline never | |
5250 | asks the user whether or not to view the possible completions. | |
5251 | ||
5252 | ------------------------------------------------------------------------------ | |
5253 | This document details the changes between this version, bash-3.1-alpha1, | |
5254 | and the previous version, bash-3.0-release. | |
5255 | ||
5256 | 1. Changes to Bash | |
5257 | ||
5258 | a. Fixed a bug that caused bash to crash if referencing an unset local array. | |
5259 | ||
5260 | b. Fixed a problem that caused tilde expansion to not be performed before | |
5261 | attempting globbing word completion. | |
5262 | ||
5263 | c. Fixed an incompatibility so that a first argument to trap that's a valid | |
5264 | signal number will be trated as a signal rather than a command to execute. | |
5265 | ||
5266 | d. Fixed ${#word} expansion to correctly compute the length of a string | |
5267 | containing multibyte characters. | |
5268 | ||
5269 | e. Fixed a bug that caused bash to not pass the correct flags for signal | |
5270 | disposition to child processes. | |
5271 | ||
5272 | f. Fixed a bug that caused `fc -l' to list one too many history entries. | |
5273 | ||
5274 | g. Some fixes to `fc' for POSIX conformance. | |
5275 | ||
5276 | h. Some fixes to job status display for POSIX conformance. | |
5277 | ||
5278 | i. Fixed a bug that caused `command -v' to display output if a command was not | |
5279 | found -- it should be silent. | |
5280 | ||
5281 | j. In POSIX mode, `type' and `command -[vV]' do not report non-executable | |
5282 | files, even if the shell will attempt to execute them. | |
5283 | ||
5284 | k. Fixed a bug that caused the `==' operator to the [[ command to not attempt | |
5285 | extended pattern matching. | |
5286 | ||
5287 | l. Fixed the brace expansion code to handle characters whose value exceeds 128. | |
5288 | ||
5289 | m. Fixed `printf' to handle strings with a leading `\0' whose length is | |
5290 | non-zero. | |
5291 | ||
5292 | n. Fixed a couple of problems with brace expansion where `${' was handled | |
5293 | incorrectly. | |
5294 | ||
5295 | o. Fixed off-by-one error when calculating the upper bound of `offset' when | |
5296 | processing the ${array[@]:offset:length} expansion. | |
5297 | ||
5298 | p. System-specific configuration changes for: FreeBSD 5.x, Interix, MacOS X | |
5299 | 10.4, Linux 2.4+ kernels, Linux 3.x kernels, Dragonfly BSD, QNX 6.x, | |
5300 | Cygwin | |
5301 | ||
5302 | q. Fixed a bug that caused the shell to ignore the status of the rightmost | |
5303 | command in a pipeline when the `pipefail' option was enabled. | |
5304 | ||
5305 | r. Fixed a completion bug that caused core dumps when expanding a directory | |
5306 | name. | |
5307 | ||
5308 | s. Fixed a bug that prevented `hash -d' from removing commands from the hash | |
5309 | table. | |
5310 | ||
5311 | t. Fixed word splitting to avoid really bad quadratic performance when | |
5312 | expanding long lists. | |
5313 | ||
5314 | u. Fixed a bug that caused negative offsets in substring expansion to use the | |
5315 | wrong values. | |
5316 | ||
5317 | v. Fixed a bug in printf that caused it to not return failure on write errors. | |
5318 | ||
5319 | w. Fixed a bug that caused commands in subshells to not be properly timed. | |
5320 | ||
5321 | x. The shell parser no longer attempts to parse a compound assignment specially | |
5322 | unless in a position where an assignment statement is acceptable or parsing | |
5323 | arguments to a builtin that accepts assignment statements. | |
5324 | ||
5325 | y. Fixed a problem that caused a `case' statement to be added to the history | |
5326 | incorrectly as a single command if the `case word' was on one line and the | |
5327 | `in' on another. | |
5328 | ||
5329 | z. Fixed a problem that caused internal shell quoting characters to be | |
5330 | incorrectly quoted with backslashes under some circumstances. | |
5331 | ||
5332 | aa. The shell now performs correct word splitting when IFS contains multibyte | |
5333 | characters. | |
5334 | ||
5335 | bb. The mail checking code now resets the cached file information if the size | |
5336 | drops to 0, even if the times don't change. | |
5337 | ||
5338 | cc. A completed command name that is found in $PATH as well as the name of a | |
5339 | directory in the current directory no longer has a slash appended in certain | |
5340 | circumstances: a single instance found in $PATH when `.' is not in $PATH, | |
5341 | and multiple instances found in $PATH, even when `.' is in $PATH. | |
5342 | ||
5343 | dd. Incorporated tilde expansion into the word expansion code rather than as a | |
5344 | separately-called function, fixing some cases where it was performed | |
5345 | inappropriately (e.g., after the second `=' in an assignment statement or | |
5346 | in a double-quoted parameter expansion). | |
5347 | ||
5348 | ee. Fixed several bugs encountered when parsing compound assignment statements, | |
5349 | so that compound assignments appearing as arguments to builtins are no | |
5350 | longer double-expanded. | |
5351 | ||
5352 | ff. Fixed a bug in the command execution code that caused asynchronous commands | |
5353 | containing command substitutions to not put the terminal in the wrong | |
5354 | process group. | |
5355 | ||
5356 | gg. Bash now handles the case where the WCONTINUED flag causes waitpid() to | |
5357 | return -1/EINVAL at runtime as well as configuration time. | |
5358 | ||
5359 | hh. Fixed parser to generate an error when the pipeline `argument' to `!' or | |
5360 | `time' is NULL. | |
5361 | ||
5362 | ii. The shell now takes a little more care when manipulating file descriptors | |
5363 | greater than 9 with the `exec' builtin. | |
5364 | ||
5365 | jj. Fixed a bug that caused variable assignments preceding the `command' builtin | |
5366 | preceding a special builtin to be preserved after the command completed in | |
5367 | POSIX mode. | |
5368 | ||
5369 | kk. Fixed a bug that allowed variables beginning with a digit to be created. | |
5370 | ||
5371 | ll. Fixed a bug that caused a \<newline> to be removed when parsing a $'...' | |
5372 | construct. | |
5373 | ||
5374 | mm. A shell whose name begins with `-' will now be a restricted shell if the | |
5375 | remainder of the name indicates it should be restricted. | |
5376 | ||
5377 | nn. Fixed a bug that could cause a core dump if FUNCNAME were changed or unset | |
5378 | during a function's execution. | |
5379 | ||
5380 | oo. Fixed a bug that caused executing a `return' in a function to not execute | |
5381 | a RETURN trap. The RETURN trap is inherited by shell functions only if | |
5382 | function tracing is globally enabled or has been enabled for that function. | |
5383 | ||
5384 | pp. Fixed cases where var[@] was not handled exactly like var, when var is a | |
5385 | scalar variable. | |
5386 | ||
5387 | qq. Fixed a bug that caused the first character after a SIGINT to be discarded | |
5388 | under certain circumstances. | |
5389 | ||
5390 | rr. Fixed exit status code so that a suspended job returns 128+signal as its | |
5391 | exit status (preventing commands after it in `&&' lists from being | |
5392 | executed). | |
5393 | ||
5394 | ss. Fixed a bug that caused the shell parser state to be changed by executing | |
5395 | a shell function as a result of word completion. | |
5396 | ||
5397 | tt. Fixed a long-standing bug that caused '\177' characters in variable | |
5398 | values to be discarded when expanded in double-quoted strings. | |
5399 | ||
5400 | uu. Fixed a bug that caused $RANDOM to be re-seeded multiple times in a | |
5401 | subshell environment. | |
5402 | ||
5403 | vv. Extensive changes to the job management code to avoid the pid-reuse and | |
5404 | pid-aliasing problems caused by retaining the exit status of too many jobs, | |
5405 | but still retain as many background job statuses as POSIX requires. | |
5406 | ||
5407 | ww. Fixed a parser bug in processing \<newline> that caused things like | |
5408 | ||
5409 | ((echo 5) \ | |
5410 | (echo 6)) | |
5411 | ||
5412 | to not work correctly. | |
5413 | ||
5414 | xx. `pwd -P' now sets $PWD to a directory name containing no symbolic links | |
5415 | when in posix mode, as POSIX requires. | |
5416 | ||
5417 | yy. In posix mode, bash no longer sets $PWD to a name containing no symbolic | |
5418 | links if a directory is chosen from $CDPATH. | |
5419 | ||
5420 | zz. The word splitting code now treats an IFS character that is not space, | |
5421 | tab, or newline and any adjacent IFS white space as a single delimiter, as | |
5422 | SUSv3/XPG6 require. | |
5423 | ||
5424 | aaa. The `read' builtin now checks whether or not the number of fields read is | |
5425 | exactly the same as the number of variables instead of just assigning the | |
5426 | rest of the line (minus any trailing IFS white space) to the last | |
5427 | variable. This is what POSIX/SUS/XPG all require. | |
5428 | ||
5429 | bbb. Fixed a bug that caused `read' to always check whether or not fd 0 was a | |
5430 | pipe, even when reading from another file descriptor. | |
5431 | ||
5432 | ccc. Fixed a bug that caused short-circuiting of execution even if the return | |
5433 | value was being inverted. | |
5434 | ||
5435 | ddd. Fixed a bug that caused a core dump while decoding \W escapes in PS1 if | |
5436 | PWD was unset. | |
5437 | ||
5438 | eee. Fixed a bug in `read' that counted internal quoting characters for the | |
5439 | purposes of `read -n'. | |
5440 | ||
5441 | fff. Fixed a bug so that a function definition in a pipeline causes a child | |
5442 | process to be forked at the right time. | |
5443 | ||
5444 | ggg. Bash will not attempt to link against a readline library that doesn't | |
5445 | have rl_gnu_readline_p == 1. | |
5446 | ||
5447 | hhh. Fixed a bug that caused `read' to consume one too many characters when | |
5448 | reading a fixed number of characters and the Nth character is a backslash. | |
5449 | ||
5450 | iii. Fixed a bug that caused `unset' on variables in the temporary environment | |
5451 | to leave them set when `unset' completed. | |
5452 | ||
5453 | jjj. Fixed a bug that caused bash to close fd 2 if an `exec' failed and the | |
5454 | shell didn't exit. | |
5455 | ||
5456 | kkk. The completion code is more careful to not turn `/' or `///' into `//', | |
5457 | for those systems on which `//' has special meaning. | |
5458 | ||
5459 | lll. Fixed a bug that caused command substitution in asynchronous commands to | |
5460 | close the wrong file descriptors. | |
5461 | ||
5462 | mmm. The shell no longer prints status messages about terminated background | |
5463 | processes unless job control is active. | |
5464 | ||
5465 | nnn. Fixed a bug that prevented multiple consecutive invocations of `history -s' | |
5466 | from adding all the commands to the history list. | |
5467 | ||
5468 | ooo. Added a couple of changes to make arithmetic expansion more consistent in | |
5469 | all its contexts (still not perfect). | |
5470 | ||
5471 | ppp. Fixed a bug that caused the parser to occasionally not find the right | |
5472 | terminating "`" in an old-style command substitution. | |
5473 | ||
5474 | qqq. Fixed a bug that caused core dumps when the shell was reading its non- | |
5475 | interactive input from fd 0 and fd 0 was duplicated and restored using a | |
5476 | combination of `exec' (to save) and redirection (to restore). | |
5477 | ||
5478 | rrr. Fixed a problem that caused loops in sourced scripts to not be cleaned | |
5479 | up properly when a `return' is executed. | |
5480 | ||
5481 | sss. Change internal command substitution completion function to append a slash | |
5482 | to directory names in the command. | |
5483 | ||
5484 | 2. Changes to Readline | |
5485 | ||
5486 | a. Fixed a bug that caused multiliine prompts to be wrapped and displayed | |
5487 | incorrectly. | |
5488 | ||
5489 | b. Fixed a bug that caused ^P/^N in emacs mode to fail to display the current | |
5490 | line correctly. | |
5491 | ||
5492 | c. Fixed a problem in computing the number of invisible characters on the first | |
5493 | line of a prompt whose length exceeds the screen width. | |
5494 | ||
5495 | d. Fixed vi-mode searching so that failure preserves the current line rather | |
5496 | than the last line in the history list. | |
5497 | ||
5498 | e. Fixed the vi-mode `~' command (change-case) to have the correct behavior at | |
5499 | end-of-line when manipulating multibyte characters. | |
5500 | ||
5501 | f. Fixed the vi-mode `r' command (change-char) to have the correct behavior at | |
5502 | end-of-line when manipulating multibyte characters. | |
5503 | ||
5504 | g. Fixed multiple bugs in the redisplay of multibyte characters: displaying | |
5505 | prompts longer than the screen width containing multibyte characters, | |
5506 | ||
5507 | h. Fix the calculation of the number of physical characters in the prompt | |
5508 | string when it contains multibyte characters. | |
5509 | ||
5510 | i. A non-zero value for the `rl_complete_suppress_append' variable now causes | |
5511 | no `/' to be appended to a directory name. | |
5512 | ||
5513 | j. Fixed forward-word and backward-word to work when words contained | |
5514 | multibyte characters. | |
5515 | ||
5516 | k. Fixed a bug in finding the delimiter of a `?' substring when performing | |
5517 | history expansion in a locale that supports multibyte characters. | |
5518 | ||
5519 | l. Fixed a memory leak caused by not freeing the timestamp in a history entry. | |
5520 | ||
5521 | m. Fixed a bug that caused "\M-x" style key bindings to not obey the setting | |
5522 | of the `convert-meta' variable. | |
5523 | ||
5524 | n. Fixed saving and restoring primary prompt when prompting for incremental | |
5525 | and non-incremental searches; search prompts now display multibyte | |
5526 | characters correctly. | |
5527 | ||
5528 | o. Fixed a bug that caused keys originally bound to self-insert but shadowed | |
5529 | by a multi-character key sequence to not be inserted. | |
5530 | ||
5531 | p. Fixed code so rl_prep_term_function and rl_deprep_term_function aren't | |
5532 | dereferenced if NULL (matching the documentation). | |
5533 | ||
5534 | q. Extensive changes to readline to add enough state so that commands | |
5535 | requiring additional characters (searches, multi-key sequences, numeric | |
5536 | arguments, commands requiring an additional specifier character like | |
5537 | vi-mode change-char, etc.) work without synchronously waiting for | |
5538 | additional input. | |
5539 | ||
5540 | r. Lots of changes so readline builds and runs on MinGW. | |
5541 | ||
5542 | s. Readline no longer tries to modify the terminal settings when running in | |
5543 | callback mode. | |
5544 | ||
5545 | t. The Readline display code no longer sets the location of the last invisible | |
5546 | character in the prompt if the \[\] sequence is empty. | |
5547 | ||
5548 | 3. New Features in Bash | |
5549 | ||
5550 | a. Bash now understands LC_TIME as a special variable so that time display | |
5551 | tracks the current locale. | |
5552 | ||
5553 | b. BASH_ARGC, BASH_ARGV, BASH_SOURCE, and BASH_LINENO are no longer created | |
5554 | as `invisible' variables and may not be unset. | |
5555 | ||
5556 | c. In POSIX mode, if `xpg_echo' option is enabled, the `echo' builtin doesn't | |
5557 | try to interpret any options at all, as POSIX requires. | |
5558 | ||
5559 | d. The `bg' builtin now accepts multiple arguments, as POSIX seems to specify. | |
5560 | ||
5561 | e. Fixed vi-mode word completion and glob expansion to perform tilde | |
5562 | expansion. | |
5563 | ||
5564 | f. The `**' mathematic exponentiation operator is now right-associative. | |
5565 | ||
5566 | g. The `ulimit' builtin has new options: -i (max number of pending signals), | |
5567 | -q (max size of POSIX message queues), and -x (max number of file locks). | |
5568 | ||
5569 | h. A bare `%' once again expands to the current job when used as a job | |
5570 | specifier. | |
5571 | ||
5572 | i. The `+=' assignment operator (append to the value of a string or array) is | |
5573 | now supported for assignment statements and arguments to builtin commands | |
5574 | that accept assignment statements. | |
5575 | ||
5576 | j. BASH_COMMAND now preserves its value when a DEBUG trap is executed. | |
5577 | ||
5578 | k. The `gnu_errfmt' option is enabled automatically if the shell is running | |
5579 | in an emacs terminal window. | |
5580 | ||
5581 | l. New configuration option: --single-help-strings. Causes long help text | |
5582 | to be written as a single string; intended to ease translation. | |
5583 | ||
5584 | m. The COMP_WORDBREAKS variable now causes the list of word break characters | |
5585 | to be emptied when the variable is unset. | |
5586 | ||
5587 | n. An unquoted expansion of $* when $IFS is empty now causes the positional | |
5588 | parameters to be concatenated if the expansion doesn't undergo word | |
5589 | splitting. | |
5590 | ||
5591 | o. Bash now inherits $_ from the environment if it appears there at startup. | |
5592 | ||
5593 | p. New shell option: nocasematch. If non-zero, shell pattern matching ignores | |
5594 | case when used by `case' and `[[' commands. | |
5595 | ||
5596 | q. The `printf' builtin takes a new option: -v var. That causes the output | |
5597 | to be placed into var instead of on stdout. | |
5598 | ||
5599 | r. By default, the shell no longer reports processes dying from SIGPIPE. | |
5600 | ||
5601 | s. Bash now sets the extern variable `environ' to the export environment it | |
5602 | creates, so C library functions that call getenv() (and can't use the | |
5603 | shell-provided replacement) get current values of environment variables. | |
5604 | ||
5605 | 4. New Features in Readline | |
5606 | ||
5607 | a. The key sequence sent by the keypad `delete' key is now automatically | |
5608 | bound to delete-char. | |
5609 | ||
5610 | b. A negative argument to menu-complete now cycles backward through the | |
5611 | completion list. | |
5612 | ||
5613 | c. A new bindable readline variable: bind-tty-special-chars. If non-zero, | |
5614 | readline will bind the terminal special characters to their readline | |
5615 | equivalents when it's called (on by default). | |
5616 | ||
5617 | d. New bindable command: vi-rubout. Saves deleted text for possible | |
5618 | reinsertion, as with any vi-mode `text modification' command; `X' is bound | |
5619 | to this in vi command mode. | |
5620 | ||
5621 | ------------------------------------------------------------------------------ | |
b80f6443 JA |
5622 | This document details the changes between this version, bash-3.0-release, |
5623 | and the previous version, bash-3.0-rc1. | |
5624 | ||
5625 | 1. Changes to Bash | |
5626 | ||
5627 | a. Fixed a boundary overrun that could cause segmentation faults when the | |
5628 | completion code hands an incomplete construct to the word expansion | |
5629 | functions. | |
5630 | ||
5631 | b. Changed posix mode behavior so that an error in a variable assignment | |
5632 | preceding a special builtin causes a non-interactive shell to exit. | |
5633 | ||
5634 | c. Change the directory expansion portion of the completion code to not | |
5635 | expand embedded command substitutions if the directory name appears in | |
5636 | the file system. | |
5637 | ||
5638 | d. Fixed a problem that caused `bash -r' to turn on restrictions before | |
5639 | reading the startup files. | |
5640 | ||
5641 | e. Fixed a problem with the default operation of the `umask' builtin. | |
5642 | ||
5643 | 2. Changes to Readline | |
5644 | ||
5645 | a. Fixed a problem with readline saving the contents of the current line | |
5646 | before beginning a non-interactive search. | |
5647 | ||
5648 | b. Fixed a problem with EOF detection when using rl_event_hook. | |
5649 | ||
5650 | c. Fixed a problem with the vi mode `p' and `P' commands ignoring numeric | |
5651 | arguments. | |
5652 | ||
5653 | ------------------------------------------------------------------------------ | |
5654 | This document details the changes between this version, bash-3.0-rc1, | |
5655 | and the previous version, bash-3.0-beta1. | |
5656 | ||
5657 | 1. Changes to Bash | |
5658 | ||
5659 | a. Fixed a bug that caused incorrect behavior when referecing element 0 of | |
5660 | an array using $array, element 0 was unset, and `set -u' was enabled. | |
5661 | ||
5662 | b. System-specific changes for: SCO Unix 3.2, Tandem. | |
5663 | ||
5664 | c. Fixed a bug that caused inappropriate word splitting when a variable was | |
5665 | expanded within a double-quoted string that also included $@. | |
5666 | ||
5667 | d. Fixed a bug that caused `pwd' to not display anything in physical mode | |
5668 | when the file system had changed underneath the shell. | |
5669 | ||
5670 | e. Fixed a bug in the pre- and post- increment and decrement parsing in the | |
5671 | expression evaluator that caused errors when the operands and corresponding | |
5672 | operators were separated by whitespace. | |
5673 | ||
5674 | f. Fixed a bug that caused `history -p' to add an entry to the history list, | |
5675 | counter to the documentation. (Keeps the history expansions invoked by | |
5676 | emacs-mode command line editing from doing that as well.) | |
5677 | ||
5678 | g. Fixed a bug that could cause a core dump if `cd' is asked to print out a | |
5679 | pathname longer than PATH_MAX characters. | |
5680 | ||
5681 | h. Fixed a bug that caused jobs to be put into the wrong process group under | |
5682 | some circumstances after enabling job control with `set -m'. | |
5683 | ||
5684 | i. `unalias' now returns failure if no alias name arguments are supplied. | |
5685 | ||
5686 | j. Documented the characters not allowed to appear in an alias name. | |
5687 | ||
5688 | k. $* is no longer expanded as if in double quotes when it appears in the | |
5689 | body of a here document, as the SUS seems to require. | |
5690 | ||
5691 | l. The `bashbug' script now uses a directory in $TMPDIR for exclusive | |
5692 | access rather than trying to guess how the underlying OS provides for | |
5693 | secure temporary file creation. | |
5694 | ||
5695 | m. Fixed a few problems with `cd' and `pwd' when asked to operate on pathnames | |
5696 | longer than PATH_MAX characters. | |
5697 | ||
5698 | n. Fixed a memory leak caused when creating multiple local array variables | |
5699 | with identical names. | |
5700 | ||
5701 | o. Fixed a problem with calls to getcwd() so that bash now operates better | |
5702 | when the full pathname to the current directory is longer than PATH_MAX | |
5703 | bytes. | |
5704 | ||
5705 | p. The `trap' builtin now reports an error if a single non-signal argument | |
5706 | is specified. | |
5707 | ||
5708 | q. Fixed a bug that caused `umask' to not work correctly when presented | |
5709 | with a mask of all 0s. | |
5710 | ||
5711 | r. When `getopts' reaches the end of options, OPTARG is unset, as POSIX | |
5712 | appears to specify. | |
5713 | ||
5714 | s. Interactive mode now depends on whether or not stdin and stderr are | |
5715 | connected to a tty; formerly it was stdin and stdout. POSIX requires | |
5716 | this. | |
5717 | ||
5718 | t. Fixed vi-mode completion to work more as POSIX specifies (e.g., doing the | |
5719 | right kind of filename generation). | |
5720 | ||
5721 | 2. Changes to Readline | |
5722 | ||
5723 | a. Fixed a problem that could cause readline to refer to freed memory when | |
5724 | moving between history lines while doing searches. | |
5725 | ||
5726 | b. Improvements to the code that expands and displays prompt strings | |
5727 | containing multibyte characters. | |
5728 | ||
5729 | c. Fixed a problem with vi-mode not correctly remembering the numeric argument | |
5730 | to the last `c'hange command for later use with `.'. | |
5731 | ||
5732 | d. Fixed a bug in vi-mode that caused multi-digit count arguments to work | |
5733 | incorrectly. | |
5734 | ||
5735 | e. Fixed a problem in vi-mode that caused the last text modification command | |
5736 | to not be remembered across different command lines. | |
5737 | ||
5738 | f. Fixed problems with changing characters and changing case at the end of | |
5739 | the line. | |
5740 | ||
5741 | 3. New Features in Bash | |
5742 | ||
5743 | a. The `jobs', `kill', and `wait' builtins now accept job control notation | |
5744 | even if job control is not enabled. | |
5745 | ||
5746 | b. The historical behavior of `trap' that allows a missing `action' argument | |
5747 | to cause each specified signal's handling to be reset to its default is | |
5748 | now only supported when `trap' is given a single non-option argument. | |
5749 | ||
5750 | 4. New Features in Readline | |
5751 | ||
5752 | a. When listing completions, directories have a `/' appended if the | |
5753 | `mark-directories' option has been enabled. | |
5754 | ||
5755 | ------------------------------------------------------------------------------ | |
5756 | This document details the changes between this version, bash-3.0-beta1, | |
5757 | and the previous version, bash-3.0-alpha. | |
5758 | ||
5759 | 1. Changes to Bash | |
5760 | ||
5761 | a. Fixes to build correctly when arrays are not compiled into the shell. | |
5762 | ||
5763 | b. Fixed command substitution to run any exit trap defined in the command | |
5764 | substitution before returning; the exit trap is not inherited from the | |
5765 | calling shell. | |
5766 | ||
5767 | c. Fixes to process group synchronization code so that every child process | |
5768 | attempts to set the terminal's process group; fixes some synchronization | |
5769 | problems on Linux kernels that schedule the child to always run before | |
5770 | the parent. | |
5771 | ||
5772 | d. Fixed processing of octal and hex constants in printf builtin for POSIX.2 | |
5773 | compliance. | |
5774 | ||
5775 | e. Fixed a couple of core dumps in the pattern removal code. | |
5776 | ||
5777 | f. Fixes to the array subrange extraction code to deal better with sparse | |
5778 | arrays. | |
5779 | ||
5780 | g. Parser errors and other errors that result in the shell exiting now cause | |
5781 | the exit trap to be run. | |
5782 | ||
5783 | h. Change the command substitution completion functions to not append any | |
5784 | closing quote, because it would be inserted a closing "`" or ")". | |
5785 | ||
5786 | i. Fix history initialization so assignments to $histchars made in startup | |
5787 | files are honored. | |
5788 | ||
5789 | j. If an exit trap does not contain a call to `exit', the shell now uses | |
5790 | the exit status of the last command executed before the trap as the exit | |
5791 | status of the shell. | |
5792 | ||
5793 | k. The parser now prompts with $PS2 if it reads a newline while parsing a | |
5794 | compound array assignment statement. | |
5795 | ||
5796 | l. When performing a compound array assignment, the parser doesn't treat | |
5797 | words of the form [index]=value as assignments if they're the result of | |
5798 | expansions. | |
5799 | ||
5800 | m. Fixed a bug that caused `return' executed in a trap command to make the | |
5801 | shell think it was still running the trap. | |
5802 | ||
5803 | n. Fixed the value of errno set by the pathname canonicalization functions. | |
5804 | ||
5805 | o. Changed the grammar so that `time' alone on a line times a null command | |
5806 | rather than being a syntax error. | |
5807 | ||
95732b49 | 5808 | p. The pattern substitution code no longer performs quote removal on the |
b80f6443 JA |
5809 | pattern before trying to match it, as the pattern removal functions do. |
5810 | ||
5811 | q. Fixed a bug that could cause core dumps when checking whether a quoted | |
5812 | command name was being completed. | |
5813 | ||
5814 | r. Fixes to the pattern removal and pattern replacement expansions to deal | |
5815 | with multibyte characters better (and faster). | |
5816 | ||
5817 | s. Fix to the substring expansion (${param:off[:len]}) to deal with (possibly | |
5818 | multibyte) characters instead of raw bytes. | |
5819 | ||
5820 | t. Fixed a bug that caused some key bindings set in an inputrc to be ignored | |
5821 | at shell startup. | |
5822 | ||
5823 | u. Fixed a bug that caused unsetting a local variable within a function to | |
5824 | not work correctly. | |
5825 | ||
5826 | v. Fixed a bug that caused invalid variables to be created when using | |
5827 | `read -a'. | |
5828 | ||
5829 | w. Fixed a bug that caused "$@" to expand incorrectly when used as the right | |
5830 | hand side of a parameter expansion such as ${word:="$@"} if the first | |
5831 | character of $IFS was not a space. | |
5832 | ||
5833 | x. Fixed a slight cosmetic problem when printing commands containing a | |
5834 | `>&word' redirection. | |
5835 | ||
5836 | y. Fixed a problem that could cause here documents to not be created correctly | |
5837 | if the system temporary directory did not allow writing. | |
5838 | ||
5839 | 2. Changes to Readline | |
5840 | ||
5841 | a. Change to history expansion functions to treat `^' as equivalent to word | |
8868edaf | 5842 | one, as the documentation states. |
b80f6443 JA |
5843 | |
5844 | b. Some changes to the display code to improve display and redisplay of | |
5845 | multibyte characters. | |
5846 | ||
5847 | c. Changes to speed up the multibyte character redisplay code. | |
5848 | ||
5849 | d. Fixed a bug in the vi-mode `E' command that caused it to skip over the | |
5850 | last character of a word if invoked while point was on the word's | |
5851 | next-to-last character. | |
5852 | ||
5853 | e. Fixed a bug that could cause incorrect filename quoting when | |
5854 | case-insensitive completion was enabled and the word being completed | |
5855 | contained backslashes quoting word break characters. | |
5856 | ||
5857 | f. Fixed a bug in redisplay triggered when the prompt string contains | |
5858 | invisible characters. | |
5859 | ||
5860 | g. Fixed some display (and other) bugs encountered in multibyte locales | |
5861 | when a non-ascii character was the last character on a line. | |
5862 | ||
5863 | h. Fixed some display bugs caused by multibyte characters in prompt strings. | |
5864 | ||
5865 | i. Fixed a problem with history expansion caused by non-whitespace characters | |
5866 | used as history word delimiters. | |
5867 | ||
5868 | 3. New Features in Bash | |
5869 | ||
5870 | a. printf builtin understands two new escape sequences: \" and \?. | |
5871 | ||
5872 | b. `echo -e' understands two new escape sequences: \" and \?. | |
5873 | ||
5874 | c. The GNU `gettext' package and libintl have been integrated; the shell's | |
5875 | messages can be translated into different languages. | |
5876 | ||
5877 | d. The `\W' prompt expansion now abbreviates $HOME as `~', like `\w'. | |
5878 | ||
5879 | e. The error message printed when bash cannot open a shell script supplied | |
