1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
|
This document details the changes between this version, bash-2.01.1-release,
and the previous version, bash-2.01-release.
1. Changes to Bash
a. The select command was fixed to check the validity of the user's
input more strenuously.
b. A bug was fixed that prevented `time' from timing commands correctly
when supplied as an argument to `bash -c'.
c. A fix was made to the mail checking code to keep from adding the same
mail file to the list of files to check multiple times when parsing
$MAILPATH.
d. Fixed an off-by-one error in the tilde expansion library.
e. When using the compound array assignment syntax, the old value of
the array is cleared before assigning the new value.
f. Fixed a bug that could cause a core dump when a trap handler was reset
to the default in the trap command associated with that signal.
g. Fixed a bug in the locale code that occurred when assigning a value
to LC_ALL.
h. A change was made to the parser so that words of the form xxx=(...)
are not considered compound assignment statements unless there are
characters before the `='.
i. A fix was made to the command tracing code to correctly quote each
word of output.
j. Some changes were made to the bash-specific autoconf tests to make them
more portable.
k. Completion of words with globbing characters now correctly quotes the
result.
l. The directory /var/spool/mail is now preferred to /usr/spool/mail when
configure is deciding on the default mail directory.
m. The brace completion code was fixed to not quote the `{' and `}'.
n. Some fixes were made to make $RANDOM more random in subshells.
o. System-specific changes were made to configure for: SVR4.2
p. Changes were made so that completion of words containing globbing chars
substitutes the result only if a single filename was matched.
q. The window size is now recomputed after a job is stopped with SIGTSTP if
the user has set `checkwinsize' with `shopt'.
r. When doing substring expansion, out-of-range substring specifiers now
cause nothing to be substituted rather than an expansion error.
s. A fix was made so that you can no longer trap `SIGEXIT' or `SIGDEBUG' --
only `EXIT' and `DEBUG' are accepted.
t. The display of trapped signals now uses the signal number if signals
for which bash does not know the name are trapped.
u. A fix was made so that `bash -r' does not turn on restricted mode until
after the startup files are executed.
v. A bug was fixed that occasionally caused a core dump when a variable
found in the temporary environment of export/declare/readonly had a
null value.
w. A bug that occasionally caused unallocated memory to be passed to free()
when doing arithmetic substitution was fixed.
x. A bug that caused a buffer overrun when expanding a prompt string
containing `\w' and ${#PWD} exceeded PATH_MAX was fixed.
y. A problem with the completion code that occasionally caused it to
refer to a character before the beginning of the readline line buffer
was fixed.
z. A bug was fixed so that the `read' builtin restarts reads when
interrupted by signals other than SIGINT.
aa. Fixed a bug that caused a command to be freed twice when there was
an evaluation error in the `eval' command.
2. Changes to Readline
a. Added a missing `extern' to a declaration in readline.h that kept
readline from compiling cleanly on some systems.
b. The history file is now opened with mode 0600 when it is written for
better security.
c. Changes were made to the SIGWINCH handling code so that prompt redisplay
is done better.
d. ^G now interrupts incremental searches correctly.
e. A bug that caused a core dump when the set of characters to be quoted
when completing words was empty was fixed.
------------------------------------------------------------------------------
This document details the changes between this version, bash-2.01-release,
and the previous version, bash-2.01-beta2.
1. Changes to Bash
a. The `distclean' target should remove the `printenv' executable if it
has been created.
b. The test suite was changed slightly to ensure that the error messages
are printed in English.
c. A bug that caused the shell to dump core when a filename containing a
`/' was passed to `hash' was fixed.
d. Pathname canonicalization now leaves a leading `//' intact, as POSIX.1
requires.
e. A memory leak when completing commands was fixed.
f. A memory leak that occurred when checking the hash table for commands
with relative paths was fixed.
------------------------------------------------------------------------------
This document details the changes between this version, bash-2.01-beta2,
and the previous version, bash-2.01-beta1.
