sysdeps/unix/sysv/linux/open64.c

   1 /* Copyright (C) 1991-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <stdarg.h>
  21 #include <stdio.h>
  22 #include <sysdep-cancel.h>
  23
  24 /* Open FILE with access OFLAG.  If OFLAG includes O_CREAT,
  25    a third argument is the file protection.  */
  26 int
  27 __libc_open64 (const char *file, int oflag, ...)
  28 {
  29   int mode = 0;
  30
  31   if (oflag & O_CREAT)
  32     {
  33       va_list arg;
  34       va_start (arg, oflag);
  35       mode = va_arg (arg, int);
  36       va_end (arg);
  37     }
  38
  39   if (SINGLE_THREAD_P)
  40     return INLINE_SYSCALL (open, 3, file, oflag | O_LARGEFILE, mode);
  41
  42   int oldtype = LIBC_CANCEL_ASYNC ();
  43
  44   int result = INLINE_SYSCALL (open, 3, file, oflag | O_LARGEFILE, mode);
  45
  46   LIBC_CANCEL_RESET (oldtype);
  47
  48   return result;
  49 }
  50 weak_alias (__libc_open64, __open64)
  51 libc_hidden_weak (__open64)
  52 weak_alias (__libc_open64, open64)