Date: Mon, 5 May 1997 10:13:27 +0200 (MET DST) From: Zahemszky Gabor <zgabor@CoDe.hu> To: freebsd-questions@freebsd.org (FreeBSD questions) Cc: un_x@anchorage.net Subject: Re: sh - lists, pipes & exits Message-ID: <199705050813.KAA00481@CoDe.hu> In-Reply-To: <Pine.BSF.3.95q.970429032611.8526A-100000@aak.anchorage.net> from Steve Howe at "Apr 29, 97 03:37:41 am"
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>
> how can i return an exit value (to the invokers shell) of a command in a
> list which gets piped into "more" ...
>
> { gcc 2>&1 see.c; xit=$?; if [ $xit ]; then exit $xit; fi; } | more
> -------------------------------------------------------------------------
> of course, "xit" ends up getting "wiped", and more is executed regardless.
> i can't figure out how to do this without executing gcc 2x ...
> such as follows ...
> -------------------------------------------------------------------------
> gcc 1>&- 2>&- see.c; xit=$?
> if [ $xit != 0 ]; then blah; blah; exit $xit
> else gcc 2>&1 see.c | more
> fi
>
>
1)
$ { gcc see.c ; echo $? > /tmp/compiler.out.$$ ; } | more ; xit=`cat
/tmp/compiler.out.$$ ; rm -f /tmp/compiler.out.$$`
2) Look around in ksh's (zsh/bash cannot do it!) coprocesses and the wait
command (well, I tried it, but couldn't find a quick answer).
Gabor
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