1. Changes to Bash
a. The `ulimit' builtin translates RLIM_INFINITY to the hard limit only if
the current (soft) limit is less than or equal to the hard limit.
b. Fixed a bug that caused the bash emulation of strcasecmp to produce
incorrect results.
c. A bug that caused memory to be freed twice when a trap handler resets
the trap more than once was fixed.
d. A bug that caused machines where sizeof (pointer) > sizeof (int) to
fail (and possibly dump core) when trying to unwind-protect a null
pointer was fixed.
e. The startup files should not be run with job control enabled. This fix
allows SIGINT to once again interrupt startup file execution.
f. Bash should not change the SIGPROF handler if it is set to something
other than SIG_DFL.
g. The completion code that provides bash-specific completions for readline
now quotes characters that the readline code would treat as word break
characters if they appear in a file name.
h. The completion code now correctly quotes filenames containing a `!',
even if the user attempted to use double quotes when attempting
completion.
i. A bug that caused the shell to dump core when `disown' was called without
arguments and there was no current job was fixed.
j. A construct like $((foo);bar) is now processed as a command substitution
rather than as a bad arithmetic substitution.
k. A couple of bugs that caused `fc' to not obey the `cmdhist' and `lithist'
shell options when editing and re-executing a series of commands were
fixed.
l. A fix was made to the grammar -- the list of commands between `do' and
`done' in the body of a `for' command should be treated the same as a
while loop.
2. Changes to Readline
a. A couple of bugs that caused the history search functions to attempt to
free a NULL pointer were fixed.
b. If the C library provides setlocale(3), readline does not need to look
at various environment variables to decide whether or not to go into
eight-bit mode automatically -- just check whether the current locale
is not `C' or `POSIX'.
c. If the filename completion function finds that a directory was not closed
by a previous (interrupted) completion, it closes the directory with
closedir().
3. New Features in Bash
a. New bindable readline commands: history-and-alias-expand-line and
alias-expand-line. The code was always in there, there was just no
way to execute it.
------------------------------------------------------------------------------
This document details the changes between this version, bash-2.01-beta1,
and the previous version, bash-2.01-alpha1.
1. Changes to Bash
a. Fixed a problem that could cause file descriptors used for process
substitution to conflict with those used explicitly in redirections.
b. Made it easier to regenerate configure if the user changes configure.in.
c. ${GROUPS[0]} should always be the primary group, even on systems without
multiple groups.
d. Spelling correction is no longer enabled by default.
e. Fixes to quoting problems in `bashbug'.
f. OS-specific configuration changes were made for: Irix 6.
g. OS-specific code changes were made for: QNX.
h. A more meaningful message is now printed when the file in /tmp for a
here document cannot be created.
i. Many changes to the shell's variable initialization code to speed
non-interactive startup.
j. Changes to the non-job-control code so that it does not try to open
/dev/tty.
k. The output of `set' and `export' is once again sorted, as POSIX wants.
l. Fixed a problem caused by a recursive call reparsing the value of
$SHELLOPTS.
m. The tilde code no longer calls getenv() when it's compiled as part of
the shell, which should eliminate problems on systems that cannot
redefine getenv(), like the NeXT OS.
n. Fixed a problem that caused `bash -o' or `bash +o' to not list all
the shell options.
o. Fixed `ulimit' to convert RLIM_INFINITY to the appropriate hard limit
only if the hard limit is greater than the current (soft) limit.
p. Fixed a problem that arose when building bash in a different directory
than the source and y.tab.[ch] were remade with something other than
bison. This came up most often on NetBSD.
q. Fixed a problem with completion -- it thought that `pwd`/[TAB] indicated
an unfinished command completion (`/), which generated errors.
r. The bash special tilde expansions (~-, ~+) are now attempted before
calling the standard tilde expansion code, which should eliminate the
problems people have been seeing with this on Solaris 2.5.1.
s. Added support for <stdarg.h> to places where it was missing.
t. Changed the code that reads the output of a command substitution to not
go through stdio. This reduces the memory requirements and is faster.
u. A number of changes to speed up export environment creation were made.
v. A number of memory leaks were fixed as the result of running the test
scripts through Purify.
w. Fixed a bug that caused subshells forked to interpret executable
scripts without a leading `#!' to not reinitialize the values of
the shell options.
2. Changes to Readline
a. History library has less `#ifdef SHELL' code -- abstracted stuff out
into application-specific function hooks.
b. Readline no longer calls getenv() if it's compiled as part of the shell,
which should eliminate problems on systems that cannot redefine getenv(),
like the NeXT OS.
c. Fixed translation of ESC when `untranslating' macro values.
d. The region kill operation now fixes the mark if it ends up beyond the
boundaries of the line after the region is deleted.