5880 | as argument 1 now includes the name of the shell, to better identify | |
5881 | the error as coming from bash. | |
5882 | ||
5883 | 4. New Features in Readline | |
5884 | ||
5885 | a. New application variable, rl_completion_quote_character, set to any | |
5886 | quote character readline finds before it calls the application completion | |
5887 | function. | |
5888 | ||
5889 | b. New application variable, rl_completion_suppress_quote, settable by an | |
5890 | application completion function. If set to non-zero, readline does not | |
5891 | attempt to append a closing quote to a completed word. | |
5892 | ||
5893 | c. New application variable, rl_completion_found_quote, set to a non-zero | |
5894 | value if readline determines that the word to be completed is quoted. | |
5895 | Set before readline calls any application completion function. | |
5896 | ||
5897 | d. New function hook, rl_completion_word_break_hook, called when readline | |
5898 | needs to break a line into words when completion is attempted. Allows | |
5899 | the word break characters to vary based on position in the line. | |
5900 | ||
5901 | e. New bindable command: unix-filename-rubout. Does the same thing as | |
5902 | unix-word-rubout, but adds `/' to the set of word delimiters. | |
5903 | ||
5904 | ------------------------------------------------------------------------------ | |
5905 | This document details the changes between this version, bash-3.0-alpha, | |
5906 | and the previous version, bash-2.05b-release. | |
5907 | ||
5908 | 1. Changes to Bash | |
5909 | ||
5910 | a. Fixes so that the shell will compile without some of the default options | |
5911 | defined. | |
5912 | ||
5913 | b. Fixed an error message that did not pass enough arguments to printf. | |
5914 | ||
5915 | c. Fixed a bug that caused input redirection to a builtin inside a script | |
5916 | being read from standard input to result in the rest of the already- | |
5917 | read and buffered script to be discarded. | |
5918 | ||
5919 | d. Fixed a bug that caused subshell initialization to close the file | |
5920 | descriptor from which the shell was reading a script under certain | |
5921 | circumstances. | |
5922 | ||
5923 | e. Fixed a bug that caused the shell to not advance a string pointer over | |
5924 | a null wide character when doing string operations. | |
5925 | ||
5926 | f. Fixed the internal logout code so that shells that time out waiting for | |
5927 | input (using $TMOUT) run ~/.bash_logout. | |
5928 | ||
5929 | g. Portability and configuration changes for: cygwin, HP/UX, GNU/FreeBSD. | |
5930 | ||
5931 | h. The parser no longer adds implicit double quotes to ((...)) arithmetic | |
5932 | commands. | |
5933 | ||
5934 | i. The ((...)) arithmetic command evaluation code was fixed to not dump core | |
5935 | when the expanded string is null. | |
5936 | ||
5937 | j. The ((...)) arithmetic command evaluation code was fixed to not perform | |
5938 | variable assignments while expanding the expression. | |
5939 | ||
5940 | k. Fixed a bug that caused word splitting to be performed incorrectly when | |
5941 | IFS is set, but null. | |
5942 | ||
5943 | l. Fixed a bug in brace expansion that caused a quoted `$' preceding an | |
5944 | open brace to inhibit brace expansion. | |
5945 | ||
5946 | m. Fixed a bug that caused a leading `-' in the shell's name to cause it to | |
5947 | not be recognized as a restricted shell. | |
5948 | ||
5949 | n. Fixed a bug in the arithmetic evaluation code that could cause longjmps | |
5950 | to an invalid location and result in a core dump. | |
5951 | ||
5952 | o. Fixed a bug in the calculation of how many history lines are new in a | |
5953 | single shell session when reading new history lines from a file with | |
5954 | `history -n'. | |
5955 | ||
5956 | p. Fixed a bug in pathname canonicalization that caused the shell to dump | |
5957 | core when presented with a pathname longer than PATH_MAX. | |
5958 | ||
5959 | q. Fixed the parser so that it doesn't try to compare a char variable to | |
5960 | EOF, which fails when chars are unsigned. | |
5961 | ||
5962 | r. Fixed a bug in the simple command execution code that caused occasional | |
5963 | core dumps. | |
5964 | ||
5965 | s. The shell does a better job of saving any partial parsing state during | |
5966 | operations which cause a command to be executed while a line is being | |
5967 | entered and parsed. | |
5968 | ||
5969 | t. The completion code now splits words more like the expansion code when | |
5970 | $IFS is used to split. | |
5971 | ||
5972 | u. The locale code does a better job of recomputing the various locale | |
5973 | variable values when LC_ALL is unset. | |
5974 | ||
5975 | v. The programmable completion code does a better job of dequoting expanded | |
5976 | word lists before comparing them against the word to be matched. | |
5977 | ||
5978 | w. The shell no longer seg faults if the expanded value of $PS4 is null | |
5979 | and `set -x' is enabled. | |
5980 | ||
5981 | x. Fixed a bug that caused core dumps when a here string expanded to NULL. | |
5982 | ||
5983 | y. The mail checking code now makes sure the mailbox is bigger before | |
5984 | reporting the existence of new mail. | |
5985 | ||
5986 | z. The parser does not try to expand $'...' and $"..." when the appear | |
5987 | within double quotes unless the `extquote' option has been enabled with | |
5988 | `shopt'. For backwards compatibility, it is enabled by default. | |
5989 | ||
5990 | aa. Fixed a bug that caused `for x; do ...' and `select x; do ... to use | |
5991 | $@ instead of "$@" for the implicit list of arguments. | |
5992 | ||
5993 | bb. Fixed a bug that caused a subshell of a restricted shell (e.g., one | |
5994 | spawned to execute a pipeline) to not exit immediately if attempting | |
5995 | to use a command containing a slash. | |
5996 | ||
5997 | cc. Fixed a problem with empty replacements for a pattern that doesn't match | |
5998 | when performing ${param/word/} expansion. | |
5999 | ||
6000 | dd. Word expansions performed while expanding redirections no longer search | |
6001 | a command's temporary environment to expand variable values. | |
6002 | ||
6003 | ee. Improvements to the alias expansion code when expanding subsequent words | |
6004 | because an aliase's value ends with a space. | |
6005 | ||
6006 | ff. `cd -' now prints the current working directory after a successful chdir | |
6007 | even when the shell is not interactive, as the standard requires. | |
6008 | ||
6009 | gg. The shell does a better job of ensuring a child process dies of SIGINT | |
6010 | before resending SIGINT to itself. | |
6011 | ||
6012 | hh. The arithmetic expansion variable assignment code now does the right | |
6013 | thing when assigning to `special' variables like OPTIND. | |
6014 | ||
6015 | ii. When history expansion verification is enabled, the bash readline helper | |
6016 | functions that do history expansion on the current line don't print | |
6017 | the results. | |
6018 | ||
6019 | jj. Fixed bugs with multiple consecutive alias expansion when one of the | |
6020 | expansions ends with a space. | |
6021 | ||
6022 | kk. Fixed a problem in the programmable completion code that could cause core | |
6023 | dumps when trying to initialize a set of possible completions from a | |
6024 | list of variables. | |
6025 | ||
6026 | ll. The \[ and \] escape characters are now ignored when decoding the prompt | |
6027 | string if the shell is started with editing disabled. | |
6028 | ||
6029 | mm. Fixed a bug that could leave extra characters in a string when doing | |
6030 | quoted null character removal. | |
6031 | ||
6032 | nn. Command substitution and other subshell operations no longer reset the | |
6033 | line number (aids the bash debugger). | |
6034 | ||
6035 | oo. Better line number management when executing simple commands, conditional | |
6036 | commands, for commands, and select commands. | |
6037 | ||
6038 | pp. The globbing code now uses malloc, with its better failure properties, | |
6039 | rather than alloca(). | |
6040 | ||
6041 | qq. Fixed a bug that caused expansions like #{a[2]:=value} to create the | |
6042 | appropriate array element instead of a variable named `a[2]'. | |
6043 | ||
6044 | rr. Fixed a bug in the handling of a `?(...)' pattern immediately following | |
6045 | a `*' when extglob is enabled. | |
6046 | ||
6047 | ss. Fixed a bug that caused a `return' invoked in an exit trap when exit is | |
6048 | invoked in a function to misbehave. | |
6049 | ||
6050 | tt. Fixed a bug that caused CTLESC and CTLNUL characters to not be escaped | |
6051 | by the internal shell string quoting functions. | |
6052 | ||
6053 | uu. Fixed a bug that caused quoted null characters in an expanded word list | |
6054 | to be inappropriately assigned to an array variable when using `read -a'. | |
6055 | ||
6056 | vv. Fixed a bug that caused redirections accompanying a null command to persist | |
6057 | in the current shell. | |
6058 | ||
6059 | ww. Fixed a bug that caused the prompt to be printed when the shell was | |
6060 | expanding a multiline alias. | |
6061 | ||
6062 | xx. Fixed a bug that resulted in core dumps when the completion for a command | |
6063 | changed the compspec. | |
6064 | ||
6065 | yy. Fixed a bug that caused evaluation of programmable completions to print | |
6066 | notifications of completed jobs. | |
6067 | ||
6068 | zz. Bash now disables line editing when $EMACS == `t' and $TERM == `dumb' | |
6069 | (which is what emacs shell windows do). | |
6070 | ||
6071 | aaa. In posix mode, `kill -l' causes signal names to be displayed without | |
6072 | a leading `SIG'. | |
6073 | ||
6074 | bbb. Clear error flag on standard output so it doesn't persist across multiple | |
6075 | builtin commands. | |
6076 | ||
6077 | ccc. In posix mode, `alias' displays alias values without the leading `alias', | |
6078 | so the output cannot be used as subsequent input. | |
6079 | ||
6080 | ddd. In posix mode, the `trap' builtin doesn't check whether or not its | |
6081 | first argument is a signal specification and revert the signal handling | |
6082 | to its original disposition if it is. | |
6083 | ||
6084 | eee. Fixed several bugs in the handling of "$*" and "${array[*]}" by the | |
6085 | pattern substitution and removal expansions. | |
6086 | ||
6087 | fff. Fixed several problems with the handling of ${array[@]}, ${array[*]}, | |
6088 | $@, and $* by the indirect variable expansion code. | |
6089 | ||
6090 | ggg. Fixed a bug that did not allow `time' to be aliased. | |
6091 | ||
6092 | hhh. Improved the mail checking code so it won't check (and possibly cause an | |
6093 | NFS file system mount) until MAILPATH or MAIL is given a value -- there | |
6094 | is no default if DEFAULT_MAIL_DIRECTORY is not defined at compile time. | |
6095 | (It is computed by configure, but can be #undef'd in config-bot.h.) | |
6096 | ||
6097 | iii. If the `chkwinsize' option is enabled, the shell checks for window size | |
6098 | changes if a child process exits due to a signal. | |
6099 | ||
6100 | jjj. Removed the attempts to avoid adding a slash at the end of a completed | |
6101 | executable name if there was a directory with the same name in the | |
6102 | current directory. | |
6103 | ||
6104 | kkk. Fixed PATH lookup code so it treats the permission bits separately for | |
6105 | owner, group, and other, rather than checking them all. | |
6106 | ||
6107 | lll. Fixed the locale code to reset the parser's idea of the character class | |
6108 | <blank>, which controls how it splits tokens, when the locale changes. | |
6109 | ||
6110 | mmm. The shell now binds its special readline functions and key bindings only | |
6111 | if the user's inputrc file has not already bound them. | |
6112 | ||
6113 | nnn. The shell now reports on processes that dump core due to signals when | |
6114 | invoked as `-c command'. | |
6115 | ||
6116 | 2. Changes to Readline | |
6117 | ||
6118 | a. Fixes to avoid core dumps because of null pointer references in the | |
6119 | multibyte character code. | |
6120 | ||
6121 | b. Fix to avoid infinite recursion caused by certain key combinations. | |
6122 | ||
6123 | c. Fixed a bug that caused the vi-mode `last command' to be set incorrectly. | |
6124 | ||
6125 | d. Readline no longer tries to read ahead more than one line of input, even | |
6126 | when more is available. | |
6127 | ||
6128 | e. Fixed the code that adjusts the point to not mishandle null wide | |
6129 | characters. | |
6130 | ||
6131 | f. Fixed a bug in the history expansion `g' modifier that caused it to skip | |
6132 | every other match. | |
6133 | ||
6134 | g. Fixed a bug that caused the prompt to overwrite previous output when the | |
6135 | output doesn't contain a newline and the locale supports multibyte | |
6136 | characters. This same change fixes the problem of readline redisplay | |
6137 | slowing down dramatically as the line gets longer in multibyte locales. | |
6138 | ||
6139 | h. History traversal with arrow keys in vi insertion mode causes the cursor | |
6140 | to be placed at the end of the new line, like in emacs mode. | |
6141 | ||
6142 | i. The locale initialization code does a better job of using the right | |
6143 | precedence and defaulting when checking the appropriate environment | |
6144 | variables. | |
6145 | ||
6146 | j. Fixed the history word tokenizer to handle <( and >( better when used as | |
6147 | part of bash. | |
6148 | ||
6149 | k. The overwrite mode code received several bug fixes to improve undo. | |
6150 | ||
6151 | l. Many speedups to the multibyte character redisplay code. | |
6152 | ||
6153 | m. The callback character reading interface should not hang waiting to read | |
6154 | keyboard input. | |
6155 | ||
6156 | n. Fixed a bug with redoing vi-mode `s' command. | |
6157 | ||
6158 | o. The code that initializes the terminal tracks changes made to the terminal | |
6159 | special characters with stty(1) (or equivalent), so that these changes | |
6160 | are reflected in the readline bindings. New application-callable function | |
6161 | to make it work: rl_tty_unset_default_bindings(). | |
6162 | ||
6163 | p. Fixed a bug that could cause garbage to be inserted in the buffer when | |
6164 | changing character case in vi mode when using a multibyte locale. | |
6165 | ||
6166 | q. Fixed a bug in the redisplay code that caused problems on systems | |
6167 | supporting multibyte characters when moving between history lines when the | |
6168 | new line has more glyphs but fewer bytes. | |
6169 | ||
6170 | r. Undo and redo now work better after exiting vi insertion mode. | |
6171 | ||
6172 | s. Make sure system calls are restarted after a SIGWINCH is received using | |
6173 | SA_RESTART. | |
6174 | ||
6175 | t. Improvements to the code that displays possible completions when using | |
6176 | multibyte characters. | |
6177 | ||
6178 | u. Fixed a problem when parsing nested if statements in inputrc files. | |
6179 | ||
6180 | v. The completer now takes multibyte characters into account when looking for | |
6181 | quoted substrings on which to perform completion. | |
6182 | ||
6183 | w. The history search functions now perform better bounds checking on the | |
6184 | history list. | |
6185 | ||
6186 | 3. New Features in Bash | |
6187 | ||
6188 | a. ANSI string expansion now implements the \x{hexdigits} escape. | |
6189 | ||
6190 | b. There is a new loadable `strftime' builtin. | |
6191 | ||
6192 | c. New variable, COMP_WORDBREAKS, which controls the readline completer's | |
6193 | idea of word break characters. | |
6194 | ||
6195 | d. The `type' builtin no longer reports on aliases unless alias expansion | |
6196 | will actually be performed. | |
6197 | ||
6198 | e. HISTCONTROL is now a colon-separated list of values, which permits | |
6199 | more extensibility and backwards compatibility. | |
6200 | ||
6201 | f. HISTCONTROL may now include the `erasedups' option, which causes all lines | |
6202 | matching a line being added to be removed from the history list. | |
6203 | ||
6204 | g. `configure' has a new `--enable-multibyte' argument that permits multibyte | |
6205 | character support to be disabled even on systems that support it. | |
6206 | ||
6207 | h. New variables to support the bash debugger: BASH_ARGC, BASH_ARGV, | |
6208 | BASH_SOURCE, BASH_LINENO, BASH_SUBSHELL, BASH_EXECUTION_STRING, | |
6209 | BASH_COMMAND | |
6210 | ||
6211 | i. FUNCNAME has been changed to support the debugger: it's now an array | |
6212 | variable. | |
6213 | ||
6214 | j. for, case, select, arithmetic commands now keep line number information | |
6215 | for the debugger. | |
6216 | ||
6217 | k. There is a new `RETURN' trap executed when a function or sourced script | |
6218 | returns (not inherited child processes; inherited by command substitution | |
6219 | if function tracing is enabled and the debugger is active). | |
6220 | ||
6221 | l. New invocation option: --debugger. Enables debugging and turns on new | |
6222 | `extdebug' shell option. | |
6223 | ||
6224 | m. New `functrace' and `errtrace' options to `set -o' cause DEBUG and ERR | |
6225 | traps, respectively, to be inherited by shell functions. Equivalent to | |
6226 | `set -T' and `set -E' respectively. The `functrace' option also controls | |
6227 | whether or not the DEBUG trap is inherited by sourced scripts. | |
6228 | ||
6229 | n. The DEBUG trap is run before binding the variable and running the action | |
6230 | list in a `for' command, binding the selection variable and running the | |
6231 | query in a `select' command, and before attempting a match in a `case' | |
6232 | command. | |
6233 | ||
6234 | o. New `--enable-debugger' option to `configure' to compile in the debugger | |
6235 | support code. | |
6236 | ||
6237 | p. `declare -F' now prints out extra line number and source file information | |
6238 | if the `extdebug' option is set. | |
6239 | ||
6240 | q. If `extdebug' is enabled, a non-zero return value from a DEBUG trap causes | |
6241 | the next command to be skipped, and a return value of 2 while in a | |
6242 | function or sourced script forces a `return'. | |
6243 | ||
6244 | r. New `caller' builtin to provide a call stack for the bash debugger. | |
6245 | ||
6246 | s. The DEBUG trap is run just before the first command in a function body is | |
6247 | executed, for the debugger. | |
6248 | ||
6249 | t. `for', `select', and `case' command heads are printed when `set -x' is | |
6250 | enabled. | |
6251 | ||
6252 | u. There is a new {x..y} brace expansion, which is shorthand for {x.x+1, | |
6253 | x+2,...,y}. x and y can be integers or single characters; the sequence | |
6254 | may ascend or descend; the increment is always 1. | |
6255 | ||
6256 | v. New ksh93-like ${!array[@]} expansion, expands to all the keys (indices) | |
6257 | of array. | |
6258 | ||
6259 | w. New `force_fignore' shopt option; if enabled, suffixes specified by | |
6260 | FIGNORE cause words to be ignored when performing word completion even | |
6261 | if they're the only possibilities. | |
6262 | ||
6263 | x. New `gnu_errfmt' shopt option; if enabled, error messages follow the `gnu | |
6264 | style' (filename:lineno:message) format. | |
6265 | ||
6266 | y. New `-o bashdefault' option to complete and compgen; if set, causes the | |
6267 | whole set of bash completions to be performed if the compspec doesn't | |
6268 | result in a match. | |
6269 | ||
6270 | z. New `-o plusdirs' option to complete and compgen; if set, causes directory | |
6271 | name completion to be performed and the results added to the rest of the | |
6272 | possible completions. | |
6273 | ||
6274 | aa. `kill' is available as a builtin even when the shell is built without | |
6275 | job control. | |
6276 | ||
6277 | bb. New HISTTIMEFORMAT variable; value is a format string to pass to | |
6278 | strftime(3). If set and not null, the `history' builtin prints out | |
6279 | timestamp information according to the specified format when displaying | |
6280 | history entries. If set, bash tells the history library to write out | |
6281 | timestamp information when the history file is written. | |
6282 | ||
6283 | cc. The [[ ... ]] command has a new binary `=~' operator that performs | |
6284 | extended regular expression (egrep-like) matching. | |
6285 | ||
6286 | dd. `configure' has a new `--enable-cond-regexp' option (enabled by default) | |
6287 | to enable the =~ operator and regexp matching in [[ ... ]]. | |
6288 | ||
6289 | ee. Subexpressions matched by the =~ operator are placed in the new | |
6290 | BASH_REMATCH array variable. | |
6291 | ||
6292 | ff. New `failglob' option that causes an expansion error when pathname | |
6293 | expansion fails to produce a match. | |
6294 | ||
6295 | gg. New `set -o pipefail' option that causes a pipeline to return a failure | |
6296 | status if any of the processes in the pipeline fail, not just the last | |
6297 | one. | |
6298 | ||
6299 | 4. New Features in Readline | |
6300 | ||
6301 | a. History expansion has a new `a' modifier equivalent to the `g' modifier | |
6302 | for compatibility with the BSD csh. | |
6303 | ||
6304 | b. History expansion has a new `G' modifier equivalent to the BSD csh `g' | |
6305 | modifier, which performs a substitution once per word. | |
6306 | ||
6307 | c. All non-incremental search operations may now undo the operation of | |
6308 | replacing the current line with the history line. | |
6309 | ||
6310 | d. The text inserted by an `a' command in vi mode can be reinserted with | |
6311 | `.'. | |
6312 | ||
6313 | e. New bindable variable, `show-all-if-unmodified'. If set, the readline | |
6314 | completer will list possible completions immediately if there is more | |
6315 | than one completion and partial completion cannot be performed. | |
6316 | ||
6317 | f. There is a new application-callable `free_history_entry()' function. | |
6318 | ||
6319 | g. History list entries now contain timestamp information; the history file | |
6320 | functions know how to read and write timestamp information associated | |
6321 | with each entry. | |
6322 | ||
6323 | h. Four new key binding functions have been added: | |
6324 | ||
6325 | rl_bind_key_if_unbound() | |
6326 | rl_bind_key_if_unbound_in_map() | |
6327 | rl_bind_keyseq_if_unbound() | |
6328 | rl_bind_keyseq_if_unbound_in_map() | |
6329 | ||
6330 | ------------------------------------------------------------------------------ | |
7117c2d2 JA |
6331 | This document details the changes between this version, bash-2.05b-release, |
6332 | and the previous version, bash-2.05b-beta2. | |
6333 | ||
6334 | 1. Changes to Bash | |
6335 | ||
6336 | a. Fixed an off-by-one error in the function that translates job | |
6337 | specifications. | |
6338 | ||
6339 | b. Note that we're running under Emacs and disable line editing if | |
6340 | $EMACS == `t'. | |
6341 | ||
6342 | ------------------------------------------------------------------------------ | |
6343 | This document details the changes between this version, bash-2.05b-beta2, | |
6344 | and the previous version, bash-2.05b-beta1. | |
6345 | ||
6346 | 1. Changes to Bash | |
6347 | ||
6348 | a. Fixed the /= and %= arithmetic operators to catch division by zero. | |
6349 | ||
6350 | b. Added putenv, setenv, unsetenv to getenv replacement for completeness. | |
6351 | ||
6352 | c. Fixed a bug that could cause the -O expand_aliases invocation option | |
6353 | to not take effect. | |
6354 | ||
6355 | d. Fixed a problem with process substitution that resulted in incorrect | |
6356 | behavior when the number of process substitutions in an individual | |
6357 | command approached 64. | |
6358 | ||
6359 | 2. Changes to Readline | |
6360 | ||
6361 | a. Fixed a problem with backward-char-search when on a system with support | |
6362 | for multibyte characters when running in a locale without any multibyte | |
6363 | characters. | |
6364 | ||
6365 | ------------------------------------------------------------------------------ | |
6366 | This document details the changes between this version, bash-2.05b-beta1, | |
6367 | and the previous version, bash-2.05b-alpha1. | |
6368 | ||
6369 | 1. Changes to Bash | |
6370 | ||
6371 | a. Fixed a problem when parsing a POSIX.2 character class name while | |
6372 | evaluating a bracket expression containing multibyte characters. | |
6373 | ||
6374 | b. Changed the help text for `bind' to make it clear that any command | |
6375 | that may be placed in ~/.inputrc is a valid argument to `bind'. | |
6376 | ||
6377 | c. Added `help' builtin entries for `((', `[[', and arithmetic for. | |
6378 | ||
6379 | d. malloc updated again: | |
6380 | o slightly better overflow and underflow detection by putting the | |
6381 | chunk size at the beginning and end of the chunk and making | |
6382 | sure they match in free/realloc | |
6383 | o partial page allocated to make things page-aligned no longer | |
6384 | completely wasted | |
6385 | o block coalescing now enabled by default | |
6386 | o splitting and coalescing enabled for 32-byte chunks, the most | |
6387 | common size requested | |
6388 | o fixed a problem that resulted in spurious underflow messages and | |
6389 | aborts | |
6390 | o bin sizes are precomputed and stored in an array rather than | |
6391 | being computed at run time | |
6392 | o malloc will return memory blocks back to the system if the block | |
6393 | being freed is at the top of the heap and of sufficient size to | |
6394 | make it worthwhile | |
6395 | o malloc/free/realloc now inline memset instead of calling the | |
6396 | libc function; uses Duff's device for good performance | |
6397 | ||
6398 | e. Check for getservent(); make the service name completion code dependent | |
6399 | on its presence. | |
6400 | ||
6401 | f. Changed the readline callback that executes a command bound to a key | |
6402 | sequence to not save the executed command on the history list and to | |
6403 | save and restore the parsing state. | |
6404 | ||
6405 | g. Changes to lib/sh/snprintf.c: fixed some bugs in the `g' and `G' | |
6406 | floating point format display; implemented the "'" flag character | |
6407 | that turns on thousands' grouping; fixed behavior on systems where | |
6408 | MB_CUR_MAX does not evaluate to a constant. | |
6409 | ||
6410 | h. The `unset' builtin no longer returns a failure status when asked to | |
6411 | unset a previously-unset variable or function. | |
6412 | ||
6413 | i. Changes to the build system to make it easier to cross-compile bash | |
6414 | for different systems. | |
6415 | ||
6416 | j. Added `,' to the characters that are backslash-escaped during filename | |
6417 | completion, to avoid problems with complete-into-braces and RCS filenames | |
6418 | containing commas. | |
6419 | ||
6420 | k. Some changes to the multibyte character support code to avoid many calls | |
6421 | to strlen(). | |
6422 | ||
6423 | l. Bash now correctly honors setting LANG to some value when LC_ALL does not | |
6424 | already have a value. | |
6425 | ||
6426 | m. Fixed a bug that could cause SIGSEGV when processing nested traps with | |
6427 | trap handlers. | |
6428 | ||
6429 | n. The `source/.' builtin now restores the positional parameters when it | |
6430 | returns unless they were changed using the `set' builtin during the file's | |
6431 | execution. | |
6432 | ||
6433 | o. Fixed a bug that caused a syntax error when a command was terminated by | |
6434 | EOF. | |
6435 | ||
6436 | 2. New Features in Bash | |
6437 | ||
6438 | a. There is now support for placing the long help text into separate files | |
6439 | installed into ${datadir}/bash. Not enabled by default; can be turned | |
6440 | on with `--enable-separate-helpfiles' option to configure. | |
6441 | ||
6442 | b. All builtins that take operands accept a `--' pseudo-option, except | |
6443 | `echo'. | |
6444 | ||
6445 | c. The `echo' builtin now accepts \0xxx (zero to three octal digits following | |
6446 | the `0') in addition to \xxx (one to three octal digits) for SUSv3/XPG6/ | |
6447 | POSIX.1-2001 compliance. | |
6448 | ||
6449 | 3. Changes to Readline | |
6450 | ||
6451 | a. Fixed a small problem in _rl_insert_char with multibyte characters. | |
6452 | ||
6453 | b. Fixes from IBM for line wrapping problems when using multibyte characters. | |
6454 | ||
6455 | c. Fixed a problem which caused the display to be messed up when the last | |
6456 | line of a multi-line prompt (possibly containing invisible characters) | |
6457 | was longer than the screen width. | |
6458 | ||
8868edaf | 6459 | d. Fixed a problem with the vi-mode `r' command that occurred on systems with |
7117c2d2 JA |
6460 | support for multibyte characters when running in a locale without any |
6461 | multibyte characters. | |
6462 | ||
6463 | ------------------------------------------------------------------------------ | |
6464 | This document details the changes between this version, bash-2.05b-alpha1, | |
6465 | and the previous version, bash-2.05a-release. | |
6466 | ||
6467 | 1. Changes to Bash | |
6468 | ||
6469 | a. Some changes to work around inlining differences between compilers. | |
6470 | ||
6471 | b. Added more prototypes for internal shell typedefs, to catch argument | |
6472 | passing errors when using pointers to functions. | |
6473 | ||
6474 | c. The `cd' builtin now fails in posix mode when a valid directory cannot be | |
6475 | constructed from a relative pathname argument and the $PWD using pathname | |
6476 | canonicalization, and the -P option has not been supplied. Previously, | |
6477 | the shell would attempt to use what the user typed, leading to weird | |
6478 | values for $PWD and discrepancies between the value of $PWD and the | |
6479 | actual working directory. | |
6480 | ||
6481 | d. The `cd' builtin now resets $PWD when canonicalization fails but a chdir | |
6482 | to the pathname passed as an argument succeeds (when not in posix mode). | |
6483 | ||
6484 | e. The `fc' builtin has been fixed, as POSIX requires, to use the closest | |
6485 | history position in range when given an out-of-range argument. | |
6486 | ||
6487 | f. The history file loading code was changed to allow lines to be saved in | |
6488 | the history list from the shell startup files. | |
6489 | ||
b80f6443 | 6490 | g. `history -s args' now works better in compound commands. |
7117c2d2 JA |
6491 | |
6492 | h. The tilde expansion code was fixed to better recognize when it's being | |
6493 | invoked in an assignment context, which enables expansion after `=' | |
6494 | and `:'. | |
6495 | ||
6496 | i. Fixed the command name completion code so a slash is no longer appended | |
6497 | to a single match if there happens to be a directory with that name in | |
6498 | $PWD. | |
6499 | ||
6500 | j. Fixed compound array assignment to no longer perform alias expansion, to | |
