sys/open.c

   1 /*
   2  * Copyright (c) 2005, 2009 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <sys/types.h>
  25 #include <fcntl.h>
  26 #include <stdarg.h>
  27
  28 int __open_nocancel(const char *path, int flags, mode_t mode);
  29
  30 /*
  31  * open stub: The legacy interface never automatically associated a controlling
  32  * tty, so we always pass O_NOCTTY.
  33  */
  34 int
  35 open(const char *path, int flags, ...)
  36 {
  37         mode_t mode = 0;
  38
  39         if(flags & O_CREAT) {
  40                 va_list ap;
  41                 va_start(ap, flags);
  42                 // compiler warns to pass int (not mode_t) to va_arg
  43                 mode = va_arg(ap, int);
  44                 va_end(ap);
  45         }
  46         return(__open_nocancel(path, flags | O_NOCTTY, mode));
  47 }