3. New Features in Bash
a. New argument for `configure': `--with-curses'. This can be used to
override the selection of the termcap library on systems where it is
deficient.
------------------------------------------------------------------------------
This document details the changes between this version, bash-2.01-alpha1,
and the previous version, bash-2.0-release.
1. Changes to Bash
a. System-specific configuration changes for: FreeBSD, SunOS4, Irix,
MachTen, QNX 4.2, Harris Night Hawk, SunOS5.
b. System-specific code changes were made for: Linux, 4.4 BSD, QNX 4.2,
HP-UX, AIX 4.2.
c. A bug that caused the exec builtin to fail because the full pathname of
the command could not be found was fixed.
d. The code that performs output redirections is now more resistant to
race conditions and possible security exploits.
e. A bug that caused the shell to dump core when performing pattern
substitutions on variable values was fixed.
f. More hosts are now recognized by the auto-configuration mechanism
(OpenBSD, QNX, others).
g. Assignments to read-only variables that attempt to convert them to
arrays are now errors.
h. A bug that caused shell scripts using array assignments in POSIX mode
to exit after the assignment was performed was fixed.
i. The substring expansion code is now more careful about running off the
ends of the expanded variable value.
j. A bug that caused completion to fail if a backquoted command substitution
appeared anywhere on the line was fixed.
k. The `source' builtin no longer turns off history if it has been enabled
in a non-interactive shell.
l. A bug that caused the shell to crash when `disown' was given a pid
instead of a job number was fixed.
m. The `cd' spelling correction code will not try to change to `.' if no
directory entries match a single-character argument.
n. A bad variable name supplied to `declare', `export', or `readonly' no
longer causes a non-interactive shell in POSIX mode to exit.
o. Some fixes were made to the test suite to handle peculiarities of
various Unix versions.
p. The bash completion code now quotes characters that readline would
treat as word breaks for completion but are not shell metacharacters.
q. Bad options supplied at invocation now cause a usage message to be
displayed.
r. Fixes were made to the code that handles DEBUG traps so that the trap
string is not freed inappropriately.
s. Some changes were made to the bash debugger in examples/bashdb -- it
should be closer to working now.
t. A problem that caused the default filename used for mail checking to be
wrong was fixed.
u. A fix was made to the `echo' builtin so that NUL characters printed with
`echo -e' do not cause the output to be truncated.
v. A fix was made to the job control code so that the shell behaves better
when monitor mode is enabled in a non-interactive shell.
w. Bash no longer catches all of the terminating signals in a non-
interactive shell until a trap is set on EXIT, which should result in
quicker startup.
x. A fix was made to the command timing code so that `time' can be used in
a loop.
y. A fix was made to the parser so that `((cmd); cmd2)' is now parsed as
a nested subshell rather than strictly as an (errnoeous) arithmetic
command.
z. A fix was made to the globbing code so that it correctly matches quoted
filenames beginning with a `.'.
aa. A bug in `fc' that caused some multi-line commands to not be stored as
one command in the history when they were re-executed after editing
(with `fc -e') was fixed.
bb. The `ulimit' builtin now attempts to catch some classes of integer
overflows.
cc. The command-oriented-history code no longer attempts to add `;'
inappropriately when a newline appears while reading a $(...) command
substitution.
dd. A bug that caused the shell to dump core when `help --' was executed
was fixed.
ee. A bug that caused the shell to crash when an unset variable appeared
in the body of a here document after `set -u' had been executed was
fixed.
ff. Implicit input redirections from /dev/null for asynchronous commands
are now handled better.
gg. A bug that caused the shell to fail to compile when configured with
`--disable-readline' was fixed.
hh. The globbing code should now be interruptible.
ii. Bash now notices when the `kill' builtin is used to send SIGCONT to a
stopped job and adjusts the data structures accordingly, as if `bg' had
been executed instead.
jj. A bug that caused the shell to crash when mixing calls to `getopts'
and `shift' on the same set of positional parameters was fixed.
kk. The command printing code now preserves the `-p' flag to `time'.
ll. The command printing code now handles here documents better when there
are other redirections associated with the command.
mm. The special glibc environment variable (NNN_GNU_nonoption_argv_flags_)
is no longer placed into the environment of executed commands -- users
of glibc had too many problems with it.
