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ash: add comment explaining "set -e; $(cmd)" discrepancy

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Denys Vlasenko 2016-10-25 18:12:15 +02:00
parent 6a94cee409
commit 960ca385b7
1 changed files with 8 additions and 0 deletions
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shell/ash.c
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@ -5924,6 +5924,14 @@ evalbackcmd(union node *n, struct backcmd *result)
copyfd(pip[1], 1 | COPYFD_EXACT); copyfd(pip[1], 1 | COPYFD_EXACT);
close(pip[1]); close(pip[1]);
} }
/* TODO: eflag clearing makes the following not abort:
* ash -c 'set -e; z=$(false;echo foo); echo $z'
* which is what bash does (unless it is in POSIX mode).
* dash deleted "eflag = 0" line in the commit
* Date: Mon, 28 Jun 2010 17:11:58 +1000
* [EVAL] Don't clear eflag in evalbackcmd
* For now, preserve bash-like behavior, it seems to be somewhat more useful:
*/
eflag = 0; eflag = 0;
evaltree(n, EV_EXIT); /* actually evaltreenr... */ evaltree(n, EV_EXIT); /* actually evaltreenr... */
/* NOTREACHED */ /* NOTREACHED */