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1442f67c CR |
1 | This document details the changes between this version, bash-4.3-beta, and the |
2 | previous version, bash-4.3-alpha. | |
3 | ||
4 | 1. Changes to Bash | |
5 | ||
6 | a. Fixed a bug in the prompt directory name "trimming" code that caused | |
7 | memory corruption and garbled the results. | |
8 | ||
9 | b. Fixed a bug that caused single quotes that resulted from $'...' quoting | |
10 | in the replacement portion of a double-quoted ${word/pat/rep} expansion | |
11 | to be treated as quote characters. | |
12 | ||
13 | c. Fixed a bug that caused assignment statements preceding a command word to | |
14 | result in assignment statements following a declaration command to not be | |
15 | expanded like assignment statements. | |
16 | ||
17 | d. Fixed a bug with variable search order in the presence of local variables | |
18 | with the same name as variables in the temporary environment supplied to | |
19 | a shell function. | |
20 | ||
21 | e. Fixed a bug that caused constructs like 1<(2) to be interpreted as process | |
22 | substitutions even in an arithmetic context. | |
23 | ||
24 | f. Fixed several cases where `invisible' variables (variables with attributes | |
25 | but no values, which are technically unset) were treated incorrectly. | |
26 | ||
27 | g. Fixed a bug that caused group commands in pipelines that were not the | |
28 | last element to not run the EXIT trap. | |
29 | ||
30 | h. Fixed a bug that caused `unset -n' to not unset a nameref variable in | |
31 | certain cases. | |
32 | ||
33 | i. Fixed the nameref circular reference checking to be less strict and only | |
34 | disallow a nameref variable with the same value as its name at the global | |
35 | scope. | |
36 | ||
37 | j. Fixed a bug that caused trap handlers to be executed recursively, | |
38 | corrupting internal data structures. | |
39 | ||
40 | k. Fixed a bug that could result in bash not compiling if certain options were | |
41 | not enabled. | |
42 | ||
43 | l. Fixed a bug that caused the arithmetic expansion code to attempt variable | |
44 | assignments when operator precedence prohibited them. | |
45 | ||
46 | m. Word expansions like ${foo##bar} now understand indirect variable references. | |
47 | ||
48 | n. Fixed a bug that caused `declare -fp name' to not display a function | |
49 | definition. | |
50 | ||
51 | o. Fixed a bug that caused asynchronous child processes to modify the stdin | |
52 | file pointer when bash was using it to read a script, which modified the | |
53 | parent's value as well. | |
54 | ||
55 | 2. Changes to Readline | |
56 | ||
57 | a. Fixed a bug in vi mode that caused the arrow keys to set the saved last | |
58 | vi-mode command to the wrong value. | |
59 | ||
60 | b. Fixed a bug that caused double-quoted strings to be scanned incorrectly | |
61 | when being used as the value of a readline variable assignment. | |
62 | ||
63 | c. Fixed a bug with vi mode that prevented `.' from repeating a command | |
64 | entered on a previous line (command). | |
65 | ||
66 | d. Fixed a bug that could cause completion to core dump if it was interrupted | |
67 | by a signal. | |
68 | ||
69 | e. Readline now sends the meta-key enable string to the terminal if the | |
70 | terminal has been successfully initialized. | |
71 | ||
72 | f. Readline now calls the signal hook after resizing the terminal when it | |
73 | receives a SIGWINCH. | |
74 | ||
75 | g. Fixed a bug that could cause the history list code to perform an out-of- | |
76 | bounds array reference if the history list is empty. | |
77 | ||
78 | 3. New Features in Bash | |
79 | ||
80 | a. Shells started to run process substitutions now run any trap set on EXIT. | |
81 | ||
82 | b. There is now a configure-time option to enable the globasciiranges option | |
83 | by default. | |
84 | ||
85 | c. The read builtin now checks its first variable argument for validity before | |
86 | trying to read any input. | |
87 | ||
88 | ------------------------------------------------------------------------------ | |
b721485f CR |
89 | This document details the changes between this version, bash-4.3-alpha, |
90 | and the previous version, bash-4.2-release. | |
91 | ||
92 | 1. Changes to Bash | |
93 | ||
94 | a. Fixed several bugs concerning incomplete bracket expressions in filename | |
95 | generation (globbing) patterns. | |
96 | ||
97 | b. Fixed a bug with single quotes and WORD in ${param op WORD} when running | |
98 | in Posix mode. | |
99 | ||
100 | c. Fixed a bug that caused the pattern removal and pattern substitution word | |
101 | expansions and case statement word expansion to not match the empty string. | |
102 | ||
103 | d. Fixed a bug that caused the tzset() function to not work after changing | |
104 | the TZ enviroment variable. | |
105 | ||
106 | e. Fixed a bug that caused the RHS of an assignment statement to undergo | |
107 | word splitting when it contained an unquoted $@. | |
108 | ||
109 | f. Fixed bugs that caused the shell to not react to a SIGINT sent while | |
110 | waiting for a child process to exit. | |
111 | ||
112 | g. Bash doesn't try to run things in a signal handler context when it gets a | |
113 | signal (SIGINT/SIGHUP/etc) while reading input using readline but still | |
114 | be responsive to terminating signals. | |
115 | ||
116 | h. Fixed a bug that caused bash to go into an infinite loop if a filename | |
117 | to be matched contained an invalid multibyte character. | |
118 | ||
119 | i. Fixed a bug that caused PS4 to end up being truncated if it is longer | |
120 | than 128 bytes. | |
121 | ||
122 | j. Fixed a bug that caused brace expansion to not skip over double-quoted | |
123 | command substitution. | |
124 | ||
125 | k. System-specific updates for: DJGPP, HP/UX, Mac OS X | |
126 | ||
127 | l. Fixed a bug in displaying commands that caused redirections to be associated | |
128 | with the wrong part of the command. | |
129 | ||
130 | m. Fixed the coproc cleanup to unset the appropriate shell variables when a | |
131 | coproc terminates. | |
132 | ||
133 | n. Fixed a bug that caused `fc' to dump core due to incorrect calculation of | |
134 | the last history entry. | |
135 | ||
136 | o. Added workarounds for FreeBSD's implementation of faccessat/eaccess and | |
137 | `test -x'. | |
138 | ||
139 | p. Fixed a bug that caused the shell to not match patterns containing | |
140 | control-A. | |
141 | ||
142 | q. Fixed a bug that could result in doubled error messages when the `printf' | |
143 | builtin got a write error. | |
144 | ||
145 | r. Fixed a bug that caused the shell to not correctly expand words containing | |
146 | multiple consecutive quoted empty strings (""""""aa). | |
147 | ||
148 | s. Fixed a bug that caused the shell to not correctly parse multi-line | |
149 | process substitutions containing comments and quoted strings. | |
150 | ||
151 | t. Fixed a problem with the bash malloc's internal idea of the top of the | |
152 | memory heap that resulted in incorrect decisions to try to reduce the | |
153 | break and give memory back to the kernel. | |
154 | ||
155 | u. There are changes to the expansions peformed on compound array assignments, | |
156 | in an effort to make foo=( [ind1]=bar [ind2]=baz ) identical to | |
157 | foo[ind1]=bar foo[ind2]=baz. | |
158 | ||
159 | v. Bash now reports an error if `read -a name' is used when `name' is an | |
160 | existing associative array. | |
161 | ||
162 | w. Fixed a bug that allowed an attempted assignment to a readonly variable | |
163 | in an arithmetic expression to not return failure. | |
164 | ||
165 | x. Fixed several bugs that caused completion functions to be invoked even when | |
166 | the cursor was before the first word in the command. | |
167 | ||
168 | y. Fixed a bug that caused parsing a command substitution to overwrite the | |
169 | parsing state associated with the complete input line. | |
170 | ||
171 | z. Fixed several bugs with the built-in snprintf replacement and field widths | |
172 | and floating point. | |
173 | ||
174 | aa. Fixed a bug that caused incorrect offset calculations and input buffer | |
175 | corruption when reading files longer than 2^31 bytes. | |
176 | ||
177 | bb. Fixed several bugs where bash performed arithmetic evaluation in contexts | |
178 | where evaluation is suppressed. | |
179 | ||
180 | cc. Fixed a bug that caused bash to close FIFOs used for process substitution | |
181 | too early when a shell function was executing, but protect against using | |
182 | all file descriptors when the shell functions are invoked inside loops. | |
183 | ||
184 | dd. Added checks for printable (and non-printable) multibyte characters for | |
185 | use in error messages. | |
186 | ||
187 | ee. Fixed a bug that caused ^O (operate-and-get-next) to not work correctly | |
188 | at the end of the history list. | |
189 | ||
190 | ff. Fixed a bug that caused command-oriented history to incorrectly combine | |
191 | here documents into one line. | |
192 | ||
193 | gg. Fixed a bug that caused importing SHELLOPTS from the environment into a | |
194 | Posix-mode shell to print an error message and refuse to parse it. | |
195 | ||
196 | hh. Fixed a bug that caused the shell to delete an extra history entry when | |
197 | using `history -s'. | |
198 | ||
199 | ii. Fixed a bug that caused floating-point exceptions and overflow errors | |
200 | for the / and % arithmetic operators when using INTMAX_MIN and -1. | |
201 | ||
202 | jj. Fixed a bug that caused parsing errors when reading an arithmetic for | |
203 | loop inside a command substitution. | |
204 | ||
205 | kk. Fixed a bug that caused a readonly function to be unset when unset was | |
206 | called without the -f or -v option. | |
207 | ||
208 | ll. Fixed several bugs in the code that quotes characters special to regular | |
209 | expressions when used in a quoted string on the RHS of the =~ operator | |
210 | to the [[ command. | |
211 | ||
212 | mm. Fixed a bug that caused redirections to fail because the file descriptor | |
213 | limit was set to a value less than 10. | |
214 | ||
215 | nn. Fixed a bug that caused the `read' builtin to execute code in a signal | |
216 | handler context if read timed out. | |
217 | ||
218 | oo. Fixed a bug that caused extended globbing patterns to not match files | |
219 | beginning with `.' correctly when a `.' was explicitly supplied in the | |
220 | pattern. | |
221 | ||
222 | pp. Fixed a bug that caused key sequences longer than two characters to not | |
223 | work when used with `bind -x'. | |
224 | ||
225 | qq. Fixed a bug that resulted in redefined functions having the wrong source | |
226 | file names in BASH_SOURCE. | |
227 | ||
228 | rr. Fixed a bug that caused the read builtin to assign null strings to variables | |
229 | when using `read -N', which caused core dumps when referenced | |
230 | ||
231 | ss. Fixed a bug that caused `bash -m script' to not enable job control while | |
232 | running the script. | |
233 | ||
234 | tt. Fixed a bug that caused `printf -v var' to dump core when used with the | |
235 | %b format code. | |
236 | ||
237 | uu. Fixed a bug that caused the shell to exit with the wrong status if -e was | |
238 | active and the shell exited on a substitution error. | |
239 | ||
240 | vv. Fixed a bug that caused the shell to seg fault if an array variable with | |
241 | the same name as an existing associative array was implicitly created by | |
242 | an assignment (declare a[n]=b). | |
243 | ||
244 | ww. Fixed a bug that caused a redirection to misbehave if the number specified | |
245 | for a file descriptor overflows an intmax_t. | |
246 | ||
247 | xx. Fixed several bugs with the handling of valid and invalid unicode character | |
248 | values when used with the \u and \U escape sequences to printf and $'...'. | |
249 | ||
250 | yy. Fixed a bug that caused tildes to not be escaped in expanded filenames, | |
251 | making them subject to later expansion. | |
252 | ||
253 | zz. When using the pattern substitution word expansion, bash now runs the | |
254 | replacement string through quote removal, since it allows quotes in that | |
255 | string to act as escape characters. This is not backwards compatible, so | |
256 | it can be disabled by setting the bash compatibility mode to 4.2. | |
257 | ||
258 | aaa. Fixed the rest of the cases where the shell runs non-allowed code in a | |
259 | signal handler context. | |
260 | ||
261 | bbb. Fixed a bug that caused spurious DEL characters (\177) to appear in | |
262 | double-quoted expansion where the RHS is evaluated to the empty string. | |
263 | ||
264 | ccc. Fixed a bug that caused the use of the shell's internal random number | |
265 | generator for temporary file names to perturb the random number | |
266 | sequence. | |
267 | ||
268 | ddd. Fixed several bugs that caused `declare -g' to not set the right global | |
269 | variables or to misbehave when declaring global indexed arrays. | |
270 | ||
271 | eee. Fixed a logic bug that caused extended globbing in a multibyte locale to | |
272 | cause failures when using the pattern substititution word expansions. | |
273 | ||
274 | fff. Fixed a bug that caused the `lastpipe' option to corrupt the file | |
275 | descriptor used to read the script. | |
276 | ||
277 | ggg. Fixed a bug that causes the shell to delete DEL characters in the | |
278 | expanded value of variables used in the same quoted string as variables | |
279 | that expand to nothing. | |
280 | ||
281 | hhh. Fixed a bug that caused the shell to assign the wrong value from an | |
282 | assignment like (( x=7 )) when `x' was an existing array variable. | |
283 | ||
284 | iii. Fixed a bug that caused the shell to misbehave when generating sequences | |
285 | and the boundary values overflow an intmax_t. | |
286 | ||
287 | jjj. Fixed a bug caused expansion errors if an expansion of "$@" appeared | |
288 | next to another expansion (e.g.. "${@}${x}"). | |
289 | ||
290 | kkk. Fixed a potential buffer overflow bug when performing /dev/fd expansion. | |
291 | ||
292 | lll. Fixed a bug that resulted in an extra semicolon being added to compound | |
293 | assignments when they were added to the history list. | |
294 | ||
295 | mmm. Fixed a bug that caused mapfile to read one extra line from the input. | |
296 | ||
297 | nnn. Fixed a bug that caused the mail checking code to use uninitialized | |
298 | values. | |
299 | ||
300 | ooo. Fixed a bug that prevented history timestamps from being saved if the | |
301 | history comment character is unset. | |
302 | ||
303 | ppp. Fixed a bug that caused the case-modifying expansions to not work with | |
304 | multibyte characters. | |
305 | ||
306 | qqq. Fixed a bug that caused the edit-and-execute bindable readline command | |
307 | to see the wrong data if invoked in the middle of a multi-line quoted | |
308 | string. | |
309 | ||
310 | rrr. Fixed a bug that resulted in the shell returning the wrong exit status | |
311 | for a background command on systems that recycle PIDs very quickly. | |
312 | ||
313 | sss. Fixed a bug that caused asynchronous group commands to not run any EXIT | |
314 | trap defined in the body of the command. | |
315 | ||
316 | ttt. Fixed a bug that caused `eval "... ; return"' to not clean up properly. | |
317 | ||
318 | uuu. Fixed a bug that caused the shell to dump core if `read' reads an escaped | |
319 | IFS whitespace character. | |
320 | ||
321 | vvv. Fixed a bug that caused BASH_COMMAND to be set to an incorrect value when | |
322 | executing a (...) subshell. | |
323 | ||
324 | www. Fixed a couple of pointer aliasing bugs with the token string in arithmetic | |
325 | evaluation. | |
326 | ||
327 | xxx. Fixed a bug with parsing multi-line command substitutions when reading | |
328 | the `do' keyword followed by whitespace. | |
329 | ||
330 | yyy. Fixed a bug that caused the shell to seg fault if the time given to the | |
331 | printf %(...)T format overflowed the value accepted by localtime(3). | |
332 | ||
333 | zzz. Fixed a problem with displaying help topics in two columns when the | |
334 | translated text contained multibyte characters. | |
335 | ||
336 | aaaa. Fixed a bug with the extended globbing pattern matcher where a `*' was | |
337 | followed by a negated extended glob pattern. | |
338 | ||
339 | bbbb. Fixed a race condition with short-lived coproc creation and reaping that | |
340 | caused the child process to be reaped before the various coproc shell | |
341 | variables were initialized. | |
342 | ||
343 | cccc. Fixed a bug where turning off `errexit' in command substitution subshells | |
344 | was not reflected in $SHELLOPTS. | |
345 | ||
346 | dddd. Partially fixed an inconsistency in how the shell treated shell | |
347 | functions run from an EXIT trap. | |
348 | ||
349 | eeee. Fixed a bug in how the shell invalidated FIFOs used for process | |
350 | substitution when executing a pipeline (once rather than in every child). | |
351 | ||
352 | ffff. Fixed a bug that occurred when expanding a special variable ($@, $*) | |
353 | within double quotes and the expansion resulted in an empty string. | |
354 | ||
355 | gggg. Fixed bugs with executing a SIGCHLD trap handler to make sure that it's | |
356 | executed once per exited child. | |
357 | ||
358 | hhhh. Fixed a bug that caused `declare' and `test' to find variables that | |
359 | had been given attributes but not assigned values. Such variables are | |
360 | not set. | |
361 | ||
362 | iiii. Fixed a bug that caused commands in process substitutions to not look in | |
363 | the local temporary environment when performing word expansions. | |
364 | ||
365 | jjjj. Fixed several problems with globstar expansions (**/**) returning null | |
366 | filenames and multiple instances of the same pathname. | |
367 | ||
368 | kkkk. Fixed an oversight that did not allow the exit status of `coproc' to | |
369 | be inverted using `!'. | |
370 | ||
371 | llll. Fixed a bug that caused the -e option to be re-enabled using `set -e' | |
372 | even when executing in a context where -e is ignored. | |
373 | ||
374 | mmmm. Fixed a (mostly theoretical) bug with input lines longer than SIZE_MAX. | |
375 | ||
376 | nnnn. Fixed a bug that could result in double evaluation of command | |
377 | substitutions when they appear in failed redirections. | |
378 | ||
379 | oooo. Fixed a bug that could cause seg faults during `mapfile' callbacks if | |
380 | the callback unsets the array variable mapfile is using. | |
381 | ||
382 | pppp. Fixed several problems with variable assignments using ${var:=value} | |
383 | when the variable assignment is supposed to have side effects. | |
384 | ||
385 | qqqq. Fixed a bug that caused a failure of an assignment statement preceding a | |
386 | builtin caused the next invocation of a special builtin to exit the shell. | |
387 | ||
388 | rrrr. Fixed several problems with IFS when it appears in the temporary environment | |
389 | and is used in redirections. | |
390 | ||
391 | ssss. Fixed a problem that caused IFS changes using ${IFS:=value} to modify | |
392 | how preceding expansions were split. | |
393 | ||
394 | tttt. Fixed a problem that caused subshells to not run an EXIT trap they set. | |
395 | ||
396 | uuuu. Fixed a problem that caused shells started in posix mode to attempt to | |
397 | import shell functions with invalid names from the environment. We now | |
398 | print a warning. | |
399 | ||
400 | vvvv. Worked around a kernel problem that caused SIGCHLD to interrupt open(2) | |
401 | on a FIFO used for process substitution, even if the SIGCHLD handler was | |
402 | installed with the SA_RESTART flag. | |
403 | ||
404 | wwww. Fixed a problem that resulted in inconsistent expansion of $* and ${a[*]}. | |
405 | ||
406 | xxxx. Fixed a problem that caused `read -t' to crash when interrupted by | |
407 | SIGINT. | |
408 | ||
409 | yyyy. Fixed a problem that caused pattern removal to fail randomly because the | |
410 | pattern matcher read beyond the end of a string. | |
411 | ||
412 | zzzz. Fixed a bug that caused core dumps when shell functions tried to create | |
413 | local shadow copies of special variables like GROUPS. | |
414 | ||
415 | aaaaa. Fixed a bug that caused SIGTERM to be occasionally lost by children of | |
416 | interactive shells when it arrived before the child process reset the | |
417 | handler from SIG_DFL. | |
418 | ||
419 | bbbbb. Fixed a bug that caused redirections like <&n- to leave file descriptor | |
420 | n closed if executed with a builtin command. | |
421 | ||
422 | ccccc. Fixed a bug that caused incorrect completion quoting when completing a | |
423 | word containing a globbing character with `show-all-if-ambiguous' set. | |
424 | ||
1442f67c CR |
425 | ddddd. Fixed a bug that caused printf's %q format specifier not to quote a |
426 | tilde even if it appeared in a location where it would be subject to | |
427 | tilde expansion. | |
428 | ||
b721485f CR |
429 | 2. Changes to Readline |
430 | ||
431 | a. Fixed a bug that did not allow the `dd', `cc', or `yy' vi editing mode | |
432 | commands to work on the entire line. | |
433 | ||
434 | b. Fixed a bug that caused redisplay problems with prompts longer than 128 | |
435 | characters and history searches. | |
436 | ||
437 | c. Fixed a bug that caused readline to try and run code to modify its idea | |
438 | of the screen size in a signal handler context upon receiving a SIGWINCH. | |
439 | ||
440 | d. Fixed a bug that caused the `meta' key to be enabled beyond the duration | |
441 | of an individual call top readline(). | |
442 | ||
443 | e. Added a workaround for a wcwidth bug in Mac OS X that caused readline's | |
444 | redisplay to mishandle zero-width combining characters. | |
445 | ||
446 | f. Fixed a bug that caused readline to `forget' part of a key sequence when | |
447 | a multiple-key sequence caused it to break out of an incremental search. | |
448 | ||
449 | g. Fixed bugs that caused readline to execute code in a signal handler | |
450 | context if interrupted while reading from the file system during completion. | |
451 | ||
452 | h. Fixed a bug that caused readline to `forget' part of a key sequence when | |
453 | reading an unbound multi-character key sequence. | |
454 | ||
455 | i. Fixed a bug that caused Readline's signal handlers to be installed beyond | |
456 | the bounds of a single call to readline(). | |
457 | ||
458 | j. Fixed a bug that caused the `.' command to not redo the most recent `R' | |
459 | command in vi mode. | |
460 | ||
461 | k. Fixed a bug that caused ignoring case in completion matches to result in | |
462 | readline using the wrong match. | |
463 | ||
464 | l. Paren matching now works in vi insert mode. | |
465 | ||
466 | m. Fix menu-completion to make show-all-if-ambiguous and menu-complete-display-prefix | |
467 | work together. | |
468 | ||
469 | n. Fixed a bug that didn't allow the `cc', `dd', or `yy' commands to be redone | |
470 | in vi editing mode. | |
471 | ||
472 | o. Fixed a bug that caused the filename comparison code to not compare | |
473 | multibyte characters correctly when using case-sensitive or case-mapping | |
474 | comparisons. | |
475 | ||
476 | p. Fixed the input reading loop to call the input hook function only when there | |
477 | is no terminal input available. | |
478 | ||
479 | q. Fixed a bug that caused binding a macro to a multi-character key sequence | |
480 | where the sequence and macro value share a common prefix to not perform | |
481 | the macro replacement. | |
482 | ||
483 | r. Fixed several redisplay errors with multibyte characters and prompts | |
484 | containing invisible characters when using horizontal scrolling. | |
485 | ||
486 | s. Fixed a bug that caused redisplay errors when trying to overwrite | |
487 | existing characters using multibyte characters. | |
488 | ||
489 | 3. New Features in Bash | |
490 | ||
491 | a. The `helptopic' completion action now maps to all the help topics, not just | |
492 | the shell builtins. | |
493 | ||
494 | b. The `help' builtin no longer does prefix substring matching, so `help read' | |
495 | does not match `readonly'. | |
496 | ||
497 | c. The shell can be compiled to not display a message about processes that | |
498 | terminate due to SIGTERM. | |
499 | ||
500 | d. Non-interactive shells now react to the setting of checkwinsize and set | |
501 | LINES and COLUMNS after a foreground job exits. | |
502 | ||
503 | e. There is a new shell option, `globasciiranges', which, when set to on, | |
504 | forces globbing range comparisons to use character ordering as if they | |
505 | were run in the C locale. | |
506 | ||
507 | f. There is a new shell option, `direxpand', which makes filename completion | |
508 | expand variables in directory names in the way bash-4.1 did. | |
509 | ||
510 | g. In Posix mode, the `command' builtin does not change whether or not a | |
511 | builtin it shadows is treated as an assignment builtin. | |
512 | ||
513 | h. The `return' and `exit' builtins accept negative exit status arguments. | |
514 | ||
515 | i. The word completion code checks whether or not a filename containing a | |
516 | shell variable expands to a directory name and appends `/' to the word | |
517 | as appropriate. The same code expands shell variables in command names | |
518 | when performing command completion. | |
519 | ||
520 | j. In Posix mode, it is now an error to attempt to define a shell function | |
521 | with the same name as a Posix special builtin. | |
522 | ||
523 | k. When compiled for strict Posix conformance, history expansion is disabled | |
524 | by default. | |
525 | ||
526 | l. The history expansion character (!) does not cause history expansion when | |
527 | followed by the closing quote in a double-quoted string. | |
528 | ||
529 | m. `complete' and its siblings compgen/compopt now takes a new `-o noquote' | |
530 | option to inhibit quoting of the completions. | |
531 | ||
532 | n. Setting HISTSIZE to a value less than zero causes the history list to be | |
533 | unlimited (setting it 0 zero disables the history list). | |
534 | ||
535 | o. Setting HISTFILESIZE to a value less than zero causes the history file size | |
536 | to be unlimited (setting it to 0 causes the history file to be truncated | |
537 | to zero size). | |
538 | ||
539 | p. The `read' builtin now skips NUL bytes in the input. | |
540 | ||
541 | q. There is a new `bind -X' option to print all key sequences bound to Unix | |
542 | commands. | |
543 | ||
544 | r. When in Posix mode, `read' is interruptible by a trapped signal. After | |
545 | running the trap handler, read returns 128+signal and throws away any | |
546 | partially-read input. | |
547 | ||
548 | s. The command completion code skips whitespace and assignment statements | |
549 | before looking for the command name word to be completed. | |
550 | ||
551 | t. The build process has a new mechanism for constructing separate help files | |
552 | that better reflects the current set of compilation options. | |
553 | ||
554 | u. The -nt and -ot options to test now work with files with nanosecond | |
555 | timestamp resolution. | |
556 | ||
557 | v. The shell saves the command history in any shell for which history is | |
558 | enabled and HISTFILE is set, not just interactive shells. | |
559 | ||
560 | w. The shell has `nameref' variables and new -n(/+n) options to declare and | |
561 | unset to use them, and a `test -R' option to test for them. | |
562 | ||
563 | x. The shell now allows assigning, referencing, and unsetting elements of | |
564 | indexed arrays using negative subscripts (a[-1]=2, echo ${a[-1]}) which | |
565 | count back from the last element of the array. | |
566 | ||
567 | y. The {x}<word redirection feature now allows words like {array[ind]} and | |
568 | can use variables with special meanings to the shell (e.g., BASH_XTRACEFD). | |
569 | ||
570 | z. There is a new CHILD_MAX special shell variable; its value controls the | |
571 | number of exited child statues the shell remembers. | |
572 | ||
573 | aa. There is a new configuration option (--enable-direxpand-default) that | |
574 | causes the `direxpand' shell option to be enabled by default. | |
575 | ||
576 | bb. Bash does not do anything special to ensure that the file descriptor | |
577 | assigned to X in {x}<foo remains open after the block containing it | |
578 | completes. | |
579 | ||
580 | cc. The `wait' builtin has a new `-n' option to wait for the next child to | |
581 | change status. | |
582 | ||
583 | dd. The `printf' %(...)T format specifier now uses the current time if no | |
584 | argument is supplied. | |
585 | ||
586 | ee. There is a new variable, BASH_COMPAT, that controls the current shell | |
587 | compatibility level. | |
588 | ||
589 | ff. The `popd' builtin now treats additional arguments as errors. | |
590 | ||
591 | gg. The brace expansion code now treats a failed sequence expansion as a | |
592 | simple string and will continue to expand brace terms in the remainder | |
593 | of the word. | |
594 | ||
595 | 4. New Features in Readline | |
596 | ||
597 | a. Readline is now more responsive to SIGHUP and other fatal signals when | |
598 | reading input from the terminal or performing word completion but no | |
599 | longer attempts to run any not-allowable functions from a signal handler | |
600 | context. | |
601 | ||
602 | b. There are new bindable commands to search the history for the string of | |
603 | characters between the beginning of the line and the point | |
604 | (history-substring-search-forward, history-substring-search-backward) | |
605 | ||
606 | c. Readline allows quoted strings as the values of variables when setting | |
607 | them with `set'. As a side effect, trailing spaces and tabs are ignored | |
608 | when setting a string variable's value. | |
609 | ||
610 | d. The history library creates a backup of the history file when writing it | |
611 | and restores the backup on a write error. | |
612 | ||
613 | e. New application-settable variable: rl_filename_stat_hook: a function called | |
614 | with a filename before using it in a call to stat(2). Bash uses it to | |
615 | expand shell variables so things like $HOME/Downloads have a slash | |
616 | appended. | |
617 | ||
618 | f. New bindable function `print-last-kbd-macro', prints the most-recently- | |
619 | defined keyboard macro in a reusable format. | |
620 | ||
621 | g. New user-settable variable `colored-stats', enables use of colored text | |
622 | to denote file types when displaying possible completions (colored analog | |
623 | of visible-stats). | |
624 | ||
625 | h. New user-settable variable `keyseq-timout', acts as an inter-character | |
626 | timeout when reading input or incremental search strings. | |
627 | ||
628 | i. New application-callable function: rl_clear_history. Clears the history list | |
629 | and frees all readline-associated private data. | |
630 | ||
631 | j. New user-settable variable, show-mode-in-prompt, adds a characters to the | |
632 | beginning of the prompt indicating the current editing mode. | |
633 | ||
634 | k. New application-settable variable: rl_input_available_hook; function to be | |
635 | called when readline detects there is data available on its input file | |
636 | descriptor. | |
637 | ||
1442f67c CR |
638 | l. Readline calls an application-set event hook (rl_signal_event_hook) after |
639 | it gets a signal while reading input (read returns -1/EINTR but readline | |
640 | does not handle the signal immediately) to allow the application to handle | |
641 | or otherwise note it. Not currently called for SIGHUP or SIGTERM. | |
b721485f CR |
642 | |
643 | m. If the user-settable variable `history-size' is set to a value less than | |
644 | 0, the history list size is unlimited. | |
645 | ||
b721485f | 646 | ------------------------------------------------------------------------------ |
e3af9370 CR |
647 | This document details the changes between this version, bash-4.2-release, |
648 | and the previous version, bash-4.2-rc2. | |
649 | ||
650 | 1. Changes to Bash | |
651 | ||
652 | a. Fixed a bug that caused some variables to be clobbered by a longjmp, | |
653 | resulting in stack corruption. | |
654 | ||
655 | ------------------------------------------------------------------------------ | |
deeba0d2 CR |
656 | This document details the changes between this version, bash-4.2-rc2, |
657 | and the previous version, bash-4.2-rc1. | |
658 | ||
659 | 1. Changes to Bash | |
660 | ||
661 | a. Changes to bash_directory_completion_hook so that it's assigned to the | |
662 | readline rl_directory_rewrite_hook variable, which modifies the directory | |
663 | name passed to opendir without modifying the directory name the user | |
664 | typed. | |
665 | ||
f894a2d3 | 666 | b. Fixed bug in select builtin that caused it to not terminate correctly if |
deeba0d2 CR |
667 | the read timed out due to $TMOUT. |
668 | ||
f894a2d3 CR |
669 | c. Fixed a problem that resulted in non-repeatable sequences of random |
670 | numbers when RANDOM=0. | |
671 | ||
deeba0d2 | 672 | ------------------------------------------------------------------------------ |
54a1fa7c CR |
673 | This document details the changes between this version, bash-4.2-rc1, |
674 | and the previous version, bash-4.2-beta. | |
675 | ||
676 | 1. Changes to Bash | |
677 | ||
678 | a. Fixed a bug that caused some redirection errors to leak file descriptors. | |
679 | ||
680 | b. Fixed a bug that caused unary `+' and `-' arithmetic operators to have a | |
681 | higher precedence than unary `!' and `~'. | |
682 | ||
683 | c. Fixed a bug that caused simple commands in a pipeline to affect the exit | |
684 | status ($?) seen by subsequent pipeline commands. | |
685 | ||
9fc76425 CR |
686 | d. A number of cygwin-specific changes to avoid the use of text-mode files |
687 | and file access, and to make sure that \r is handled correctly. | |
688 | ||
689 | e. Fixed a bug that caused the read builtin to not return failure if an | |
690 | attempt is made to assign to a readonly variable. | |
691 | ||
692 | f. Fixed a bug that caused some builtin usage messages to not be translated. | |
693 | ||
694 | g. Fixed a bug that caused the getopts builtin to not return failure if an | |
695 | attempt is made to assign to a readonly variable. Now it returns 2. | |
696 | ||
697 | h. Fixed the cd and pwd builtins to return failure if PWD is readonly and | |
698 | cannot be assigned to. | |
699 | ||
700 | i. Added code to check the return value of access(2) on Solaris systems, | |
701 | since it returns success for executable tests (e.g., `test -x') when | |
702 | run by root, even if the file permissions don't allow execution. | |
703 | ||
54a1fa7c CR |
704 | 2. Changes to Readline |
705 | ||
9fc76425 CR |
706 | a. Fixed a bug that caused directory names in words to be completed to not |
707 | be dequoted correctly. | |
708 | ||
54a1fa7c CR |
709 | 3. New Features in Bash |
710 | ||
711 | 4. New Features in Readline | |
712 | ||
713 | ------------------------------------------------------------------------------ | |
510e20a2 CR |
714 | This document details the changes between this version, bash-4.2-beta, |
715 | and the previous version, bash-4.2-alpha. | |
716 | ||
717 | 1. Changes to Bash | |
718 | ||
719 | a. Fixed a bug that caused the \W prompt string escape to not add a closing | |
720 | NULL. | |
721 | ||
722 | b. Fixed a bug that caused partially-quoted words that were not subject to | |
723 | word splitting to retained quoted NULLs. | |
724 | ||
725 | c. Added considerable efficiency speedups when pattern matching in multibyte | |
726 | locales by skipping multibyte character functions where possible. | |
727 | ||
728 | d. Added considerable speedups to variable expansion when in multibyte locales. | |
729 | ||
730 | e. Fixed a bug that caused the expansion of $* when there are no positional | |
731 | parameters to cause the shell to dump core when used in a pattern | |
732 | matching context. | |
733 | ||
734 | f. Fixed a bug that caused variable expansions preceding regular builtins to | |
735 | not change the shell environment during their execution. | |
736 | ||
737 | 2. Changes to Readline | |
738 | ||
739 | a. Fixed a bug that made an explicit argument of 0 to yank-last-arg behave | |
740 | as if it were a negative argument. | |
741 | ||
742 | ------------------------------------------------------------------------------ | |
e05be32d CR |
743 | This document details the changes between this version, bash-4.2-alpha, |
744 | and the previous version, bash-4.1-release. | |
745 | ||
746 | 1. Changes to Bash | |
747 | ||
748 | a. Fixed a bug in the parser when processing alias expansions containing | |
749 | quoted newlines. | |
750 | ||
751 | b. Fixed a memory leak in associative array expansion. | |
752 | ||
753 | c. Fixed a bug that caused quoted here-strings to be requoted when printed. | |
754 | ||
755 | d. Fixed a bug in arithmetic expansion that caused the index in an array | |
756 | expansion to be evaluated twice under certain circumstances. | |
757 | ||
758 | e. Fixed several bugs with the expansion and display of variables that have | |
759 | been given attributes but not values and are technically unset. | |
760 | ||
761 | f. Fixed a bug that caused core dumps when using filename completion that | |
762 | expands to a filename containing a globbing character. | |
763 | ||
764 | g. Fixed a bug that caused assignment statements preceding a special builtin | |
765 | when running in Posix mode to not persist after the builtin completed | |
766 | when the special builtin was executed in a shell function without any | |
767 | local variables. | |
768 | ||
769 | h. Fixed a bug that caused a command to remain in the hash table even after | |
770 | `hash command' did not find anything if there was already an existing | |
771 | hashed pathname. | |
772 | ||
773 | i. Fixed several bugs caused by executing unsafe functions from a signal | |
774 | handler in the cases where a signal handler is executed immediately | |
775 | rather than setting a flag for later execution. | |
776 | ||
777 | j. Fixed a bug that caused some internal flag variables to be set | |
778 | incorrectly if `read -t' timed out. | |
779 | ||
780 | k. Fixed a Posix compatibility issue by making sure that a backslash escaping | |
781 | a `}' within a double-quoted ${...} parameter expansion is removed as part | |
782 | of the parameter expansion. | |
783 | ||
784 | l. Fixed a bug that caused execution of a trap to overwrite PIPESTATUS. | |
785 | ||
786 | m. Fixed a bug that caused here documents to not be displayed correctly | |
787 | when attached to commands inside compound commands. | |
788 | ||
789 | n. Fixed a bug that caused the printf builtin to use the wrong precision | |
790 | when using the `*' modifier. | |
791 | ||
792 | o. Fixed a bug that caused an arriving SIGCHLD to interrupt output functions | |
793 | like those invoked by echo or printf. | |
794 | ||
795 | p. Changed to use a more robust mechanism than eaccess(2) when test is | |
796 | checking filenames for execution permission. | |
797 | ||
798 | q. Fixed a bug that caused spurious semicolons to be added into the command | |
799 | history in certain cases. | |
800 | ||
801 | r. Fixed a bug that caused the shell to free non-allocated memory when | |
802 | unsetting element 0 of an associative array after it was assigned | |
803 | implicitly. | |
804 | ||
805 | s. Fixed a bug that could cause the shell to dump core if using the `v' | |
806 | vi editing command on a multi-line command. | |
807 | ||
808 | t. Fixed a bug that left FIFOs opened by process substitutions open long | |
809 | enough to potentially cause file descriptor exhaustion when running a | |
810 | shell function or shell builtin. | |
811 | ||
812 | u. Fixed a bug that caused the history expansion functions to not recognize | |
813 | process substitution or extended glob patterns as single words. | |
814 | ||
815 | v. Fixed a bug that caused restricted shells to set a restricted command's | |
816 | exit status incorrectly. | |
817 | ||
818 | w. Fixed a bug that caused bash to ignore the wrong set of filenames when | |
819 | completing a command using the `complete-filename' readline command. | |
820 | ||
821 | x. Fixed a bug that caused a -PID argument following a -s sig or -n sig to | |
822 | not be interpreted as a signal specification. | |
823 | ||
824 | y. Changed posix-mode behavior of a parse error in a `.' script or `eval' | |
825 | command to exit the shell under Posix-specified conditions. Previous | |
826 | versions printed a warning. | |
827 | ||
828 | z. Fixed a bug in \W prompt expansion that resulted in incorrect expansion | |
829 | in the event of overlapping strings. | |
830 | ||
831 | aa. Fixed a bug that caused the := parameter expansion operator to return the | |
832 | wrong value as the result of the expansion. | |
833 | ||
834 | bb. When in Posix mode, a single quote is not treated specially in a | |
835 | double-quoted ${...} expansion, unless the expansion operator is | |
836 | # or % or the non-Posix `//', `^', and `,'. In particular, it does | |
837 | not define a new quoting context. This is from Posix interpretation 221. | |
838 | ||
839 | cc. Fixed a bug that inadvertently allowed program names containing slashes | |
840 | to be entered into the command hash table. | |
841 | ||
842 | dd. Fixed a bug that caused the select builtin to incorrectly compute the | |
843 | display width of the arguments in the presence of multibyte characters. | |
844 | ||
845 | ee. Fixed a bug that caused bash to not change the xtrace file descriptor if | |
846 | BASH_XTRACEFD was found in the shell environment at startup. | |
847 | ||
848 | ff. Fixed a memory leak in the pattern removal parameter expansion. | |
849 | ||
850 | gg. Fixed a bug that caused SIGINT to fail to interrupt a nested loop if the | |
851 | loop was in a pipeline. | |
852 | ||
853 | hh. Fixed a problem in $(...) parsing that caused the parser to add an extra | |
854 | space to a here-document delimiter if the first word contained a `/'. | |
855 | ||
856 | ii. Fixed a bug that caused functions defined with the `function' reserved | |
857 | word to require braces around the function body. | |
858 | ||
859 | jj. Fixed a bug that caused bash to dump core when a variable expansion being | |
860 | used as an array subscript failed. | |
861 | ||
862 | kk. Fixed a bug that caused bash to dump core if the case-modification | |
863 | expansions were used on a variable with a null value. | |
864 | ||
865 | ll. Fixed a bug that caused partially-quoted strings to be split incorrectly | |
866 | if a variable with a null value was expanded within double quotes. | |
867 | ||
868 | mm. The pattern substitution word expansion has been sped up dramatically | |
869 | when running in a locale with multibyte characters. | |
870 | ||
871 | nn. Fixed a bug that caused history -a to not write the correct lines to | |
872 | the history file if all the new lines in the history list were added | |
873 | since the last time the history file was read or written. | |
874 | ||
875 | oo. Fixed a bug that caused completion of a word with an unclosed `` command | |
876 | substitution to set the prompt incorrectly. | |
877 | ||
878 | pp. Fixed a bug that caused extended globbing patterns in $HISTIGNORE or | |
879 | $GLOBIGNORE to be incorrectly scanned. | |
880 | ||
881 | qq. Fixed a bug caused by closing file descriptors 3-20 on shell startup. The | |
882 | shell now sets them to close-on-exec. | |
883 | ||
884 | rr. Fixed a bug that caused the exit status of `exec file' to be set incorrectly | |
885 | if `file' was a directory. | |
886 | ||
887 | ss. Fixed a bug in the `.' builtin to make a non-interactive posix-mode shell | |
888 | exit if the file argument to `.' is not found. Prefixing exec with | |
889 | `command' makes the shell not exit. Posix requires this behavior. | |
890 | ||
891 | tt. Fixed a bug that caused `sh -c 'command exec; exit 1' to hang. | |
892 | ||
893 | uu. Fixed a bug in $(...) command substitution parsing that caused the shell | |
894 | to treat backslash-newline incorrectly when parsing a comment. | |
895 | ||
896 | vv. Fixed bug that caused brace expansion sequence generation to misbehave | |
897 | when supplied integers greater than 2**31 - 1. | |
898 | ||
899 | ww. Fixed a bug that caused failure to save file descriptors for redirections | |
900 | to corrupt shell file descriptors. | |
901 | ||
902 | xx. Fixed a bug that caused bash-forward-shellword to not correctly handle | |
903 | quoted strings. | |
904 | ||
905 | 2. Changes to Readline | |
906 | ||
907 | a. Fixed a bug that caused the unconverted filename to be added to the list of | |
908 | completions when the application specified filename conversion functions. | |
909 | ||
910 | b. Fixed a bug that caused the wrong filename to be passed to opendir when the | |
911 | application has specified a filename dequoting function. | |
912 | ||
913 | c. Fixed a bug when repeating a character search in vi mode in the case where | |
914 | there was no search to repeat. | |
915 | ||
916 | d. When show-all-if-ambiguous is set, the completion routines no longer insert | |
917 | a common match prefix that is shorter than the text being completed. | |
918 | ||
919 | e. The full set of vi editing commands may now be used in callback mode. | |
920 | ||
921 | f. Fixed a bug that caused readline to not update its idea of the terminal | |
922 | dimensions while running in `no-echo' mode. | |
923 | ||
924 | h. Fixed a bug that caused readline to dump core if an application called | |
925 | rl_prep_terminal without setting rl_instream. | |
926 | ||
927 | i. Fixed a bug that caused meta-prefixed characters bound to incremental | |
928 | search forward or backward to not be recognized if they were typed | |
929 | subsequently. | |
930 | ||
931 | j. The incremental search code treats key sequences that map to the same | |
932 | functions as (default) ^G, ^W, and ^Y as equivalent to those characters. | |
933 | ||
934 | k. Fixed a bug in menu-complete that caused it to misbehave with large | |
935 | negative argument. | |
936 | ||
937 | l. Fixed a bug that caused vi-mode yank-last-arg to ring the bell when invoked | |
938 | at the end of the line. | |
939 | ||
940 | 3. New Features in Bash | |
941 | ||
942 | a. `exec -a foo' now sets $0 to `foo' in an executable shell script without a | |
943 | leading #!. | |
944 | ||
945 | b. Subshells begun to execute command substitutions or run shell functions or | |
946 | builtins in subshells do not reset trap strings until a new trap is | |
947 | specified. This allows $(trap) to display the caller's traps and the | |