nn. Reorganized the code that generates signames.h. The signal_names list
is now more complete but may be slightly different (SIGABRT is favored
over SIGIOT, for example). The preferred signal names are those
listed in the POSIX.2 standard.
oo. `bashbug' now uses a filename shorter than 14 characters for its
temporary file, and asks for confirmation before sending the bug
report.
pp. A bug that caused TAB completion in vi editing mode to not be turned
off when `set -o posix' was executed or back on when `set +o posix'
was executed was fixed.
qq. A bug in the brace expansion code that caused brace expansions appearing
in new-style $(...) command substitutions to be inappropriately expanded
was fixed.
rr. A bug in the readline hook shell-expand-line that could cause memory to
be inappropriately freed was fixed.
ss. A bug that caused some arithmetic expressions containing `&&' and `||'
to be parsed with the wrong precedence has been fixed.
tt. References to unbound variables after `set -u' has been executed now
cause the shell to exit immediately, as they should.
uu. A bug that caused the shell to exit inappropriately when `set -e' had
been executed and a command's return status was being inverted with the
`!' reserved word was fixed.
vv. A bug that could occasionally cause the shell to crash with a
divide-by-zero error when timing a command was fixed.
ww. A bug that caused parameter pattern substitution to leave stray
backslashes in the replacement string when the expression is in
double quotes was fixed.
xx. The `break' and `continue' builtins now break out of all loops when an
invalid count argument is supplied.
yy. Fixed a bug that caused PATH to be set to the empty string if
`command -p' is executed with PATH unset.
zz. Fixed `kill -l signum' to print the signal name without the `SIG' prefix,
as POSIX specifies.
aaa. Fixed a bug that caused the shell to crash while setting $SHELLOPTS
if there were no shell options set.
bbb. Fixed `export -p' and `readonly -p' so that when the shell is in POSIX
mode, their output is as POSIX.2 specifies.
ccc. Fixed a bug in `readonly' so that `readonly -a avar=(...)' actually
creates an array variable.
ddd. Fixed a bug that prevented `time' from correctly timing background
pipelines.
2. Changes to Readline
a. A bug that caused an extra newline to be printed when the cursor was on
an otherwise empty line was fixed.
b. An instance of memory being used after it was freed was corrected.
c. The redisplay code now works when the prompt is longer than the screen
width.
d. `dump-macros' is now a bindable name, as it should have been all along.
e. Non-printable characters are now expanded when displaying macros and
their values.
f. The `dump-variables' and `dump-macros' commands now output a leading
newline if they're called as the result of a key sequence, rather
than directly by an application.
3. New Features in Bash
a. There is a new builtin array variable: GROUPS, the set of groups to which
the user belongs. This is used by the test suite.
4. New Features in Readline
a. If a key sequence bound to `universal-argument' is read while reading a
numeric argument started with `universal-argument', it terminates the
argument but is otherwise ignored. This provides a way to insert multiple
instances of a digit string, and is how GNU emacs does it.
------------------------------------------------------------------------------
This document details the changes between this version, bash-2.0-release,
and the previous version, bash-2.0-beta3.
1. Changes to Bash
a. Fix to the `getopts' builtin so that it does the right thing when a
required option argument is not present.
b. The completion code now updates the common prefix of matched names
after FIGNORE processing is done, since any names that were removed
may have changed the common prefix.
c. Fixed a bug that made messages in MAILPATH entries not work correctly.
d. Fixed a serious documentation error in the description of the new
${parameter:offset[:length]} expansion.
e. Fixes to make parameter substring expansion ({$param:offset[:length]})
work when within double quotes.
f. Fixes to make ^A (CTLESC) survive an unquoted expansion of positional
parameters.
g. Corrected a misspelling of `unlimited' in the output of `ulimit'.
h. Fixed a bug that caused executable scripts without a leading `#!' to
occasionally pick up the wrong set of positional parameters.
i. Linux systems now have a working `ulimit -v', using RLIMIT_AS.
j. Updated config.guess so that many more machine types are recognized.
k. Fixed a bug with backslash-quoted slashes in the ${param/pat[/sub]}
expansion.
l. If the shell is named `-su', and `-c command' is supplied, read and
execute the login shell startup files even though the shell is not
interactive. This is to support the `-' option to `su'.
m. Fixed a bug that caused core dumps when the DEBUG trap was ignored
with `trap "" DEBUG' and a shell function was subsequently executed.
n. Fixed a bug that caused core dumps in the read builtin when IFS was
set to the null string and the input had leading whitespace.
