Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!eecae!tank!mimsy!chris
From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.unix.wizards
Subject: Re: shell script puzzler
Keywords: /bin/sh
Message-ID: <16489@mimsy.UUCP>
Date: 22 Mar 89 10:47:18 GMT
References: <995@etnibsd.UUCP>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 15

In article <995@etnibsd.UUCP> vsh@etnibsd.UUCP (Steve Harris) writes:
>Here is one for the shell programming gurus:  given the following
>shell script, how can I get the subshell to echo its true pid??
>(I am running SunOS 3.4, if it matters).

>#! /bin/sh
>echo $$			# echos pid of parent shell
>( echo $$ )		# echos same pid

At least in 4BSD, you cannot.  `sh' sets up `$$' near the top of main()
and never changes it (except when running a script, in lieu of starting
a new /bin/sh to run it).
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris