io/open.c

   1 /* Open a file by name.  Stub version.
   2    Copyright (C) 1991-2013 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <stdarg.h>
  22 #include <stddef.h>
  23 #include <stdio.h>
  24
  25 extern char **__libc_argv attribute_hidden;
  26
  27 /* Open FILE with access OFLAG.  If OFLAG includes O_CREAT,
  28    a third argument is the file protection.  */
  29 int
  30 __libc_open (file, oflag)
  31      const char *file;
  32      int oflag;
  33 {
  34   int mode;
  35
  36   if (file == NULL)
  37     {
  38       __set_errno (EINVAL);
  39       return -1;
  40     }
  41
  42   if (oflag & O_CREAT)
  43     {
  44       va_list arg;
  45       va_start(arg, oflag);
  46       mode = va_arg(arg, int);
  47       va_end(arg);
  48     }
  49
  50   __set_errno (ENOSYS);
  51   return -1;
  52 }
  53 libc_hidden_def (__libc_open)
  54 weak_alias (__libc_open, __open)
  55 libc_hidden_weak (__open)
  56 weak_alias (__libc_open, open)
  57
  58 stub_warning (open)
  59
  60
  61 int
  62 __open_2 (file, oflag)
  63      const char *file;
  64      int oflag;
  65 {
  66   if (oflag & O_CREAT)
  67     __fortify_fail ("invalid open call: O_CREAT without mode");
  68
  69   return __open (file, oflag);
  70 }
  71 stub_warning (__open_2)