2. Changes to Readline
a. Fixed a bug that caused a numeric argument of 1024 to be ignored when
inserting text.
b. Fixed the display code so that the numeric argument is displayed as it's
being entered.
c. Fixed the numeric argument reading code so that `M-- command' is
equivalent to `M--1 command', as the prompt implies.
3. New Features in Bash
a. `ulimit' now sets both hard and soft limits and reports the soft limit
by default (when neither -H nor -S is specified). This is compatible
with versions of sh and ksh that implement `ulimit'.
b. Integer constants have been extended to base 64.
4. New Features in Readline
a. The `home' and `end' keys are now bound to beginning-of-line and
end-of-line, respectively, if the corresponding termcap capabilities
are present.
------------------------------------------------------------------------------
This document details the changes between this version, bash-2.0-beta3,
and the previous version, bash-2.0-beta2.
1. Changes to Bash
a. System-specific changes for: AIX 4.2, SCO 3.2v[45], HP-UX.
b. When in POSIX mode, variable assignments preceding a special builtin
persist in the shell environment after the builtin completes.
c. Changed all calls to getwd() to getcwd(). Improved check for systems
where the libc getcwd() calls popen(), since that breaks on some
systems when job control is being used.
d. Fixed a bug that caused seg faults when executing scripts with the
execute bit set but without a leading `#!'.
e. The environment passed to executed commands is never sorted.
f. A bug was fixed in the code that expands ${name[@]} to the number of
elements in an array variable.
g. A bug was fixed in the array compound assignment code ( A=( ... ) ).
h. Window size changes now correctly propagate down to readline if
the shopt `checkwinsize' option is enabled.
i. A fix was made in the code that expands to the length of a variable
value (${#var}).
j. A fix was made to the command builtin so that it did not turn on the
`no fork' flag inappropriately.
k. A fix was made to make `set -n' work more reliably.
l. A fix was made to the job control initialization code so that the
terminal process group is set to the shell's process group if the
shell changes its own process group.
2. Changes to Readline
a. System-specific changes for: SCO 3.2v[45].
b. The behavior of the vi-mode `.' when redoing an `i' command was changed
to insert the text previously inserted by the `i' command rather than
simply entering insert mode.
3. New features in Bash
a. There is a new version of the autoload function package, in
examples/functions/autoload.v2, that uses arrays and provides more
functionality.
b. Support for LC_COLLATE and locale-specific sorting of the results of
pathname expansion if strcoll() is available.
4. New Features in Readline
a. Support for locale-specific sorting of completion possibilities if
strcoll() is available.
------------------------------------------------------------------------------
This document details the changes between this version, bash-2.0-beta2,
and the previous version, bash-2.0-beta1.
1. Changes to Bash
a. `pushd -' is once again equivalent to `pushd $OLDPWD'.
b. OS-specific changes for: SCO 3.2v[45].
c. A change was made to the fix for the recently-reported security hole
when reading characters with octal value 255 to make it work better on
systems with restartable system calls when not using readline.
d. Some changes were made to the test suite so that it works if you
configure bash with --enable-usg-echo-default.
e. A fix was made to the parsing of conditional arithmetic expressions.
f. Illegal arithmetic bases now cause an arithmetic evaluation error rather
than being silently reset.
g. Multiple arithmetic bases now cause an arithmetic evaluation error
instead of being ignored.
h. A fix was made to the evaluation of ${param?word} to conform to POSIX.2.
i. A bug that sometimes caused array indices to be evaluated twice (which
would cause errors when they contained assignment statements) was fixed.
j. `ulimit' was rewritten to avoid problems with getrlimit(2) returning
unsigned values and to simplify the code.
k. A bug in the command-oriented-history code that caused it to sometimes
put semicolons after right parens inappropriately was fixed.
l. The values inserted into the prompt by the \w and \W escape sequences
are now quoted to prevent further expansion.
m. An interactive shell invoked as `sh' now reads and executes commands
from the file named by $ENV when it starts up. If it's a login shell,
it does this after reading /etc/profile and ~/.profile.
n. The file named by $ENV is never read by non-interactive shells.