948 | trap strings to persist until a new trap is set. | |
949 | ||
950 | c. `trap -p' will now show signals ignored at shell startup, though their | |
951 | disposition still cannot be modified. | |
952 | ||
953 | d. $'...', echo, and printf understand \uXXXX and \UXXXXXXXX escape sequences. | |
954 | ||
955 | e. declare/typeset has a new `-g' option, which creates variables in the | |
956 | global scope even when run in a shell function. | |
957 | ||
958 | f. test/[/[[ have a new -v variable unary operator, which returns success if | |
959 | `variable' has been set. | |
960 | ||
961 | g. Posix parsing changes to allow `! time command' and multiple consecutive | |
962 | instances of `!' (which toggle) and `time' (which have no cumulative | |
963 | effect). | |
964 | ||
965 | h. Posix change to allow `time' as a command by itself to print the elapsed | |
966 | user, system, and real times for the shell and its children. | |
967 | ||
968 | j. $((...)) is always parsed as an arithmetic expansion first, instead of as | |
969 | a potential nested command substitution, as Posix requires. | |
970 | ||
971 | k. A new FUNCNEST variable to allow the user to control the maximum shell | |
972 | function nesting (recursive execution) level. | |
973 | ||
974 | l. The mapfile builtin now supplies a third argument to the callback command: | |
975 | the line about to be assigned to the supplied array index. | |
976 | ||
18d2df91 | 977 | m. The printf builtin has a new %(fmt)T specifier, which allows time values |
e05be32d CR |
978 | to use strftime-like formatting. |
979 | ||
980 | n. There is a new `compat41' shell option. | |
981 | ||
982 | o. The cd builtin has a new Posix-mandated `-e' option. | |
983 | ||
984 | p. Negative subscripts to indexed arrays, previously errors, now are treated | |
985 | as offsets from the maximum assigned index + 1. | |
986 | ||
987 | q. Negative length specifications in the ${var:offset:length} expansion, | |
988 | previously errors, are now treated as offsets from the end of the variable. | |
989 | ||
990 | r. Parsing change to allow `time -p --'. | |
991 | ||
992 | s. Posix-mode parsing change to not recognize `time' as a keyword if the | |
993 | following token begins with a `-'. This means no more Posix-mode | |
994 | `time -p'. Posix interpretation 267. | |
995 | ||
996 | t. There is a new `lastpipe' shell option that runs the last command of a | |
997 | pipeline in the current shell context. The lastpipe option has no | |
998 | effect if job control is enabled. | |
999 | ||
1000 | u. History expansion no longer expands the `$!' variable expansion. | |
1001 | ||
1002 | v. Posix mode shells no longer exit if a variable assignment error occurs | |
1003 | with an assignment preceding a command that is not a special builtin. | |
1004 | ||
adc6cff5 | 1005 | w. Non-interactive mode shells exit if -u is enabled and an attempt is made |
e05be32d CR |
1006 | to use an unset variable with the % or # expansions, the `//', `^', or |
1007 | `,' expansions, or the parameter length expansion. | |
1008 | ||
1009 | x. Posix-mode shells use the argument passed to `.' as-is if a $PATH search | |
1010 | fails, effectively searching the current directory. Posix-2008 change. | |
1011 | ||
1012 | 4. New Features in Readline | |
1013 | ||
1014 | a. The history library does not try to write the history filename in the | |
1015 | current directory if $HOME is unset. This closes a potential security | |
1016 | problem if the application does not specify a history filename. | |
1017 | ||
1018 | b. New bindable variable `completion-display-width' to set the number of | |
1019 | columns used when displaying completions. | |
1020 | ||
1021 | c. New bindable variable `completion-case-map' to cause case-insensitive | |
1022 | completion to treat `-' and `_' as identical. | |
1023 | ||
1024 | d. There are new bindable vi-mode command names to avoid readline's case- | |
1025 | insensitive matching not allowing them to be bound separately. | |
1026 | ||
1027 | e. New bindable variable `menu-complete-display-prefix' causes the menu | |
1028 | completion code to display the common prefix of the possible completions | |
1029 | before cycling through the list, instead of after. | |
1030 | ||
1031 | ------------------------------------------------------------------------------ | |
ddc8e31a CR |
1032 | This document details the changes between this version, bash-4.1-rc, |
1033 | and the previous version, bash-4.1-beta. | |
1034 | ||
1035 | 1. Changes to Bash | |
1036 | ||
1037 | a. Fixed a bug that caused printf to not return a partial value when it | |
1038 | encountered an error while converting an integer argument. | |
1039 | ||
1040 | b. Fixed a bug that caused setting one of the compatNN options to not | |
1041 | turn off the others. | |
1042 | ||
1043 | c. The (undocumented) --wordexp option is no longer included by default. | |
1044 | ||
1045 | d. Fixed a bug in conditional command execution that caused it to not | |
1046 | correctly ignore the exit status under certain circumstances. | |
1047 | ||
1048 | e. Added a configure-time check for correctly-working asprintf/snprintf. | |
1049 | ||
1050 | f. Fixed some problems with line number calculation and display when sourcing | |
1051 | a file in an interactive shell. | |
1052 | ||
1053 | g. Fixed a bug that caused the shell to crash when using `declare -A foo=bar'. | |
1054 | ||
1055 | h. Fixed a bug that caused an off-by-one error when calculating the directories | |
1056 | to display with the PROMPT_DIRTRIM option. | |
1057 | ||
1058 | 2. Changes to Readline | |
1059 | ||
1060 | a. Fixed a bug that caused applications using the callback interface to not | |
1061 | react to SIGINT (or other signals) until another character arrived. | |
1062 | ||
1063 | ------------------------------------------------------------------------------ | |
2695f55d CR |
1064 | This document details the changes between this version, bash-4.1-beta, |
1065 | and the previous version, bash-4.1-alpha. | |
1066 | ||
1067 | 1. Changes to Bash | |
1068 | ||
1069 | a. Fixed a bug in mapfile that caused the shell to crash if it was passed the | |
1070 | name of an associative array. | |
1071 | ||
1072 | b. Fixed a bug that caused the shell to incorrectly split case patterns if | |
1073 | they contained characters in $IFS. | |
1074 | ||
1075 | c. Fixed a bug that caused the shell to set $? to the wrong value when using | |
1076 | a construct ending with a variable assignment with set -x enabled and PS4 | |
1077 | containing a command substitution. | |
1078 | ||
1079 | d. Fixed a bug that caused the shell to read commands incorrectly if an | |
1080 | expansion error occurred under certain conditions in a user-specified | |
1081 | subshell. | |
1082 | ||
1083 | e. Fixed a bug that caused the shell to set $? incorrectly if a parse error | |
1084 | occurred in an evaluation context ("eval", trap command, dot script, etc.) | |
1085 | ||
1086 | f. Fixed a bug that caused the shell to attempt command substitution | |
1087 | completion within a single-quoted string. | |
1088 | ||
1089 | g. Fixed a bug that caused the shell to insert an extra single quote during | |
1090 | word completion. | |
1091 | ||
1092 | h. Fixed a bug that caused the shell to crash if invoked with the environment | |
1093 | variable EMACS having a null value. | |
1094 | ||
1095 | i. Fixed a bug that caused bash to incorrectly report the presence of new | |
1096 | mail in a `maildir' environment. | |
1097 | ||
1098 | j. Fixed a bug that caused the shell to not recognize a here-document ending | |
1099 | delimiter inside a command substitution. | |
1100 | ||
1101 | k. Fixed a bug that caused the shell to crash when a a dynamic array variable | |
1102 | was assigned a scalar value. | |
1103 | ||
1104 | 2. Changes to Readline | |
1105 | ||
1106 | 3. New Features in Bash | |
1107 | ||
1108 | a. The mapfile/readarray builtin no longer stores the commands it invokes via | |
1109 | callbacks in the history list. | |
1110 | ||
1111 | b. There is a new `compat40' shopt option. | |
1112 | ||
1113 | c. The < and > operators to [[ do string comparisons using the current locale | |
1114 | only if the compatibility level is greater than 40 (set to 41 by default). | |
1115 | ||
1116 | 4. New Features in Readline | |
1117 | ||
1118 | ------------------------------------------------------------------------------ | |
08e72d7a CR |
1119 | This document details the changes between this version, bash-4.1-alpha, |
1120 | and the previous version, bash-4.0-release. | |
1121 | ||
1122 | 1. Changes to Bash | |
1123 | ||
1124 | a. Fixed bugs in the parser involving new parsing of the commands contained | |
1125 | in command substitution when the substitution is read. | |
1126 | ||
1127 | b. Fixed a bug that caused the shell to dump core when performing programmable | |
1128 | completion using a shell function. | |
1129 | ||
1130 | c. Fixed a bug in `mapfile' that caused it to invoke callbacks at the wrong | |
1131 | time. | |
1132 | ||
1133 | d. Fixed a bug that caused the shell to dump core when listing jobs in the | |
1134 | `exit' builtin. | |
1135 | ||
1136 | e. Fixed several bugs encountered when reading subscripts in associative | |
1137 | array assignments and expansions. | |
1138 | ||
1139 | f. Fixed a bug that under some circumstances caused an associative array to | |
1140 | be converted to an indexed array. | |
1141 | ||
1142 | g. Fixed a bug that caused syntax errors and SIGINT interrupts to not set | |
1143 | $? to a value > 128. | |
1144 | ||
1145 | h. Fixed a bug that caused the shell to remove FIFOs associated with process | |
1146 | substitution inside shell functions. | |
1147 | ||
1148 | i. Fixed a bug that caused terminal attributes to not be reset when the | |
1149 | `read' builtin timed out. | |
1150 | ||
1151 | j. Fixed a bug in brace expansion that caused unwanted zero padding of the | |
1152 | expanded terms. | |
1153 | ||
1154 | k. Fixed a bug that prevented the |& construct from working as intended when | |
1155 | used with a simple command with additional redirections. | |
1156 | ||
1157 | l. Fixed a bug with the case statment ;& terminator that caused the shell to | |
1158 | dereference a NULL pointer. | |
1159 | ||
1160 | m. Fixed a bug that caused assignment statements or redirections preceding | |
1161 | a simple command name to inhibit alias expansion. | |
1162 | ||
1163 | n. Fixed the behavior of `set -u' to conform to the latest Posix interpretation: | |
1164 | every expansion of an unset variable except $@ and $* will cause the | |
1165 | shell to exit. | |
1166 | ||
1167 | o. Fixed a bug that caused double-quoted expansions of $* inside word | |
1168 | expansions like ${x#$*} to not expand properly when $IFS is empty. | |
1169 | ||
1170 | p. Fixed a bug that caused traps to set $LINENO to the wrong value when they | |
1171 | execute. | |
1172 | ||
1173 | q. Fixed a bug that caused off-by-one errors when computing history lines in | |
1174 | the `fc' builtin. | |
1175 | ||
1176 | r. Fixed a bug that caused some terminating signals to not exit the shell | |
1177 | quickly enough, forcing the kernel to send the signal (e.g., SIGSEGV) | |
1178 | multiple times. | |
1179 | ||
1180 | s. Fixed a bug that caused the shell to attempt to add empty lines to the | |
1181 | history list when reading here documents. | |
1182 | ||
1183 | t. Made some internal changes that dramatically speeds up sequential indexed | |
1184 | array access. | |
1185 | ||
1186 | u. Fixed a bug that caused the shell to write past the end of a string when | |
1187 | completing a double-quoted string ending in a backslash. | |
1188 | ||
1189 | v. Fixed a bug that caused the shell to replace too many characters when a | |
1190 | pattern match was null in a ${foo//bar} expansion. | |
1191 | ||
1192 | w. Fixed bugs in the expansion of ** that caused duplicate directory names | |
1193 | and the contents of the current directory to be omitted. | |
1194 | ||
1195 | x. Fixed a bug that caused $? to not be set correctly when referencing an | |
1196 | unset variable with set -u and set -e enabled. | |
1197 | ||
1198 | y. Fixed a bug caused by executing an external program from the DEBUG trap | |
1199 | while a pipeline was running. The effect was to disturb the pipeline | |
1200 | state, occasionally causing it to hang. | |
1201 | ||
1202 | z. Fixed a bug that caused the ** glob expansion to dump core if it | |
1203 | encountered an unsearchable directory. | |
1204 | ||
1205 | aa. Fixed a bug that caused `command -v' and `command -V' to not honor the | |
1206 | path set by the -p option. | |
1207 | ||
1208 | bb. Fixed a bug that caused brace expansion to take place too soon in some | |
1209 | compound array assignments. | |
1210 | ||
1211 | cc. Fixed a bug that caused programmable completion functions' changes to | |
1212 | READLINE_POINT to not be reflected back to readline. | |
1213 | ||
1214 | dd. Fixed a bug that caused the shell to dump core if a trap was executed | |
1215 | during a shell assignment statement. | |
1216 | ||
1217 | ee. Fixed an off-by-one error when computing the number of positional | |
1218 | parameters for the ${@:0:n} expansion. | |
1219 | ||
1220 | ff. Fixed a problem with setting COMP_CWORD for programmable completion | |
1221 | functions that could leave it set to -1. | |
1222 | ||
1223 | gg. Fixed a bug that caused the ERR trap to be triggered in some cases where | |
1224 | `set -e' would not have caused the shell to exit. | |
1225 | ||
1226 | hh. Fixed a bug that caused changes made by `compopt' to not persist past the | |
1227 | completion function in which compopt was executed. | |
1228 | ||
1229 | ii. Fixed a bug that caused the list of hostname completions to not be cleared | |
1230 | when HOSTNAME was unset. | |
1231 | ||
1232 | jj. Fixed a bug that caused variable expansion in here documents to look in | |
1233 | any temporary environment. | |
1234 | ||
1235 | kk. Bash and readline can now convert file names between precomposed and | |
1236 | decomposed Unicode on Mac OS X ("keyboard" and file system forms, | |
1237 | respectively). This affects filename completion (using new | |
1238 | rl_filename_rewrite_hook), globbing, and readline redisplay. | |
1239 | ||
1240 | ll. The ERR and EXIT traps now see a non-zero value for $? when a parser | |
1241 | error after set -e has been enabled causes the shell to exit. | |
1242 | ||
1243 | mm. Fixed a bug that in brace expansion that caused zero-prefixed terms to | |
1244 | not contain the correct number of digits. | |
1245 | ||
1246 | nn. Fixed a bug that caused the shell to free non-allocated memory when | |
1247 | unsetting an associative array which had had a value implicitly assigned | |
1248 | to index "0". | |
1249 | ||
1250 | oo. Fixed a memory leak in the ${!prefix@} expansion. | |
1251 | ||
1252 | pp. Fixed a bug that caused printf to not correctly report all write errors. | |
1253 | ||
1254 | qq. Fixed a bug that caused single and double quotes to act as delimiters | |
1255 | when splitting a command line into words for programmable completion. | |
1256 | ||
1257 | rr. Fixed a bug that caused ** globbing that caused **/path/* to match every | |
1258 | directory, not just those matching `path'. | |
1259 | ||
1260 | ss. Fixed a bug that caused the shell to dump core when running `help' without | |
1261 | arguments if the terminal width was fewer than 7 characters. | |
1262 | ||
1263 | 2. Changes to Readline | |
1264 | ||
1265 | a. The SIGWINCH signal handler now avoids calling the redisplay code if | |
1266 | one arrives while in the middle of redisplay. | |
1267 | ||
1268 | b. Changes to the timeout code to make sure that timeout values greater | |
1269 | than one second are handled better. | |
1270 | ||
1271 | c. Fixed a bug in the redisplay code that was triggered by a prompt | |
1272 | containing invisible characters exactly the width of the screen. | |
1273 | ||
1274 | d. Fixed a bug in the redisplay code encountered when running in horizontal | |
1275 | scroll mode. | |
1276 | ||
1277 | e. Fixed a bug that prevented menu completion from properly completing | |
1278 | filenames. | |
1279 | ||
1280 | f. Fixed a redisplay bug caused by a multibyte character causing a line to | |
1281 | wrap. | |
1282 | ||
1283 | g. Fixed a bug that caused key sequences of two characters to not be | |
1284 | recognized when a longer sequence identical in the first two characters | |
1285 | was bound. | |
1286 | ||
1287 | h. Fixed a bug that caused history expansion to be attempted on $'...' | |
1288 | single-quoted strings. | |
1289 | ||
1290 | i. Fixed a bug that caused incorrect redisplay when the prompt contained | |
1291 | multibyte characters in an `invisible' sequence bracketed by \[ and | |
1292 | \]. | |
1293 | ||
1294 | j. Fixed a bug that caused history expansion to short-circuit after | |
1295 | encountering a multibyte character. | |
1296 | ||
1297 | 3. New Features in Bash | |
1298 | ||
1299 | a. Here-documents within $(...) command substitutions may once more be | |
1300 | delimited by the closing right paren, instead of requiring a newline. | |
1301 | ||
1302 | b. Bash's file status checks (executable, readable, etc.) now take file | |
1303 | system ACLs into account on file systems that support them. | |
1304 | ||
1305 | c. Bash now passes environment variables with names that are not valid | |
1306 | shell variable names through into the environment passed to child | |
1307 | processes. | |
1308 | ||
1309 | d. The `execute-unix-command' readline function now attempts to clear and | |
1310 | reuse the current line rather than move to a new one after the command | |
1311 | executes. | |
1312 | ||
1313 | e. `printf -v' can now assign values to array indices. | |
1314 | ||
1315 | f. New `complete -E' and `compopt -E' options that work on the "empty" | |
1316 | completion: completion attempted on an empty command line. | |
1317 | ||
1318 | g. New complete/compgen/compopt -D option to define a `default' completion: | |
1319 | a completion to be invoked on command for which no completion has been | |
1320 | defined. If this function returns 124, programmable completion is | |
1321 | attempted again, allowing a user to dynamically build a set of completions | |
1322 | as completion is attempted by having the default completion function | |
1323 | install individual completion functions each time it is invoked. | |
1324 | ||
1325 | h. When displaying associative arrays, subscripts are now quoted. | |
1326 | ||
1327 | i. Changes to dabbrev-expand to make it more `emacs-like': no space appended | |
1328 | after matches, completions are not sorted, and most recent history entries | |
1329 | are presented first. | |
1330 | ||
1331 | j. The [[ and (( commands are now subject to the setting of `set -e' and the | |
1332 | ERR trap. | |
1333 | ||
1334 | k. The source/. builtin now removes NUL bytes from the file before attempting | |
1335 | to parse commands. | |
1336 | ||
1337 | l. There is a new configuration option (in config-top.h) that forces bash to | |
1338 | forward all history entries to syslog. | |
1339 | ||
1340 | m. A new variable $BASHOPTS to export shell options settable using `shopt' to | |
1341 | child processes. | |
1342 | ||
1343 | n. There is a new confgure option that forces the extglob option to be | |
1344 | enabled by default. | |
1345 | ||
1346 | o. New variable $BASH_XTRACEFD; when set to an integer bash will write xtrace | |
1347 | output to that file descriptor. | |
1348 | ||
1349 | p. If the optional left-hand-side of a redirection is of the form {var}, the | |
1350 | shell assigns the file descriptor used to $var or uses $var as the file | |
1351 | descriptor to move or close, depending on the redirection operator. | |
1352 | ||
1353 | q. The < and > operators to the [[ conditional command now do string | |
1354 | comparison according to the current locale. | |
1355 | ||
1356 | r. Programmable completion now uses the completion for `b' instead of `a' | |
1357 | when completion is attempted on a line like: a $(b c. | |
1358 | ||
1359 | s. Force extglob on temporarily when parsing the pattern argument to | |
1360 | the == and != operators to the [[ command, for compatibility. | |
1361 | ||
1362 | t. Changed the behavior of interrupting the wait builtin when a SIGCHLD is | |
1363 | received and a trap on SIGCHLD is set to be Posix-mode only. | |
1364 | ||
1365 | u. The read builtin has a new `-N nchars' option, which reads exactly NCHARS | |
1366 | characters, ignoring delimiters like newline. | |
1367 | ||
1368 | 4. New Features in Readline | |
1369 | ||
1370 | a. New bindable function: menu-complete-backward. | |
1371 | ||
1372 | b. In the vi insertion keymap, C-n is now bound to menu-complete by default, | |
1373 | and C-p to menu-complete-backward. | |
1374 | ||
1375 | c. When in vi command mode, repeatedly hitting ESC now does nothing, even | |
1376 | when ESC introduces a bound key sequence. This is closer to how | |
1377 | historical vi behaves. | |
1378 | ||
1379 | d. New bindable function: skip-csi-sequence. Can be used as a default to | |
1380 | consume key sequences generated by keys like Home and End without having | |
1381 | to bind all keys. | |
1382 | ||
1383 | e. New application-settable function: rl_filename_rewrite_hook. Can be used | |
1384 | to rewite or modify filenames read from the file system before they are | |
1385 | compared to the word to be completed. | |
1386 | ||
1387 | f. New bindable variable: skip-completed-text, active when completing in the | |
1388 | middle of a word. If enabled, it means that characters in the completion | |
1389 | that match characters in the remainder of the word are "skipped" rather | |
1390 | than inserted into the line. | |
1391 | ||
1392 | g. The pre-readline-6.0 version of menu completion is available as | |
1393 | "old-menu-complete" for users who do not like the readline-6.0 version. | |
1394 | ||
1395 | h. New bindable variable: echo-control-characters. If enabled, and the | |
1396 | tty ECHOCTL bit is set, controls the echoing of characters corresponding | |
1397 | to keyboard-generated signals. | |
1398 | ||
1399 | i. New bindable variable: enable-meta-key. Controls whether or not readline | |
1400 | sends the smm/rmm sequences if the terminal indicates it has a meta key | |
1401 | that enables eight-bit characters. | |
1402 | ||
1403 | ------------------------------------------------------------------------------ | |
a05a1337 CR |
1404 | This document details the changes between this version, bash-4.0-release, |
1405 | and the previous version, bash-4.0-rc1. | |
1406 | ||
1fa6db60 CR |
1407 | 1. Changes to Bash |
1408 | ||
a05a1337 CR |
1409 | a. Changed the message printed when setlocale(3) fails to only include the |
1410 | strerror error text if the call changes errno. | |
1411 | ||
1412 | b. Changed trap command execution to reset the line number before running a | |
1413 | trap (except DEBUG and RETURN traps). | |
1414 | ||
1415 | c. Fixed behavior of case-modifiying word expansions to not work on | |
1416 | individual words within a variable's value. | |
1417 | ||
1418 | d. Fixed a bug that caused mapfile to not be interruptible when run in an | |
1419 | interactive shell. | |
1420 | ||
1421 | e. Fixed a bug that caused mapfile to not run callbacks for the first line | |
1422 | read. | |
1423 | ||
1424 | f. Fixed a bug that caused mapfile to not honor EOF typed in an interactive | |
1425 | shell. | |
1426 | ||
1427 | g. Fixed the coprocess reaping code to not run straight from a signal handler. | |
1428 | ||
1429 | h. Fixed a bug that caused printf -b to ignore the first % conversion specifier | |
1430 | in the format string on 64-bit systems. | |
1431 | ||
1432 | i. Fixed a bug that caused incorrect word splitting when `:', `=', or `~' | |
1433 | appeared in $IFS. | |
1434 | ||
1435 | j. Fixed a bug that caused data corruption in the programmable completion code | |
1436 | when a shell function called from a completion aborted execution. | |
1437 | ||
1438 | k. Fixed a bug that caused the CPU usage reported by the `time' builtin to be | |
1439 | capped at 100%. | |
1440 | ||
1441 | l. Changed behavior of shell when -e option is in effect to reflect consensus | |
1442 | of Posix shell standardization working group. | |
1443 | ||
4b9cc222 CR |
1444 | m. Fixed a bug introduced in bash-4.0-alpha that caused redirections to not |
1445 | be displayed by `type' or `declare' when appearing in functions under | |
1446 | certain circumstances. | |
1447 | ||
a05a1337 CR |
1448 | 2. Changes to Readline |
1449 | ||
1450 | a. Fixed a bug that caused !(...) extended glob patterns to inhibit later | |
1451 | history expansion. | |
1452 | ||
1453 | b. Reworked the signal handling to avoid calling disallowed functions from a | |
1454 | signal handler. | |
1455 | ||
1456 | 3. New Features in Bash | |
1457 | ||
1458 | a. `readarray' is now a synonym for `mapfile'. | |
1459 | ------------------------------------------------------------------------------ | |
4b9cc222 CR |
1460 | This document details the changes between this version, bash-4.0-rc1, |
1461 | and the previous version, bash-4.0-beta2. | |
1462 | ||
a05a1337 CR |
1463 | 1. Changes to Bash |
1464 | ||
dc9f44b3 CR |
1465 | a. Fixed a bug that caused parsing errors when a $()-style command |
1466 | substitution was follwed immediately by a quoted newline. | |
1467 | ||
1468 | b. Fixed a bug that caused extended shell globbing patterns beginning with | |
1469 | `*(' to not work when used with pattern substitution word expansions. | |
1470 | ||
1471 | ------------------------------------------------------------------------------ | |
1472 | This document details the changes between this version, bash-4.0-beta2, | |
4f562c6d | 1473 | and the previous version, bash-4.0-beta. |
dc9f44b3 CR |
1474 | |
1475 | 1. Changes to Bash | |
1476 | ||
626d0694 CR |
1477 | a. Fixed a bug that caused failed word expansions to set $? but not |
1478 | PIPESTATUS. | |
1479 | ||
1480 | b. Changed filename completion to quote the tilde in a filename with a | |
1481 | leading tilde that exists in the current directory. | |
1482 | ||
1483 | c. Fixed a bug that caused a file descriptor leak when performing | |
1484 | redirections attached to a compound command. | |
1485 | ||
1486 | d. Fixed a bug that caused expansions of $@ and $* to not exit the shell if | |
1487 | the -u option was enabled and there were no posititional parameters. | |
1488 | ||
1489 | e. Fixed a bug that resulted in bash not terminating immediately if a | |
1490 | terminating signal was received while performing output. | |
1491 | ||
1492 | f. Fixed a bug that caused the shell to crash after creating 256 process | |
1493 | substitutions during word completion. | |
1494 | ||
1495 | 2. Changes to Readline | |
1496 | ||
1497 | a. Fixed a bug that caused redisplay errors when using prompts with invisible | |
1498 | characters and numeric arguments to a command in a multibyte locale. | |
1499 | ||
1500 | b. Fixed a bug that caused redisplay errors when using prompts with invisible | |
1501 | characters spanning more than two physical screen lines. | |
1502 | ||
1503 | ------------------------------------------------------------------------------ | |
1504 | This document details the changes between this version, bash-4.0-beta, | |
e141c35a | 1505 | and the previous version, bash-4.0-alpha. |
626d0694 CR |
1506 | |
1507 | 1. Changes to Bash | |
1508 | ||
1fa6db60 CR |
1509 | a. Fixed a typo that caused a variable to be used before initialization |
1510 | while parsing Posix-style command substitutions. | |
1511 | ||
1512 | b. Fixed a bug that caused stray ^? when the expansion of a parameter used | |
1513 | as part of a pattern removal expansion is empty, but part of a non- | |
1514 | empty string. | |
1515 | ||
1516 | c. Fixed a bug that could cause strings not converted to numbers by strtol | |
1517 | to be treated as if the conversion had been successful. | |
1518 | ||
1519 | d. The `return' builtin now accepts no options and requires a `--' before | |
1520 | a negative return value, as Posix requires. | |
1521 | ||
1522 | e. Fixed a bug that caused local variables to be created with the empty | |
1523 | string for a value rather than no value. | |
1524 | ||
1525 | f. Changed behavior so the shell now acts as if it received an interrupt | |
1526 | when a pipeline is killed by SIGINT while executing a list. | |
1527 | ||
1528 | g. Fixed a bug that caused `declare var' and `typeset var' to initialize | |
1529 | `var' to the empty string. | |
1530 | ||
1531 | h. Changed `bind' builtin to print a warning but proceed if invoked when | |
1532 | line editing is not active. | |
1533 | ||
1534 | i. Fixed a bug that caused the shell to exit when the `errexit' option is | |
1535 | set and a command in a pipeline returns a non-zero exit status. | |
1536 | ||
1537 | j. Fixed a bug that caused the shell to not run the exit trap in a command | |
1538 | run with `bash -c' under some circumstances. | |
1539 | ||
1540 | k. Fixed a bug that caused parser errors to occasionally not set $? when | |
1541 | running commands with `eval'. | |
1542 | ||
1543 | l. Fixed a bug that caused stray control characters when evaluating compound | |
1544 | array assignments containing $'\x7f' escapes. | |
1545 | ||
1546 | m. Fixed a bug that caused redirections involving file descriptor 10 as the | |
1547 | target to behave incorrectly. | |
1548 | ||
1549 | n. Fixed a bug that could cause memory to be freed multiple times when | |
1550 | assigning to COMP_WORDBREAKS. | |
1551 | ||
9614c166 CR |
1552 | o. Fixed a bug that could cause NULL pointer dereferences when COMP_WORDBREAKS |
1553 | was unset. | |
1554 | ||
1fa6db60 CR |
1555 | 2. Changes to Readline |
1556 | ||
1557 | 3. New Features in Bash | |
1558 | ||
1559 | a. A value of 0 for the -t option to `read' now returns success if there is | |
1560 | input available to be read from the specified file descriptor. | |
1561 | ||
1562 | b. CDPATH and GLOBIGNORE are ignored when the shell is running in privileged | |
1563 | mode. | |
1564 | ||
1565 | c. New bindable readline functions shell-forward-word and shell-backward-word, | |
1566 | which move forward and backward words delimited by shell metacharacters | |
1567 | and honor shell quoting. | |
1568 | ||
1569 | d. New bindable readline functions shell-backward-kill-word and shell-kill-word | |
1570 | which kill words backward and forward, but use the same word boundaries | |
1571 | as shell-forward-word and shell-backward-word. | |
1572 | ||
1573 | 4. New Features in Readline | |
1574 | ||
1575 | a. If the kernel supports it, readline displays special characters | |
1576 | corresponding to a keyboard-generated signal when the signal is received. | |
1577 | ||
1578 | ------------------------------------------------------------------------------ | |
8e1a6eaa CR |
1579 | This document details the changes between this version, bash-4.0-alpha, |
1580 | and the previous version, bash-3.2-release. | |
1581 | ||
1582 | 1. Changes to Bash | |
1583 | ||
1584 | a. Fixed several bugs in old-style `` command substitution parsing, including | |
1585 | comment parsing and quoted string handling. | |
1586 | ||
1587 | b. Fixed problems parsing arguments to the [[ command's =~ regular expression | |
1588 | matching operator: metacharacter and whitespace parsing. | |
1589 | ||
1590 | c. Fixed a bug that caused the shell to inappropriately reuse high-numbered | |
1591 | file descriptors it used internally. | |
1592 | ||
1593 | d. Fixed a bug in pattern replacement word expansions that caused a `/' as | |
1594 | the first character of an expanded pattern to be mistaken for a global | |
1595 | replacement specifier. | |
1596 | ||
1597 | e. Fixed several problems with the asprintf and snprintf replacement functions | |
1598 | that caused hangs and crashes. | |
1599 | ||
1600 | f. Fixed a bug in the calculation of the current and previous job that caused | |
1601 | it to refer to incorrect jobs. | |
1602 | ||
1603 | g. Fixed a bug in the check for the validity of a hashed command pathname that | |
1604 | caused unnecessary hash table deletions and additions. | |
1605 | ||
1606 | h. Fixed a bug that caused child processes to inherit the wrong value for $!. | |
1607 | ||
1608 | i. Fixed a bug that caused `.' to fail to read and execute commands from non- | |
1609 | regular files such as devices or named pipes. | |
1610 | ||
1611 | j. Fixed a bug in printf formatting for the %x and %X expansions that occurred | |
1612 | on some systems. | |
1613 | ||
1614 | k. Fixed a bug that caused the shell to crash when creating temporary files if | |
1615 | $TMPDIR named a non-writable directory. | |
1616 | ||
1617 | l. Fixed a bug that caused the shell to ignore $TMPDIR when creating temporary | |
1618 | files under some circumstances. | |
1619 | ||
1620 | m. Fixed a bug that caused named pipes created by process substitution to not | |
1621 | be cleaned up. | |
1622 | ||
1623 | n. Fixed a bug that caused HISTTIMEFORMAT to not be honored when it appeared | |
1624 | in the initial shell environment. | |
1625 | ||
1626 | o. Fixed several bugs in the expansion of $* and $@ (quoted and unquoted) | |
1627 | when IFS is null or contains non-whitespace characters; the same changes | |
1628 | apply to arrays subscripted with * or @. | |
1629 | ||
1630 | p. Fixed several problems with pattern substitution expansions on the | |
bea29b7b CR |
1631 | positional parameters and arrays subscripted with * or @ that occurred |
1632 | when $IFS was set to the empty string. | |
8e1a6eaa CR |
1633 | |
1634 | q. Made a change to the default locale initialization code that should | |
1635 | result in better behavior from the locale-aware library functions. | |
1636 | ||
1637 | r. Fixed a bug that caused compacting the jobs list to drop jobs. | |
1638 | ||
1639 | s. Fixed a bug that caused jumps back to the top-level processing loop from | |
1640 | a builtin command to leave the shell in an inconsistent state. | |
1641 | ||
1642 | t. Fixed a bug that caused characters that would be escaped internally to be | |
1643 | doubled when escaped with a backslash. | |
1644 | ||
1645 | u. Fixed the initialization of mailboxes to not cause maildirs to be read | |
1646 | (and stat(2) called for every message file) at shell startup. | |
1647 | ||
1648 | v. Fixed a bug that caused the shell to not display $PS2 when the read builtin | |
1649 | reads a line continued with a backslash. | |
1650 | ||
1651 | w. Fixed a bug that caused errors in word splitting when $IFS contained | |
1652 | characters used for internal quoting. | |
1653 | ||
1654 | x. Fixed bugs that caused problems with output from shell builtins not being | |
1655 | completely displayed on some systems. | |
1656 | ||
1657 | y. Fixed a bug that caused output to be lost when a redirection is acting on | |
1658 | the shell's output file descriptor. | |
1659 | ||
1660 | z. Fixed bugs caused by shell builtins not checking for all write errors. | |
1661 | ||
1662 | aa. Fixed a problem that caused the shell to dump core if expansions on the | |
1663 | pattern passed to the pattern removal word expansions resulted in expansion | |
1664 | errors. | |
1665 | ||
1666 | bb. Fixed a bug that caused bash to loop infinitely after creating and | |
1667 | waiting for 4096 jobs. | |
1668 | ||
1669 | cc. Fixed a bug that caused bash to lose the status of a background job under | |
1670 | certain circumstances. | |
1671 | ||
1672 | dd. Fixed a bug that caused bash to not look in the temporary environment | |
1673 | when performing variable lookup under certain circumstances. | |
1674 | ||
1675 | ee. Fixed a bug that caused bash to close file descriptors greater than 10 | |
1676 | when they were used in redirections. | |
1677 | ||
1678 | ff. Fixed a problem that caused the shell to attempt to read from the standard | |
1679 | input when called as `bash -i script'. | |
1680 | ||
1681 | gg. Fixed a memory leak and variable initialization problems when the -v option | |
1682 | was supplied to `printf' that could cause incorrect results. | |
1683 | ||
1684 | hh. Fixed a bug that caused the `read' builtin to count bytes when the -n option | |
1685 | was supplied, rather than (possibly multibyte) characters. | |
1686 | ||
1687 | ii. Fixed a bug when displaying a function due to not converting the function | |
1688 | to an external form. | |
1689 | ||
1690 | jj. Changed job control initialization to ensure that the shell has a tty | |
1691 | as its controlling terminal before enabling job control. | |
1692 | ||
1693 | kk. Fixed a bug with the `test' builtin that caused it to misinterpret | |
1694 | arguments beginning with `-' but containing more than one character. | |
1695 | ||
1696 | ll. Fixed bug that could cause the shell to dump core in certain cases where | |
1697 | a command sets the SIGINT disposition to the default. | |
1698 | ||
bea29b7b CR |
1699 | mm. Fixed a bug in the pattern replacement (affecting both word expansion |
1700 | and the `fc' builtin) that occurred when the pattern and replacement | |
1701 | strings were empty. | |
8e1a6eaa CR |
1702 | |
1703 | nn. Fixed a bug that caused an arithmetic evaluation error to disable all | |
1704 | further evaluation. | |
1705 | ||
1706 | oo. Fixed a bug in pathname expansion that caused it to interpret backslashes | |
1707 | in the pathname as quoting characters. | |
1708 | ||
1709 | pp. Fixed a bug in the replacement getcwd() implementation that could cause | |
1710 | memory to be overwritten. | |
1711 | ||
1712 | qq. When in Posix mode, the `ulimit' builtin now uses a block size of 512 for | |
1713 | the `-c' and `-f' options. | |
1714 | ||
1715 | rr. Brace expansion now allows process substitutions to pass through unchanged. | |
1716 | ||
1717 | ss. Fixed a problem in the command name completion code to avoid quoting | |
1718 | escaped special characters twice when the command name begins with a tilde. | |
1719 | ||
1720 | tt. Fixed a problem in the printf builtin that resulted in single-byte | |
1721 | output for the "'" escape, even when using multibyte characters. | |
1722 | ||
1723 | uu. Fixed a bug that caused the failure exit status to be lost when redirections | |
1724 | attached to a compound command failed. | |
1725 | ||
1726 | vv. Fixed a bug that caused the internal random number generator to not be | |
1727 | re-seeded correctly when creating a subshell. | |
1728 | ||
1729 | ww. Fixed a bug that could cause the bash replacement getcwd to overwrite | |
1730 | memory. | |
1731 | ||
1732 | xx. Fixed a bug that caused the shell to not receive SIGINT if it was sent | |
1733 | while the shell was waiting for a command substitution to terminate, and | |
1734 | make sure the exit status is correct when it does. | |
1735 | ||
1736 | yy. Fixed a bug that resulted in the second and subsequent children spawned | |
1737 | by a shell begun to run a command substitution being placed into the | |
1738 | wrong process group. | |
1739 | ||
1740 | zz. Fixed a bug that caused the results of successful tilde expansion to be | |
1741 | subject to pathname expansion and word splitting. | |
1742 | ||
1743 | aaa. Fixed a bug that could cause the shell to hang if it encountered an | |
1744 | error that caused it to jump back to the top processing loop during a | |
1745 | command substitution or `eval' command. | |
1746 | ||
1747 | bbb. Fixed a bug that caused the `read' builtin to use the tty's attributes | |
1748 | instead of those of the file descriptor passed with the -u option when | |
1749 | processing the -n and -d options. | |
1750 | ||
1751 | ccc. Fixed a bug that caused incorrect expansion of ${array[@]:foo} if the | |
1752 | first character of $IFS was not whitespace. | |
1753 | ||
1754 | ddd. Fixed a bug that occurred when scanning for the ending delimiter of a | |
1755 | ${parameter/pat/sub} expansion. | |
1756 | ||
1757 | eee. Fixed a bug that caused the shell to inappropriately expand command | |
1758 | substitutions in words when expanding directory names for completion. | |
1759 | ||
1760 | fff. Fixed a bug that caused the `fc' builtin to look too far back in the | |
1761 | history list under certain circumstances. | |
1762 | ||
1763 | ggg. Fixed a bug that caused a shell running in Posix mode to search $PWD for | |
1764 | a file specified as an argument to source/. when the file was not found | |
1765 | in $PATH. | |
1766 | ||
1767 | hhh. Fixed a bug that caused the shell to modify the case of a command word | |
1768 | found via command completion when the shell was performing case- | |
1769 | insensitive completion. | |
1770 | ||
1771 | iii. Fixed a bug that caused the shell to search $PATH for an argument to | |
1772 | source/. even when it contained a `/'. | |
1773 | ||
1774 | jjj. Fixed a bug that caused brace expansion to misorder expansions when the | |
1775 | locale did not have a collating order like aAbBcC...zZ. | |
1776 | ||
1777 | kkk. Fixed a bug that did not allow `set +o history' to have any effect when | |
1778 | run in a startup file or from a sourced file. | |
1779 | ||
1780 | lll. Fixed a bug with the precedence of the ?: conditional arithmetic operator. | |
1781 | ||
1782 | mmm. Fixed a bug that caused side effects of temporary variable assignments | |
1783 | to persist in the shell environment. | |
1784 | ||
1785 | nnn. Fixed a bug that caused the terminal to be left in non-canonical mode | |
1786 | when using editing commands that invoke the an editor on the current | |
1787 | command line. | |
1788 | ||
1789 | ooo. Fixed a bug that caused globbing characters and characters in $IFS to not | |
1790 | be quoted appropriately when displaying assignment statements. | |
1791 | ||
1792 | ppp. Fixed a bug that caused the `-e' option to be inherited when sourcing a | |
1793 | file or evaluating a command with `eval' even if the return value of the | |
1794 | command was supposed to be ignored. | |
1795 | ||
1796 | qqq. Fixed a bug that caused the shell to attempt to created variables with | |
1797 | invalid names if such names appeared in the initial environment. | |
1798 | ||
1799 | rrr. Fixed a bug with quote removal in strings where the final character is a | |
1800 | backslash. | |
1801 | ||
1802 | sss. Fixed a bug that caused the effects of special variables to persist even | |
1803 | when the variables were unset as part of the shell reinitializing itself | |
1804 | to execute a shell script. | |
1805 | ||
1806 | ttt. Fixed a bug that caused the history to not be saved after `history -c' or | |
1807 | `history -d' was executed until a sufficient number of commands had been | |
1808 | saved to the history. | |
1809 | ||
1810 | uuu. Bash now parses command substitutions according to Posix rules: parsing | |
1811 | the command contained in $() to find the closing delimiter. | |
1812 | ||
1813 | vvv. Fixed a bug that caused traps on SIGCHLD set in a SIGCHLD handler to | |
1814 | not persist. | |
1815 | ||
1816 | www. Fixed a bug that didn't allow SIGCHLD to interrupt the `wait' builtin | |
1817 | as Posix specifies. | |
1818 | ||
1819 | xxx. Invalid numeric arguments to shell builtins no longer cause the shell to | |
1820 | short-circuit any executing compound command. | |
1821 | ||
1822 | yyy. Fixed a bug that caused the exit status to be lost when `break' was | |
1823 | used to short-circuit a loop's execution. | |
1824 | ||
1825 | zzz. Fixed a bug that caused stray ^? characters to be left in expansions of | |
1826 | "${array[*]}". | |
1827 | ||
1828 | aaaa. Bash now prints better error messages for here documents terminated by | |
1829 | EOF and for identifying the incorrect token in an invalid arithmetic | |
1830 | expression. | |
1831 | ||
1832 | bbbb. Fixed a bug in the variable length word expansion that caused it to | |
1833 | incorrectly calculate the number of multibyte characters. | |
1834 | ||
1835 | cccc. Fixed a race condition that could result in the top-level shell setting | |
1836 | the terminal's process group to an incorrect value if the process | |
1837 | group was changed by a child of a child of the shell. | |
1838 | ||
1839 | dddd. Fixed a bug that caused here documents belonging to commands within a | |
1840 | compound command to be displayed in a syntactially-incorrect form, which | |
1841 | prevented them from being re-read as input. | |
1842 | ||
1843 | eeee. The shell displays more warnings about failures to set the locale. | |
1844 | ||
1845 | ffff. Fixed a bug that caused the body of a here-document to not be saved to | |
1846 | the history list. | |
1847 | ||
bea29b7b CR |
1848 | gggg. Fixed a bug that caused configure to incorrectly conclude that FreeBSD |
1849 | had /dev/fd available, resulting in problems with process substitution. | |
1850 | ||
8e1a6eaa CR |
1851 | 2. Changes to Readline |
1852 | ||
1853 | a. Fixed a number of redisplay errors in environments supporting multibyte | |
1854 | characters. | |
1855 | ||
1856 | b. Fixed bugs in vi command mode that caused motion commands to inappropriately | |
1857 | set the mark. | |
1858 | ||
1859 | c. When using the arrow keys in vi insertion mode, readline allows movement | |
1860 | beyond the current end of the line (unlike command mode). | |
1861 | ||
1862 | d. Fixed bugs that caused readline to loop when the terminal has been taken | |
1863 | away and reads return -1/EIO. | |
1864 | ||
1865 | e. Fixed bugs in redisplay occurring when displaying prompts containing | |
1866 | invisible characters. | |
1867 | ||
1868 | f. Fixed a bug that caused the completion append character to not be reset to | |
1869 | the default after an application-specified completion function changed it. | |
1870 | ||
bea29b7b CR |
1871 | g. Fixed a problem that caused incorrect positioning of the cursor while in |
1872 | emacs editing mode when moving forward at the end of a line while using | |
1873 | a locale supporting multibyte characters. | |
8e1a6eaa CR |
1874 | |
1875 | h. Fixed an off-by-one error that caused readline to drop every 511th | |
1876 | character of buffered input. | |
1877 | ||
1878 | i. Fixed a bug that resulted in SIGTERM not being caught or cleaned up. | |
1879 | ||
1880 | j. Fixed redisplay bugs caused by multiline prompts with invisible characters | |
1881 | or no characters following the final newline. | |
1882 | ||
1883 | k. Fixed redisplay bug caused by prompts consisting solely of invisible | |
1884 | characters. | |
1885 | ||
1886 | l. Fixed a bug in the code that buffers characters received very quickly in | |
1887 | succession which caused characters to be dropped. | |
1888 | ||
