From owner-freebsd-questions  Mon May 26 09:30:20 1997
Return-Path: <owner-questions>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id JAA27084
          for questions-outgoing; Mon, 26 May 1997 09:30:20 -0700 (PDT)
Received: from precipice.shockwave.com (ppp-206-170-5-9.rdcy01.pacbell.net [206.170.5.9])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id JAA27061
          for <questions@FreeBSD.ORG>; Mon, 26 May 1997 09:30:13 -0700 (PDT)
Received: from shockwave.com (localhost [127.0.0.1]) by precipice.shockwave.com (8.8.5/8.7.3) with ESMTP id JAA29924; Mon, 26 May 1997 09:29:40 -0700 (PDT)
Message-Id: <199705261629.JAA29924@precipice.shockwave.com>
To: dg@root.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 17:53:05 PDT."
             <199705250053.RAA16879@implode.root.com> 
Date: Mon, 26 May 1997 09:29:40 -0700
From: Paul Traina <pst@shockwave.com>
Sender: owner-questions@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

Thanks David, that hit the spot.

  From: David Greenman <dg@root.com>
  Subject: Re: execve() and the actual name of the image executed 
  >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