6501 | allow reserved words as array members, and to not produce extra output | |
6502 | when the `-v' option had been enabled. | |
6503 | ||
6504 | k. Fixed the programmable completion code to better handle newlines in lists | |
6505 | of possible completions (e.g., `complete -W'). | |
6506 | ||
6507 | l. Removed the reserved words from the `bash-builtins' manual page. | |
6508 | ||
6509 | m. Parser error reporting now attempts to do a better job of identifying the | |
6510 | token in error rather than doing straight textual analysis. | |
6511 | ||
6512 | n. Fixes for Inf/NaN, locales, wide/multibyte characters and zero-length | |
6513 | arguments in the library snprintf(3) replacement. | |
6514 | ||
6515 | o. `read -e' no longer does command name completion on the first word on | |
6516 | the line being read. | |
6517 | ||
6518 | p. `select' now returns failure if the read of the user's selection fails. | |
6519 | ||
6520 | q. Fixed a bug that could cause a core dump when setting $PIPESTATUS. | |
6521 | ||
6522 | r. Fixes to not allocate so many job slots when the shell is running a loop | |
6523 | with job control enabled in a subshell of an interactive shell. | |
6524 | ||
6525 | s. Fixed a bug in the trap code that caused traps to be inherited by | |
6526 | command substitutions in some cases. | |
6527 | ||
6528 | t. Fixed a bug that could cause alias expansion to inappropriately expand | |
6529 | the word following the alias. | |
6530 | ||
6531 | u. Fixed a bug in the `kill' builtin that mishandled negative pid arguments. | |
6532 | ||
6533 | v. The parser is less lenient when parsing assignment statements where the | |
6534 | characters before the `=' don't comprise a valid identifier. | |
6535 | ||
6536 | w. The arithmetic expression evaluation code now honors the setting of the | |
6537 | `-u' option when expanding variable names. | |
6538 | ||
6539 | x. Fixed the arithmetic evaluation code to allow array subscripts to be | |
6540 | assigned (`let b[7]=42') and auto-incremented and auto-decremented | |
6541 | (e.g., b[7]++). | |
6542 | ||
6543 | y. Reimplemented the existing prompt string date and time expansions using | |
6544 | strftime(3), which changed the output of \@ in some locales. | |
6545 | ||
6546 | z. Fixed a bug that could cause a core dump when a special shell variable | |
6547 | (like RANDOM) was converted to an array with a variable assignment. | |
6548 | ||
6549 | aa. Fixed a bug that would reset the handler for a signal the user had | |
6550 | trapped to a function that would exit the shell when setting the exit | |
6551 | trap in a non-interactive shell. | |
6552 | ||
6553 | bb. Changed the execve(2) wrapper code to check whether or not a failing | |
6554 | command is a directory before looking at whether a `#!' interpreter | |
6555 | failed for some reason. | |
6556 | ||
6557 | cc. Fixed a bug in the command printing code so it no longer inserts a `;' | |
6558 | after a newline, which produces a syntax error when reused as input. | |
6559 | ||
6560 | dd. The code that expands $PS4 no longer inherits the `-x' flag. | |
6561 | ||
6562 | ee. The bash-specific completion functions may now take advantage of the | |
6563 | double-TAB and M-? features of the standard readline completion | |
6564 | functions. | |
6565 | ||
6566 | ff. The mail checking code no longer prints a message if the checked file's | |
6567 | size has not increased, even if the access time is less than the modification time. | |
6568 | ||
6569 | gg. Rewrote the variable symbol table code: there is now a stack of | |
6570 | contexts, each possibly including a separate symbol table; there can | |
6571 | be more than one temporary environment supplied to nested invocations | |
6572 | of `./source'; the temporary environments no longer require so much | |
6573 | special-case code; shell functions now handle the temporary environment | |
6574 | and local variables more consistently; function scope exit is faster now | |
6575 | that the entire symbol table does not have to be traversed to dispose of | |
6576 | local variables; it is now easier to push vars from the temporary | |
6577 | environment to the shell's variable table in posix mode; some duplicated | |
6578 | code has been removed. | |
6579 | ||
6580 | hh. Regularized the error message printing code; builtin_error is now called | |
6581 | more consistently, and common error message strings are handled by small | |
6582 | functions. This should make eventual message translation easier. | |
6583 | ||
6584 | ii. Error messages now include the line number in a script when the shell | |
6585 | is not interactive. | |
6586 | ||
6587 | jj. Array subscript expansion now takes place even when the array variable is | |
6588 | unset, so side effects will take place. | |
6589 | ||
6590 | kk. Fixed a bug in the SICGHLD child-reaping code so that it won't find | |
6591 | jobs already marked as terminated if the OS reuses pids quickly enough. | |
6592 | ||
6593 | ll. Fixed a bug that could cause a signal to not interrupt the `wait' | |
6594 | builtin while it was waiting for a background process to terminate. | |
6595 | ||
6596 | mm. A couple of changes to make it easier for multiple shells to share history | |
6597 | files using `history -n', `history -r', and `history -w'. | |
6598 | ||
6599 | nn. The `getopts' builtin always increments OPTIND to point to the next | |
6600 | option to be handled when an option is returned, whether it's valid | |
6601 | or not, as POSIX 1003.x-2001 requires. | |
6602 | ||
6603 | oo. Changed some parts of the expansion code to avoid allocating and | |
6604 | immediately freeing memory without using the results for anything. | |
6605 | ||
6606 | pp. The shell now keeps track of $IFS internally, updating its internal map | |
6607 | each time the variable is assigned a new value (or at local scope exit). | |
6608 | This saves thousands of hash lookups for IFS, which, while individually | |
6609 | cheap, add up. | |
6610 | ||
6611 | qq. Rewrote the hash table code: searching and insertion are much faster now, | |
6612 | and it uses a better string hashing function; augmented the function | |
6613 | interface to simplify other parts of the code and remove duplicated code | |
6614 | ||
6615 | rr. The shell now uses a simple, generic `object cache' for allocating and | |
6616 | caching words and word lists, which were the major users of | |
6617 | malloc/free. | |
6618 | ||
6619 | ss. Fixed the assignment statement parsing code to allow whitespace and | |
6620 | newlines in subscripts when performing array element assignment. | |
6621 | ||
6622 | tt. The shell now issues many fewer calls to sigprocmask and other signal | |
6623 | masking system calls. | |
6624 | ||
6625 | uu. Fixed the `test' and conditional command file comparison operators to | |
6626 | work right when one file has a non-positive timestamp and the other | |
6627 | does not exist. | |
6628 | ||
6629 | vv. Fixed some cases where the special characters '\001' and '\177' in the | |
6630 | values of variables or positional parameters caused incorrect expansion | |
6631 | results. | |
6632 | ||
6633 | 2. Changes to Readline | |
6634 | ||
6635 | a. Fixed output of comment-begin character when listing variable values. | |
6636 | ||
6637 | b. Added some default key bindings for common escape sequences produced by | |
6638 | HOME and END keys. | |
6639 | ||
6640 | c. Fixed the mark handling code to be more emacs-compatible. | |
6641 | ||
6642 | d. A bug was fixed in the code that prints possible completions to keep it | |
6643 | from printing empty strings in certain circumstances. | |
6644 | ||
6645 | e. Change the key sequence printing code to print ESC as M\- if ESC is a | |
6646 | meta-prefix character -- it's easier for users to understand than \e. | |
6647 | ||
6648 | f. Fixed unstifle_history() to return values that match the documentation. | |
6649 | ||
6650 | g. Fixed the event loop (rl_event_hook) to handle the case where the input | |
6651 | file descriptor is invalidated. | |
6652 | ||
6653 | h. Fixed the prompt display code to work better when the application has a | |
6654 | custom redisplay function. | |
6655 | ||
6656 | i. Changes to make reading and writing the history file a little faster, and | |
6657 | to cope with huge history files without calling abort(3) from xmalloc. | |
6658 | ||
6659 | j. The vi-mode `S' and `s' commands are now undone correctly. | |
6660 | ||
6661 | 3. New Features in Bash | |
6662 | ||
6663 | a. If set, TMOUT is the default timeout for the `read' builtin. | |
6664 | ||
6665 | b. `type' has two new options: `-f' suppresses shell function lookup, and | |
6666 | `-P' forces a $PATH search. | |
6667 | ||
6668 | c. New code to handle multibyte characters. | |
6669 | ||
6670 | d. `select' was changed to be more ksh-compatible, in that the menu is | |
6671 | reprinted each time through the loop only if REPLY is set to NULL. | |
6672 | The previous behavior is available as a compile-time option. | |
6673 | ||
6674 | e. `complete -d' and `complete -o dirnames' now force a slash to be | |
6675 | appended to names which are symlinks to directories. | |
6676 | ||
6677 | f. There is now a bindable edit-and-execute-command readline command, | |
6678 | like the vi-mode `v' command, bound to C-xC-e in emacs mode. | |
6679 | ||
6680 | g. Added support for ksh93-like [:word:] character class in pattern matching. | |
6681 | ||
6682 | h. The $'...' quoting construct now expands \cX to Control-X. | |
6683 | ||
6684 | i. A new \D{...} prompt expansion; passes the `...' to strftime and inserts | |
6685 | the result into the expanded prompt. | |
6686 | ||
6687 | j. The shell now performs arithmetic in the largest integer size the | |
6688 | machine supports (intmax_t), instead of long. | |
6689 | ||
6690 | k. If a numeric argument is supplied to one of the bash globbing completion | |
6691 | functions, a `*' is appended to the word before expansion is attempted. | |
6692 | ||
6693 | l. The bash globbing completion functions now allow completions to be listed | |
6694 | with double tabs or if `show-all-if-ambiguous' is set. | |
6695 | ||
6696 | m. New `-o nospace' option for `complete' and `compgen' builtins; suppresses | |
6697 | readline's appending a space to the completed word. | |
6698 | ||
6699 | n. New `here-string' redirection operator: <<< word. | |
6700 | ||
6701 | o. When displaying variables, function attributes and definitions are shown | |
6702 | separately, allowing them to be re-used as input (attempting to re-use | |
6703 | the old output would result in syntax errors). | |
6704 | ||
6705 | p. There is a new configuration option `--enable-mem-scramble', controls | |
6706 | bash malloc behavior of writing garbage characters into memory at | |
6707 | allocation and free time. | |
6708 | ||
6709 | q. The `complete' and `compgen' builtins now have a new `-s/-A service' | |
6710 | option to complete on names from /etc/services. | |
6711 | ||
6712 | r. `read' has a new `-u fd' option to read from a specified file descriptor. | |
6713 | ||
6714 | s. Fix the completion code so that expansion errors in a directory name | |
6715 | don't cause a longjmp back to the command loop. | |
6716 | ||
6717 | t. Fixed word completion inside command substitution to work a little more | |
6718 | intuitively. | |
6719 | ||
6720 | u. The `printf' %q format specifier now uses $'...' quoting to print the | |
6721 | argument if it contains non-printing characters. | |
6722 | ||
6723 | v. The `declare' and `typeset' builtins have a new `-t' option. When applied | |
6724 | to functions, it causes the DEBUG trap to be inherited by the named | |
6725 | function. Currently has no effect on variables. | |
6726 | ||
6727 | w. The DEBUG trap is now run *before* simple commands, ((...)) commands, | |
6728 | [[...]] conditional commands, and for ((...)) loops. | |
6729 | ||
6730 | x. The expansion of $LINENO inside a shell function is only relative to the | |
6731 | function start if the shell is interactive -- if the shell is running a | |
6732 | script, $LINENO expands to the line number in the script. This is as | |
6733 | POSIX-2001 requires. | |
6734 | ||
6735 | y. The bash debugger in examples/bashdb has been modified to work with the | |
6736 | new DEBUG trap semantics, the command set has been made more gdb-like, | |
6737 | and the changes to $LINENO make debugging functions work better. Code | |
6738 | from Gary Vaughan. | |
6739 | ||
6740 | z. New [n]<&word- and [n]>&word- redirections from ksh93 -- move fds (dup | |
6741 | and close). | |
6742 | ||
6743 | aa. There is a new `-l' invocation option, equivalent to `--login'. | |
6744 | ||
6745 | bb. The `hash' builtin has a new `-l' option to list contents in a reusable | |
6746 | format, and a `-d' option to remove a name from the hash table. | |
6747 | ||
6748 | 4. New Features in Readline | |
6749 | ||
6750 | a. Support for key `subsequences': allows, e.g., ESC and ESC-a to both | |
6751 | be bound to readline functions. Now the arrow keys may be used in vi | |
6752 | insert mode. | |
6753 | ||
6754 | b. When listing completions, and the number of lines displayed is more than | |
6755 | the screen length, readline uses an internal pager to display the results. | |
6756 | This is controlled by the `page-completions' variable (default on). | |
6757 | ||
6758 | c. New code to handle editing and displaying multibyte characters. | |
6759 | ||
6760 | d. The behavior introduced in bash-2.05a of deciding whether or not to | |
6761 | append a slash to a completed name that is a symlink to a directory has | |
6762 | been made optional, controlled by the `mark-symlinked-directories' | |
6763 | variable (default is the 2.05a behavior). | |
6764 | ||
6765 | e. The `insert-comment' command now acts as a toggle if given a numeric | |
6766 | argument: if the first characters on the line don't specify a | |
6767 | comment, insert one; if they do, delete the comment text | |
6768 | ||
6769 | f. New application-settable completion variable: | |
6770 | rl_completion_mark_symlink_dirs, allows an application's completion | |
6771 | function to temporarily override the user's preference for appending | |
6772 | slashes to names which are symlinks to directories. | |
6773 | ||
6774 | g. New function available to application completion functions: | |
6775 | rl_completion_mode, to tell how the completion function was invoked | |
6776 | and decide which argument to supply to rl_complete_internal (to list | |
6777 | completions, etc.). | |
6778 | ||
6779 | h. Readline now has an overwrite mode, toggled by the `overwrite-mode' | |
6780 | bindable command, which could be bound to `Insert'. | |
6781 | ||
6782 | i. New application-settable completion variable: | |
6783 | rl_completion_suppress_append, inhibits appending of | |
6784 | rl_completion_append_character to completed words. | |
6785 | ||
6786 | j. New key bindings when reading an incremental search string: ^W yanks | |
6787 | the currently-matched word out of the current line into the search | |
6788 | string; ^Y yanks the rest of the current line into the search string, | |
6789 | DEL or ^H deletes characters from the search string. | |
6790 | ||
6791 | ------------------------------------------------------------------------------ | |
f73dda09 JA |
6792 | This document details the changes between this version, bash-2.05a-release, |
6793 | and the previous version, bash-2.05a-rc1. | |
6794 | ||
6795 | 1. Changes to Bash | |
6796 | ||
6797 | a. Fixed the `printf' builtin so that the variable name supplied as an | |
6798 | argument to a %n conversion must be a valid shell identifier. | |
6799 | ||
6800 | b. Improved the random number generator slightly. | |
6801 | ||
6802 | c. Changes to configuration to not put -I/usr/include into $CFLAGS, since | |
6803 | it messes up some includes. | |
6804 | ||
6805 | d. Corrected description of POSIXLY_CORRECT in man page and info manual. | |
6806 | ||
6807 | e. Fixed a couple of cases of incorrect function prototypes that sneaked | |
6808 | through and caused compilation problems. | |
6809 | ||
6810 | f. A few changes to avoid potential core dumps in the programmable completion | |
6811 | code. | |
6812 | ||
6813 | g. Fixed a configure problem that could cause a non-existent file to show | |
6814 | up in LIBOBJS. | |
6815 | ||
6816 | h. Fixed a configure problem that could cause siglist.o to not be built when | |
6817 | required. | |
6818 | ||
6819 | i. Changes to the strtoimax and strtoumax replacement functions to work | |
6820 | around buggy compilers. | |
6821 | ||
6822 | j. Fixed a problem with the snprintf replacement function that could | |
6823 | potentially cause a core dump. | |
6824 | ||
6825 | 2. Changes to Readline | |
6826 | ||
6827 | a. Fixed a locale-specific problem in the vi-mode `goto mark' command. | |
6828 | ||
6829 | b. Fixed Makefile to not put -I/usr/include into CFLAGS, since it can cause | |
6830 | include file problems. | |
6831 | ||
6832 | ------------------------------------------------------------------------------ | |
6833 | This document details the changes between this version, bash-2.05a-rc1, | |
6834 | and the previous version, bash-2.05a-beta1. | |
6835 | ||
6836 | 1. Changes to Bash | |
6837 | ||
6838 | a. Fixed the snprintf replacement to correctly implement the `alternate form' | |
6839 | of the %g and %G conversions. | |
6840 | ||
6841 | b. Fixed snprintf to correctly handle the optional precision with the %g and | |
6842 | %G conversions. | |
6843 | ||
6844 | c. Fixed the arithmetic evaluation code to correct the values of `@' and `_' | |
6845 | when translating base-64 constants (they were backwards). | |
6846 | ||
6847 | d. New library functions for formatting long and long long ints. | |
6848 | ||
6849 | e. Fixed a few places where negative array subscripts could have occurred, | |
6850 | mostly as the result of systems using signed characters. | |
6851 | ||
6852 | f. Fixed a few places that assumed a pid_t was no wider than an int. | |
6853 | ||
6854 | g. Fixed the `maildir' mail checking code to work on systems where a | |
6855 | `struct stat' doesn't include an `st_blocks' member. | |
6856 | ||
6857 | h. Fixed snprintf to make `unsigned long long' conversion formats (%llu) | |
6858 | work better. | |
6859 | ||
6860 | i. Fixed snprintf to not print a sign when asked to do an unsigned conversion. | |
6861 | ||
6862 | j. Made configure changes to avoid compiling empty source files in lib/sh. | |
6863 | ||
6864 | k. New replacement functions (if necessary) for strtoull, strtoll, strtoimax, | |
6865 | strtoumax. | |
6866 | ||
6867 | l. The `printf' builtin now handles the `ll' and `j' length modifiers | |
6868 | directly, since they can affect the type and width of the argument | |
6869 | passed to printf(3). | |
6870 | ||
6871 | m. Renamed a number of the bash-specific autoconf macros in aclocal.m4 to | |
8868edaf | 6872 | have more systematic naming, with accompanying changes to configure.in. |
f73dda09 JA |
6873 | |
6874 | n. Fixed snprintf to handle long doubles and the %a/%A conversions by | |
6875 | falling back to sprintf, as long as sprintf supports them. | |
6876 | ||
6877 | o. Fixed return value from vsnprintf/snprintf to be the number of characters | |
6878 | that would have been printed, even if that number exceeds the buffer | |
6879 | size passed as an argument. | |
6880 | ||
6881 | p. Bash no longer attempts to define its own versions of some ctype macros | |
6882 | if they are implemented as functions in libc but not as macros in | |
6883 | <ctype.h>. | |
6884 | ||
6885 | q. Changed the variable printing code (used by `set', `export', etc.) to | |
6886 | not use the $'...' syntax when in posix mode, since that caused | |
6887 | interoperability problems with other shells (most notably with autoconf). | |
6888 | When not in posix mode, it uses $'...' if the string to be printed | |
6889 | contains non-printing characters and regular single quotes otherwise. | |
6890 | ||
6891 | r. snprintf now recognizes the %F conversion. | |
6892 | ||
6893 | s. Fixed a bug that could cause the wrong status to be returned by a shell | |
6894 | function when the shell is compiled without job control and a null | |
6895 | command containing a command substutition was executed in the function. | |
6896 | ||
6897 | t. When in posix mode, the default value for MAILCHECK is 600. | |
6898 | ||
6899 | u. Bash only initializes FUNCNAME, GROUPS, and DIRSTACK as special variables | |
6900 | if they're not in the initial environment. | |
6901 | ||
6902 | v. If SECONDS appears in the initial environment with a valid integer value, | |
6903 | bash uses that as the starting value, as if an assignment had been | |
6904 | performed. | |
6905 | ||
6906 | w. Bash no longer auto-exports HOME, PATH, SHELL, or TERM, even though it | |
6907 | gives them default values if they don't appear in the initial environment. | |
6908 | ||
6909 | x. Bash no longer auto-exports HOSTNAME, HOSTTYPE, MACHTYPE, or OSTYPE, | |
6910 | even if it assigns them default values. | |
6911 | ||
6912 | y. Bash no longer removes the export attribute from SSH_CLIENT or SSH2_CLIENT | |
6913 | if they appear in the initial environment. | |
6914 | ||
6915 | z. Bash no longer attempts to discover if it's being run by sshd in order to | |
6916 | run the startup files. If the SSH_SOURCE_BASHRC is uncommented in | |
6917 | config-top.h it will attempt to do so as previously, but that's commented | |
6918 | out in the distributed version. | |
6919 | ||
6920 | aa. Fixed a typo in the code that tests for LC_NUMERIC. | |
6921 | ||
6922 | bb. The POSIXLY_CORRECT shell variable and its effects are now documented. | |
6923 | ||
6924 | cc. Some changes to several of the support shell scripts included in the | |
6925 | definitions to try to avoid race conditions and attacks. | |
6926 | ||
6927 | dd. Several changes to avoid warnings from `gcc -Wall'. | |
6928 | ||
6929 | ee. Fixed a problem with the `unset' builtin that could cause incorrect | |
6930 | results if asked to unset a variable and an array subscript in the | |
6931 | same command. | |
6932 | ||
6933 | ff. A few changes to the shell's temporary file creation code to avoid | |
6934 | potential file descriptor leaks and to prefer the system's idea of | |
6935 | the temporary directory to use. | |
6936 | ||
6937 | gg. Fixes to build with the C alloca in lib/malloc/alloca.c if the system | |
6938 | requires it but the shell has been configured --without-bash-malloc. | |
6939 | ||
6940 | hh. Updated the documentation to note that only interactive shells resend | |
6941 | SIGHUP to all jobs before exiting. | |
6942 | ||
6943 | ii. Fixes to only pass unquoted tilde words to tilde_expand, rather than | |
6944 | rely on tilde_expand or getpwnam(3) to handle the quotes (MacOS 10.x | |
6945 | will remove backslashes in any login name passed to getpwnam(3)). | |
6946 | ||
6947 | jj. Small change from Paul Eggert to make LINENO right in commands run with | |
6948 | `bash -c'. | |
6949 | ||
6950 | 2. New Features in Bash | |
6951 | ||
6952 | a. The `printf' builtin now handles the %a and %A conversions if they're | |
6953 | implemented by printf(3). | |
6954 | ||
6955 | b. The `printf' builtin now handles the %F conversion (just about like %f). | |
6956 | ||
6957 | c. The `printf' builtin now handles the %n conversion like printf(3). The | |
6958 | corresponding argument is the name of a shell variable to which the | |
6959 | value is assigned. | |
6960 | ||
6961 | 3. Changes to Readline | |
6962 | ||
6963 | a. Fixed a few places where negative array subscripts could have occurred. | |
6964 | ||
6965 | b. Fixed the vi-mode code to use a better method to determine the bounds of | |
6966 | the array used to hold the marks. | |
6967 | ||
6968 | c. Fixed the defines in chardefs.h to work better when chars are signed. | |
6969 | ||
6970 | d. Fixed configure.in to use the new names for bash autoconf macros. | |
6971 | ||
6972 | e. Readline no longer attempts to define its own versions of some ctype | |
6973 | macros if they are implemented as functions in libc but not as macros in | |
6974 | <ctype.h>. | |
6975 | ||
6976 | f. Fixed a problem where rl_backward could possibly set point to before | |
6977 | the beginning of the line. | |
6978 | ||
6979 | ------------------------------------------------------------------------------ | |
6980 | This document details the changes between this version, bash-2.05a-beta1, | |
6981 | and the previous version, bash-2.05a-alpha1. | |
6982 | ||
6983 | 1. Changes to Bash | |
6984 | ||
8868edaf | 6985 | a. Fixed a bug in the evaluation of arithmetic `for' statements when the |
f73dda09 JA |
6986 | expanded expression is NULL. |
6987 | ||
6988 | b. Fixed an unassigned variable problem in the redirection printing code. | |
6989 | ||
6990 | c. Added more prototypes to extern function declarations in the header | |
6991 | files and to static function declarations in C source files. | |
6992 | ||
6993 | d. Make sure called functions have a prototype in scope, to get the arguments | |
6994 | and return values right instead of casting. Removed extern function | |
6995 | declarations from C source files that were already included in header | |
6996 | files. | |
6997 | ||
6998 | e. Changed some function arguments to use function typedefs in general.h so | |
6999 | the prototypes can be checked. The only use of Function and VFunction | |
7000 | now is for unwind-protects. | |
7001 | ||
7002 | f. More const changes to function arguments and appropriate variables. | |
7003 | ||
7004 | g. Changed the mail checking support to handle `maildir'-style mail | |
7005 | directories. | |
7006 | ||
7007 | h. Augmented the bash malloc to pass in the file and line number information | |
7008 | for each malloc, realloc, and free. This should result in better error | |
7009 | messages. | |
7010 | ||
7011 | i. The `old' gnu malloc is no longer a configuration option. | |
7012 | ||
7013 | j. Augmented the bash malloc with optional tracing and registering allocated | |
7014 | and freed memory. | |
7015 | ||
7016 | k. Prompt string decoding now saves and restores the value of $? when it | |
7017 | expands the prompt string, so command substitutions don't change $?. | |
7018 | ||
7019 | i. Array indices are now `long', since shell arithmetic is performed as long, | |
7020 | and the internal arrayind_t type is used consistently. | |
7021 | ||
7022 | j. Some more `unsigned char *' fixes from Paul Eggert. | |
7023 | ||
7024 | k. Fixed a bad call to builtin_error that could cause core dumps when making | |
7025 | local variables. | |
7026 | ||
7027 | l. `return' may no longer be used to terminate a `select' command, for | |
7028 | compatibility with ksh. | |
7029 | ||
7030 | m. Changed code that reads octal numbers to do a better job of detecting | |
7031 | overflows. | |
7032 | ||
7033 | n. The time formatting code no longer uses absolute indices into a buffer, | |
7034 | because the buffer size changes depending on the size of a `time_t'. | |
7035 | ||
7036 | o. `umask' now prints four digits when printing in octal mode, for | |
7037 | compatibility with other shells. | |
7038 | ||
7039 | p. Lots of changes to the `printf' builtin from Paul Eggert: it handles `L' | |
7040 | formats and long doubles better, and internal functions have been | |
8868edaf | 7041 | simplified where appropriate. |
f73dda09 JA |
7042 | |
7043 | q. Some `time_t' fixes for machines were a time_t is bigger than a long. | |
7044 | ||
7045 | r. Replaced some bash-specific autoconf macros with standard equivalents. | |
7046 | ||
7047 | s. Improvmed the code that constructs temporary filenames to make the | |
7048 | generated names a bit more random. | |
7049 | ||
7050 | t. Added code that checks for ascii before calling any of the is* ctype | |
7051 | functions. | |
7052 | ||
7053 | u. Changed some places where a `char' was used as an array subscript to use | |
7054 | `unsigned char', since a `char' can be negative if it's signed by default. | |
7055 | ||
7056 | v. Lots of changes to the `ulimit' builtin from Paul Eggert to add support | |
7057 | for the new POSIX-200x RLIM_SAVED_CUR and RLIM_SAVED_MAX values and | |
7058 | simplify the code. | |
7059 | ||
7060 | w. `ulimit' now prints the description of a resource in any error message | |
7061 | relating to fetching or setting that resource's limits. | |
7062 | ||
7063 | x. The `snprintf' replacement now computes maximum values at compile | |
7064 | time rather than using huge constants for things like long long. | |
7065 | ||
7066 | y. Interactive shells now ignore `set -n'. | |
7067 | ||
7068 | z. Changed the malloc bookkeeping information so that it's now 8 bytes | |
7069 | instead of 12 on most 32-bit machines (saving 4 bytes per allocation), | |
7070 | restoring 8-byte alignment. | |
7071 | ||
7072 | aa. The malloc error reporting code now attempts to print the file and line | |
7073 | number of the call that caused the error. | |
7074 | ||
7075 | bb. Changed the redirection error reporting code to catch EBADF errors and | |
7076 | report the file descriptor number rather than the file being redirected | |
7077 | to or from (e.g., things like `exec 4242<x' where 4242 is an out-of-range | |
7078 | file descriptor). | |
7079 | ||
7080 | cc. `printf', `echo -e', and the $'...' code now process only two hex digits | |
7081 | after a `\x' escape sequence for compatibility with other shells, and | |
7082 | the documentation was changed to note that the octal and hex escape | |
7083 | sequences result in an eight-bit value rather than strict ASCII. | |
7084 | ||
7085 | 2. Changes to Readline | |
7086 | ||
7087 | a. The completion code now attempts to do a better job of preserving the | |
7088 | case of the word the user typed if ignoring case in completions. | |
7089 | ||
7090 | b. Readline defaults to not echoing the input and lets the terminal | |
7091 | initialization code enable echoing if there is a controlling terminal. | |
7092 | ||
7093 | c. The key binding code now processes only two hex digits after a `\x' | |
7094 | escape sequence, and the documentation was changed to note that the | |
7095 | octal and hex escape sequences result in an eight-bit value rather | |
7096 | than strict ASCII. | |
7097 | ||
7098 | 3. New Features in Bash | |
7099 | ||
7100 | a. The builtin `ulimit' now takes two new non-numeric arguments: `hard', | |
7101 | meaning the current hard limit, and `soft', meaning the current soft | |
7102 | limit, in addition to `unlimited' | |
7103 | ||
7104 | b. `ulimit' now prints the option letter associated with a particular | |
7105 | resource when printing more than one limit. | |
7106 | ||
7107 | c. `ulimit' prints `hard' or `soft' when a value is not `unlimited' but is | |
