Date: Sat, 4 Aug 2007 13:23:07 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: RW <fbsd06@mlists.homeunix.com> Cc: questions@freebsd.org Subject: Re: How does Sendmail know how it was invoked? Message-ID: <20070804182307.GD77822@dan.emsphone.com> In-Reply-To: <20070804190634.69234e1e@gumby.homeunix.com.> References: <20070804190634.69234e1e@gumby.homeunix.com.>
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In the last episode (Aug 04), RW said: > mailwrapper checks to see how it was invoked and then looks up the > appropriate command in mailer.conf. All of the entries in > mailer.conf point to /usr/libexec/sendmail/sendmail, so how does that > binary know what it's supposed to do. The kernel passes the executable name to the running process along with the rest of the commandline arguments. If you run "ls -l /tmp", for example, the ls binary gets "ls", "-l", and "/tmp" as its arguments. See around line 360 of src/contrib/sendmail/src/main.c. http://www.freebsd.org/cgi/cvsweb.cgi/src/contrib/sendmail/src/main.c?annotate=HEAD -- Dan Nelson dnelson@allantgroup.com
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