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Re: set -e is ineffective for subshells


From: Paul Jarc
Subject: Re: set -e is ineffective for subshells
Date: Tue, 16 Oct 2001 15:09:08 -0400
User-agent: Gnus/5.090004 (Oort Gnus v0.04) Emacs/20.7

Chet Ramey <address@hidden> wrote:
>> Repeat-By:
>>         bash -e '(exit 1); echo still here'
>
> POSIX.2 says that `set -e' causes the shell to exit if a simple
> command fails (subject to a few irrelevant conditions).  A subshell
> like `(exit 1)' is not a simple command.

This behavior is incomatible with traditional sh, and it makes it
harder to write correct, portable #!/bin/sh scripts.  Does POSIX
prohibit exiting in this case, or merely not require it?


paul



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