7108 | one of RLIM_SAVED_MAX or RLIM_SAVED_CUR, respectively. | |
7109 | ||
7110 | 4. New Features in Readline | |
7111 | ||
7112 | a. New bindable variable `history-preserve-point'. If set, the history | |
7113 | code attempts to place the user at the same location on each history | |
8868edaf | 7114 | line retrieved with previous-history or next-history. |
f73dda09 JA |
7115 | |
7116 | ------------------------------------------------------------------------------ | |
7117 | This document details the changes between this version, bash-2.05a-alpha1, | |
7118 | and the previous version, bash-2.05-release. | |
7119 | ||
7120 | 1. Changes to Bash | |
7121 | ||
7122 | a. Better checks in the redirection code for write errors. | |
7123 | ||
7124 | b. bashbug now uses $TMPDIR, defaulting to /tmp, and uses mktemp(1) more | |
7125 | portably. | |
7126 | ||
7127 | c. System-specific configuration changes for: Interix, OpenBSD, FreeBSD, | |
7128 | MacOS X. | |
7129 | ||
7130 | d. Some more `const' cleanups through the code. | |
7131 | ||
7132 | e. Fixed a typo in the /dev/fd redirection code, better checks for valid | |
7133 | numeric fds in /dev/fd. | |
7134 | ||
7135 | f. Fixed many parts of the shell to handle integer overflow more gracefully | |
7136 | and to do more stringent checks for valid numbers. | |
7137 | ||
7138 | g. Fixed mksignames to include config.h. | |
7139 | ||
7140 | h. Fixed an uninitialized variable problem that could cause the shell to core | |
7141 | dump when replacing characters in a string. | |
7142 | ||
7143 | i. New mechanism for updating the patch level when official patches are | |
7144 | released (patchlevel.h). | |
7145 | ||
7146 | j. configure.in changed to no longer require external files _distribution and | |
7147 | _patchlevel. | |
7148 | ||
7149 | k. Fixed non-interactive shell initialization problem when bash started as | |
7150 | `bash -i filename'. | |
7151 | ||
7152 | l. Fixed printf builtin conversion error handling to be POSIX.2-conformant. | |
7153 | ||
7154 | m. autoconf-2.52 is now used to build configure; autoconf-2.50 or newer is | |
7155 | required. Some of the bash-specific macros were removed, since they are | |
7156 | now standard. | |
7157 | ||
7158 | n. Startup files and files read with source or `.' are no longer required to | |
7159 | be regular files. | |
7160 | ||
7161 | o. Fixed core dump in builtin printf when user-supplied precision or field | |
7162 | width is 0. | |
7163 | ||
7164 | p. Fixed builtin printf to treat a negative field width as a positive field | |
7165 | width with left-justification. | |
7166 | ||
7167 | r. New unwind-protect implementation from Paul Eggert. | |
7168 | ||
7169 | s. Fixed an inadvertently-unclosed comment in the bash completion code that | |
7170 | caused programmable completions to not add trailing slashes or spaces to | |
7171 | completions. | |
7172 | ||
7173 | t. Fixed the process substitution code to cope better when stdin is closed. | |
7174 | ||
7175 | v. Fixes, mostly from Paul Eggert, for a few possible buffer overflows in | |
7176 | the shell. | |
7177 | ||
7178 | w. Fixes from Paul Eggert to avoid most of the type casts in the shell code, | |
7179 | and use more appropriate types for a number of variables. | |
7180 | ||
8868edaf | 7181 | x. Command substitution no longer inherits the DEBUG trap. |
f73dda09 | 7182 | |
8868edaf | 7183 | y. Some fixes to the process substitution code on machines without /dev/fd so |
f73dda09 JA |
7184 | that named pipes are not removed inappropriately. |
7185 | ||
7186 | z. The loadable `getconf' builtin is now much more complete, and will become | |
7187 | part of the shell in the future. | |
7188 | ||
7189 | aa. The select command no longer terminates on a `return', so it can be used | |
7190 | to return from an enclosing function (as ksh does it). | |
7191 | ||
7192 | bb. Fixed the extended pattern matching code to behave better when presented | |
7193 | with incorrectly-formed patterns. | |
7194 | ||
7195 | cc. Some changes were made with the intent of making cross-compilation easier. | |
7196 | ||
7197 | dd. The network code (/dev/tcp and /dev/udp redirections) uses getaddrinfo(3) | |
7198 | if it's available, which adds support for IPv6. | |
7199 | ||
7200 | ee. Subshells of login shells no longer source ~/.bash_logout when they exit. | |
7201 | ||
7202 | ff. Fixes so that subshells don't exit inappropriately if the -e option has | |
7203 | been set. | |
7204 | ||
7205 | gg. Restricted shells no longer allow functions to be exported. | |
7206 | ||
7207 | hh. Changes to the pattern matching code so extended pattern matching works | |
7208 | on systems with deficient shared library implementations, like MacOS X. | |
7209 | ||
7210 | ii. Better error messages when a script with a leading `#!interp' fails | |
7211 | to execute because of problems with `interp'. | |
7212 | ||
7213 | jj. Fixed `compgen' to handle the `-o default' option better. | |
7214 | ||
7215 | kk. Fixed the job control code to force an asynchronous process's standard | |
7216 | input to /dev/null only if job control is not active. | |
7217 | ||
7218 | ll. Fixed a possible infinite recursion problem when `fc ""=abc' (a null | |
7219 | pattern) is used to re-execute a previous command. | |
7220 | ||
7221 | mm. Fixed `declare [-a] var=value' to assign VALUE to element 0 if VAR is an | |
7222 | array variable. Similarly for `declare [-a] var[N]=value'. This is like | |
7223 | ksh93. | |
7224 | ||
7225 | nn. Fixed a bug that caused `read -a aname' to work even if ANAME had been | |
7226 | declared readonly. | |
7227 | ||
7228 | oo. Fixed a possible integer overflow problem when constructing names for | |
7229 | temporary files. | |
7230 | ||
7231 | 2. New Features in Bash | |
7232 | ||
7233 | a. Added support for DESTDIR installation root prefix, so you can do a | |
7234 | `make install DESTDIR=bash-root' and do easier binary packaging. | |
7235 | ||
7236 | b. Added support for builtin printf "'" flag character as per latest POSIX | |
7237 | drafts. | |
7238 | ||
7239 | c. Support for POSIX.2 printf(1) length specifiers `j', `t', and `z' (from | |
7240 | ISO C99). | |
7241 | ||
7242 | d. New autoconf macro, RL_LIB_READLINE_VERSION, for use by other applications | |
7243 | (bash doesn't use very much of what it returns). | |
7244 | ||
7245 | e. `set [-+]o nolog' is recognized as required by the latest POSIX drafts, | |
7246 | but ignored. | |
7247 | ||
7248 | f. New read-only `shopt' option: login_shell. Set to non-zero value if the | |
7249 | shell is a login shell. | |
7250 | ||
7251 | g. New `\A' prompt string escape sequence; expands to time in 24 HH:MM format. | |
7252 | ||
7253 | h. New `-A group/-g' option to complete and compgen; does group name | |
7254 | completion. | |
7255 | ||
7256 | i. New `-t' option to `hash' to list hash values for each filename argument. | |
7257 | ||
7258 | j. New [-+]O invocation option to set and unset `shopt' options at startup. | |
7259 | ||
7260 | k. configure's `--with-installed-readline' option now takes an optional | |
7261 | `=PATH' suffix to set the root of the tree where readline is installed | |
7262 | to PATH. | |
7263 | ||
7264 | l. The ksh-like `ERR' trap has been added. The `ERR' trap will be run | |
7265 | whenever the shell would have exited if the -e option were enabled. | |
7266 | It is not inherited by shell functions. | |
7267 | ||
7268 | m. `readonly', `export', and `declare' now print variables which have been | |
7269 | given attributes but not set by assigning a value as just a command and | |
7270 | a variable name (like `export foo') when listing, as the latest POSIX | |
7271 | drafts require. | |
7272 | ||
7273 | n. `bashbug' now requires that the subject be changed from the default. | |
7274 | ||
7275 | o. configure has a new `--enable-largefile' option, like other GNU utilities. | |
7276 | ||
7277 | p. `for' loops now allow empty word lists after `in', like the latest POSIX | |
7278 | drafts require. | |
7279 | ||
7280 | 3. Changes to Readline | |
7281 | ||
7282 | a. More `const' and type casting fixes. | |
7283 | ||
7284 | b. Changed rl_message() to use vsnprintf(3) (if available) to fix buffer | |
7285 | overflow problems. | |
7286 | ||
7287 | c. The completion code no longer appends a `/' or ` ' to a match when | |
7288 | completing a symbolic link that resolves to a directory name, unless | |
7289 | the match does not add anything to the word being completed. This | |
7290 | means that a tab will complete the word up to the full name, but not | |
7291 | add anything, and a subsequent tab will add a slash. | |
7292 | ||
7293 | d. Fixed a trivial typo that made the vi-mode `dT' command not work. | |
7294 | ||
7295 | e. Fixed the tty code so that ^S and ^Q can be inserted with rl_quoted_insert. | |
7296 | ||
7297 | f. Fixed the tty code so that ^V works more than once. | |
7298 | ||
7299 | g. Changed the use of __P((...)) for function prototypes to PARAMS((...)) | |
7300 | because the use of __P in typedefs conflicted g++ and glibc. | |
7301 | ||
7302 | 4. New Features in Readline | |
7303 | ||
7304 | a. Added extern declaration for rl_get_termcap to readline.h, making it a | |
7305 | public function (it was always there, just not in readline.h). | |
7306 | ||
7307 | b. New #defines in readline.h: RL_READLINE_VERSION, currently 0x0402, | |
7308 | RL_VERSION_MAJOR, currently 4, and RL_VERSION_MINOR, currently 2. | |
7309 | ||
7310 | c. New readline variable: rl_readline_version, mirrors RL_READLINE_VERSION. | |
7311 | ||
7312 | d. New bindable boolean readline variable: match-hidden-files. Controls | |
7313 | completion of files beginning with a `.' (on Unix). Enabled by default. | |
7314 | ||
7315 | e. The history expansion code now allows any character to terminate a | |
7316 | `:first-' modifier, like csh. | |
7317 | ||
7318 | f. The incremental search code remembers the last search string and uses | |
7319 | it if ^R^R is typed without a search string. | |
7320 | ||
7321 | ------------------------------------------------------------------------------ | |
28ef6c31 JA |
7322 | This document details the changes between this version, bash-2.05-release, |
7323 | and the previous version, bash-2.05-beta2. | |
7324 | ||
7325 | 1. Changes to Bash | |
7326 | ||
7327 | a. Make sure we note that the first line of a multi-line command was not | |
7328 | saved in the history if the tests for HISTCONTROL succeed, but the | |
7329 | HISTIGNORE check fails. | |
7330 | ||
7331 | b. Fixed a bug in the pattern matching code that caused `[' to be treated | |
7332 | as a special character inside a `[...]' bracket expression. | |
7333 | ||
7334 | c. Fixed a bug in the pattern matching code that caused `]' to terminate | |
7335 | a bracket expression even if it was the first character after the `[' | |
7336 | (or a leading `!' or `^'). | |
7337 | ||
7338 | d. Made a small change to report a more user-friendly error message if | |
7339 | execve(2) fails because of an error with the interpreter in a script | |
7340 | with a leading `#! interpreter'. | |
7341 | ||
7342 | e. If the OS does not support an exec(2) magic number of `#!', make sure we | |
7343 | have a non-null interpreter name before attempting to execute it. | |
7344 | ||
7345 | f. Fixed a bug that caused the shell process to end up in a different | |
7346 | process group than the controlling terminal if a job-control shell was | |
7347 | run with `exec' in the startup files. | |
7348 | ||
7349 | g. When started in POSIX mode, either by `bash --posix', `bash -o posix', or | |
7350 | `sh', $SHELLOPTS includes `posix' and POSIXLY_CORRECT is set. | |
7351 | ||
7352 | h. Fixed a problem that caused the `\W' prompt string escape sequence to | |
7353 | expand to nothing when $PWD was `//'. | |
7354 | ||
7355 | i. The `bashbug' shell script no longer uses $(...) command substitution. | |
7356 | ||
7357 | j. When `set' is invoked without options in POSIX mode, it no longer prints | |
7358 | the names and definitions of shell functions. | |
7359 | ||
7360 | 2. Changes to Readline | |
7361 | ||
7362 | a. rl_set_paren_blink_timeout() is now documented. | |
7363 | ||
7364 | b. Corrected history.3 man page: `$' is not in the default value of | |
7365 | history_word_delimiters. | |
7366 | ||
7367 | c. If a hook function assigned to rl_event_hook sets rl_done to a non-zero | |
7368 | value, rl_read_key() now immediately returns '\n' (which is assumed to | |
7369 | be bound to accept-line). | |
7370 | ||
7371 | 3. New Features in Bash | |
7372 | ||
7373 | a. The `>&word' redirection now works in POSIX mode as it does by default, | |
7374 | since POSIX.2 leaves it unspecified. | |
7375 | ||
7376 | ------------------------------------------------------------------------------ | |
7377 | This document details the changes between this version, bash-2.05-beta2, | |
7378 | and the previous version, bash-2.05-beta1. | |
7379 | ||
7380 | 1. Changes to Bash | |
7381 | ||
7382 | a. Fixed a bug in the arithmetic evaluation code so that a^=b is supported. | |
7383 | ||
7384 | b. Fixed startup so posixly_correct is retained across subshells begun to | |
7385 | execute scripts without a leading `#!'. | |
7386 | ||
7387 | c. Fixed a bug that caused $(< file) to not work in a (...) subshell. | |
7388 | ||
7389 | d. Added config support for Linux running on the IBM S390. | |
7390 | ||
7391 | e. Fixed a bug that caused bash to get its input pointer out of sync when | |
7392 | reading commands through a pipe and running a command with standard | |
7393 | input redirected from a file. | |
7394 | ||
7395 | f. Made a change so that command completion now makes about half as many | |
7396 | stat(2) calls when searching the $PATH. | |
7397 | ||
7398 | g. Fixed a bug that caused variable assignments preceding `return' to not | |
7399 | be propagated to the shell environment in POSIX mode. | |
7400 | ||
7401 | h. Fixed a bug with ${parameter[:]?word} -- tilde expansion was not performed | |
7402 | on `word'. | |
7403 | ||
7404 | i. In POSIX mode, `break' and `continue' do not complain and return success | |
7405 | if called when the shell is not executing a loop. | |
7406 | ||
7407 | j. Fixed `bash -o posix' to work the same as `bash --posix'. | |
7408 | ||
7409 | k. Fixed a bug where variable assignments preceding `eval' or `source/.' | |
7410 | would not show up in the environment exported to subshells run by the | |
7411 | commands. | |
7412 | ||
7413 | l. In POSIX mode, shells started to execute command substitutions inherit | |
7414 | the value of the `-e' option from their parent shell. | |
7415 | ||
7416 | m. In POSIX mode, aliases are expanded even in non-interactive shells. | |
7417 | ||
7418 | n. Changed some of the job control messages to display the text required by | |
7419 | POSIX.2 when the shell is in POSIX mode. | |
7420 | ||
7421 | o. Fixed a bug in `test' that caused it to occasionally return incorrect | |
7422 | results when non-numeric arguments were supplied to `-t'. | |
7423 | ||
7424 | 2. Changes to Readline | |
7425 | ||
7426 | a. Some changes were made to avoid gcc warnings with -Wall. | |
7427 | ||
7428 | b. rl_get_keymap_by_name now finds keymaps case-insensitively, so | |
7429 | `set keymap EMACS' works. | |
7430 | ||
7431 | c. The history file writing and truncation functions now return a useful | |
7432 | status on error. | |
7433 | ||
7434 | d. Fixed a bug that could cause applications to dereference a NULL pointer | |
7435 | if a NULL second argument was passed to history_expand(). | |
7436 | ||
7437 | 3. New Features in Bash | |
7438 | ||
7439 | a. doc/readline.3 has been moved to the readline distribution. | |
7440 | ||
7441 | 4. New Features in Readline | |
7442 | ||
7443 | a. New function, rl_get_screen_size (int *rows, int *columns), returns | |
7444 | readline's idea of the screen dimensions. | |
7445 | ||
7446 | b. The timeout in rl_gather_tyi (readline keyboard input polling function) | |
7447 | is now settable via a function (rl_set_keyboard_input_timeout()). | |
7448 | ||
7449 | c. Renamed the max_input_history variable to history_max_entries; the old | |
7450 | variable is maintained for backwards compatibility. | |
7451 | ||
7452 | d. The list of characters that separate words for the history tokenizer is | |
7453 | now settable with a variable: history_word_delimiters. The default | |
7454 | value is as before. | |
7455 | ||
7456 | ------------------------------------------------------------------------------ | |
7457 | This document details the changes between this version, bash-2.05-beta1, | |
7458 | and the previous version, bash-2.05-alpha1. | |
7459 | ||
7460 | 1. Changes to Bash | |
7461 | ||
7462 | a. Changes to allow shared library and object building on the GNU Hurd. | |
7463 | ||
7464 | b. Fixes to the way exported functions are placed into the environment and | |
7465 | cached. | |
7466 | ||
7467 | c. The globbing library once again respects locales when processing ranges | |
7468 | in bracket expressions while doing pattern matching. | |
7469 | ||
7470 | d. System-specific configuration changes for: Tru 64, Interix | |
7471 | ||
7472 | e. Bashbug now uses /usr/bin/editor as one of the editing alternatives, and | |
7473 | will use mktemp(1) or tempfile(1), if present, for temporary file creation. | |
7474 | ||
7475 | f. Bash no longer performs a binary file check on a script argument that's | |
7476 | really a tty (like /dev/fd/0 or /dev/stdin). | |
7477 | ||
7478 | g. Fixed a bug in the execution of shell scripts that caused the effects of | |
7479 | $BASH_ENV to be undone in some cases. | |
7480 | ||
7481 | h. Fixed several bugs that made `bash [-i] /dev/stdin' not work correctly. | |
7482 | ||
7483 | i. Several changes to the job control code to avoid some signal state | |
7484 | manipulation. | |
7485 | ||
7486 | j. The Bash malloc no longer blocks signals as often, which should make it | |
7487 | faster. | |
7488 | ||
7489 | k. Fixed a parsing bug that did not allow backslash to escape a single quote | |
7490 | inside a $'...' construct. | |
7491 | ||
7492 | l. Fixed a bug that caused things like ${var:=$'value'} to be parsed | |
7493 | incorrectly. This showed up in newer versions of autoconf. | |
7494 | ||
7495 | m. Fixed a bug in the bash-specific readline initialization that caused | |
7496 | key bindings to bash-specific function names appearing in .inputrc to | |
7497 | not be honored. | |
7498 | ||
7499 | n. Bash now sets the file descriptor it uses to save the file descriptor | |
7500 | opened on a shell script to close on exec. | |
7501 | ||
7502 | o. Fixed a bug in the prompt string decoding that caused it to misbehave | |
7503 | when presented an octal sequence of fewer than three characters. | |
7504 | ||
7505 | p. Fixed the `test' builtin to return an error if `[' is supplied a single | |
7506 | argument that is not `]'. | |
7507 | ||
7508 | q. Fixed a bug that caused subshells started to run executable shell scripts | |
7509 | without a leading `#!' to incorrectly inherit an argument list preceding | |
7510 | a shell builtin (like such a script called from a script sourced with `.', | |
7511 | where there were variable assignments preceding the `.' command) | |
7512 | ||
7513 | r. Fixed a bug that caused changes to variables supplied in an assignment | |
7514 | statement preceding a shell builtin to not be honored (like a script | |
7515 | run with `.'). | |
7516 | ||
7517 | s. HOSTTYPE, OSTYPE, and MACHTYPE are set only if they do not have values | |
7518 | when the shell is started. | |
7519 | ||
7520 | t. Fixed a bug that caused SIGINT to kill shell scripts after the script | |
7521 | called `wait'. | |
7522 | ||
7523 | u. The `fc' builtin now tries to create its temporary files in the directory | |
7524 | named by $TMPDIR. | |
7525 | ||
7526 | v. Bash no longer calls any Readline functions or uses any Readline variables | |
7527 | not declared in readline.h. | |
7528 | ||
7529 | w. Fixed a bug that caused some substitutions involving $@ to not be split | |
7530 | correctly, especially expansions of the form ${paramterOPword}. | |
7531 | ||
7532 | x. SSH2_CLIENT is now treated like SSH_CLIENT and not auto-exported if it | |
7533 | appears in the initial environment. | |
7534 | ||
7535 | y. Fixed a couple of problems with shell scripts without a leading `#!' | |
7536 | being executed out of shell functions that could cause core dumps if | |
7537 | such a script attempted to execute `return'. | |
7538 | ||
7539 | z. Fixed a problem with the `-nt' and `-ot' binary operators for the | |
7540 | `test/[' builtin and the `[[' conditional command that caused wrong | |
7541 | return values if one of the file arguments did not exist. | |
7542 | ||
7543 | aa. Fixed a bug that caused non-interactive shells which had previously | |
7544 | executed `shopt -s expand_aliases' to fail to expand aliases in a | |
7545 | command like `(command) &'. | |
7546 | ||
7547 | 2. Changes to Readline | |
7548 | ||
7549 | a. Changes to make most (but not yet all -- there is still crlf()) of the | |
7550 | exported readline functions declared in readline.h have an rl_ prefix. | |
7551 | ||
7552 | b. More `const' changes in function arguments, mostly for completion | |
7553 | functions. | |
7554 | ||
7555 | c. Fixed a bug in rl_forward that could cause the point to be set to before | |
7556 | the beginning of the line in vi mode. | |
7557 | ||
7558 | d. Fixed a bug in the callback read-char interface to make it work when a | |
7559 | readline function pushes some input onto the input stream with | |
7560 | rl_execute_next (like the incremental search functions). | |
7561 | ||
7562 | e. Fixed a file descriptor leak in the history file manipulation code that | |
7563 | was tripped when attempting to truncate a non-regular file (like | |
7564 | /dev/null). | |
7565 | ||
7566 | f. Some existing variables are now documented and part of the public | |
7567 | interface (declared in readline.h): rl_explict_arg, rl_numeric_arg, | |
7568 | rl_editing_mode, rl_last_func. | |
7569 | ||
7570 | g. Renamed rltty_set_default_bindings to rl_tty_set_default_bindings and | |
7571 | crlf to rl_crlf, so there are no public functions declared in readline.h | |
7572 | without an `rl_' prefix. The old functions still exist for backwards | |
7573 | compatibility. | |
7574 | ||
7575 | 3. New Features in Bash | |
7576 | ||
7577 | a. A new loadable builtin, realpath, which canonicalizes and expands symlinks | |
7578 | in pathname arguments. | |
7579 | ||
8868edaf | 7580 | b. When `set' is called without options, it prints function definitions in a |
28ef6c31 JA |
7581 | way that allows them to be reused as input. This affects `declare' and |
7582 | `declare -p' as well. | |
7583 | ||
7584 | 4. New Features in Readline | |
7585 | ||
7586 | a. New application-callable function rl_set_prompt(const char *prompt): | |
7587 | expands its prompt string argument and sets rl_prompt to the result. | |
7588 | ||
7589 | b. New application-callable function rl_set_screen_size(int rows, int cols): | |
7590 | public method for applications to set readline's idea of the screen | |
7591 | dimensions. | |
7592 | ||
7593 | c. The history example program (examples/histexamp.c) is now built as one | |
7594 | of the examples. | |
7595 | ||
7596 | ------------------------------------------------------------------------------ | |
7597 | This document details the changes between this version, bash-2.05-alpha1, | |
7598 | and the previous version, bash-2.04-release. | |
7599 | ||
7600 | 1. Changes to Bash | |
7601 | ||
7602 | a. A fix was made to allow newlines in compond array assignments. | |
7603 | ||
7604 | b. configure now checks for real-time signals with unusable values. | |
7605 | ||
7606 | c. Interactive shells no longer exit if a substitution fails because of an | |
7607 | unset variable within a sourced file. | |
7608 | ||
7609 | d. Fixed a problem with incorrect matching of extended glob patterns when | |
7610 | doing pattern substitution. | |
7611 | ||
7612 | e. `{' is now quoted by the completion code when it appears in a filename. | |
7613 | ||
7614 | f. Fixed an error in pattern matching that caused the matcher to not | |
7615 | correctly skip the rest of a bracket expression after a character | |
7616 | matched. | |
7617 | ||
7618 | g. Fixed a bug in the IFS word splitting code to make a non-whitespace IFS | |
7619 | character preceded by IFS whitespace part of the current delimiter rather | |
7620 | than generating a separate field. | |
7621 | ||
7622 | h. The {!prefix@} expansion now generates separate words, analogous to $@, | |
7623 | when double-quoted. | |
7624 | ||
7625 | i. Command substitution now ignores NUL bytes in the command output, and the | |
7626 | parser ignores them on input. | |
7627 | ||
7628 | j. A fix was made to the job control code to prevent hanging processes when | |
7629 | the shell thinks background processes are running but the kernel returns | |
7630 | -1/ECHILD from waitpid(). | |
7631 | ||
7632 | k. `pwd' now prints an error message if the write fails when displaying the | |
7633 | current directory. | |
7634 | ||
7635 | l. When in POSIX mode, the shell prints trap dispostions without a leading | |
7636 | `SIG' in the signal specification. | |
7637 | ||
7638 | m. Fixed a parser bug that caused the current command's line count to be | |
7639 | messed up by a compound array assignment. | |
7640 | ||
7641 | n. Fixed a bug in the unwind-protect code that caused bad behavior on machines | |
7642 | where ints and pointers are not the same size. | |
7643 | ||
7644 | o. System-specific configure changes for: MacOS X. | |
7645 | ||
7646 | p. Changes for Cygwin to translate \r\n and \r to \n and to set file | |
7647 | descriptors used for reading input to text mode in various places. | |
7648 | ||
7649 | q. Fixed a bug that caused `!' to occasionally not be honored when in | |
7650 | a (...) subshell. | |
7651 | ||
7652 | r. Bash no longer assumes that getcwd() will return any useful error message | |
7653 | in the buffer passed as an argument if the call fails. | |
7654 | ||
7655 | s. The `source', `.', and `fc' builtins no longer check whether a file is | |
7656 | binary before reading commands from it. | |
7657 | ||
7658 | t. Subshells no longer turn off job control when they exit, since that | |
7659 | sometimes resulted in the terminal being reset to the wrong process | |
7660 | group. | |
7661 | ||
7662 | u. The history code no longer tries to save the second and subsequent lines | |
7663 | of a multi-line command if the first line was not saved. | |
7664 | ||
7665 | v. The history saving code now does a better job of saving blank lines in a | |
7666 | multi-line command. | |
7667 | ||
7668 | w. Removed a `feature' that made `ulimit' silently translate `unlimited' to | |
7669 | the current hard limit, which obscured some kernel error returns. | |
7670 | ||
7671 | x. Fixed the grammar so that `}' is recognized as a reserved word after | |
7672 | another reserved word, rather than requiring a `;' or newline. This | |
7673 | means that constructs like | |
7674 | ||
7675 | { { echo a b c ; } } | |
7676 | ||
7677 | work as expected. | |
7678 | ||
7679 | y. Conditional commands ([[...]]) now perform tilde expansion on their | |
7680 | arguments. | |
7681 | ||
7682 | z. Noted in the documentation that `set -a' will cause functions to be | |
7683 | exported if they are defined after `set -a' is executed. | |
7684 | ||
7685 | aa. When an interactive login shell starts, if $PWD and $HOME refer to the | |
7686 | same directory but are not the same string, $PWD is set to $HOME. | |
7687 | ||
7688 | bb. Fixed `printf' to handle invalid floating point numbers better. | |
7689 | ||
7690 | cc. Temporary files are now created with random filenames, to improve security. | |
7691 | ||
7692 | dd. The readline initialization code now binds the custom bash functions and | |
7693 | key bindings after the readline defaults are set up. | |
7694 | ||
7695 | ee. Fixed the `source' builtin to no longer overwrite a shell function's | |
7696 | argument list, even if the sourced file changes the positional parameters. | |
7697 | ||
7698 | ff. A bug fix was made in the expansion of `$*' in contexts where it should | |
7699 | not be split, like assignment statements. | |
7700 | ||
7701 | gg. Fixed a bug in the parameter substring expansion to handle conditional | |
7702 | arithmetic expressions ( exp ? val1 : val2 ) without cutting the expression | |
7703 | off at the wrong `:'. | |
7704 | ||
7705 | hh. The `<>' redirection is no longer subject to the current setting of | |
7706 | `noclobber', as POSIX.2 specifies. | |
7707 | ||
7708 | ii. Fixed a bug in the conditional command parsing code that caused expressions | |
7709 | in parentheses to occasionally be parsed incorrectly. | |
7710 | ||
7711 | jj. Fixed a bug in the ((...)) arithmetic command to allow do...done or | |
7712 | {...} to follow the )) without an intervening list terminator. | |
7713 | ||
7714 | kk. `printf' now treats `\E' the same as `\e' when performing backslash escape | |
7715 | expansion for the `%b' format specifier. | |
7716 | ||
7717 | ll. When in POSIX mode, the shell no longer searches the current directory for | |
7718 | a file to be sourced with `.' or `source' if `.' is not in $PATH. | |
7719 | ||
7720 | mm. Interactive comments are no longer turned off when POSIX mode is disabled. | |
7721 | ||
7722 | nn. The UID, EUID, HOSTNAME variables are not set if they are in the shell's | |
7723 | environment when it starts up. | |
7724 | ||
7725 | oo. Fixed a bug in the `command' builtin so the effect of a command like | |
7726 | `command exec 4<file' is as if the `command' had been omitted. | |
7727 | ||
7728 | pp. ${foo[@]} and ${foo[*]} now work as in ksh93 if `foo' is not an array | |
7729 | variable. | |
7730 | ||
7731 | qq. ${#foo[X]}, where X is 0, @, or *, now work as in ksh93 if `foo' is not | |
7732 | an array variable. | |
7733 | ||
7734 | rr. The shell's idea of an absolute pathname now takes into account a | |
7735 | possible drive specification on Cygwin and other Windows systems. | |
7736 | ||
7737 | ss. Fixed a bug which caused incorrect parsing of some multi-character | |
7738 | constructs if they were split across input lines with backslash-newline | |
7739 | line continuation. | |
7740 | ||
7741 | tt. Fixed a bug that caused restricted shell mode to be set inappropriately | |
7742 | when trying to execute a shell script without a leading `#!'. | |
7743 | ||
7744 | uu. Shell function definitions no longer require that the body be a group | |
7745 | command ( {...} ), as POSIX.2 requires. | |
7746 | ||
7747 | vv. The `cd' and `pwd' builtins now process symlinks in pathnames internally | |
7748 | and should require many fewer calls to getcwd(). | |
7749 | ||