1889 | m. Fixed a bug that caused readline to reference uninitialized data structures | |
1890 | if it received a SIGWINCH before completing initialzation. | |
1891 | ||
1892 | n. Fixed a bug that caused the vi-mode `last command' to be set incorrectly | |
1893 | and therefore unrepeatable. | |
1894 | ||
1895 | o. Fixed a bug that caused readline to disable echoing when it was being used | |
1896 | with an output file descriptor that was not a terminal. | |
1897 | ||
1898 | p. Readline now blocks SIGINT while manipulating internal data structures | |
1899 | during redisplay. | |
1900 | ||
bea29b7b CR |
1901 | q. Fixed a bug in redisplay that caused readline to segfault when pasting a |
1902 | very long line (over 130,000 characters). | |
1903 | ||
1904 | r. Fixed bugs in redisplay when using prompts with no visible printing | |
1905 | characters. | |
1906 | ||
8e1a6eaa CR |
1907 | 3. New Features in Bash |
1908 | ||
1909 | a. When using substring expansion on the positional parameters, a starting | |
1910 | index of 0 now causes $0 to be prefixed to the list. | |
1911 | ||
1912 | b. The `help' builtin now prints its columns with entries sorted vertically | |
1913 | rather than horizontally. | |
1914 | ||
1915 | c. There is a new variable, $BASHPID, which always returns the process id of | |
1916 | the current shell. | |
1917 | ||
1918 | d. There is a new `autocd' option that, when enabled, causes bash to attempt | |
1919 | to `cd' to a directory name that is supplied as the first word of a | |
1920 | simple command. | |
1921 | ||
1922 | e. There is a new `checkjobs' option that causes the shell to check for and | |
1923 | report any running or stopped jobs at exit. | |
1924 | ||
1925 | f. The programmable completion code exports a new COMP_TYPE variable, set to | |
1926 | a character describing the type of completion being attempted. | |
1927 | ||
1928 | g. The programmable completion code exports a new COMP_KEY variable, set to | |
1929 | the character that caused the completion to be invoked (e.g., TAB). | |
1930 | ||
1931 | h. If creation of a child process fails due to insufficient resources, bash | |
1932 | will try again several times before reporting failure. | |
1933 | ||
1934 | i. The programmable completion code now uses the same set of characters as | |
1935 | readline when breaking the command line into a list of words. | |
1936 | ||
1937 | j. The block multiplier for the ulimit -c and -f options is now 512 when in | |
1938 | Posix mode, as Posix specifies. | |
1939 | ||
1940 | k. Changed the behavior of the read builtin to save any partial input received | |
1941 | in the specified variable when the read builtin times out. This also | |
1942 | results in variables specified as arguments to read to be set to the empty | |
1943 | string when there is no input available. When the read builtin times out, | |
1944 | it returns an exit status greater than 128. | |
1945 | ||
1946 | l. The shell now has the notion of a `compatibility level', controlled by | |
1947 | new variables settable by `shopt'. Setting this variable currently | |
1948 | restores the bash-3.1 behavior when processing quoted strings on the rhs | |
1949 | of the `=~' operator to the `[[' command. | |
1950 | ||
1951 | m. The `ulimit' builtin now has new -b (socket buffer size) and -T (number | |
1952 | of threads) options. | |
1953 | ||
1954 | n. The -p option to `declare' now displays all variable values and attributes | |
1955 | (or function values and attributes if used with -f). | |
1956 | ||
1957 | o. There is a new `compopt' builtin that allows completion functions to modify | |
1958 | completion options for existing completions or the completion currently | |
1959 | being executed. | |
1960 | ||
1961 | p. The `read' builtin has a new -i option which inserts text into the reply | |
1962 | buffer when using readline. | |
1963 | ||
1964 | q. A new `-E' option to the complete builtin allows control of the default | |
1965 | behavior for completion on an empty line. | |
1966 | ||
1967 | r. There is now limited support for completing command name words containing | |
1968 | globbing characters. | |
1969 | ||
1970 | s. Changed format of internal help documentation for all builtins to roughly | |
1971 | follow man page format. | |
1972 | ||
1973 | t. The `help' builtin now has a new -d option, to display a short description, | |
1974 | and a -m option, to print help information in a man page-like format. | |
1975 | ||
1976 | u. There is a new `mapfile' builtin to populate an array with lines from a | |
1977 | given file. | |
1978 | ||
1979 | v. If a command is not found, the shell attempts to execute a shell function | |
1980 | named `command_not_found_handle', supplying the command words as the | |
1981 | function arguments. | |
1982 | ||
1983 | w. There is a new shell option: `globstar'. When enabled, the globbing code | |
1984 | treats `**' specially -- it matches all directories (and files within | |
1985 | them, when appropriate) recursively. | |
1986 | ||
1987 | x. There is a new shell option: `dirspell'. When enabled, the filename | |
1988 | completion code performs spelling correction on directory names during | |
1989 | completion. | |
1990 | ||
1991 | y. The `-t' option to the `read' builtin now supports fractional timeout | |
1992 | values. | |
1993 | ||
1994 | z. Brace expansion now allows zero-padding of expanded numeric values and | |
1995 | will add the proper number of zeroes to make sure all values contain the | |
1996 | same number of digits. | |
1997 | ||
1998 | aa. There is a new bash-specific bindable readline function: `dabbrev-expand'. | |
1999 | It uses menu completion on a set of words taken from the history list. | |
2000 | ||
2001 | bb. The command assigned to a key sequence with `bind -x' now sets two new | |
2002 | variables in the environment of the executed command: READLINE_LINE_BUFFER | |
2003 | and READLINE_POINT. The command can change the current readline line | |
2004 | and cursor position by modifying READLINE_LINE_BUFFER and READLINE_POINT, | |
2005 | respectively. | |
2006 | ||
c302751c | 2007 | cc. There is a new &>> redirection operator, which appends the standard output |
8e1a6eaa CR |
2008 | and standard error to the named file. |
2009 | ||
2010 | dd. The parser now understands `|&' as a synonym for `2>&1 |', which redirects | |
2011 | the standard error for a command through a pipe. | |
2012 | ||
2013 | ee. The new `;&' case statement action list terminator causes execution to | |
2014 | continue with the action associated with the next pattern in the | |
2015 | statement rather than terminating the command. | |
2016 | ||
2017 | ff. The new `;;&' case statement action list terminator causes the shell to | |
2018 | test the next set of patterns after completing execution of the current | |
2019 | action, rather than terminating the command. | |
2020 | ||
2021 | gg. The shell understands a new variable: PROMPT_DIRTRIM. When set to an | |
2022 | integer value greater than zero, prompt expansion of \w and \W will | |
2023 | retain only that number of trailing pathname components and replace | |
2024 | the intervening characters with `...'. | |
2025 | ||
2026 | hh. There are new case-modifying word expansions: uppercase (^[^]) and | |
2027 | lowercase (,[,]). They can work on either the first character or | |
2028 | array element, or globally. They accept an optional shell pattern | |
2029 | that determines which characters to modify. There is an optionally- | |
2030 | configured feature to include capitalization operators. | |
2031 | ||
2032 | ii. The shell provides associative array variables, with the appropriate | |
2033 | support to create, delete, assign values to, and expand them. | |
2034 | ||
2035 | jj. The `declare' builtin now has new -l (convert value to lowercase upon | |
2036 | assignment) and -u (convert value to uppercase upon assignment) options. | |
2037 | There is an optionally-configurable -c option to capitalize a value at | |
2038 | assignment. | |
2039 | ||
2040 | kk. There is a new `coproc' reserved word that specifies a coprocess: an | |
2041 | asynchronous command run with two pipes connected to the creating shell. | |
2042 | Coprocs can be named. The input and output file descriptors and the | |
2043 | PID of the coprocess are available to the calling shell in variables | |
2044 | with coproc-specific names. | |
2045 | ||
2046 | 4. New Features in Readline | |
2047 | ||
2048 | a. A new variable, rl_sort_completion_matches; allows applications to inhibit | |
2049 | match list sorting (but beware: some things don't work right if | |
2050 | applications do this). | |
2051 | ||
2052 | b. A new variable, rl_completion_invoking_key; allows applications to discover | |
2053 | the key that invoked rl_complete or rl_menu_complete. | |
2054 | ||
2055 | c. The functions rl_block_sigint and rl_release_sigint are now public and | |
2056 | available to calling applications who want to protect critical sections | |
2057 | (like redisplay). | |
2058 | ||
2059 | d. The functions rl_save_state and rl_restore_state are now public and | |
2060 | available to calling applications; documented rest of readline's state | |
2061 | flag values. | |
2062 | ||
2063 | e. A new user-settable variable, `history-size', allows setting the maximum | |
2064 | number of entries in the history list. | |
2065 | ||
2066 | f. There is a new implementation of menu completion, with several improvements | |
2067 | over the old; the most notable improvement is a better `completions | |
2068 | browsing' mode. | |
2069 | ||
2070 | g. The menu completion code now uses the rl_menu_completion_entry_function | |
2071 | variable, allowing applications to provide their own menu completion | |
2072 | generators. | |
2073 | ||
2074 | h. There is support for replacing a prefix of a pathname with a `...' when | |
2075 | displaying possible completions. This is controllable by setting the | |
2076 | `completion-prefix-display-length' variable. Matches with a common prefix | |
2077 | longer than this value have the common prefix replaced with `...'. | |
2078 | ||
2079 | i. There is a new `revert-all-at-newline' variable. If enabled, readline will | |
2080 | undo all outstanding changes to all history lines when `accept-line' is | |
2081 | executed. | |
2082 | ||
2083 | ------------------------------------------------------------------------------ | |
d3ad40de CR |
2084 | This document details the changes between this version, bash-3.2-release, |
2085 | and the previous version, bash-3.2-beta. | |
2086 | ||
2087 | 1. Changes to Bash | |
2088 | ||
2089 | a. Fixed a bug that caused the temporary environment passed to a command to | |
2090 | affect the shell's environment under certain circumstances. | |
2091 | ||
2092 | b. Fixed a bug in the printf builtin that caused the %q format specifier to | |
2093 | ignore empty string arguments. | |
2094 | ||
2095 | c. Improved multibyte character environment detection at configuration time. | |
2096 | ||
2097 | d. Fixed a bug in the read builtin that left spurious escape characters in the | |
2098 | input after processing backslashes when assigning to an array variable. | |
2099 | ||
2100 | 2. Changes to Readline | |
2101 | ||
2102 | a. Fixed a redisplay bug that occurred in multibyte-capable locales when the | |
2103 | prompt was one character longer than the screen width. | |
2104 | ------------------------------------------------------------------------------ | |
2105 | This document details the changes between this version, bash-3.2-beta, | |
2106 | and the previous version, bash-3.2-alpha. | |
2107 | ||
2108 | 1. Changes to Bash | |
2109 | ||
2110 | a. Changed the lexical analyzer to treat locale-specific blank characters as | |
2111 | white space. | |
2112 | ||
2113 | b. Fixed a bug in command printing to avoid confusion between redirections and | |
2114 | process substitution. | |
2115 | ||
2116 | c. Fixed problems with cross-compiling originating from inherited environment | |
2117 | variables. | |
2118 | ||
2119 | d. Added write error reporting to printf builtin. | |
2120 | ||
2121 | e. Fixed a bug in the variable expansion code that could cause a core dump in | |
2122 | a multi-byte locale. | |
2123 | ||
2124 | f. Fixed a bug that caused substring expansion of a null string to return | |
2125 | incorrect results. | |
2126 | ||
2127 | g. BASH_COMMAND now retains its previous value while executing commands as the | |
2128 | result of a trap, as the documentation states. | |
2129 | ||
2130 | 2. Changes to Readline | |
2131 | ||
2132 | a. Fixed a bug with prompt redisplay in a multi-byte locale to avoid redrawing | |
2133 | the prompt and input line multiple times. | |
2134 | ||
2135 | b. Fixed history expansion to not be confused by here-string redirection. | |
2136 | ||
2137 | c. Readline no longer treats read errors by converting them to newlines, as | |
2138 | it does with EOF. This caused partial lines to be returned from readline(). | |
2139 | ||
2140 | ------------------------------------------------------------------------------ | |
2141 | This document details the changes between this version, bash-3.2-alpha, | |
2142 | and the previous version, bash-3.1-release. | |
2143 | ||
2144 | 1. Changes to Bash | |
2145 | ||
2146 | a. Fixed a source bug that caused the minimal configuration to not compile. | |
2147 | ||
2148 | b. Fixed memory leaks in error handling for the `read' builtin. | |
2149 | ||
2150 | c. Changed the [[ and (( compound commands to set PIPESTATUS with their exit | |
2151 | status. | |
2152 | ||
2153 | d. Fixed some parsing problems with compound array assignments. | |
2154 | ||
2155 | e. Added additional configuration changes for: NetBSD (incomplete multibyte | |
2156 | character support) | |
2157 | ||
2158 | f. Fixed two bugs with local array variable creation when shadowing a variable | |
2159 | of the same name from a previous context. | |
2160 | ||
2161 | g. Fixed the `read' builtin to restore the correct set of completion functions | |
2162 | if a timeout occurs. | |
2163 | ||
2164 | h. Added code to defer the initialization of HISTSIZE (and its stifling of the | |
2165 | history list) until the history file is loaded, allowing a startup file to | |
2166 | override the default value. | |
2167 | ||
2168 | i. Tightened up the arithmetic expression parsing to produce better error | |
2169 | messages when presented with invalid operators. | |
2170 | ||
2171 | j. Fixed the cross-compilation support to build the signal list at shell | |
2172 | invocation rather than compile time if cross-compiling. | |
2173 | ||
2174 | k. Fixed multibyte support for non-gcc compilers (or compilers that do not | |
2175 | allow automatic array variable sizing based on a non-constant value). | |
2176 | ||
2177 | l. Several fixes to the code that manages the list of terminated jobs and | |
2178 | their exit statuses, and the list of active and recently-terminated jobs | |
2179 | to avoid pid aliasing/wraparound and allocation errors. | |
2180 | ||
2181 | m. Fixed a problem that allowed scripts to die due to SIGINT while waiting | |
2182 | for children, even when started in the background or otherwise ignoring | |
2183 | SIGINT. | |
2184 | ||
2185 | n. Fixed a bug that caused shells invoked as -/bin/bash from not being | |
2186 | recognized as login shells. | |
2187 | ||
2188 | o. Fixed a problem that caused shells in the background to give the terminal | |
2189 | to a process group other than the foreground shell process group. | |
2190 | ||
2191 | p. Fixed a problem with extracting the `varname' in ${#varname}. | |
2192 | ||
2193 | q. Fixed the code that handles SIGQUIT to not exit immediately -- thereby | |
2194 | calling functions that may not be called in a signal handler context -- | |
2195 | but set a flag and exit afterward (like SIGINT). | |
2196 | ||
2197 | r. Changed the brace expansion code to skip over braces that don't begin a | |
2198 | valid matched brace expansion construct. | |
2199 | ||
2200 | s. Fixed `typeset' and `declare' to not require that their shell function | |
2201 | operands to be valid shell identifiers. | |
2202 | ||
2203 | t. Changed `test' to use access(2) with a temporary uid/euid swap when testing | |
2204 | file attributes and running setuid, and access(2) in most other cases. | |
2205 | ||
2206 | u. Changed completion code to not attempt command name completion on a line | |
2207 | consisting solely of whitespace when no_empty_command_completion is set. | |
2208 | ||
2209 | v. The `hash' builtin now prints nothing in posix mode when the hash table is | |
2210 | empty, and prints a message to that effect to stdout instead of stderr | |
2211 | when not in posix mode. | |
2212 | ||
2213 | w. Fixed a bug in the extended pattern matching code that caused it to fail to | |
2214 | match periods with certain patterns. | |
2215 | ||
2216 | x. Fixed a bug that caused the shell to dump core when performing filename | |
2217 | generation in directories with thousands of files. | |
2218 | ||
2219 | y. Returned to the original Bourne shell rules for parsing ``: no recursive | |
2220 | parsing of embedded quoted strings or ${...} constructs. | |
2221 | ||
2222 | z. The inheritence of the DEBUG, RETURN, and ERR traps is now dependent only | |
2223 | on the settings of the `functrace' and `errtrace' shell options, rather | |
2224 | than whether or not the shell is in debugging mode. | |
2225 | ||
2226 | aa. Fixed a problem with $HOME being converted to ~ in the expansion of | |
2227 | members of the DIRSTACK array. | |
2228 | ||
2229 | bb. Fixed a problem with quoted arguments to arithmetic expansions in certain | |
2230 | constructs. | |
2231 | ||
2232 | cc. The command word completion code now no longer returns matching directories | |
2233 | while searching $PATH. | |
2234 | ||
2235 | dd. Fixed a bug with zero-padding and precision handling in snprintf() | |
2236 | replacement. | |
2237 | ||
2238 | ee. Fixed a bug that caused the command substitution code not to take embedded | |
2239 | shell comments into account. | |
2240 | ||
2241 | ff. Fixed a bug that caused $((...);(...)) to be misinterpreted as an | |
2242 | arithmetic substitution. | |
2243 | ||
2244 | gg. Fixed a bug in the prompt expansion code that inappropriately added a | |
2245 | \001 before a \002 under certain circumstances. | |
2246 | ||
2247 | hh. Fixed a bug that caused `unset LANG' to not properly reset the locale | |
2248 | (previous versions would set the locale back to what it was when bash | |
2249 | was started rather than the system's "native" locale). | |
2250 | ||
2251 | ii. Fixed a bug that could cause file descriptors > 10 to not be closed even | |
2252 | when closed explicitly by a script. | |
2253 | ||
2254 | jj. Fixed a bug that caused single quotes to be stripped from ANSI-C quoting | |
2255 | inside double-quoted command substitutions. | |
2256 | ||
2257 | kk. Fixed a bug that could cause core dumps when `return' was executed as the | |
2258 | last element of a pipeline inside a shell function. | |
2259 | ||
2260 | ll. Fixed a bug that caused DEBUG trap strings to overwrite commands stored in | |
2261 | the jobs list. | |
2262 | ||
2263 | 2. Changes to Readline | |
2264 | ||
2265 | a. Fixed a problem that caused segmentation faults when using readline in | |
2266 | callback mode and typing consecutive DEL characters on an empty line. | |
2267 | ||
2268 | b. Fixed several redisplay problems with multibyte characters, all having to | |
2269 | do with the different code paths and variable meanings between single-byte | |
2270 | and multibyte character redisplay. | |
2271 | ||
2272 | c. Fixed a problem with key sequence translation when presented with the | |
2273 | sequence \M-\C-x. | |
2274 | ||
2275 | d. Fixed a problem that prevented the `a' command in vi mode from being | |
2276 | undone and redone properly. | |
2277 | ||
2278 | e. Fixed a problem that prevented empty inserts in vi mode from being undone | |
2279 | properly. | |
2280 | ||
2281 | f. Fixed a problem that caused readline to initialize with an incorrect idea | |
2282 | of whether or not the terminal can autowrap. | |
2283 | ||
2284 | g. Fixed output of key bindings (like bash `bind -p') to honor the setting of | |
2285 | convert-meta and use \e where appropriate. | |
2286 | ||
2287 | h. Changed the default filename completion function to call the filename | |
2288 | dequoting function if the directory completion hook isn't set. This means | |
2289 | that any directory completion hooks need to dequote the directory name, | |
2290 | since application-specific hooks need to know how the word was quoted, | |
2291 | even if no other changes are made. | |
2292 | ||
2293 | i. Fixed a bug with creating the prompt for a non-interactive search string | |
2294 | when there are non-printing characters in the primary prompt. | |
2295 | ||
2296 | j. Fixed a bug that caused prompts with invisible characters to be redrawn | |
2297 | multiple times in a multibyte locale. | |
2298 | ||
2299 | k. Fixed a bug that could cause the key sequence scanning code to return the | |
2300 | wrong function. | |
2301 | ||
2302 | l. Fixed a problem with the callback interface that caused it to fail when | |
2303 | using multi-character keyboard macros. | |
2304 | ||
2305 | m. Fixed a bug that could cause a core dump when an edited history entry was | |
2306 | re-executed under certain conditions. | |
2307 | ||
2308 | n. Fixed a bug that caused readline to reference freed memory when attmpting | |
2309 | to display a portion of the prompt. | |
2310 | ||
2311 | 3. New Features in Bash | |
2312 | ||
2313 | a. Changed the parameter pattern replacement functions to not anchor the | |
2314 | pattern at the beginning of the string if doing global replacement - that | |
2315 | combination doesn't make any sense. | |
2316 | ||
2317 | b. When running in `word expansion only' mode (--wordexp option), inhibit | |
2318 | process substitution. | |
2319 | ||
2320 | c. Loadable builtins now work on MacOS X 10.[34]. | |
2321 | ||
2322 | d. Shells running in posix mode no longer set $HOME, as POSIX requires. | |
2323 | ||
2324 | e. The code that checks for binary files being executed as shell scripts now | |
2325 | checks only for NUL rather than any non-printing character. | |
2326 | ||
2327 | f. Quoting the string argument to the [[ command's =~ operator now forces | |
2328 | string matching, as with the other pattern-matching operators. | |
2329 | ||
2330 | 4. New Features in Readline | |
2331 | ||
2332 | a. Calling applications can now set the keyboard timeout to 0, allowing | |
2333 | poll-like behavior. | |
2334 | ||
2335 | b. The value of SYS_INPUTRC (configurable at compilation time) is now used as | |
2336 | the default last-ditch startup file. | |
2337 | ||
2338 | c. The history file reading functions now allow windows-like \r\n line | |
2339 | terminators. | |
2340 | ||
2341 | ------------------------------------------------------------------------------ | |
8f01d942 CR |
2342 | This document details the changes between this version, bash-3.1-release, |
2343 | and the previous version, bash-3.1-rc2. | |
2344 | ||
2345 | 1. Changes to Readline | |
2346 | ||
2347 | a. Several changes to the multibyte redisplay code to fix problems with | |
2348 | prompts containing invisible characters. | |
2349 | ||
2350 | ------------------------------------------------------------------------------ | |
28089d04 CR |
2351 | This document details the changes between this version, bash-3.1-rc2, |
2352 | and the previous version, bash-3.1-rc1. | |
2353 | ||
2354 | 1. Changes to Bash | |
2355 | ||
2356 | a. Fixed a bug that caused a DEBUG trap to overwrite a command string that's | |
2357 | eventually attached to a background job. | |
2358 | ||
2359 | b. Changed some code so that filenames with leading tildes with spaces in the | |
2360 | name aren't tilde-expanded by the bash completion code. | |
2361 | ||
2362 | c. Fixed a bug that caused the pushd builtin to fail to change to | |
2363 | directories with leading `-'. | |
2364 | ||
2365 | d. Fixed a small memory leak in the programmable completion code. | |
2366 | ||
2367 | 2. Changes to Readline | |
2368 | ||
2369 | a. Fixed a redisplay bug caused by moving the cursor vertically to a line | |
2370 | with invisible characters in the prompt in a multibyte locale. | |
2371 | ||
2372 | b. Fixed a bug that could cause the terminal special chars to be bound in the | |
2373 | wrong keymap in vi mode. | |
2374 | ||
2375 | 3. New Features in Bash | |
2376 | ||
2377 | a. If compiled for strict POSIX conformance, LINES and COLUMNS may now | |
2378 | override the true terminal size. | |
2379 | ||
2380 | 4. New Features in Readline | |
2381 | ||
2382 | a. A new external application-controllable variable that allows the LINES | |
2383 | and COLUMNS environment variables to set the window size regardless of | |
2384 | what the kernel returns. | |
2385 | ||
2386 | ------------------------------------------------------------------------------ | |
bc7bed50 CR |
2387 | This document details the changes between this version, bash-3.1-rc1, |
2388 | and the previous version, bash-3.1-beta1. | |
2389 | ||
2390 | 1. Changes to Bash | |
2391 | ||
d3ad40de | 2392 | a. Fixed a bug that could cause core dumps due to accessing the current |
bc7bed50 CR |
2393 | pipeline while in the middle of modifying it. |
2394 | ||
2395 | b. Fixed a bug that caused pathnames with backslashes still quoting characters | |
2396 | to be passed to opendir(). | |
2397 | ||
2398 | c. Command word completion now obeys the setting of completion-ignore-case. | |
2399 | ||
2400 | d. Fixed a problem with redirection that caused file descriptors greater than | |
2401 | 2 to be inappropriately marked as close-on-exec. | |
2402 | ||
2403 | e. In Posix mode, after `wait' is called to wait for a particular process | |
2404 | explicitly, that process is removed from the list of processes known to | |
2405 | the shell, and subsequent attempts to wait for it return errors. | |
2406 | ||
2407 | f. Fixed a bug that caused extended pattern matching to incorrectly scan | |
2408 | backslash-escaped pattern characters. | |
2409 | ||
2410 | g. Fixed a synchronization problem that could cause core dumps when handling | |
2411 | a SIGWINCH. | |
2412 | ||
2413 | h. Fixed a bug that caused an unmatched backquote to be accepted without an | |
2414 | error when processing here documents. | |
2415 | ||
2416 | i. Fixed a small memory leak in the `cd' builtin. | |
2417 | ||
2418 | j. Fix for MacOS X so it gets the values for the HOSTTYPE, MACHTYPE, and | |
2419 | OSTYPE variables at build time, to support universal binaries. | |
2420 | ||
2421 | k. Fixed a bug that could cause an exit trap to return the exit status of | |
2422 | the trap command rather than the status as it was before the trap was | |
2423 | run as the shell's exit status. | |
2424 | ||
2425 | 2. New Features in Bash | |
2426 | ||
2427 | 3. Changes to Readline | |
2428 | ||
2429 | a. Fixed a bug that caused reversing the incremental search direction to | |
2430 | not work correctly. | |
2431 | ||
2432 | b. Fixed the vi-mode `U' command to only undo up to the first time insert mode | |
2433 | was entered, as Posix specifies. | |
2434 | ||
6bf74e5a CR |
2435 | c. Fixed a bug in the vi-mode `r' command that left the cursor in the wrong |
2436 | place. | |
2437 | ||
bc7bed50 CR |
2438 | 4. New Features in Readline |
2439 | ||
2440 | a. New application-callable auxiliary function, rl_variable_value, returns | |
2441 | a string corresponding to a readline variable's value. | |
2442 | ||
2443 | b. When parsing inputrc files and variable binding commands, the parser | |
2444 | strips trailing whitespace from values assigned to boolean variables | |
2445 | before checking them. | |
2446 | ||
2447 | ||
2448 | ------------------------------------------------------------------------------ | |
a2e7f358 CR |
2449 | This document details the changes between this version, bash-3.1-beta1, |
2450 | and the previous version, bash-3.1-alpha1. | |
2451 | ||
2452 | 1. Changes to Bash | |
2453 | ||
2454 | a. Added some system-specific signal names. | |
2455 | ||
2456 | b. Fixed a typo in the ulimit builtin to make `x' the right option to | |
2457 | maniuplate the limit on file locks. | |
2458 | ||
2459 | c. Fixed a problem with using += to append to index 0 of an array variable | |
2460 | when not using subscript syntax. | |
2461 | ||
2462 | d. A few changes to configure.in to remove calls to obsolete or outdated | |
2463 | macros. | |
2464 | ||
2465 | e. Make sure changes to variables bash handles specially (e.g., LC_ALL) are | |
2466 | made when the variable is set in the temporary environment to a command. | |
2467 | ||
2468 | f. Make sure changes to variables bash handles specially (e.g., LC_ALL) are | |
2469 | made when the variable is modified using `printf -v'. | |
2470 | ||
2471 | g. The export environment is now remade on cygwin when HOME is changed, so | |
2472 | DLLs bash is linked against pick up the new value. This fixes problems | |
2473 | with tilde expansion when linking against and already-installed readline. | |
2474 | ||
2475 | h. Small fix to the logic for performing tilde expansion in posix mode, so | |
2476 | expansion on the right-hand side of an assignment statement takes place. | |
2477 | ||
2478 | i. Fixed a bug that prevented redirections associated with a shell function | |
2479 | from being executed when in a subshell. | |
2480 | ||
2481 | j. Fixed `source' and `.' builtins to not require an executable file when | |
2482 | searching $PATH for a file to source. | |
2483 | ||
2484 | k. Fixed a bug that caused incorrect word splitting in a function when IFS | |
2485 | was declared local, then unset. | |
2486 | ||
2487 | l. Fixed a problem with the `kill' builtin that prevented sending signals | |
2488 | to a process group under certain circumstances when providing a pid < 0. | |
2489 | ||
2490 | m. When in POSIX mode, `pwd' now checks that the value it prints is the same | |
2491 | directory as `.', even when displaying $PWD. | |
2492 | ||
2493 | n. Fixed a problem with the `read' builtin when reading a script from standard | |
2494 | input and reading data from the same file. | |
2495 | ||
2496 | o. Fixed a problem with the `type' and `command' builtins that caused absolute | |
2497 | pathnames to be displayed incorrectly. | |
2498 | ||
2499 | p. Some changes to the `bg' builtin for POSIX conformance. | |
2500 | ||
2501 | q. The `fc' builtin now removes the `fc' command that caused it to invoke an | |
2502 | editor on specified history entries from the history entirely, rather than | |
2503 | simply ignoring it. | |
2504 | ||
2505 | r. When in POSIX mode, the `v' command in vi editing mode simply invokes vi | |
2506 | on the current command, rather than checking $FCEDIT and $EDITOR. | |
2507 | ||
2508 | s. Fixed a small memory leak in the pathname canonicalization code. | |
2509 | ||
2510 | t. Fixed a bug that caused the expanded value of a $'...' string to be | |
2511 | incorrectly re-quoted if it occurred within a double-quoted ${...} | |
2512 | parameter expansion. | |
2513 | ||
f6410766 CR |
2514 | u. Restored default emacs-mode key binding of M-TAB to dynamic-complete-history. |
2515 | ||
2516 | v. Fixed a bug that caused core dumps when interrupting loops running builtins | |
2517 | on some systems. | |
2518 | ||
2519 | w. Make sure that some of the functions bash provides replacements for are | |
2520 | not cpp defines. | |
2521 | ||
668f5007 CR |
2522 | x. The code that scans embedded commands for the parser (`...` and $(...)) is |
2523 | now more aware of embedded comments and their effect on quoted strings. | |
2524 | ||
2525 | y. Changed the `-n' option to the `history' builtin to not reset the number of | |
2526 | history lines read in the current session after reading the new lines from | |
2527 | the history file if the history is being appended when it is written to | |
2528 | the file, since the appending takes care of the problem that the adjustment | |
2529 | was intended to solve. | |
2530 | ||
2531 | z. Improved the error message displayed when a shell script fails to execute | |
1c72c0cd CR |
2532 | because the environment and size of command line arguments are too large. |
2533 | ||
2534 | aa. A small fix to make sure that $HISTCMD is evaluated whenever the shell is | |
2535 | saving commands to the history list, not just when HISTSIZE is defined. | |
668f5007 | 2536 | |
a2e7f358 CR |
2537 | 2. Changes to Readline |
2538 | ||
2539 | a. The `change-case' command now correctly changes the case of multibyte | |
2540 | characters. | |
2541 | ||
2542 | b. Changes to the shared library construction scripts to deal with Windows | |
2543 | DLL naming conventions for Cygwin. | |
2544 | ||
2545 | c. Fixed the redisplay code to avoid core dumps resulting from a poorly-timed | |
2546 | SIGWINCH. | |
2547 | ||
2548 | d. Fixed the non-incremental search code in vi mode to dispose of any current | |
2549 | undo list when copying a line from the history into the current editing | |
2550 | buffer. | |
2551 | ||
6bf74e5a CR |
2552 | e. The variable assignment code now ignores whitespace at the end of lines |
2553 | when assigning to boolean variables. | |
a2e7f358 | 2554 | |
668f5007 CR |
2555 | f. The `C-w' binding in incremental search now understands multibyte |
2556 | characters. | |
2557 | ||
a2e7f358 CR |
2558 | 3. New Features in Bash |
2559 | ||
2560 | a. A new configuration option, `--enable-strict-posix-default', which will | |
2561 | build bash to be POSIX conforming by default. | |
2562 | ||
2563 | 4. New Features in Readline | |
2564 | ||
f6410766 CR |
2565 | a. If the rl_completion_query_items is set to a value < 0, readline never |
2566 | asks the user whether or not to view the possible completions. | |
2567 | ||
a2e7f358 | 2568 | ------------------------------------------------------------------------------ |
1569c106 CR |
2569 | This document details the changes between this version, bash-3.1-alpha1, |
2570 | and the previous version, bash-3.0-release. | |
2571 | ||
2572 | 1. Changes to Bash | |
2573 | ||
2574 | a. Fixed a bug that caused bash to crash if referencing an unset local array. | |
2575 | ||
2576 | b. Fixed a problem that caused tilde expansion to not be performed before | |
2577 | attempting globbing word completion. | |
2578 | ||
2579 | c. Fixed an incompatibility so that a first argument to trap that's a valid | |
2580 | signal number will be trated as a signal rather than a command to execute. | |
2581 | ||
2582 | d. Fixed ${#word} expansion to correctly compute the length of a string | |
2583 | containing multibyte characters. | |
2584 | ||
2585 | e. Fixed a bug that caused bash to not pass the correct flags for signal | |
2586 | disposition to child processes. | |
2587 | ||
2588 | f. Fixed a bug that caused `fc -l' to list one too many history entries. | |
2589 | ||
2590 | g. Some fixes to `fc' for POSIX conformance. | |
2591 | ||
2592 | h. Some fixes to job status display for POSIX conformance. | |
2593 | ||
2594 | i. Fixed a bug that caused `command -v' to display output if a command was not | |
2595 | found -- it should be silent. | |
2596 | ||
2597 | j. In POSIX mode, `type' and `command -[vV]' do not report non-executable | |
2598 | files, even if the shell will attempt to execute them. | |
2599 | ||
2600 | k. Fixed a bug that caused the `==' operator to the [[ command to not attempt | |
2601 | extended pattern matching. | |
2602 | ||
2603 | l. Fixed the brace expansion code to handle characters whose value exceeds 128. | |
2604 | ||
2605 | m. Fixed `printf' to handle strings with a leading `\0' whose length is | |
2606 | non-zero. | |
2607 | ||
2608 | n. Fixed a couple of problems with brace expansion where `${' was handled | |
2609 | incorrectly. | |
2610 | ||
2611 | o. Fixed off-by-one error when calculating the upper bound of `offset' when | |
2612 | processing the ${array[@]:offset:length} expansion. | |
2613 | ||
2614 | p. System-specific configuration changes for: FreeBSD 5.x, Interix, MacOS X | |
2615 | 10.4, Linux 2.4+ kernels, Linux 3.x kernels, Dragonfly BSD, QNX 6.x, | |
2616 | Cygwin | |
2617 | ||
2618 | q. Fixed a bug that caused the shell to ignore the status of the rightmost | |
2619 | command in a pipeline when the `pipefail' option was enabled. | |
2620 | ||
2621 | r. Fixed a completion bug that caused core dumps when expanding a directory | |
2622 | name. | |
2623 | ||
2624 | s. Fixed a bug that prevented `hash -d' from removing commands from the hash | |
2625 | table. | |
2626 | ||
2627 | t. Fixed word splitting to avoid really bad quadratic performance when | |
2628 | expanding long lists. | |
2629 | ||
2630 | u. Fixed a bug that caused negative offsets in substring expansion to use the | |
2631 | wrong values. | |
2632 | ||
2633 | v. Fixed a bug in printf that caused it to not return failure on write errors. | |
2634 | ||
2635 | w. Fixed a bug that caused commands in subshells to not be properly timed. | |
2636 | ||
2637 | x. The shell parser no longer attempts to parse a compound assignment specially | |
2638 | unless in a position where an assignment statement is acceptable or parsing | |
2639 | arguments to a builtin that accepts assignment statements. | |
2640 | ||
2641 | y. Fixed a problem that caused a `case' statement to be added to the history | |
2642 | incorrectly as a single command if the `case word' was on one line and the | |
2643 | `in' on another. | |
2644 | ||
2645 | z. Fixed a problem that caused internal shell quoting characters to be | |
2646 | incorrectly quoted with backslashes under some circumstances. | |
2647 | ||
2648 | aa. The shell now performs correct word splitting when IFS contains multibyte | |
2649 | characters. | |
2650 | ||
2651 | bb. The mail checking code now resets the cached file information if the size | |
2652 | drops to 0, even if the times don't change. | |
2653 | ||
2654 | cc. A completed command name that is found in $PATH as well as the name of a | |
2655 | directory in the current directory no longer has a slash appended in certain | |
2656 | circumstances: a single instance found in $PATH when `.' is not in $PATH, | |
2657 | and multiple instances found in $PATH, even when `.' is in $PATH. | |
2658 | ||
2659 | dd. Incorporated tilde expansion into the word expansion code rather than as a | |
2660 | separately-called function, fixing some cases where it was performed | |
2661 | inappropriately (e.g., after the second `=' in an assignment statement or | |
2662 | in a double-quoted parameter expansion). | |
2663 | ||
2664 | ee. Fixed several bugs encountered when parsing compound assignment statements, | |
2665 | so that compound assignments appearing as arguments to builtins are no | |
2666 | longer double-expanded. | |
2667 | ||
2668 | ff. Fixed a bug in the command execution code that caused asynchronous commands | |
2669 | containing command substitutions to not put the terminal in the wrong | |
2670 | process group. | |
2671 | ||
2672 | gg. Bash now handles the case where the WCONTINUED flag causes waitpid() to | |
2673 | return -1/EINVAL at runtime as well as configuration time. | |
2674 | ||
2675 | hh. Fixed parser to generate an error when the pipeline `argument' to `!' or | |
2676 | `time' is NULL. | |
2677 | ||
2678 | ii. The shell now takes a little more care when manipulating file descriptors | |
2679 | greater than 9 with the `exec' builtin. | |
2680 | ||
2681 | jj. Fixed a bug that caused variable assignments preceding the `command' builtin | |
2682 | preceding a special builtin to be preserved after the command completed in | |
2683 | POSIX mode. | |
2684 | ||
2685 | kk. Fixed a bug that allowed variables beginning with a digit to be created. | |
2686 | ||
2687 | ll. Fixed a bug that caused a \<newline> to be removed when parsing a $'...' | |
2688 | construct. | |
2689 | ||
2690 | mm. A shell whose name begins with `-' will now be a restricted shell if the | |
2691 | remainder of the name indicates it should be restricted. | |
2692 | ||
2693 | nn. Fixed a bug that could cause a core dump if FUNCNAME were changed or unset | |
2694 | during a function's execution. | |
2695 | ||
2696 | oo. Fixed a bug that caused executing a `return' in a function to not execute | |
2697 | a RETURN trap. The RETURN trap is inherited by shell functions only if | |
2698 | function tracing is globally enabled or has been enabled for that function. | |
2699 | ||
2700 | pp. Fixed cases where var[@] was not handled exactly like var, when var is a | |
2701 | scalar variable. | |
2702 | ||
2703 | qq. Fixed a bug that caused the first character after a SIGINT to be discarded | |
2704 | under certain circumstances. | |
2705 | ||
2706 | rr. Fixed exit status code so that a suspended job returns 128+signal as its | |
2707 | exit status (preventing commands after it in `&&' lists from being | |
2708 | executed). | |
2709 | ||
2710 | ss. Fixed a bug that caused the shell parser state to be changed by executing | |
2711 | a shell function as a result of word completion. | |
2712 | ||
2713 | tt. Fixed a long-standing bug that caused '\177' characters in variable | |
2714 | values to be discarded when expanded in double-quoted strings. | |
2715 | ||
2716 | uu. Fixed a bug that caused $RANDOM to be re-seeded multiple times in a | |
2717 | subshell environment. | |
2718 | ||
2719 | vv. Extensive changes to the job management code to avoid the pid-reuse and | |
2720 | pid-aliasing problems caused by retaining the exit status of too many jobs, | |
2721 | but still retain as many background job statuses as POSIX requires. | |
2722 | ||
2723 | ww. Fixed a parser bug in processing \<newline> that caused things like | |
2724 | ||
2725 | ((echo 5) \ | |
2726 | (echo 6)) | |
2727 | ||
2728 | to not work correctly. | |
2729 | ||
2730 | xx. `pwd -P' now sets $PWD to a directory name containing no symbolic links | |
2731 | when in posix mode, as POSIX requires. | |
2732 | ||
2733 | yy. In posix mode, bash no longer sets $PWD to a name containing no symbolic | |
2734 | links if a directory is chosen from $CDPATH. | |
2735 | ||
2736 | zz. The word splitting code now treats an IFS character that is not space, | |
2737 | tab, or newline and any adjacent IFS white space as a single delimiter, as | |
2738 | SUSv3/XPG6 require. | |
2739 | ||
2740 | aaa. The `read' builtin now checks whether or not the number of fields read is | |
2741 | exactly the same as the number of variables instead of just assigning the | |
2742 | rest of the line (minus any trailing IFS white space) to the last | |
2743 | variable. This is what POSIX/SUS/XPG all require. | |
2744 | ||
2745 | bbb. Fixed a bug that caused `read' to always check whether or not fd 0 was a | |
2746 | pipe, even when reading from another file descriptor. | |
2747 | ||
2748 | ccc. Fixed a bug that caused short-circuiting of execution even if the return | |
2749 | value was being inverted. | |
2750 | ||
2751 | ddd. Fixed a bug that caused a core dump while decoding \W escapes in PS1 if | |
2752 | PWD was unset. | |
2753 | ||
2754 | eee. Fixed a bug in `read' that counted internal quoting characters for the | |
2755 | purposes of `read -n'. | |
2756 | ||
2757 | fff. Fixed a bug so that a function definition in a pipeline causes a child | |
2758 | process to be forked at the right time. | |
2759 | ||
2760 | ggg. Bash will not attempt to link against a readline library that doesn't | |
2761 | have rl_gnu_readline_p == 1. | |
2762 | ||
2763 | hhh. Fixed a bug that caused `read' to consume one too many characters when | |
2764 | reading a fixed number of characters and the Nth character is a backslash. | |
2765 | ||
2766 | iii. Fixed a bug that caused `unset' on variables in the temporary environment | |
2767 | to leave them set when `unset' completed. | |
2768 | ||
2769 | jjj. Fixed a bug that caused bash to close fd 2 if an `exec' failed and the | |
2770 | shell didn't exit. | |
2771 | ||
2772 | kkk. The completion code is more careful to not turn `/' or `///' into `//', | |
2773 | for those systems on which `//' has special meaning. | |
2774 | ||
2775 | lll. Fixed a bug that caused command substitution in asynchronous commands to | |
2776 | close the wrong file descriptors. | |
2777 | ||
2778 | mmm. The shell no longer prints status messages about terminated background | |
2779 | processes unless job control is active. | |
2780 | ||
2781 | nnn. Fixed a bug that prevented multiple consecutive invocations of `history -s' | |
2782 | from adding all the commands to the history list. | |
2783 | ||
2784 | ooo. Added a couple of changes to make arithmetic expansion more consistent in | |
2785 | all its contexts (still not perfect). | |
2786 | ||
2787 | ppp. Fixed a bug that caused the parser to occasionally not find the right | |
2788 | terminating "`" in an old-style command substitution. | |
2789 | ||
2790 | qqq. Fixed a bug that caused core dumps when the shell was reading its non- | |
2791 | interactive input from fd 0 and fd 0 was duplicated and restored using a | |
2792 | combination of `exec' (to save) and redirection (to restore). | |
2793 | ||
f5635ecd CR |
2794 | rrr. Fixed a problem that caused loops in sourced scripts to not be cleaned |
2795 | up properly when a `return' is executed. | |
2796 | ||
2797 | sss. Change internal command substitution completion function to append a slash | |
2798 | to directory names in the command. | |
2799 | ||
1569c106 CR |
2800 | 2. Changes to Readline |
2801 | ||
2802 | a. Fixed a bug that caused multiliine prompts to be wrapped and displayed | |
2803 | incorrectly. | |
2804 | ||
2805 | b. Fixed a bug that caused ^P/^N in emacs mode to fail to display the current | |
2806 | line correctly. | |
2807 | ||
2808 | c. Fixed a problem in computing the number of invisible characters on the first | |
2809 | line of a prompt whose length exceeds the screen width. | |
2810 | ||
2811 | d. Fixed vi-mode searching so that failure preserves the current line rather | |
2812 | than the last line in the history list. | |
2813 | ||
2814 | e. Fixed the vi-mode `~' command (change-case) to have the correct behavior at | |
2815 | end-of-line when manipulating multibyte characters. | |
2816 | ||
2817 | f. Fixed the vi-mode `r' command (change-char) to have the correct behavior at | |
2818 | end-of-line when manipulating multibyte characters. | |
2819 | ||
2820 | g. Fixed multiple bugs in the redisplay of multibyte characters: displaying | |
2821 | prompts longer than the screen width containing multibyte characters, | |
2822 | ||
2823 | h. Fix the calculation of the number of physical characters in the prompt | |
2824 | string when it contains multibyte characters. | |
