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Date: Mon, 6 Nov 2006 06:56:00 -0500
From: Christopher Faylor <cgf-no-personal-reply-please AT cygwin DOT com>
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Subject: Re: why doesn't "exec" replace current executable w/new
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On Mon, Nov 06, 2006 at 11:51:20AM -0000, Dave Korn wrote:
>On 06 November 2006 11:46, Linda Walsh wrote:
>>So why the top level bash?  Is there anything the parent bash can do
>>that the child bash cannot?
>
>The obvious WAG would be "wait for SIGCHLD, meaningfully" :)

Well, there's that, and there's also the fact that Cygwin has to emulate
exec.  It's not a Windows function.  There is no way to tell, e.g., a
Windows command shell to keep waiting for a new process that has been
execed without keeping the old one around.

See CreateProcess and the WaitFor* functions.

cgf

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