7750 | ww. Fixed a bug that caused a pipeline's process group to be set incorrectly | |
7751 | if one of the pipeline elements contained a command substitution. | |
7752 | ||
7753 | xx. Fixed a bug that caused core dumps when expanding the value of HISTIGNORE. | |
7754 | ||
7755 | yy. The output of `set' is now quoted using $'...' so invisible characters are | |
7756 | displayed as escape sequences. | |
7757 | ||
7758 | zz. Fixed the help text for `unset', since PATH and IFS may both be unset. | |
7759 | ||
7760 | aaa. The shell no longer puts directory names into the command hash table. | |
7761 | ||
7762 | bbb. Fixed a bug in `read' that caused it to occasionally free memory twice if | |
7763 | it was interrupted after reading a large amount of data. | |
7764 | ||
7765 | ccc. Assignment statements that attempt to assign values to readonly variables | |
7766 | now cause the command to return an error status. | |
7767 | ||
7768 | ddd. Fixed a bug that could cause incorrect output if a $(<file) construct was | |
7769 | interrupted. | |
7770 | ||
7771 | eee. GROUPS and FUNCNAME now return an error status when assignment is | |
7772 | attempted, but may be unset (in which case they lose their special | |
7773 | properties). In all respects except unsetting, they are readonly. | |
7774 | ||
7775 | fff. The string-to-integer conversion code now ignores trailing whitespace in | |
7776 | the string, even if strtol(3) does not. | |
7777 | ||
7778 | ggg. The tcsh magic-space function now does a better job of inserting the | |
7779 | space close to where the point was before the history expansion, rather | |
7780 | than just appending it. | |
7781 | ||
7782 | hhh. Fixed a bug which caused a file sourced from an interactive shell to | |
7783 | fill up the jobs table if it ran lots of jobs. | |
7784 | ||
7785 | iii. Fixed a bug in the parameter pattern substitution code to avoid infinite | |
7786 | recursion on zero-length matches. | |
7787 | ||
7788 | 2. Changes to Readline | |
7789 | ||
7790 | a. When setting the terminal attributes on systems using `struct termio', | |
7791 | readline waits for output to drain before changing the attributes. | |
7792 | ||
7793 | b. A fix was made to the history word tokenization code to avoid attempts to | |
7794 | dereference a null pointer. | |
7795 | ||
7796 | c. Readline now defaults rl_terminal_name to $TERM if the calling application | |
7797 | has left it unset, and tries to initialize with the resultant value. | |
7798 | ||
7799 | d. Instead of calling (*rl_getc_function)() directly to get input in certain | |
7800 | places, readline now calls rl_read_key() consistently. | |
7801 | ||
7802 | e. Fixed a bug in the completion code that allowed a backslash to quote a | |
7803 | single quote inside a single-quoted string. | |
7804 | ||
7805 | f. rl_prompt is no longer assigned directly from the argument to readline(), | |
7806 | but uses memory allocated by readline. This allows constant strings to | |
7807 | be passed to readline without problems arising when the prompt processing | |
7808 | code wants to modify the string. | |
7809 | ||
7810 | g. Fixed a bug that caused non-interactive history searches to return the | |
7811 | wrong line when performing multiple searches backward for the same string. | |
7812 | ||
7813 | h. Many variables, function arguments, and function return values are now | |
7814 | declared `const' where appropriate, to improve behavior when linking with | |
7815 | C++ code. | |
7816 | ||
7817 | i. The control character detection code now works better on systems where | |
7818 | `char' is unsigned by default. | |
7819 | ||
7820 | j. The vi-mode numeric argument is now capped at 999999, just like emacs mode. | |
7821 | ||
7822 | k. The Function, CPFunction, CPPFunction, and VFunction typedefs have been | |
7823 | replaced with a set of specific prototyped typedefs, though they are | |
7824 | still in the readline header files for backwards compatibility. | |
7825 | ||
7826 | m. Nearly all of the (undocumented) internal global variables in the library | |
7827 | now have an _rl_ prefix -- there were a number that did not, like | |
7828 | screenheight, screenwidth, alphabetic, etc. | |
7829 | ||
7830 | n. The ding() convenience function has been renamed to rl_ding(), though the | |
7831 | old function is still defined for backwards compatibility. | |
7832 | ||
7833 | o. The completion convenience functions filename_completion_function, | |
7834 | username_completion_function, and completion_matches now have an rl_ | |
7835 | prefix, though the old names are still defined for backwards compatibility. | |
7836 | ||
7837 | p. The functions shared by readline and bash (linkage is satisfied from bash | |
7838 | when compiling with bash, and internally otherwise) now have an sh_ prefix. | |
7839 | ||
7840 | q. Changed the shared library creation procedure on Linux and BSD/OS 4.x so | |
7841 | that the `soname' contains only the major version number rather than the | |
7842 | major and minor numbers. | |
7843 | ||
7844 | r. Fixed a redisplay bug that occurred when the prompt spanned more than one | |
7845 | physical line and contained invisible characters. | |
7846 | ||
7847 | 3. New Features in Bash | |
7848 | ||
7849 | a. Added a new `--init-file' invocation argument as a synonym for `--rcfile', | |
7850 | per the new GNU coding standards. | |
7851 | ||
7852 | b. The /dev/tcp and /dev/udp redirections now accept service names as well as | |
7853 | port numbers. | |
7854 | ||
7855 | c. `complete' and `compgen' now take a `-o value' option, which controls some | |
7856 | of the aspects of that compspec. Valid values are: | |
7857 | ||
7858 | default - perform bash default completion if programmable | |
7859 | completion produces no matches | |
7860 | dirnames - perform directory name completion if programmable | |
7861 | completion produces no matches | |
7862 | filenames - tell readline that the compspec produces filenames, | |
7863 | so it can do things like append slashes to | |
7864 | directory names and suppress trailing spaces | |
7865 | ||
7866 | 4. New Features in Readline | |
7867 | ||
7868 | a. The blink timeout for paren matching is now settable by applications. | |
7869 | ||
7870 | b. _rl_executing_macro has been renamed to rl_executing_macro, which means | |
7871 | it's now part of the public interface. | |
7872 | ||
7873 | c. Readline has a new variable, rl_readline_state, which is a bitmap that | |
7874 | encapsulates the current state of the library; intended for use by | |
7875 | callbacks and hook functions. | |
7876 | ||
7877 | ------------------------------------------------------------------------------ | |
bb70624e JA |
7878 | This document details the changes between this version, bash-2.04-release, |
7879 | and the previous version, bash-2.04-beta5. | |
7880 | ||
7881 | 1. Changes to Bash | |
7882 | ||
7883 | a. Better compile-time and configure-time checks for the necessity of | |
7884 | inet_aton(). | |
7885 | ||
7886 | b. A bug was fixed in the expansion of "${@:-}" when there are positional | |
7887 | parameters. | |
7888 | ||
7889 | c. A typo was fixed in the output of `complete'. | |
7890 | ||
7891 | d. The matches generated for a word by the `-W' argument to complete and | |
7892 | compgen are now matched against the word being completed, and only | |
7893 | matches are returned as the result. | |
7894 | ||
7895 | e. Some fixes were made for systems which do not restart read(2) when a | |
7896 | signal caught by bash is received. | |
7897 | ||
7898 | f. A bug was fixed which caused the umask to be set to 0 when an invalid | |
7899 | symbolic mode mask was parsed. | |
7900 | ||
7901 | g. Fixed a bug that could cause a core dump if a SIGCHLD was received while | |
7902 | performing an assignment statement using command substitution. | |
7903 | ||
7904 | h. Changed the word splitting function for programmable completion so cases | |
7905 | in which the cursor is between words are handled a bit better. | |
7906 | ||
7907 | 2. Changes to Readline | |
7908 | ||
7909 | a. rl_funmap_names() is now documented. | |
7910 | ||
7911 | 3. New Features in Bash | |
7912 | ||
7913 | a. The LC_NUMERIC variable is now treated specially, and used to set the | |
7914 | LC_NUMERIC locale category for number formatting, e.g., when `printf' | |
7915 | displays floating-point numbers. | |
7916 | ||
7917 | ------------------------------------------------------------------------------ | |
7918 | This document details the changes between this version, bash-2.04-beta5, | |
7919 | and the previous version, bash-2.04-beta4. | |
7920 | ||
7921 | 1. Changes to Bash | |
7922 | ||
7923 | a. A couple of changes were made to the Makefiles for easier building on | |
7924 | non-Unix systems. | |
7925 | ||
7926 | b. Fixed a bug where the current prompt would be set to $PS2 at startup. | |
7927 | ||
7928 | c. The shell script that tests an already-installed version was changed to | |
7929 | remove the directory it created its test programs in at exit. | |
7930 | ||
7931 | d. Several changes were made to the code that tokenizes an input line for | |
7932 | the programmable completion code. Shell metacharacters will now appear | |
7933 | as individual words in the word list passed to the completion functions. | |
7934 | Some of the example completion shell functions were changed to understand | |
7935 | redirection operators. | |
7936 | ||
7937 | e. A bug was fixed that, under obscure circumstances, could confuse the | |
7938 | parser when a shell function was run by the programmable completion code. | |
7939 | ||
7940 | f. A bug was fixed in the ulimit builtin for systems not using getrlimit(). | |
7941 | ||
7942 | g. The execution code now propagates the correct exit status back to the rest | |
7943 | of the code if the return value of a subshell command was being inverted. | |
7944 | Some new test cases for inverting return values with the `!' reserved | |
7945 | word have been added. | |
7946 | ||
7947 | h. Negative exponents in the arithmetic evaluation of v**e now return an | |
7948 | evaluation error. | |
7949 | ||
7950 | i. A bug that caused bash to check the wrong process in a pipeline for | |
7951 | abnormal termination (and consequently resetting the terminal attributes) | |
7952 | was fixed. | |
7953 | ||
7954 | j. Fixed a bug that caused $PS2 to be displayed after PROMPT_COMMAND was | |
7955 | executed. | |
7956 | ||
7957 | 2. Changes to Readline | |
7958 | ||
7959 | 1. Fixed a bug in a C preprocessor define that caused the keypad control | |
7960 | functions to be compiled out for all platforms except DJGPP. | |
7961 | ||
7962 | ------------------------------------------------------------------------------ | |
7963 | This document details the changes between this version, bash-2.04-beta4, | |
7964 | and the previous version, bash-2.04-beta3. | |
7965 | ||
7966 | 1. Changes to Bash | |
7967 | ||
7968 | a. A couple of changes were made to the redirection to attempt to avoid | |
7969 | race conditions and malicious file replacement. | |
7970 | ||
7971 | 2. A change was made to the string evaluation code (used for command | |
7972 | substitution, `eval', and the `.' builtin) to fix an obscure core | |
7973 | dump on alpha machines. | |
7974 | ||
7975 | 3. A bug that caused $LINENO to be wrong when executing arithmetic for | |
7976 | commands was fixed. | |
7977 | ||
7978 | 4. A couple of memory leaks in the programmable completion code were fixed. | |
7979 | ||
7980 | 5. A bug that could cause a core dump by freeing memory twice during a call | |
7981 | to `eval' if `set -u' had been enabled and an undefined variable was | |
7982 | referenced was fixed. | |
7983 | ||
7984 | ------------------------------------------------------------------------------ | |
7985 | This document details the changes between this version, bash-2.04-beta3, | |
7986 | and the previous version, bash-2.04-beta2. | |
7987 | ||
7988 | 1. Changes to Bash | |
7989 | ||
7990 | a. Bash should run the appropriate startup files when invoked by ssh2. | |
7991 | ||
7992 | b. Fixed a bug in the parsing of conditional commands that could cause a | |
7993 | core dump. | |
7994 | ||
7995 | c. Fixed a bug in parsing job specifications that occasionally caused | |
7996 | core dumps when an out-of-range job was referenced. | |
7997 | ||
7998 | d. Fixed the `type' and `command' builtins to do better reporting of | |
7999 | commands that are not found in $PATH or the hash table. | |
8000 | ||
8001 | e. Fixed a POSIX.2 compliance problem in the command builtin -- commands | |
8002 | are supposed to be reported as full pathnames. | |
8003 | ||
8004 | f. The `echo' builtin now returns failure if a write error occurs. | |
8005 | ||
8006 | g. Fixed a bug which caused the locale to not be reset correctly when | |
8007 | LC_ALL was unset. | |
8008 | ||
8009 | h. Changed description of `getopts' in man page and reference manual to make | |
8010 | it clear that option characters may be characters other than letters. | |
8011 | ||
8012 | i. If the shell exits while in a function, make sure that any trap on EXIT | |
8013 | doesn't think the function is still executing. | |
8014 | ||
8015 | j. Bashbug now tries harder to find a usable editor if $EDITOR is not set, | |
8016 | rather than simply defaulting to `emacs'. | |
8017 | ||
8018 | k. Changes to the scripts that guess and canonicalize the system type, from | |
8019 | the latest `automake' distribution via Debian. | |
8020 | ||
8021 | l. When using named pipes for process substitution, make sure the file | |
8022 | descriptors opened for reading are set to non-blocking mode. | |
8023 | ||
8024 | m. Fixed a bug that caused termination of pipelines that are killed by a | |
8025 | signal to not be reported in some cases. | |
8026 | ||
8027 | n. When not in literal-history mode, shell comment lines are not added to | |
8028 | the history list. | |
8029 | ||
8030 | o. When running in POSIX.2 mode, bash no longer performs word splitting on | |
8031 | the expanded value of the word supplied as the filename argument to | |
8032 | redirection operators. | |
8033 | ||
8034 | p. The prompt string decoding code now backslash-quotes only characters that | |
8035 | are special within double quotes when expanding the \w and \W escape | |
8036 | sequences. | |
8037 | ||
8038 | q. Fixed a bug in the prompt decoding code that could cause a non-interactive | |
8039 | shell to seg fault if `\u' was used in PS4 and the shell was in xtrace | |
8040 | mode. | |
8041 | ||
8042 | r. Fixed a bug that caused function definitions to be printed with any | |
8043 | redirections that should be attached to the entire function before the | |
8044 | closing brace. | |
8045 | ||
8046 | s. Changed the tilde expansion code for Cygwin systems to avoid creating | |
8047 | pathnames beginning with `//' if $HOME == `/'. | |
8048 | ||
8049 | t. Fixed a couple of autoconf tests to avoid creating files with fixed names | |
8050 | in /tmp. | |
8051 | ||
8052 | u. The `trap' and `kill' builtins now know the names of the POSIX.1b real- | |
8053 | time signals on systems which support them. | |
8054 | ||
8055 | 2. Changes to Readline | |
8056 | ||
8057 | a. Fixed a problem with the single-quote quoting function that could cause | |
8058 | buffer overflows. | |
8059 | ||
8060 | b. Fixed a bug that caused incorrect `stat characters' to be printed if | |
8061 | the files being completed were in the root directory and visible-stats | |
8062 | was enabled. | |
8063 | ||
8064 | 3. New Features in Bash | |
8065 | ||
8066 | a. There is a new `rbash.1' manual page, from the Debian release. | |
8067 | ||
8068 | b. The `--enable-usg-echo-default' option to `configure' has been renamed to | |
8069 | `--enable-xpg-echo-default'. The old option is still there for backwards | |
8070 | compatibility. | |
8071 | ||
8072 | ------------------------------------------------------------------------------ | |
8073 | This document details the changes between this version, bash-2.04-beta2, | |
8074 | and the previous version, bash-2.04-beta1. | |
8075 | ||
8076 | 1. Changes to Bash | |
8077 | ||
8078 | a. Fixed a bug that could cause pipes to be closed inappropriately in | |
8079 | some obscure cases. | |
8080 | ||
8081 | b. Fixed a bug that caused creation of the exported environment to clobber | |
8082 | the current command string if there were any exported shell functions. | |
8083 | ||
8084 | c. Some changes were made to reduce bash's memory usage. | |
8085 | ||
8086 | d. Fixed a problem with programmable completion and filenames to be | |
8087 | completed containing quote characters. | |
8088 | ||
8089 | e. Changed the code the removes named pipes created for the <(...) and >(...) | |
8090 | expansions to defer removal until after any current shell function has | |
8091 | finished executing. | |
8092 | ||
8093 | f. Fixed a bug in `select' which caused it to not handle the `continue' | |
8094 | builtin correctly. | |
8095 | ||
8096 | g. Autoconf tests added for cygwin32 and mingw32. | |
8097 | ||
8098 | 2. New Features in Bash | |
8099 | ||
8100 | a. The `--with-bash-malloc' configure option replaces `--with-gnu-malloc' | |
8101 | (which is still there for backwards compatibility). | |
8102 | ||
8103 | ------------------------------------------------------------------------------ | |
8104 | This document details the changes between this version, bash-2.04-beta1, | |
8105 | and the previous version, bash-2.04-alpha1. | |
8106 | ||
8107 | 1. Changes to Bash | |
8108 | ||
8109 | a. Fixed a bug in the programmable completion code that occurred when | |
8110 | trying to complete command lines containing a `;' or `@'. | |
8111 | ||
8112 | b. The file descriptor from which the shell is reading a script is now | |
8113 | moved to a file descriptor above the user-addressible range. | |
8114 | ||
8115 | c. Changes to `printf' so that it can handle integers beginning with 0 | |
8116 | or 0x as octal and hex, respectively. | |
8117 | ||
8118 | d. Fixes to the programmable completion code so it handles nonsense like | |
8119 | `compgen -C xyz' gracefully. | |
8120 | ||
8121 | e. The shell no longer modifies the signal handler for SIGPROF, allowing | |
8122 | profiling again on certain systems. | |
8123 | ||
8124 | f. The shell checks for a new window size, if the user has requested it, | |
8125 | after a process exits due to a signal. | |
8126 | ||
8127 | g. Fixed a bug with variables with null values in a program's temporary | |
8128 | environment and the bash getenv() replacement. | |
8129 | ||
8130 | h. `declare' and the other builtins that take variable assignments as | |
8131 | arguments now honor `set -a' and mark modified variables for export. | |
8132 | ||
8133 | i. Some changes were made for --dump-po-strings mode when writing strings | |
8134 | with embedded newlines. | |
8135 | ||
8136 | j. The code that caches export strings from the initial environment now | |
8137 | duplicates the string rather than just pointing into the environment. | |
8138 | ||
8139 | k. The filename completion quoting code now uses single quotes by default | |
8140 | if the filename being completed contains newlines, since \<newline> | |
8141 | has a special meaning to the parser. | |
8142 | ||
8143 | l. Bash now uses typedefs bits32_t and u_bits32_t instead of int32_t and | |
8144 | u_int32_t, respectively to avoid conflicts on certain Unix versions. | |
8145 | ||
8146 | m. Configuration changes were made for: Rhapsody, Mac OS, FreeBSD-3.x. | |
8147 | ||
8148 | n. Fixed a problem with hostname-to-ip-address translation in the | |
8149 | /dev/(tcp|udp)/hostname/port redirection code. | |
8150 | ||
8151 | o. The texinfo manual has been reorganized slightly. | |
8152 | ||
8153 | p. Filename generation (globbing) range comparisons in bracket expressions | |
8154 | no longer use strcoll(3) even if it is available, since it has unwanted | |
8155 | effects in certain locales. | |
8156 | ||
8157 | q. Fixed a cosmetic problem in the source that caused the shell to not | |
8158 | compile if DPAREN_ARITHMETIC was not defined but ARITH_FOR_COMMAND was. | |
8159 | ||
8160 | r. Fixed a bug in the here-document code tripped when the file descriptor | |
8161 | opened to the file containing the text of the here document was the | |
8162 | same as a redirector specified by the user. | |
8163 | ||
8164 | s. Fixed a bug where the INVERT_RETURN flag was not being set for `pipeline' | |
8165 | in `time ! pipeline'. | |
8166 | ||
8167 | t. Fixed a bug with the `wait' builtin which manifested itself when an | |
8168 | interrupt was received while the shell was waiting for asynchronous | |
8169 | processes in a shell script. | |
8170 | ||
8171 | u. Fixed the DEBUG trap code so that it has the correct value of $?. | |
8172 | ||
8173 | v. Fixed a bug in the parameter pattern substitution code that could cause | |
8174 | the shell to attempt to free unallocated memory if the pattern started | |
8175 | with `/' and an expansion error occurs. | |
8176 | ||
8177 | w. Fixed a bug in the positional parameter substring code that could | |
8178 | cause the shell to loop freeing freed memory. | |
8179 | ||
8180 | x. Fixed a bug in the positional parameter pattern substitution code so | |
8181 | that it correctly handles null replacement strings with a pattern | |
8182 | string prefixed with `%' or `#'. | |
8183 | ||
8184 | y. The shell no longer attempts to import functions from the environment if | |
8185 | started with `-n'. | |
8186 | ||
8187 | z. Fixed a bug that caused `return' in a command substitution executed in | |
8188 | a shell function to return from the function in a subshell and continue | |
8189 | execution. | |
8190 | ||
8191 | aa. `hash -p /pathname/with/slashes name' is no longer allowed when the shell | |
8192 | is restricted. | |
8193 | ||
8194 | bb. The wait* job control functions now behave better if called when there | |
8195 | are no unwaited-for children. | |
8196 | ||
8197 | cc. Command substitution no longer unconditionally disables job control in | |
8198 | the subshell started to run the command. | |
8199 | ||
8200 | dd. A bug was fixed that occasionally caused traps to mess up the parser | |
8201 | state. | |
8202 | ||
8203 | ee. `bashbug' now honors user headers in the mail message it sends. | |
8204 | ||
8205 | ff. A bug was fixed that caused the `:p' history modifier to not print the | |
8206 | history expansion if the `histverify' option was set. | |
8207 | ||
8208 | 2. Changes to Readline | |
8209 | ||
8210 | a. Fixed a bug in the redisplay code for lines with more than 256 line | |
8211 | breaks. | |
8212 | ||
8213 | b. A bug was fixed which caused invisible character markers to not be | |
8214 | stripped from the prompt string if the terminal was in no-echo mode. | |
8215 | ||
8216 | c. Readline no longer tries to get the variables it needs for redisplay | |
8217 | from the termcap entry if the calling application has specified its | |
8218 | own redisplay function. Readline treats the terminal as `dumb' in | |
8219 | this case. | |
8220 | ||
8221 | d. Fixes to the SIGWINCH code so that a multiple-line prompt with escape | |
8222 | sequences is redrawn correctly. | |
8223 | ||
8224 | 3. New Features in Bash | |
8225 | ||
8226 | a. `bashbug' now accepts `--help' and `--version' options. | |
8227 | ||
8228 | b. There is a new `xpg_echo' option to `shopt' that controls the behavior | |
8229 | of echo with respect to backslash-escaped characters at runtime. | |
8230 | ||
8231 | ------------------------------------------------------------------------------ | |
8232 | This document details the changes between this version, bash-2.04-alpha1, | |
8233 | and the previous version, bash-2.04-devel. | |
8234 | ||
8235 | 1. Changes to Bash | |
8236 | ||
8237 | a. Fixed a bug that could cause core dumps when performing substring | |
8238 | expansion. | |
8239 | ||
8240 | b. Shared object configuration changes for: Solaris, OSF/1 | |
8241 | ||
8242 | c. The POSIX_GLOB_LIBRARY code that uses the POSIX.2 globbing facilities | |
8243 | for pathname expansion now understands GLOBIGNORE. | |
8244 | ||
8245 | d. The code that implements `eval' was changed to save the value of the | |
8246 | current prompt, so an eval in a shell function called by the programmable | |
8247 | completion code will not change the prompt to $PS2. | |
8248 | ||
8249 | e. Restored the undocumented NON_INTERACTIVE_LOGIN_SHELLS #define to | |
8250 | config-top.h. If this is defined, all login shells will read the | |
8251 | startup files, not just interactive and non-interactive started with | |
8252 | the `--login' option. | |
8253 | ||
8254 | f. Fixed a bug that caused the expansion code to occasionally dump core if | |
8255 | IFS contained characters > 128. | |
8256 | ||
8257 | g. Fixed a problem with the grammar so that a newline is not required | |
8258 | after the `))' in the new-style arithmetic for statement; a semicolon | |
8259 | may be used as expected. | |
8260 | ||
8261 | h. Variable indirection may now reference the shell's special variables. | |
8262 | ||
8263 | i. The $'...' and $"..." constructs are now added to the history correctly | |
8264 | if they contain newlines and command-oriented history is enabled. | |
8265 | ||
8266 | j. It is now an error to try to assign a value to a function-local copy | |
8267 | of a readonly shell variable (declared with the `local' builtin). | |
8268 | ||
8269 | 2. Changes to Readline | |
8270 | ||
8271 | a. The history file code now uses O_BINARY mode when reading and writing | |
8272 | the history file on cygwin32. | |
8273 | ||
8274 | 3. New Features in Bash | |
8275 | ||
8276 | a. A new programmable completion facility, with two new builtin commands: | |
8277 | complete and compgen. | |
8278 | ||
8279 | b. configure has a new option, `--enable-progcomp', to compile in the | |
8280 | programmable completion features (enabled by default). | |
8281 | ||
8282 | c. `shopt' has a new option, `progcomp', to enable and disable programmable | |
8283 | completion at runtime. | |
8284 | ||
8285 | d. Unsetting HOSTFILE now clears the list of hostnames used for completion. | |
8286 | ||
8287 | 4. New Features in Readline | |
8288 | ||
8289 | a. A new variable, rl_gnu_readline_p, always 1. The intent is that an | |
8290 | application can verify whether or not it is linked with the `real' | |
8291 | readline library or some substitute. | |
8292 | ||
8293 | ------------------------------------------------------------------------------ | |
8294 | This document details the changes between this version, bash-2.04-devel, | |
8295 | and the previous version, bash-2.03-release. | |
8296 | ||
8297 | 1. Changes to Bash | |
8298 | ||
8299 | a. System-specific configuration and source changes for: Interix, Rhapsody | |
8300 | ||
8301 | b. Fixed a bug in execute_cmd.c that resulted in a compile-time error if | |
8302 | JOB_CONTROL was not defined. | |
8303 | ||
8304 | c. An obscure race condition in the trap code was fixed. | |
8305 | ||
8306 | d. The string resulting from $'...' is now requoted to avoid any further | |
8307 | expansion. | |
8308 | ||
8309 | e. The $'...' quoting syntax now allows backslash to escape a single quote, | |
8310 | for ksh-93 compatibility. | |
8311 | ||
8312 | f. The $"..." quoting syntax now escapes backslashes and double quotes in | |
8313 | the translated string when displaying them with the --dump-po-strings | |
8314 | option. | |
8315 | ||
8316 | g. `echo -e' no longer converts \' to '. | |
8317 | ||
8318 | h. Fixes were made to the extended globbing code to handle embedded (...) | |
8319 | patterns better. | |
8320 | ||
8321 | i. Some improvements were made to the code that unsets `nodelay' mode on | |
8322 | the file descriptor from which bash is reading input. | |
8323 | ||
8324 | j. Some changes were made to the replacement termcap library for better | |
8325 | operation on MS-DOS. | |
8326 | ||
8327 | k. Some changes were made to the tilde expansion code to handle backslash | |
8328 | as a pathname separator on MS-DOS. | |
8329 | ||
8330 | l. The source has been reorganized a little bit -- there is now an `include' | |
8331 | subdirectory, and lib/posixheaders has been removed. | |
8332 | ||
8333 | m. Improvements were made to the `read' builtin so that it makes many | |
8334 | fewer read(2) system calls. | |
8335 | ||
8336 | n. The expansion of $- will include `c' and `s' when those options are | |
8337 | supplied at shell invocation. | |
8338 | ||
8868edaf | 8339 | o. Several improvements were made to the completion code: variable completion |
bb70624e JA |
8340 | now works better when there are unterminated expansions, command |
8341 | completion understands quotes better, and completion now works in certain | |
8342 | unclosed $(... constructs. | |
8343 | ||
8344 | p. The arithmetic expansion code was fixed to not need the value of a | |
8345 | variable being assigned a value (fixes the "ss=09; let ss=10" bug). | |
8346 | ||
8347 | q. Some changes were made to make exported environment creation faster. | |
8348 | ||
8349 | r. The html documentation will be installed into $(htmldir) if that variable | |
8350 | has a value when `make install' is run. | |
8351 | ||
8352 | s. Fixed a bug that would cause the bashrc file to be sourced inappropriately | |
8353 | when bash is started by sshd. | |
8354 | ||
8355 | t. The SSH_CLIENT environment variable is no longer auto-exported. | |
8356 | ||
8357 | u. A bug that caused redirections with (...) subshells to be performed in | |
8358 | the wrong order was fixed. | |
8359 | ||
28ef6c31 | 8360 | v. A bug that occasionally caused inappropriate expansion of assignment |
bb70624e JA |
8361 | statements in compound array assignments was fixed. |
8362 | ||
8363 | w. The code that parses the words in a compound array assignment was | |
8364 | simplified considerably and should work better now. | |
8365 | ||
8366 | x. Fixes to the non-job-control code in nojobs.c to make it POSIX.2-compliant | |
8367 | when a user attempts to retrieve the status of a terminated background | |
8368 | process. | |
8369 | ||
8370 | y. Fixes to the `printf' builtin so that it doesn't try to expand all | |
8371 | backslash escape sequences in the format string before parsing it for | |
8372 | % format specifiers. | |
8373 | ||
8374 | 2. Changes to Readline | |
8375 | ||
8376 | a. The history library tries to truncate the history file only if it is a | |
8377 | regular file. | |
8378 | ||
8379 | b. A bug that caused _rl_dispatch to address negative array indices on | |
8380 | systems with signed chars was fixed. | |
8381 | ||
8382 | c. rl-yank-nth-arg now leaves the history position the same as when it was | |
8383 | called. | |
8384 | ||
8385 | d. Changes to the completion code to handle MS-DOS drive-letter:pathname | |
8386 | filenames. | |
8387 | ||
