Libc-498.1.5.tar.gz

[apple/libc.git] / sys / fcntl.c

/*
 * Copyright (c) 2004, 2006 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
#include <fcntl.h>
#include <stdarg.h>

#ifdef VARIANT_CANCELABLE
int __fcntl(int, int, void *);
#else /* !VARIANT_CANCELABLE */
int __fcntl_nocancel(int, int, void *);
#endif /* VARIANT_CANCELABLE */

/*
 * Stub function to account for the differences in the size of the third
 * argument when int and void * are different sizes. Also add pthread
 * cancelability.
 *
 * This is for LP64 only.
 */
int
fcntl(int fd, int cmd, ...)
{
	va_list	ap;
	void *arg;

	va_start(ap, cmd);
	switch(cmd) {
	 case F_GETLK:
	 case F_SETLK:
	 case F_SETLKW:
	 case F_PREALLOCATE:
	 case F_SETSIZE:
	 case F_RDADVISE:
	 case F_READBOOTSTRAP:
	 case F_WRITEBOOTSTRAP:
	 case F_LOG2PHYS:
	 case F_GETPATH:
	 case F_PATHPKG_CHECK:
		arg = va_arg(ap, void *);
		break;
	 default:
		arg = (void *)((unsigned long)va_arg(ap, int));
		break;
	}
	va_end(ap);
#ifdef VARIANT_CANCELABLE
	return (__fcntl(fd, cmd, arg));
#else /* !VARIANT_CANCELABLE */
	return (__fcntl_nocancel(fd, cmd, arg));
#endif /* VARIANT_CANCELABLE */
}