thr_fcntl.c revision 123312 
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: head/lib/libkse/thread/thr_fcntl.c 123312 2003-12-09 02:20:56Z davidxu $
33 */
34#include <stdarg.h>
35#include "namespace.h"
36#include <fcntl.h>
37#include "un-namespace.h"
38#include <pthread.h>
39#include "thr_private.h"
40
41__weak_reference(__fcntl, fcntl);
42
43int
44__fcntl(int fd, int cmd,...)
45{
46	struct pthread *curthread = _get_curthread();
47	int	ret, check = 1;
48	va_list	ap;
49
50	_thr_cancel_enter(curthread);
51
52	va_start(ap, cmd);
53	switch (cmd) {
54	case F_DUPFD:
55		ret = __sys_fcntl(fd, cmd, va_arg(ap, int));
56		/*
57		 * To avoid possible file handle leak,
58		 * only check cancellation point if it is failure
59		 */
60		check = (ret == -1);
61		break;
62	case F_SETFD:
63	case F_SETFL:
64		ret = __sys_fcntl(fd, cmd, va_arg(ap, int));
65		break;
66	case F_GETFD:
67	case F_GETFL:
68		ret = __sys_fcntl(fd, cmd);
69		break;
70	default:
71		ret = __sys_fcntl(fd, cmd, va_arg(ap, void *));
72	}
73	va_end(ap);
74
75	_thr_cancel_leave(curthread, check);
76
77	return (ret);
78}
79