2825 | ||
2826 | i. A non-zero value for the `rl_complete_suppress_append' variable now causes | |
2827 | no `/' to be appended to a directory name. | |
2828 | ||
2829 | j. Fixed forward-word and backward-word to work when words contained | |
2830 | multibyte characters. | |
2831 | ||
2832 | k. Fixed a bug in finding the delimiter of a `?' substring when performing | |
2833 | history expansion in a locale that supports multibyte characters. | |
2834 | ||
2835 | l. Fixed a memory leak caused by not freeing the timestamp in a history entry. | |
2836 | ||
2837 | m. Fixed a bug that caused "\M-x" style key bindings to not obey the setting | |
2838 | of the `convert-meta' variable. | |
2839 | ||
2840 | n. Fixed saving and restoring primary prompt when prompting for incremental | |
2841 | and non-incremental searches; search prompts now display multibyte | |
2842 | characters correctly. | |
2843 | ||
2844 | o. Fixed a bug that caused keys originally bound to self-insert but shadowed | |
2845 | by a multi-character key sequence to not be inserted. | |
2846 | ||
2847 | p. Fixed code so rl_prep_term_function and rl_deprep_term_function aren't | |
2848 | dereferenced if NULL (matching the documentation). | |
2849 | ||
2850 | q. Extensive changes to readline to add enough state so that commands | |
2851 | requiring additional characters (searches, multi-key sequences, numeric | |
2852 | arguments, commands requiring an additional specifier character like | |
2853 | vi-mode change-char, etc.) work without synchronously waiting for | |
2854 | additional input. | |
2855 | ||
2856 | r. Lots of changes so readline builds and runs on MinGW. | |
2857 | ||
2858 | s. Readline no longer tries to modify the terminal settings when running in | |
2859 | callback mode. | |
2860 | ||
f5635ecd CR |
2861 | t. The Readline display code no longer sets the location of the last invisible |
2862 | character in the prompt if the \[\] sequence is empty. | |
2863 | ||
1569c106 CR |
2864 | 3. New Features in Bash |
2865 | ||
2866 | a. Bash now understands LC_TIME as a special variable so that time display | |
2867 | tracks the current locale. | |
2868 | ||
2869 | b. BASH_ARGC, BASH_ARGV, BASH_SOURCE, and BASH_LINENO are no longer created | |
2870 | as `invisible' variables and may not be unset. | |
2871 | ||
2872 | c. In POSIX mode, if `xpg_echo' option is enabled, the `echo' builtin doesn't | |
2873 | try to interpret any options at all, as POSIX requires. | |
2874 | ||
2875 | d. The `bg' builtin now accepts multiple arguments, as POSIX seems to specify. | |
2876 | ||
2877 | e. Fixed vi-mode word completion and glob expansion to perform tilde | |
2878 | expansion. | |
2879 | ||
2880 | f. The `**' mathematic exponentiation operator is now right-associative. | |
2881 | ||
2882 | g. The `ulimit' builtin has new options: -i (max number of pending signals), | |
2883 | -q (max size of POSIX message queues), and -x (max number of file locks). | |
2884 | ||
2885 | h. A bare `%' once again expands to the current job when used as a job | |
2886 | specifier. | |
2887 | ||
2888 | i. The `+=' assignment operator (append to the value of a string or array) is | |
2889 | now supported for assignment statements and arguments to builtin commands | |
2890 | that accept assignment statements. | |
2891 | ||
2892 | j. BASH_COMMAND now preserves its value when a DEBUG trap is executed. | |
2893 | ||
2894 | k. The `gnu_errfmt' option is enabled automatically if the shell is running | |
2895 | in an emacs terminal window. | |
2896 | ||
2897 | l. New configuration option: --single-help-strings. Causes long help text | |
2898 | to be written as a single string; intended to ease translation. | |
2899 | ||
2900 | m. The COMP_WORDBREAKS variable now causes the list of word break characters | |
2901 | to be emptied when the variable is unset. | |
2902 | ||
2903 | n. An unquoted expansion of $* when $IFS is empty now causes the positional | |
2904 | parameters to be concatenated if the expansion doesn't undergo word | |
2905 | splitting. | |
2906 | ||
2907 | o. Bash now inherits $_ from the environment if it appears there at startup. | |
2908 | ||
2909 | p. New shell option: nocasematch. If non-zero, shell pattern matching ignores | |
2910 | case when used by `case' and `[[' commands. | |
2911 | ||
2912 | q. The `printf' builtin takes a new option: -v var. That causes the output | |
2913 | to be placed into var instead of on stdout. | |
2914 | ||
2915 | r. By default, the shell no longer reports processes dying from SIGPIPE. | |
2916 | ||
2917 | s. Bash now sets the extern variable `environ' to the export environment it | |
2918 | creates, so C library functions that call getenv() (and can't use the | |
2919 | shell-provided replacement) get current values of environment variables. | |
2920 | ||
2921 | 4. New Features in Readline | |
2922 | ||
2923 | a. The key sequence sent by the keypad `delete' key is now automatically | |
2924 | bound to delete-char. | |
2925 | ||
2926 | b. A negative argument to menu-complete now cycles backward through the | |
2927 | completion list. | |
2928 | ||
2929 | c. A new bindable readline variable: bind-tty-special-chars. If non-zero, | |
2930 | readline will bind the terminal special characters to their readline | |
2931 | equivalents when it's called (on by default). | |
2932 | ||
2933 | d. New bindable command: vi-rubout. Saves deleted text for possible | |
2934 | reinsertion, as with any vi-mode `text modification' command; `X' is bound | |
2935 | to this in vi command mode. | |
2936 | ||
2937 | ------------------------------------------------------------------------------ | |
3ede1caa CR |
2938 | This document details the changes between this version, bash-3.0-release, |
2939 | and the previous version, bash-3.0-rc1. | |
2940 | ||
2941 | 1. Changes to Bash | |
2942 | ||
2943 | a. Fixed a boundary overrun that could cause segmentation faults when the | |
2944 | completion code hands an incomplete construct to the word expansion | |
2945 | functions. | |
2946 | ||
2947 | b. Changed posix mode behavior so that an error in a variable assignment | |
2948 | preceding a special builtin causes a non-interactive shell to exit. | |
2949 | ||
2950 | c. Change the directory expansion portion of the completion code to not | |
2951 | expand embedded command substitutions if the directory name appears in | |
2952 | the file system. | |
2953 | ||
a5e25162 CR |
2954 | d. Fixed a problem that caused `bash -r' to turn on restrictions before |
2955 | reading the startup files. | |
2956 | ||
2957 | e. Fixed a problem with the default operation of the `umask' builtin. | |
2958 | ||
3ede1caa CR |
2959 | 2. Changes to Readline |
2960 | ||
2961 | a. Fixed a problem with readline saving the contents of the current line | |
2962 | before beginning a non-interactive search. | |
2963 | ||
a5e25162 CR |
2964 | b. Fixed a problem with EOF detection when using rl_event_hook. |
2965 | ||
2966 | c. Fixed a problem with the vi mode `p' and `P' commands ignoring numeric | |
2967 | arguments. | |
2968 | ||
3ede1caa | 2969 | ------------------------------------------------------------------------------ |
762a763b CR |
2970 | This document details the changes between this version, bash-3.0-rc1, |
2971 | and the previous version, bash-3.0-beta1. | |
2972 | ||
2973 | 1. Changes to Bash | |
2974 | ||
2975 | a. Fixed a bug that caused incorrect behavior when referecing element 0 of | |
2976 | an array using $array, element 0 was unset, and `set -u' was enabled. | |
2977 | ||
2978 | b. System-specific changes for: SCO Unix 3.2, Tandem. | |
2979 | ||
2980 | c. Fixed a bug that caused inappropriate word splitting when a variable was | |
2981 | expanded within a double-quoted string that also included $@. | |
2982 | ||
2983 | d. Fixed a bug that caused `pwd' to not display anything in physical mode | |
2984 | when the file system had changed underneath the shell. | |
2985 | ||
2986 | e. Fixed a bug in the pre- and post- increment and decrement parsing in the | |
2987 | expression evaluator that caused errors when the operands and corresponding | |
2988 | operators were separated by whitespace. | |
f085a21f CR |
2989 | |
2990 | f. Fixed a bug that caused `history -p' to add an entry to the history list, | |
2991 | counter to the documentation. (Keeps the history expansions invoked by | |
2992 | emacs-mode command line editing from doing that as well.) | |
2993 | ||
2994 | g. Fixed a bug that could cause a core dump if `cd' is asked to print out a | |
2995 | pathname longer than PATH_MAX characters. | |
2996 | ||
2997 | h. Fixed a bug that caused jobs to be put into the wrong process group under | |
2998 | some circumstances after enabling job control with `set -m'. | |
2999 | ||
3000 | i. `unalias' now returns failure if no alias name arguments are supplied. | |
3001 | ||
3002 | j. Documented the characters not allowed to appear in an alias name. | |
3003 | ||
3004 | k. $* is no longer expanded as if in double quotes when it appears in the | |
3005 | body of a here document, as the SUS seems to require. | |
3006 | ||
3007 | l. The `bashbug' script now uses a directory in $TMPDIR for exclusive | |
3008 | access rather than trying to guess how the underlying OS provides for | |
3009 | secure temporary file creation. | |
3010 | ||
3011 | m. Fixed a few problems with `cd' and `pwd' when asked to operate on pathnames | |
3012 | longer than PATH_MAX characters. | |
3013 | ||
3014 | n. Fixed a memory leak caused when creating multiple local array variables | |
3015 | with identical names. | |
3016 | ||
61deeb13 CR |
3017 | o. Fixed a problem with calls to getcwd() so that bash now operates better |
3018 | when the full pathname to the current directory is longer than PATH_MAX | |
3019 | bytes. | |
3020 | ||
3021 | p. The `trap' builtin now reports an error if a single non-signal argument | |
3022 | is specified. | |
3023 | ||
56299fa5 CR |
3024 | q. Fixed a bug that caused `umask' to not work correctly when presented |
3025 | with a mask of all 0s. | |
3026 | ||
3027 | r. When `getopts' reaches the end of options, OPTARG is unset, as POSIX | |
3028 | appears to specify. | |
3029 | ||
3030 | s. Interactive mode now depends on whether or not stdin and stderr are | |
3031 | connected to a tty; formerly it was stdin and stdout. POSIX requires | |
3032 | this. | |
3033 | ||
3034 | t. Fixed vi-mode completion to work more as POSIX specifies (e.g., doing the | |
3035 | right kind of filename generation). | |
3036 | ||
f085a21f CR |
3037 | 2. Changes to Readline |
3038 | ||
3039 | a. Fixed a problem that could cause readline to refer to freed memory when | |
3040 | moving between history lines while doing searches. | |
3041 | ||
3042 | b. Improvements to the code that expands and displays prompt strings | |
3043 | containing multibyte characters. | |
3044 | ||
3045 | c. Fixed a problem with vi-mode not correctly remembering the numeric argument | |
3046 | to the last `c'hange command for later use with `.'. | |
3047 | ||
3048 | d. Fixed a bug in vi-mode that caused multi-digit count arguments to work | |
3049 | incorrectly. | |
3050 | ||
3051 | e. Fixed a problem in vi-mode that caused the last text modification command | |
3052 | to not be remembered across different command lines. | |
3053 | ||
56299fa5 CR |
3054 | f. Fixed problems with changing characters and changing case at the end of |
3055 | the line. | |
3056 | ||
f085a21f CR |
3057 | 3. New Features in Bash |
3058 | ||
3059 | a. The `jobs', `kill', and `wait' builtins now accept job control notation | |
3060 | even if job control is not enabled. | |
3061 | ||
61deeb13 CR |
3062 | b. The historical behavior of `trap' that allows a missing `action' argument |
3063 | to cause each specified signal's handling to be reset to its default is | |
3064 | now only supported when `trap' is given a single non-option argument. | |
3065 | ||
56299fa5 CR |
3066 | 4. New Features in Readline |
3067 | ||
3068 | a. When listing completions, directories have a `/' appended if the | |
3069 | `mark-directories' option has been enabled. | |
3070 | ||
762a763b | 3071 | ------------------------------------------------------------------------------ |
12d937f9 CR |
3072 | This document details the changes between this version, bash-3.0-beta1, |
3073 | and the previous version, bash-3.0-alpha. | |
d3a24ed2 CR |
3074 | |
3075 | 1. Changes to Bash | |
3076 | ||
545f34cf CR |
3077 | a. Fixes to build correctly when arrays are not compiled into the shell. |
3078 | ||
3079 | b. Fixed command substitution to run any exit trap defined in the command | |
3080 | substitution before returning; the exit trap is not inherited from the | |
3081 | calling shell. | |
3082 | ||
3083 | c. Fixes to process group synchronization code so that every child process | |
3084 | attempts to set the terminal's process group; fixes some synchronization | |
3085 | problems on Linux kernels that schedule the child to always run before | |
3086 | the parent. | |
3087 | ||
3088 | d. Fixed processing of octal and hex constants in printf builtin for POSIX.2 | |
3089 | compliance. | |
3090 | ||
3091 | e. Fixed a couple of core dumps in the pattern removal code. | |
3092 | ||
3093 | f. Fixes to the array subrange extraction code to deal better with sparse | |
3094 | arrays. | |
3095 | ||
3096 | g. Parser errors and other errors that result in the shell exiting now cause | |
3097 | the exit trap to be run. | |
3098 | ||
3099 | h. Change the command substitution completion functions to not append any | |
3100 | closing quote, because it would be inserted a closing "`" or ")". | |
3101 | ||
3102 | i. Fix history initialization so assignments to $histchars made in startup | |
3103 | files are honored. | |
3104 | ||
3105 | j. If an exit trap does not contain a call to `exit', the shell now uses | |
3106 | the exit status of the last command executed before the trap as the exit | |
3107 | status of the shell. | |
3108 | ||
3109 | k. The parser now prompts with $PS2 if it reads a newline while parsing a | |
3110 | compound array assignment statement. | |
3111 | ||
3112 | l. When performing a compound array assignment, the parser doesn't treat | |
3113 | words of the form [index]=value as assignments if they're the result of | |
3114 | expansions. | |
3115 | ||
3116 | m. Fixed a bug that caused `return' executed in a trap command to make the | |
3117 | shell think it was still running the trap. | |
3118 | ||
3119 | n. Fixed the value of errno set by the pathname canonicalization functions. | |
3120 | ||
3121 | o. Changed the grammar so that `time' alone on a line times a null command | |
3122 | rather than being a syntax error. | |
3123 | ||
d11b8b46 | 3124 | p. The pattern substitution code no longer performs quote removal on the |
545f34cf CR |
3125 | pattern before trying to match it, as the pattern removal functions do. |
3126 | ||
3127 | q. Fixed a bug that could cause core dumps when checking whether a quoted | |
3128 | command name was being completed. | |
3129 | ||
3130 | r. Fixes to the pattern removal and pattern replacement expansions to deal | |
f9732a04 | 3131 | with multibyte characters better (and faster). |
545f34cf CR |
3132 | |
3133 | s. Fix to the substring expansion (${param:off[:len]}) to deal with (possibly | |
3134 | multibyte) characters instead of raw bytes. | |
3135 | ||
12d937f9 CR |
3136 | t. Fixed a bug that caused some key bindings set in an inputrc to be ignored |
3137 | at shell startup. | |
3138 | ||
3139 | u. Fixed a bug that caused unsetting a local variable within a function to | |
3140 | not work correctly. | |
3141 | ||
3142 | v. Fixed a bug that caused invalid variables to be created when using | |
3143 | `read -a'. | |
3144 | ||
3145 | w. Fixed a bug that caused "$@" to expand incorrectly when used as the right | |
3146 | hand side of a parameter expansion such as ${word:="$@"} if the first | |
3147 | character of $IFS was not a space. | |
3148 | ||
f9732a04 CR |
3149 | x. Fixed a slight cosmetic problem when printing commands containing a |
3150 | `>&word' redirection. | |
3151 | ||
fb65be05 CR |
3152 | y. Fixed a problem that could cause here documents to not be created correctly |
3153 | if the system temporary directory did not allow writing. | |
3154 | ||
545f34cf CR |
3155 | 2. Changes to Readline |
3156 | ||
3157 | a. Change to history expansion functions to treat `^' as equivalent to word | |
3158 | one, as the documention states. | |
3159 | ||
3160 | b. Some changes to the display code to improve display and redisplay of | |
3161 | multibyte characters. | |
3162 | ||
3163 | c. Changes to speed up the multibyte character redisplay code. | |
3164 | ||
3165 | d. Fixed a bug in the vi-mode `E' command that caused it to skip over the | |
3166 | last character of a word if invoked while point was on the word's | |
3167 | next-to-last character. | |
3168 | ||
3169 | e. Fixed a bug that could cause incorrect filename quoting when | |
3170 | case-insensitive completion was enabled and the word being completed | |
3171 | contained backslashes quoting word break characters. | |
3172 | ||
3173 | f. Fixed a bug in redisplay triggered when the prompt string contains | |
3174 | invisible characters. | |
3175 | ||
43cdcad8 CR |
3176 | g. Fixed some display (and other) bugs encountered in multibyte locales |
3177 | when a non-ascii character was the last character on a line. | |
3178 | ||
3179 | h. Fixed some display bugs caused by multibyte characters in prompt strings. | |
3180 | ||
704a1a2a CR |
3181 | i. Fixed a problem with history expansion caused by non-whitespace characters |
3182 | used as history word delimiters. | |
3183 | ||
545f34cf CR |
3184 | 3. New Features in Bash |
3185 | ||
3186 | a. printf builtin understands two new escape sequences: \" and \?. | |
3187 | ||
3188 | b. `echo -e' understands two new escape sequences: \" and \?. | |
3189 | ||
3190 | c. The GNU `gettext' package and libintl have been integrated; the shell's | |
3191 | messages can be translated into different languages. | |
3192 | ||
12d937f9 CR |
3193 | d. The `\W' prompt expansion now abbreviates $HOME as `~', like `\w'. |
3194 | ||
3195 | e. The error message printed when bash cannot open a shell script supplied | |
3196 | as argument 1 now includes the name of the shell, to better identify | |
3197 | the error as coming from bash. | |
3198 | ||
545f34cf CR |
3199 | 4. New Features in Readline |
3200 | ||
3201 | a. New application variable, rl_completion_quote_character, set to any | |
3202 | quote character readline finds before it calls the application completion | |
3203 | function. | |
3204 | ||
3205 | b. New application variable, rl_completion_suppress_quote, settable by an | |
3206 | application completion function. If set to non-zero, readline does not | |
3207 | attempt to append a closing quote to a completed word. | |
3208 | ||
3209 | c. New application variable, rl_completion_found_quote, set to a non-zero | |
3210 | value if readline determines that the word to be completed is quoted. | |
3211 | Set before readline calls any application completion function. | |
3212 | ||
113d85a4 CR |
3213 | d. New function hook, rl_completion_word_break_hook, called when readline |
3214 | needs to break a line into words when completion is attempted. Allows | |
3215 | the word break characters to vary based on position in the line. | |
3216 | ||
3217 | e. New bindable command: unix-filename-rubout. Does the same thing as | |
3218 | unix-word-rubout, but adds `/' to the set of word delimiters. | |
3219 | ||
545f34cf CR |
3220 | ------------------------------------------------------------------------------ |
3221 | This document details the changes between this version, bash-3.0-alpha, | |
3222 | and the previous version, bash-2.05b-release. | |
3223 | ||
3224 | 1. Changes to Bash | |
3225 | ||
d3a24ed2 CR |
3226 | a. Fixes so that the shell will compile without some of the default options |
3227 | defined. | |
3228 | ||
3229 | b. Fixed an error message that did not pass enough arguments to printf. | |
3230 | ||
3231 | c. Fixed a bug that caused input redirection to a builtin inside a script | |
3232 | being read from standard input to result in the rest of the already- | |
3233 | read and buffered script to be discarded. | |
3234 | ||
3235 | d. Fixed a bug that caused subshell initialization to close the file | |
3236 | descriptor from which the shell was reading a script under certain | |
3237 | circumstances. | |
3238 | ||
3239 | e. Fixed a bug that caused the shell to not advance a string pointer over | |
3240 | a null wide character when doing string operations. | |
3241 | ||
3242 | f. Fixed the internal logout code so that shells that time out waiting for | |
3243 | input (using $TMOUT) run ~/.bash_logout. | |
3244 | ||
3245 | g. Portability and configuration changes for: cygwin, HP/UX, GNU/FreeBSD. | |
3246 | ||
3247 | h. The parser no longer adds implicit double quotes to ((...)) arithmetic | |
3248 | commands. | |
3249 | ||
3250 | i. The ((...)) arithmetic command evaluation code was fixed to not dump core | |
3251 | when the expanded string is null. | |
3252 | ||
3253 | j. The ((...)) arithmetic command evaluation code was fixed to not perform | |
3254 | variable assignments while expanding the expression. | |
3255 | ||
3256 | k. Fixed a bug that caused word splitting to be performed incorrectly when | |
3257 | IFS is set, but null. | |
3258 | ||
3259 | l. Fixed a bug in brace expansion that caused a quoted `$' preceding an | |
3260 | open brace to inhibit brace expansion. | |
3261 | ||
3262 | m. Fixed a bug that caused a leading `-' in the shell's name to cause it to | |
3263 | not be recognized as a restricted shell. | |
3264 | ||
3265 | n. Fixed a bug in the arithmetic evaluation code that could cause longjmps | |
3266 | to an invalid location and result in a core dump. | |
3267 | ||
3268 | o. Fixed a bug in the calculation of how many history lines are new in a | |
3269 | single shell session when reading new history lines from a file with | |
3270 | `history -n'. | |
3271 | ||
3272 | p. Fixed a bug in pathname canonicalization that caused the shell to dump | |
3273 | core when presented with a pathname longer than PATH_MAX. | |
3274 | ||
3275 | q. Fixed the parser so that it doesn't try to compare a char variable to | |
3276 | EOF, which fails when chars are unsigned. | |
3277 | ||
3278 | r. Fixed a bug in the simple command execution code that caused occasional | |
3279 | core dumps. | |
3280 | ||
3281 | s. The shell does a better job of saving any partial parsing state during | |
3282 | operations which cause a command to be executed while a line is being | |
3283 | entered and parsed. | |
3284 | ||
3285 | t. The completion code now splits words more like the expansion code when | |
3286 | $IFS is used to split. | |
3287 | ||
3288 | u. The locale code does a better job of recomputing the various locale | |
3289 | variable values when LC_ALL is unset. | |
3290 | ||
3291 | v. The programmable completion code does a better job of dequoting expanded | |
3292 | word lists before comparing them against the word to be matched. | |
3293 | ||
3294 | w. The shell no longer seg faults if the expanded value of $PS4 is null | |
3295 | and `set -x' is enabled. | |
3296 | ||
3297 | x. Fixed a bug that caused core dumps when a here string expanded to NULL. | |
3298 | ||
3299 | y. The mail checking code now makes sure the mailbox is bigger before | |
3300 | reporting the existence of new mail. | |
3301 | ||
3302 | z. The parser does not try to expand $'...' and $"..." when the appear | |
3303 | within double quotes unless the `extquote' option has been enabled with | |
3304 | `shopt'. For backwards compatibility, it is enabled by default. | |
3305 | ||
3306 | aa. Fixed a bug that caused `for x; do ...' and `select x; do ... to use | |
3307 | $@ instead of "$@" for the implicit list of arguments. | |
3308 | ||
3309 | bb. Fixed a bug that caused a subshell of a restricted shell (e.g., one | |
3310 | spawned to execute a pipeline) to not exit immediately if attempting | |
3311 | to use a command containing a slash. | |
3312 | ||
3313 | cc. Fixed a problem with empty replacements for a pattern that doesn't match | |
3314 | when performing ${param/word/} expansion. | |
3315 | ||
3316 | dd. Word expansions performed while expanding redirections no longer search | |
3317 | a command's temporary environment to expand variable values. | |
3318 | ||
3319 | ee. Improvements to the alias expansion code when expanding subsequent words | |
3320 | because an aliase's value ends with a space. | |
3321 | ||
3322 | ff. `cd -' now prints the current working directory after a successful chdir | |
3323 | even when the shell is not interactive, as the standard requires. | |
3324 | ||
3325 | gg. The shell does a better job of ensuring a child process dies of SIGINT | |
3326 | before resending SIGINT to itself. | |
3327 | ||
3328 | hh. The arithmetic expansion variable assignment code now does the right | |
3329 | thing when assigning to `special' variables like OPTIND. | |
3330 | ||
3331 | ii. When history expansion verification is enabled, the bash readline helper | |
3332 | functions that do history expansion on the current line don't print | |
3333 | the results. | |
3334 | ||
3335 | jj. Fixed bugs with multiple consecutive alias expansion when one of the | |
3336 | expansions ends with a space. | |
3337 | ||
3338 | kk. Fixed a problem in the programmable completion code that could cause core | |
3339 | dumps when trying to initialize a set of possible completions from a | |
3340 | list of variables. | |
3341 | ||
3342 | ll. The \[ and \] escape characters are now ignored when decoding the prompt | |
3343 | string if the shell is started with editing disabled. | |
3344 | ||
3345 | mm. Fixed a bug that could leave extra characters in a string when doing | |
3346 | quoted null character removal. | |
3347 | ||
3348 | nn. Command substitution and other subshell operations no longer reset the | |
3349 | line number (aids the bash debugger). | |
3350 | ||
3351 | oo. Better line number management when executing simple commands, conditional | |
3352 | commands, for commands, and select commands. | |
3353 | ||
3354 | pp. The globbing code now uses malloc, with its better failure properties, | |
3355 | rather than alloca(). | |
3356 | ||
3357 | qq. Fixed a bug that caused expansions like #{a[2]:=value} to create the | |
3358 | appropriate array element instead of a variable named `a[2]'. | |
3359 | ||
3360 | rr. Fixed a bug in the handling of a `?(...)' pattern immediately following | |
3361 | a `*' when extglob is enabled. | |
3362 | ||
3363 | ss. Fixed a bug that caused a `return' invoked in an exit trap when exit is | |
3364 | invoked in a function to misbehave. | |
3365 | ||
3366 | tt. Fixed a bug that caused CTLESC and CTLNUL characters to not be escaped | |
3367 | by the internal shell string quoting functions. | |
3368 | ||
5e13499c CR |
3369 | uu. Fixed a bug that caused quoted null characters in an expanded word list |
3370 | to be inappropriately assigned to an array variable when using `read -a'. | |
d3a24ed2 CR |
3371 | |
3372 | vv. Fixed a bug that caused redirections accompanying a null command to persist | |
3373 | in the current shell. | |
3374 | ||
3375 | ww. Fixed a bug that caused the prompt to be printed when the shell was | |
3376 | expanding a multiline alias. | |
3377 | ||
3378 | xx. Fixed a bug that resulted in core dumps when the completion for a command | |
3379 | changed the compspec. | |
3380 | ||
3381 | yy. Fixed a bug that caused evaluation of programmable completions to print | |
3382 | notifications of completed jobs. | |
3383 | ||
3384 | zz. Bash now disables line editing when $EMACS == `t' and $TERM == `dumb' | |
3385 | (which is what emacs shell windows do). | |
3386 | ||
3387 | aaa. In posix mode, `kill -l' causes signal names to be displayed without | |
3388 | a leading `SIG'. | |
3389 | ||
3390 | bbb. Clear error flag on standard output so it doesn't persist across multiple | |
3391 | builtin commands. | |
3392 | ||
3393 | ccc. In posix mode, `alias' displays alias values without the leading `alias', | |
3394 | so the output cannot be used as subsequent input. | |
3395 | ||
3396 | ddd. In posix mode, the `trap' builtin doesn't check whether or not its | |
3397 | first argument is a signal specification and revert the signal handling | |
3398 | to its original disposition if it is. | |
3399 | ||
3400 | eee. Fixed several bugs in the handling of "$*" and "${array[*]}" by the | |
3401 | pattern substitution and removal expansions. | |
3402 | ||
3403 | fff. Fixed several problems with the handling of ${array[@]}, ${array[*]}, | |
3404 | $@, and $* by the indirect variable expansion code. | |
3405 | ||
3406 | ggg. Fixed a bug that did not allow `time' to be aliased. | |
3407 | ||
3408 | hhh. Improved the mail checking code so it won't check (and possibly cause an | |
3409 | NFS file system mount) until MAILPATH or MAIL is given a value -- there | |
3410 | is no default if DEFAULT_MAIL_DIRECTORY is not defined at compile time. | |
3411 | (It is computed by configure, but can be #undef'd in config-bot.h.) | |
3412 | ||
3413 | iii. If the `chkwinsize' option is enabled, the shell checks for window size | |
3414 | changes if a child process exits due to a signal. | |
3415 | ||
3416 | jjj. Removed the attempts to avoid adding a slash at the end of a completed | |
3417 | executable name if there was a directory with the same name in the | |
3418 | current directory. | |
3419 | ||
3420 | kkk. Fixed PATH lookup code so it treats the permission bits separately for | |
3421 | owner, group, and other, rather than checking them all. | |
3422 | ||
3423 | lll. Fixed the locale code to reset the parser's idea of the character class | |
3424 | <blank>, which controls how it splits tokens, when the locale changes. | |
3425 | ||
3426 | mmm. The shell now binds its special readline functions and key bindings only | |
3427 | if the user's inputrc file has not already bound them. | |
3428 | ||
3429 | nnn. The shell now reports on processes that dump core due to signals when | |
3430 | invoked as `-c command'. | |
3431 | ||
3432 | 2. Changes to Readline | |
3433 | ||
3434 | a. Fixes to avoid core dumps because of null pointer references in the | |
3435 | multibyte character code. | |
3436 | ||
3437 | b. Fix to avoid infinite recursion caused by certain key combinations. | |
3438 | ||
3439 | c. Fixed a bug that caused the vi-mode `last command' to be set incorrectly. | |
3440 | ||
3441 | d. Readline no longer tries to read ahead more than one line of input, even | |
3442 | when more is available. | |
3443 | ||
3444 | e. Fixed the code that adjusts the point to not mishandle null wide | |
3445 | characters. | |
3446 | ||
3447 | f. Fixed a bug in the history expansion `g' modifier that caused it to skip | |
3448 | every other match. | |
3449 | ||
3450 | g. Fixed a bug that caused the prompt to overwrite previous output when the | |
3451 | output doesn't contain a newline and the locale supports multibyte | |
3452 | characters. This same change fixes the problem of readline redisplay | |
3453 | slowing down dramatically as the line gets longer in multibyte locales. | |
3454 | ||
3455 | h. History traversal with arrow keys in vi insertion mode causes the cursor | |
3456 | to be placed at the end of the new line, like in emacs mode. | |
3457 | ||
3458 | i. The locale initialization code does a better job of using the right | |
3459 | precedence and defaulting when checking the appropriate environment | |
3460 | variables. | |
3461 | ||
3462 | j. Fixed the history word tokenizer to handle <( and >( better when used as | |
3463 | part of bash. | |
3464 | ||
3465 | k. The overwrite mode code received several bug fixes to improve undo. | |
3466 | ||
3467 | l. Many speedups to the multibyte character redisplay code. | |
3468 | ||
3469 | m. The callback character reading interface should not hang waiting to read | |
3470 | keyboard input. | |
3471 | ||
3472 | n. Fixed a bug with redoing vi-mode `s' command. | |
3473 | ||
3474 | o. The code that initializes the terminal tracks changes made to the terminal | |
3475 | special characters with stty(1) (or equivalent), so that these changes | |
3476 | are reflected in the readline bindings. New application-callable function | |
3477 | to make it work: rl_tty_unset_default_bindings(). | |
3478 | ||
3479 | p. Fixed a bug that could cause garbage to be inserted in the buffer when | |
3480 | changing character case in vi mode when using a multibyte locale. | |
3481 | ||
3482 | q. Fixed a bug in the redisplay code that caused problems on systems | |
3483 | supporting multibyte characters when moving between history lines when the | |
3484 | new line has more glyphs but fewer bytes. | |
3485 | ||
3486 | r. Undo and redo now work better after exiting vi insertion mode. | |
3487 | ||
3488 | s. Make sure system calls are restarted after a SIGWINCH is received using | |
3489 | SA_RESTART. | |
3490 | ||
3491 | t. Improvements to the code that displays possible completions when using | |
3492 | multibyte characters. | |
3493 | ||
3494 | u. Fixed a problem when parsing nested if statements in inputrc files. | |
3495 | ||
3496 | v. The completer now takes multibyte characters into account when looking for | |
3497 | quoted substrings on which to perform completion. | |
3498 | ||
3499 | w. The history search functions now perform better bounds checking on the | |
3500 | history list. | |
3501 | ||
3502 | 3. New Features in Bash | |
3503 | ||
3504 | a. ANSI string expansion now implements the \x{hexdigits} escape. | |
3505 | ||
3506 | b. There is a new loadable `strftime' builtin. | |
3507 | ||
3508 | c. New variable, COMP_WORDBREAKS, which controls the readline completer's | |
3509 | idea of word break characters. | |
3510 | ||
3511 | d. The `type' builtin no longer reports on aliases unless alias expansion | |
3512 | will actually be performed. | |
3513 | ||
3514 | e. HISTCONTROL is now a colon-separated list of values, which permits | |
3515 | more extensibility and backwards compatibility. | |
3516 | ||
3517 | f. HISTCONTROL may now include the `erasedups' option, which causes all lines | |
3518 | matching a line being added to be removed from the history list. | |
3519 | ||
3520 | g. `configure' has a new `--enable-multibyte' argument that permits multibyte | |
3521 | character support to be disabled even on systems that support it. | |
3522 | ||
3523 | h. New variables to support the bash debugger: BASH_ARGC, BASH_ARGV, | |
3524 | BASH_SOURCE, BASH_LINENO, BASH_SUBSHELL, BASH_EXECUTION_STRING, | |
3525 | BASH_COMMAND | |
3526 | ||
3527 | i. FUNCNAME has been changed to support the debugger: it's now an array | |
3528 | variable. | |
3529 | ||
3530 | j. for, case, select, arithmetic commands now keep line number information | |
3531 | for the debugger. | |
3532 | ||
3533 | k. There is a new `RETURN' trap executed when a function or sourced script | |
3534 | returns (not inherited child processes; inherited by command substitution | |
3535 | if function tracing is enabled and the debugger is active). | |
3536 | ||
3537 | l. New invocation option: --debugger. Enables debugging and turns on new | |
3538 | `extdebug' shell option. | |
3539 | ||
3540 | m. New `functrace' and `errtrace' options to `set -o' cause DEBUG and ERR | |
3541 | traps, respectively, to be inherited by shell functions. Equivalent to | |
3542 | `set -T' and `set -E' respectively. The `functrace' option also controls | |
3543 | whether or not the DEBUG trap is inherited by sourced scripts. | |
3544 | ||
3545 | n. The DEBUG trap is run before binding the variable and running the action | |
3546 | list in a `for' command, binding the selection variable and running the | |
3547 | query in a `select' command, and before attempting a match in a `case' | |
3548 | command. | |
3549 | ||
3550 | o. New `--enable-debugger' option to `configure' to compile in the debugger | |
3551 | support code. | |
3552 | ||
3553 | p. `declare -F' now prints out extra line number and source file information | |
3554 | if the `extdebug' option is set. | |
3555 | ||
3556 | q. If `extdebug' is enabled, a non-zero return value from a DEBUG trap causes | |
3557 | the next command to be skipped, and a return value of 2 while in a | |
3558 | function or sourced script forces a `return'. | |
3559 | ||
3560 | r. New `caller' builtin to provide a call stack for the bash debugger. | |
3561 | ||
3562 | s. The DEBUG trap is run just before the first command in a function body is | |
3563 | executed, for the debugger. | |
3564 | ||
3565 | t. `for', `select', and `case' command heads are printed when `set -x' is | |
3566 | enabled. | |
3567 | ||
3568 | u. There is a new {x..y} brace expansion, which is shorthand for {x.x+1, | |
3569 | x+2,...,y}. x and y can be integers or single characters; the sequence | |
3570 | may ascend or descend; the increment is always 1. | |
3571 | ||
3572 | v. New ksh93-like ${!array[@]} expansion, expands to all the keys (indices) | |
3573 | of array. | |
3574 | ||
3575 | w. New `force_fignore' shopt option; if enabled, suffixes specified by | |
3576 | FIGNORE cause words to be ignored when performing word completion even | |
3577 | if they're the only possibilities. | |
3578 | ||
3579 | x. New `gnu_errfmt' shopt option; if enabled, error messages follow the `gnu | |
3580 | style' (filename:lineno:message) format. | |
3581 | ||
3582 | y. New `-o bashdefault' option to complete and compgen; if set, causes the | |
3583 | whole set of bash completions to be performed if the compspec doesn't | |
3584 | result in a match. | |
3585 | ||
3586 | z. New `-o plusdirs' option to complete and compgen; if set, causes directory | |
3587 | name completion to be performed and the results added to the rest of the | |
3588 | possible completions. | |
3589 | ||
3590 | aa. `kill' is available as a builtin even when the shell is built without | |
3591 | job control. | |
3592 | ||
3593 | bb. New HISTTIMEFORMAT variable; value is a format string to pass to | |
3594 | strftime(3). If set and not null, the `history' builtin prints out | |
3595 | timestamp information according to the specified format when displaying | |
3596 | history entries. If set, bash tells the history library to write out | |
3597 | timestamp information when the history file is written. | |
3598 | ||
3599 | cc. The [[ ... ]] command has a new binary `=~' operator that performs | |
3600 | extended regular expression (egrep-like) matching. | |
3601 | ||
3602 | dd. `configure' has a new `--enable-cond-regexp' option (enabled by default) | |
3603 | to enable the =~ operator and regexp matching in [[ ... ]]. | |
3604 | ||
3605 | ee. Subexpressions matched by the =~ operator are placed in the new | |
3606 | BASH_REMATCH array variable. | |
3607 | ||
3608 | ff. New `failglob' option that causes an expansion error when pathname | |
3609 | expansion fails to produce a match. | |
3610 | ||
3611 | gg. New `set -o pipefail' option that causes a pipeline to return a failure | |
3612 | status if any of the processes in the pipeline fail, not just the last | |
3613 | one. | |
3614 | ||
3615 | 4. New Features in Readline | |
3616 | ||
3617 | a. History expansion has a new `a' modifier equivalent to the `g' modifier | |
3618 | for compatibility with the BSD csh. | |
3619 | ||
3620 | b. History expansion has a new `G' modifier equivalent to the BSD csh `g' | |
3621 | modifier, which performs a substitution once per word. | |
3622 | ||
3623 | c. All non-incremental search operations may now undo the operation of | |
3624 | replacing the current line with the history line. | |
3625 | ||
3626 | d. The text inserted by an `a' command in vi mode can be reinserted with | |
3627 | `.'. | |
3628 | ||
3629 | e. New bindable variable, `show-all-if-unmodified'. If set, the readline | |
3630 | completer will list possible completions immediately if there is more | |
3631 | than one completion and partial completion cannot be performed. | |
3632 | ||
3633 | f. There is a new application-callable `free_history_entry()' function. | |
3634 | ||
3635 | g. History list entries now contain timestamp information; the history file | |
3636 | functions know how to read and write timestamp information associated | |
3637 | with each entry. | |
3638 | ||
3639 | h. Four new key binding functions have been added: | |
3640 | ||
3641 | rl_bind_key_if_unbound() | |
3642 | rl_bind_key_if_unbound_in_map() | |
3643 | rl_bind_keyseq_if_unbound() | |
3644 | rl_bind_keyseq_if_unbound_in_map() | |
3645 | ||
3646 | ------------------------------------------------------------------------------ | |
7117c2d2 JA |
3647 | This document details the changes between this version, bash-2.05b-release, |
3648 | and the previous version, bash-2.05b-beta2. | |
3649 | ||
3650 | 1. Changes to Bash | |
3651 | ||
3652 | a. Fixed an off-by-one error in the function that translates job | |
3653 | specifications. | |
3654 | ||
3655 | b. Note that we're running under Emacs and disable line editing if | |
3656 | $EMACS == `t'. | |
3657 | ||
3658 | ------------------------------------------------------------------------------ | |
3659 | This document details the changes between this version, bash-2.05b-beta2, | |
3660 | and the previous version, bash-2.05b-beta1. | |
3661 | ||
3662 | 1. Changes to Bash | |
3663 | ||
3664 | a. Fixed the /= and %= arithmetic operators to catch division by zero. | |
3665 | ||
3666 | b. Added putenv, setenv, unsetenv to getenv replacement for completeness. | |
3667 | ||
3668 | c. Fixed a bug that could cause the -O expand_aliases invocation option | |
3669 | to not take effect. | |
3670 | ||
3671 | d. Fixed a problem with process substitution that resulted in incorrect | |
3672 | behavior when the number of process substitutions in an individual | |
3673 | command approached 64. | |
3674 | ||
3675 | 2. Changes to Readline | |
3676 | ||
3677 | a. Fixed a problem with backward-char-search when on a system with support | |
3678 | for multibyte characters when running in a locale without any multibyte | |
3679 | characters. | |
3680 | ||
3681 | ------------------------------------------------------------------------------ | |
3682 | This document details the changes between this version, bash-2.05b-beta1, | |
3683 | and the previous version, bash-2.05b-alpha1. | |
3684 | ||
3685 | 1. Changes to Bash | |
3686 | ||
3687 | a. Fixed a problem when parsing a POSIX.2 character class name while | |
3688 | evaluating a bracket expression containing multibyte characters. | |
3689 | ||
3690 | b. Changed the help text for `bind' to make it clear that any command | |
3691 | that may be placed in ~/.inputrc is a valid argument to `bind'. | |
3692 | ||
3693 | c. Added `help' builtin entries for `((', `[[', and arithmetic for. | |
3694 | ||
3695 | d. malloc updated again: | |
3696 | o slightly better overflow and underflow detection by putting the | |
3697 | chunk size at the beginning and end of the chunk and making | |
3698 | sure they match in free/realloc | |
3699 | o partial page allocated to make things page-aligned no longer | |
3700 | completely wasted | |
3701 | o block coalescing now enabled by default | |
3702 | o splitting and coalescing enabled for 32-byte chunks, the most | |
3703 | common size requested | |
3704 | o fixed a problem that resulted in spurious underflow messages and | |
3705 | aborts | |
3706 | o bin sizes are precomputed and stored in an array rather than | |
3707 | being computed at run time | |
3708 | o malloc will return memory blocks back to the system if the block | |
3709 | being freed is at the top of the heap and of sufficient size to | |
3710 | make it worthwhile | |
3711 | o malloc/free/realloc now inline memset instead of calling the | |
3712 | libc function; uses Duff's device for good performance | |
3713 | ||
3714 | e. Check for getservent(); make the service name completion code dependent | |
3715 | on its presence. | |
3716 | ||
3717 | f. Changed the readline callback that executes a command bound to a key | |
3718 | sequence to not save the executed command on the history list and to | |
3719 | save and restore the parsing state. | |
3720 | ||
3721 | g. Changes to lib/sh/snprintf.c: fixed some bugs in the `g' and `G' | |
3722 | floating point format display; implemented the "'" flag character | |
3723 | that turns on thousands' grouping; fixed behavior on systems where | |
3724 | MB_CUR_MAX does not evaluate to a constant. | |
3725 | ||
3726 | h. The `unset' builtin no longer returns a failure status when asked to | |
3727 | unset a previously-unset variable or function. | |
3728 | ||
3729 | i. Changes to the build system to make it easier to cross-compile bash | |
3730 | for different systems. | |
3731 | ||
3732 | j. Added `,' to the characters that are backslash-escaped during filename | |
3733 | completion, to avoid problems with complete-into-braces and RCS filenames | |
3734 | containing commas. | |
3735 | ||
3736 | k. Some changes to the multibyte character support code to avoid many calls | |
3737 | to strlen(). | |
3738 | ||
3739 | l. Bash now correctly honors setting LANG to some value when LC_ALL does not | |
3740 | already have a value. | |
3741 | ||
3742 | m. Fixed a bug that could cause SIGSEGV when processing nested traps with | |
3743 | trap handlers. | |
3744 | ||
3745 | n. The `source/.' builtin now restores the positional parameters when it | |
3746 | returns unless they were changed using the `set' builtin during the file's | |
3747 | execution. | |
3748 | ||
3749 | o. Fixed a bug that caused a syntax error when a command was terminated by | |
3750 | EOF. | |
3751 | ||
3752 | 2. New Features in Bash | |
3753 | ||
3754 | a. There is now support for placing the long help text into separate files | |
3755 | installed into ${datadir}/bash. Not enabled by default; can be turned | |
3756 | on with `--enable-separate-helpfiles' option to configure. | |
3757 | ||
3758 | b. All builtins that take operands accept a `--' pseudo-option, except | |
3759 | `echo'. | |
3760 | ||
3761 | c. The `echo' builtin now accepts \0xxx (zero to three octal digits following | |
3762 | the `0') in addition to \xxx (one to three octal digits) for SUSv3/XPG6/ | |
3763 | POSIX.1-2001 compliance. | |
3764 | ||
3765 | 3. Changes to Readline | |
3766 | ||
3767 | a. Fixed a small problem in _rl_insert_char with multibyte characters. | |
3768 | ||
3769 | b. Fixes from IBM for line wrapping problems when using multibyte characters. | |
3770 | ||
3771 | c. Fixed a problem which caused the display to be messed up when the last | |
