freebsd-src/lib/libc_r/uthread/uthread_ioctl.c
2007-01-12 07:26:21 +00:00

82 lines
2.6 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. 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 <stdarg.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h> /* O_NONBLOCK*/
#include <pthread.h>
#include "pthread_private.h"
__weak_reference(_ioctl, ioctl);
int
_ioctl(int fd, unsigned long request,...)
{
int ret;
int flags;
int *op;
va_list ap;
/* Lock the file descriptor: */
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
/* Initialise the variable argument list: */
va_start(ap, request);
switch( request) {
case FIONBIO:
/*
* descriptors must be non-blocking; we are only
* twiddling the flag based on the request
*/
op = va_arg(ap, int *);
flags = _thread_fd_getflags(fd);
if (*op == 0)
flags &= ~O_NONBLOCK;
else
flags |= O_NONBLOCK;
_thread_fd_setflags(fd, flags);
ret = 0;
break;
default:
ret = __sys_ioctl(fd, request, va_arg(ap, char *));
break;
}
/* Free variable arguments: */
va_end(ap);
/* Unlock the file descriptor: */
_FD_UNLOCK(fd, FD_RDWR);
}
/* Return the completion status: */
return (ret);
}