libsyscall/wrappers/legacy/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 #ifndef NO_SYSCALL_LEGACY
  25
  26 #define _NONSTD_SOURCE
  27 #include <sys/cdefs.h>
  28
  29 #include <sys/types.h>
  30 #include <sys/fcntl.h>
  31 #include <stdarg.h>
  32
  33 int __open_nocancel(const char *path, int flags, mode_t mode);
  34
  35 /*
  36  * open stub: The legacy interface never automatically associated a controlling
  37  * tty, so we always pass O_NOCTTY.
  38  */
  39 int
  40 open(const char *path, int flags, ...)
  41 {
  42         mode_t mode = 0;
  43
  44         if(flags & O_CREAT) {
  45                 va_list ap;
  46                 va_start(ap, flags);
  47                 // compiler warns to pass int (not mode_t) to va_arg
  48                 mode = va_arg(ap, int);
  49                 va_end(ap);
  50         }
  51         return(__open_nocancel(path, flags | O_NOCTTY, mode));
  52 }
  53
  54 #endif /* NO_SYSCALL_LEGACY */