2. Changes to Readline
a. A few changes were made to hide some macros and functions that should not
be public.
b. An off-by-one error that caused seg faults in the history expansion code
was fixed.
3. New Features in Bash
a. The ksh-style ((...)) arithmetic command was implemented. It is exactly
identical to let "...". This is controlled by a new option to configure,
`--enable-dparen-arithmetic', which is on by default.
b. There is a new #define available in config.h.top: SYS_BASH_LOGOUT. If
defined to a filename, bash reads and executes commands from that file
when a login shell exits. It's commented out by default.
c. `ulimit' has a `-l' option that reports the maximum amount of data that
may be locked into memory on 4.4BSD-based systems.
------------------------------------------------------------------------------
This document details the changes between this version, bash-2.0-beta1,
and the previous version, bash-2.0-alpha4.
1. Changes to Bash
a. A bug that sometimes caused traps to be ignored on signals the
shell treats specially was fixed.
b. The internationalization code was changed to track the values of
LC_* variables and call setlocale() as appropriate. The TEXTDOMAIN
and TEXTDOMAINDIR variables are also tracked; changes cause calls
to textdomain() and bindtextdomain(), if available.
c. A bug was fixed that sometimes caused double-quoted strings to be
parsed incorrectly.
d. Changes were made so that the siglist code compiles correctly on
Solaris 2.5.
e. Added `:' to the set of characters that cause word breaks for the
completion code so that pathnames in assignments to $PATH can be
completed.
f. The `select' command was fixed to print $PS3 to stderr.
g. Fixed an error in the manual page section describing the effect that
setting and unsetting GLOBIGNORE has on the setting of the `dotglob'
option.
h. The time conversion code now uses CLK_TCK rather than CLOCKS_PER_SEC
on systems without gettimeofday() and resources.
i. The getopt static variables are now initialized each time a subshell
is started, so subshells using `getopts' work right.
j. A sign-extension bug that caused a possible security hole was fixed.
k. The parser now reads characters between backquotes within a double-
quoted string as a single word, so double quotes in the backquoted
string don't terminate the enclosing double-quoted string.
l. A bug that caused `^O' to work incorrectly when typed as the first
thing to an interactive shell was fixed.
m. A rarely-exercised off-by-one error in the code that quotes variable
values was fixed.
n. Some memory and file descriptor leaks encountered when running a
shell script that is executable but does not have a leading `#!'
were plugged.
2. Changes to Readline
a. A bug that sometimes caused incorrect results when trying to read
typeahead on systems without FIONREAD was fixed.
3. New Features in Bash
a. The command timing code now uses the value of the TIMEFORMAT variable
to format and display timing statistics.
b. The `time' reserved word now accepts a `-p' option to force the
POSIX.2 output format.
c. There are a couple of new and updated scripts to convert csh startup
files to bash format.
d. There is a new builtin array variable: BASH_VERSINFO. The various
members hold the parts of the version information in BASH_VERSION,
plus the value of MACHTYPE.
4. New Features in Readline
a. Setting LANG to `en_US.ISO8859-1' now causes readline to enter
eight-bit mode.
------------------------------------------------------------------------------
This document details the changes between this version, bash-2.0-alpha4,
and the previous version, bash-2.0-alpha3.
1. Changes to Bash
a. There is better detection of rsh connections on Solaris 2.
b. Assignments to read-only variables preceding a command name are now
variable assignment errors. Variable assignment errors cause
non-interactive shells running in posix mode to exit.
c. The word tokenizer was rewritten to handle nested quotes and pairs
('', "", ``, ${...}, $(...), $[...], $'...', $"...", <(...), >(...))
correctly. Some of the parameter expansion code was updated as a
consequence.
d. A fix was made to `test' when given three arguments so that a binary
operator is checked for first, before checking that the first argument
is `!'.
e. 2''>/dev/null is no longer equivalent to 2>/dev/null.
f. Parser error messages were regularized, and in most cases the name of
the shell script being read by a non-interactive shell is not printed
twice.
g. A fix was made to the completion code so that it no longer removes the
text the user typed in some cases.
h. The special glibc `getopt' environment variable is no longer put into
the environment on machines with small values of ARG_MAX.
i. The expansion of ${...} now follows the POSIX.2 rules for finding the
closing `}'.
j. The shell no longer displays spurious status messages for background
jobs in shell scripts that complete successfully when the script is
run from a terminal.
