Date: Fri, 16 Aug 2013 13:16:27 +0000 (UTC) From: Jilles Tjoelker <jilles@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r254410 - in head/lib/libc: gen sys Message-ID: <201308161316.r7GDGReP080931@svn.freebsd.org>
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Author: jilles Date: Fri Aug 16 13:16:27 2013 New Revision: 254410 URL: http://svnweb.freebsd.org/changeset/base/254410 Log: Add man page dup3(3). Added: head/lib/libc/gen/dup3.3 (contents, props changed) Modified: head/lib/libc/gen/Makefile.inc head/lib/libc/sys/dup.2 Modified: head/lib/libc/gen/Makefile.inc ============================================================================== --- head/lib/libc/gen/Makefile.inc Fri Aug 16 13:10:30 2013 (r254409) +++ head/lib/libc/gen/Makefile.inc Fri Aug 16 13:16:27 2013 (r254410) @@ -185,6 +185,7 @@ MAN+= alarm.3 \ dlinfo.3 \ dllockinit.3 \ dlopen.3 \ + dup3.3 \ err.3 \ exec.3 \ feature_present.3 \ Added: head/lib/libc/gen/dup3.3 ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/lib/libc/gen/dup3.3 Fri Aug 16 13:16:27 2013 (r254410) @@ -0,0 +1,120 @@ +.\" Copyright (c) 1980, 1991, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)dup.2 8.1 (Berkeley) 6/4/93 +.\" $FreeBSD$ +.\" +.Dd August 16, 2013 +.Dt DUP3 3 +.Os +.Sh NAME +.Nm dup3 +.Nd duplicate an existing file descriptor +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In fcntl.h +.In unistd.h +.Ft int +.Fn dup3 "int oldd" "int newd" "int flags" +.Sh DESCRIPTION +The +.Fn dup3 +function +duplicates an existing object descriptor +while allowing the value of the new descriptor to be specified. +.Pp +The close-on-exec flag on the new file descriptor is determined by the +.Dv O_CLOEXEC +bit in +.Fa flags . +.Pp +If +.Fa oldd +\*(Ne +.Fa newd +and +.Fa flags +== 0, +the behavior is identical to +.Li dup2(oldd, newd) . +.Pp +If +.Fa oldd +== +.Fa newd , +then +.Fn dup3 +fails, unlike +.Xr dup2 2 . +.Sh RETURN VALUES +The value -1 is returned if an error occurs. +The external variable +.Va errno +indicates the cause of the error. +.Sh ERRORS +The +.Fn dup3 +function fails if: +.Bl -tag -width Er +.It Bq Er EBADF +The +.Fa oldd +argument is not a valid active descriptor or the +.Fa newd +argument is negative or exceeds the maximum allowable descriptor number +.It Bq Er EINVAL +The +.Fa oldd +argument is equal to the +.Fa newd +argument. +.It Bq Er EINVAL +The +.Fa flags +argument has bits set other than +.Dv O_CLOEXEC . +.El +.Sh SEE ALSO +.Xr accept 2 , +.Xr close 2 , +.Xr dup2 2 , +.Xr fcntl 2 , +.Xr getdtablesize 2 , +.Xr open 2 , +.Xr pipe 2 , +.Xr socket 2 , +.Xr socketpair 2 +.Sh STANDARDS +The +.Fn dup3 +function does not conform to any standard. +.Sh HISTORY +The +.Fn dup3 +function appeared in +.Fx 10.0 . Modified: head/lib/libc/sys/dup.2 ============================================================================== --- head/lib/libc/sys/dup.2 Fri Aug 16 13:10:30 2013 (r254409) +++ head/lib/libc/sys/dup.2 Fri Aug 16 13:16:27 2013 (r254410) @@ -151,7 +151,8 @@ argument is negative or exceeds the maxi .Xr open 2 , .Xr pipe 2 , .Xr socket 2 , -.Xr socketpair 2 +.Xr socketpair 2 , +.Xr dup3 3 .Sh STANDARDS The .Fn dup
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