From owner-freebsd-questions  Sat May 24 17:52:30 1997
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To: Paul Traina <pst@shockwave.com>
cc: questions@FreeBSD.ORG
Subject: Re: execve() and the actual name of the image executed 
In-reply-to: Your message of "Sat, 24 May 1997 16:01:22 PDT."
             <199705242301.QAA19073@precipice.shockwave.com> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Sat, 24 May 1997 17:53:05 -0700
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>The parameters passed to execve include the filename that you wish
>to exec, followed by the argv and envp structures.  A quick perusal
>of kern_exec.s shows the kernel copying the argv and envp structures
>to the new process area,  but it appears as if the path to the
>executable is lost.

   Yup.

>Is there any /absolutely guaranteed/ way to get a pointer to the/a path
>that was actually used to invoke an image from that image?

   /proc/<pid>/file is one way. This only works on FreeBSD 2.2+, however.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project