io/open.c

   1 /* Copyright (C) 1991,1995,1996,1997,2002,2007 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 <stddef.h>
  22 #include <stdio.h>
  23
  24 extern char **__libc_argv attribute_hidden;
  25
  26 /* Open FILE with access OFLAG.  If OFLAG includes O_CREAT,
  27    a third argument is the file protection.  */
  28 int
  29 __open (file, oflag)
  30      const char *file;
  31      int oflag;
  32 {
  33   int mode;
  34
  35   if (file == NULL)
  36     {
  37       __set_errno (EINVAL);
  38       return -1;
  39     }
  40
  41   if (oflag & O_CREAT)
  42     {
  43       va_list arg;
  44       va_start(arg, oflag);
  45       mode = va_arg(arg, int);
  46       va_end(arg);
  47     }
  48
  49   __set_errno (ENOSYS);
  50   return -1;
  51 }
  52 libc_hidden_def (__open)
  53 stub_warning (open)
  54
  55 weak_alias (__open, open)
  56
  57
  58 int
  59 __open_2 (file, oflag)
  60      const char *file;
  61      int oflag;
  62 {
  63   if (oflag & O_CREAT)
  64     __fortify_fail ("invalid open call: O_CREAT without mode");
  65
  66   return __open (file, oflag);
  67 }
  68 stub_warning (__open_2)
  69
  70 #include <stub-tag.h>