Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!sm.unisys.com!ism780c!haddock!karl
From: karl@haddock.ima.isc.com (Karl Heuer)
Newsgroups: comp.lang.c
Subject: Re: getting users' tty # into a C program
Summary: don't bother with popen()
Message-ID: <11958@haddock.ima.isc.com>
Date: 6 Mar 89 19:48:37 GMT
References: <441@lakesys.UUCP> <9794@smoke.BRL.MIL> <52746@yale-celray.yale.UUCP> <4418@pt.cs.cmu.edu>
Reply-To: karl@haddock.ima.isc.com (Karl Heuer)
Organization: Interactive Systems, Boston
Lines: 11

>FILE *f;
>f=popen("/usr/bin/tty","r"); fscanf(f,"%s",ttyname); pclose(f)

Better, but it should probably be noted that this is LESS likely to work than
the ttyname() function it's covering for.  (I'd be extremely surprised to hear
of a system where this works, but ttyname() doesn't.)

Use ttyname().  It isn't in the pANS, of course, but it's still more portable
than any form of the popen() hack.

Karl W. Z. Heuer (ima!haddock!karl or karl@haddock.isc.com), The Walking Lint