2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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. Neither the name of the author nor the names of any co-contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include "pthread_private.h"
37 __weak_reference(__fcntl, fcntl);
39 extern int __fcntl_compat(int fd, int cmd, ...);
42 _fcntl(int fd, int cmd,...)
50 /* Lock the file descriptor: */
51 if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
52 /* Initialise the variable argument list: */
55 /* Process according to file control command type: */
57 /* Duplicate a file descriptor: */
60 * Get the file descriptor that the caller wants to
63 oldfd = va_arg(ap, int);
65 /* Initialise the file descriptor table entry: */
66 if ((ret = __sys_fcntl(fd, cmd, oldfd)) < 0) {
68 /* Initialise the file descriptor table entry: */
69 else if (_thread_fd_table_init(ret) != 0) {
70 /* Quietly close the file: */
73 /* Reset the file descriptor: */
77 * Save the file open flags so that they can
80 _thread_fd_setflags(ret,
81 _thread_fd_getflags(fd));
85 flags = va_arg(ap, int);
86 ret = __sys_fcntl(fd, cmd, flags);
89 ret = __sys_fcntl(fd, cmd, 0);
92 ret = _thread_fd_getflags(fd);
96 * Get the file descriptor flags passed by the
99 flags = va_arg(ap, int);
102 * Check if the user wants a non-blocking file
105 nonblock = flags & O_NONBLOCK;
107 /* Set the file descriptor flags: */
108 if ((ret = __sys_fcntl(fd, cmd, flags | O_NONBLOCK)) != 0) {
110 /* Get the flags so that we behave like the kernel: */
111 } else if ((flags = __sys_fcntl(fd,
112 F_GETFL, 0)) == -1) {
113 /* Error getting flags: */
117 * Check if the file descriptor is non-blocking
118 * with respect to the user:
121 /* A non-blocking descriptor: */
122 _thread_fd_setflags(fd, flags | O_NONBLOCK);
124 /* Save the flags: */
125 _thread_fd_setflags(fd, flags & ~O_NONBLOCK);
128 /* Might want to make va_arg use a union */
129 ret = __fcntl_compat(fd, cmd, va_arg(ap, void *));
133 /* Free variable arguments: */
136 /* Unlock the file descriptor: */
137 _FD_UNLOCK(fd, FD_RDWR);
139 /* Return the completion status: */
144 __fcntl(int fd, int cmd,...)
149 _thread_enter_cancellation_point();
156 ret = _fcntl(fd, cmd, va_arg(ap, int));
160 ret = _fcntl(fd, cmd);
163 ret = _fcntl(fd, cmd, va_arg(ap, void *));
167 _thread_leave_cancellation_point();