thr_fcntl.c revision 165967
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. 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. 16 * 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 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/lib/libkse/thread/thr_fcntl.c 165967 2007-01-12 07:26:21Z imp $ 30 */ 31#include <stdarg.h> 32#include "namespace.h" 33#include <fcntl.h> 34#include "un-namespace.h" 35#include <pthread.h> 36#include "thr_private.h" 37 38LT10_COMPAT_PRIVATE(__fcntl); 39LT10_COMPAT_DEFAULT(fcntl); 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