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Re: set -e vs. !


From: Eric Blake
Subject: Re: set -e vs. !
Date: Fri, 08 Sep 2006 08:11:02 -0600
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According to Dan Jacobson on 9/8/2006 5:42 AM:
> $ cat t.sh
> set -ex
> ! true #should stop here but doesn't!?!
> ! false
> true
> false
> : already quit
> $ bash t.sh
> + true
> + false
> + true
> + false
> $ pdksh t.sh
> + true

Bash is right.  This is a bug in pdksh; report it there.

POSIX requires:
- -e
    When this option is on, if a simple command fails for any of the
reasons listed in Consequences of Shell Errors or returns an exit status
value >0, and is not part of the compound list following a while, until,
or if keyword, and is not a part of an AND or OR list, and is not a
pipeline preceded by the ! reserved word, then the shell shall immediately
exit.

- --
Life is short - so eat dessert first!

Eric Blake             address@hidden
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