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2017-07-28ash: less hackish implementation of evaltreenr()Denys Vlasenko
Defining a function alias with __attribute__ ((alias("evaltree"),__noreturn__)) is not that usual, and clang had a bug which made it misunderstand this construct. Switch to: ALWAYS_INLINE NORETURN evaltreenr() { evaltree(); unreachable(); } Older gcc's do not know unreachable(), on them we pay the price of having a few extra calls to abort(): function old new delta evalsubshell 151 156 +5 evalpipe 357 362 +5 argstr 1141 1144 +3 On newer gcc, code size does not change. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: force inlining of a trivial functionDenys Vlasenko
function old new delta bltinlookup 5 - -5 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: revert previous implementation of "A=1 A=2 B=$A cmd" codeDenys Vlasenko
Reverts this: commit 0e6f661e23d358cca104c24f8438d0ec64df32f1 Date: Fri Feb 15 15:02:15 2008 +0000 ash: handle "A=1 A=2 B=$A; echo $B". closes bug 947. A different fix from upstream has been imported by previous six commits. Last seven commits, cumulative: function old new delta poplocalvars - 314 +314 mklocal - 288 +288 pushlocalvars - 48 +48 evalcommand 1372 1408 +36 unwindlocalvars - 22 +22 ash_main 1022 1029 +7 setvar 167 172 +5 localvar_stack - 4 +4 setvareq 303 302 -1 evalcase 271 269 -2 subevalvar 1202 1198 -4 localvars 4 - -4 cmdenviron 4 - -4 expandarg 984 973 -11 evalvar 589 574 -15 argstr 1164 1141 -23 dotcmd 335 303 -32 bltinlookup 51 5 -46 varvalue 709 596 -113 evalfun 456 270 -186 localcmd 364 44 -320 ------------------------------------------------------------------------------ (add/remove: 5/2 grow/shrink: 3/11 up/down: 724/-761) Total: -37 bytes text data bss dec hex filename 915353 485 6888 922726 e1466 busybox_old 915320 485 6880 922685 e143d busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Fix loss of variables when hash collidesDenys Vlasenko
Upstream commit: Date: Tue, 6 Jul 2010 17:40:53 +0800 [VAR] Fix loss of variables when hash collides Brian Koropoff reported that the new var patches broke the following script: #!/bin/dash GDM_LANG="bar" OPTION="foo" unset GDM_LANG # OPTION has mysteriously become unset echo "$OPTION" He correctly diagnosed this as a result of removing all variables in the hash chain preceding the one that should be removed in setvareq. He also provided a patch to fix this. This patch is based on his but without keeping the original vpp. As a result, we now store new variables at the end of the hash chain instead of the beginning. To make this work, setvareq/setvar now returns the vp pointer modified. In case they're used to unset a variable the pointer returned is undefined. This is because mklocal needs it and used to get it by assuming that the new variable always appear at the beginning of the chain. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Do not poplocalvars prematurely on regular utilitiesDenys Vlasenko
Upstream commit: Date: Thu, 27 May 2010 11:50:19 +0800 [VAR] Do not poplocalvars prematurely on regular utilities The recent cmdenviron removal broke regular utilities by calling poplocalvars too early. This patch fixes that by postponing the poplocalvars for regular utilities until they have completed. In order to ensure that local still works, it is now a special built-in. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Fix poplocalvar on abnormal exit from functionDenys Vlasenko
Upstream commit: Date: Thu, 27 May 2010 11:32:55 +0800 [VAR] Fix poplocalvar on abnormal exit from function The new localvar code broke the abnormal exit from functions and built-ins by not restoring the original localvar state. This patch fixes this by storing the previous localvar state so that we always unwind correctly in case of an abnormal exit. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Replace cmdenviron with localvarsDenys Vlasenko
Upstream commit: Date: Wed, 26 May 2010 18:54:19 +0800 [VAR] Replace cmdenviron with localvars This patch replaces the cmdenviron mechanism for temporary command variables with the localvars mechanism used by functions. This reduces code size, and more importantly, makes the variable assignment take effect immediately as required by POSIX. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Fix poplocalvar leakDenys Vlasenko
Upstream commit: Date: Tue, 25 May 2010 18:14:32 +0800 [VAR] Fix poplocalvar leak When a variable is marked as local, we set VSTRFIXED on its vp recored. However, poplocalvar never clears this flag for variables that were unset to begin with. Thus if you ever made an unset variable local, it would get the VSTRFIXED bit and stick around forever. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Add localvars nestingDenys Vlasenko
Upstream commit: Date: Mon, 24 May 2010 15:31:27 +0800 [VAR] Add localvars nesting This patch adds localvars nesting infrastructure so we can reuse the localvars mechanism for command evaluation. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: alloc slightly smaller buffer in cvtnum(); faster unsetvar()Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: fix redir_leak.tests if STANDALONE=yDenys Vlasenko
If STANDALONE and we run a NOEXEC applet, saved copies of redirected fds were visible for the child. They have CLOEXEC bit, yes, but we do not exec in this case. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26shell: remove ${#+} tests, it is not a valid constructDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26hush: fix ${##}, ${#?}, ${#!} handlingDenys Vlasenko
function old new delta parse_dollar 786 820 +34 expand_one_var 1579 1592 +13 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 47/0) Total: 47 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: [SHELL] Optimize dash -c "command" to avoid a forkDenys Vlasenko
Upstream commit: Date: Thu, 7 Jul 2011 13:58:48 +0800 [SHELL] Optimize dash -c "command" to avoid a fork On Sun, Apr 10, 2011 at 07:36:49AM +0000, Jonathan Nieder wrote: > From: Jilles Tjoelker <jilles@stack.nl> > Date: Sat, 13 Jun 2009 16:17:45 -0500 > > This change only affects strings passed to -c, when the -s option is > not used. > > Use the EV_EXIT flag to inform the eval machinery that the string > being passed is the entirety of input. This way, a fork may be > omitted in many special cases. > > If there are empty lines after the last command, the evalcmd will not > see the end early enough and forks will not be omitted. The same thing > seems to happen in bash. > > Example: > sh -c 'ps lT' > No longer shows a shell process waiting for ps to finish. > > [jn: ported from FreeBSD SVN r194128. Bugs are mine.] > > Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Instead of detecting EOF using the input layer, I'm going to use the parser instead. In either case, we always have to read ahead in order to complete the parsing of the previous node. Therefore we always know whether there is more to come, except in the case where we see a newline/semicolon or similar. For the purposes of sh -c, this should be sufficient. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> function old new delta evalstring 190 224 +34 ash_main 1014 1022 +8 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 42/0) Total: 42 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: allow "trap NUM [SIG]..." syntaxDenys Vlasenko
While at it, make get_signum() return -1 for numeric strings >= NSIG. function old new delta trapcmd 292 306 +14 get_signum 295 300 +5 builtin_trap 413 412 -1 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/1 up/down: 19/-1) Total: 18 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: [REDIR] Replace GPL noclobberopen code with the FreeBSD versionDenys Vlasenko
Upstream commit: Date: Thu, 10 Mar 2011 16:52:13 +0800 [REDIR] Replace GPL noclobberopen code with the FreeBSD version Replace noclobberopen() from bash with the FreeBSD code for noclobber opens. This also reduces code size by eliminating an unnecessary check. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> function old new delta changepath 192 194 +2 localcmd 366 364 -2 expmeta 521 517 -4 redirect 1210 1135 -75 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/3 up/down: 2/-81) Total: -79 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: sync up with dash with respect to redirection escapingDenys Vlasenko
We fixed the problem differently than they. Let's not deviate. Upstream commit: Date: Thu, 27 May 2010 20:07:29 +1000 [EXPAND] Fix corruption of redirections with byte 0x81 In other ash variants, a partial implementation of ksh-like cmd >file* adds and removes CTLESC bytes ('\x81') in redirection filenames, preserving 8-bit transparency. Long ago, dash removed the code to add the CTLESC bytes, but not the code to remove them, causing corruption of filenames containing CTLESC. This commit removes the code to remove the CTLESC bytes. The CTLESC byte occurs frequently in UTF-8 encoded non-Latin text. This bug has been reported various times to Ubuntu and Debian (e.g. Launchpad Ubuntu #422298). This patch is the same as the one submitted by Alexander Korolkov in Ubuntu #422298. Signed-off-by: Jilles Tjoelker <jilles@stack.nl> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> function old new delta changepath 194 192 -2 expandarg 1000 984 -16 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-18) Total: -18 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: [VAR] Move unsetvar functionality into setvareqDenys Vlasenko
Upstream commit: Date: Tue, 25 May 2010 20:55:05 +0800 [VAR] Move unsetvar functionality into setvareq This patch moves the unsetvar code into setvareq so that we can no have a pathological case of an unset variable hanging around unless it has a bit pinning it like VEXPORT. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> function old new delta setvareq 227 303 +76 expmeta 517 521 +4 localcmd 364 366 +2 unsetcmd 96 76 -20 unsetvar 129 7 -122 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/2 up/down: 82/-142) Total: -60 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: import param_expand_default.tests from hushDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25hush: treat ${#?} as "length of $?"Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: add a few tests from hush-vars/*Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24ash: fix comment, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24ash: copy three tests from hush_test/hush-signals/*Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24shell: some additions to *sh-misc/* testsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24ash: add most of hush process subst testsDenys Vlasenko
