Path: utzoo!attcan!uunet!seismo!sundc!pitstop!sun!decwrl!labrea!rutgers!uwvax!oddjob!mimsy!chris
From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.unix.questions
Subject: Re: Login shell?
Message-ID: <13851@mimsy.UUCP>
Date: 4 Oct 88 14:51:50 GMT
References: <3ed799bc.103e8@hi-csc.UUCP>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 26

In article <3ed799bc.103e8@hi-csc.UUCP> mukul@hi-csc.UUCP (Mukul Agrawal)
writes:
>Is there a way ( /bin/csh , Sun Unix 3.4 ) to find out if the shell
>that is running is a login shell or not, just like one can use
>"$?prompt" to find out whether or not it is an interactive shell.

This is not completely foolproof, but will usually do the trick.
In your .cshrc:

	if ($?CSHDEPTH) then
		@ depth = $CSHDEPTH + 1
		setenv CSHDEPTH $depth
		unset depth
	else
		setenv CSHDEPTH 1
	endif

For Bourne shell users, in .profile:

	SHDEPTH=`expr ${SHDEPTH-0} + 1`; export SHDEPTH

It should be obvious how to modify this for a simple yes/no test,
although I prefer the more general solution.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris