Date: Wed, 2 Nov 2011 16:37:06 -0400 From: Ryan Stone <rysto32@gmail.com> To: Mark Saad <nonesuch@longcount.org> Cc: freebsd-hackers@freebsd.org Subject: Re: What is going on with ash / sh Message-ID: <CAFMmRNziiMbD8FS_868bfPCBBFOUkKOd%2BxS=A%2BAwkVEhPEiyBQ@mail.gmail.com> In-Reply-To: <CAMXt9NYcO4JsZRUr_TVzoE08F7hyED4EUM5RBH2w6gC5_NSe5Q@mail.gmail.com> References: <CAMXt9NYcO4JsZRUr_TVzoE08F7hyED4EUM5RBH2w6gC5_NSe5Q@mail.gmail.com>
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On Wed, Nov 2, 2011 at 4:28 PM, Mark Saad <nonesuch@longcount.org> wrote: > Hackers > What 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 > > > # sh xxx > 88318 p0 S+ 0:00.00 sh xxx > 88320 p0 R+ 0:00.00 sh xxx > 88321 p0 R+ 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?help
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