Date: Wed, 25 Jul 2012 01:22:12 GMT From: David Korn <dgk@research.att.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/170125: tcsetgrp(fd) should fail when fd is a pipe Message-ID: <201207250122.q6P1MBBe021515@red.freebsd.org> Resent-Message-ID: <201207250130.q6P1UBbj016647@freefall.freebsd.org>
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>Number: 170125
>Category: kern
>Synopsis: tcsetgrp(fd) should fail when fd is a pipe
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jul 25 01:30:11 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: David Korn
>Release: 6.3-RELEASE-p13
>Organization:
AT&T
>Environment:
FreeBSD chud00.research.att.com 6.3-RELEASE-p13 FreeBSD 6.3-RELEASE-p13 #0: Thu Oct 1 22:30:50 UTC 2009 root@i386-builder.daemonology.net:/usr/obj/usr/src/sys/SMP i386 i386 i386 FreeBSD
>Description:
The tcgetpgrp() should fail with -1 and should set errno when the file descriptor is a pipe descriptor. It returns 0. Note that file descriptors created with socket pair do return -1. The program below outputs s=0 and errno=0, but it should output s=-1 and errno non-zero.
>How-To-Repeat:
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
int main(int argc, char *argv[])
{
int s,pv[2];
pipe(pv);
errno = 0;
s = tcgetpgrp(pv[1]);
fprintf(stderr,"s=%d errno=%d\n",s,errno);
return(0);
}
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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