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From: dkeisen@leland.Stanford.EDU (Dave Eisen)
Newsgroups: comp.unix.questions,comp.unix.programmer
Subject: Re: How do I tell if STDIN is a PIPE?
Message-ID: <1991Jun3.175117.9882@leland.Stanford.EDU>
Date: 3 Jun 91 17:51:17 GMT
References: <653@eskimo.celestial.com> <1991Jun3.141144.23620@leland.Stanford.EDU> <1991Jun3.150851.21915@prl.dec.com>
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Organization: Sequoia Peripherals, Inc.
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In article <1991Jun3.150851.21915@prl.dec.com> boyd@prl.dec.com (Boyd Roberts) writes:
>You don't test for anything that way.  This:
>
>    if ((sb.st_mode & S_IFMT) == S_IFIFO)
>
>is the way it's done (unless you have those gory POSIX macros).  But,

Of course, it is (my brain slipped when I was typing and I wrote S_IFREG in
place of S_IFMT). That still doesn't change the point of my posting ---
on this machine (running ULTRIX 4.1), sb.stmode & S_IFMT is 0 for a pipe.



-- 
Dave Eisen                           dkeisen@leland.Stanford.EDU
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