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author | jilles <jilles@FreeBSD.org> | 2013-08-16 13:10:30 +0000 |
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committer | jilles <jilles@FreeBSD.org> | 2013-08-16 13:10:30 +0000 |
commit | 020684e443a1f78e36f1eaa4db5c133150e2f026 (patch) | |
tree | 30e10959c2614937a6af2cbc13a825ae2194ae9d /lib/libc/gen/dup3.c | |
parent | 5e5b39c47eb6fbcf9e6eeeecaa13a84dca61e7e4 (diff) | |
download | FreeBSD-src-020684e443a1f78e36f1eaa4db5c133150e2f026.zip FreeBSD-src-020684e443a1f78e36f1eaa4db5c133150e2f026.tar.gz |
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
Diffstat (limited to 'lib/libc/gen/dup3.c')
-rw-r--r-- | lib/libc/gen/dup3.c | 59 |
1 files changed, 59 insertions, 0 deletions
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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "namespace.h" +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> +#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); |