From 020684e443a1f78e36f1eaa4db5c133150e2f026 Mon Sep 17 00:00:00 2001 From: jilles Date: Fri, 16 Aug 2013 13:10:30 +0000 Subject: Add dup3(), based on F_DUP2FD and F_DUP2FD_CLOEXEC fcntls. I removed functionality not proposed for POSIX in Austin group issue #411. A man page (my own) and test cases will follow in later commits. PR: 176233 Submitted by: Jukka Ukkonen --- lib/libc/gen/dup3.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 lib/libc/gen/dup3.c (limited to 'lib/libc/gen/dup3.c') diff --git a/lib/libc/gen/dup3.c b/lib/libc/gen/dup3.c new file mode 100644 index 0000000..ac8877c --- /dev/null +++ b/lib/libc/gen/dup3.c @@ -0,0 +1,59 @@ +/*- + * Copyright (c) 2012 Jukka A. Ukkonen + * All rights reserved. + * + * This software was developed by Jukka Ukkonen for FreeBSD. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include "namespace.h" +#include +#include +#include +#include "un-namespace.h" + +int +__dup3(int oldfd, int newfd, int flags) +{ + int how; + + if (oldfd == newfd) { + errno = EINVAL; + return (-1); + } + + if (flags & ~O_CLOEXEC) { + errno = EINVAL; + return (-1); + } + + how = (flags & O_CLOEXEC) ? F_DUP2FD_CLOEXEC : F_DUP2FD; + + return (_fcntl(oldfd, how, newfd)); +} + +__weak_reference(__dup3, dup3); +__weak_reference(__dup3, _dup3); -- cgit v1.1