Xref: utzoo comp.sys.att:8462 unix-pc.general:4496
Path: utzoo!utgpu!watserv1!watmath!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!mstar!crappie!karl
From: karl@MorningStar.Com (Karl Fox)
Newsgroups: comp.sys.att,unix-pc.general
Subject: Re: Uniquely identifying a user: is it possible?
Message-ID: <KARL.90Jan13104731@crappie.MorningStar.Com>
Date: 13 Jan 90 15:47:31 GMT
References: <25730@cup.portal.com> <1143@utoday.UUCP> <25845@cup.portal.com>
Sender: usenet@crappie.MorningStar.Com
Reply-To: karl@MorningStar.Com (Karl Fox)
Organization: Morning Star Technologies
Lines: 31
In-Reply-To: thad@cup.portal.com's message of 12 Jan 90 10:18:06 GMT

My UNIX-PC (3.51+Development) *does* have getpgrp().  I tried this quick
hack and haven't been able to make it fail yet.  It works while su'd,
nohup'ed and totally redirected.

# include	<sys/types.h>
# include	<utmp.h>

# define	SO	"\033[7m"
# define	SE	"\033[m"

main()
    {
    extern struct utmp *getutent();

    register int pgrp = getpgrp();
    register struct utmp *up;

    while (up = getutent())
	printf("%s%8s %4s %12s %5d %d %d/%d%s\n",
		pgrp == up -> ut_pid ? SO : "",
		up -> ut_user,
		up -> ut_id,
		up -> ut_line,
		up -> ut_pid,
		up -> ut_type,
		up -> ut_exit.e_termination,
		up -> ut_exit.e_exit,
		pgrp == up -> ut_pid ? SE : "");
    }
--
Karl Fox, Morning Star Technologies               karl@MorningStar.Com