k. `shopt -o' now correctly updates $SHELLOPTS.
l. A bug that caused the $PATH searching code to return a non-executable
file even when an executable file with the same name appeared later in
$PATH was fixed.
m. The shell now does tilde expansions on unquoted `:~' in assignment
statements when not in posix mode.
n. Variable assignment errors when a command consists only of assignments
now cause non-interactive shells to exit when in posix mode.
o. If the variable in a `for' or `select' command is read-only, or not a
legal shell identifier, a variable assignment error occurs.
p. `test' now handles `-a' and `-o' as binary operators when three arguments
are supplied, and correctly parses `( word )' as equivalent to `word'.
q. `test' was fixed so that file names of the form /dev/fd/NN mean the same
thing on all systems, even Linux.
r. Fixed a bug in the globbing code that caused patterns with multiple
consecutive `*'s to not be matched correctly.
s. Fixed a bug that caused $PS2 to not be printed when an interactive shell
not using readline is reading a here document.
t. Fixed a bug that caused history expansion to be performed inappropriately
when a single-quoted string spanned more than one line.
u. `getopts' now checks that the variable name passed by the user as the
second argument is a legal shell identifier and that the variable is
not read-only.
v. Fixed `getopts' to obey POSIX.2 rules for setting $OPTIND when it
encounters an error.
w. Fixed `set' to display variable values in a form that can be re-read.
x. Fixed a bug in the code that keeps track of whether or not local variables
have been declared at the current level of function nesting.
y. Non-interactive shells in posix mode now exit if the name in a function
declaration is not a legal identifier.
z. The job control code now ignores stopped children when the shell is not
interactive.
aa. The `cd' builtin no longer attempts spelling correction on the directory
name if the shell is not interactive, regardless of the setting of the
`cdspell' option.
bb. Some OS-specific changes were made for SCO 3.2v[45] and AIX 4.2.
cc. `time' now prints its output to stderr, as POSIX.2 specifies.
2. Fixes to Readline
a. After printing possible completions, all lines of a multi-line prompt
are redisplayed.
b. Some changes were made to the terminal handling code in rltty.c to
work around AIX 4.2 bugs.
3. New Features in Bash
a. There is a new loadable builtin: sprintf, with calling syntax
sprintf var format [args]
This provides an easy way to simulate ksh left- and right-justified
variable values.
b. The expansions of \h and \H in prompt strings were swapped. \h now
expands to the hostname up to the first `.', as in bash-1.14.
4. New Features in Readline
a. The bash-1.14 behavior when ^M is typed while doing an incremental
search was restored. ^J may now be used to terminate the search without
accepting the line.
b. There is a new bindable variable: disable-completion. This inhibits
word completion and causes the completion character to be inserted as
if it had been bound to self-insert.
------------------------------------------------------------------------------
This document details the changes between this version, bash-2.0-alpha3,
and the previous version, bash-2.0-alpha2.
There is now a file `COMPAT' included in the distribution that lists the
user-visible incompatibilities between 1.14 and 2.0.
1. Changes to Bash
a. Some work was done so that word splitting of the rhs of assignment
statements conforms more closely to historical practice.
b. A couple of errant memory frees were fixed.
c. A fix was made to the test builtin so it recognizes `<' and `>' as
binary operators.
d. The GNU malloc in lib/malloc/malloc.c now scrambles memory as it's
allocated and freed. This is to catch callers that refer to freed
memory or assume something about newly-allocated memory.
e. Fixed a problem with conversion to 12-hour time in the prompt
expansion code.
f. Fixed a problem with configure's argument parsing order. Now you can
correctly turn on specific options after using --enable-minimal-config.
g. The configure script now automatically disables the use of GNU malloc
on systems where it's appropriate (better than having people read the
NOTES file and do it manually).
h. There are new prompt expansions (\v and \V) to insert version information
into the prompt strings.
i. The default prompt string now includes the version number.
j. Most of the builtins that take no options were changed to use the
internal getopt so they can produce proper error messages for -?
and incorrect options.
k. Some system-specific changes were made for SVR4.2 and Solaris 2.5.
l. Bash now uses PATH_MAX instead of MAXPATHLEN and NAME_MAX instead of
MAXNAMLEN.
m. A couple of problems caused by uninitialized variables were fixed.