3772 | line of a multi-line prompt (possibly containing invisible characters) | |
3773 | was longer than the screen width. | |
3774 | ||
3775 | d. Fixed a problem with the vi-mode `r' command that ocurred on systems with | |
3776 | support for multibyte characters when running in a locale without any | |
3777 | multibyte characters. | |
3778 | ||
3779 | ------------------------------------------------------------------------------ | |
3780 | This document details the changes between this version, bash-2.05b-alpha1, | |
3781 | and the previous version, bash-2.05a-release. | |
3782 | ||
3783 | 1. Changes to Bash | |
3784 | ||
3785 | a. Some changes to work around inlining differences between compilers. | |
3786 | ||
3787 | b. Added more prototypes for internal shell typedefs, to catch argument | |
3788 | passing errors when using pointers to functions. | |
3789 | ||
3790 | c. The `cd' builtin now fails in posix mode when a valid directory cannot be | |
3791 | constructed from a relative pathname argument and the $PWD using pathname | |
3792 | canonicalization, and the -P option has not been supplied. Previously, | |
3793 | the shell would attempt to use what the user typed, leading to weird | |
3794 | values for $PWD and discrepancies between the value of $PWD and the | |
3795 | actual working directory. | |
3796 | ||
3797 | d. The `cd' builtin now resets $PWD when canonicalization fails but a chdir | |
3798 | to the pathname passed as an argument succeeds (when not in posix mode). | |
3799 | ||
3800 | e. The `fc' builtin has been fixed, as POSIX requires, to use the closest | |
3801 | history position in range when given an out-of-range argument. | |
3802 | ||
3803 | f. The history file loading code was changed to allow lines to be saved in | |
3804 | the history list from the shell startup files. | |
3805 | ||
d3a24ed2 | 3806 | g. `history -s args' now works better in compound commands. |
7117c2d2 JA |
3807 | |
3808 | h. The tilde expansion code was fixed to better recognize when it's being | |
3809 | invoked in an assignment context, which enables expansion after `=' | |
3810 | and `:'. | |
3811 | ||
3812 | i. Fixed the command name completion code so a slash is no longer appended | |
3813 | to a single match if there happens to be a directory with that name in | |
3814 | $PWD. | |
3815 | ||
3816 | j. Fixed compound array assignment to no longer perform alias expansion, to | |
3817 | allow reserved words as array members, and to not produce extra output | |
3818 | when the `-v' option had been enabled. | |
3819 | ||
3820 | k. Fixed the programmable completion code to better handle newlines in lists | |
3821 | of possible completions (e.g., `complete -W'). | |
3822 | ||
3823 | l. Removed the reserved words from the `bash-builtins' manual page. | |
3824 | ||
3825 | m. Parser error reporting now attempts to do a better job of identifying the | |
3826 | token in error rather than doing straight textual analysis. | |
3827 | ||
3828 | n. Fixes for Inf/NaN, locales, wide/multibyte characters and zero-length | |
3829 | arguments in the library snprintf(3) replacement. | |
3830 | ||
3831 | o. `read -e' no longer does command name completion on the first word on | |
3832 | the line being read. | |
3833 | ||
3834 | p. `select' now returns failure if the read of the user's selection fails. | |
3835 | ||
3836 | q. Fixed a bug that could cause a core dump when setting $PIPESTATUS. | |
3837 | ||
3838 | r. Fixes to not allocate so many job slots when the shell is running a loop | |
3839 | with job control enabled in a subshell of an interactive shell. | |
3840 | ||
3841 | s. Fixed a bug in the trap code that caused traps to be inherited by | |
3842 | command substitutions in some cases. | |
3843 | ||
3844 | t. Fixed a bug that could cause alias expansion to inappropriately expand | |
3845 | the word following the alias. | |
3846 | ||
3847 | u. Fixed a bug in the `kill' builtin that mishandled negative pid arguments. | |
3848 | ||
3849 | v. The parser is less lenient when parsing assignment statements where the | |
3850 | characters before the `=' don't comprise a valid identifier. | |
3851 | ||
3852 | w. The arithmetic expression evaluation code now honors the setting of the | |
3853 | `-u' option when expanding variable names. | |
3854 | ||
3855 | x. Fixed the arithmetic evaluation code to allow array subscripts to be | |
3856 | assigned (`let b[7]=42') and auto-incremented and auto-decremented | |
3857 | (e.g., b[7]++). | |
3858 | ||
3859 | y. Reimplemented the existing prompt string date and time expansions using | |
3860 | strftime(3), which changed the output of \@ in some locales. | |
3861 | ||
3862 | z. Fixed a bug that could cause a core dump when a special shell variable | |
3863 | (like RANDOM) was converted to an array with a variable assignment. | |
3864 | ||
3865 | aa. Fixed a bug that would reset the handler for a signal the user had | |
3866 | trapped to a function that would exit the shell when setting the exit | |
3867 | trap in a non-interactive shell. | |
3868 | ||
3869 | bb. Changed the execve(2) wrapper code to check whether or not a failing | |
3870 | command is a directory before looking at whether a `#!' interpreter | |
3871 | failed for some reason. | |
3872 | ||
3873 | cc. Fixed a bug in the command printing code so it no longer inserts a `;' | |
3874 | after a newline, which produces a syntax error when reused as input. | |
3875 | ||
3876 | dd. The code that expands $PS4 no longer inherits the `-x' flag. | |
3877 | ||
3878 | ee. The bash-specific completion functions may now take advantage of the | |
3879 | double-TAB and M-? features of the standard readline completion | |
3880 | functions. | |
3881 | ||
3882 | ff. The mail checking code no longer prints a message if the checked file's | |
3883 | size has not increased, even if the access time is less than the modification time. | |
3884 | ||
3885 | gg. Rewrote the variable symbol table code: there is now a stack of | |
3886 | contexts, each possibly including a separate symbol table; there can | |
3887 | be more than one temporary environment supplied to nested invocations | |
3888 | of `./source'; the temporary environments no longer require so much | |
3889 | special-case code; shell functions now handle the temporary environment | |
3890 | and local variables more consistently; function scope exit is faster now | |
3891 | that the entire symbol table does not have to be traversed to dispose of | |
3892 | local variables; it is now easier to push vars from the temporary | |
3893 | environment to the shell's variable table in posix mode; some duplicated | |
3894 | code has been removed. | |
3895 | ||
3896 | hh. Regularized the error message printing code; builtin_error is now called | |
3897 | more consistently, and common error message strings are handled by small | |
3898 | functions. This should make eventual message translation easier. | |
3899 | ||
3900 | ii. Error messages now include the line number in a script when the shell | |
3901 | is not interactive. | |
3902 | ||
3903 | jj. Array subscript expansion now takes place even when the array variable is | |
3904 | unset, so side effects will take place. | |
3905 | ||
3906 | kk. Fixed a bug in the SICGHLD child-reaping code so that it won't find | |
3907 | jobs already marked as terminated if the OS reuses pids quickly enough. | |
3908 | ||
3909 | ll. Fixed a bug that could cause a signal to not interrupt the `wait' | |
3910 | builtin while it was waiting for a background process to terminate. | |
3911 | ||
3912 | mm. A couple of changes to make it easier for multiple shells to share history | |
3913 | files using `history -n', `history -r', and `history -w'. | |
3914 | ||
3915 | nn. The `getopts' builtin always increments OPTIND to point to the next | |
3916 | option to be handled when an option is returned, whether it's valid | |
3917 | or not, as POSIX 1003.x-2001 requires. | |
3918 | ||
3919 | oo. Changed some parts of the expansion code to avoid allocating and | |
3920 | immediately freeing memory without using the results for anything. | |
3921 | ||
3922 | pp. The shell now keeps track of $IFS internally, updating its internal map | |
3923 | each time the variable is assigned a new value (or at local scope exit). | |
3924 | This saves thousands of hash lookups for IFS, which, while individually | |
3925 | cheap, add up. | |
3926 | ||
3927 | qq. Rewrote the hash table code: searching and insertion are much faster now, | |
3928 | and it uses a better string hashing function; augmented the function | |
3929 | interface to simplify other parts of the code and remove duplicated code | |
3930 | ||
3931 | rr. The shell now uses a simple, generic `object cache' for allocating and | |
3932 | caching words and word lists, which were the major users of | |
3933 | malloc/free. | |
3934 | ||
3935 | ss. Fixed the assignment statement parsing code to allow whitespace and | |
3936 | newlines in subscripts when performing array element assignment. | |
3937 | ||
3938 | tt. The shell now issues many fewer calls to sigprocmask and other signal | |
3939 | masking system calls. | |
3940 | ||
3941 | uu. Fixed the `test' and conditional command file comparison operators to | |
3942 | work right when one file has a non-positive timestamp and the other | |
3943 | does not exist. | |
3944 | ||
3945 | vv. Fixed some cases where the special characters '\001' and '\177' in the | |
3946 | values of variables or positional parameters caused incorrect expansion | |
3947 | results. | |
3948 | ||
3949 | 2. Changes to Readline | |
3950 | ||
3951 | a. Fixed output of comment-begin character when listing variable values. | |
3952 | ||
3953 | b. Added some default key bindings for common escape sequences produced by | |
3954 | HOME and END keys. | |
3955 | ||
3956 | c. Fixed the mark handling code to be more emacs-compatible. | |
3957 | ||
3958 | d. A bug was fixed in the code that prints possible completions to keep it | |
3959 | from printing empty strings in certain circumstances. | |
3960 | ||
3961 | e. Change the key sequence printing code to print ESC as M\- if ESC is a | |
3962 | meta-prefix character -- it's easier for users to understand than \e. | |
3963 | ||
3964 | f. Fixed unstifle_history() to return values that match the documentation. | |
3965 | ||
3966 | g. Fixed the event loop (rl_event_hook) to handle the case where the input | |
3967 | file descriptor is invalidated. | |
3968 | ||
3969 | h. Fixed the prompt display code to work better when the application has a | |
3970 | custom redisplay function. | |
3971 | ||
3972 | i. Changes to make reading and writing the history file a little faster, and | |
3973 | to cope with huge history files without calling abort(3) from xmalloc. | |
3974 | ||
3975 | j. The vi-mode `S' and `s' commands are now undone correctly. | |
3976 | ||
3977 | 3. New Features in Bash | |
3978 | ||
3979 | a. If set, TMOUT is the default timeout for the `read' builtin. | |
3980 | ||
3981 | b. `type' has two new options: `-f' suppresses shell function lookup, and | |
3982 | `-P' forces a $PATH search. | |
3983 | ||
3984 | c. New code to handle multibyte characters. | |
3985 | ||
3986 | d. `select' was changed to be more ksh-compatible, in that the menu is | |
3987 | reprinted each time through the loop only if REPLY is set to NULL. | |
3988 | The previous behavior is available as a compile-time option. | |
3989 | ||
3990 | e. `complete -d' and `complete -o dirnames' now force a slash to be | |
3991 | appended to names which are symlinks to directories. | |
3992 | ||
3993 | f. There is now a bindable edit-and-execute-command readline command, | |
3994 | like the vi-mode `v' command, bound to C-xC-e in emacs mode. | |
3995 | ||
3996 | g. Added support for ksh93-like [:word:] character class in pattern matching. | |
3997 | ||
3998 | h. The $'...' quoting construct now expands \cX to Control-X. | |
3999 | ||
4000 | i. A new \D{...} prompt expansion; passes the `...' to strftime and inserts | |
4001 | the result into the expanded prompt. | |
4002 | ||
4003 | j. The shell now performs arithmetic in the largest integer size the | |
4004 | machine supports (intmax_t), instead of long. | |
4005 | ||
4006 | k. If a numeric argument is supplied to one of the bash globbing completion | |
4007 | functions, a `*' is appended to the word before expansion is attempted. | |
4008 | ||
4009 | l. The bash globbing completion functions now allow completions to be listed | |
4010 | with double tabs or if `show-all-if-ambiguous' is set. | |
4011 | ||
4012 | m. New `-o nospace' option for `complete' and `compgen' builtins; suppresses | |
4013 | readline's appending a space to the completed word. | |
4014 | ||
4015 | n. New `here-string' redirection operator: <<< word. | |
4016 | ||
4017 | o. When displaying variables, function attributes and definitions are shown | |
4018 | separately, allowing them to be re-used as input (attempting to re-use | |
4019 | the old output would result in syntax errors). | |
4020 | ||
4021 | p. There is a new configuration option `--enable-mem-scramble', controls | |
4022 | bash malloc behavior of writing garbage characters into memory at | |
4023 | allocation and free time. | |
4024 | ||
4025 | q. The `complete' and `compgen' builtins now have a new `-s/-A service' | |
4026 | option to complete on names from /etc/services. | |
4027 | ||
4028 | r. `read' has a new `-u fd' option to read from a specified file descriptor. | |
4029 | ||
4030 | s. Fix the completion code so that expansion errors in a directory name | |
4031 | don't cause a longjmp back to the command loop. | |
4032 | ||
4033 | t. Fixed word completion inside command substitution to work a little more | |
4034 | intuitively. | |
4035 | ||
4036 | u. The `printf' %q format specifier now uses $'...' quoting to print the | |
4037 | argument if it contains non-printing characters. | |
4038 | ||
4039 | v. The `declare' and `typeset' builtins have a new `-t' option. When applied | |
4040 | to functions, it causes the DEBUG trap to be inherited by the named | |
4041 | function. Currently has no effect on variables. | |
4042 | ||
4043 | w. The DEBUG trap is now run *before* simple commands, ((...)) commands, | |
4044 | [[...]] conditional commands, and for ((...)) loops. | |
4045 | ||
4046 | x. The expansion of $LINENO inside a shell function is only relative to the | |
4047 | function start if the shell is interactive -- if the shell is running a | |
4048 | script, $LINENO expands to the line number in the script. This is as | |
4049 | POSIX-2001 requires. | |
4050 | ||
4051 | y. The bash debugger in examples/bashdb has been modified to work with the | |
4052 | new DEBUG trap semantics, the command set has been made more gdb-like, | |
4053 | and the changes to $LINENO make debugging functions work better. Code | |
4054 | from Gary Vaughan. | |
4055 | ||
4056 | z. New [n]<&word- and [n]>&word- redirections from ksh93 -- move fds (dup | |
4057 | and close). | |
4058 | ||
4059 | aa. There is a new `-l' invocation option, equivalent to `--login'. | |
4060 | ||
4061 | bb. The `hash' builtin has a new `-l' option to list contents in a reusable | |
4062 | format, and a `-d' option to remove a name from the hash table. | |
4063 | ||
4064 | 4. New Features in Readline | |
4065 | ||
4066 | a. Support for key `subsequences': allows, e.g., ESC and ESC-a to both | |
4067 | be bound to readline functions. Now the arrow keys may be used in vi | |
4068 | insert mode. | |
4069 | ||
4070 | b. When listing completions, and the number of lines displayed is more than | |
4071 | the screen length, readline uses an internal pager to display the results. | |
4072 | This is controlled by the `page-completions' variable (default on). | |
4073 | ||
4074 | c. New code to handle editing and displaying multibyte characters. | |
4075 | ||
4076 | d. The behavior introduced in bash-2.05a of deciding whether or not to | |
4077 | append a slash to a completed name that is a symlink to a directory has | |
4078 | been made optional, controlled by the `mark-symlinked-directories' | |
4079 | variable (default is the 2.05a behavior). | |
4080 | ||
4081 | e. The `insert-comment' command now acts as a toggle if given a numeric | |
4082 | argument: if the first characters on the line don't specify a | |
4083 | comment, insert one; if they do, delete the comment text | |
4084 | ||
4085 | f. New application-settable completion variable: | |
4086 | rl_completion_mark_symlink_dirs, allows an application's completion | |
4087 | function to temporarily override the user's preference for appending | |
4088 | slashes to names which are symlinks to directories. | |
4089 | ||
4090 | g. New function available to application completion functions: | |
4091 | rl_completion_mode, to tell how the completion function was invoked | |
4092 | and decide which argument to supply to rl_complete_internal (to list | |
4093 | completions, etc.). | |
4094 | ||
4095 | h. Readline now has an overwrite mode, toggled by the `overwrite-mode' | |
4096 | bindable command, which could be bound to `Insert'. | |
4097 | ||
4098 | i. New application-settable completion variable: | |
4099 | rl_completion_suppress_append, inhibits appending of | |
4100 | rl_completion_append_character to completed words. | |
4101 | ||
4102 | j. New key bindings when reading an incremental search string: ^W yanks | |
4103 | the currently-matched word out of the current line into the search | |
4104 | string; ^Y yanks the rest of the current line into the search string, | |
4105 | DEL or ^H deletes characters from the search string. | |
4106 | ||
4107 | ------------------------------------------------------------------------------ | |
f73dda09 JA |
4108 | This document details the changes between this version, bash-2.05a-release, |
4109 | and the previous version, bash-2.05a-rc1. | |
4110 | ||
4111 | 1. Changes to Bash | |
4112 | ||
4113 | a. Fixed the `printf' builtin so that the variable name supplied as an | |
4114 | argument to a %n conversion must be a valid shell identifier. | |
4115 | ||
4116 | b. Improved the random number generator slightly. | |
4117 | ||
4118 | c. Changes to configuration to not put -I/usr/include into $CFLAGS, since | |
4119 | it messes up some includes. | |
4120 | ||
4121 | d. Corrected description of POSIXLY_CORRECT in man page and info manual. | |
4122 | ||
4123 | e. Fixed a couple of cases of incorrect function prototypes that sneaked | |
4124 | through and caused compilation problems. | |
4125 | ||
4126 | f. A few changes to avoid potential core dumps in the programmable completion | |
4127 | code. | |
4128 | ||
4129 | g. Fixed a configure problem that could cause a non-existent file to show | |
4130 | up in LIBOBJS. | |
4131 | ||
4132 | h. Fixed a configure problem that could cause siglist.o to not be built when | |
4133 | required. | |
4134 | ||
4135 | i. Changes to the strtoimax and strtoumax replacement functions to work | |
4136 | around buggy compilers. | |
4137 | ||
4138 | j. Fixed a problem with the snprintf replacement function that could | |
4139 | potentially cause a core dump. | |
4140 | ||
4141 | 2. Changes to Readline | |
4142 | ||
4143 | a. Fixed a locale-specific problem in the vi-mode `goto mark' command. | |
4144 | ||
4145 | b. Fixed Makefile to not put -I/usr/include into CFLAGS, since it can cause | |
4146 | include file problems. | |
4147 | ||
4148 | ------------------------------------------------------------------------------ | |
4149 | This document details the changes between this version, bash-2.05a-rc1, | |
4150 | and the previous version, bash-2.05a-beta1. | |
4151 | ||
4152 | 1. Changes to Bash | |
4153 | ||
4154 | a. Fixed the snprintf replacement to correctly implement the `alternate form' | |
4155 | of the %g and %G conversions. | |
4156 | ||
4157 | b. Fixed snprintf to correctly handle the optional precision with the %g and | |
4158 | %G conversions. | |
4159 | ||
4160 | c. Fixed the arithmetic evaluation code to correct the values of `@' and `_' | |
4161 | when translating base-64 constants (they were backwards). | |
4162 | ||
4163 | d. New library functions for formatting long and long long ints. | |
4164 | ||
4165 | e. Fixed a few places where negative array subscripts could have occurred, | |
4166 | mostly as the result of systems using signed characters. | |
4167 | ||
4168 | f. Fixed a few places that assumed a pid_t was no wider than an int. | |
4169 | ||
4170 | g. Fixed the `maildir' mail checking code to work on systems where a | |
4171 | `struct stat' doesn't include an `st_blocks' member. | |
4172 | ||
4173 | h. Fixed snprintf to make `unsigned long long' conversion formats (%llu) | |
4174 | work better. | |
4175 | ||
4176 | i. Fixed snprintf to not print a sign when asked to do an unsigned conversion. | |
4177 | ||
4178 | j. Made configure changes to avoid compiling empty source files in lib/sh. | |
4179 | ||
4180 | k. New replacement functions (if necessary) for strtoull, strtoll, strtoimax, | |
4181 | strtoumax. | |
4182 | ||
4183 | l. The `printf' builtin now handles the `ll' and `j' length modifiers | |
4184 | directly, since they can affect the type and width of the argument | |
4185 | passed to printf(3). | |
4186 | ||
4187 | m. Renamed a number of the bash-specific autoconf macros in aclocal.m4 to | |
4188 | have more sytematic naming, with accompanying changes to configure.in. | |
4189 | ||
4190 | n. Fixed snprintf to handle long doubles and the %a/%A conversions by | |
4191 | falling back to sprintf, as long as sprintf supports them. | |
4192 | ||
4193 | o. Fixed return value from vsnprintf/snprintf to be the number of characters | |
4194 | that would have been printed, even if that number exceeds the buffer | |
4195 | size passed as an argument. | |
4196 | ||
4197 | p. Bash no longer attempts to define its own versions of some ctype macros | |
4198 | if they are implemented as functions in libc but not as macros in | |
4199 | <ctype.h>. | |
4200 | ||
4201 | q. Changed the variable printing code (used by `set', `export', etc.) to | |
4202 | not use the $'...' syntax when in posix mode, since that caused | |
4203 | interoperability problems with other shells (most notably with autoconf). | |
4204 | When not in posix mode, it uses $'...' if the string to be printed | |
4205 | contains non-printing characters and regular single quotes otherwise. | |
4206 | ||
4207 | r. snprintf now recognizes the %F conversion. | |
4208 | ||
4209 | s. Fixed a bug that could cause the wrong status to be returned by a shell | |
4210 | function when the shell is compiled without job control and a null | |
4211 | command containing a command substutition was executed in the function. | |
4212 | ||
4213 | t. When in posix mode, the default value for MAILCHECK is 600. | |
4214 | ||
4215 | u. Bash only initializes FUNCNAME, GROUPS, and DIRSTACK as special variables | |
4216 | if they're not in the initial environment. | |
4217 | ||
4218 | v. If SECONDS appears in the initial environment with a valid integer value, | |
4219 | bash uses that as the starting value, as if an assignment had been | |
4220 | performed. | |
4221 | ||
4222 | w. Bash no longer auto-exports HOME, PATH, SHELL, or TERM, even though it | |
4223 | gives them default values if they don't appear in the initial environment. | |
4224 | ||
4225 | x. Bash no longer auto-exports HOSTNAME, HOSTTYPE, MACHTYPE, or OSTYPE, | |
4226 | even if it assigns them default values. | |
4227 | ||
4228 | y. Bash no longer removes the export attribute from SSH_CLIENT or SSH2_CLIENT | |
4229 | if they appear in the initial environment. | |
4230 | ||
4231 | z. Bash no longer attempts to discover if it's being run by sshd in order to | |
4232 | run the startup files. If the SSH_SOURCE_BASHRC is uncommented in | |
4233 | config-top.h it will attempt to do so as previously, but that's commented | |
4234 | out in the distributed version. | |
4235 | ||
4236 | aa. Fixed a typo in the code that tests for LC_NUMERIC. | |
4237 | ||
4238 | bb. The POSIXLY_CORRECT shell variable and its effects are now documented. | |
4239 | ||
4240 | cc. Some changes to several of the support shell scripts included in the | |
4241 | definitions to try to avoid race conditions and attacks. | |
4242 | ||
4243 | dd. Several changes to avoid warnings from `gcc -Wall'. | |
4244 | ||
4245 | ee. Fixed a problem with the `unset' builtin that could cause incorrect | |
4246 | results if asked to unset a variable and an array subscript in the | |
4247 | same command. | |
4248 | ||
4249 | ff. A few changes to the shell's temporary file creation code to avoid | |
4250 | potential file descriptor leaks and to prefer the system's idea of | |
4251 | the temporary directory to use. | |
4252 | ||
4253 | gg. Fixes to build with the C alloca in lib/malloc/alloca.c if the system | |
4254 | requires it but the shell has been configured --without-bash-malloc. | |
4255 | ||
4256 | hh. Updated the documentation to note that only interactive shells resend | |
4257 | SIGHUP to all jobs before exiting. | |
4258 | ||
4259 | ii. Fixes to only pass unquoted tilde words to tilde_expand, rather than | |
4260 | rely on tilde_expand or getpwnam(3) to handle the quotes (MacOS 10.x | |
4261 | will remove backslashes in any login name passed to getpwnam(3)). | |
4262 | ||
4263 | jj. Small change from Paul Eggert to make LINENO right in commands run with | |
4264 | `bash -c'. | |
4265 | ||
4266 | 2. New Features in Bash | |
4267 | ||
4268 | a. The `printf' builtin now handles the %a and %A conversions if they're | |
4269 | implemented by printf(3). | |
4270 | ||
4271 | b. The `printf' builtin now handles the %F conversion (just about like %f). | |
4272 | ||
4273 | c. The `printf' builtin now handles the %n conversion like printf(3). The | |
4274 | corresponding argument is the name of a shell variable to which the | |
4275 | value is assigned. | |
4276 | ||
4277 | 3. Changes to Readline | |
4278 | ||
4279 | a. Fixed a few places where negative array subscripts could have occurred. | |
4280 | ||
4281 | b. Fixed the vi-mode code to use a better method to determine the bounds of | |
4282 | the array used to hold the marks. | |
4283 | ||
4284 | c. Fixed the defines in chardefs.h to work better when chars are signed. | |
4285 | ||
4286 | d. Fixed configure.in to use the new names for bash autoconf macros. | |
4287 | ||
4288 | e. Readline no longer attempts to define its own versions of some ctype | |
4289 | macros if they are implemented as functions in libc but not as macros in | |
4290 | <ctype.h>. | |
4291 | ||
4292 | f. Fixed a problem where rl_backward could possibly set point to before | |
4293 | the beginning of the line. | |
4294 | ||
4295 | ------------------------------------------------------------------------------ | |
4296 | This document details the changes between this version, bash-2.05a-beta1, | |
4297 | and the previous version, bash-2.05a-alpha1. | |
4298 | ||
4299 | 1. Changes to Bash | |
4300 | ||
4301 | a. Fixed a bug in the evalution of arithmetic `for' statements when the | |
4302 | expanded expression is NULL. | |
4303 | ||
4304 | b. Fixed an unassigned variable problem in the redirection printing code. | |
4305 | ||
4306 | c. Added more prototypes to extern function declarations in the header | |
4307 | files and to static function declarations in C source files. | |
4308 | ||
4309 | d. Make sure called functions have a prototype in scope, to get the arguments | |
4310 | and return values right instead of casting. Removed extern function | |
4311 | declarations from C source files that were already included in header | |
4312 | files. | |
4313 | ||
4314 | e. Changed some function arguments to use function typedefs in general.h so | |
4315 | the prototypes can be checked. The only use of Function and VFunction | |
4316 | now is for unwind-protects. | |
4317 | ||
4318 | f. More const changes to function arguments and appropriate variables. | |
4319 | ||
4320 | g. Changed the mail checking support to handle `maildir'-style mail | |
4321 | directories. | |
4322 | ||
4323 | h. Augmented the bash malloc to pass in the file and line number information | |
4324 | for each malloc, realloc, and free. This should result in better error | |
4325 | messages. | |
4326 | ||
4327 | i. The `old' gnu malloc is no longer a configuration option. | |
4328 | ||
4329 | j. Augmented the bash malloc with optional tracing and registering allocated | |
4330 | and freed memory. | |
4331 | ||
4332 | k. Prompt string decoding now saves and restores the value of $? when it | |
4333 | expands the prompt string, so command substitutions don't change $?. | |
4334 | ||
4335 | i. Array indices are now `long', since shell arithmetic is performed as long, | |
4336 | and the internal arrayind_t type is used consistently. | |
4337 | ||
4338 | j. Some more `unsigned char *' fixes from Paul Eggert. | |
4339 | ||
4340 | k. Fixed a bad call to builtin_error that could cause core dumps when making | |
4341 | local variables. | |
4342 | ||
4343 | l. `return' may no longer be used to terminate a `select' command, for | |
4344 | compatibility with ksh. | |
4345 | ||
4346 | m. Changed code that reads octal numbers to do a better job of detecting | |
4347 | overflows. | |
4348 | ||
4349 | n. The time formatting code no longer uses absolute indices into a buffer, | |
4350 | because the buffer size changes depending on the size of a `time_t'. | |
4351 | ||
4352 | o. `umask' now prints four digits when printing in octal mode, for | |
4353 | compatibility with other shells. | |
4354 | ||
4355 | p. Lots of changes to the `printf' builtin from Paul Eggert: it handles `L' | |
4356 | formats and long doubles better, and internal functions have been | |
4357 | simpified where appropriate. | |
4358 | ||
4359 | q. Some `time_t' fixes for machines were a time_t is bigger than a long. | |
4360 | ||
4361 | r. Replaced some bash-specific autoconf macros with standard equivalents. | |
4362 | ||
4363 | s. Improvmed the code that constructs temporary filenames to make the | |
4364 | generated names a bit more random. | |
4365 | ||
4366 | t. Added code that checks for ascii before calling any of the is* ctype | |
4367 | functions. | |
4368 | ||
4369 | u. Changed some places where a `char' was used as an array subscript to use | |
4370 | `unsigned char', since a `char' can be negative if it's signed by default. | |
4371 | ||
4372 | v. Lots of changes to the `ulimit' builtin from Paul Eggert to add support | |
4373 | for the new POSIX-200x RLIM_SAVED_CUR and RLIM_SAVED_MAX values and | |
4374 | simplify the code. | |
4375 | ||
4376 | w. `ulimit' now prints the description of a resource in any error message | |
4377 | relating to fetching or setting that resource's limits. | |
4378 | ||
4379 | x. The `snprintf' replacement now computes maximum values at compile | |
4380 | time rather than using huge constants for things like long long. | |
4381 | ||
4382 | y. Interactive shells now ignore `set -n'. | |
4383 | ||
4384 | z. Changed the malloc bookkeeping information so that it's now 8 bytes | |
4385 | instead of 12 on most 32-bit machines (saving 4 bytes per allocation), | |
4386 | restoring 8-byte alignment. | |
4387 | ||
4388 | aa. The malloc error reporting code now attempts to print the file and line | |
4389 | number of the call that caused the error. | |
4390 | ||
4391 | bb. Changed the redirection error reporting code to catch EBADF errors and | |
4392 | report the file descriptor number rather than the file being redirected | |
4393 | to or from (e.g., things like `exec 4242<x' where 4242 is an out-of-range | |
4394 | file descriptor). | |
4395 | ||
4396 | cc. `printf', `echo -e', and the $'...' code now process only two hex digits | |
4397 | after a `\x' escape sequence for compatibility with other shells, and | |
4398 | the documentation was changed to note that the octal and hex escape | |
4399 | sequences result in an eight-bit value rather than strict ASCII. | |
4400 | ||
4401 | 2. Changes to Readline | |
4402 | ||
4403 | a. The completion code now attempts to do a better job of preserving the | |
4404 | case of the word the user typed if ignoring case in completions. | |
4405 | ||
4406 | b. Readline defaults to not echoing the input and lets the terminal | |
4407 | initialization code enable echoing if there is a controlling terminal. | |
4408 | ||
4409 | c. The key binding code now processes only two hex digits after a `\x' | |
4410 | escape sequence, and the documentation was changed to note that the | |
4411 | octal and hex escape sequences result in an eight-bit value rather | |
4412 | than strict ASCII. | |
4413 | ||
4414 | 3. New Features in Bash | |
4415 | ||
4416 | a. The builtin `ulimit' now takes two new non-numeric arguments: `hard', | |
4417 | meaning the current hard limit, and `soft', meaning the current soft | |
4418 | limit, in addition to `unlimited' | |
4419 | ||
4420 | b. `ulimit' now prints the option letter associated with a particular | |
4421 | resource when printing more than one limit. | |
4422 | ||
4423 | c. `ulimit' prints `hard' or `soft' when a value is not `unlimited' but is | |
4424 | one of RLIM_SAVED_MAX or RLIM_SAVED_CUR, respectively. | |
4425 | ||
4426 | 4. New Features in Readline | |
4427 | ||
4428 | a. New bindable variable `history-preserve-point'. If set, the history | |
4429 | code attempts to place the user at the same location on each history | |
4430 | line retrived with previous-history or next-history. | |
4431 | ||
4432 | ------------------------------------------------------------------------------ | |
4433 | This document details the changes between this version, bash-2.05a-alpha1, | |
4434 | and the previous version, bash-2.05-release. | |
4435 | ||
4436 | 1. Changes to Bash | |
4437 | ||
4438 | a. Better checks in the redirection code for write errors. | |
4439 | ||
4440 | b. bashbug now uses $TMPDIR, defaulting to /tmp, and uses mktemp(1) more | |
4441 | portably. | |
4442 | ||
4443 | c. System-specific configuration changes for: Interix, OpenBSD, FreeBSD, | |
4444 | MacOS X. | |
4445 | ||
4446 | d. Some more `const' cleanups through the code. | |
4447 | ||
4448 | e. Fixed a typo in the /dev/fd redirection code, better checks for valid | |
4449 | numeric fds in /dev/fd. | |
4450 | ||
4451 | f. Fixed many parts of the shell to handle integer overflow more gracefully | |
4452 | and to do more stringent checks for valid numbers. | |
4453 | ||
4454 | g. Fixed mksignames to include config.h. | |
4455 | ||
4456 | h. Fixed an uninitialized variable problem that could cause the shell to core | |
4457 | dump when replacing characters in a string. | |
4458 | ||
4459 | i. New mechanism for updating the patch level when official patches are | |
4460 | released (patchlevel.h). | |
4461 | ||
4462 | j. configure.in changed to no longer require external files _distribution and | |
4463 | _patchlevel. | |
4464 | ||
4465 | k. Fixed non-interactive shell initialization problem when bash started as | |
4466 | `bash -i filename'. | |
4467 | ||
4468 | l. Fixed printf builtin conversion error handling to be POSIX.2-conformant. | |
4469 | ||
4470 | m. autoconf-2.52 is now used to build configure; autoconf-2.50 or newer is | |
4471 | required. Some of the bash-specific macros were removed, since they are | |
4472 | now standard. | |
4473 | ||
4474 | n. Startup files and files read with source or `.' are no longer required to | |
4475 | be regular files. | |
4476 | ||
4477 | o. Fixed core dump in builtin printf when user-supplied precision or field | |
4478 | width is 0. | |
4479 | ||
4480 | p. Fixed builtin printf to treat a negative field width as a positive field | |
4481 | width with left-justification. | |
4482 | ||
4483 | r. New unwind-protect implementation from Paul Eggert. | |
4484 | ||
4485 | s. Fixed an inadvertently-unclosed comment in the bash completion code that | |
4486 | caused programmable completions to not add trailing slashes or spaces to | |
4487 | completions. | |
4488 | ||
4489 | t. Fixed the process substitution code to cope better when stdin is closed. | |
4490 | ||
4491 | v. Fixes, mostly from Paul Eggert, for a few possible buffer overflows in | |
4492 | the shell. | |
4493 | ||
4494 | w. Fixes from Paul Eggert to avoid most of the type casts in the shell code, | |
4495 | and use more appropriate types for a number of variables. | |
4496 | ||
4497 | x. Command substition no longer inherits the DEBUG trap. | |
4498 | ||
4499 | y. Some fixes to the process substition code on machines without /dev/fd so | |
4500 | that named pipes are not removed inappropriately. | |
4501 | ||
4502 | z. The loadable `getconf' builtin is now much more complete, and will become | |
4503 | part of the shell in the future. | |
4504 | ||
4505 | aa. The select command no longer terminates on a `return', so it can be used | |
4506 | to return from an enclosing function (as ksh does it). | |
4507 | ||
4508 | bb. Fixed the extended pattern matching code to behave better when presented | |
4509 | with incorrectly-formed patterns. | |
4510 | ||
4511 | cc. Some changes were made with the intent of making cross-compilation easier. | |
4512 | ||
4513 | dd. The network code (/dev/tcp and /dev/udp redirections) uses getaddrinfo(3) | |
4514 | if it's available, which adds support for IPv6. | |
4515 | ||
4516 | ee. Subshells of login shells no longer source ~/.bash_logout when they exit. | |
4517 | ||
4518 | ff. Fixes so that subshells don't exit inappropriately if the -e option has | |
4519 | been set. | |
4520 | ||
4521 | gg. Restricted shells no longer allow functions to be exported. | |
4522 | ||
4523 | hh. Changes to the pattern matching code so extended pattern matching works | |
4524 | on systems with deficient shared library implementations, like MacOS X. | |
4525 | ||
4526 | ii. Better error messages when a script with a leading `#!interp' fails | |
4527 | to execute because of problems with `interp'. | |
4528 | ||
4529 | jj. Fixed `compgen' to handle the `-o default' option better. | |
4530 | ||
4531 | kk. Fixed the job control code to force an asynchronous process's standard | |
4532 | input to /dev/null only if job control is not active. | |
4533 | ||
4534 | ll. Fixed a possible infinite recursion problem when `fc ""=abc' (a null | |
4535 | pattern) is used to re-execute a previous command. | |
4536 | ||
4537 | mm. Fixed `declare [-a] var=value' to assign VALUE to element 0 if VAR is an | |
4538 | array variable. Similarly for `declare [-a] var[N]=value'. This is like | |
4539 | ksh93. | |
4540 | ||
4541 | nn. Fixed a bug that caused `read -a aname' to work even if ANAME had been | |
4542 | declared readonly. | |
4543 | ||
4544 | oo. Fixed a possible integer overflow problem when constructing names for | |
4545 | temporary files. | |
4546 | ||
4547 | 2. New Features in Bash | |
4548 | ||
4549 | a. Added support for DESTDIR installation root prefix, so you can do a | |
4550 | `make install DESTDIR=bash-root' and do easier binary packaging. | |
4551 | ||
4552 | b. Added support for builtin printf "'" flag character as per latest POSIX | |
4553 | drafts. | |
4554 | ||
4555 | c. Support for POSIX.2 printf(1) length specifiers `j', `t', and `z' (from | |
4556 | ISO C99). | |
4557 | ||
4558 | d. New autoconf macro, RL_LIB_READLINE_VERSION, for use by other applications | |
4559 | (bash doesn't use very much of what it returns). | |
4560 | ||
4561 | e. `set [-+]o nolog' is recognized as required by the latest POSIX drafts, | |
4562 | but ignored. | |
4563 | ||
4564 | f. New read-only `shopt' option: login_shell. Set to non-zero value if the | |
4565 | shell is a login shell. | |
4566 | ||
4567 | g. New `\A' prompt string escape sequence; expands to time in 24 HH:MM format. | |
4568 | ||
4569 | h. New `-A group/-g' option to complete and compgen; does group name | |
4570 | completion. | |
4571 | ||
4572 | i. New `-t' option to `hash' to list hash values for each filename argument. | |
4573 | ||
4574 | j. New [-+]O invocation option to set and unset `shopt' options at startup. | |
4575 | ||
4576 | k. configure's `--with-installed-readline' option now takes an optional | |
4577 | `=PATH' suffix to set the root of the tree where readline is installed | |
4578 | to PATH. | |
4579 | ||
4580 | l. The ksh-like `ERR' trap has been added. The `ERR' trap will be run | |
4581 | whenever the shell would have exited if the -e option were enabled. | |
4582 | It is not inherited by shell functions. | |
4583 | ||
4584 | m. `readonly', `export', and `declare' now print variables which have been | |
4585 | given attributes but not set by assigning a value as just a command and | |
4586 | a variable name (like `export foo') when listing, as the latest POSIX | |
4587 | drafts require. | |
4588 | ||
4589 | n. `bashbug' now requires that the subject be changed from the default. | |
4590 | ||
4591 | o. configure has a new `--enable-largefile' option, like other GNU utilities. | |
4592 | ||
4593 | p. `for' loops now allow empty word lists after `in', like the latest POSIX | |
4594 | drafts require. | |
4595 | ||
4596 | 3. Changes to Readline | |
4597 | ||
4598 | a. More `const' and type casting fixes. | |
4599 | ||
4600 | b. Changed rl_message() to use vsnprintf(3) (if available) to fix buffer | |
4601 | overflow problems. | |
4602 | ||
4603 | c. The completion code no longer appends a `/' or ` ' to a match when | |
4604 | completing a symbolic link that resolves to a directory name, unless | |
4605 | the match does not add anything to the word being completed. This | |
4606 | means that a tab will complete the word up to the full name, but not | |
4607 | add anything, and a subsequent tab will add a slash. | |
4608 | ||
4609 | d. Fixed a trivial typo that made the vi-mode `dT' command not work. | |
4610 | ||
4611 | e. Fixed the tty code so that ^S and ^Q can be inserted with rl_quoted_insert. | |
4612 | ||
4613 | f. Fixed the tty code so that ^V works more than once. | |
4614 | ||
4615 | g. Changed the use of __P((...)) for function prototypes to PARAMS((...)) | |
4616 | because the use of __P in typedefs conflicted g++ and glibc. | |
4617 | ||
4618 | 4. New Features in Readline | |
4619 | ||
4620 | a. Added extern declaration for rl_get_termcap to readline.h, making it a | |
4621 | public function (it was always there, just not in readline.h). | |
4622 | ||
4623 | b. New #defines in readline.h: RL_READLINE_VERSION, currently 0x0402, | |
4624 | RL_VERSION_MAJOR, currently 4, and RL_VERSION_MINOR, currently 2. | |
4625 | ||
4626 | c. New readline variable: rl_readline_version, mirrors RL_READLINE_VERSION. | |
4627 | ||
4628 | d. New bindable boolean readline variable: match-hidden-files. Controls | |
4629 | completion of files beginning with a `.' (on Unix). Enabled by default. | |
4630 | ||
4631 | e. The history expansion code now allows any character to terminate a | |
4632 | `:first-' modifier, like csh. | |
4633 | ||
4634 | f. The incremental search code remembers the last search string and uses | |
4635 | it if ^R^R is typed without a search string. | |
4636 | ||
4637 | ------------------------------------------------------------------------------ | |
28ef6c31 JA |
4638 | This document details the changes between this version, bash-2.05-release, |
4639 | and the previous version, bash-2.05-beta2. | |
4640 | ||
4641 | 1. Changes to Bash | |
4642 | ||
4643 | a. Make sure we note that the first line of a multi-line command was not | |
4644 | saved in the history if the tests for HISTCONTROL succeed, but the | |
4645 | HISTIGNORE check fails. | |
4646 | ||
4647 | b. Fixed a bug in the pattern matching code that caused `[' to be treated | |
4648 | as a special character inside a `[...]' bracket expression. | |
4649 | ||
4650 | c. Fixed a bug in the pattern matching code that caused `]' to terminate | |
4651 | a bracket expression even if it was the first character after the `[' | |
4652 | (or a leading `!' or `^'). | |
4653 | ||
4654 | d. Made a small change to report a more user-friendly error message if | |
4655 | execve(2) fails because of an error with the interpreter in a script | |
4656 | with a leading `#! interpreter'. | |
4657 | ||
4658 | e. If the OS does not support an exec(2) magic number of `#!', make sure we | |
4659 | have a non-null interpreter name before attempting to execute it. | |
4660 | ||
4661 | f. Fixed a bug that caused the shell process to end up in a different | |
4662 | process group than the controlling terminal if a job-control shell was | |
4663 | run with `exec' in the startup files. | |
4664 | ||
4665 | g. When started in POSIX mode, either by `bash --posix', `bash -o posix', or | |
4666 | `sh', $SHELLOPTS includes `posix' and POSIXLY_CORRECT is set. | |
4667 | ||
4668 | h. Fixed a problem that caused the `\W' prompt string escape sequence to | |
4669 | expand to nothing when $PWD was `//'. | |
4670 | ||
4671 | i. The `bashbug' shell script no longer uses $(...) command substitution. | |
4672 | ||
4673 | j. When `set' is invoked without options in POSIX mode, it no longer prints | |
4674 | the names and definitions of shell functions. | |
4675 | ||
4676 | 2. Changes to Readline | |
4677 | ||
4678 | a. rl_set_paren_blink_timeout() is now documented. | |
4679 | ||
4680 | b. Corrected history.3 man page: `$' is not in the default value of | |
4681 | history_word_delimiters. | |
4682 | ||
4683 | c. If a hook function assigned to rl_event_hook sets rl_done to a non-zero | |
4684 | value, rl_read_key() now immediately returns '\n' (which is assumed to | |
4685 | be bound to accept-line). | |
4686 | ||
4687 | 3. New Features in Bash | |
4688 | ||
4689 | a. The `>&word' redirection now works in POSIX mode as it does by default, | |
4690 | since POSIX.2 leaves it unspecified. | |
4691 | ||
4692 | ------------------------------------------------------------------------------ | |
4693 | This document details the changes between this version, bash-2.05-beta2, | |
4694 | and the previous version, bash-2.05-beta1. | |
4695 | ||
4696 | 1. Changes to Bash | |
4697 | ||
4698 | a. Fixed a bug in the arithmetic evaluation code so that a^=b is supported. | |
4699 | ||
4700 | b. Fixed startup so posixly_correct is retained across subshells begun to | |
4701 | execute scripts without a leading `#!'. | |
4702 | ||
4703 | c. Fixed a bug that caused $(< file) to not work in a (...) subshell. | |
4704 | ||
4705 | d. Added config support for Linux running on the IBM S390. | |
4706 | ||
4707 | e. Fixed a bug that caused bash to get its input pointer out of sync when | |
4708 | reading commands through a pipe and running a command with standard | |
4709 | input redirected from a file. | |
4710 | ||
4711 | f. Made a change so that command completion now makes about half as many | |
