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From: allbery@NCoast.ORG (Brandon S. Allbery KB8JRR/AA)
Newsgroups: comp.unix.wizards
Subject: Re: dup2 on Sys5r2 ish box
Message-ID: <1991Apr13.183314.8490@NCoast.ORG>
Date: 13 Apr 91 18:33:14 GMT
References: <2180@estevax.UUCP>
Reply-To: allbery@ncoast.ORG (Brandon S. Allbery KB8JRR/AA)
Followup-To: comp.unix.wizards
Organization: North Coast Public Access Un*x (ncoast)
Lines: 29

As quoted from <2180@estevax.UUCP> by iain@estevax.UUCP (Hr Iain Lea):
+---------------
| I am porting a program from BSD to a Sys5r2 ish derivative and need the
| dup2() function call.
+---------------

Is this one in the FAQ?

/*
 * Near-duplicate for dup2().  ("Near"?  We discussed this for a whole bloody
 * month --- I don't want to discuss it any more.  BSD and System V have
 * enough differing errno values that that part is pointless anyway.)
 *
 * Caveats: doesn't necessarily return the same errno values on failure; does
 * not leave f2 open if the dup fails.
 */

#include <ioctl.h>
#include <errno.h>

#define dup2(f1,f2) (close(f2),fcntl(f1,F_DUPFD,f2))

++Brandon

-- 
Me: Brandon S. Allbery			  Ham: KB8JRR/AA on 2m, 220, 440, 1200
Internet: allbery@NCoast.ORG		(QRT on HF until local problems fixed)
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