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2017-01-11ash: commented-out possible fix for 7694Denys Vlasenko
bash has a feature: it restores termios after a successful wait for a foreground job which had at least one stopped or sigkilled member. The probable rationale is that SIGSTOP and SIGKILL can preclude task from properly restoring tty state. Should we do this too? A reproducer: ^Z an interactive python: $ python Python 2.7.12 (...) >>> ^Z { python leaves tty in -icanon -echo state. We do survive that... } [1]+ Stopped python { ...however, next program (python no.2) does not survive it well: } $ python Python 2.7.12 (...) >>> Traceback (most recent call last): { above, I typed "qwerty<CR>", but -echo state is still in effect } File "<stdin>", line 1, in <module> NameError: name 'qwerty' is not defined The implementation is modeled on bash code and seems to work. However, I'm not sure we should do this. For one: what if I'd fg the stopped python instead? It'll be confused by "restored" tty state. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11ash: 16-bit ->nprocs field is a pain for many CPUsDenys Vlasenko
function old new delta getoptscmd 527 540 +13 getjob 280 286 +6 makejob 278 282 +4 forkchild 602 600 -2 waitcmd 208 205 -3 showjob 382 379 -3 getstatus 83 80 -3 dowait 408 405 -3 freejob 93 89 -4 fg_bgcmd 290 286 -4 forkshell 260 255 -5 killcmd 224 218 -6 jobno 17 11 -6 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/10 up/down: 23/-39) Total: -16 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11libbb: consolidate the code to set termios unbuffered modeDenys Vlasenko
function old new delta set_termios_to_raw - 116 +116 count_lines 72 74 +2 powertop_main 1458 1430 -28 top_main 943 914 -29 more_main 759 714 -45 fsck_minix_main 2969 2921 -48 conspy_main 1197 1135 -62 rawmode 99 36 -63 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/6 up/down: 118/-275) Total: -157 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11hush: reinstate [[ builtinDenys Vlasenko
Mike deleted it: commit 39456a18a104b228de240b265bd943251219849d Author: Mike Frysinger <vapier@gentoo.org> Date: Sat Mar 28 12:21:57 2009 +0000 stop lying about [[ test support probably because it was not properly ifdefed around, and was enabled even when bash compat is off. I just tested it - it works: $ [ *.diff = z.diff ]; echo $? 0 $ [[ *.diff = z.diff ]]; echo $? 1 Of course, not all numerous bash tricks of [[ ]] are implemented... function old new delta bltins2 60 72 +12 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11hush: split bash compatible extensions into separate defines. No code changesKang-Che Sung
Splitting these options makes it self-documenting about what bash-compatible features we have. Signed-off-by: Kang-Che Sung <explorer09@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11ash: split bash compatible extensions into separate defines. No code changesDenys Vlasenko
Splitting these options makes it self-documenting about what bash-compatible features we have. Signed-off-by: Kang-Che Sung <explorer09@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10hush: shorten output of "help" builtinDenys Vlasenko
text data bss dec hex filename 891272 485 6856 898613 db635 busybox_old 891232 485 6856 898573 db60d busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10hush: reorder builtins (cd and pwd ought to be close, etc), no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10ash: revert "make dot command search current directory first"Denys Vlasenko
Reverts this: commit 8ad78e1ec7b2e873953f9f476fb63b5893526c39 Author: Denis Vlasenko <vda.linux@googlemail.com> Date: Sun Feb 15 12:40:30 2009 +0000 ash: make dot command search current directory first, as bash does. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10shells: make hush test optional, rename ASH_BUILTIN_foo -> ASH_fooDenys Vlasenko
This makes hash and ash more symmetrical wrt config menu and config options. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10Big cleanup in config help and descriptionDenys Vlasenko
Redundant help texts (one which only repeats the description) are deleted. Descriptions and help texts are trimmed. Some config options are moved, even across menus. No config option _names_ are changed. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09hush: make echo builtin optionalDenys Vlasenko
It's a bit overkill (who would want it off?) but ash already has it configurable. Let's be symmetric. Also tweak kbuild logic to use ASH_BUILTIN_ECHO to select echo.o, not ASH. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09ash: fix a bug in argv restoration after sourcing a fileDenys Vlasenko