4712 | stat(2) calls when searching the $PATH. | |
4713 | ||
4714 | g. Fixed a bug that caused variable assignments preceding `return' to not | |
4715 | be propagated to the shell environment in POSIX mode. | |
4716 | ||
4717 | h. Fixed a bug with ${parameter[:]?word} -- tilde expansion was not performed | |
4718 | on `word'. | |
4719 | ||
4720 | i. In POSIX mode, `break' and `continue' do not complain and return success | |
4721 | if called when the shell is not executing a loop. | |
4722 | ||
4723 | j. Fixed `bash -o posix' to work the same as `bash --posix'. | |
4724 | ||
4725 | k. Fixed a bug where variable assignments preceding `eval' or `source/.' | |
4726 | would not show up in the environment exported to subshells run by the | |
4727 | commands. | |
4728 | ||
4729 | l. In POSIX mode, shells started to execute command substitutions inherit | |
4730 | the value of the `-e' option from their parent shell. | |
4731 | ||
4732 | m. In POSIX mode, aliases are expanded even in non-interactive shells. | |
4733 | ||
4734 | n. Changed some of the job control messages to display the text required by | |
4735 | POSIX.2 when the shell is in POSIX mode. | |
4736 | ||
4737 | o. Fixed a bug in `test' that caused it to occasionally return incorrect | |
4738 | results when non-numeric arguments were supplied to `-t'. | |
4739 | ||
4740 | 2. Changes to Readline | |
4741 | ||
4742 | a. Some changes were made to avoid gcc warnings with -Wall. | |
4743 | ||
4744 | b. rl_get_keymap_by_name now finds keymaps case-insensitively, so | |
4745 | `set keymap EMACS' works. | |
4746 | ||
4747 | c. The history file writing and truncation functions now return a useful | |
4748 | status on error. | |
4749 | ||
4750 | d. Fixed a bug that could cause applications to dereference a NULL pointer | |
4751 | if a NULL second argument was passed to history_expand(). | |
4752 | ||
4753 | 3. New Features in Bash | |
4754 | ||
4755 | a. doc/readline.3 has been moved to the readline distribution. | |
4756 | ||
4757 | 4. New Features in Readline | |
4758 | ||
4759 | a. New function, rl_get_screen_size (int *rows, int *columns), returns | |
4760 | readline's idea of the screen dimensions. | |
4761 | ||
4762 | b. The timeout in rl_gather_tyi (readline keyboard input polling function) | |
4763 | is now settable via a function (rl_set_keyboard_input_timeout()). | |
4764 | ||
4765 | c. Renamed the max_input_history variable to history_max_entries; the old | |
4766 | variable is maintained for backwards compatibility. | |
4767 | ||
4768 | d. The list of characters that separate words for the history tokenizer is | |
4769 | now settable with a variable: history_word_delimiters. The default | |
4770 | value is as before. | |
4771 | ||
4772 | ------------------------------------------------------------------------------ | |
4773 | This document details the changes between this version, bash-2.05-beta1, | |
4774 | and the previous version, bash-2.05-alpha1. | |
4775 | ||
4776 | 1. Changes to Bash | |
4777 | ||
4778 | a. Changes to allow shared library and object building on the GNU Hurd. | |
4779 | ||
4780 | b. Fixes to the way exported functions are placed into the environment and | |
4781 | cached. | |
4782 | ||
4783 | c. The globbing library once again respects locales when processing ranges | |
4784 | in bracket expressions while doing pattern matching. | |
4785 | ||
4786 | d. System-specific configuration changes for: Tru 64, Interix | |
4787 | ||
4788 | e. Bashbug now uses /usr/bin/editor as one of the editing alternatives, and | |
4789 | will use mktemp(1) or tempfile(1), if present, for temporary file creation. | |
4790 | ||
4791 | f. Bash no longer performs a binary file check on a script argument that's | |
4792 | really a tty (like /dev/fd/0 or /dev/stdin). | |
4793 | ||
4794 | g. Fixed a bug in the execution of shell scripts that caused the effects of | |
4795 | $BASH_ENV to be undone in some cases. | |
4796 | ||
4797 | h. Fixed several bugs that made `bash [-i] /dev/stdin' not work correctly. | |
4798 | ||
4799 | i. Several changes to the job control code to avoid some signal state | |
4800 | manipulation. | |
4801 | ||
4802 | j. The Bash malloc no longer blocks signals as often, which should make it | |
4803 | faster. | |
4804 | ||
4805 | k. Fixed a parsing bug that did not allow backslash to escape a single quote | |
4806 | inside a $'...' construct. | |
4807 | ||
4808 | l. Fixed a bug that caused things like ${var:=$'value'} to be parsed | |
4809 | incorrectly. This showed up in newer versions of autoconf. | |
4810 | ||
4811 | m. Fixed a bug in the bash-specific readline initialization that caused | |
4812 | key bindings to bash-specific function names appearing in .inputrc to | |
4813 | not be honored. | |
4814 | ||
4815 | n. Bash now sets the file descriptor it uses to save the file descriptor | |
4816 | opened on a shell script to close on exec. | |
4817 | ||
4818 | o. Fixed a bug in the prompt string decoding that caused it to misbehave | |
4819 | when presented an octal sequence of fewer than three characters. | |
4820 | ||
4821 | p. Fixed the `test' builtin to return an error if `[' is supplied a single | |
4822 | argument that is not `]'. | |
4823 | ||
4824 | q. Fixed a bug that caused subshells started to run executable shell scripts | |
4825 | without a leading `#!' to incorrectly inherit an argument list preceding | |
4826 | a shell builtin (like such a script called from a script sourced with `.', | |
4827 | where there were variable assignments preceding the `.' command) | |
4828 | ||
4829 | r. Fixed a bug that caused changes to variables supplied in an assignment | |
4830 | statement preceding a shell builtin to not be honored (like a script | |
4831 | run with `.'). | |
4832 | ||
4833 | s. HOSTTYPE, OSTYPE, and MACHTYPE are set only if they do not have values | |
4834 | when the shell is started. | |
4835 | ||
4836 | t. Fixed a bug that caused SIGINT to kill shell scripts after the script | |
4837 | called `wait'. | |
4838 | ||
4839 | u. The `fc' builtin now tries to create its temporary files in the directory | |
4840 | named by $TMPDIR. | |
4841 | ||
4842 | v. Bash no longer calls any Readline functions or uses any Readline variables | |
4843 | not declared in readline.h. | |
4844 | ||
4845 | w. Fixed a bug that caused some substitutions involving $@ to not be split | |
4846 | correctly, especially expansions of the form ${paramterOPword}. | |
4847 | ||
4848 | x. SSH2_CLIENT is now treated like SSH_CLIENT and not auto-exported if it | |
4849 | appears in the initial environment. | |
4850 | ||
4851 | y. Fixed a couple of problems with shell scripts without a leading `#!' | |
4852 | being executed out of shell functions that could cause core dumps if | |
4853 | such a script attempted to execute `return'. | |
4854 | ||
4855 | z. Fixed a problem with the `-nt' and `-ot' binary operators for the | |
4856 | `test/[' builtin and the `[[' conditional command that caused wrong | |
4857 | return values if one of the file arguments did not exist. | |
4858 | ||
4859 | aa. Fixed a bug that caused non-interactive shells which had previously | |
4860 | executed `shopt -s expand_aliases' to fail to expand aliases in a | |
4861 | command like `(command) &'. | |
4862 | ||
4863 | 2. Changes to Readline | |
4864 | ||
4865 | a. Changes to make most (but not yet all -- there is still crlf()) of the | |
4866 | exported readline functions declared in readline.h have an rl_ prefix. | |
4867 | ||
4868 | b. More `const' changes in function arguments, mostly for completion | |
4869 | functions. | |
4870 | ||
4871 | c. Fixed a bug in rl_forward that could cause the point to be set to before | |
4872 | the beginning of the line in vi mode. | |
4873 | ||
4874 | d. Fixed a bug in the callback read-char interface to make it work when a | |
4875 | readline function pushes some input onto the input stream with | |
4876 | rl_execute_next (like the incremental search functions). | |
4877 | ||
4878 | e. Fixed a file descriptor leak in the history file manipulation code that | |
4879 | was tripped when attempting to truncate a non-regular file (like | |
4880 | /dev/null). | |
4881 | ||
4882 | f. Some existing variables are now documented and part of the public | |
4883 | interface (declared in readline.h): rl_explict_arg, rl_numeric_arg, | |
4884 | rl_editing_mode, rl_last_func. | |
4885 | ||
4886 | g. Renamed rltty_set_default_bindings to rl_tty_set_default_bindings and | |
4887 | crlf to rl_crlf, so there are no public functions declared in readline.h | |
4888 | without an `rl_' prefix. The old functions still exist for backwards | |
4889 | compatibility. | |
4890 | ||
4891 | 3. New Features in Bash | |
4892 | ||
4893 | a. A new loadable builtin, realpath, which canonicalizes and expands symlinks | |
4894 | in pathname arguments. | |
4895 | ||
4896 | b. When `set' is called without options, it prints function defintions in a | |
4897 | way that allows them to be reused as input. This affects `declare' and | |
4898 | `declare -p' as well. | |
4899 | ||
4900 | 4. New Features in Readline | |
4901 | ||
4902 | a. New application-callable function rl_set_prompt(const char *prompt): | |
4903 | expands its prompt string argument and sets rl_prompt to the result. | |
4904 | ||
4905 | b. New application-callable function rl_set_screen_size(int rows, int cols): | |
4906 | public method for applications to set readline's idea of the screen | |
4907 | dimensions. | |
4908 | ||
4909 | c. The history example program (examples/histexamp.c) is now built as one | |
4910 | of the examples. | |
4911 | ||
4912 | ------------------------------------------------------------------------------ | |
4913 | This document details the changes between this version, bash-2.05-alpha1, | |
4914 | and the previous version, bash-2.04-release. | |
4915 | ||
4916 | 1. Changes to Bash | |
4917 | ||
4918 | a. A fix was made to allow newlines in compond array assignments. | |
4919 | ||
4920 | b. configure now checks for real-time signals with unusable values. | |
4921 | ||
4922 | c. Interactive shells no longer exit if a substitution fails because of an | |
4923 | unset variable within a sourced file. | |
4924 | ||
4925 | d. Fixed a problem with incorrect matching of extended glob patterns when | |
4926 | doing pattern substitution. | |
4927 | ||
4928 | e. `{' is now quoted by the completion code when it appears in a filename. | |
4929 | ||
4930 | f. Fixed an error in pattern matching that caused the matcher to not | |
4931 | correctly skip the rest of a bracket expression after a character | |
4932 | matched. | |
4933 | ||
4934 | g. Fixed a bug in the IFS word splitting code to make a non-whitespace IFS | |
4935 | character preceded by IFS whitespace part of the current delimiter rather | |
4936 | than generating a separate field. | |
4937 | ||
4938 | h. The {!prefix@} expansion now generates separate words, analogous to $@, | |
4939 | when double-quoted. | |
4940 | ||
4941 | i. Command substitution now ignores NUL bytes in the command output, and the | |
4942 | parser ignores them on input. | |
4943 | ||
4944 | j. A fix was made to the job control code to prevent hanging processes when | |
4945 | the shell thinks background processes are running but the kernel returns | |
4946 | -1/ECHILD from waitpid(). | |
4947 | ||
4948 | k. `pwd' now prints an error message if the write fails when displaying the | |
4949 | current directory. | |
4950 | ||
4951 | l. When in POSIX mode, the shell prints trap dispostions without a leading | |
4952 | `SIG' in the signal specification. | |
4953 | ||
4954 | m. Fixed a parser bug that caused the current command's line count to be | |
4955 | messed up by a compound array assignment. | |
4956 | ||
4957 | n. Fixed a bug in the unwind-protect code that caused bad behavior on machines | |
4958 | where ints and pointers are not the same size. | |
4959 | ||
4960 | o. System-specific configure changes for: MacOS X. | |
4961 | ||
4962 | p. Changes for Cygwin to translate \r\n and \r to \n and to set file | |
4963 | descriptors used for reading input to text mode in various places. | |
4964 | ||
4965 | q. Fixed a bug that caused `!' to occasionally not be honored when in | |
4966 | a (...) subshell. | |
4967 | ||
4968 | r. Bash no longer assumes that getcwd() will return any useful error message | |
4969 | in the buffer passed as an argument if the call fails. | |
4970 | ||
4971 | s. The `source', `.', and `fc' builtins no longer check whether a file is | |
4972 | binary before reading commands from it. | |
4973 | ||
4974 | t. Subshells no longer turn off job control when they exit, since that | |
4975 | sometimes resulted in the terminal being reset to the wrong process | |
4976 | group. | |
4977 | ||
4978 | u. The history code no longer tries to save the second and subsequent lines | |
4979 | of a multi-line command if the first line was not saved. | |
4980 | ||
4981 | v. The history saving code now does a better job of saving blank lines in a | |
4982 | multi-line command. | |
4983 | ||
4984 | w. Removed a `feature' that made `ulimit' silently translate `unlimited' to | |
4985 | the current hard limit, which obscured some kernel error returns. | |
4986 | ||
4987 | x. Fixed the grammar so that `}' is recognized as a reserved word after | |
4988 | another reserved word, rather than requiring a `;' or newline. This | |
4989 | means that constructs like | |
4990 | ||
4991 | { { echo a b c ; } } | |
4992 | ||
4993 | work as expected. | |
4994 | ||
4995 | y. Conditional commands ([[...]]) now perform tilde expansion on their | |
4996 | arguments. | |
4997 | ||
4998 | z. Noted in the documentation that `set -a' will cause functions to be | |
4999 | exported if they are defined after `set -a' is executed. | |
5000 | ||
5001 | aa. When an interactive login shell starts, if $PWD and $HOME refer to the | |
5002 | same directory but are not the same string, $PWD is set to $HOME. | |
5003 | ||
5004 | bb. Fixed `printf' to handle invalid floating point numbers better. | |
5005 | ||
5006 | cc. Temporary files are now created with random filenames, to improve security. | |
5007 | ||
5008 | dd. The readline initialization code now binds the custom bash functions and | |
5009 | key bindings after the readline defaults are set up. | |
5010 | ||
5011 | ee. Fixed the `source' builtin to no longer overwrite a shell function's | |
5012 | argument list, even if the sourced file changes the positional parameters. | |
5013 | ||
5014 | ff. A bug fix was made in the expansion of `$*' in contexts where it should | |
5015 | not be split, like assignment statements. | |
5016 | ||
5017 | gg. Fixed a bug in the parameter substring expansion to handle conditional | |
5018 | arithmetic expressions ( exp ? val1 : val2 ) without cutting the expression | |
5019 | off at the wrong `:'. | |
5020 | ||
5021 | hh. The `<>' redirection is no longer subject to the current setting of | |
5022 | `noclobber', as POSIX.2 specifies. | |
5023 | ||
5024 | ii. Fixed a bug in the conditional command parsing code that caused expressions | |
5025 | in parentheses to occasionally be parsed incorrectly. | |
5026 | ||
5027 | jj. Fixed a bug in the ((...)) arithmetic command to allow do...done or | |
5028 | {...} to follow the )) without an intervening list terminator. | |
5029 | ||
5030 | kk. `printf' now treats `\E' the same as `\e' when performing backslash escape | |
5031 | expansion for the `%b' format specifier. | |
5032 | ||
5033 | ll. When in POSIX mode, the shell no longer searches the current directory for | |
5034 | a file to be sourced with `.' or `source' if `.' is not in $PATH. | |
5035 | ||
5036 | mm. Interactive comments are no longer turned off when POSIX mode is disabled. | |
5037 | ||
5038 | nn. The UID, EUID, HOSTNAME variables are not set if they are in the shell's | |
5039 | environment when it starts up. | |
5040 | ||
5041 | oo. Fixed a bug in the `command' builtin so the effect of a command like | |
5042 | `command exec 4<file' is as if the `command' had been omitted. | |
5043 | ||
5044 | pp. ${foo[@]} and ${foo[*]} now work as in ksh93 if `foo' is not an array | |
5045 | variable. | |
5046 | ||
5047 | qq. ${#foo[X]}, where X is 0, @, or *, now work as in ksh93 if `foo' is not | |
5048 | an array variable. | |
5049 | ||
5050 | rr. The shell's idea of an absolute pathname now takes into account a | |
5051 | possible drive specification on Cygwin and other Windows systems. | |
5052 | ||
5053 | ss. Fixed a bug which caused incorrect parsing of some multi-character | |
5054 | constructs if they were split across input lines with backslash-newline | |
5055 | line continuation. | |
5056 | ||
5057 | tt. Fixed a bug that caused restricted shell mode to be set inappropriately | |
5058 | when trying to execute a shell script without a leading `#!'. | |
5059 | ||
5060 | uu. Shell function definitions no longer require that the body be a group | |
5061 | command ( {...} ), as POSIX.2 requires. | |
5062 | ||
5063 | vv. The `cd' and `pwd' builtins now process symlinks in pathnames internally | |
5064 | and should require many fewer calls to getcwd(). | |
5065 | ||
5066 | ww. Fixed a bug that caused a pipeline's process group to be set incorrectly | |
5067 | if one of the pipeline elements contained a command substitution. | |
5068 | ||
5069 | xx. Fixed a bug that caused core dumps when expanding the value of HISTIGNORE. | |
5070 | ||
5071 | yy. The output of `set' is now quoted using $'...' so invisible characters are | |
5072 | displayed as escape sequences. | |
5073 | ||
5074 | zz. Fixed the help text for `unset', since PATH and IFS may both be unset. | |
5075 | ||
5076 | aaa. The shell no longer puts directory names into the command hash table. | |
5077 | ||
5078 | bbb. Fixed a bug in `read' that caused it to occasionally free memory twice if | |
5079 | it was interrupted after reading a large amount of data. | |
5080 | ||
5081 | ccc. Assignment statements that attempt to assign values to readonly variables | |
5082 | now cause the command to return an error status. | |
5083 | ||
5084 | ddd. Fixed a bug that could cause incorrect output if a $(<file) construct was | |
5085 | interrupted. | |
5086 | ||
5087 | eee. GROUPS and FUNCNAME now return an error status when assignment is | |
5088 | attempted, but may be unset (in which case they lose their special | |
5089 | properties). In all respects except unsetting, they are readonly. | |
5090 | ||
5091 | fff. The string-to-integer conversion code now ignores trailing whitespace in | |
5092 | the string, even if strtol(3) does not. | |
5093 | ||
5094 | ggg. The tcsh magic-space function now does a better job of inserting the | |
5095 | space close to where the point was before the history expansion, rather | |
5096 | than just appending it. | |
5097 | ||
5098 | hhh. Fixed a bug which caused a file sourced from an interactive shell to | |
5099 | fill up the jobs table if it ran lots of jobs. | |
5100 | ||
5101 | iii. Fixed a bug in the parameter pattern substitution code to avoid infinite | |
5102 | recursion on zero-length matches. | |
5103 | ||
5104 | 2. Changes to Readline | |
5105 | ||
5106 | a. When setting the terminal attributes on systems using `struct termio', | |
5107 | readline waits for output to drain before changing the attributes. | |
5108 | ||
5109 | b. A fix was made to the history word tokenization code to avoid attempts to | |
5110 | dereference a null pointer. | |
5111 | ||
5112 | c. Readline now defaults rl_terminal_name to $TERM if the calling application | |
5113 | has left it unset, and tries to initialize with the resultant value. | |
5114 | ||
5115 | d. Instead of calling (*rl_getc_function)() directly to get input in certain | |
5116 | places, readline now calls rl_read_key() consistently. | |
5117 | ||
5118 | e. Fixed a bug in the completion code that allowed a backslash to quote a | |
5119 | single quote inside a single-quoted string. | |
5120 | ||
5121 | f. rl_prompt is no longer assigned directly from the argument to readline(), | |
5122 | but uses memory allocated by readline. This allows constant strings to | |
5123 | be passed to readline without problems arising when the prompt processing | |
5124 | code wants to modify the string. | |
5125 | ||
5126 | g. Fixed a bug that caused non-interactive history searches to return the | |
5127 | wrong line when performing multiple searches backward for the same string. | |
5128 | ||
5129 | h. Many variables, function arguments, and function return values are now | |
5130 | declared `const' where appropriate, to improve behavior when linking with | |
5131 | C++ code. | |
5132 | ||
5133 | i. The control character detection code now works better on systems where | |
5134 | `char' is unsigned by default. | |
5135 | ||
5136 | j. The vi-mode numeric argument is now capped at 999999, just like emacs mode. | |
5137 | ||
5138 | k. The Function, CPFunction, CPPFunction, and VFunction typedefs have been | |
5139 | replaced with a set of specific prototyped typedefs, though they are | |
5140 | still in the readline header files for backwards compatibility. | |
5141 | ||
5142 | m. Nearly all of the (undocumented) internal global variables in the library | |
5143 | now have an _rl_ prefix -- there were a number that did not, like | |
5144 | screenheight, screenwidth, alphabetic, etc. | |
5145 | ||
5146 | n. The ding() convenience function has been renamed to rl_ding(), though the | |
5147 | old function is still defined for backwards compatibility. | |
5148 | ||
5149 | o. The completion convenience functions filename_completion_function, | |
5150 | username_completion_function, and completion_matches now have an rl_ | |
5151 | prefix, though the old names are still defined for backwards compatibility. | |
5152 | ||
5153 | p. The functions shared by readline and bash (linkage is satisfied from bash | |
5154 | when compiling with bash, and internally otherwise) now have an sh_ prefix. | |
5155 | ||
5156 | q. Changed the shared library creation procedure on Linux and BSD/OS 4.x so | |
5157 | that the `soname' contains only the major version number rather than the | |
5158 | major and minor numbers. | |
5159 | ||
5160 | r. Fixed a redisplay bug that occurred when the prompt spanned more than one | |
5161 | physical line and contained invisible characters. | |
5162 | ||
5163 | 3. New Features in Bash | |
5164 | ||
5165 | a. Added a new `--init-file' invocation argument as a synonym for `--rcfile', | |
5166 | per the new GNU coding standards. | |
5167 | ||
5168 | b. The /dev/tcp and /dev/udp redirections now accept service names as well as | |
5169 | port numbers. | |
5170 | ||
5171 | c. `complete' and `compgen' now take a `-o value' option, which controls some | |
5172 | of the aspects of that compspec. Valid values are: | |
5173 | ||
5174 | default - perform bash default completion if programmable | |
5175 | completion produces no matches | |
5176 | dirnames - perform directory name completion if programmable | |
5177 | completion produces no matches | |
5178 | filenames - tell readline that the compspec produces filenames, | |
5179 | so it can do things like append slashes to | |
5180 | directory names and suppress trailing spaces | |
5181 | ||
5182 | 4. New Features in Readline | |
5183 | ||
5184 | a. The blink timeout for paren matching is now settable by applications. | |
5185 | ||
5186 | b. _rl_executing_macro has been renamed to rl_executing_macro, which means | |
5187 | it's now part of the public interface. | |
5188 | ||
5189 | c. Readline has a new variable, rl_readline_state, which is a bitmap that | |
5190 | encapsulates the current state of the library; intended for use by | |
5191 | callbacks and hook functions. | |
5192 | ||
5193 | ------------------------------------------------------------------------------ | |
bb70624e JA |
5194 | This document details the changes between this version, bash-2.04-release, |
5195 | and the previous version, bash-2.04-beta5. | |
5196 | ||
5197 | 1. Changes to Bash | |
5198 | ||
5199 | a. Better compile-time and configure-time checks for the necessity of | |
5200 | inet_aton(). | |
5201 | ||
5202 | b. A bug was fixed in the expansion of "${@:-}" when there are positional | |
5203 | parameters. | |
5204 | ||
5205 | c. A typo was fixed in the output of `complete'. | |
5206 | ||
5207 | d. The matches generated for a word by the `-W' argument to complete and | |
5208 | compgen are now matched against the word being completed, and only | |
5209 | matches are returned as the result. | |
5210 | ||
5211 | e. Some fixes were made for systems which do not restart read(2) when a | |
5212 | signal caught by bash is received. | |
5213 | ||
5214 | f. A bug was fixed which caused the umask to be set to 0 when an invalid | |
5215 | symbolic mode mask was parsed. | |
5216 | ||
5217 | g. Fixed a bug that could cause a core dump if a SIGCHLD was received while | |
5218 | performing an assignment statement using command substitution. | |
5219 | ||
5220 | h. Changed the word splitting function for programmable completion so cases | |
5221 | in which the cursor is between words are handled a bit better. | |
5222 | ||
5223 | 2. Changes to Readline | |
5224 | ||
5225 | a. rl_funmap_names() is now documented. | |
5226 | ||
5227 | 3. New Features in Bash | |
5228 | ||
5229 | a. The LC_NUMERIC variable is now treated specially, and used to set the | |
5230 | LC_NUMERIC locale category for number formatting, e.g., when `printf' | |
5231 | displays floating-point numbers. | |
5232 | ||
5233 | ------------------------------------------------------------------------------ | |
5234 | This document details the changes between this version, bash-2.04-beta5, | |
5235 | and the previous version, bash-2.04-beta4. | |
5236 | ||
5237 | 1. Changes to Bash | |
5238 | ||
5239 | a. A couple of changes were made to the Makefiles for easier building on | |
5240 | non-Unix systems. | |
5241 | ||
5242 | b. Fixed a bug where the current prompt would be set to $PS2 at startup. | |
5243 | ||
5244 | c. The shell script that tests an already-installed version was changed to | |
5245 | remove the directory it created its test programs in at exit. | |
5246 | ||
5247 | d. Several changes were made to the code that tokenizes an input line for | |
5248 | the programmable completion code. Shell metacharacters will now appear | |
5249 | as individual words in the word list passed to the completion functions. | |
5250 | Some of the example completion shell functions were changed to understand | |
5251 | redirection operators. | |
5252 | ||
5253 | e. A bug was fixed that, under obscure circumstances, could confuse the | |
5254 | parser when a shell function was run by the programmable completion code. | |
5255 | ||
5256 | f. A bug was fixed in the ulimit builtin for systems not using getrlimit(). | |
5257 | ||
5258 | g. The execution code now propagates the correct exit status back to the rest | |
5259 | of the code if the return value of a subshell command was being inverted. | |
5260 | Some new test cases for inverting return values with the `!' reserved | |
5261 | word have been added. | |
5262 | ||
5263 | h. Negative exponents in the arithmetic evaluation of v**e now return an | |
5264 | evaluation error. | |
5265 | ||
5266 | i. A bug that caused bash to check the wrong process in a pipeline for | |
5267 | abnormal termination (and consequently resetting the terminal attributes) | |
5268 | was fixed. | |
5269 | ||
5270 | j. Fixed a bug that caused $PS2 to be displayed after PROMPT_COMMAND was | |
5271 | executed. | |
5272 | ||
5273 | 2. Changes to Readline | |
5274 | ||
5275 | 1. Fixed a bug in a C preprocessor define that caused the keypad control | |
5276 | functions to be compiled out for all platforms except DJGPP. | |
5277 | ||
5278 | ------------------------------------------------------------------------------ | |
5279 | This document details the changes between this version, bash-2.04-beta4, | |
5280 | and the previous version, bash-2.04-beta3. | |
5281 | ||
5282 | 1. Changes to Bash | |
5283 | ||
5284 | a. A couple of changes were made to the redirection to attempt to avoid | |
5285 | race conditions and malicious file replacement. | |
5286 | ||
5287 | 2. A change was made to the string evaluation code (used for command | |
5288 | substitution, `eval', and the `.' builtin) to fix an obscure core | |
5289 | dump on alpha machines. | |
5290 | ||
5291 | 3. A bug that caused $LINENO to be wrong when executing arithmetic for | |
5292 | commands was fixed. | |
5293 | ||
5294 | 4. A couple of memory leaks in the programmable completion code were fixed. | |
5295 | ||
5296 | 5. A bug that could cause a core dump by freeing memory twice during a call | |
5297 | to `eval' if `set -u' had been enabled and an undefined variable was | |
5298 | referenced was fixed. | |
5299 | ||
5300 | ------------------------------------------------------------------------------ | |
5301 | This document details the changes between this version, bash-2.04-beta3, | |
5302 | and the previous version, bash-2.04-beta2. | |
5303 | ||
5304 | 1. Changes to Bash | |
5305 | ||
5306 | a. Bash should run the appropriate startup files when invoked by ssh2. | |
5307 | ||
5308 | b. Fixed a bug in the parsing of conditional commands that could cause a | |
5309 | core dump. | |
5310 | ||
5311 | c. Fixed a bug in parsing job specifications that occasionally caused | |
5312 | core dumps when an out-of-range job was referenced. | |
5313 | ||
5314 | d. Fixed the `type' and `command' builtins to do better reporting of | |
5315 | commands that are not found in $PATH or the hash table. | |
5316 | ||
5317 | e. Fixed a POSIX.2 compliance problem in the command builtin -- commands | |
5318 | are supposed to be reported as full pathnames. | |
5319 | ||
5320 | f. The `echo' builtin now returns failure if a write error occurs. | |
5321 | ||
5322 | g. Fixed a bug which caused the locale to not be reset correctly when | |
5323 | LC_ALL was unset. | |
5324 | ||
5325 | h. Changed description of `getopts' in man page and reference manual to make | |
5326 | it clear that option characters may be characters other than letters. | |
5327 | ||
5328 | i. If the shell exits while in a function, make sure that any trap on EXIT | |
5329 | doesn't think the function is still executing. | |
5330 | ||
5331 | j. Bashbug now tries harder to find a usable editor if $EDITOR is not set, | |
5332 | rather than simply defaulting to `emacs'. | |
5333 | ||
5334 | k. Changes to the scripts that guess and canonicalize the system type, from | |
5335 | the latest `automake' distribution via Debian. | |
5336 | ||
5337 | l. When using named pipes for process substitution, make sure the file | |
5338 | descriptors opened for reading are set to non-blocking mode. | |
5339 | ||
5340 | m. Fixed a bug that caused termination of pipelines that are killed by a | |
5341 | signal to not be reported in some cases. | |
5342 | ||
5343 | n. When not in literal-history mode, shell comment lines are not added to | |
5344 | the history list. | |
5345 | ||
5346 | o. When running in POSIX.2 mode, bash no longer performs word splitting on | |
5347 | the expanded value of the word supplied as the filename argument to | |
5348 | redirection operators. | |
5349 | ||
5350 | p. The prompt string decoding code now backslash-quotes only characters that | |
5351 | are special within double quotes when expanding the \w and \W escape | |
5352 | sequences. | |
5353 | ||
5354 | q. Fixed a bug in the prompt decoding code that could cause a non-interactive | |
5355 | shell to seg fault if `\u' was used in PS4 and the shell was in xtrace | |
5356 | mode. | |
5357 | ||
5358 | r. Fixed a bug that caused function definitions to be printed with any | |
5359 | redirections that should be attached to the entire function before the | |
5360 | closing brace. | |
5361 | ||
5362 | s. Changed the tilde expansion code for Cygwin systems to avoid creating | |
5363 | pathnames beginning with `//' if $HOME == `/'. | |
5364 | ||
5365 | t. Fixed a couple of autoconf tests to avoid creating files with fixed names | |
5366 | in /tmp. | |
5367 | ||
5368 | u. The `trap' and `kill' builtins now know the names of the POSIX.1b real- | |
5369 | time signals on systems which support them. | |
5370 | ||
5371 | 2. Changes to Readline | |
5372 | ||
5373 | a. Fixed a problem with the single-quote quoting function that could cause | |
5374 | buffer overflows. | |
5375 | ||
5376 | b. Fixed a bug that caused incorrect `stat characters' to be printed if | |
5377 | the files being completed were in the root directory and visible-stats | |
5378 | was enabled. | |
5379 | ||
5380 | 3. New Features in Bash | |
5381 | ||
5382 | a. There is a new `rbash.1' manual page, from the Debian release. | |
5383 | ||
5384 | b. The `--enable-usg-echo-default' option to `configure' has been renamed to | |
5385 | `--enable-xpg-echo-default'. The old option is still there for backwards | |
5386 | compatibility. | |
5387 | ||
5388 | ------------------------------------------------------------------------------ | |
5389 | This document details the changes between this version, bash-2.04-beta2, | |
5390 | and the previous version, bash-2.04-beta1. | |
5391 | ||
5392 | 1. Changes to Bash | |
5393 | ||
5394 | a. Fixed a bug that could cause pipes to be closed inappropriately in | |
5395 | some obscure cases. | |
5396 | ||
5397 | b. Fixed a bug that caused creation of the exported environment to clobber | |
5398 | the current command string if there were any exported shell functions. | |
5399 | ||
5400 | c. Some changes were made to reduce bash's memory usage. | |
5401 | ||
5402 | d. Fixed a problem with programmable completion and filenames to be | |
5403 | completed containing quote characters. | |
5404 | ||
5405 | e. Changed the code the removes named pipes created for the <(...) and >(...) | |
5406 | expansions to defer removal until after any current shell function has | |
5407 | finished executing. | |
5408 | ||
5409 | f. Fixed a bug in `select' which caused it to not handle the `continue' | |
5410 | builtin correctly. | |
5411 | ||
5412 | g. Autoconf tests added for cygwin32 and mingw32. | |
5413 | ||
5414 | 2. New Features in Bash | |
5415 | ||
5416 | a. The `--with-bash-malloc' configure option replaces `--with-gnu-malloc' | |
5417 | (which is still there for backwards compatibility). | |
5418 | ||
5419 | ------------------------------------------------------------------------------ | |
5420 | This document details the changes between this version, bash-2.04-beta1, | |
5421 | and the previous version, bash-2.04-alpha1. | |
5422 | ||
5423 | 1. Changes to Bash | |
5424 | ||
5425 | a. Fixed a bug in the programmable completion code that occurred when | |
5426 | trying to complete command lines containing a `;' or `@'. | |
5427 | ||
5428 | b. The file descriptor from which the shell is reading a script is now | |
5429 | moved to a file descriptor above the user-addressible range. | |
5430 | ||
5431 | c. Changes to `printf' so that it can handle integers beginning with 0 | |
5432 | or 0x as octal and hex, respectively. | |
5433 | ||
5434 | d. Fixes to the programmable completion code so it handles nonsense like | |
5435 | `compgen -C xyz' gracefully. | |
5436 | ||
5437 | e. The shell no longer modifies the signal handler for SIGPROF, allowing | |
5438 | profiling again on certain systems. | |
5439 | ||
5440 | f. The shell checks for a new window size, if the user has requested it, | |
5441 | after a process exits due to a signal. | |
5442 | ||
5443 | g. Fixed a bug with variables with null values in a program's temporary | |
5444 | environment and the bash getenv() replacement. | |
5445 | ||
5446 | h. `declare' and the other builtins that take variable assignments as | |
5447 | arguments now honor `set -a' and mark modified variables for export. | |
5448 | ||
5449 | i. Some changes were made for --dump-po-strings mode when writing strings | |
5450 | with embedded newlines. | |
5451 | ||
5452 | j. The code that caches export strings from the initial environment now | |
5453 | duplicates the string rather than just pointing into the environment. | |
5454 | ||
5455 | k. The filename completion quoting code now uses single quotes by default | |
5456 | if the filename being completed contains newlines, since \<newline> | |
5457 | has a special meaning to the parser. | |
5458 | ||
5459 | l. Bash now uses typedefs bits32_t and u_bits32_t instead of int32_t and | |
5460 | u_int32_t, respectively to avoid conflicts on certain Unix versions. | |
5461 | ||
5462 | m. Configuration changes were made for: Rhapsody, Mac OS, FreeBSD-3.x. | |
5463 | ||
5464 | n. Fixed a problem with hostname-to-ip-address translation in the | |
5465 | /dev/(tcp|udp)/hostname/port redirection code. | |
5466 | ||
5467 | o. The texinfo manual has been reorganized slightly. | |
5468 | ||
5469 | p. Filename generation (globbing) range comparisons in bracket expressions | |
5470 | no longer use strcoll(3) even if it is available, since it has unwanted | |
5471 | effects in certain locales. | |
5472 | ||
5473 | q. Fixed a cosmetic problem in the source that caused the shell to not | |
5474 | compile if DPAREN_ARITHMETIC was not defined but ARITH_FOR_COMMAND was. | |
5475 | ||
5476 | r. Fixed a bug in the here-document code tripped when the file descriptor | |
5477 | opened to the file containing the text of the here document was the | |
5478 | same as a redirector specified by the user. | |
5479 | ||
5480 | s. Fixed a bug where the INVERT_RETURN flag was not being set for `pipeline' | |
5481 | in `time ! pipeline'. | |
5482 | ||
5483 | t. Fixed a bug with the `wait' builtin which manifested itself when an | |
5484 | interrupt was received while the shell was waiting for asynchronous | |
5485 | processes in a shell script. | |
5486 | ||
5487 | u. Fixed the DEBUG trap code so that it has the correct value of $?. | |
5488 | ||
5489 | v. Fixed a bug in the parameter pattern substitution code that could cause | |
5490 | the shell to attempt to free unallocated memory if the pattern started | |
5491 | with `/' and an expansion error occurs. | |
5492 | ||
5493 | w. Fixed a bug in the positional parameter substring code that could | |
5494 | cause the shell to loop freeing freed memory. | |
5495 | ||
5496 | x. Fixed a bug in the positional parameter pattern substitution code so | |
5497 | that it correctly handles null replacement strings with a pattern | |
5498 | string prefixed with `%' or `#'. | |
5499 | ||
5500 | y. The shell no longer attempts to import functions from the environment if | |
5501 | started with `-n'. | |
5502 | ||
5503 | z. Fixed a bug that caused `return' in a command substitution executed in | |
5504 | a shell function to return from the function in a subshell and continue | |
5505 | execution. | |
5506 | ||
5507 | aa. `hash -p /pathname/with/slashes name' is no longer allowed when the shell | |
5508 | is restricted. | |
5509 | ||
5510 | bb. The wait* job control functions now behave better if called when there | |
5511 | are no unwaited-for children. | |
5512 | ||
5513 | cc. Command substitution no longer unconditionally disables job control in | |
5514 | the subshell started to run the command. | |
5515 | ||
5516 | dd. A bug was fixed that occasionally caused traps to mess up the parser | |
5517 | state. | |
5518 | ||
5519 | ee. `bashbug' now honors user headers in the mail message it sends. | |
5520 | ||
5521 | ff. A bug was fixed that caused the `:p' history modifier to not print the | |
5522 | history expansion if the `histverify' option was set. | |
5523 | ||
5524 | 2. Changes to Readline | |
5525 | ||
5526 | a. Fixed a bug in the redisplay code for lines with more than 256 line | |
5527 | breaks. | |
5528 | ||
5529 | b. A bug was fixed which caused invisible character markers to not be | |
5530 | stripped from the prompt string if the terminal was in no-echo mode. | |
5531 | ||
5532 | c. Readline no longer tries to get the variables it needs for redisplay | |
5533 | from the termcap entry if the calling application has specified its | |
5534 | own redisplay function. Readline treats the terminal as `dumb' in | |
5535 | this case. | |
5536 | ||
5537 | d. Fixes to the SIGWINCH code so that a multiple-line prompt with escape | |
5538 | sequences is redrawn correctly. | |
5539 | ||
5540 | 3. New Features in Bash | |
5541 | ||
5542 | a. `bashbug' now accepts `--help' and `--version' options. | |
5543 | ||
5544 | b. There is a new `xpg_echo' option to `shopt' that controls the behavior | |
5545 | of echo with respect to backslash-escaped characters at runtime. | |
5546 | ||
5547 | ------------------------------------------------------------------------------ | |
5548 | This document details the changes between this version, bash-2.04-alpha1, | |
5549 | and the previous version, bash-2.04-devel. | |
5550 | ||
5551 | 1. Changes to Bash | |
5552 | ||
5553 | a. Fixed a bug that could cause core dumps when performing substring | |
5554 | expansion. | |
5555 | ||
5556 | b. Shared object configuration changes for: Solaris, OSF/1 | |
5557 | ||
5558 | c. The POSIX_GLOB_LIBRARY code that uses the POSIX.2 globbing facilities | |
5559 | for pathname expansion now understands GLOBIGNORE. | |
5560 | ||
5561 | d. The code that implements `eval' was changed to save the value of the | |
5562 | current prompt, so an eval in a shell function called by the programmable | |
5563 | completion code will not change the prompt to $PS2. | |
5564 | ||
5565 | e. Restored the undocumented NON_INTERACTIVE_LOGIN_SHELLS #define to | |
5566 | config-top.h. If this is defined, all login shells will read the | |
5567 | startup files, not just interactive and non-interactive started with | |
5568 | the `--login' option. | |
5569 | ||
5570 | f. Fixed a bug that caused the expansion code to occasionally dump core if | |
5571 | IFS contained characters > 128. | |
5572 | ||
5573 | g. Fixed a problem with the grammar so that a newline is not required | |
5574 | after the `))' in the new-style arithmetic for statement; a semicolon | |
5575 | may be used as expected. | |
5576 | ||
5577 | h. Variable indirection may now reference the shell's special variables. | |
5578 | ||
5579 | i. The $'...' and $"..." constructs are now added to the history correctly | |
5580 | if they contain newlines and command-oriented history is enabled. | |
5581 | ||
5582 | j. It is now an error to try to assign a value to a function-local copy | |
5583 | of a readonly shell variable (declared with the `local' builtin). | |
5584 | ||
5585 | 2. Changes to Readline | |
5586 | ||
5587 | a. The history file code now uses O_BINARY mode when reading and writing | |
5588 | the history file on cygwin32. | |
5589 | ||
5590 | 3. New Features in Bash | |
5591 | ||
5592 | a. A new programmable completion facility, with two new builtin commands: | |
5593 | complete and compgen. | |
5594 | ||
5595 | b. configure has a new option, `--enable-progcomp', to compile in the | |
5596 | programmable completion features (enabled by default). | |
5597 | ||
5598 | c. `shopt' has a new option, `progcomp', to enable and disable programmable | |
5599 | completion at runtime. | |
5600 | ||
5601 | d. Unsetting HOSTFILE now clears the list of hostnames used for completion. | |
5602 | ||
5603 | 4. New Features in Readline | |
5604 | ||
5605 | a. A new variable, rl_gnu_readline_p, always 1. The intent is that an | |
5606 | application can verify whether or not it is linked with the `real' | |
5607 | readline library or some substitute. | |
5608 | ||
5609 | ------------------------------------------------------------------------------ | |
5610 | This document details the changes between this version, bash-2.04-devel, | |
5611 | and the previous version, bash-2.03-release. | |
5612 | ||
5613 | 1. Changes to Bash | |
5614 | ||
5615 | a. System-specific configuration and source changes for: Interix, Rhapsody | |
5616 | ||
5617 | b. Fixed a bug in execute_cmd.c that resulted in a compile-time error if | |
5618 | JOB_CONTROL was not defined. | |
5619 | ||
5620 | c. An obscure race condition in the trap code was fixed. | |
5621 | ||
5622 | d. The string resulting from $'...' is now requoted to avoid any further | |
5623 | expansion. | |
5624 | ||
5625 | e. The $'...' quoting syntax now allows backslash to escape a single quote, | |
5626 | for ksh-93 compatibility. | |
5627 | ||
5628 | f. The $"..." quoting syntax now escapes backslashes and double quotes in | |
5629 | the translated string when displaying them with the --dump-po-strings | |
5630 | option. | |
5631 | ||
5632 | g. `echo -e' no longer converts \' to '. | |
5633 | ||
5634 | h. Fixes were made to the extended globbing code to handle embedded (...) | |
5635 | patterns better. | |
5636 | ||
5637 | i. Some improvements were made to the code that unsets `nodelay' mode on | |
5638 | the file descriptor from which bash is reading input. | |
5639 | ||
5640 | j. Some changes were made to the replacement termcap library for better | |
5641 | operation on MS-DOS. | |
5642 | ||
5643 | k. Some changes were made to the tilde expansion code to handle backslash | |
5644 | as a pathname separator on MS-DOS. | |
5645 | ||
5646 | l. The source has been reorganized a little bit -- there is now an `include' | |
5647 | subdirectory, and lib/posixheaders has been removed. | |
5648 | ||
5649 | m. Improvements were made to the `read' builtin so that it makes many | |
5650 | fewer read(2) system calls. | |
5651 | ||
5652 | n. The expansion of $- will include `c' and `s' when those options are | |
5653 | supplied at shell invocation. | |
5654 | ||
5655 | o. Several improvments were made to the completion code: variable completion | |
5656 | now works better when there are unterminated expansions, command | |
5657 | completion understands quotes better, and completion now works in certain | |
5658 | unclosed $(... constructs. | |
5659 | ||
5660 | p. The arithmetic expansion code was fixed to not need the value of a | |
5661 | variable being assigned a value (fixes the "ss=09; let ss=10" bug). | |
5662 | ||
5663 | q. Some changes were made to make exported environment creation faster. | |
5664 | ||
5665 | r. The html documentation will be installed into $(htmldir) if that variable | |
5666 | has a value when `make install' is run. | |
5667 | ||
5668 | s. Fixed a bug that would cause the bashrc file to be sourced inappropriately | |
5669 | when bash is started by sshd. | |
5670 | ||
5671 | t. The SSH_CLIENT environment variable is no longer auto-exported. | |
5672 | ||
5673 | u. A bug that caused redirections with (...) subshells to be performed in | |
5674 | the wrong order was fixed. | |
