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Re: fewer forks during shell detection
From: |
Eric Blake |
Subject: |
Re: fewer forks during shell detection |
Date: |
Tue, 11 Nov 2008 19:51:35 -0700 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.17) Gecko/20080914 Thunderbird/2.0.0.17 Mnenhy/0.7.5.666 |
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According to Ralf Wildenhues on 11/11/2008 12:35 PM:
> I haven't found a shell that needs this subshell, but this:
> $ echo '...' | ./foo 2>/dev/null
>
> causes this output from some bash versions:
> | bash: echo: write error: Broken pipe
But doesn't that only happen if ./foo exits prior to echo being able to
push all its output? I guess if the shell can't handle the input, it will
exit early, but maybe we could write this as:
echo '...' | { ./foo 2>/dev/null; as_status=$?; cat >/dev/null;
test $as_status = 0; }
so that there is something to consume all of the echo output? But I don't
think we have to worry about this unless we get actual reports of a noisy
echo.
- --
Don't work too hard, make some time for fun as well!
Eric Blake address@hidden
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