n. There are a number of new loadable builtin examples: logname, basename,
dirname, tty, pathchk, tee, head, and rmdir. All of these conform to
POSIX.2.
o. Bash now notices changes in TZ and calls tzset() if present, so
changing TZ will alter the time printed by prompt expansions.
p. The source was reorganized a bit so I don't have to wait so long for
some files to compile, and to facilitate the creation of a `shell
library' at some future point.
q. Bash no longer turns off job control if called as `sh', since the
POSIX.2 spec includes job control as a standard feature.
r. `bash -o posix' now works as intended.
s. Fixed a problem with the completion code: when completing a filename
that contained globbing characters, if show-all-if-ambiguous was set,
the completion code would remove the user's text.
t. Fixed ulimit so that (hopefully) the full range of limits is available
on HPUX systems.
u. A new `shopt' option (`hostcomplete') enables and disables hostname
completion.
v. The shell no longer attempts to save the history on an abort(),
which is usually called by programming_error().
w. The `-s' option to `fc' was changed to echo the command to be executed
to stderr instead of stdout.
x. If the editor invoked by `fc -e' exits with a non-zero status, no
commands are executed.
y. Fixed a bug that made the shopt `histverify' option work incorrectly.
z. There is a new variable `MACHTYPE' whose value is the GNU-style
`cpu-company-system' system description as set by configure. (The
values of MACHTYPE and HOSTTYPE should really be swapped.)
aa. The `ulimit' builtin now allows the maximum virtual memory size to be
set via setrlimit(2) if RLIMIT_VMEM is defined.
bb. `bash -nc 'command'' no longer runs `command'.
2. Changes to Readline
a. Fixed a typo in the code that checked for FIONREAD in input.c.
b. Fixed a bug in the code that outputs keybindings, so things like C-\
are quoted properly.
c. Fixed a bug in the inputrc file parsing code to handle the problems
caused by inputrc files created from the output of `bind -p' in
previous versions of bash. The problem was due to the bug fixed
in item b above.
d. Readline no longer turns off the terminal's meta key, and turns it on
once the first time it's called.
------------------------------------------------------------------------------
This file documents the changes between this version, bash-2.0-alpha2,
and the previous version, bash-2.0-alpha.
1. Changes to Bash
a. The shell no longer thinks directories are executable.
b. `disown' has a new option, `h', which inhibits the resending of SIGHUP
but does not remove the job from the jobs table.
c. The varargs functions in error.c now use ANSI-C `stdarg' if available.
d. The build process now treats the `build version' in .build as local to
the build directory, so different versions built from the same source
tree have different `build versions'.
e. Some problems with the grammar have been fixed. (It used `list' in a few
productions where `compound_list' was needed. A `list' must be terminated
with a newline or semicolon; a `compound_list' need not be.)
f. A fix was made to keep `wait' from hanging when waiting for all background
jobs.
g. `bash --help' now writes its output to stdout, like the GNU Coding Standards
specify, and includes the machine type (the value of MACHTYPE).
h. `bash --version' now prints more information and exits successfully, like
the GNU Coding Standards specify.
i. The output of `time' and `times' now prints fractional seconds with three
places after the decimal point.
j. A bug that caused process substitutions to screw up the pipeline printed
by `jobs' was fixed.
k. Fixes were made to the code that implements $'...' and $"..." so they
work as documented.
l. The process substitution code now opens named pipes for reading with
O_NONBLOCK to avoid hanging.
m. Fixes were made to the trap code so the shell cleans up correctly if the
trap command contains a `return' and we're executing a function or
sourcing a script with `.'.
n. Fixes to doc/Makefile.in so that it doesn't try to remake all of the
documentation (ps, dvi, etc.) on a `make install'.
o. Fixed an auto-increment error that caused bash -c args to sometimes dump
core.
p. Fixed a bug that caused $HISTIGNORE to fail when the history line
contained globbing characters.
2. Changes to Readline
a. There is a new string variable, rl_library_version, available for use by
applications. The current value is "2.1".
b. A bug encountered when expand-tilde was enabled and file completion was
attempted on a word beginning with `~/' was fixed.
c. A slight change was made to the incremental search termination behavior.
ESC still terminates the search, but if input is pending or arrives
within 0.1 seconds (on systems with select(2)), it is used as a prefix
character. This is intented to allow users to terminate searches with
the arrow keys and get the behavior they expect.
|