8388 | e. Completion is now case-insensitive by default on MS-DOS. | |
8389 | ||
8390 | f. Fixes to the history file manipulation code for MS-DOS. | |
8391 | ||
8392 | g. Readline attempts to bind the arrow keys to appropriate defaults on MS-DOS. | |
8393 | ||
8394 | h. Some fixes were made to the redisplay code for better operation on MS-DOS. | |
8395 | ||
8396 | i. The quoted-insert code will now insert tty special chars like ^C. | |
8397 | ||
8398 | j. A bug was fixed that caused the display code to reference memory before | |
8399 | the start of the prompt string. | |
8400 | ||
8401 | k. More support for __EMX__ (OS/2). | |
8402 | ||
8403 | l. A bug was fixed in readline's signal handling that could cause infinite | |
8404 | recursion in signal handlers. | |
8405 | ||
8406 | m. A bug was fixed that caused the point to be less than zero when rl_forward | |
8407 | was given a very large numeric argument. | |
8408 | ||
8409 | n. The vi-mode code now gets characters via the application-settable value | |
8410 | of rl_getc_function rather than calling rl_getc directly. | |
8411 | ||
8412 | 3. New Features in Bash | |
8413 | ||
8414 | a. The history builtin has a `-d offset' option to delete the history entry | |
8415 | at position `offset'. | |
8416 | ||
8417 | b. The prompt expansion code has two new escape sequences: \j, the number of | |
8418 | active jobs; and \l, the basename of the shell's tty device name. | |
8419 | ||
8420 | c. The `bind' builtin has a new `-x' option to bind key sequences to shell | |
8421 | commands. | |
8422 | ||
8423 | d. There is a new shell option, no_empty_command_completion, which, when | |
8424 | enabled, disables command completion when TAB is typed on an empty line. | |
8425 | ||
8426 | e. The `help' builtin has a `-s' option to just print a builtin's usage | |
8868edaf | 8427 | synopsis. |
bb70624e JA |
8428 | |
8429 | f. There are several new arithmetic operators: id++, id-- (variable | |
8430 | post-increment/decrement), ++id, --id (variabl pre-increment/decrement), | |
8431 | expr1 , expr2 (comma operator). | |
8432 | ||
8433 | g. There is a new ksh-93 style arithmetic for command: | |
8434 | for ((expr1 ; expr2; expr3 )); do list; done | |
8435 | ||
8436 | h. The `read' builtin has a number of new options: | |
8437 | -t timeout only wait timeout seconds for input | |
8438 | -n nchars only read nchars from input instead of a full line | |
8439 | -d delim read until delim rather than newline | |
8440 | -s don't echo input chars as they are read | |
8441 | ||
8442 | i. The redirection code now handles several filenames specially: | |
8443 | /dev/fd/N, /dev/stdin, /dev/stdout, and /dev/stderr, whether or | |
8444 | not they are present in the file system. | |
8445 | ||
8446 | j. The redirection code now recognizes pathnames of the form | |
8447 | /dev/tcp/host/port and /dev/udp/host/port, and tries to open a socket | |
8448 | of the appropriate type to the specified port on the specified host. | |
8449 | ||
8450 | k. The ksh-93 ${!prefix*} expansion, which expands to the names of all | |
8451 | shell variables whose names start with prefix, has been implemented. | |
8452 | ||
8453 | l. There is a new dynamic variable, FUNCNAME, which expands to the name of | |
8454 | a currently-executing function. Assignments to FUNCNAME have no effect. | |
8455 | ||
8456 | m. The GROUPS variable is no longer readonly; assignments to it are silently | |
8457 | discarded. This means it can be unset. | |
8458 | ||
8459 | 4. New Features in Readline | |
8460 | ||
8461 | a. Parentheses matching is now always compiled into readline, and enabled | |
8462 | or disabled when the value of the `blink-matching-paren' variable is | |
8463 | changed. | |
8464 | ||
8465 | b. MS-DOS systems now use ~/_inputrc as the last-ditch inputrc filename. | |
8466 | ||
8467 | c. MS-DOS systems now use ~/_history as the default history file. | |
8468 | ||
8469 | d. history-search-{forward,backward} now leave the point at the end of the | |
8470 | line when the string to search for is empty, like | |
8471 | {reverse,forward}-search-history. | |
8472 | ||
8473 | e. history-search-{forward,backward} now leave the last history line found | |
8474 | in the readline buffer if the second or subsequent search fails. | |
8475 | ||
8476 | f. New function for use by applications: rl_on_new_line_with_prompt, used | |
8477 | when an application displays the prompt itself before calling readline(). | |
8478 | ||
8479 | g. New variable for use by applications: rl_already_prompted. An application | |
8480 | that displays the prompt itself before calling readline() must set this to | |
8481 | a non-zero value. | |
8482 | ||
8483 | ------------------------------------------------------------------------------ | |
b72432fd JA |
8484 | This document details the changes between this version, bash-2.03-release, |
8485 | and the previous version, bash-2.03-beta2. | |
8486 | ||
8487 | 1. Changes to Bash | |
8488 | ||
8489 | a. A file descriptor leak in the `fc' builtin was fixed. | |
8490 | ||
8491 | b. A bug was fixed in the `read' builtin that caused occasional spurious | |
8492 | failures when using `read -e'. | |
8493 | ||
8494 | c. The version code needed to use the value of the cpp variable | |
8495 | CONF_MACHTYPE rather than MACHTYPE. | |
8496 | ||
8497 | d. A new test was added to exercise the command printing and copying code. | |
8498 | ||
8499 | e. A bug was fixed that caused `time' to be recognized as a reserved word | |
8500 | if it was the first pattern in a `case' statement pattern list. | |
8501 | ||
8502 | ------------------------------------------------------------------------------ | |
8503 | This document details the changes between this version, bash-2.03-beta2, | |
8504 | and the previous version, bash-2.03-beta1. | |
8505 | ||
8506 | 1. Changes to Bash | |
8507 | ||
8508 | a. Slight additions to support/shobj-conf, mostly for the benefit of AIX 4.2. | |
8509 | ||
8510 | b. config.{guess,sub} support added for the NEC SX4. | |
8511 | ||
8512 | c. Changed some of the cross-compiling sections of the configure macros in | |
8513 | aclocal.m4 so that configure won't abort. | |
8514 | ||
8515 | d. Slight changes to how the HTML versions of the bash and readline manuals | |
8516 | are generated. | |
8517 | ||
8518 | e. Fixed conditional command printing to avoid interpreting printf `%'-escapes | |
8519 | in arguments to [[. | |
8520 | ||
8521 | f. Don't include the bash malloc on all variants of the alpha processor. | |
8522 | ||
8523 | g. Changes to configure to make --enable-profiling work on Solaris 2.x. | |
8524 | ||
8525 | h. Fixed a bug that manifested itself when shell functions were called | |
8526 | between calls to `getopts'. | |
8527 | ||
8528 | i. Fixed pattern substitution so that a bare `#'as a pattern causes the | |
8529 | replacement string to be prefixed to the search string, and a bare | |
8530 | `%' causes the replacement string to be appended to the search string. | |
8531 | ||
8532 | j. Fixed a bug in the command execution code that caused child processes | |
8533 | to occasionally have the wrong value for $!. | |
8534 | ||
8535 | 2. Changes to Readline | |
8536 | ||
8537 | a. Added code to the history library to catch history substitutions using | |
8538 | `&' without a previous history substitution or search having been | |
8539 | performed. | |
8540 | ||
8541 | 3. New Features in Bash | |
8542 | ||
8543 | 4. New Features in Readline | |
8544 | ||
8545 | a. New bindable variable: `isearch-terminators'. | |
8546 | ||
8547 | b. New bindable function: `forward-backward-delete-char' (unbound by default). | |
8548 | ||
8549 | ------------------------------------------------------------------------------ | |
8550 | This document details the changes between this version, bash-2.03-beta1, | |
8551 | and the previous version, bash-2.03-alpha. | |
8552 | ||
8553 | 1. Changes to Bash | |
8554 | ||
8555 | a. A change was made to the help text for `{...}' to make it clear that a | |
8556 | semicolon is required before the closing brace. | |
8557 | ||
8558 | b. A fix was made to the `test' builtin so that syntax errors cause test | |
8559 | to return an exit status > 1. | |
8560 | ||
8561 | c. Globbing is no longer performed on assignment statements that appear as | |
8562 | arguments to `assignment builtins' such as `export'. | |
8563 | ||
8564 | d. System-specific configuration changes were made for: Rhapsody, | |
8565 | AIX 4.2/gcc, BSD/OS 4.0. | |
8566 | ||
8567 | e. New loadable builtins: ln, unlink. | |
8568 | ||
8569 | f. Some fixes were made to the globbing code to handle extended glob patterns | |
8570 | which immediately follow a `*'. | |
8571 | ||
8572 | g. A fix was made to the command printing code to ensure that redirections | |
8573 | following compound commands have a space separating them from the rest | |
8574 | of the command. | |
8575 | ||
8576 | h. The pathname canonicalization code was changed to produce fewer leading | |
8577 | `//' sequences, since those are interpreted as network file system | |
8578 | pathnames on some systems. | |
8579 | ||
8580 | i. A fix was made so that loops containing `eval' commands in commands passed | |
8581 | to `bash -c' would not exit prematurely. | |
8582 | ||
8583 | j. Some changes were made to the job reaping code when the shell is not | |
8584 | interactive, so the shell will retain exit statuses longer for examination | |
8585 | by `wait'. | |
8586 | ||
8587 | k. A fix was made so that `jobs | command' works again. | |
8588 | ||
8589 | l. The erroneous compound array assignment var=((...)) is now a syntax error. | |
8590 | ||
8591 | m. A change was made to the dynamic loading code in `enable' to support | |
8592 | Tenon's MachTen. | |
8593 | ||
8594 | n. A fix was made to the globbing code so that extended globbing patterns | |
8595 | will correctly match `.' in a bracket expression. | |
8596 | ||
8597 | 2. Changes to Readline | |
8598 | ||
8599 | a. A fix was made to the completion code in which a typo caused the wrong | |
8600 | value to be passed to the function that computed the longest common | |
8601 | prefix of the list of matches. | |
8602 | ||
8603 | b. The completion code now checks the value of rl_filename_completion_desired, | |
8604 | which is set by application-supplied completion functions to indicate | |
8605 | that filename completion is being performed, to decide whether or not to | |
8606 | call an application-supplied `ignore completions' function. | |
8607 | ||
8608 | 3. New Features in Bash | |
8609 | ||
8610 | a. A change was made to the startup file code so that any shell begun with | |
8611 | the `--login' option, even non-interactive shells, will source the login | |
8612 | shell startup files. | |
8613 | ||
8614 | 4. New Features in Readline | |
8615 | ||
8616 | a. A new variable, rl_erase_empty_line, which, if set by an application using | |
8617 | readline, will cause readline to erase, prompt and all, lines on which the | |
8618 | only thing typed was a newline. | |
8619 | ||
8620 | ------------------------------------------------------------------------------ | |
8621 | This document details the changes between this version, bash-2.03-alpha, | |
8622 | and the previous version, bash-2.02.1-release. | |
8623 | ||
8624 | 1. Changes to Bash | |
8625 | ||
8626 | a. System-specific configuration changes were made for: Irix 6.x, Unixware 7. | |
8627 | ||
8628 | b. The texi2dvi and texi2html scripts were updated to the latest versions | |
8629 | from the net. | |
8630 | ||
8631 | c. The configure tests that determine which native type is 32 bits were | |
8632 | changed to not require a compiled program. | |
8633 | ||
8634 | d. Fixed a bug in shell_execve that could cause memory to be freed twice | |
8635 | after a failed exec. | |
8636 | ||
8637 | e. The `printf' test uses `diff -a' if it's available to prevent confusion | |
8638 | due to the non-ascii output. | |
8639 | ||
8640 | f. Shared object configuration is now performed by a shell script, | |
8641 | support/shobj-conf, which generates values to be substituted into | |
8642 | makefiles by configure. | |
8643 | ||
8644 | g. Some changes were made to `ulimit' to avoid the use of RLIM_INVALID as a | |
8645 | return value. | |
8646 | ||
8647 | h. Changes were made to `ulimit' to work around HPUX 9.x's peculiar | |
8648 | handling of RLIMIT_FILESIZE. | |
8649 | ||
8650 | i. Some new loadable builtins were added: id, printenv, sync, whoami, push, | |
8651 | mkdir. `pushd', `popd', and `dirs' can now be built as regular or | |
8652 | loadable builtins from the same source file. | |
8653 | ||
8654 | j. Changes were made to `printf' to handle NUL bytes in the expanded format | |
8655 | string. | |
8656 | ||
8657 | k. The various `make clean' Makefile targets now descend into lib/sh. | |
8658 | ||
8659 | l. The `type' builtin was changed to use the internal `getopt' so that things | |
8660 | like `type -ap' work as expected. | |
8661 | ||
8662 | m. There is a new configuration option, --with-installed-readline, to link | |
8663 | bash with a locally-installed version of readline. Only readline version | |
8664 | 4.0 and later releases can support this. Shared and static libraries | |
8665 | are supported. The installed include files are used. | |
8666 | ||
8667 | n. There is a new autoconf macro used to find which basic type is 64 bits. | |
8668 | ||
8669 | o. Dynamic linking and loadable builtins should now work on SCO 3.2v5*, | |
8670 | AIX 4.2 with gcc, Unixware 7, and many other systems using gcc, where | |
8671 | the `-shared' options works correctly. | |
8672 | ||
8673 | p. A bug was fixed in the bash filename completion code that caused memory to | |
8674 | be freed twice if a directory name containing an unset variable was | |
8675 | completed and the -u option was set. | |
8676 | ||
8677 | q. The prompt expansion code now quotes the `$' in the `\$' expansion so it | |
8678 | is not processed by subsequent parameter expansion. | |
8679 | ||
8680 | r. Fixed a parsing bug that caused a single or double quote after a `$$' to | |
8681 | trigger ANSI C expansion or locale translation. | |
8682 | ||
8683 | s. Fixed a bug in the globbing code that caused quoted filenames containing | |
8684 | no globbing characters to sometimes be incorrectly expanded. | |
8685 | ||
8686 | t. Changes to the default prompt strings if prompt string decoding is not | |
8687 | compiled into the shell. | |
8688 | ||
8689 | u. Added `do', `then', `else', `{', and `(' to the list of keywords that may | |
8690 | precede the `time' reserved word. | |
8691 | ||
8692 | v. The shell may now be cross-built for BeOS as well as cygwin32. | |
8693 | ||
8694 | w. The conditional command execution code now treats `=' the same as `==' | |
8695 | for deciding when to perform pattern matching. | |
8696 | ||
8697 | x. The `-e' option no longer causes the shell to exit if a command exits | |
8698 | with a non-zero status while running the startup files. | |
8699 | ||
8700 | y. The `printf' builtin no longer dumps core if a modifier is supplied in | |
8701 | the format string without a conversion character (e.g. `%h'). | |
8702 | ||
8703 | z. Array assignments of the form a=(...) no longer show up in the history | |
8704 | list. | |
8705 | ||
8706 | aa. The parser was fixed to obey the POSIX.2 rules for finding the closing | |
8707 | `}' in a ${...} expression. | |
8708 | ||
8709 | bb. The history file is now opened with mode 0600 rather than 0666, so bash | |
8710 | no longer relies on the user's umask being set appropriately. | |
8711 | ||
8712 | cc. Setting LANG no longer causes LC_ALL to be assigned a value; bash now | |
8713 | relies on proper behavior from the C library. | |
8714 | ||
8715 | dd. Minor changes were made to allow quoted variable expansions using | |
8716 | ${...} to be completed correctly if there is no closing `"'. | |
8717 | ||
8718 | ee. Changes were made to builtins/Makefile.in so that configuring the shell | |
8719 | with `--enable-profiling' works right and builtins/mkbuiltins is | |
8720 | generated. | |
8721 | ||
8722 | 2. Changes to Readline | |
8723 | ||
8724 | a. The version number is now 4.0. | |
8725 | ||
8726 | b. There is no longer any #ifdef SHELL code in the source files. | |
8727 | ||
8728 | c. Some changes were made to the key binding code to fix memory leaks and | |
8729 | better support Win32 systems. | |
8730 | ||
8731 | d. Fixed a silly typo in the paren matching code -- it's microseconds, not | |
8732 | milliseconds. | |
8733 | ||
8734 | e. The readline library should be compilable by C++ compilers. | |
8735 | ||
8736 | f. The readline.h public header file now includes function prototypes for | |
8737 | all readline functions, and some changes were made to fix errors in the | |
8738 | source files uncovered by the use of prototypes. | |
8739 | ||
8740 | g. The maximum numeric argument is now clamped at 1000000. | |
8741 | ||
8742 | h. Fixes to rl_yank_last_arg to make it behave better. | |
8743 | ||
8744 | i. Fixed a bug in the display code that caused core dumps if the prompt | |
8745 | string length exceeded 1024 characters. | |
8746 | ||
8747 | j. The menu completion code was fixed to properly insert a single completion | |
8748 | if there is only one match. | |
8749 | ||
8750 | k. A bug was fixed that caused the display code to improperly display tabs | |
8751 | after newlines. | |
8752 | ||
8753 | 3. New Features in Bash | |
8754 | ||
8755 | a. New `shopt' option, `restricted_shell', indicating whether or not the | |
8756 | shell was started in restricted mode, for use in startup files. | |
8757 | ||
8758 | b. Filename generation is now performed on the words between ( and ) in | |
8759 | array assignments (which it probably should have done all along). | |
8760 | ||
8761 | c. OLDPWD is now auto-exported, as POSIX.2 seems to require. | |
8762 | ||
8763 | d. ENV and BASH_ENV are read-only variables in a restricted shell. | |
8764 | ||
8765 | 4. New Features in Readline | |
8766 | ||
8767 | a. Many changes to the signal handling: | |
8768 | o Readline now catches SIGQUIT and cleans up the tty before returning; | |
8769 | o A new variable, rl_catch_signals, is available to application writers | |
8770 | to indicate to readline whether or not it should install its own | |
8771 | signal handlers for SIGINT, SIGTERM, SIGQUIT, SIGALRM, SIGTSTP, | |
8772 | SIGTTIN, and SIGTTOU; | |
8773 | o A new variable, rl_catch_sigwinch, is available to application | |
8774 | writers to indicate to readline whether or not it should install its | |
8775 | own signal handler for SIGWINCH, which will chain to the calling | |
8776 | applications's SIGWINCH handler, if one is installed; | |
8777 | o There is a new function, rl_free_line_state, for application signal | |
8778 | handlers to call to free up the state associated with the current | |
8779 | line after receiving a signal; | |
8780 | o There is a new function, rl_cleanup_after_signal, to clean up the | |
8781 | display and terminal state after receiving a signal; | |
8782 | o There is a new function, rl_reset_after_signal, to reinitialize the | |
8783 | terminal and display state after an application signal handler | |
8784 | returns and readline continues | |
8785 | ||
8786 | b. There is a new function, rl_resize_terminal, to reset readline's idea of | |
8787 | the screen size after a SIGWINCH. | |
8788 | ||
8789 | c. New public functions: rl_save_prompt and rl_restore_prompt. These were | |
8790 | previously private functions with a `_' prefix. | |
8791 | ||
8792 | d. New function hook: rl_pre_input_hook, called just before readline starts | |
8793 | reading input, after initialization. | |
8794 | ||
8795 | e. New function hook: rl_display_matches_hook, called when readline would | |
8796 | display the list of completion matches. The new function | |
8797 | rl_display_match_list is what readline uses internally, and is available | |
8798 | for use by application functions called via this hook. | |
8799 | ||
8800 | f. New bindable function, delete-char-or-list, like tcsh. | |
8801 | ||
8802 | ------------------------------------------------------------------------------ | |
bc4cd23c JA |
8803 | This document details the changes between this version, bash-2.02.1-release, |
8804 | and the previous version, bash-2.02-release. | |
8805 | ||
8806 | 1. Changes to Bash | |
8807 | ||
8808 | a. A bug that caused the bash readline support to not compile unless aliases | |
8809 | and csh-style history were configured into the shell was fixed. | |
8810 | ||
8811 | b. Fixed a bug that could cause a core dump when here documents contained | |
8812 | more than 1000 characters. | |
8813 | ||
8814 | c. Fixed a bug that caused a CDPATH entry of "" to not be treated the same | |
8815 | as the current directory when in POSIX mode. | |
8816 | ||
8817 | d. Fixed an alignment problem with the memory returned by the bash malloc, | |
8818 | so returned memory is now 64-bit aligned. | |
8819 | ||
8820 | e. Fixed a bug that caused command substitutions executed within pipelines | |
8821 | to put the terminal in the wrong process group. | |
8822 | ||
8823 | f. Fixes to support/config.sub for: alphas, SCO Open Server and Open Desktop, | |
8824 | Unixware 2, and Unixware 7. | |
8825 | ||
8826 | g. Fixes to the pattern matching code to make it work correctly for eight-bit | |
8827 | characters. | |
8828 | ||
8829 | h. Fixed a problem that occasionally caused the shell to display the wrong | |
8830 | value for the new working directory when changing to a directory found | |
8831 | in $CDPATH when in physical mode. | |
8832 | ||
8833 | i. Fixed a bug that caused core dumps when using conditional commands in | |
8834 | shell functions. | |
8835 | ||
8836 | j. Fixed a bug that caused the printf builtin to loop forever if the format | |
8837 | string did not consume any of the arguments. | |
8838 | ||
8839 | k. Fixed a bug in the parameter expansion code that caused "$@" to be | |
8840 | incorrectly split if $IFS did not contain a space character. | |
8841 | ||
8842 | l. Fixed a bug that could cause a core dump when completing hostnames if | |
8843 | the number of matching hostnames was an exact multiple of 16. | |
8844 | ||
8845 | m. Fixed a bug that caused the shell to fork too early when a command | |
8846 | such as `%2 &' was given. | |
8847 | ||
8848 | 2. Changes to Readline | |
8849 | ||
8850 | a. Fixed a problem with redisplay that showed up when the prompt string was | |
8851 | longer than the screen width and the prompt contained invisible characters. | |
8852 | ||
8853 | ------------------------------------------------------------------------------ | |
8854 | This document details the changes between this version, bash-2.02-release, | |
8855 | and the previous version, bash-2.02-beta2. | |
cce855bc JA |
8856 | |
8857 | 1. Changes to Bash | |
8858 | ||
8859 | a. A bug was fixed that caused the terminal process group to be set | |
8860 | incorrectly when performing command substitution of builtins in a | |
8861 | pipeline. | |
8862 | ||
8863 | ------------------------------------------------------------------------------ | |
8864 | This document details the changes between this version, bash-2.02-beta2, | |
8865 | and the previous version, bash-2.02-beta1. | |
8866 | ||
8867 | 1. Changes to Bash | |
8868 | ||
8869 | a. Attempting to `wait' for stopped jobs now generates a warning message. | |
8870 | ||
8871 | b. Pipelines which exit due to SIGPIPE in non-interactive shells are now | |
8872 | not reported if the shell is compiled -DDONT_REPORT_SIGPIPE. | |
8873 | ||
8874 | c. Some changes were made to builtins/psize.sh and support/bashbug.sh to | |
8875 | attempt to avoid some /tmp file races and surreptitious file | |
8876 | substitutions. | |
8877 | ||
8878 | d. Fixed a bug that caused the shell not to compile if configured with | |
8879 | dparen arithmetic but without aliases. | |
8880 | ||
8881 | e. Fixed a bug that caused the input stream to be switched when assigning | |
8882 | empty arrays with `bash -c'. | |
8883 | ||
8884 | f. A bug was fixed in the readline expansion glue code that caused bash to | |
8885 | dump core when expanding lines with an unclosed single quote. | |
8886 | ||
8887 | g. A fix was made to the `cd' builtin so that using a non-empty directory | |
8888 | from $CDPATH results in an absolute pathname of the new current working | |
8889 | directory to be displayed after the current directory is changed. | |
8890 | ||
8891 | h. Fixed a bug in the variable assignment code that caused the shell to | |
8892 | dump core when referencing an unset variable with `set -u' enabled in | |
8893 | an assignment statement preceding a command. | |
8894 | ||
8895 | i. Fixed a bug in the exit trap code that caused reserved words to not be | |
8896 | recognized under certain circumstances. | |
8897 | ||
8898 | j. Fixed a bug in the parameter pattern substitution code so that quote | |
8899 | removal is performed. | |
8900 | ||
8901 | k. The shell should now configure correctly on Apple Rhapsody systems. | |
8902 | ||
8903 | l. The `kill' builtin now prints a usage message if it is not passed any | |
8904 | arguments. | |
8905 | ||
8906 | ------------------------------------------------------------------------------ | |
8907 | This document details the changes between this version, bash-2.02-beta1, | |
8908 | and the previous version, bash-2.02-alpha1. | |
8909 | ||
8910 | 1. Changes to Bash | |
8911 | ||
8912 | a. A few compilation bugs were fixed in the new extended globbing code. | |
8913 | ||
8914 | b. Executing arithmetic commands now sets the command name to `((' so | |
8915 | error messages look right. | |
8916 | ||
8917 | c. Fixed some build problems with various configuration options. | |
8918 | ||
8919 | d. The `printf' builtin now aborts immediately if an illegal format | |
8920 | character is encountered. | |
8921 | ||
8922 | e. The code that creates here-documents now behaves better if the file it's | |
8923 | trying to create already exists for some reason. | |
8924 | ||
8925 | f. Fixed a problem with the extended globbing code that made patterns like | |
8926 | `x+*' expand incorrectly. | |
8927 | ||
8928 | g. The prompt string expansion code no longer quotes tildes with backslashes. | |
8929 | ||
8930 | h. The bash getcwd() implementation in lib/sh/getcwd.c now behaves better in | |
8931 | the presence of lstat(2) failures. | |
8932 | ||
8933 | i. Fixed a bug with strsub() that caused core dumps when executing `fc -s'. | |
8934 | ||
8935 | j. The mail checking code now ensures that it has a valid default mailpath. | |
8936 | ||
8937 | k. A bug was fixed that caused local variables to be unset inappropriately | |
8938 | when sourcing a script from within another sourced script. | |
8939 | ||
8940 | l. A bug was fixed in the history saving code so that functions are saved | |
8941 | in the history list correctly if `cmdhist' is enabled, but `lithist' | |
8942 | is not. | |
8943 | ||
8944 | m. A bug was fixed that caused printf overflows when displaying error | |
8945 | messages. | |
8946 | ||
8947 | n. It should be easier to build the loadble builtins in examples/loadables, | |
8948 | though some manual editing of the generated Makefile is still required. | |
8949 | ||
8950 | o. The user's primary group is now always ${GROUPS[0]}. | |
8951 | ||
8952 | p. Some updates were made to support/config.guess from the GNU master copy. | |
8953 | ||
8954 | q. Some changes were made to the autoconf support for Solaris 2.6 large | |
8955 | files. | |
8956 | ||
8957 | r. The `command' builtins now does the right thing when confstr(3) cannot | |
8958 | find a value for _CS_PATH. | |
8959 | ||
8960 | s. Extended globbing expressions like `*.!(c)' are not history expanded if | |
8961 | `extglob' is enabled. | |
8962 | ||
8963 | t. Using the `-P' option to `cd' will force the value that is assigned to | |
8964 | PWD to not contain any symbolic links. | |
8965 | ||
8966 | 2. Changes to Readline | |
8967 | ||
8968 | a. The code that prints completion listings now behaves better if one or | |
8969 | more of the filenames contains non-printable characters. | |
8970 | ||
8971 | b. The time delay when showing matching parentheses is now 0.5 seconds. | |
8972 | ||
8973 | ------------------------------------------------------------------------------ | |
8974 | This document details the changes between this version, bash-2.02-alpha1, | |
8975 | and the previous version, bash-2.01.1-release. | |
8976 | ||
8977 | 1. Changes to Bash | |
8978 | ||
8979 | a. OS-specific configuration changes for: BSD/OS 3.x, Minix 2.x, | |
8980 | Solaris 2.6, SINIX SVR4. | |
8981 | ||
8982 | b. Changes were made to the generated `info' files so that `install-info' | |
8983 | works correctly. | |
8984 | ||
8985 | c. PWD is now auto-exported. | |
8986 | ||
8987 | d. A fix was made to the pipeline code to make sure that the shell forks | |
8988 | to execute simple commands consisting solely of assignment statements. | |
8989 | ||
8990 | e. Changes to the test suite for systems with 14-character filenames. | |
8991 | ||
8992 | f. The default sizes of some internal hash tables have been made smaller | |
8993 | to reduce the shell's memory footprint. | |
8994 | ||
8995 | g. The `((...))' arithmetic command is now executed directly instead of | |
8996 | being translated into `let "..."'. | |
8997 | ||
8998 | h. Fixes were made to the expansion code so that "$*", "$@", "${array[@]}", | |
8999 | and "${array[@]}" expand correctly when IFS does not contain a space | |
9000 | character, is unset, or is set to NULL. | |
9001 | ||
9002 | i. The indirect expansion code (${!var}) was changed so that the only | |
9003 | valid values of `var' are variable names, positional parameters, `#', | |
9004 | `@', and `*'. | |
9005 | ||
9006 | j. An arithmetic expression error in a $((...)) expansion now causes a | |
9007 | non-interactive shell running in posix mode to exit. | |
9008 | ||
9009 | k. Compound array assignment now splits the words within the parentheses | |
9010 | on shell metacharacters like the parser would before expansing them | |
9011 | and performing the assignment. This is for compatibility with ksh-93. | |
9012 | ||
9013 | l. The internal shell backslash-quoting code (used in the output of `set' | |
9014 | and completion) now quotes tildes if they appear at the start of the | |
9015 | string or after a `=' or `:'. | |
9016 | ||
9017 | m. A couple of bugs with `shopt -o' were fixed. | |
9018 | ||
9019 | n. `bash +o' now displays the same output as `set +o' before starting an | |
9020 | interactive shell. | |
9021 | ||
9022 | o. A bug that caused command substitution and the `eval' builtin to | |
9023 | occasionally free memory twice when an error was encountered was fixed. | |
9024 | ||
