Path: utzoo!utgpu!water!watmath!clyde!rutgers!rochester!cornell!uw-beaver!mit-eddie!husc6!cmcl2!brl-adm!brl-smoke!gwyn
From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: comp.unix.questions
Subject: Re: How does a program get its path name?
Message-ID: <7304@brl-smoke.ARPA>
Date: 21 Feb 88 11:33:50 GMT
References: <11923@brl-adm.ARPA>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 12

In article <11923@brl-adm.ARPA> Leisner.Henr@xerox.com (marty) writes:
>How does an exec program get the pathname it was execed from if it wants to find
>out this information?

That information is not generally available to the process.

>(I'm specifically asking how cc knows to looks at ../lib for the compiler
>passes).

I don't know of any "cc"s that work like that.  Usually the pathnames
of the slave programs are hard-wired into the "cc" code, although
they're sometimes configurable via the makefile for cc when it's built.