if sourced file "shift"ed argvs so that $1 is NULL, restore wasn't done. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09hush: fix a bug in argv restoration after sourcing a fileDenys Vlasenko
if sourced file "shift"ed argvs so that $1 is NULL, restore wasn't done. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09hush: global_args_malloced is used only if set builtin is enabledDenys Vlasenko
function old new delta run_pipe 1623 1635 +12 builtin_source 210 222 +12 save_and_replace_G_args 70 60 -10 builtin_shift 132 94 -38 restore_G_args 98 - -98 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 2/2 up/down: 24/-146) Total: -122 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09hush: fix 'defined but not used' warningDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09hush: remove redundand test for ENABLE_HUSH_JOBDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09hush: fix kill builtin without jobs supportDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09typo fixDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-08hush: conditionalize print_escaped() on EXPORT || TRAPDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-08hush: make memleak builtin optionalDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-08hush: make export builtin optionalDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-08hush: make umask builtin optionalDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-08hush: make set/unset builtins optionalDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-08hush: make read and trap builtins optionalDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-08hush: kill builtin and kill %jobspec supportDenys Vlasenko
Also made it and printf, type and wait builtins optional. function old new delta builtin_kill - 323 +323 bltins1 336 348 +12 builtin_type 114 116 +2 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 2/0 up/down: 337/0) Total: 337 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-08hush: support %%, %+ and % jobspec (meaning "current job")Denys Vlasenko
function old new delta parse_jobspec 83 133 +50 builtin_wait 278 283 +5 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-07ash: fix open fds leaking in redirects. Closes 9561Denys Vlasenko
commit e19923f6652a638ac39c84012e97f52cf5a7568e deleted clearredir() call in shellexec(): ash: [REDIR] Remove redundant CLOEXEC calls Upstream commit: Now that we're marking file descriptors as CLOEXEC in savefd, we no longer need to close them on exec or in setinputfd. but it missed one place where we don't set CLOEXEC. Fixing this. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-06ash: explicltly group ash optionsKang-Che Sung
This would makes all ash options indented inside "ash" in menuconfig. It appears that menuconfig has a limit at tracking multiple dependency lines like this (it looks like a "diamond problem" but I'm not sure if it is): ---ASH <---------- / \ ASH_OPTIMIZE_FOR_SIZE !NOMMU <-*----SH_IS_ASH <----[OR] <--ASH_INTERNAL_GLOB \ / ASH_RANDOM_SUPPORT ---BASH_IS_ASH <-- [...] The kconfig-language document [1] states that: > If a menu entry somehow depends on the previous entry, it can be > made a submenu of it. First, the previous (parent) symbol must be > part of the dependency list and then one of these two conditions > must be true: > - the child entry must become invisible, if the parent is set to 'n' [BusyBox ash used to satisfy this, but no longer does] > - the child entry must only be visible, if the parent is visible [BusyBox ash configs actually satisfy this, but because of "diamond" above this might not be easily detected] So I found out a direct workaround: by making ash options explicitly depend on !NOMMU, we can tell menuconfig that rule 2 above is satisfied without any more tracking. --------------------- / \ !NOMMU <-*-----ASH <-------- \ \ \ \ ASH_OPTIMIZE_FOR_SIZE *---SH_IS_ASH <---[OR]-[AND] <--ASH_INTERNAL_GLOB \ / ASH_RANDOM_SUPPORT --BASH_IS_ASH <- [...] So all ash options would now be indented under "ash". [1] "Documentation/kbuild/kconfig-language.txt" in Linux kernel source Signed-off-by: Kang-Che Sung <explorer09@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-04shell: clarify help text of CONFIG_{SH,BASH}_IS_* optionsKang-Che Sung
Mention the behavior if user selects CONFIG_SH_IS_ASH but not CONFIG_ASH. We will be explicit that invocations like "busybox ash" will not work for such configuration. Also clarify help text of CONFIG_BASH_IS_* that bash compatibility in ash is not complete. (It shouldn't be anyway - ash can't support every bash quirk out there.) Signed-off-by: Kang-Che Sung <explorer09@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-03hush: correct exitcode for unterminated ')' - exitcode2.tests testcaseDenys Vlasenko
