sys/fcntl.c

   1 /*
   2  * Copyright (c) 2004, 2006 Apple Computer, 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 #include <fcntl.h>
  24 #include <stdarg.h>
  25
  26 #ifdef VARIANT_CANCELABLE
  27 int __fcntl(int, int, void *);
  28 #else /* !VARIANT_CANCELABLE */
  29 int __fcntl_nocancel(int, int, void *);
  30 #endif /* VARIANT_CANCELABLE */
  31
  32 /*
  33  * Stub function to account for the differences in the size of the third
  34  * argument when int and void * are different sizes. Also add pthread
  35  * cancelability.
  36  *
  37  * This is for LP64 only.
  38  */
  39 int
  40 fcntl(int fd, int cmd, ...)
  41 {
  42         va_list ap;
  43         void *arg;
  44
  45         va_start(ap, cmd);
  46         switch(cmd) {
  47          case F_GETLK:
  48          case F_SETLK:
  49          case F_SETLKW:
  50          case F_PREALLOCATE:
  51          case F_SETSIZE:
  52          case F_RDADVISE:
  53          case F_READBOOTSTRAP:
  54          case F_WRITEBOOTSTRAP:
  55          case F_LOG2PHYS:
  56          case F_GETPATH:
  57          case F_PATHPKG_CHECK:
  58          case F_OPENFROM:
  59          case F_UNLINKFROM:
  60          case F_ADDSIGS:
  61                 arg = va_arg(ap, void *);
  62                 break;
  63          default:
  64                 arg = (void *)((unsigned long)va_arg(ap, int));
  65                 break;
  66         }
  67         va_end(ap);
  68 #ifdef VARIANT_CANCELABLE
  69         return (__fcntl(fd, cmd, arg));
  70 #else /* !VARIANT_CANCELABLE */
  71         return (__fcntl_nocancel(fd, cmd, arg));
  72 #endif /* VARIANT_CANCELABLE */
  73 }