Article View: comp.os.msdos.programmer
Article #5837Re: Sensing STDOUT redirection in C
From: James Birdsall
Date: Thu, 18 Apr 1991 16:58
Date: Thu, 18 Apr 1991 16:58
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1409 bytes
In article <1991Apr16.145847.20316@midway.uchicago.edu> valley@gsbsun.uchicago.edu (Doug Dougherty) writes:
>collinsa@p4.cs.man.ac.uk (Adrian Collins) writes:
>>Does anybody know how to sense whether output redirection has been used
>>on the command line?
>isatty(1)
>(Works in Turbo C)
Well, almost. isatty() returns true if the supplied handle is the
console *or* a printer or serial port. Determining whether the handle is
actually the console or not requires an ioctl() and checking some bits.
--
James W. Birdsall WORK: jwbirdsa@amc.com {uunet,uw-coco}!amc-gw!jwbirdsa
HOME: {uunet,uw-coco}!amc-gw!picarefy!jwbirdsa OTHER: 71261.1731@compuserve.com
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<1991Apr18.165820.6035@amc.com>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!milton!sumax!amc-gw!jwbirdsaReferences:
<collinsa.671721083@p4.cs.man.ac.uk> <1991Apr16.145847.20316@midway.uchicago.edu>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!milton!sumax!amc-gw!jwbirdsa From: jwbirdsa@amc.com (James Birdsall) Newsgroups: comp.os.msdos.programmer Subject: Re: Sensing STDOUT redirection in C Keywords: STDOUT, Redirection, MSDOS Message-ID: <1991Apr18.165820.6035@amc.com> Date: 18 Apr 91 16:58:20 GMT References: <collinsa.671721083@p4.cs.man.ac.uk> <1991Apr16.145847.20316@midway.uchicago.edu> Reply-To: jwbirdsa@europa.amc.com (James Birdsall) Organization: Applied Microsystems, Redmond, WA Lines: 16