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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.unix-wizards
Subject: Re: A shell by any other name...
Message-ID: <4496@brl-tgr.ARPA>
Date: Sat, 8-Sep-84 21:20:31 EDT
Article-I.D.: brl-tgr.4496
Posted: Sat Sep  8 21:20:31 1984
Date-Received: Fri, 14-Sep-84 09:04:26 EDT
References: <754@aplvax.UUCP>
Organization: Ballistics Research Lab
Lines: 4

If the shell thinks it is a "login shell" then it will source .profile
before processing regular commands.  Usually this test is just that
argv[0] begins with a dash `-'.  Try linking sh to -sh, for example,
then invoking -sh.