shell script puzzler

[Chris Torek]

In article <995 at etnibsd.UUCP> vsh at 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 at mimsy.umd.edu	Path:	uunet!mimsy!chris