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* eval: Return status in eval functionsHerbert Xu2016-09-02
| | | | | | | | | | The exit status is currently clobbered too early for case statements and loops. This patch fixes it by making the eval functions return the current exit status and setting them in one place -- evaltree. Harald van Dijk pointed out a number of bugs in the original patch. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [BUILTIN] Return without arguments in a trap should use status outside trapsHerbert Xu2014-10-06
| | | | | | | | | | | | | POSIX now requires that return without arguments in a trap should return the last command status prior to executing traps. This patch implements this behaviour. Incidentally this also changes the behaviour of return without arguments in a loop conditional to use the last exit status in the body as opposed to the last command in the conditional when there is one. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [BUILTIN] Exit without arguments in a trap should use status outside trapsHerbert Xu2014-10-06
| | | | | | | | POSIX now requires that exit without arguments in a trap should return the last command status prior to executing traps. This patch implements this behaviour. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [BUILTIN] Merge SKIPFUNC/SKIPFILE and only clear SKIPFUNC when leaving dotcmdHerbert Xu2011-07-09
| | | | | | | | | | | | | | | | Currently upon leaving a dotcmd the evalskip state is reset so if a continue/break statement is used within a dot script it would have no effect outside of the dot script. This is inconsistent with other shells. This patch is based on one by Jilles Tjoelker and only clears SKIPFUNC when leaving a dot script. As a result continue/break will remain in effect. It also merges SKIPFUNC/SKIPFILE as they have no practical difference. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [SHELL] Optimize dash -c "command" to avoid a forkHerbert Xu2011-07-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* [VAR] Replace cmdenviron with localvarsHerbert Xu2010-05-26
| | | | | | | | | | 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>
* [EVAL] Revert SKIPEVAL into EXEXITHerbert Xu2009-08-11
| | | | | | | Now that eval handles EV_TESTED correctly, we can remove the SKIPEVAL hack and simply use EXEXIT for set -e. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* Fixed gcc 4.0 compilation problemsHerbert Xu2005-10-29
| | | | | | | | Removed obsolete extern declaration on funcnest. This conflits with the correct static definition. Changed memtodest prototype to use char * instead of unsigned char *. Perform the unsigned char cast inside memtodest instead.
* Copyright/licence updates and remove all traces of sys/cdefs.hHerbert Xu2005-10-29
| | | | | | | | | | | This change updates the BSD licence to the three-clause version since NetBSD has already done so. This makes dash GPL-compatible. It also adds Christos Zoulas (NetBSD ash maintainer) to the COPYING file. I've added "copyright by Herbert Xu" to most files. Finally all CVS IDs and inclusion of sys/cdefs.h have been removed. The latter is needed for support of klibc.
* Added eflag fixes for trap and minusc.herbert2005-09-26
| | | | | | Let evaltree handle traps from cmdloop. Reset evalskip after minusc is executed. Stop executing traps once SKIPEVAL is seen.
* Turn evalskip into a bit field.herbert2005-09-26
| | | | This allows SKIPEVAL and SKIPFUNC to coexist which is needed for eval return 1.
* Replaced EXEVAL with SKIPEVAL.herbert2005-09-26
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* Initial import.Herbert Xu2005-09-26