5675 | ||
28ef6c31 | 5676 | v. A bug that occasionally caused inappropriate expansion of assignment |
bb70624e JA |
5677 | statements in compound array assignments was fixed. |
5678 | ||
5679 | w. The code that parses the words in a compound array assignment was | |
5680 | simplified considerably and should work better now. | |
5681 | ||
5682 | x. Fixes to the non-job-control code in nojobs.c to make it POSIX.2-compliant | |
5683 | when a user attempts to retrieve the status of a terminated background | |
5684 | process. | |
5685 | ||
5686 | y. Fixes to the `printf' builtin so that it doesn't try to expand all | |
5687 | backslash escape sequences in the format string before parsing it for | |
5688 | % format specifiers. | |
5689 | ||
5690 | 2. Changes to Readline | |
5691 | ||
5692 | a. The history library tries to truncate the history file only if it is a | |
5693 | regular file. | |
5694 | ||
5695 | b. A bug that caused _rl_dispatch to address negative array indices on | |
5696 | systems with signed chars was fixed. | |
5697 | ||
5698 | c. rl-yank-nth-arg now leaves the history position the same as when it was | |
5699 | called. | |
5700 | ||
5701 | d. Changes to the completion code to handle MS-DOS drive-letter:pathname | |
5702 | filenames. | |
5703 | ||
5704 | e. Completion is now case-insensitive by default on MS-DOS. | |
5705 | ||
5706 | f. Fixes to the history file manipulation code for MS-DOS. | |
5707 | ||
5708 | g. Readline attempts to bind the arrow keys to appropriate defaults on MS-DOS. | |
5709 | ||
5710 | h. Some fixes were made to the redisplay code for better operation on MS-DOS. | |
5711 | ||
5712 | i. The quoted-insert code will now insert tty special chars like ^C. | |
5713 | ||
5714 | j. A bug was fixed that caused the display code to reference memory before | |
5715 | the start of the prompt string. | |
5716 | ||
5717 | k. More support for __EMX__ (OS/2). | |
5718 | ||
5719 | l. A bug was fixed in readline's signal handling that could cause infinite | |
5720 | recursion in signal handlers. | |
5721 | ||
5722 | m. A bug was fixed that caused the point to be less than zero when rl_forward | |
5723 | was given a very large numeric argument. | |
5724 | ||
5725 | n. The vi-mode code now gets characters via the application-settable value | |
5726 | of rl_getc_function rather than calling rl_getc directly. | |
5727 | ||
5728 | 3. New Features in Bash | |
5729 | ||
5730 | a. The history builtin has a `-d offset' option to delete the history entry | |
5731 | at position `offset'. | |
5732 | ||
5733 | b. The prompt expansion code has two new escape sequences: \j, the number of | |
5734 | active jobs; and \l, the basename of the shell's tty device name. | |
5735 | ||
5736 | c. The `bind' builtin has a new `-x' option to bind key sequences to shell | |
5737 | commands. | |
5738 | ||
5739 | d. There is a new shell option, no_empty_command_completion, which, when | |
5740 | enabled, disables command completion when TAB is typed on an empty line. | |
5741 | ||
5742 | e. The `help' builtin has a `-s' option to just print a builtin's usage | |
5743 | synopsys. | |
5744 | ||
5745 | f. There are several new arithmetic operators: id++, id-- (variable | |
5746 | post-increment/decrement), ++id, --id (variabl pre-increment/decrement), | |
5747 | expr1 , expr2 (comma operator). | |
5748 | ||
5749 | g. There is a new ksh-93 style arithmetic for command: | |
5750 | for ((expr1 ; expr2; expr3 )); do list; done | |
5751 | ||
5752 | h. The `read' builtin has a number of new options: | |
5753 | -t timeout only wait timeout seconds for input | |
5754 | -n nchars only read nchars from input instead of a full line | |
5755 | -d delim read until delim rather than newline | |
5756 | -s don't echo input chars as they are read | |
5757 | ||
5758 | i. The redirection code now handles several filenames specially: | |
5759 | /dev/fd/N, /dev/stdin, /dev/stdout, and /dev/stderr, whether or | |
5760 | not they are present in the file system. | |
5761 | ||
5762 | j. The redirection code now recognizes pathnames of the form | |
5763 | /dev/tcp/host/port and /dev/udp/host/port, and tries to open a socket | |
5764 | of the appropriate type to the specified port on the specified host. | |
5765 | ||
5766 | k. The ksh-93 ${!prefix*} expansion, which expands to the names of all | |
5767 | shell variables whose names start with prefix, has been implemented. | |
5768 | ||
5769 | l. There is a new dynamic variable, FUNCNAME, which expands to the name of | |
5770 | a currently-executing function. Assignments to FUNCNAME have no effect. | |
5771 | ||
5772 | m. The GROUPS variable is no longer readonly; assignments to it are silently | |
5773 | discarded. This means it can be unset. | |
5774 | ||
5775 | 4. New Features in Readline | |
5776 | ||
5777 | a. Parentheses matching is now always compiled into readline, and enabled | |
5778 | or disabled when the value of the `blink-matching-paren' variable is | |
5779 | changed. | |
5780 | ||
5781 | b. MS-DOS systems now use ~/_inputrc as the last-ditch inputrc filename. | |
5782 | ||
5783 | c. MS-DOS systems now use ~/_history as the default history file. | |
5784 | ||
5785 | d. history-search-{forward,backward} now leave the point at the end of the | |
5786 | line when the string to search for is empty, like | |
5787 | {reverse,forward}-search-history. | |
5788 | ||
5789 | e. history-search-{forward,backward} now leave the last history line found | |
5790 | in the readline buffer if the second or subsequent search fails. | |
5791 | ||
5792 | f. New function for use by applications: rl_on_new_line_with_prompt, used | |
5793 | when an application displays the prompt itself before calling readline(). | |
5794 | ||
5795 | g. New variable for use by applications: rl_already_prompted. An application | |
5796 | that displays the prompt itself before calling readline() must set this to | |
5797 | a non-zero value. | |
5798 | ||
5799 | ------------------------------------------------------------------------------ | |
b72432fd JA |
5800 | This document details the changes between this version, bash-2.03-release, |
5801 | and the previous version, bash-2.03-beta2. | |
5802 | ||
5803 | 1. Changes to Bash | |
5804 | ||
5805 | a. A file descriptor leak in the `fc' builtin was fixed. | |
5806 | ||
5807 | b. A bug was fixed in the `read' builtin that caused occasional spurious | |
5808 | failures when using `read -e'. | |
5809 | ||
5810 | c. The version code needed to use the value of the cpp variable | |
5811 | CONF_MACHTYPE rather than MACHTYPE. | |
5812 | ||
5813 | d. A new test was added to exercise the command printing and copying code. | |
5814 | ||
5815 | e. A bug was fixed that caused `time' to be recognized as a reserved word | |
5816 | if it was the first pattern in a `case' statement pattern list. | |
5817 | ||
5818 | ------------------------------------------------------------------------------ | |
5819 | This document details the changes between this version, bash-2.03-beta2, | |
5820 | and the previous version, bash-2.03-beta1. | |
5821 | ||
5822 | 1. Changes to Bash | |
5823 | ||
5824 | a. Slight additions to support/shobj-conf, mostly for the benefit of AIX 4.2. | |
5825 | ||
5826 | b. config.{guess,sub} support added for the NEC SX4. | |
5827 | ||
5828 | c. Changed some of the cross-compiling sections of the configure macros in | |
5829 | aclocal.m4 so that configure won't abort. | |
5830 | ||
5831 | d. Slight changes to how the HTML versions of the bash and readline manuals | |
5832 | are generated. | |
5833 | ||
5834 | e. Fixed conditional command printing to avoid interpreting printf `%'-escapes | |
5835 | in arguments to [[. | |
5836 | ||
5837 | f. Don't include the bash malloc on all variants of the alpha processor. | |
5838 | ||
5839 | g. Changes to configure to make --enable-profiling work on Solaris 2.x. | |
5840 | ||
5841 | h. Fixed a bug that manifested itself when shell functions were called | |
5842 | between calls to `getopts'. | |
5843 | ||
5844 | i. Fixed pattern substitution so that a bare `#'as a pattern causes the | |
5845 | replacement string to be prefixed to the search string, and a bare | |
5846 | `%' causes the replacement string to be appended to the search string. | |
5847 | ||
5848 | j. Fixed a bug in the command execution code that caused child processes | |
5849 | to occasionally have the wrong value for $!. | |
5850 | ||
5851 | 2. Changes to Readline | |
5852 | ||
5853 | a. Added code to the history library to catch history substitutions using | |
5854 | `&' without a previous history substitution or search having been | |
5855 | performed. | |
5856 | ||
5857 | 3. New Features in Bash | |
5858 | ||
5859 | 4. New Features in Readline | |
5860 | ||
5861 | a. New bindable variable: `isearch-terminators'. | |
5862 | ||
5863 | b. New bindable function: `forward-backward-delete-char' (unbound by default). | |
5864 | ||
5865 | ------------------------------------------------------------------------------ | |
5866 | This document details the changes between this version, bash-2.03-beta1, | |
5867 | and the previous version, bash-2.03-alpha. | |
5868 | ||
5869 | 1. Changes to Bash | |
5870 | ||
5871 | a. A change was made to the help text for `{...}' to make it clear that a | |
5872 | semicolon is required before the closing brace. | |
5873 | ||
5874 | b. A fix was made to the `test' builtin so that syntax errors cause test | |
5875 | to return an exit status > 1. | |
5876 | ||
5877 | c. Globbing is no longer performed on assignment statements that appear as | |
5878 | arguments to `assignment builtins' such as `export'. | |
5879 | ||
5880 | d. System-specific configuration changes were made for: Rhapsody, | |
5881 | AIX 4.2/gcc, BSD/OS 4.0. | |
5882 | ||
5883 | e. New loadable builtins: ln, unlink. | |
5884 | ||
5885 | f. Some fixes were made to the globbing code to handle extended glob patterns | |
5886 | which immediately follow a `*'. | |
5887 | ||
5888 | g. A fix was made to the command printing code to ensure that redirections | |
5889 | following compound commands have a space separating them from the rest | |
5890 | of the command. | |
5891 | ||
5892 | h. The pathname canonicalization code was changed to produce fewer leading | |
5893 | `//' sequences, since those are interpreted as network file system | |
5894 | pathnames on some systems. | |
5895 | ||
5896 | i. A fix was made so that loops containing `eval' commands in commands passed | |
5897 | to `bash -c' would not exit prematurely. | |
5898 | ||
5899 | j. Some changes were made to the job reaping code when the shell is not | |
5900 | interactive, so the shell will retain exit statuses longer for examination | |
5901 | by `wait'. | |
5902 | ||
5903 | k. A fix was made so that `jobs | command' works again. | |
5904 | ||
5905 | l. The erroneous compound array assignment var=((...)) is now a syntax error. | |
5906 | ||
5907 | m. A change was made to the dynamic loading code in `enable' to support | |
5908 | Tenon's MachTen. | |
5909 | ||
5910 | n. A fix was made to the globbing code so that extended globbing patterns | |
5911 | will correctly match `.' in a bracket expression. | |
5912 | ||
5913 | 2. Changes to Readline | |
5914 | ||
5915 | a. A fix was made to the completion code in which a typo caused the wrong | |
5916 | value to be passed to the function that computed the longest common | |
5917 | prefix of the list of matches. | |
5918 | ||
5919 | b. The completion code now checks the value of rl_filename_completion_desired, | |
5920 | which is set by application-supplied completion functions to indicate | |
5921 | that filename completion is being performed, to decide whether or not to | |
5922 | call an application-supplied `ignore completions' function. | |
5923 | ||
5924 | 3. New Features in Bash | |
5925 | ||
5926 | a. A change was made to the startup file code so that any shell begun with | |
5927 | the `--login' option, even non-interactive shells, will source the login | |
5928 | shell startup files. | |
5929 | ||
5930 | 4. New Features in Readline | |
5931 | ||
5932 | a. A new variable, rl_erase_empty_line, which, if set by an application using | |
5933 | readline, will cause readline to erase, prompt and all, lines on which the | |
5934 | only thing typed was a newline. | |
5935 | ||
5936 | ------------------------------------------------------------------------------ | |
5937 | This document details the changes between this version, bash-2.03-alpha, | |
5938 | and the previous version, bash-2.02.1-release. | |
5939 | ||
5940 | 1. Changes to Bash | |
5941 | ||
5942 | a. System-specific configuration changes were made for: Irix 6.x, Unixware 7. | |
5943 | ||
5944 | b. The texi2dvi and texi2html scripts were updated to the latest versions | |
5945 | from the net. | |
5946 | ||
5947 | c. The configure tests that determine which native type is 32 bits were | |
5948 | changed to not require a compiled program. | |
5949 | ||
5950 | d. Fixed a bug in shell_execve that could cause memory to be freed twice | |
5951 | after a failed exec. | |
5952 | ||
5953 | e. The `printf' test uses `diff -a' if it's available to prevent confusion | |
5954 | due to the non-ascii output. | |
5955 | ||
5956 | f. Shared object configuration is now performed by a shell script, | |
5957 | support/shobj-conf, which generates values to be substituted into | |
5958 | makefiles by configure. | |
5959 | ||
5960 | g. Some changes were made to `ulimit' to avoid the use of RLIM_INVALID as a | |
5961 | return value. | |
5962 | ||
5963 | h. Changes were made to `ulimit' to work around HPUX 9.x's peculiar | |
5964 | handling of RLIMIT_FILESIZE. | |
5965 | ||
5966 | i. Some new loadable builtins were added: id, printenv, sync, whoami, push, | |
5967 | mkdir. `pushd', `popd', and `dirs' can now be built as regular or | |
5968 | loadable builtins from the same source file. | |
5969 | ||
5970 | j. Changes were made to `printf' to handle NUL bytes in the expanded format | |
5971 | string. | |
5972 | ||
5973 | k. The various `make clean' Makefile targets now descend into lib/sh. | |
5974 | ||
5975 | l. The `type' builtin was changed to use the internal `getopt' so that things | |
5976 | like `type -ap' work as expected. | |
5977 | ||
5978 | m. There is a new configuration option, --with-installed-readline, to link | |
5979 | bash with a locally-installed version of readline. Only readline version | |
5980 | 4.0 and later releases can support this. Shared and static libraries | |
5981 | are supported. The installed include files are used. | |
5982 | ||
5983 | n. There is a new autoconf macro used to find which basic type is 64 bits. | |
5984 | ||
5985 | o. Dynamic linking and loadable builtins should now work on SCO 3.2v5*, | |
5986 | AIX 4.2 with gcc, Unixware 7, and many other systems using gcc, where | |
5987 | the `-shared' options works correctly. | |
5988 | ||
5989 | p. A bug was fixed in the bash filename completion code that caused memory to | |
5990 | be freed twice if a directory name containing an unset variable was | |
5991 | completed and the -u option was set. | |
5992 | ||
5993 | q. The prompt expansion code now quotes the `$' in the `\$' expansion so it | |
5994 | is not processed by subsequent parameter expansion. | |
5995 | ||
5996 | r. Fixed a parsing bug that caused a single or double quote after a `$$' to | |
5997 | trigger ANSI C expansion or locale translation. | |
5998 | ||
5999 | s. Fixed a bug in the globbing code that caused quoted filenames containing | |
6000 | no globbing characters to sometimes be incorrectly expanded. | |
6001 | ||
6002 | t. Changes to the default prompt strings if prompt string decoding is not | |
6003 | compiled into the shell. | |
6004 | ||
6005 | u. Added `do', `then', `else', `{', and `(' to the list of keywords that may | |
6006 | precede the `time' reserved word. | |
6007 | ||
6008 | v. The shell may now be cross-built for BeOS as well as cygwin32. | |
6009 | ||
6010 | w. The conditional command execution code now treats `=' the same as `==' | |
6011 | for deciding when to perform pattern matching. | |
6012 | ||
6013 | x. The `-e' option no longer causes the shell to exit if a command exits | |
6014 | with a non-zero status while running the startup files. | |
6015 | ||
6016 | y. The `printf' builtin no longer dumps core if a modifier is supplied in | |
6017 | the format string without a conversion character (e.g. `%h'). | |
6018 | ||
6019 | z. Array assignments of the form a=(...) no longer show up in the history | |
6020 | list. | |
6021 | ||
6022 | aa. The parser was fixed to obey the POSIX.2 rules for finding the closing | |
6023 | `}' in a ${...} expression. | |
6024 | ||
6025 | bb. The history file is now opened with mode 0600 rather than 0666, so bash | |
6026 | no longer relies on the user's umask being set appropriately. | |
6027 | ||
6028 | cc. Setting LANG no longer causes LC_ALL to be assigned a value; bash now | |
6029 | relies on proper behavior from the C library. | |
6030 | ||
6031 | dd. Minor changes were made to allow quoted variable expansions using | |
6032 | ${...} to be completed correctly if there is no closing `"'. | |
6033 | ||
6034 | ee. Changes were made to builtins/Makefile.in so that configuring the shell | |
6035 | with `--enable-profiling' works right and builtins/mkbuiltins is | |
6036 | generated. | |
6037 | ||
6038 | 2. Changes to Readline | |
6039 | ||
6040 | a. The version number is now 4.0. | |
6041 | ||
6042 | b. There is no longer any #ifdef SHELL code in the source files. | |
6043 | ||
6044 | c. Some changes were made to the key binding code to fix memory leaks and | |
6045 | better support Win32 systems. | |
6046 | ||
6047 | d. Fixed a silly typo in the paren matching code -- it's microseconds, not | |
6048 | milliseconds. | |
6049 | ||
6050 | e. The readline library should be compilable by C++ compilers. | |
6051 | ||
6052 | f. The readline.h public header file now includes function prototypes for | |
6053 | all readline functions, and some changes were made to fix errors in the | |
6054 | source files uncovered by the use of prototypes. | |
6055 | ||
6056 | g. The maximum numeric argument is now clamped at 1000000. | |
6057 | ||
6058 | h. Fixes to rl_yank_last_arg to make it behave better. | |
6059 | ||
6060 | i. Fixed a bug in the display code that caused core dumps if the prompt | |
6061 | string length exceeded 1024 characters. | |
6062 | ||
6063 | j. The menu completion code was fixed to properly insert a single completion | |
6064 | if there is only one match. | |
6065 | ||
6066 | k. A bug was fixed that caused the display code to improperly display tabs | |
6067 | after newlines. | |
6068 | ||
6069 | 3. New Features in Bash | |
6070 | ||
6071 | a. New `shopt' option, `restricted_shell', indicating whether or not the | |
6072 | shell was started in restricted mode, for use in startup files. | |
6073 | ||
6074 | b. Filename generation is now performed on the words between ( and ) in | |
6075 | array assignments (which it probably should have done all along). | |
6076 | ||
6077 | c. OLDPWD is now auto-exported, as POSIX.2 seems to require. | |
6078 | ||
6079 | d. ENV and BASH_ENV are read-only variables in a restricted shell. | |
6080 | ||
6081 | 4. New Features in Readline | |
6082 | ||
6083 | a. Many changes to the signal handling: | |
6084 | o Readline now catches SIGQUIT and cleans up the tty before returning; | |
6085 | o A new variable, rl_catch_signals, is available to application writers | |
6086 | to indicate to readline whether or not it should install its own | |
6087 | signal handlers for SIGINT, SIGTERM, SIGQUIT, SIGALRM, SIGTSTP, | |
6088 | SIGTTIN, and SIGTTOU; | |
6089 | o A new variable, rl_catch_sigwinch, is available to application | |
6090 | writers to indicate to readline whether or not it should install its | |
6091 | own signal handler for SIGWINCH, which will chain to the calling | |
6092 | applications's SIGWINCH handler, if one is installed; | |
6093 | o There is a new function, rl_free_line_state, for application signal | |
6094 | handlers to call to free up the state associated with the current | |
6095 | line after receiving a signal; | |
6096 | o There is a new function, rl_cleanup_after_signal, to clean up the | |
6097 | display and terminal state after receiving a signal; | |
6098 | o There is a new function, rl_reset_after_signal, to reinitialize the | |
6099 | terminal and display state after an application signal handler | |
6100 | returns and readline continues | |
6101 | ||
6102 | b. There is a new function, rl_resize_terminal, to reset readline's idea of | |
6103 | the screen size after a SIGWINCH. | |
6104 | ||
6105 | c. New public functions: rl_save_prompt and rl_restore_prompt. These were | |
6106 | previously private functions with a `_' prefix. | |
6107 | ||
6108 | d. New function hook: rl_pre_input_hook, called just before readline starts | |
6109 | reading input, after initialization. | |
6110 | ||
6111 | e. New function hook: rl_display_matches_hook, called when readline would | |
6112 | display the list of completion matches. The new function | |
6113 | rl_display_match_list is what readline uses internally, and is available | |
6114 | for use by application functions called via this hook. | |
6115 | ||
6116 | f. New bindable function, delete-char-or-list, like tcsh. | |
6117 | ||
6118 | ------------------------------------------------------------------------------ | |
bc4cd23c JA |
6119 | This document details the changes between this version, bash-2.02.1-release, |
6120 | and the previous version, bash-2.02-release. | |
6121 | ||
6122 | 1. Changes to Bash | |
6123 | ||
6124 | a. A bug that caused the bash readline support to not compile unless aliases | |
6125 | and csh-style history were configured into the shell was fixed. | |
6126 | ||
6127 | b. Fixed a bug that could cause a core dump when here documents contained | |
6128 | more than 1000 characters. | |
6129 | ||
6130 | c. Fixed a bug that caused a CDPATH entry of "" to not be treated the same | |
6131 | as the current directory when in POSIX mode. | |
6132 | ||
6133 | d. Fixed an alignment problem with the memory returned by the bash malloc, | |
6134 | so returned memory is now 64-bit aligned. | |
6135 | ||
6136 | e. Fixed a bug that caused command substitutions executed within pipelines | |
6137 | to put the terminal in the wrong process group. | |
6138 | ||
6139 | f. Fixes to support/config.sub for: alphas, SCO Open Server and Open Desktop, | |
6140 | Unixware 2, and Unixware 7. | |
6141 | ||
6142 | g. Fixes to the pattern matching code to make it work correctly for eight-bit | |
6143 | characters. | |
6144 | ||
6145 | h. Fixed a problem that occasionally caused the shell to display the wrong | |
6146 | value for the new working directory when changing to a directory found | |
6147 | in $CDPATH when in physical mode. | |
6148 | ||
6149 | i. Fixed a bug that caused core dumps when using conditional commands in | |
6150 | shell functions. | |
6151 | ||
6152 | j. Fixed a bug that caused the printf builtin to loop forever if the format | |
6153 | string did not consume any of the arguments. | |
6154 | ||
6155 | k. Fixed a bug in the parameter expansion code that caused "$@" to be | |
6156 | incorrectly split if $IFS did not contain a space character. | |
6157 | ||
6158 | l. Fixed a bug that could cause a core dump when completing hostnames if | |
6159 | the number of matching hostnames was an exact multiple of 16. | |
6160 | ||
6161 | m. Fixed a bug that caused the shell to fork too early when a command | |
6162 | such as `%2 &' was given. | |
6163 | ||
6164 | 2. Changes to Readline | |
6165 | ||
6166 | a. Fixed a problem with redisplay that showed up when the prompt string was | |
6167 | longer than the screen width and the prompt contained invisible characters. | |
6168 | ||
6169 | ------------------------------------------------------------------------------ | |
6170 | This document details the changes between this version, bash-2.02-release, | |
6171 | and the previous version, bash-2.02-beta2. | |
cce855bc JA |
6172 | |
6173 | 1. Changes to Bash | |
6174 | ||
6175 | a. A bug was fixed that caused the terminal process group to be set | |
6176 | incorrectly when performing command substitution of builtins in a | |
6177 | pipeline. | |
6178 | ||
6179 | ------------------------------------------------------------------------------ | |
6180 | This document details the changes between this version, bash-2.02-beta2, | |
6181 | and the previous version, bash-2.02-beta1. | |
6182 | ||
6183 | 1. Changes to Bash | |
6184 | ||
6185 | a. Attempting to `wait' for stopped jobs now generates a warning message. | |
6186 | ||
6187 | b. Pipelines which exit due to SIGPIPE in non-interactive shells are now | |
6188 | not reported if the shell is compiled -DDONT_REPORT_SIGPIPE. | |
6189 | ||
6190 | c. Some changes were made to builtins/psize.sh and support/bashbug.sh to | |
6191 | attempt to avoid some /tmp file races and surreptitious file | |
6192 | substitutions. | |
6193 | ||
6194 | d. Fixed a bug that caused the shell not to compile if configured with | |
6195 | dparen arithmetic but without aliases. | |
6196 | ||
6197 | e. Fixed a bug that caused the input stream to be switched when assigning | |
6198 | empty arrays with `bash -c'. | |
6199 | ||
6200 | f. A bug was fixed in the readline expansion glue code that caused bash to | |
6201 | dump core when expanding lines with an unclosed single quote. | |
6202 | ||
6203 | g. A fix was made to the `cd' builtin so that using a non-empty directory | |
6204 | from $CDPATH results in an absolute pathname of the new current working | |
6205 | directory to be displayed after the current directory is changed. | |
6206 | ||
6207 | h. Fixed a bug in the variable assignment code that caused the shell to | |
6208 | dump core when referencing an unset variable with `set -u' enabled in | |
6209 | an assignment statement preceding a command. | |
6210 | ||
6211 | i. Fixed a bug in the exit trap code that caused reserved words to not be | |
6212 | recognized under certain circumstances. | |
6213 | ||
6214 | j. Fixed a bug in the parameter pattern substitution code so that quote | |
6215 | removal is performed. | |
6216 | ||
6217 | k. The shell should now configure correctly on Apple Rhapsody systems. | |
6218 | ||
6219 | l. The `kill' builtin now prints a usage message if it is not passed any | |
6220 | arguments. | |
6221 | ||
6222 | ------------------------------------------------------------------------------ | |
6223 | This document details the changes between this version, bash-2.02-beta1, | |
6224 | and the previous version, bash-2.02-alpha1. | |
6225 | ||
6226 | 1. Changes to Bash | |
6227 | ||
6228 | a. A few compilation bugs were fixed in the new extended globbing code. | |
6229 | ||
6230 | b. Executing arithmetic commands now sets the command name to `((' so | |
6231 | error messages look right. | |
6232 | ||
6233 | c. Fixed some build problems with various configuration options. | |
6234 | ||
6235 | d. The `printf' builtin now aborts immediately if an illegal format | |
6236 | character is encountered. | |
6237 | ||
6238 | e. The code that creates here-documents now behaves better if the file it's | |
6239 | trying to create already exists for some reason. | |
6240 | ||
6241 | f. Fixed a problem with the extended globbing code that made patterns like | |
6242 | `x+*' expand incorrectly. | |
6243 | ||
6244 | g. The prompt string expansion code no longer quotes tildes with backslashes. | |
6245 | ||
6246 | h. The bash getcwd() implementation in lib/sh/getcwd.c now behaves better in | |
6247 | the presence of lstat(2) failures. | |
6248 | ||
6249 | i. Fixed a bug with strsub() that caused core dumps when executing `fc -s'. | |
6250 | ||
6251 | j. The mail checking code now ensures that it has a valid default mailpath. | |
6252 | ||
6253 | k. A bug was fixed that caused local variables to be unset inappropriately | |
6254 | when sourcing a script from within another sourced script. | |
6255 | ||
6256 | l. A bug was fixed in the history saving code so that functions are saved | |
6257 | in the history list correctly if `cmdhist' is enabled, but `lithist' | |
6258 | is not. | |
6259 | ||
6260 | m. A bug was fixed that caused printf overflows when displaying error | |
6261 | messages. | |
6262 | ||
6263 | n. It should be easier to build the loadble builtins in examples/loadables, | |
6264 | though some manual editing of the generated Makefile is still required. | |
6265 | ||
6266 | o. The user's primary group is now always ${GROUPS[0]}. | |
6267 | ||
6268 | p. Some updates were made to support/config.guess from the GNU master copy. | |
6269 | ||
6270 | q. Some changes were made to the autoconf support for Solaris 2.6 large | |
6271 | files. | |
6272 | ||
6273 | r. The `command' builtins now does the right thing when confstr(3) cannot | |
6274 | find a value for _CS_PATH. | |
6275 | ||
6276 | s. Extended globbing expressions like `*.!(c)' are not history expanded if | |
6277 | `extglob' is enabled. | |
6278 | ||
6279 | t. Using the `-P' option to `cd' will force the value that is assigned to | |
6280 | PWD to not contain any symbolic links. | |
6281 | ||
6282 | 2. Changes to Readline | |
6283 | ||
6284 | a. The code that prints completion listings now behaves better if one or | |
6285 | more of the filenames contains non-printable characters. | |
6286 | ||
6287 | b. The time delay when showing matching parentheses is now 0.5 seconds. | |
6288 | ||
6289 | ------------------------------------------------------------------------------ | |
6290 | This document details the changes between this version, bash-2.02-alpha1, | |
6291 | and the previous version, bash-2.01.1-release. | |
6292 | ||
6293 | 1. Changes to Bash | |
6294 | ||
6295 | a. OS-specific configuration changes for: BSD/OS 3.x, Minix 2.x, | |
6296 | Solaris 2.6, SINIX SVR4. | |
6297 | ||
6298 | b. Changes were made to the generated `info' files so that `install-info' | |
6299 | works correctly. | |
6300 | ||
6301 | c. PWD is now auto-exported. | |
6302 | ||
6303 | d. A fix was made to the pipeline code to make sure that the shell forks | |
6304 | to execute simple commands consisting solely of assignment statements. | |
6305 | ||
6306 | e. Changes to the test suite for systems with 14-character filenames. | |
6307 | ||
6308 | f. The default sizes of some internal hash tables have been made smaller | |
6309 | to reduce the shell's memory footprint. | |
6310 | ||
6311 | g. The `((...))' arithmetic command is now executed directly instead of | |
6312 | being translated into `let "..."'. | |
6313 | ||
6314 | h. Fixes were made to the expansion code so that "$*", "$@", "${array[@]}", | |
6315 | and "${array[@]}" expand correctly when IFS does not contain a space | |
6316 | character, is unset, or is set to NULL. | |
6317 | ||
6318 | i. The indirect expansion code (${!var}) was changed so that the only | |
6319 | valid values of `var' are variable names, positional parameters, `#', | |
6320 | `@', and `*'. | |
6321 | ||
6322 | j. An arithmetic expression error in a $((...)) expansion now causes a | |
6323 | non-interactive shell running in posix mode to exit. | |
6324 | ||
6325 | k. Compound array assignment now splits the words within the parentheses | |
6326 | on shell metacharacters like the parser would before expansing them | |
6327 | and performing the assignment. This is for compatibility with ksh-93. | |
6328 | ||
6329 | l. The internal shell backslash-quoting code (used in the output of `set' | |
6330 | and completion) now quotes tildes if they appear at the start of the | |
6331 | string or after a `=' or `:'. | |
6332 | ||
6333 | m. A couple of bugs with `shopt -o' were fixed. | |
6334 | ||
6335 | n. `bash +o' now displays the same output as `set +o' before starting an | |
6336 | interactive shell. | |
6337 | ||
6338 | o. A bug that caused command substitution and the `eval' builtin to | |
6339 | occasionally free memory twice when an error was encountered was fixed. | |
6340 | ||
6341 | p. The filename globbing code no longer requires read permission for a | |
6342 | directory when the filename to be matched does not contain any globbing | |
6343 | characters, as POSIX.2 specifies. | |
6344 | ||
6345 | q. A bug was fixed so that the job containing the last asynchronous | |
6346 | process is not removed from the job table until a `wait' is executed | |
6347 | for that process or another asynchronous process is started. This | |
6348 | satisfies a POSIX.2 requirement. | |
6349 | ||
6350 | r. A `select' bug was fixed so that a non-numeric user response is treated | |
6351 | the same as a numeric response that is out of range. | |
6352 | ||
6353 | s. The shell no longer parses the value of SHELLOPTS from the environment | |
6354 | if it is restricted, running setuid, or running in `privileged mode'. | |
6355 | ||
6356 | t. Fixes were made to enable large file support on systems such as | |
6357 | Solaris 2.6, where the size of a file may be larger than can be held | |
6358 | in an `int'. | |
6359 | ||
6360 | u. The filename hashing code was fixed to not add `./' to the beginning of | |
6361 | filenames which already begin with `./'. | |
6362 | ||
6363 | v. The configure script was changed so that the GNU termcap library is not | |
6364 | compiled in if `prefer-curses' has been specified. | |
6365 | ||
6366 | w. HISTCONTROL and HISTIGNORE are no longer applied to the second and | |
6367 | subsequent lines of a multi-line command. | |
6368 | ||
6369 | x. A fix was made to `disown' so that it does a better job of catching | |
6370 | out-of-range jobs. | |
6371 | ||
6372 | y. Non-interactive shells no longer report the status of processes terminated | |
6373 | due to SIGINT, even if the standard output is a terminal. | |
6374 | ||
6375 | z. A bug that caused the output of `jobs' to have extra carriage returns | |
6376 | was fixed. | |
6377 | ||
6378 | aa. A bug that caused PIPESTATUS to not be set when builtins or shell | |
6379 | functions were executed in the foreground was fixed. | |
6380 | ||
6381 | bb. Bash now attempts to detect when it is being run by sshd, and treats | |
6382 | that case identically to being run by rshd. | |
6383 | ||
6384 | cc. A bug that caused `set -a' to export SHELLOPTS when one of the shell | |
6385 | options was changed was fixed. | |
6386 | ||
6387 | dd. The `kill' builtin now disallows empty or missing process id arguments | |
6388 | instead of treating them as identical to `0', which means the current | |
6389 | process. | |
6390 | ||
6391 | ee. `var=value declare -x var' now behaves identically to | |
6392 | `var=value export var'. Similarly for `var=value declare -r var' and | |
6393 | `var=value readonly var'. | |
6394 | ||
6395 | ff. A few memory leaks were fixed. | |
6396 | ||
6397 | gg. `alias' and `unalias' now print error messages when passed an argument | |
6398 | that is not an alias for printing or deletion, even when the shell is | |
6399 | not interactive, as POSIX.2 specifies. | |
6400 | ||
6401 | hh. `alias' and `alias -p' now return a status of 0 when no aliases are | |
6402 | defined, as POSIX.2 specifes. | |
6403 | ||
6404 | ii. `cd -' now prints the pathname of the new working directory if the shell | |
6405 | is interactive. | |
6406 | ||
6407 | jj. A fix was made so that the code that binds $PWD now copes with getcwd() | |
6408 | returning NULL. | |
6409 | ||
6410 | kk. `unset' now checks whether or not a function name it's trying to unset | |
6411 | is a valid shell identifier only when the shell is running in posix mode. | |
6412 | ||
6413 | ll. A change was made to the code that generates filenames for here documents | |
6414 | to make them less prone to name collisions. | |
6415 | ||
6416 | mm. The parser was changed so that `time' is recognized as a reserved word | |
6417 | only at the beginning of a pipeline. | |
6418 | ||
6419 | nn. The pathname canonicalization code was changed so that `//' is converted | |
6420 | into `/', but all other pathnames beginning with `//' are left alone, as | |
6421 | POSIX.2 specifies. | |
6422 | ||
6423 | oo. The `logout' builtin will no longer exit a non-interactive non-login | |
6424 | shell. | |
6425 | ||
6426 | 2. Changes to Readline | |
6427 | ||
6428 | a. Fixed a problem in the readline test program rltest.c that caused a core | |
6429 | dump. | |
6430 | ||
6431 | b. The code that handles parser directives in inputrc files now displays | |
6432 | more error messages. | |
6433 | ||
6434 | c. The history expansion code was fixed so that the appearance of the | |
6435 | history comment character at the beginning of a word inhibits history | |
6436 | expansion for that word and the rest of the input line. | |
6437 | ||
6438 | 3. New Features in Bash | |
6439 | ||
6440 | a. A new version of malloc, based on the older GNU malloc, that has many | |
6441 | changes, is more page-based, is more conservative with memory usage, | |
6442 | and does not `orphan' large blocks when they are freed. | |
6443 | ||
6444 | b. A new version of gmalloc, based on the old GLIBC malloc, with many | |
6445 | changes and range checking included by default. | |
6446 | ||
6447 | c. A new implementation of fnmatch(3) that includes full POSIX.2 Basic | |
6448 | Regular Expression matching, including character classes, collating | |
6449 | symbols, equivalence classes, and support for case-insensitive pattern | |
6450 | matching. | |
6451 | ||
6452 | d. ksh-88 egrep-style extended pattern matching ([@+*?!](patlist)) has been | |
6453 | implemented, controlled by a new `shopt' option, `extglob'. | |
6454 | ||
6455 | e. There is a new ksh-like `[[' compound command, which implements | |
6456 | extended `test' functionality. | |
6457 | ||
6458 | f. There is a new `printf' builtin, implemented according to the POSIX.2 | |
6459 | specification. | |
6460 | ||
6461 | g. There is a new feature for command substitution: $(< filename) now expands | |
6462 | to the contents of `filename', with any trailing newlines removed | |
6463 | (equivalent to $(cat filename)). | |
6464 | ||
6465 | h. There are new tilde prefixes which expand to directories from the | |
6466 | directory stack. | |
6467 | ||
6468 | i. There is a new `**' arithmetic operator to do exponentiation. | |
6469 | ||
6470 | j. There are new configuration options to control how bash is linked: | |
6471 | `--enable-profiling', to allow bash to be profiled with gprof, and | |
6472 | `--enable-static-link', to allow bash to be linked statically. | |
6473 | ||
6474 | k. There is a new configuration option, `--enable-cond-command', which | |
6475 | controls whether or not the `[[' command is included. It is on by | |
6476 | default. | |
6477 | ||
6478 | l. There is a new configuration option, `--enable-extended-glob', which | |
6479 | controls whether or not the ksh extended globbing feature is included. | |
6480 | It is enabled by default. | |
6481 | ||
6482 | m. There is a new configuration #define in config.h.top that, when enabled, | |
6483 | will cause all login shells to source /etc/profile and one of the user- | |
6484 | specific login shell startup files, whether or not the shell is | |
6485 | interactive. | |
6486 | ||
6487 | n. There is a new invocation option, `--dump-po-strings', to dump | |
6488 | a shell script's translatable strings ($"...") in GNU `po' format. | |
6489 | ||
6490 | o. There is a new `shopt' option, `nocaseglob', to enable case-insensitive | |
6491 | pattern matching when globbing filenames and using the `case' construct. | |
6492 | ||
6493 | p. There is a new `shopt' option, `huponexit', which, when enabled, causes | |
6494 | the shell to send SIGHUP to all jobs when an interactive login shell | |
6495 | exits. | |
6496 | ||
6497 | q. `bind' has a new `-u' option, which takes a readline function name as an | |
6498 | argument and unbinds all key sequences bound to that function in a | |
6499 | specified keymap. | |
6500 | ||
6501 | r. `disown' now has `-a' and `-r' options, to limit operation to all jobs | |
6502 | and running jobs, respectively. | |
6503 | ||
6504 | s. The `shopt' `-p' option now causes output to be displayed in a reusable | |
6505 | format. | |
6506 | ||
6507 | t. `test' has a new `-N' option, which returns true if the filename argument | |
6508 | has been modified since it was last accessed. | |
6509 | ||
6510 | u. `umask' now has a `-p' option to print output in a reusable format. | |
6511 | ||
6512 | v. A new escape sequence, `\xNNN', has been added to the `echo -e' and $'...' | |
6513 | translation code. It expands to the character whose ascii code is NNN | |
6514 | in hexadecimal. | |
6515 | ||
6516 | w. The prompt string expansion code has a new `\r' escape sequence. | |
6517 | ||
6518 | x. The shell may now be cross-compiled for the CYGWIN32 environment on | |
6519 | a Unix machine. | |
6520 | ||
6521 | 4. New Features in Readline | |
6522 | ||
6523 | a. There is now an option for `iterative' yank-last-arg handline, so a user | |
6524 | can keep entering `M-.', yanking the last argument of successive history | |
6525 | lines. | |
6526 | ||
6527 | b. New variable, `print-completions-horizontally', which causes completion | |
6528 | matches to be displayed across the screen (like `ls -x') rather than up | |
6529 | and down the screen (like `ls'). | |
6530 | ||
6531 | c. New variable, `completion-ignore-case', which causes filename completion | |
6532 | and matching to be performed case-insensitively. | |
6533 | ||
6534 | d. There is a new bindable command, `magic-space', which causes history | |
6535 | expansion to be performed on the current readline buffer and a space to | |
6536 | be inserted into the result. | |
6537 | ||
6538 | e. There is a new bindable command, `menu-complete', which enables tcsh-like | |
6539 | menu completion (successive executions of menu-complete insert a single | |
6540 | completion match, cycling through the list of possible completions). | |
6541 | ||
6542 | f. There is a new bindable command, `paste-from-clipboard', for use on Win32 | |
6543 | systems, to insert the text from the Win32 clipboard into the editing | |
6544 | buffer. | |
6545 | ||
6546 | g. The key sequence translation code now understands printf-style backslash | |
6547 | escape sequences, including \NNN octal escapes. These escape sequences | |
6548 | may be used in key sequence definitions or macro values. | |
6549 | ||
6550 | h. An `$include' inputrc file parser directive has been added. | |
6551 | ||
6552 | ------------------------------------------------------------------------------ | |
e8ce775d JA |
6553 | This document details the changes between this version, bash-2.01.1-release, |
6554 | and the previous version, bash-2.01-release. | |
6555 | ||
6556 | 1. Changes to Bash | |
6557 | ||
6558 | a. The select command was fixed to check the validity of the user's | |
6559 | input more strenuously. | |
6560 | ||
6561 | b. A bug was fixed that prevented `time' from timing commands correctly | |
6562 | when supplied as an argument to `bash -c'. | |
6563 | ||
6564 | c. A fix was made to the mail checking code to keep from adding the same | |
6565 | mail file to the list of files to check multiple times when parsing | |
6566 | $MAILPATH. | |
6567 | ||
6568 | d. Fixed an off-by-one error in the tilde expansion library. | |
6569 | ||
6570 | e. When using the compound array assignment syntax, the old value of | |
6571 | the array is cleared before assigning the new value. | |
6572 | ||
6573 | f. Fixed a bug that could cause a core dump when a trap handler was reset | |
6574 | to the default in the trap command associated with that signal. | |
6575 | ||
6576 | g. Fixed a bug in the locale code that occurred when assigning a value | |
6577 | to LC_ALL. | |
6578 | ||
6579 | h. A change was made to the parser so that words of the form xxx=(...) | |
6580 | are not considered compound assignment statements unless there are | |
6581 | characters before the `='. | |
6582 | ||
6583 | i. A fix was made to the command tracing code to correctly quote each | |
6584 | word of output. | |
6585 | ||
6586 | j. Some changes were made to the bash-specific autoconf tests to make them | |
6587 | more portable. | |
6588 | ||
6589 | k. Completion of words with globbing characters now correctly quotes the | |
6590 | result. | |
6591 | ||
6592 | l. The directory /var/spool/mail is now preferred to /usr/spool/mail when | |
6593 | configure is deciding on the default mail directory. | |
6594 | ||
6595 | m. The brace completion code was fixed to not quote the `{' and `}'. | |
6596 | ||
6597 | n. Some fixes were made to make $RANDOM more random in subshells. | |
6598 | ||
6599 | o. System-specific changes were made to configure for: SVR4.2 | |
6600 | ||
6601 | p. Changes were made so that completion of words containing globbing chars | |
6602 | substitutes the result only if a single filename was matched. | |
6603 | ||
6604 | q. The window size is now recomputed after a job is stopped with SIGTSTP if | |
6605 | the user has set `checkwinsize' with `shopt'. | |
6606 | ||
6607 | r. When doing substring expansion, out-of-range substring specifiers now | |
6608 | cause nothing to be substituted rather than an expansion error. | |
6609 | ||
6610 | s. A fix was made so that you can no longer trap `SIGEXIT' or `SIGDEBUG' -- | |
6611 | only `EXIT' and `DEBUG' are accepted. | |
6612 | ||
6613 | t. The display of trapped signals now uses the signal number if signals | |
6614 | for which bash does not know the name are trapped. | |
6615 | ||
6616 | u. A fix was made so that `bash -r' does not turn on restricted mode until | |
6617 | after the startup files are executed. | |
6618 | ||
6619 | v. A bug was fixed that occasionally caused a core dump when a variable | |
6620 | found in the temporary environment of export/declare/readonly had a | |
6621 | null value. | |
6622 | ||
6623 | w. A bug that occasionally caused unallocated memory to be passed to free() | |
6624 | when doing arithmetic substitution was fixed. | |
6625 | ||
6626 | x. A bug that caused a buffer overrun when expanding a prompt string | |
6627 | containing `\w' and ${#PWD} exceeded PATH_MAX was fixed. | |
6628 | ||
6629 | y. A problem with the completion code that occasionally caused it to | |
6630 | refer to a character before the beginning of the readline line buffer | |
6631 | was fixed. | |
6632 | ||
6633 | z. A bug was fixed so that the `read' builtin restarts reads when | |
6634 | interrupted by signals other than SIGINT. | |
6635 | ||
6636 | aa. Fixed a bug that caused a command to be freed twice when there was | |
6637 | an evaluation error in the `eval' command. | |
6638 | ||
