lib/libc_r/uthread/uthread_ioctl.c

   1 /*
   2  * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by John Birrell.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/lib/libc_r/uthread/uthread_ioctl.c,v 1.9.2.3 2002/10/22 14:44:03 fjoe Exp $
  33  * $DragonFly: src/lib/libc_r/uthread/uthread_ioctl.c,v 1.2 2003/06/17 04:26:48 dillon Exp $
  34  */
  35 #include <stdarg.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/fcntl.h>  /* O_NONBLOCK*/
  38 #include <pthread.h>
  39 #include "pthread_private.h"
  40
  41 int
  42 _ioctl(int fd, unsigned long request,...)
  43 {
  44         int             ret;
  45         int             flags;
  46         int             *op;
  47         va_list         ap;
  48
  49         /* Lock the file descriptor: */
  50         if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
  51                 /* Initialise the variable argument list: */
  52                 va_start(ap, request);
  53
  54                 switch( request) {
  55                 case FIONBIO:
  56                         /*
  57                          * descriptors must be non-blocking; we are only
  58                          * twiddling the flag based on the request
  59                          */
  60                         op = va_arg(ap, int *);
  61                         flags = _thread_fd_getflags(fd) & ~O_NONBLOCK;
  62                         flags |= ((*op) ? O_NONBLOCK : 0);
  63                         _thread_fd_setflags(fd, flags);
  64                         ret = 0;
  65                         break;
  66                 default:
  67                         ret = __sys_ioctl(fd, request, va_arg(ap, char *));
  68                         break;
  69                 }
  70
  71                 /* Free variable arguments: */
  72                 va_end(ap);
  73
  74                 /* Unlock the file descriptor: */
  75                 _FD_UNLOCK(fd, FD_RDWR);
  76         }
  77
  78         /* Return the completion status: */
  79         return (ret);
  80 }
  81
  82 __strong_reference(_ioctl, ioctl);