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glibc/sysdeps/unix/sysv/linux/mq_open.c
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/* Copyright (C) 2004-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <mqueue.h> | |
#include <stdarg.h> | |
#include <stddef.h> | |
#include <stdio.h> | |
#include <sysdep.h> | |
#ifdef __NR_mq_open | |
/* Establish connection between a process and a message queue NAME and | |
return message queue descriptor or (mqd_t) -1 on error. OFLAG determines | |
the type of access used. If O_CREAT is on OFLAG, the third argument is | |
taken as a `mode_t', the mode of the created message queue, and the fourth | |
argument is taken as `struct mq_attr *', pointer to message queue | |
attributes. If the fourth argument is NULL, default attributes are | |
used. */ | |
mqd_t | |
__mq_open (const char *name, int oflag, ...) | |
{ | |
if (name[0] != '/') | |
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL); | |
mode_t mode = 0; | |
struct mq_attr *attr = NULL; | |
if (oflag & O_CREAT) | |
{ | |
va_list ap; | |
va_start (ap, oflag); | |
mode = va_arg (ap, mode_t); | |
attr = va_arg (ap, struct mq_attr *); | |
va_end (ap); | |
} | |
return INLINE_SYSCALL (mq_open, 4, name + 1, oflag, mode, attr); | |
} | |
strong_alias (__mq_open, mq_open); | |
mqd_t | |
__mq_open_2 (const char *name, int oflag) | |
{ | |
if (oflag & O_CREAT) | |
__fortify_fail ("invalid mq_open call: O_CREAT without mode and attr"); | |
return __mq_open (name, oflag); | |
} | |
#else | |
# include <rt/mq_open.c> | |
#endif |