function old new delta parse_stream 2595 2609 +14 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-03ash: fix error code regressionRon Yorston
The commit 'ash,hush: set exit code 127 in "sh /does/not/exist" case' only partly implemented the dash commit '[ERROR] Allow the originator of EXERROR to set the exit status'. This resulted in incorrect error codes for a syntax error: $ ) $ echo $? 0 or a redirection error for a special builtin: $ rm -f xxx $ eval cat <xxx $ echo $? 0 Signed-off-by: Ron Yorston <rmy@pobox.com> Reported-by: Martijn Dekker <martijn@inlv.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-12-23Make it possible to select "sh" and "bash" aliases without selecting ash or hushDenys Vlasenko
The same can be done for msh, but we are probably better off just deleting it in a next versio or two. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-12-22shell: move "config" blocks above their use in coditional includesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-12-22Tweak some config defaults; fix MODPROBE_SMALL ordering in "make config"Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-12-21ash: clarify uclibc glob() bug in commentDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-12-21ash: error out if ASH_INTERNAL_GLOB is not selected on uClibcDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-12-12ash: fix signed char expansion bugDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-12-12shell: suppress "unused var/func" warnings on some configsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-25ash,hush: make ^C in interactive mode visually much closer to bash behaviorDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-24ash,hush: ^C from command line should set $? to 128+SIGINTDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-23test: make [ and [[ forms individually selectableDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08hush: make getch/peek functions directly calledDenys Vlasenko
Indirect calls are more difficult to predict. Unfortunately, on x64 direct call is 5 bytes while indirect "call (reg+ofs)" is 3 bytes: function old new delta i_getch - 82 +82 i_peek - 63 +63 parse_stream 2531 2579 +48 parse_dollar 771 797 +26 parse_redirect 296 321 +25 add_till_closing_bracket 408 420 +12 encode_string 256 265 +9 i_peek_and_eat_bkslash_nl 93 99 +6 add_till_backquote 110 114 +4 parse_and_run_stream 139 141 +2 expand_vars_to_list 1143 1144 +1 static_peek 6 - -6 setup_string_in_str 39 18 -21 setup_file_in_str 40 19 -21 static_get 27 - -27 file_peek 52 - -52 file_get 65 - -65 ------------------------------------------------------------------------------ (add/remove: 2/4 grow/shrink: 9/2 up/down: 278/-192) Total: 86 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08hush: renumber PIPE_foo, make PIPE_SEQ = 0Denys Vlasenko
PIPE_SEQ is used most often, having it zero makes code smaller: function old new delta done_word 719 707 -12 parse_stream 2546 2531 -15 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08hush: small optimization in run_listDenys Vlasenko
I thought gcc can detect this itself. It doesn't. function old new delta run_list 1030 1021 -9 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08hush: deindent large block of code, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08hush: simplify insert_bg_jobsDenys Vlasenko
function old new delta insert_bg_job 366 281 -85 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08hush: make "wait %1" less likely to play with signal maskDenys Vlasenko
Was playing with "sleep 3 | exit 3 & wait %1" and noticed that often SIGCHLD arrives even before I get to signal masking. Can avoid it in this case. function old new delta wait_for_child_or_signal 228 265 +37 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08hush: rework "wait %jobspec" to work in non-interactive shells tooDenys Vlasenko
Also add tests. wait5.tests so far fails (but works for ash and dash). function old new delta builtin_wait 305 283 -22 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-07hush: "wait $!; echo $?" should return 127 if $! already exitedDenys Vlasenko
It would be nice to provide bash-like "remember las exitcode" thingy, but it's a bit complex. For now, match ash and dash. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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