From dattier@Mcs.Net Tue Mar 21 17:13:33 2000
Date: Sat, 18 Dec 1999 16:24:18 -0600 (CST)
From: David W. Tamkin <dattier@Mcs.Net>
To: Brian Dawson <b-dawson@tronicplanet.de>
Cc: procmail@informatik.rwth-aachen.de
Subject: Re: Need solution with procmail
Resent-Date: Sat, 18 Dec 1999 23:27:32 +0100 (MET)
Resent-From: procmail@informatik.rwth-aachen.de

Brian Dawson asked,

| Hello all, I have searched through the archive, but couldn't find anything
| relevant to my question. What I am interested in is being able to have
| procmail use a recipe not only based upon egrep of the mail header, but to
| also have the possibility to have a condition met based upon either the exit
| code of a process, or a return value.

Yes, procmail can do both.

To test if a process returns success (exit code 0), write a condition like
this:

 * ? command

or to test for failure,

 * ! ? command

To test for contents of a return value,

 some_variable=`command`

 :0 flags
 * some_variable ?? regexp
 action