6639 | 2. Changes to Readline | |
6640 | ||
6641 | a. Added a missing `extern' to a declaration in readline.h that kept | |
6642 | readline from compiling cleanly on some systems. | |
6643 | ||
6644 | b. The history file is now opened with mode 0600 when it is written for | |
6645 | better security. | |
6646 | ||
6647 | c. Changes were made to the SIGWINCH handling code so that prompt redisplay | |
6648 | is done better. | |
6649 | ||
6650 | d. ^G now interrupts incremental searches correctly. | |
6651 | ||
6652 | e. A bug that caused a core dump when the set of characters to be quoted | |
6653 | when completing words was empty was fixed. | |
6654 | ||
6655 | ------------------------------------------------------------------------------ | |
d166f048 JA |
6656 | This document details the changes between this version, bash-2.01-release, |
6657 | and the previous version, bash-2.01-beta2. | |
6658 | ||
6659 | 1. Changes to Bash | |
6660 | ||
6661 | a. The `distclean' target should remove the `printenv' executable if it | |
6662 | has been created. | |
6663 | ||
6664 | b. The test suite was changed slightly to ensure that the error messages | |
6665 | are printed in English. | |
6666 | ||
6667 | c. A bug that caused the shell to dump core when a filename containing a | |
6668 | `/' was passed to `hash' was fixed. | |
6669 | ||
6670 | d. Pathname canonicalization now leaves a leading `//' intact, as POSIX.1 | |
6671 | requires. | |
6672 | ||
6673 | e. A memory leak when completing commands was fixed. | |
6674 | ||
6675 | f. A memory leak that occurred when checking the hash table for commands | |
6676 | with relative paths was fixed. | |
6677 | ||
6678 | ------------------------------------------------------------------------------ | |
6679 | This document details the changes between this version, bash-2.01-beta2, | |
6680 | and the previous version, bash-2.01-beta1. | |
6681 | ||
6682 | 1. Changes to Bash | |
6683 | ||
6684 | a. The `ulimit' builtin translates RLIM_INFINITY to the hard limit only if | |
6685 | the current (soft) limit is less than or equal to the hard limit. | |
6686 | ||
6687 | b. Fixed a bug that caused the bash emulation of strcasecmp to produce | |
6688 | incorrect results. | |
6689 | ||
6690 | c. A bug that caused memory to be freed twice when a trap handler resets | |
6691 | the trap more than once was fixed. | |
6692 | ||
6693 | d. A bug that caused machines where sizeof (pointer) > sizeof (int) to | |
6694 | fail (and possibly dump core) when trying to unwind-protect a null | |
6695 | pointer was fixed. | |
6696 | ||
6697 | e. The startup files should not be run with job control enabled. This fix | |
6698 | allows SIGINT to once again interrupt startup file execution. | |
6699 | ||
6700 | f. Bash should not change the SIGPROF handler if it is set to something | |
6701 | other than SIG_DFL. | |
6702 | ||
6703 | g. The completion code that provides bash-specific completions for readline | |
6704 | now quotes characters that the readline code would treat as word break | |
6705 | characters if they appear in a file name. | |
6706 | ||
6707 | h. The completion code now correctly quotes filenames containing a `!', | |
6708 | even if the user attempted to use double quotes when attempting | |
6709 | completion. | |
6710 | ||
6711 | i. A bug that caused the shell to dump core when `disown' was called without | |
6712 | arguments and there was no current job was fixed. | |
6713 | ||
6714 | j. A construct like $((foo);bar) is now processed as a command substitution | |
6715 | rather than as a bad arithmetic substitution. | |
6716 | ||
6717 | k. A couple of bugs that caused `fc' to not obey the `cmdhist' and `lithist' | |
6718 | shell options when editing and re-executing a series of commands were | |
6719 | fixed. | |
6720 | ||
6721 | l. A fix was made to the grammar -- the list of commands between `do' and | |
6722 | `done' in the body of a `for' command should be treated the same as a | |
6723 | while loop. | |
6724 | ||
6725 | 2. Changes to Readline | |
6726 | ||
6727 | a. A couple of bugs that caused the history search functions to attempt to | |
6728 | free a NULL pointer were fixed. | |
6729 | ||
6730 | b. If the C library provides setlocale(3), readline does not need to look | |
6731 | at various environment variables to decide whether or not to go into | |
6732 | eight-bit mode automatically -- just check whether the current locale | |
6733 | is not `C' or `POSIX'. | |
6734 | ||
6735 | c. If the filename completion function finds that a directory was not closed | |
6736 | by a previous (interrupted) completion, it closes the directory with | |
6737 | closedir(). | |
6738 | ||
6739 | 3. New Features in Bash | |
6740 | ||
6741 | a. New bindable readline commands: history-and-alias-expand-line and | |
6742 | alias-expand-line. The code was always in there, there was just no | |
6743 | way to execute it. | |
6744 | ||
6745 | ------------------------------------------------------------------------------ | |
6746 | This document details the changes between this version, bash-2.01-beta1, | |
6747 | and the previous version, bash-2.01-alpha1. | |
6748 | ||
6749 | 1. Changes to Bash | |
6750 | ||
6751 | a. Fixed a problem that could cause file descriptors used for process | |
6752 | substitution to conflict with those used explicitly in redirections. | |
6753 | ||
6754 | b. Made it easier to regenerate configure if the user changes configure.in. | |
6755 | ||
6756 | c. ${GROUPS[0]} should always be the primary group, even on systems without | |
6757 | multiple groups. | |
6758 | ||
6759 | d. Spelling correction is no longer enabled by default. | |
6760 | ||
6761 | e. Fixes to quoting problems in `bashbug'. | |
6762 | ||
6763 | f. OS-specific configuration changes were made for: Irix 6. | |
6764 | ||
6765 | g. OS-specific code changes were made for: QNX. | |
6766 | ||
6767 | h. A more meaningful message is now printed when the file in /tmp for a | |
6768 | here document cannot be created. | |
6769 | ||
6770 | i. Many changes to the shell's variable initialization code to speed | |
6771 | non-interactive startup. | |
6772 | ||
6773 | j. Changes to the non-job-control code so that it does not try to open | |
6774 | /dev/tty. | |
6775 | ||
6776 | k. The output of `set' and `export' is once again sorted, as POSIX wants. | |
6777 | ||
6778 | l. Fixed a problem caused by a recursive call reparsing the value of | |
6779 | $SHELLOPTS. | |
6780 | ||
6781 | m. The tilde code no longer calls getenv() when it's compiled as part of | |
6782 | the shell, which should eliminate problems on systems that cannot | |
6783 | redefine getenv(), like the NeXT OS. | |
6784 | ||
6785 | n. Fixed a problem that caused `bash -o' or `bash +o' to not list all | |
6786 | the shell options. | |
6787 | ||
6788 | o. Fixed `ulimit' to convert RLIM_INFINITY to the appropriate hard limit | |
6789 | only if the hard limit is greater than the current (soft) limit. | |
6790 | ||
6791 | p. Fixed a problem that arose when building bash in a different directory | |
6792 | than the source and y.tab.[ch] were remade with something other than | |
6793 | bison. This came up most often on NetBSD. | |
6794 | ||
6795 | q. Fixed a problem with completion -- it thought that `pwd`/[TAB] indicated | |
6796 | an unfinished command completion (`/), which generated errors. | |
6797 | ||
6798 | r. The bash special tilde expansions (~-, ~+) are now attempted before | |
6799 | calling the standard tilde expansion code, which should eliminate the | |
6800 | problems people have been seeing with this on Solaris 2.5.1. | |
6801 | ||
6802 | s. Added support for <stdarg.h> to places where it was missing. | |
6803 | ||
6804 | t. Changed the code that reads the output of a command substitution to not | |
6805 | go through stdio. This reduces the memory requirements and is faster. | |
6806 | ||
6807 | u. A number of changes to speed up export environment creation were made. | |
6808 | ||
6809 | v. A number of memory leaks were fixed as the result of running the test | |
6810 | scripts through Purify. | |
6811 | ||
6812 | w. Fixed a bug that caused subshells forked to interpret executable | |
6813 | scripts without a leading `#!' to not reinitialize the values of | |
6814 | the shell options. | |
6815 | ||
6816 | 2. Changes to Readline | |
6817 | ||
6818 | a. History library has less `#ifdef SHELL' code -- abstracted stuff out | |
6819 | into application-specific function hooks. | |
6820 | ||
6821 | b. Readline no longer calls getenv() if it's compiled as part of the shell, | |
6822 | which should eliminate problems on systems that cannot redefine getenv(), | |
6823 | like the NeXT OS. | |
6824 | ||
6825 | c. Fixed translation of ESC when `untranslating' macro values. | |
6826 | ||
6827 | d. The region kill operation now fixes the mark if it ends up beyond the | |
6828 | boundaries of the line after the region is deleted. | |
6829 | ||
6830 | 3. New Features in Bash | |
6831 | ||
6832 | a. New argument for `configure': `--with-curses'. This can be used to | |
6833 | override the selection of the termcap library on systems where it is | |
6834 | deficient. | |
6835 | ||
6836 | ------------------------------------------------------------------------------ | |
6837 | This document details the changes between this version, bash-2.01-alpha1, | |
6838 | and the previous version, bash-2.0-release. | |
6839 | ||
6840 | 1. Changes to Bash | |
6841 | ||
6842 | a. System-specific configuration changes for: FreeBSD, SunOS4, Irix, | |
6843 | MachTen, QNX 4.2, Harris Night Hawk, SunOS5. | |
6844 | ||
6845 | b. System-specific code changes were made for: Linux, 4.4 BSD, QNX 4.2, | |
6846 | HP-UX, AIX 4.2. | |
6847 | ||
6848 | c. A bug that caused the exec builtin to fail because the full pathname of | |
6849 | the command could not be found was fixed. | |
6850 | ||
6851 | d. The code that performs output redirections is now more resistant to | |
6852 | race conditions and possible security exploits. | |
6853 | ||
6854 | e. A bug that caused the shell to dump core when performing pattern | |
6855 | substitutions on variable values was fixed. | |
6856 | ||
6857 | f. More hosts are now recognized by the auto-configuration mechanism | |
6858 | (OpenBSD, QNX, others). | |
6859 | ||
6860 | g. Assignments to read-only variables that attempt to convert them to | |
6861 | arrays are now errors. | |
6862 | ||
6863 | h. A bug that caused shell scripts using array assignments in POSIX mode | |
6864 | to exit after the assignment was performed was fixed. | |
6865 | ||
6866 | i. The substring expansion code is now more careful about running off the | |
6867 | ends of the expanded variable value. | |
6868 | ||
6869 | j. A bug that caused completion to fail if a backquoted command substitution | |
6870 | appeared anywhere on the line was fixed. | |
6871 | ||
6872 | k. The `source' builtin no longer turns off history if it has been enabled | |
6873 | in a non-interactive shell. | |
6874 | ||
6875 | l. A bug that caused the shell to crash when `disown' was given a pid | |
6876 | instead of a job number was fixed. | |
6877 | ||
6878 | m. The `cd' spelling correction code will not try to change to `.' if no | |
6879 | directory entries match a single-character argument. | |
6880 | ||
6881 | n. A bad variable name supplied to `declare', `export', or `readonly' no | |
6882 | longer causes a non-interactive shell in POSIX mode to exit. | |
6883 | ||
6884 | o. Some fixes were made to the test suite to handle peculiarities of | |
6885 | various Unix versions. | |
6886 | ||
6887 | p. The bash completion code now quotes characters that readline would | |
6888 | treat as word breaks for completion but are not shell metacharacters. | |
6889 | ||
6890 | q. Bad options supplied at invocation now cause a usage message to be | |
6891 | displayed. | |
6892 | ||
6893 | r. Fixes were made to the code that handles DEBUG traps so that the trap | |
6894 | string is not freed inappropriately. | |
6895 | ||
6896 | s. Some changes were made to the bash debugger in examples/bashdb -- it | |
6897 | should be closer to working now. | |
6898 | ||
6899 | t. A problem that caused the default filename used for mail checking to be | |
6900 | wrong was fixed. | |
6901 | ||
6902 | u. A fix was made to the `echo' builtin so that NUL characters printed with | |
6903 | `echo -e' do not cause the output to be truncated. | |
6904 | ||
6905 | v. A fix was made to the job control code so that the shell behaves better | |
6906 | when monitor mode is enabled in a non-interactive shell. | |
6907 | ||
6908 | w. Bash no longer catches all of the terminating signals in a non- | |
6909 | interactive shell until a trap is set on EXIT, which should result in | |
6910 | quicker startup. | |
6911 | ||
6912 | x. A fix was made to the command timing code so that `time' can be used in | |
6913 | a loop. | |
6914 | ||
6915 | y. A fix was made to the parser so that `((cmd); cmd2)' is now parsed as | |
b72432fd | 6916 | a nested subshell rather than strictly as an (erroneous) arithmetic |
d166f048 JA |
6917 | command. |
6918 | ||
6919 | z. A fix was made to the globbing code so that it correctly matches quoted | |
6920 | filenames beginning with a `.'. | |
6921 | ||
6922 | aa. A bug in `fc' that caused some multi-line commands to not be stored as | |
6923 | one command in the history when they were re-executed after editing | |
6924 | (with `fc -e') was fixed. | |
6925 | ||
6926 | bb. The `ulimit' builtin now attempts to catch some classes of integer | |
6927 | overflows. | |
6928 | ||
6929 | cc. The command-oriented-history code no longer attempts to add `;' | |
6930 | inappropriately when a newline appears while reading a $(...) command | |
6931 | substitution. | |
6932 | ||
6933 | dd. A bug that caused the shell to dump core when `help --' was executed | |
6934 | was fixed. | |
6935 | ||
6936 | ee. A bug that caused the shell to crash when an unset variable appeared | |
6937 | in the body of a here document after `set -u' had been executed was | |
6938 | fixed. | |
6939 | ||
6940 | ff. Implicit input redirections from /dev/null for asynchronous commands | |
6941 | are now handled better. | |
6942 | ||
6943 | gg. A bug that caused the shell to fail to compile when configured with | |
6944 | `--disable-readline' was fixed. | |
6945 | ||
6946 | hh. The globbing code should now be interruptible. | |
6947 | ||
6948 | ii. Bash now notices when the `kill' builtin is used to send SIGCONT to a | |
6949 | stopped job and adjusts the data structures accordingly, as if `bg' had | |
6950 | been executed instead. | |
6951 | ||
6952 | jj. A bug that caused the shell to crash when mixing calls to `getopts' | |
6953 | and `shift' on the same set of positional parameters was fixed. | |
6954 | ||
6955 | kk. The command printing code now preserves the `-p' flag to `time'. | |
6956 | ||
6957 | ll. The command printing code now handles here documents better when there | |
6958 | are other redirections associated with the command. | |
6959 | ||
6960 | mm. The special glibc environment variable (NNN_GNU_nonoption_argv_flags_) | |
6961 | is no longer placed into the environment of executed commands -- users | |
6962 | of glibc had too many problems with it. | |
6963 | ||
6964 | nn. Reorganized the code that generates signames.h. The signal_names list | |
6965 | is now more complete but may be slightly different (SIGABRT is favored | |
6966 | over SIGIOT, for example). The preferred signal names are those | |
6967 | listed in the POSIX.2 standard. | |
6968 | ||
6969 | oo. `bashbug' now uses a filename shorter than 14 characters for its | |
6970 | temporary file, and asks for confirmation before sending the bug | |
6971 | report. | |
6972 | ||
6973 | pp. A bug that caused TAB completion in vi editing mode to not be turned | |
6974 | off when `set -o posix' was executed or back on when `set +o posix' | |
6975 | was executed was fixed. | |
6976 | ||
6977 | qq. A bug in the brace expansion code that caused brace expansions appearing | |
6978 | in new-style $(...) command substitutions to be inappropriately expanded | |
6979 | was fixed. | |
6980 | ||
6981 | rr. A bug in the readline hook shell-expand-line that could cause memory to | |
6982 | be inappropriately freed was fixed. | |
6983 | ||
6984 | ss. A bug that caused some arithmetic expressions containing `&&' and `||' | |
6985 | to be parsed with the wrong precedence has been fixed. | |
6986 | ||
6987 | tt. References to unbound variables after `set -u' has been executed now | |
6988 | cause the shell to exit immediately, as they should. | |
6989 | ||
6990 | uu. A bug that caused the shell to exit inappropriately when `set -e' had | |
6991 | been executed and a command's return status was being inverted with the | |
6992 | `!' reserved word was fixed. | |
6993 | ||
6994 | vv. A bug that could occasionally cause the shell to crash with a | |
6995 | divide-by-zero error when timing a command was fixed. | |
6996 | ||
6997 | ww. A bug that caused parameter pattern substitution to leave stray | |
6998 | backslashes in the replacement string when the expression is in | |
6999 | double quotes was fixed. | |
7000 | ||
7001 | xx. The `break' and `continue' builtins now break out of all loops when an | |
7002 | invalid count argument is supplied. | |
7003 | ||
7004 | yy. Fixed a bug that caused PATH to be set to the empty string if | |
7005 | `command -p' is executed with PATH unset. | |
7006 | ||
7007 | zz. Fixed `kill -l signum' to print the signal name without the `SIG' prefix, | |
7008 | as POSIX specifies. | |
7009 | ||
7010 | aaa. Fixed a bug that caused the shell to crash while setting $SHELLOPTS | |
7011 | if there were no shell options set. | |
7012 | ||
7013 | bbb. Fixed `export -p' and `readonly -p' so that when the shell is in POSIX | |
7014 | mode, their output is as POSIX.2 specifies. | |
7015 | ||
7016 | ccc. Fixed a bug in `readonly' so that `readonly -a avar=(...)' actually | |
7017 | creates an array variable. | |
7018 | ||
7019 | ddd. Fixed a bug that prevented `time' from correctly timing background | |
7020 | pipelines. | |
7021 | ||
7022 | 2. Changes to Readline | |
7023 | ||
7024 | a. A bug that caused an extra newline to be printed when the cursor was on | |
7025 | an otherwise empty line was fixed. | |
7026 | ||
7027 | b. An instance of memory being used after it was freed was corrected. | |
7028 | ||
7029 | c. The redisplay code now works when the prompt is longer than the screen | |
7030 | width. | |
7031 | ||
7032 | d. `dump-macros' is now a bindable name, as it should have been all along. | |
7033 | ||
7034 | e. Non-printable characters are now expanded when displaying macros and | |
7035 | their values. | |
7036 | ||
7037 | f. The `dump-variables' and `dump-macros' commands now output a leading | |
7038 | newline if they're called as the result of a key sequence, rather | |
7039 | than directly by an application. | |
7040 | ||
7041 | 3. New Features in Bash | |
7042 | ||
7043 | a. There is a new builtin array variable: GROUPS, the set of groups to which | |
7044 | the user belongs. This is used by the test suite. | |
7045 | ||
7046 | 4. New Features in Readline | |
7047 | ||
7048 | a. If a key sequence bound to `universal-argument' is read while reading a | |
7049 | numeric argument started with `universal-argument', it terminates the | |
7050 | argument but is otherwise ignored. This provides a way to insert multiple | |
7051 | instances of a digit string, and is how GNU emacs does it. | |
7052 | ||
7053 | ------------------------------------------------------------------------------ | |
ccc6cda3 JA |
7054 | This document details the changes between this version, bash-2.0-release, |
7055 | and the previous version, bash-2.0-beta3. | |
7056 | ||
7057 | 1. Changes to Bash | |
7058 | ||
7059 | a. Fix to the `getopts' builtin so that it does the right thing when a | |
7060 | required option argument is not present. | |
7061 | ||
7062 | b. The completion code now updates the common prefix of matched names | |
7063 | after FIGNORE processing is done, since any names that were removed | |
7064 | may have changed the common prefix. | |
7065 | ||
7066 | c. Fixed a bug that made messages in MAILPATH entries not work correctly. | |
7067 | ||
7068 | d. Fixed a serious documentation error in the description of the new | |
7069 | ${parameter:offset[:length]} expansion. | |
7070 | ||
7071 | e. Fixes to make parameter substring expansion ({$param:offset[:length]}) | |
7072 | work when within double quotes. | |
7073 | ||
7074 | f. Fixes to make ^A (CTLESC) survive an unquoted expansion of positional | |
7075 | parameters. | |
7076 | ||
7077 | g. Corrected a misspelling of `unlimited' in the output of `ulimit'. | |
7078 | ||
7079 | h. Fixed a bug that caused executable scripts without a leading `#!' to | |
7080 | occasionally pick up the wrong set of positional parameters. | |
7081 | ||
7082 | i. Linux systems now have a working `ulimit -v', using RLIMIT_AS. | |
7083 | ||
7084 | j. Updated config.guess so that many more machine types are recognized. | |
7085 | ||
7086 | k. Fixed a bug with backslash-quoted slashes in the ${param/pat[/sub]} | |
7087 | expansion. | |
7088 | ||
7089 | l. If the shell is named `-su', and `-c command' is supplied, read and | |
7090 | execute the login shell startup files even though the shell is not | |
7091 | interactive. This is to support the `-' option to `su'. | |
7092 | ||
7093 | m. Fixed a bug that caused core dumps when the DEBUG trap was ignored | |
7094 | with `trap "" DEBUG' and a shell function was subsequently executed. | |
7095 | ||
7096 | n. Fixed a bug that caused core dumps in the read builtin when IFS was | |
7097 | set to the null string and the input had leading whitespace. | |
7098 | ||
7099 | 2. Changes to Readline | |
7100 | ||
7101 | a. Fixed a bug that caused a numeric argument of 1024 to be ignored when | |
7102 | inserting text. | |
7103 | ||
7104 | b. Fixed the display code so that the numeric argument is displayed as it's | |
7105 | being entered. | |
7106 | ||
7107 | c. Fixed the numeric argument reading code so that `M-- command' is | |
7108 | equivalent to `M--1 command', as the prompt implies. | |
7109 | ||
7110 | 3. New Features in Bash | |
7111 | ||
7112 | a. `ulimit' now sets both hard and soft limits and reports the soft limit | |
7113 | by default (when neither -H nor -S is specified). This is compatible | |
7114 | with versions of sh and ksh that implement `ulimit'. | |
7115 | ||
7116 | b. Integer constants have been extended to base 64. | |
7117 | ||
7118 | 4. New Features in Readline | |
7119 | ||
7120 | a. The `home' and `end' keys are now bound to beginning-of-line and | |
7121 | end-of-line, respectively, if the corresponding termcap capabilities | |
7122 | are present. | |
7123 | ||
7124 | ------------------------------------------------------------------------------ | |
7125 | This document details the changes between this version, bash-2.0-beta3, | |
7126 | and the previous version, bash-2.0-beta2. | |
7127 | ||
7128 | 1. Changes to Bash | |
7129 | ||
7130 | a. System-specific changes for: AIX 4.2, SCO 3.2v[45], HP-UX. | |
7131 | ||
7132 | b. When in POSIX mode, variable assignments preceding a special builtin | |
7133 | persist in the shell environment after the builtin completes. | |
7134 | ||
7135 | c. Changed all calls to getwd() to getcwd(). Improved check for systems | |
7136 | where the libc getcwd() calls popen(), since that breaks on some | |
7137 | systems when job control is being used. | |
7138 | ||
7139 | d. Fixed a bug that caused seg faults when executing scripts with the | |
7140 | execute bit set but without a leading `#!'. | |
7141 | ||
7142 | e. The environment passed to executed commands is never sorted. | |
7143 | ||
7144 | f. A bug was fixed in the code that expands ${name[@]} to the number of | |
7145 | elements in an array variable. | |
7146 | ||
7147 | g. A bug was fixed in the array compound assignment code ( A=( ... ) ). | |
7148 | ||
7149 | h. Window size changes now correctly propagate down to readline if | |
7150 | the shopt `checkwinsize' option is enabled. | |
7151 | ||
7152 | i. A fix was made in the code that expands to the length of a variable | |
7153 | value (${#var}). | |
7154 | ||
7155 | j. A fix was made to the command builtin so that it did not turn on the | |
7156 | `no fork' flag inappropriately. | |
7157 | ||
7158 | k. A fix was made to make `set -n' work more reliably. | |
7159 | ||
7160 | l. A fix was made to the job control initialization code so that the | |
7161 | terminal process group is set to the shell's process group if the | |
7162 | shell changes its own process group. | |
7163 | ||
7164 | 2. Changes to Readline | |
7165 | ||
7166 | a. System-specific changes for: SCO 3.2v[45]. | |
7167 | ||
7168 | b. The behavior of the vi-mode `.' when redoing an `i' command was changed | |
7169 | to insert the text previously inserted by the `i' command rather than | |
7170 | simply entering insert mode. | |
7171 | ||
7172 | 3. New features in Bash | |
7173 | ||
7174 | a. There is a new version of the autoload function package, in | |
7175 | examples/functions/autoload.v2, that uses arrays and provides more | |
7176 | functionality. | |
7177 | ||
7178 | b. Support for LC_COLLATE and locale-specific sorting of the results of | |
7179 | pathname expansion if strcoll() is available. | |
7180 | ||
7181 | 4. New Features in Readline | |
7182 | ||
7183 | a. Support for locale-specific sorting of completion possibilities if | |
7184 | strcoll() is available. | |
7185 | ||
7186 | ------------------------------------------------------------------------------ | |
7187 | This document details the changes between this version, bash-2.0-beta2, | |
7188 | and the previous version, bash-2.0-beta1. | |
7189 | ||
7190 | 1. Changes to Bash | |
7191 | ||
7192 | a. `pushd -' is once again equivalent to `pushd $OLDPWD'. | |
7193 | ||
7194 | b. OS-specific changes for: SCO 3.2v[45]. | |
7195 | ||
7196 | c. A change was made to the fix for the recently-reported security hole | |
7197 | when reading characters with octal value 255 to make it work better on | |
7198 | systems with restartable system calls when not using readline. | |
7199 | ||
7200 | d. Some changes were made to the test suite so that it works if you | |
7201 | configure bash with --enable-usg-echo-default. | |
7202 | ||
7203 | e. A fix was made to the parsing of conditional arithmetic expressions. | |
7204 | ||
7205 | f. Illegal arithmetic bases now cause an arithmetic evaluation error rather | |
7206 | than being silently reset. | |
7207 | ||
7208 | g. Multiple arithmetic bases now cause an arithmetic evaluation error | |
7209 | instead of being ignored. | |
7210 | ||
7211 | h. A fix was made to the evaluation of ${param?word} to conform to POSIX.2. | |
7212 | ||
7213 | i. A bug that sometimes caused array indices to be evaluated twice (which | |
7214 | would cause errors when they contained assignment statements) was fixed. | |
7215 | ||
7216 | j. `ulimit' was rewritten to avoid problems with getrlimit(2) returning | |
7217 | unsigned values and to simplify the code. | |
7218 | ||
7219 | k. A bug in the command-oriented-history code that caused it to sometimes | |
7220 | put semicolons after right parens inappropriately was fixed. | |
7221 | ||
7222 | l. The values inserted into the prompt by the \w and \W escape sequences | |
7223 | are now quoted to prevent further expansion. | |
7224 | ||
7225 | m. An interactive shell invoked as `sh' now reads and executes commands | |
7226 | from the file named by $ENV when it starts up. If it's a login shell, | |
7227 | it does this after reading /etc/profile and ~/.profile. | |
7228 | ||
7229 | n. The file named by $ENV is never read by non-interactive shells. | |
7230 | ||
7231 | 2. Changes to Readline | |
7232 | ||
7233 | a. A few changes were made to hide some macros and functions that should not | |
7234 | be public. | |
7235 | ||
7236 | b. An off-by-one error that caused seg faults in the history expansion code | |
7237 | was fixed. | |
7238 | ||
7239 | 3. New Features in Bash | |
7240 | ||
7241 | a. The ksh-style ((...)) arithmetic command was implemented. It is exactly | |
7242 | identical to let "...". This is controlled by a new option to configure, | |
7243 | `--enable-dparen-arithmetic', which is on by default. | |
7244 | ||
7245 | b. There is a new #define available in config.h.top: SYS_BASH_LOGOUT. If | |
7246 | defined to a filename, bash reads and executes commands from that file | |
7247 | when a login shell exits. It's commented out by default. | |
7248 | ||
7249 | c. `ulimit' has a `-l' option that reports the maximum amount of data that | |
7250 | may be locked into memory on 4.4BSD-based systems. | |
7251 | ||
7252 | ------------------------------------------------------------------------------ | |
7253 | This document details the changes between this version, bash-2.0-beta1, | |
7254 | and the previous version, bash-2.0-alpha4. | |
7255 | ||
7256 | 1. Changes to Bash | |
7257 | ||
7258 | a. A bug that sometimes caused traps to be ignored on signals the | |
7259 | shell treats specially was fixed. | |
7260 | ||
7261 | b. The internationalization code was changed to track the values of | |
7262 | LC_* variables and call setlocale() as appropriate. The TEXTDOMAIN | |
7263 | and TEXTDOMAINDIR variables are also tracked; changes cause calls | |
7264 | to textdomain() and bindtextdomain(), if available. | |
7265 | ||
7266 | c. A bug was fixed that sometimes caused double-quoted strings to be | |
7267 | parsed incorrectly. | |
7268 | ||
7269 | d. Changes were made so that the siglist code compiles correctly on | |
7270 | Solaris 2.5. | |
7271 | ||
7272 | e. Added `:' to the set of characters that cause word breaks for the | |
7273 | completion code so that pathnames in assignments to $PATH can be | |
7274 | completed. | |
7275 | ||
7276 | f. The `select' command was fixed to print $PS3 to stderr. | |
7277 | ||
7278 | g. Fixed an error in the manual page section describing the effect that | |
7279 | setting and unsetting GLOBIGNORE has on the setting of the `dotglob' | |
7280 | option. | |
7281 | ||
7282 | h. The time conversion code now uses CLK_TCK rather than CLOCKS_PER_SEC | |
7283 | on systems without gettimeofday() and resources. | |
7284 | ||
7285 | i. The getopt static variables are now initialized each time a subshell | |
7286 | is started, so subshells using `getopts' work right. | |
7287 | ||
7288 | j. A sign-extension bug that caused a possible security hole was fixed. | |
7289 | ||
7290 | k. The parser now reads characters between backquotes within a double- | |
7291 | quoted string as a single word, so double quotes in the backquoted | |
7292 | string don't terminate the enclosing double-quoted string. | |
7293 | ||
7294 | l. A bug that caused `^O' to work incorrectly when typed as the first | |
7295 | thing to an interactive shell was fixed. | |
7296 | ||
7297 | m. A rarely-exercised off-by-one error in the code that quotes variable | |
7298 | values was fixed. | |
7299 | ||
7300 | n. Some memory and file descriptor leaks encountered when running a | |
7301 | shell script that is executable but does not have a leading `#!' | |
7302 | were plugged. | |
7303 | ||
7304 | 2. Changes to Readline | |
7305 | ||
7306 | a. A bug that sometimes caused incorrect results when trying to read | |
7307 | typeahead on systems without FIONREAD was fixed. | |
7308 | ||
7309 | 3. New Features in Bash | |
7310 | ||
7311 | a. The command timing code now uses the value of the TIMEFORMAT variable | |
7312 | to format and display timing statistics. | |
7313 | ||
7314 | b. The `time' reserved word now accepts a `-p' option to force the | |
7315 | POSIX.2 output format. | |
7316 | ||
7317 | c. There are a couple of new and updated scripts to convert csh startup | |
7318 | files to bash format. | |
7319 | ||
7320 | d. There is a new builtin array variable: BASH_VERSINFO. The various | |
7321 | members hold the parts of the version information in BASH_VERSION, | |
7322 | plus the value of MACHTYPE. | |
7323 | ||
7324 | 4. New Features in Readline | |
7325 | ||
7326 | a. Setting LANG to `en_US.ISO8859-1' now causes readline to enter | |
7327 | eight-bit mode. | |
7328 | ||
7329 | ------------------------------------------------------------------------------ | |
7330 | This document details the changes between this version, bash-2.0-alpha4, | |
7331 | and the previous version, bash-2.0-alpha3. | |
7332 | ||
7333 | 1. Changes to Bash | |
7334 | ||
7335 | a. There is better detection of rsh connections on Solaris 2. | |
7336 | ||
7337 | b. Assignments to read-only variables preceding a command name are now | |
7338 | variable assignment errors. Variable assignment errors cause | |
7339 | non-interactive shells running in posix mode to exit. | |
7340 | ||
7341 | c. The word tokenizer was rewritten to handle nested quotes and pairs | |
7342 | ('', "", ``, ${...}, $(...), $[...], $'...', $"...", <(...), >(...)) | |
7343 | correctly. Some of the parameter expansion code was updated as a | |
7344 | consequence. | |
7345 | ||
7346 | d. A fix was made to `test' when given three arguments so that a binary | |
7347 | operator is checked for first, before checking that the first argument | |
7348 | is `!'. | |
7349 | ||
7350 | e. 2''>/dev/null is no longer equivalent to 2>/dev/null. | |
7351 | ||
7352 | f. Parser error messages were regularized, and in most cases the name of | |
7353 | the shell script being read by a non-interactive shell is not printed | |
7354 | twice. | |
7355 | ||
7356 | g. A fix was made to the completion code so that it no longer removes the | |
7357 | text the user typed in some cases. | |
7358 | ||
7359 | h. The special glibc `getopt' environment variable is no longer put into | |
7360 | the environment on machines with small values of ARG_MAX. | |
7361 | ||
7362 | i. The expansion of ${...} now follows the POSIX.2 rules for finding the | |
7363 | closing `}'. | |
7364 | ||
7365 | j. The shell no longer displays spurious status messages for background | |
7366 | jobs in shell scripts that complete successfully when the script is | |
7367 | run from a terminal. | |
7368 | ||
7369 | k. `shopt -o' now correctly updates $SHELLOPTS. | |
7370 | ||
7371 | l. A bug that caused the $PATH searching code to return a non-executable | |
7372 | file even when an executable file with the same name appeared later in | |
7373 | $PATH was fixed. | |
7374 | ||
7375 | m. The shell now does tilde expansions on unquoted `:~' in assignment | |
7376 | statements when not in posix mode. | |
7377 | ||
7378 | n. Variable assignment errors when a command consists only of assignments | |
7379 | now cause non-interactive shells to exit when in posix mode. | |
7380 | ||
7381 | o. If the variable in a `for' or `select' command is read-only, or not a | |
7382 | legal shell identifier, a variable assignment error occurs. | |
7383 | ||
7384 | p. `test' now handles `-a' and `-o' as binary operators when three arguments | |
7385 | are supplied, and correctly parses `( word )' as equivalent to `word'. | |
7386 | ||
7387 | q. `test' was fixed so that file names of the form /dev/fd/NN mean the same | |
7388 | thing on all systems, even Linux. | |
7389 | ||
7390 | r. Fixed a bug in the globbing code that caused patterns with multiple | |
7391 | consecutive `*'s to not be matched correctly. | |
7392 | ||
7393 | s. Fixed a bug that caused $PS2 to not be printed when an interactive shell | |
7394 | not using readline is reading a here document. | |
7395 | ||
7396 | t. Fixed a bug that caused history expansion to be performed inappropriately | |
7397 | when a single-quoted string spanned more than one line. | |
7398 | ||
7399 | u. `getopts' now checks that the variable name passed by the user as the | |
7400 | second argument is a legal shell identifier and that the variable is | |
7401 | not read-only. | |
7402 | ||
7403 | v. Fixed `getopts' to obey POSIX.2 rules for setting $OPTIND when it | |
7404 | encounters an error. | |
7405 | ||
7406 | w. Fixed `set' to display variable values in a form that can be re-read. | |
7407 | ||
7408 | x. Fixed a bug in the code that keeps track of whether or not local variables | |
7409 | have been declared at the current level of function nesting. | |
7410 | ||
7411 | y. Non-interactive shells in posix mode now exit if the name in a function | |
7412 | declaration is not a legal identifier. | |
7413 | ||
7414 | z. The job control code now ignores stopped children when the shell is not | |
7415 | interactive. | |
7416 | ||
7417 | aa. The `cd' builtin no longer attempts spelling correction on the directory | |
7418 | name if the shell is not interactive, regardless of the setting of the | |
7419 | `cdspell' option. | |
7420 | ||
7421 | bb. Some OS-specific changes were made for SCO 3.2v[45] and AIX 4.2. | |
7422 | ||
7423 | cc. `time' now prints its output to stderr, as POSIX.2 specifies. | |
7424 | ||
7425 | 2. Fixes to Readline | |
7426 | ||
7427 | a. After printing possible completions, all lines of a multi-line prompt | |
7428 | are redisplayed. | |
7429 | ||
7430 | b. Some changes were made to the terminal handling code in rltty.c to | |
7431 | work around AIX 4.2 bugs. | |
7432 | ||
7433 | 3. New Features in Bash | |
7434 | ||
7435 | a. There is a new loadable builtin: sprintf, with calling syntax | |
7436 | sprintf var format [args] | |
7437 | This provides an easy way to simulate ksh left- and right-justified | |
7438 | variable values. | |
7439 | ||
7440 | b. The expansions of \h and \H in prompt strings were swapped. \h now | |
7441 | expands to the hostname up to the first `.', as in bash-1.14. | |
7442 | ||
7443 | 4. New Features in Readline | |
7444 | ||
7445 | a. The bash-1.14 behavior when ^M is typed while doing an incremental | |
7446 | search was restored. ^J may now be used to terminate the search without | |
7447 | accepting the line. | |
7448 | ||
7449 | b. There is a new bindable variable: disable-completion. This inhibits | |
7450 | word completion and causes the completion character to be inserted as | |
7451 | if it had been bound to self-insert. | |
7452 | ||
7453 | ------------------------------------------------------------------------------ | |
7454 | This document details the changes between this version, bash-2.0-alpha3, | |
7455 | and the previous version, bash-2.0-alpha2. | |
7456 | ||
7457 | There is now a file `COMPAT' included in the distribution that lists the | |
7458 | user-visible incompatibilities between 1.14 and 2.0. | |
7459 | ||
7460 | 1. Changes to Bash | |
7461 | ||
7462 | a. Some work was done so that word splitting of the rhs of assignment | |
7463 | statements conforms more closely to historical practice. | |
7464 | ||
7465 | b. A couple of errant memory frees were fixed. | |
7466 | ||
7467 | c. A fix was made to the test builtin so it recognizes `<' and `>' as | |
7468 | binary operators. | |
7469 | ||
7470 | d. The GNU malloc in lib/malloc/malloc.c now scrambles memory as it's | |
7471 | allocated and freed. This is to catch callers that refer to freed | |
7472 | memory or assume something about newly-allocated memory. | |
7473 | ||
7474 | e. Fixed a problem with conversion to 12-hour time in the prompt | |
7475 | expansion code. | |
7476 | ||
7477 | f. Fixed a problem with configure's argument parsing order. Now you can | |
7478 | correctly turn on specific options after using --enable-minimal-config. | |
7479 | ||
7480 | g. The configure script now automatically disables the use of GNU malloc | |
7481 | on systems where it's appropriate (better than having people read the | |
7482 | NOTES file and do it manually). | |
7483 | ||
7484 | h. There are new prompt expansions (\v and \V) to insert version information | |
7485 | into the prompt strings. | |
7486 | ||
7487 | i. The default prompt string now includes the version number. | |
7488 | ||
7489 | j. Most of the builtins that take no options were changed to use the | |
7490 | internal getopt so they can produce proper error messages for -? | |
7491 | and incorrect options. | |
7492 | ||
7493 | k. Some system-specific changes were made for SVR4.2 and Solaris 2.5. | |
7494 | ||
7495 | l. Bash now uses PATH_MAX instead of MAXPATHLEN and NAME_MAX instead of | |
7496 | MAXNAMLEN. | |
7497 | ||
7498 | m. A couple of problems caused by uninitialized variables were fixed. | |
7499 | ||
7500 | n. There are a number of new loadable builtin examples: logname, basename, | |
7501 | dirname, tty, pathchk, tee, head, and rmdir. All of these conform to | |
7502 | POSIX.2. | |
7503 | ||
7504 | o. Bash now notices changes in TZ and calls tzset() if present, so | |
7505 | changing TZ will alter the time printed by prompt expansions. | |
7506 | ||
7507 | p. The source was reorganized a bit so I don't have to wait so long for | |
7508 | some files to compile, and to facilitate the creation of a `shell | |
7509 | library' at some future point. | |
7510 | ||
7511 | q. Bash no longer turns off job control if called as `sh', since the | |
7512 | POSIX.2 spec includes job control as a standard feature. | |
7513 | ||
7514 | r. `bash -o posix' now works as intended. | |
7515 | ||
7516 | s. Fixed a problem with the completion code: when completing a filename | |
7517 | that contained globbing characters, if show-all-if-ambiguous was set, | |
7518 | the completion code would remove the user's text. | |
7519 | ||
7520 | t. Fixed ulimit so that (hopefully) the full range of limits is available | |
7521 | on HPUX systems. | |
7522 | ||
7523 | u. A new `shopt' option (`hostcomplete') enables and disables hostname | |
7524 | completion. | |
7525 | ||
7526 | v. The shell no longer attempts to save the history on an abort(), | |
7527 | which is usually called by programming_error(). | |
7528 | ||
7529 | w. The `-s' option to `fc' was changed to echo the command to be executed | |
7530 | to stderr instead of stdout. | |
7531 | ||
7532 | x. If the editor invoked by `fc -e' exits with a non-zero status, no | |
7533 | commands are executed. | |
7534 | ||
7535 | y. Fixed a bug that made the shopt `histverify' option work incorrectly. | |
7536 | ||
7537 | z. There is a new variable `MACHTYPE' whose value is the GNU-style | |
7538 | `cpu-company-system' system description as set by configure. (The | |
7539 | values of MACHTYPE and HOSTTYPE should really be swapped.) | |
7540 | ||
7541 | aa. The `ulimit' builtin now allows the maximum virtual memory size to be | |
7542 | set via setrlimit(2) if RLIMIT_VMEM is defined. | |
7543 | ||
7544 | bb. `bash -nc 'command'' no longer runs `command'. | |
7545 | ||
7546 | 2. Changes to Readline | |
7547 | ||
7548 | a. Fixed a typo in the code that checked for FIONREAD in input.c. | |
7549 | ||
7550 | b. Fixed a bug in the code that outputs keybindings, so things like C-\ | |
7551 | are quoted properly. | |
7552 | ||
7553 | c. Fixed a bug in the inputrc file parsing code to handle the problems | |
7554 | caused by inputrc files created from the output of `bind -p' in | |
7555 | previous versions of bash. The problem was due to the bug fixed | |
7556 | in item b above. | |
7557 | ||
7558 | d. Readline no longer turns off the terminal's meta key, and turns it on | |
7559 | once the first time it's called. | |
7560 | ||
7561 | ------------------------------------------------------------------------------ | |
7562 | This file documents the changes between this version, bash-2.0-alpha2, | |
7563 | and the previous version, bash-2.0-alpha. | |
7564 | ||
7565 | 1. Changes to Bash | |
7566 | ||
7567 | a. The shell no longer thinks directories are executable. | |
7568 | ||
7569 | b. `disown' has a new option, `h', which inhibits the resending of SIGHUP | |
7570 | but does not remove the job from the jobs table. | |
7571 | ||
7572 | c. The varargs functions in error.c now use ANSI-C `stdarg' if available. | |
7573 | ||
7574 | d. The build process now treats the `build version' in .build as local to | |
7575 | the build directory, so different versions built from the same source | |
7576 | tree have different `build versions'. | |
7577 | ||
7578 | e. Some problems with the grammar have been fixed. (It used `list' in a few | |
7579 | productions where `compound_list' was needed. A `list' must be terminated | |
7580 | with a newline or semicolon; a `compound_list' need not be.) | |
7581 | ||
7582 | f. A fix was made to keep `wait' from hanging when waiting for all background | |
7583 | jobs. | |
7584 | ||
7585 | g. `bash --help' now writes its output to stdout, like the GNU Coding Standards | |
7586 | specify, and includes the machine type (the value of MACHTYPE). | |
7587 | ||
7588 | h. `bash --version' now prints more information and exits successfully, like | |
7589 | the GNU Coding Standards specify. | |
7590 | ||
7591 | i. The output of `time' and `times' now prints fractional seconds with three | |
7592 | places after the decimal point. | |
7593 | ||
7594 | j. A bug that caused process substitutions to screw up the pipeline printed | |
7595 | by `jobs' was fixed. | |
7596 | ||
7597 | k. Fixes were made to the code that implements $'...' and $"..." so they | |
7598 | work as documented. | |
7599 | ||
7600 | l. The process substitution code now opens named pipes for reading with | |
7601 | O_NONBLOCK to avoid hanging. | |
7602 | ||
7603 | m. Fixes were made to the trap code so the shell cleans up correctly if the | |
7604 | trap command contains a `return' and we're executing a function or | |
7605 | sourcing a script with `.'. | |
7606 | ||
7607 | n. Fixes to doc/Makefile.in so that it doesn't try to remake all of the | |
7608 | documentation (ps, dvi, etc.) on a `make install'. | |
7609 | ||
7610 | o. Fixed an auto-increment error that caused bash -c args to sometimes dump | |
7611 | core. | |
7612 | ||
7613 | p. Fixed a bug that caused $HISTIGNORE to fail when the history line | |
7614 | contained globbing characters. | |
7615 | ||
7616 | 2. Changes to Readline | |
7617 | ||
7618 | a. There is a new string variable, rl_library_version, available for use by | |
7619 | applications. The current value is "2.1". | |
7620 | ||
7621 | b. A bug encountered when expand-tilde was enabled and file completion was | |
7622 | attempted on a word beginning with `~/' was fixed. | |
7623 | ||
7624 | c. A slight change was made to the incremental search termination behavior. | |
7625 | ESC still terminates the search, but if input is pending or arrives | |
7626 | within 0.1 seconds (on systems with select(2)), it is used as a prefix | |
7627 | character. This is intented to allow users to terminate searches with | |
7628 | the arrow keys and get the behavior they expect. |