9025 | p. The filename globbing code no longer requires read permission for a | |
9026 | directory when the filename to be matched does not contain any globbing | |
9027 | characters, as POSIX.2 specifies. | |
9028 | ||
9029 | q. A bug was fixed so that the job containing the last asynchronous | |
9030 | process is not removed from the job table until a `wait' is executed | |
9031 | for that process or another asynchronous process is started. This | |
9032 | satisfies a POSIX.2 requirement. | |
9033 | ||
9034 | r. A `select' bug was fixed so that a non-numeric user response is treated | |
9035 | the same as a numeric response that is out of range. | |
9036 | ||
9037 | s. The shell no longer parses the value of SHELLOPTS from the environment | |
9038 | if it is restricted, running setuid, or running in `privileged mode'. | |
9039 | ||
9040 | t. Fixes were made to enable large file support on systems such as | |
9041 | Solaris 2.6, where the size of a file may be larger than can be held | |
9042 | in an `int'. | |
9043 | ||
9044 | u. The filename hashing code was fixed to not add `./' to the beginning of | |
9045 | filenames which already begin with `./'. | |
9046 | ||
9047 | v. The configure script was changed so that the GNU termcap library is not | |
9048 | compiled in if `prefer-curses' has been specified. | |
9049 | ||
9050 | w. HISTCONTROL and HISTIGNORE are no longer applied to the second and | |
9051 | subsequent lines of a multi-line command. | |
9052 | ||
9053 | x. A fix was made to `disown' so that it does a better job of catching | |
9054 | out-of-range jobs. | |
9055 | ||
9056 | y. Non-interactive shells no longer report the status of processes terminated | |
9057 | due to SIGINT, even if the standard output is a terminal. | |
9058 | ||
9059 | z. A bug that caused the output of `jobs' to have extra carriage returns | |
9060 | was fixed. | |
9061 | ||
9062 | aa. A bug that caused PIPESTATUS to not be set when builtins or shell | |
9063 | functions were executed in the foreground was fixed. | |
9064 | ||
9065 | bb. Bash now attempts to detect when it is being run by sshd, and treats | |
9066 | that case identically to being run by rshd. | |
9067 | ||
9068 | cc. A bug that caused `set -a' to export SHELLOPTS when one of the shell | |
9069 | options was changed was fixed. | |
9070 | ||
9071 | dd. The `kill' builtin now disallows empty or missing process id arguments | |
9072 | instead of treating them as identical to `0', which means the current | |
9073 | process. | |
9074 | ||
9075 | ee. `var=value declare -x var' now behaves identically to | |
9076 | `var=value export var'. Similarly for `var=value declare -r var' and | |
9077 | `var=value readonly var'. | |
9078 | ||
9079 | ff. A few memory leaks were fixed. | |
9080 | ||
9081 | gg. `alias' and `unalias' now print error messages when passed an argument | |
9082 | that is not an alias for printing or deletion, even when the shell is | |
9083 | not interactive, as POSIX.2 specifies. | |
9084 | ||
9085 | hh. `alias' and `alias -p' now return a status of 0 when no aliases are | |
9086 | defined, as POSIX.2 specifes. | |
9087 | ||
9088 | ii. `cd -' now prints the pathname of the new working directory if the shell | |
9089 | is interactive. | |
9090 | ||
9091 | jj. A fix was made so that the code that binds $PWD now copes with getcwd() | |
9092 | returning NULL. | |
9093 | ||
9094 | kk. `unset' now checks whether or not a function name it's trying to unset | |
9095 | is a valid shell identifier only when the shell is running in posix mode. | |
9096 | ||
9097 | ll. A change was made to the code that generates filenames for here documents | |
9098 | to make them less prone to name collisions. | |
9099 | ||
9100 | mm. The parser was changed so that `time' is recognized as a reserved word | |
9101 | only at the beginning of a pipeline. | |
9102 | ||
9103 | nn. The pathname canonicalization code was changed so that `//' is converted | |
9104 | into `/', but all other pathnames beginning with `//' are left alone, as | |
9105 | POSIX.2 specifies. | |
9106 | ||
9107 | oo. The `logout' builtin will no longer exit a non-interactive non-login | |
9108 | shell. | |
9109 | ||
9110 | 2. Changes to Readline | |
9111 | ||
9112 | a. Fixed a problem in the readline test program rltest.c that caused a core | |
9113 | dump. | |
9114 | ||
9115 | b. The code that handles parser directives in inputrc files now displays | |
9116 | more error messages. | |
9117 | ||
9118 | c. The history expansion code was fixed so that the appearance of the | |
9119 | history comment character at the beginning of a word inhibits history | |
9120 | expansion for that word and the rest of the input line. | |
9121 | ||
9122 | 3. New Features in Bash | |
9123 | ||
9124 | a. A new version of malloc, based on the older GNU malloc, that has many | |
9125 | changes, is more page-based, is more conservative with memory usage, | |
9126 | and does not `orphan' large blocks when they are freed. | |
9127 | ||
9128 | b. A new version of gmalloc, based on the old GLIBC malloc, with many | |
9129 | changes and range checking included by default. | |
9130 | ||
9131 | c. A new implementation of fnmatch(3) that includes full POSIX.2 Basic | |
9132 | Regular Expression matching, including character classes, collating | |
9133 | symbols, equivalence classes, and support for case-insensitive pattern | |
9134 | matching. | |
9135 | ||
9136 | d. ksh-88 egrep-style extended pattern matching ([@+*?!](patlist)) has been | |
9137 | implemented, controlled by a new `shopt' option, `extglob'. | |
9138 | ||
9139 | e. There is a new ksh-like `[[' compound command, which implements | |
9140 | extended `test' functionality. | |
9141 | ||
9142 | f. There is a new `printf' builtin, implemented according to the POSIX.2 | |
9143 | specification. | |
9144 | ||
9145 | g. There is a new feature for command substitution: $(< filename) now expands | |
9146 | to the contents of `filename', with any trailing newlines removed | |
9147 | (equivalent to $(cat filename)). | |
9148 | ||
9149 | h. There are new tilde prefixes which expand to directories from the | |
9150 | directory stack. | |
9151 | ||
9152 | i. There is a new `**' arithmetic operator to do exponentiation. | |
9153 | ||
9154 | j. There are new configuration options to control how bash is linked: | |
9155 | `--enable-profiling', to allow bash to be profiled with gprof, and | |
9156 | `--enable-static-link', to allow bash to be linked statically. | |
9157 | ||
9158 | k. There is a new configuration option, `--enable-cond-command', which | |
9159 | controls whether or not the `[[' command is included. It is on by | |
9160 | default. | |
9161 | ||
9162 | l. There is a new configuration option, `--enable-extended-glob', which | |
9163 | controls whether or not the ksh extended globbing feature is included. | |
9164 | It is enabled by default. | |
9165 | ||
9166 | m. There is a new configuration #define in config.h.top that, when enabled, | |
9167 | will cause all login shells to source /etc/profile and one of the user- | |
9168 | specific login shell startup files, whether or not the shell is | |
9169 | interactive. | |
9170 | ||
9171 | n. There is a new invocation option, `--dump-po-strings', to dump | |
9172 | a shell script's translatable strings ($"...") in GNU `po' format. | |
9173 | ||
9174 | o. There is a new `shopt' option, `nocaseglob', to enable case-insensitive | |
9175 | pattern matching when globbing filenames and using the `case' construct. | |
9176 | ||
9177 | p. There is a new `shopt' option, `huponexit', which, when enabled, causes | |
9178 | the shell to send SIGHUP to all jobs when an interactive login shell | |
9179 | exits. | |
9180 | ||
9181 | q. `bind' has a new `-u' option, which takes a readline function name as an | |
9182 | argument and unbinds all key sequences bound to that function in a | |
9183 | specified keymap. | |
9184 | ||
9185 | r. `disown' now has `-a' and `-r' options, to limit operation to all jobs | |
9186 | and running jobs, respectively. | |
9187 | ||
9188 | s. The `shopt' `-p' option now causes output to be displayed in a reusable | |
9189 | format. | |
9190 | ||
9191 | t. `test' has a new `-N' option, which returns true if the filename argument | |
9192 | has been modified since it was last accessed. | |
9193 | ||
9194 | u. `umask' now has a `-p' option to print output in a reusable format. | |
9195 | ||
9196 | v. A new escape sequence, `\xNNN', has been added to the `echo -e' and $'...' | |
9197 | translation code. It expands to the character whose ascii code is NNN | |
9198 | in hexadecimal. | |
9199 | ||
9200 | w. The prompt string expansion code has a new `\r' escape sequence. | |
9201 | ||
9202 | x. The shell may now be cross-compiled for the CYGWIN32 environment on | |
9203 | a Unix machine. | |
9204 | ||
9205 | 4. New Features in Readline | |
9206 | ||
9207 | a. There is now an option for `iterative' yank-last-arg handline, so a user | |
9208 | can keep entering `M-.', yanking the last argument of successive history | |
9209 | lines. | |
9210 | ||
9211 | b. New variable, `print-completions-horizontally', which causes completion | |
9212 | matches to be displayed across the screen (like `ls -x') rather than up | |
9213 | and down the screen (like `ls'). | |
9214 | ||
9215 | c. New variable, `completion-ignore-case', which causes filename completion | |
9216 | and matching to be performed case-insensitively. | |
9217 | ||
9218 | d. There is a new bindable command, `magic-space', which causes history | |
9219 | expansion to be performed on the current readline buffer and a space to | |
9220 | be inserted into the result. | |
9221 | ||
9222 | e. There is a new bindable command, `menu-complete', which enables tcsh-like | |
9223 | menu completion (successive executions of menu-complete insert a single | |
9224 | completion match, cycling through the list of possible completions). | |
9225 | ||
9226 | f. There is a new bindable command, `paste-from-clipboard', for use on Win32 | |
9227 | systems, to insert the text from the Win32 clipboard into the editing | |
9228 | buffer. | |
9229 | ||
9230 | g. The key sequence translation code now understands printf-style backslash | |
9231 | escape sequences, including \NNN octal escapes. These escape sequences | |
9232 | may be used in key sequence definitions or macro values. | |
9233 | ||
9234 | h. An `$include' inputrc file parser directive has been added. | |
9235 | ||
9236 | ------------------------------------------------------------------------------ | |
e8ce775d JA |
9237 | This document details the changes between this version, bash-2.01.1-release, |
9238 | and the previous version, bash-2.01-release. | |
9239 | ||
9240 | 1. Changes to Bash | |
9241 | ||
9242 | a. The select command was fixed to check the validity of the user's | |
9243 | input more strenuously. | |
9244 | ||
9245 | b. A bug was fixed that prevented `time' from timing commands correctly | |
9246 | when supplied as an argument to `bash -c'. | |
9247 | ||
9248 | c. A fix was made to the mail checking code to keep from adding the same | |
9249 | mail file to the list of files to check multiple times when parsing | |
9250 | $MAILPATH. | |
9251 | ||
9252 | d. Fixed an off-by-one error in the tilde expansion library. | |
9253 | ||
9254 | e. When using the compound array assignment syntax, the old value of | |
9255 | the array is cleared before assigning the new value. | |
9256 | ||
9257 | f. Fixed a bug that could cause a core dump when a trap handler was reset | |
9258 | to the default in the trap command associated with that signal. | |
9259 | ||
9260 | g. Fixed a bug in the locale code that occurred when assigning a value | |
9261 | to LC_ALL. | |
9262 | ||
9263 | h. A change was made to the parser so that words of the form xxx=(...) | |
9264 | are not considered compound assignment statements unless there are | |
9265 | characters before the `='. | |
9266 | ||
9267 | i. A fix was made to the command tracing code to correctly quote each | |
9268 | word of output. | |
9269 | ||
9270 | j. Some changes were made to the bash-specific autoconf tests to make them | |
9271 | more portable. | |
9272 | ||
9273 | k. Completion of words with globbing characters now correctly quotes the | |
9274 | result. | |
9275 | ||
9276 | l. The directory /var/spool/mail is now preferred to /usr/spool/mail when | |
9277 | configure is deciding on the default mail directory. | |
9278 | ||
9279 | m. The brace completion code was fixed to not quote the `{' and `}'. | |
9280 | ||
9281 | n. Some fixes were made to make $RANDOM more random in subshells. | |
9282 | ||
9283 | o. System-specific changes were made to configure for: SVR4.2 | |
9284 | ||
9285 | p. Changes were made so that completion of words containing globbing chars | |
9286 | substitutes the result only if a single filename was matched. | |
9287 | ||
9288 | q. The window size is now recomputed after a job is stopped with SIGTSTP if | |
9289 | the user has set `checkwinsize' with `shopt'. | |
9290 | ||
9291 | r. When doing substring expansion, out-of-range substring specifiers now | |
9292 | cause nothing to be substituted rather than an expansion error. | |
9293 | ||
9294 | s. A fix was made so that you can no longer trap `SIGEXIT' or `SIGDEBUG' -- | |
9295 | only `EXIT' and `DEBUG' are accepted. | |
9296 | ||
9297 | t. The display of trapped signals now uses the signal number if signals | |
9298 | for which bash does not know the name are trapped. | |
9299 | ||
9300 | u. A fix was made so that `bash -r' does not turn on restricted mode until | |
9301 | after the startup files are executed. | |
9302 | ||
9303 | v. A bug was fixed that occasionally caused a core dump when a variable | |
9304 | found in the temporary environment of export/declare/readonly had a | |
9305 | null value. | |
9306 | ||
9307 | w. A bug that occasionally caused unallocated memory to be passed to free() | |
9308 | when doing arithmetic substitution was fixed. | |
9309 | ||
9310 | x. A bug that caused a buffer overrun when expanding a prompt string | |
9311 | containing `\w' and ${#PWD} exceeded PATH_MAX was fixed. | |
9312 | ||
9313 | y. A problem with the completion code that occasionally caused it to | |
9314 | refer to a character before the beginning of the readline line buffer | |
9315 | was fixed. | |
9316 | ||
9317 | z. A bug was fixed so that the `read' builtin restarts reads when | |
9318 | interrupted by signals other than SIGINT. | |
9319 | ||
9320 | aa. Fixed a bug that caused a command to be freed twice when there was | |
9321 | an evaluation error in the `eval' command. | |
9322 | ||
9323 | 2. Changes to Readline | |
9324 | ||
9325 | a. Added a missing `extern' to a declaration in readline.h that kept | |
9326 | readline from compiling cleanly on some systems. | |
9327 | ||
9328 | b. The history file is now opened with mode 0600 when it is written for | |
9329 | better security. | |
9330 | ||
9331 | c. Changes were made to the SIGWINCH handling code so that prompt redisplay | |
9332 | is done better. | |
9333 | ||
9334 | d. ^G now interrupts incremental searches correctly. | |
9335 | ||
9336 | e. A bug that caused a core dump when the set of characters to be quoted | |
9337 | when completing words was empty was fixed. | |
9338 | ||
9339 | ------------------------------------------------------------------------------ | |
d166f048 JA |
9340 | This document details the changes between this version, bash-2.01-release, |
9341 | and the previous version, bash-2.01-beta2. | |
9342 | ||
9343 | 1. Changes to Bash | |
9344 | ||
9345 | a. The `distclean' target should remove the `printenv' executable if it | |
9346 | has been created. | |
9347 | ||
9348 | b. The test suite was changed slightly to ensure that the error messages | |
9349 | are printed in English. | |
9350 | ||
9351 | c. A bug that caused the shell to dump core when a filename containing a | |
9352 | `/' was passed to `hash' was fixed. | |
9353 | ||
9354 | d. Pathname canonicalization now leaves a leading `//' intact, as POSIX.1 | |
9355 | requires. | |
9356 | ||
9357 | e. A memory leak when completing commands was fixed. | |
9358 | ||
9359 | f. A memory leak that occurred when checking the hash table for commands | |
9360 | with relative paths was fixed. | |
9361 | ||
9362 | ------------------------------------------------------------------------------ | |
9363 | This document details the changes between this version, bash-2.01-beta2, | |
9364 | and the previous version, bash-2.01-beta1. | |
9365 | ||
9366 | 1. Changes to Bash | |
9367 | ||
9368 | a. The `ulimit' builtin translates RLIM_INFINITY to the hard limit only if | |
9369 | the current (soft) limit is less than or equal to the hard limit. | |
9370 | ||
9371 | b. Fixed a bug that caused the bash emulation of strcasecmp to produce | |
9372 | incorrect results. | |
9373 | ||
9374 | c. A bug that caused memory to be freed twice when a trap handler resets | |
9375 | the trap more than once was fixed. | |
9376 | ||
9377 | d. A bug that caused machines where sizeof (pointer) > sizeof (int) to | |
9378 | fail (and possibly dump core) when trying to unwind-protect a null | |
9379 | pointer was fixed. | |
9380 | ||
9381 | e. The startup files should not be run with job control enabled. This fix | |
9382 | allows SIGINT to once again interrupt startup file execution. | |
9383 | ||
9384 | f. Bash should not change the SIGPROF handler if it is set to something | |
9385 | other than SIG_DFL. | |
9386 | ||
9387 | g. The completion code that provides bash-specific completions for readline | |
9388 | now quotes characters that the readline code would treat as word break | |
9389 | characters if they appear in a file name. | |
9390 | ||
9391 | h. The completion code now correctly quotes filenames containing a `!', | |
9392 | even if the user attempted to use double quotes when attempting | |
9393 | completion. | |
9394 | ||
9395 | i. A bug that caused the shell to dump core when `disown' was called without | |
9396 | arguments and there was no current job was fixed. | |
9397 | ||
9398 | j. A construct like $((foo);bar) is now processed as a command substitution | |
9399 | rather than as a bad arithmetic substitution. | |
9400 | ||
9401 | k. A couple of bugs that caused `fc' to not obey the `cmdhist' and `lithist' | |
9402 | shell options when editing and re-executing a series of commands were | |
9403 | fixed. | |
9404 | ||
9405 | l. A fix was made to the grammar -- the list of commands between `do' and | |
9406 | `done' in the body of a `for' command should be treated the same as a | |
9407 | while loop. | |
9408 | ||
9409 | 2. Changes to Readline | |
9410 | ||
9411 | a. A couple of bugs that caused the history search functions to attempt to | |
9412 | free a NULL pointer were fixed. | |
9413 | ||
9414 | b. If the C library provides setlocale(3), readline does not need to look | |
9415 | at various environment variables to decide whether or not to go into | |
9416 | eight-bit mode automatically -- just check whether the current locale | |
9417 | is not `C' or `POSIX'. | |
9418 | ||
9419 | c. If the filename completion function finds that a directory was not closed | |
9420 | by a previous (interrupted) completion, it closes the directory with | |
9421 | closedir(). | |
9422 | ||
9423 | 3. New Features in Bash | |
9424 | ||
9425 | a. New bindable readline commands: history-and-alias-expand-line and | |
9426 | alias-expand-line. The code was always in there, there was just no | |
9427 | way to execute it. | |
9428 | ||
9429 | ------------------------------------------------------------------------------ | |
9430 | This document details the changes between this version, bash-2.01-beta1, | |
9431 | and the previous version, bash-2.01-alpha1. | |
9432 | ||
9433 | 1. Changes to Bash | |
9434 | ||
9435 | a. Fixed a problem that could cause file descriptors used for process | |
9436 | substitution to conflict with those used explicitly in redirections. | |
9437 | ||
9438 | b. Made it easier to regenerate configure if the user changes configure.in. | |
9439 | ||
9440 | c. ${GROUPS[0]} should always be the primary group, even on systems without | |
9441 | multiple groups. | |
9442 | ||
9443 | d. Spelling correction is no longer enabled by default. | |
9444 | ||
9445 | e. Fixes to quoting problems in `bashbug'. | |
9446 | ||
9447 | f. OS-specific configuration changes were made for: Irix 6. | |
9448 | ||
9449 | g. OS-specific code changes were made for: QNX. | |
9450 | ||
9451 | h. A more meaningful message is now printed when the file in /tmp for a | |
9452 | here document cannot be created. | |
9453 | ||
9454 | i. Many changes to the shell's variable initialization code to speed | |
9455 | non-interactive startup. | |
9456 | ||
9457 | j. Changes to the non-job-control code so that it does not try to open | |
9458 | /dev/tty. | |
9459 | ||
9460 | k. The output of `set' and `export' is once again sorted, as POSIX wants. | |
9461 | ||
9462 | l. Fixed a problem caused by a recursive call reparsing the value of | |
9463 | $SHELLOPTS. | |
9464 | ||
9465 | m. The tilde code no longer calls getenv() when it's compiled as part of | |
9466 | the shell, which should eliminate problems on systems that cannot | |
9467 | redefine getenv(), like the NeXT OS. | |
9468 | ||
9469 | n. Fixed a problem that caused `bash -o' or `bash +o' to not list all | |
9470 | the shell options. | |
9471 | ||
9472 | o. Fixed `ulimit' to convert RLIM_INFINITY to the appropriate hard limit | |
9473 | only if the hard limit is greater than the current (soft) limit. | |
9474 | ||
9475 | p. Fixed a problem that arose when building bash in a different directory | |
9476 | than the source and y.tab.[ch] were remade with something other than | |
9477 | bison. This came up most often on NetBSD. | |
9478 | ||
9479 | q. Fixed a problem with completion -- it thought that `pwd`/[TAB] indicated | |
9480 | an unfinished command completion (`/), which generated errors. | |
9481 | ||
9482 | r. The bash special tilde expansions (~-, ~+) are now attempted before | |
9483 | calling the standard tilde expansion code, which should eliminate the | |
9484 | problems people have been seeing with this on Solaris 2.5.1. | |
9485 | ||
9486 | s. Added support for <stdarg.h> to places where it was missing. | |
9487 | ||
9488 | t. Changed the code that reads the output of a command substitution to not | |
9489 | go through stdio. This reduces the memory requirements and is faster. | |
9490 | ||
9491 | u. A number of changes to speed up export environment creation were made. | |
9492 | ||
9493 | v. A number of memory leaks were fixed as the result of running the test | |
9494 | scripts through Purify. | |
9495 | ||
9496 | w. Fixed a bug that caused subshells forked to interpret executable | |
9497 | scripts without a leading `#!' to not reinitialize the values of | |
9498 | the shell options. | |
9499 | ||
9500 | 2. Changes to Readline | |
9501 | ||
9502 | a. History library has less `#ifdef SHELL' code -- abstracted stuff out | |
9503 | into application-specific function hooks. | |
9504 | ||
9505 | b. Readline no longer calls getenv() if it's compiled as part of the shell, | |
9506 | which should eliminate problems on systems that cannot redefine getenv(), | |
9507 | like the NeXT OS. | |
9508 | ||
9509 | c. Fixed translation of ESC when `untranslating' macro values. | |
9510 | ||
9511 | d. The region kill operation now fixes the mark if it ends up beyond the | |
9512 | boundaries of the line after the region is deleted. | |
9513 | ||
9514 | 3. New Features in Bash | |
9515 | ||
9516 | a. New argument for `configure': `--with-curses'. This can be used to | |
9517 | override the selection of the termcap library on systems where it is | |
9518 | deficient. | |
9519 | ||
9520 | ------------------------------------------------------------------------------ | |
9521 | This document details the changes between this version, bash-2.01-alpha1, | |
9522 | and the previous version, bash-2.0-release. | |
9523 | ||
9524 | 1. Changes to Bash | |
9525 | ||
9526 | a. System-specific configuration changes for: FreeBSD, SunOS4, Irix, | |
9527 | MachTen, QNX 4.2, Harris Night Hawk, SunOS5. | |
9528 | ||
9529 | b. System-specific code changes were made for: Linux, 4.4 BSD, QNX 4.2, | |
9530 | HP-UX, AIX 4.2. | |
9531 | ||
9532 | c. A bug that caused the exec builtin to fail because the full pathname of | |
9533 | the command could not be found was fixed. | |
9534 | ||
9535 | d. The code that performs output redirections is now more resistant to | |
9536 | race conditions and possible security exploits. | |
9537 | ||
9538 | e. A bug that caused the shell to dump core when performing pattern | |
9539 | substitutions on variable values was fixed. | |
9540 | ||
9541 | f. More hosts are now recognized by the auto-configuration mechanism | |
9542 | (OpenBSD, QNX, others). | |
9543 | ||
9544 | g. Assignments to read-only variables that attempt to convert them to | |
9545 | arrays are now errors. | |
9546 | ||
9547 | h. A bug that caused shell scripts using array assignments in POSIX mode | |
9548 | to exit after the assignment was performed was fixed. | |
9549 | ||
9550 | i. The substring expansion code is now more careful about running off the | |
9551 | ends of the expanded variable value. | |
9552 | ||
9553 | j. A bug that caused completion to fail if a backquoted command substitution | |
9554 | appeared anywhere on the line was fixed. | |
9555 | ||
9556 | k. The `source' builtin no longer turns off history if it has been enabled | |
9557 | in a non-interactive shell. | |
9558 | ||
9559 | l. A bug that caused the shell to crash when `disown' was given a pid | |
9560 | instead of a job number was fixed. | |
9561 | ||
9562 | m. The `cd' spelling correction code will not try to change to `.' if no | |
9563 | directory entries match a single-character argument. | |
9564 | ||
9565 | n. A bad variable name supplied to `declare', `export', or `readonly' no | |
9566 | longer causes a non-interactive shell in POSIX mode to exit. | |
9567 | ||
9568 | o. Some fixes were made to the test suite to handle peculiarities of | |
9569 | various Unix versions. | |
9570 | ||
9571 | p. The bash completion code now quotes characters that readline would | |
9572 | treat as word breaks for completion but are not shell metacharacters. | |
9573 | ||
9574 | q. Bad options supplied at invocation now cause a usage message to be | |
9575 | displayed. | |
9576 | ||
9577 | r. Fixes were made to the code that handles DEBUG traps so that the trap | |
9578 | string is not freed inappropriately. | |
9579 | ||
9580 | s. Some changes were made to the bash debugger in examples/bashdb -- it | |
9581 | should be closer to working now. | |
9582 | ||
9583 | t. A problem that caused the default filename used for mail checking to be | |
9584 | wrong was fixed. | |
9585 | ||
9586 | u. A fix was made to the `echo' builtin so that NUL characters printed with | |
9587 | `echo -e' do not cause the output to be truncated. | |
9588 | ||
9589 | v. A fix was made to the job control code so that the shell behaves better | |
9590 | when monitor mode is enabled in a non-interactive shell. | |
9591 | ||
9592 | w. Bash no longer catches all of the terminating signals in a non- | |
9593 | interactive shell until a trap is set on EXIT, which should result in | |
9594 | quicker startup. | |
9595 | ||
9596 | x. A fix was made to the command timing code so that `time' can be used in | |
9597 | a loop. | |
9598 | ||
9599 | y. A fix was made to the parser so that `((cmd); cmd2)' is now parsed as | |
b72432fd | 9600 | a nested subshell rather than strictly as an (erroneous) arithmetic |
d166f048 JA |
9601 | command. |
9602 | ||
9603 | z. A fix was made to the globbing code so that it correctly matches quoted | |
9604 | filenames beginning with a `.'. | |
9605 | ||
9606 | aa. A bug in `fc' that caused some multi-line commands to not be stored as | |
9607 | one command in the history when they were re-executed after editing | |
9608 | (with `fc -e') was fixed. | |
9609 | ||
9610 | bb. The `ulimit' builtin now attempts to catch some classes of integer | |
9611 | overflows. | |
9612 | ||
9613 | cc. The command-oriented-history code no longer attempts to add `;' | |
9614 | inappropriately when a newline appears while reading a $(...) command | |
9615 | substitution. | |
9616 | ||
9617 | dd. A bug that caused the shell to dump core when `help --' was executed | |
9618 | was fixed. | |
9619 | ||
9620 | ee. A bug that caused the shell to crash when an unset variable appeared | |
9621 | in the body of a here document after `set -u' had been executed was | |
9622 | fixed. | |
9623 | ||
9624 | ff. Implicit input redirections from /dev/null for asynchronous commands | |
9625 | are now handled better. | |
9626 | ||
9627 | gg. A bug that caused the shell to fail to compile when configured with | |
9628 | `--disable-readline' was fixed. | |
9629 | ||
9630 | hh. The globbing code should now be interruptible. | |
9631 | ||
9632 | ii. Bash now notices when the `kill' builtin is used to send SIGCONT to a | |
9633 | stopped job and adjusts the data structures accordingly, as if `bg' had | |
9634 | been executed instead. | |
9635 | ||
9636 | jj. A bug that caused the shell to crash when mixing calls to `getopts' | |
9637 | and `shift' on the same set of positional parameters was fixed. | |
9638 | ||
9639 | kk. The command printing code now preserves the `-p' flag to `time'. | |
9640 | ||
9641 | ll. The command printing code now handles here documents better when there | |
9642 | are other redirections associated with the command. | |
9643 | ||
9644 | mm. The special glibc environment variable (NNN_GNU_nonoption_argv_flags_) | |
9645 | is no longer placed into the environment of executed commands -- users | |
9646 | of glibc had too many problems with it. | |
9647 | ||
9648 | nn. Reorganized the code that generates signames.h. The signal_names list | |
9649 | is now more complete but may be slightly different (SIGABRT is favored | |
9650 | over SIGIOT, for example). The preferred signal names are those | |
9651 | listed in the POSIX.2 standard. | |
9652 | ||
9653 | oo. `bashbug' now uses a filename shorter than 14 characters for its | |
9654 | temporary file, and asks for confirmation before sending the bug | |
9655 | report. | |
9656 | ||
9657 | pp. A bug that caused TAB completion in vi editing mode to not be turned | |
9658 | off when `set -o posix' was executed or back on when `set +o posix' | |
9659 | was executed was fixed. | |
9660 | ||
9661 | qq. A bug in the brace expansion code that caused brace expansions appearing | |
9662 | in new-style $(...) command substitutions to be inappropriately expanded | |
9663 | was fixed. | |
9664 | ||
9665 | rr. A bug in the readline hook shell-expand-line that could cause memory to | |
