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From: lwv@n8emr.UUCP
Newsgroups: comp.unix.questions
Subject: BSD and setpgrp()
Message-ID: <341@n8emr.UUCP>
Date: Fri, 20-Nov-87 09:54:46 EST
Article-I.D.: n8emr.341
Posted: Fri Nov 20 09:54:46 1987
Date-Received: Sun, 22-Nov-87 04:25:35 EST
Reply-To: lwv@n8emr.UUCP (Larry W. Virden)
Distribution: world
Organization: N8EMR's Ham BBS (HBBS), Columbus,Ohio
Lines: 20
Keywords: setpgrp system calls stdin
Summary: searching for a good description of BSD setpgrp()


I am in search of an explanation of setpgrp that covers several of the bases.
For instance, it appears that open file descriptors or pointers are clobbered
when a setpgrp() is executed.

For instance, saying:

setpgrp(0, getpid());
fgets(buff, stdin);

in a program causes the fgets to fail; some systems you get an EIO errno value
and others the program just hangs!

Are there other undocumented problems with using it that we should be aware of?
Where does one find the unwritten lore of using things like this?
-- 
Larry W. Virden	 75046,606 (CIS)
674 Falls Place, Reynoldsburg, OH 43068 (614) 864-8817
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