ash passes these. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24hush: fix a case when redirect to a closed fd #1 is not restoring (closing) itDenys Vlasenko
function old new delta setup_redirects 200 245 +45 append_squirrel - 41 +41 save_fds_on_redirect 256 221 -35 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/1 up/down: 86/-35) Total: 51 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24ash: add all hush parsing tests to ast testsDenys Vlasenko
All pass. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24hush: use mempcpy where usefulDenys Vlasenko
function old new delta o_addblock 58 42 -16 expand_one_var 1618 1555 -63 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-79) Total: -79 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-23ash: fix for last commitDenys Vlasenko
"mempcpy(q, s, len) + len" is obviously no good :( Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-23ash: use mempcpy() in more placesDenys Vlasenko
Most changes are taken from dash. function old new delta single_quote 127 129 +2 stack_nputstr 28 29 +1 path_advance 209 202 -7 rmescapes 346 308 -38 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/2 up/down: 3/-45) Total: -42 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-21ash: use mempcpy() where appropriateDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-21ash: suppress readonly1.tests false positive; add readonly0.testsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-21ash: improve set -x to quote strings as necessaryDenys Vlasenko
Basen on the patch from Martijn Dekker <martijn@inlv.org> function old new delta evalcommand 1161 1302 +141 maybe_single_quote - 60 +60 getoptscmd 527 546 +19 readtoken1 2819 2823 +4 localcmd 366 364 -2 evaltreenr 495 479 -16 evaltree 495 479 -16 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 3/3 up/down: 224/-34) Total: 190 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-21config: deindent all help textsDenys Vlasenko
Those two spaces after tab have no effect, and always a nuisance when editing. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-20shell: optional support for read -t N.NNN, closes 10101Denys Vlasenko
function old new delta shell_builtin_read 1097 1277 +180 dump_procs 353 359 +6 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18ash: remove contradicting size info in config helpDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18hush: remove contradicting size info in config helpDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18Update menuconfig items with approximate applet sizesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18hush: tweak "help" outputDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18hush: fix readonly2.tests failureDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18hush: another testcase for "READONLY_VAR=VAL BLTIN ..."Denys Vlasenko
Currently fails. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18hush: do not assign to readonly VAR in "VAR=VAL CMD" syntax tooDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18hush: add readonly testcase, fix falloutDenys Vlasenko
function old new delta helper_export_local 185 214 +29 run_pipe 1549 1560 +11 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 40/0) Total: 40 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18hush: convert exp/ro/local parameters to bitfields in one flag paramDenys Vlasenko
function old new delta helper_export_local 174 185 +11 set_local_var 424 420 -4 run_list 1048 1044 -4 set_vars_and_save_old 88 83 -5 set_local_var_from_halves 27 22 -5 run_pipe 1554 1549 -5 builtin_export 173 168 -5 set_pwd_var 40 34 -6 builtin_readonly 70 64 -6 expand_one_var 1625 1618 -7 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/9 up/down: 11/-47) Total: -36 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-17hush: HUSH_READONLY depends on HUSHDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-17hush: forgot to emit error on (failing) second "readonly VAR=VAL"Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-17hush: smaller code in !READONLY configsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-17hush: implement "readonly" builtinDenys Vlasenko
function old new delta builtin_readonly - 70 +70 helper_export_local 152 174 +22 bltins1 348 360 +12 expand_one_var 1620 1625 +5 builtin_export 168 173 +5 set_pwd_var 36 40 +4 set_local_var 410 414 +4 set_vars_and_save_old 85 88 +3 set_local_var_from_halves 24 27 +3 run_pipe 1551 1554 +3 run_list 1046 1048 +2 builtin_type 116 114 -2 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 10/1 up/down: 133/-2) Total: 131 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-17ash: more general format ${var:EXPR:EXPR}Denys Vlasenko
function old new delta subevalvar 1171 1202 +31 localcmd 364 366 +2 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-17ash: "you disabled math" is wrong: user did not disable it, builder of ash didDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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