9666 | be inappropriately freed was fixed. | |
9667 | ||
9668 | ss. A bug that caused some arithmetic expressions containing `&&' and `||' | |
9669 | to be parsed with the wrong precedence has been fixed. | |
9670 | ||
9671 | tt. References to unbound variables after `set -u' has been executed now | |
9672 | cause the shell to exit immediately, as they should. | |
9673 | ||
9674 | uu. A bug that caused the shell to exit inappropriately when `set -e' had | |
9675 | been executed and a command's return status was being inverted with the | |
9676 | `!' reserved word was fixed. | |
9677 | ||
9678 | vv. A bug that could occasionally cause the shell to crash with a | |
9679 | divide-by-zero error when timing a command was fixed. | |
9680 | ||
9681 | ww. A bug that caused parameter pattern substitution to leave stray | |
9682 | backslashes in the replacement string when the expression is in | |
9683 | double quotes was fixed. | |
9684 | ||
9685 | xx. The `break' and `continue' builtins now break out of all loops when an | |
9686 | invalid count argument is supplied. | |
9687 | ||
9688 | yy. Fixed a bug that caused PATH to be set to the empty string if | |
9689 | `command -p' is executed with PATH unset. | |
9690 | ||
9691 | zz. Fixed `kill -l signum' to print the signal name without the `SIG' prefix, | |
9692 | as POSIX specifies. | |
9693 | ||
9694 | aaa. Fixed a bug that caused the shell to crash while setting $SHELLOPTS | |
9695 | if there were no shell options set. | |
9696 | ||
9697 | bbb. Fixed `export -p' and `readonly -p' so that when the shell is in POSIX | |
9698 | mode, their output is as POSIX.2 specifies. | |
9699 | ||
9700 | ccc. Fixed a bug in `readonly' so that `readonly -a avar=(...)' actually | |
9701 | creates an array variable. | |
9702 | ||
9703 | ddd. Fixed a bug that prevented `time' from correctly timing background | |
9704 | pipelines. | |
9705 | ||
9706 | 2. Changes to Readline | |
9707 | ||
9708 | a. A bug that caused an extra newline to be printed when the cursor was on | |
9709 | an otherwise empty line was fixed. | |
9710 | ||
9711 | b. An instance of memory being used after it was freed was corrected. | |
9712 | ||
9713 | c. The redisplay code now works when the prompt is longer than the screen | |
9714 | width. | |
9715 | ||
9716 | d. `dump-macros' is now a bindable name, as it should have been all along. | |
9717 | ||
9718 | e. Non-printable characters are now expanded when displaying macros and | |
9719 | their values. | |
9720 | ||
9721 | f. The `dump-variables' and `dump-macros' commands now output a leading | |
9722 | newline if they're called as the result of a key sequence, rather | |
9723 | than directly by an application. | |
9724 | ||
9725 | 3. New Features in Bash | |
9726 | ||
9727 | a. There is a new builtin array variable: GROUPS, the set of groups to which | |
9728 | the user belongs. This is used by the test suite. | |
9729 | ||
9730 | 4. New Features in Readline | |
9731 | ||
9732 | a. If a key sequence bound to `universal-argument' is read while reading a | |
9733 | numeric argument started with `universal-argument', it terminates the | |
9734 | argument but is otherwise ignored. This provides a way to insert multiple | |
9735 | instances of a digit string, and is how GNU emacs does it. | |
9736 | ||
9737 | ------------------------------------------------------------------------------ | |
ccc6cda3 JA |
9738 | This document details the changes between this version, bash-2.0-release, |
9739 | and the previous version, bash-2.0-beta3. | |
9740 | ||
9741 | 1. Changes to Bash | |
9742 | ||
9743 | a. Fix to the `getopts' builtin so that it does the right thing when a | |
9744 | required option argument is not present. | |
9745 | ||
9746 | b. The completion code now updates the common prefix of matched names | |
9747 | after FIGNORE processing is done, since any names that were removed | |
9748 | may have changed the common prefix. | |
9749 | ||
9750 | c. Fixed a bug that made messages in MAILPATH entries not work correctly. | |
9751 | ||
9752 | d. Fixed a serious documentation error in the description of the new | |
9753 | ${parameter:offset[:length]} expansion. | |
9754 | ||
9755 | e. Fixes to make parameter substring expansion ({$param:offset[:length]}) | |
9756 | work when within double quotes. | |
9757 | ||
9758 | f. Fixes to make ^A (CTLESC) survive an unquoted expansion of positional | |
9759 | parameters. | |
9760 | ||
9761 | g. Corrected a misspelling of `unlimited' in the output of `ulimit'. | |
9762 | ||
9763 | h. Fixed a bug that caused executable scripts without a leading `#!' to | |
9764 | occasionally pick up the wrong set of positional parameters. | |
9765 | ||
9766 | i. Linux systems now have a working `ulimit -v', using RLIMIT_AS. | |
9767 | ||
9768 | j. Updated config.guess so that many more machine types are recognized. | |
9769 | ||
9770 | k. Fixed a bug with backslash-quoted slashes in the ${param/pat[/sub]} | |
9771 | expansion. | |
9772 | ||
9773 | l. If the shell is named `-su', and `-c command' is supplied, read and | |
9774 | execute the login shell startup files even though the shell is not | |
9775 | interactive. This is to support the `-' option to `su'. | |
9776 | ||
9777 | m. Fixed a bug that caused core dumps when the DEBUG trap was ignored | |
9778 | with `trap "" DEBUG' and a shell function was subsequently executed. | |
9779 | ||
9780 | n. Fixed a bug that caused core dumps in the read builtin when IFS was | |
9781 | set to the null string and the input had leading whitespace. | |
9782 | ||
9783 | 2. Changes to Readline | |
9784 | ||
9785 | a. Fixed a bug that caused a numeric argument of 1024 to be ignored when | |
9786 | inserting text. | |
9787 | ||
9788 | b. Fixed the display code so that the numeric argument is displayed as it's | |
9789 | being entered. | |
9790 | ||
9791 | c. Fixed the numeric argument reading code so that `M-- command' is | |
9792 | equivalent to `M--1 command', as the prompt implies. | |
9793 | ||
9794 | 3. New Features in Bash | |
9795 | ||
9796 | a. `ulimit' now sets both hard and soft limits and reports the soft limit | |
9797 | by default (when neither -H nor -S is specified). This is compatible | |
9798 | with versions of sh and ksh that implement `ulimit'. | |
9799 | ||
9800 | b. Integer constants have been extended to base 64. | |
9801 | ||
9802 | 4. New Features in Readline | |
9803 | ||
9804 | a. The `home' and `end' keys are now bound to beginning-of-line and | |
9805 | end-of-line, respectively, if the corresponding termcap capabilities | |
9806 | are present. | |
9807 | ||
9808 | ------------------------------------------------------------------------------ | |
9809 | This document details the changes between this version, bash-2.0-beta3, | |
9810 | and the previous version, bash-2.0-beta2. | |
9811 | ||
9812 | 1. Changes to Bash | |
9813 | ||
9814 | a. System-specific changes for: AIX 4.2, SCO 3.2v[45], HP-UX. | |
9815 | ||
9816 | b. When in POSIX mode, variable assignments preceding a special builtin | |
9817 | persist in the shell environment after the builtin completes. | |
9818 | ||
9819 | c. Changed all calls to getwd() to getcwd(). Improved check for systems | |
9820 | where the libc getcwd() calls popen(), since that breaks on some | |
9821 | systems when job control is being used. | |
9822 | ||
9823 | d. Fixed a bug that caused seg faults when executing scripts with the | |
9824 | execute bit set but without a leading `#!'. | |
9825 | ||
9826 | e. The environment passed to executed commands is never sorted. | |
9827 | ||
9828 | f. A bug was fixed in the code that expands ${name[@]} to the number of | |
9829 | elements in an array variable. | |
9830 | ||
9831 | g. A bug was fixed in the array compound assignment code ( A=( ... ) ). | |
9832 | ||
9833 | h. Window size changes now correctly propagate down to readline if | |
9834 | the shopt `checkwinsize' option is enabled. | |
9835 | ||
9836 | i. A fix was made in the code that expands to the length of a variable | |
9837 | value (${#var}). | |
9838 | ||
9839 | j. A fix was made to the command builtin so that it did not turn on the | |
9840 | `no fork' flag inappropriately. | |
9841 | ||
9842 | k. A fix was made to make `set -n' work more reliably. | |
9843 | ||
9844 | l. A fix was made to the job control initialization code so that the | |
9845 | terminal process group is set to the shell's process group if the | |
9846 | shell changes its own process group. | |
9847 | ||
9848 | 2. Changes to Readline | |
9849 | ||
9850 | a. System-specific changes for: SCO 3.2v[45]. | |
9851 | ||
9852 | b. The behavior of the vi-mode `.' when redoing an `i' command was changed | |
9853 | to insert the text previously inserted by the `i' command rather than | |
9854 | simply entering insert mode. | |
9855 | ||
9856 | 3. New features in Bash | |
9857 | ||
9858 | a. There is a new version of the autoload function package, in | |
9859 | examples/functions/autoload.v2, that uses arrays and provides more | |
9860 | functionality. | |
9861 | ||
9862 | b. Support for LC_COLLATE and locale-specific sorting of the results of | |
9863 | pathname expansion if strcoll() is available. | |
9864 | ||
9865 | 4. New Features in Readline | |
9866 | ||
9867 | a. Support for locale-specific sorting of completion possibilities if | |
9868 | strcoll() is available. | |
9869 | ||
9870 | ------------------------------------------------------------------------------ | |
9871 | This document details the changes between this version, bash-2.0-beta2, | |
9872 | and the previous version, bash-2.0-beta1. | |
9873 | ||
9874 | 1. Changes to Bash | |
9875 | ||
9876 | a. `pushd -' is once again equivalent to `pushd $OLDPWD'. | |
9877 | ||
9878 | b. OS-specific changes for: SCO 3.2v[45]. | |
9879 | ||
9880 | c. A change was made to the fix for the recently-reported security hole | |
9881 | when reading characters with octal value 255 to make it work better on | |
9882 | systems with restartable system calls when not using readline. | |
9883 | ||
9884 | d. Some changes were made to the test suite so that it works if you | |
9885 | configure bash with --enable-usg-echo-default. | |
9886 | ||
9887 | e. A fix was made to the parsing of conditional arithmetic expressions. | |
9888 | ||
9889 | f. Illegal arithmetic bases now cause an arithmetic evaluation error rather | |
9890 | than being silently reset. | |
9891 | ||
9892 | g. Multiple arithmetic bases now cause an arithmetic evaluation error | |
9893 | instead of being ignored. | |
9894 | ||
9895 | h. A fix was made to the evaluation of ${param?word} to conform to POSIX.2. | |
9896 | ||
9897 | i. A bug that sometimes caused array indices to be evaluated twice (which | |
9898 | would cause errors when they contained assignment statements) was fixed. | |
9899 | ||
9900 | j. `ulimit' was rewritten to avoid problems with getrlimit(2) returning | |
9901 | unsigned values and to simplify the code. | |
9902 | ||
9903 | k. A bug in the command-oriented-history code that caused it to sometimes | |
9904 | put semicolons after right parens inappropriately was fixed. | |
9905 | ||
9906 | l. The values inserted into the prompt by the \w and \W escape sequences | |
9907 | are now quoted to prevent further expansion. | |
9908 | ||
9909 | m. An interactive shell invoked as `sh' now reads and executes commands | |
9910 | from the file named by $ENV when it starts up. If it's a login shell, | |
9911 | it does this after reading /etc/profile and ~/.profile. | |
9912 | ||
9913 | n. The file named by $ENV is never read by non-interactive shells. | |
9914 | ||
9915 | 2. Changes to Readline | |
9916 | ||
9917 | a. A few changes were made to hide some macros and functions that should not | |
9918 | be public. | |
9919 | ||
9920 | b. An off-by-one error that caused seg faults in the history expansion code | |
9921 | was fixed. | |
9922 | ||
9923 | 3. New Features in Bash | |
9924 | ||
9925 | a. The ksh-style ((...)) arithmetic command was implemented. It is exactly | |
9926 | identical to let "...". This is controlled by a new option to configure, | |
9927 | `--enable-dparen-arithmetic', which is on by default. | |
9928 | ||
9929 | b. There is a new #define available in config.h.top: SYS_BASH_LOGOUT. If | |
9930 | defined to a filename, bash reads and executes commands from that file | |
9931 | when a login shell exits. It's commented out by default. | |
9932 | ||
9933 | c. `ulimit' has a `-l' option that reports the maximum amount of data that | |
9934 | may be locked into memory on 4.4BSD-based systems. | |
9935 | ||
9936 | ------------------------------------------------------------------------------ | |
9937 | This document details the changes between this version, bash-2.0-beta1, | |
9938 | and the previous version, bash-2.0-alpha4. | |
9939 | ||
9940 | 1. Changes to Bash | |
9941 | ||
9942 | a. A bug that sometimes caused traps to be ignored on signals the | |
9943 | shell treats specially was fixed. | |
9944 | ||
9945 | b. The internationalization code was changed to track the values of | |
9946 | LC_* variables and call setlocale() as appropriate. The TEXTDOMAIN | |
9947 | and TEXTDOMAINDIR variables are also tracked; changes cause calls | |
9948 | to textdomain() and bindtextdomain(), if available. | |
9949 | ||
9950 | c. A bug was fixed that sometimes caused double-quoted strings to be | |
9951 | parsed incorrectly. | |
9952 | ||
9953 | d. Changes were made so that the siglist code compiles correctly on | |
9954 | Solaris 2.5. | |
9955 | ||
9956 | e. Added `:' to the set of characters that cause word breaks for the | |
9957 | completion code so that pathnames in assignments to $PATH can be | |
9958 | completed. | |
9959 | ||
9960 | f. The `select' command was fixed to print $PS3 to stderr. | |
9961 | ||
9962 | g. Fixed an error in the manual page section describing the effect that | |
9963 | setting and unsetting GLOBIGNORE has on the setting of the `dotglob' | |
9964 | option. | |
9965 | ||
9966 | h. The time conversion code now uses CLK_TCK rather than CLOCKS_PER_SEC | |
9967 | on systems without gettimeofday() and resources. | |
9968 | ||
9969 | i. The getopt static variables are now initialized each time a subshell | |
9970 | is started, so subshells using `getopts' work right. | |
9971 | ||
9972 | j. A sign-extension bug that caused a possible security hole was fixed. | |
9973 | ||
9974 | k. The parser now reads characters between backquotes within a double- | |
9975 | quoted string as a single word, so double quotes in the backquoted | |
9976 | string don't terminate the enclosing double-quoted string. | |
9977 | ||
9978 | l. A bug that caused `^O' to work incorrectly when typed as the first | |
9979 | thing to an interactive shell was fixed. | |
9980 | ||
9981 | m. A rarely-exercised off-by-one error in the code that quotes variable | |
9982 | values was fixed. | |
9983 | ||
9984 | n. Some memory and file descriptor leaks encountered when running a | |
9985 | shell script that is executable but does not have a leading `#!' | |
9986 | were plugged. | |
9987 | ||
9988 | 2. Changes to Readline | |
9989 | ||
9990 | a. A bug that sometimes caused incorrect results when trying to read | |
9991 | typeahead on systems without FIONREAD was fixed. | |
9992 | ||
9993 | 3. New Features in Bash | |
9994 | ||
9995 | a. The command timing code now uses the value of the TIMEFORMAT variable | |
9996 | to format and display timing statistics. | |
9997 | ||
9998 | b. The `time' reserved word now accepts a `-p' option to force the | |
9999 | POSIX.2 output format. | |
10000 | ||
10001 | c. There are a couple of new and updated scripts to convert csh startup | |
10002 | files to bash format. | |
10003 | ||
10004 | d. There is a new builtin array variable: BASH_VERSINFO. The various | |
10005 | members hold the parts of the version information in BASH_VERSION, | |
10006 | plus the value of MACHTYPE. | |
10007 | ||
10008 | 4. New Features in Readline | |
10009 | ||
10010 | a. Setting LANG to `en_US.ISO8859-1' now causes readline to enter | |
10011 | eight-bit mode. | |
10012 | ||
10013 | ------------------------------------------------------------------------------ | |
10014 | This document details the changes between this version, bash-2.0-alpha4, | |
10015 | and the previous version, bash-2.0-alpha3. | |
10016 | ||
10017 | 1. Changes to Bash | |
10018 | ||
10019 | a. There is better detection of rsh connections on Solaris 2. | |
10020 | ||
10021 | b. Assignments to read-only variables preceding a command name are now | |
10022 | variable assignment errors. Variable assignment errors cause | |
10023 | non-interactive shells running in posix mode to exit. | |
10024 | ||
10025 | c. The word tokenizer was rewritten to handle nested quotes and pairs | |
10026 | ('', "", ``, ${...}, $(...), $[...], $'...', $"...", <(...), >(...)) | |
10027 | correctly. Some of the parameter expansion code was updated as a | |
10028 | consequence. | |
10029 | ||
10030 | d. A fix was made to `test' when given three arguments so that a binary | |
10031 | operator is checked for first, before checking that the first argument | |
10032 | is `!'. | |
10033 | ||
10034 | e. 2''>/dev/null is no longer equivalent to 2>/dev/null. | |
10035 | ||
10036 | f. Parser error messages were regularized, and in most cases the name of | |
10037 | the shell script being read by a non-interactive shell is not printed | |
10038 | twice. | |
10039 | ||
10040 | g. A fix was made to the completion code so that it no longer removes the | |
10041 | text the user typed in some cases. | |
10042 | ||
10043 | h. The special glibc `getopt' environment variable is no longer put into | |
10044 | the environment on machines with small values of ARG_MAX. | |
10045 | ||
10046 | i. The expansion of ${...} now follows the POSIX.2 rules for finding the | |
10047 | closing `}'. | |
10048 | ||
10049 | j. The shell no longer displays spurious status messages for background | |
10050 | jobs in shell scripts that complete successfully when the script is | |
10051 | run from a terminal. | |
10052 | ||
10053 | k. `shopt -o' now correctly updates $SHELLOPTS. | |
10054 | ||
10055 | l. A bug that caused the $PATH searching code to return a non-executable | |
10056 | file even when an executable file with the same name appeared later in | |
10057 | $PATH was fixed. | |
10058 | ||
10059 | m. The shell now does tilde expansions on unquoted `:~' in assignment | |
10060 | statements when not in posix mode. | |
10061 | ||
10062 | n. Variable assignment errors when a command consists only of assignments | |
10063 | now cause non-interactive shells to exit when in posix mode. | |
10064 | ||
10065 | o. If the variable in a `for' or `select' command is read-only, or not a | |
10066 | legal shell identifier, a variable assignment error occurs. | |
10067 | ||
10068 | p. `test' now handles `-a' and `-o' as binary operators when three arguments | |
10069 | are supplied, and correctly parses `( word )' as equivalent to `word'. | |
10070 | ||
10071 | q. `test' was fixed so that file names of the form /dev/fd/NN mean the same | |
10072 | thing on all systems, even Linux. | |
10073 | ||
10074 | r. Fixed a bug in the globbing code that caused patterns with multiple | |
10075 | consecutive `*'s to not be matched correctly. | |
10076 | ||
10077 | s. Fixed a bug that caused $PS2 to not be printed when an interactive shell | |
10078 | not using readline is reading a here document. | |
10079 | ||
10080 | t. Fixed a bug that caused history expansion to be performed inappropriately | |
10081 | when a single-quoted string spanned more than one line. | |
10082 | ||
10083 | u. `getopts' now checks that the variable name passed by the user as the | |
10084 | second argument is a legal shell identifier and that the variable is | |
10085 | not read-only. | |
10086 | ||
10087 | v. Fixed `getopts' to obey POSIX.2 rules for setting $OPTIND when it | |
10088 | encounters an error. | |
10089 | ||
10090 | w. Fixed `set' to display variable values in a form that can be re-read. | |
10091 | ||
10092 | x. Fixed a bug in the code that keeps track of whether or not local variables | |
10093 | have been declared at the current level of function nesting. | |
10094 | ||
10095 | y. Non-interactive shells in posix mode now exit if the name in a function | |
10096 | declaration is not a legal identifier. | |
10097 | ||
10098 | z. The job control code now ignores stopped children when the shell is not | |
10099 | interactive. | |
10100 | ||
10101 | aa. The `cd' builtin no longer attempts spelling correction on the directory | |
10102 | name if the shell is not interactive, regardless of the setting of the | |
10103 | `cdspell' option. | |
10104 | ||
10105 | bb. Some OS-specific changes were made for SCO 3.2v[45] and AIX 4.2. | |
10106 | ||
10107 | cc. `time' now prints its output to stderr, as POSIX.2 specifies. | |
10108 | ||
10109 | 2. Fixes to Readline | |
10110 | ||
10111 | a. After printing possible completions, all lines of a multi-line prompt | |
10112 | are redisplayed. | |
10113 | ||
10114 | b. Some changes were made to the terminal handling code in rltty.c to | |
10115 | work around AIX 4.2 bugs. | |
10116 | ||
10117 | 3. New Features in Bash | |
10118 | ||
10119 | a. There is a new loadable builtin: sprintf, with calling syntax | |
10120 | sprintf var format [args] | |
10121 | This provides an easy way to simulate ksh left- and right-justified | |
10122 | variable values. | |
10123 | ||
10124 | b. The expansions of \h and \H in prompt strings were swapped. \h now | |
10125 | expands to the hostname up to the first `.', as in bash-1.14. | |
10126 | ||
10127 | 4. New Features in Readline | |
10128 | ||
10129 | a. The bash-1.14 behavior when ^M is typed while doing an incremental | |
10130 | search was restored. ^J may now be used to terminate the search without | |
10131 | accepting the line. | |
10132 | ||
10133 | b. There is a new bindable variable: disable-completion. This inhibits | |
10134 | word completion and causes the completion character to be inserted as | |
10135 | if it had been bound to self-insert. | |
10136 | ||
10137 | ------------------------------------------------------------------------------ | |
10138 | This document details the changes between this version, bash-2.0-alpha3, | |
10139 | and the previous version, bash-2.0-alpha2. | |
10140 | ||
10141 | There is now a file `COMPAT' included in the distribution that lists the | |
10142 | user-visible incompatibilities between 1.14 and 2.0. | |
10143 | ||
10144 | 1. Changes to Bash | |
10145 | ||
10146 | a. Some work was done so that word splitting of the rhs of assignment | |
10147 | statements conforms more closely to historical practice. | |
10148 | ||
10149 | b. A couple of errant memory frees were fixed. | |
10150 | ||
10151 | c. A fix was made to the test builtin so it recognizes `<' and `>' as | |
10152 | binary operators. | |
10153 | ||
10154 | d. The GNU malloc in lib/malloc/malloc.c now scrambles memory as it's | |
10155 | allocated and freed. This is to catch callers that refer to freed | |
10156 | memory or assume something about newly-allocated memory. | |
10157 | ||
10158 | e. Fixed a problem with conversion to 12-hour time in the prompt | |
10159 | expansion code. | |
10160 | ||
10161 | f. Fixed a problem with configure's argument parsing order. Now you can | |
10162 | correctly turn on specific options after using --enable-minimal-config. | |
10163 | ||
10164 | g. The configure script now automatically disables the use of GNU malloc | |
10165 | on systems where it's appropriate (better than having people read the | |
10166 | NOTES file and do it manually). | |
10167 | ||
10168 | h. There are new prompt expansions (\v and \V) to insert version information | |
10169 | into the prompt strings. | |
10170 | ||
10171 | i. The default prompt string now includes the version number. | |
10172 | ||
10173 | j. Most of the builtins that take no options were changed to use the | |
10174 | internal getopt so they can produce proper error messages for -? | |
10175 | and incorrect options. | |
10176 | ||
10177 | k. Some system-specific changes were made for SVR4.2 and Solaris 2.5. | |
10178 | ||
10179 | l. Bash now uses PATH_MAX instead of MAXPATHLEN and NAME_MAX instead of | |
10180 | MAXNAMLEN. | |
10181 | ||
10182 | m. A couple of problems caused by uninitialized variables were fixed. | |
10183 | ||
10184 | n. There are a number of new loadable builtin examples: logname, basename, | |
10185 | dirname, tty, pathchk, tee, head, and rmdir. All of these conform to | |
10186 | POSIX.2. | |
10187 | ||
10188 | o. Bash now notices changes in TZ and calls tzset() if present, so | |
10189 | changing TZ will alter the time printed by prompt expansions. | |
10190 | ||
10191 | p. The source was reorganized a bit so I don't have to wait so long for | |
10192 | some files to compile, and to facilitate the creation of a `shell | |
10193 | library' at some future point. | |
10194 | ||
10195 | q. Bash no longer turns off job control if called as `sh', since the | |
10196 | POSIX.2 spec includes job control as a standard feature. | |
10197 | ||
10198 | r. `bash -o posix' now works as intended. | |
10199 | ||
10200 | s. Fixed a problem with the completion code: when completing a filename | |
10201 | that contained globbing characters, if show-all-if-ambiguous was set, | |
10202 | the completion code would remove the user's text. | |
10203 | ||
10204 | t. Fixed ulimit so that (hopefully) the full range of limits is available | |
10205 | on HPUX systems. | |
10206 | ||
10207 | u. A new `shopt' option (`hostcomplete') enables and disables hostname | |
10208 | completion. | |
10209 | ||
10210 | v. The shell no longer attempts to save the history on an abort(), | |
10211 | which is usually called by programming_error(). | |
10212 | ||
10213 | w. The `-s' option to `fc' was changed to echo the command to be executed | |
10214 | to stderr instead of stdout. | |
10215 | ||
10216 | x. If the editor invoked by `fc -e' exits with a non-zero status, no | |
10217 | commands are executed. | |
10218 | ||
10219 | y. Fixed a bug that made the shopt `histverify' option work incorrectly. | |
10220 | ||
10221 | z. There is a new variable `MACHTYPE' whose value is the GNU-style | |
10222 | `cpu-company-system' system description as set by configure. (The | |
10223 | values of MACHTYPE and HOSTTYPE should really be swapped.) | |
10224 | ||
10225 | aa. The `ulimit' builtin now allows the maximum virtual memory size to be | |
10226 | set via setrlimit(2) if RLIMIT_VMEM is defined. | |
10227 | ||
10228 | bb. `bash -nc 'command'' no longer runs `command'. | |
10229 | ||
10230 | 2. Changes to Readline | |
10231 | ||
10232 | a. Fixed a typo in the code that checked for FIONREAD in input.c. | |
10233 | ||
10234 | b. Fixed a bug in the code that outputs keybindings, so things like C-\ | |
10235 | are quoted properly. | |
10236 | ||
10237 | c. Fixed a bug in the inputrc file parsing code to handle the problems | |
10238 | caused by inputrc files created from the output of `bind -p' in | |
10239 | previous versions of bash. The problem was due to the bug fixed | |
10240 | in item b above. | |
10241 | ||
10242 | d. Readline no longer turns off the terminal's meta key, and turns it on | |
10243 | once the first time it's called. | |
10244 | ||
10245 | ------------------------------------------------------------------------------ | |
10246 | This file documents the changes between this version, bash-2.0-alpha2, | |
10247 | and the previous version, bash-2.0-alpha. | |
10248 | ||
10249 | 1. Changes to Bash | |
10250 | ||
10251 | a. The shell no longer thinks directories are executable. | |
10252 | ||
10253 | b. `disown' has a new option, `h', which inhibits the resending of SIGHUP | |
10254 | but does not remove the job from the jobs table. | |
10255 | ||
10256 | c. The varargs functions in error.c now use ANSI-C `stdarg' if available. | |
10257 | ||
10258 | d. The build process now treats the `build version' in .build as local to | |
10259 | the build directory, so different versions built from the same source | |
10260 | tree have different `build versions'. | |
10261 | ||
10262 | e. Some problems with the grammar have been fixed. (It used `list' in a few | |
10263 | productions where `compound_list' was needed. A `list' must be terminated | |
10264 | with a newline or semicolon; a `compound_list' need not be.) | |
10265 | ||
10266 | f. A fix was made to keep `wait' from hanging when waiting for all background | |
10267 | jobs. | |
10268 | ||
10269 | g. `bash --help' now writes its output to stdout, like the GNU Coding Standards | |
10270 | specify, and includes the machine type (the value of MACHTYPE). | |
10271 | ||
10272 | h. `bash --version' now prints more information and exits successfully, like | |
10273 | the GNU Coding Standards specify. | |
10274 | ||
10275 | i. The output of `time' and `times' now prints fractional seconds with three | |
10276 | places after the decimal point. | |
10277 | ||
10278 | j. A bug that caused process substitutions to screw up the pipeline printed | |
10279 | by `jobs' was fixed. | |
10280 | ||
10281 | k. Fixes were made to the code that implements $'...' and $"..." so they | |
10282 | work as documented. | |
10283 | ||
10284 | l. The process substitution code now opens named pipes for reading with | |
10285 | O_NONBLOCK to avoid hanging. | |
10286 | ||
10287 | m. Fixes were made to the trap code so the shell cleans up correctly if the | |
10288 | trap command contains a `return' and we're executing a function or | |
10289 | sourcing a script with `.'. | |
10290 | ||
10291 | n. Fixes to doc/Makefile.in so that it doesn't try to remake all of the | |
10292 | documentation (ps, dvi, etc.) on a `make install'. | |
10293 | ||
10294 | o. Fixed an auto-increment error that caused bash -c args to sometimes dump | |
10295 | core. | |
10296 | ||
10297 | p. Fixed a bug that caused $HISTIGNORE to fail when the history line | |
10298 | contained globbing characters. | |
10299 | ||
10300 | 2. Changes to Readline | |
10301 | ||
10302 | a. There is a new string variable, rl_library_version, available for use by | |
10303 | applications. The current value is "2.1". | |
10304 | ||
10305 | b. A bug encountered when expand-tilde was enabled and file completion was | |
10306 | attempted on a word beginning with `~/' was fixed. | |
10307 | ||
10308 | c. A slight change was made to the incremental search termination behavior. | |
10309 | ESC still terminates the search, but if input is pending or arrives | |
10310 | within 0.1 seconds (on systems with select(2)), it is used as a prefix | |
8868edaf | 10311 | character. This is intended to allow users to terminate searches with |
ccc6cda3 | 10312 | the arrow keys and get the behavior they expect. |