71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by John Birrell.
|
|
* 4. Neither the name of the author nor the names of any co-contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#include <unistd.h>
|
|
#include <pthread.h>
|
|
#include "pthread_private.h"
|
|
|
|
__weak_reference(_dup, dup);
|
|
|
|
int
|
|
_dup(int fd)
|
|
{
|
|
int ret;
|
|
|
|
/* Lock the file descriptor: */
|
|
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
|
|
/* Perform the 'dup' syscall: */
|
|
if ((ret = __sys_dup(fd)) < 0) {
|
|
}
|
|
/* Initialise the file descriptor table entry: */
|
|
else if (_thread_fd_table_init(ret) != 0) {
|
|
/* Quietly close the file: */
|
|
__sys_close(ret);
|
|
|
|
/* Reset the file descriptor: */
|
|
ret = -1;
|
|
} else {
|
|
/*
|
|
* Save the file open flags so that they can be
|
|
* checked later:
|
|
*/
|
|
_thread_fd_table[ret]->flags = _thread_fd_table[fd]->flags;
|
|
}
|
|
|
|
/* Unlock the file descriptor: */
|
|
_FD_UNLOCK(fd, FD_RDWR);
|
|
}
|
|
/* Return the completion status: */
|
|
return (ret);
|
|
}
|