Login shell?

[Maarten Litmaath]

In article <1217 at vsedev.VSE.COM> logan at vsedev.VSE.COM (James Logan III) writes:
\... If you just want to find out what if the current
\shell is indeed the shell spawned by init(1M) (via getty(1M), login(1)),
\then just write a simple C program like this:
\--------
\#include <stdio.h>
\
\main()
\{
\	if (getppid() == getpgrp())
\		exit(0);
\	exit(1);
\}

1)
	Why #include <stdio.h>?
2)
	This scheme won't work for rsh/rlogin.
-- 
George Bush:                          |Maarten Litmaath @ VU Amsterdam:
             Capt. Slip of the Tongue |maart at cs.vu.nl, mcvax!botter!maart