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Date: Wed, 2 Nov 2011 16:37:06 -0400
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From: Ryan Stone <rysto32@gmail.com>
To: Mark Saad <nonesuch@longcount.org>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: What is going on with ash / sh
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On Wed, Nov 2, 2011 at 4:28 PM, Mark Saad <nonesuch@longcount.org> wrote:
> Hackers
> =A0What is going on here, if I run the following shell script, what is
> the expected output . The script is named xxx
>
> #!/bin/sh
> ps -ax | grep -v grep | grep xxx
>
> Here is what I see
>
>
> =A0# sh xxx
> 88318 =A0p0 =A0S+ =A0 =A0 0:00.00 sh xxx
> 88320 =A0p0 =A0R+ =A0 =A0 0:00.00 sh xxx
> 88321 =A0p0 =A0R+ =A0 =A0 0:00.00 sh xxx
>
>
> Can someone explain this ?

ps is happening to run after sh has forked off the two grep processes
but before they exec'ed grep?