io/open.c

   1 /* Open a file by name.  Stub version.
   2    Copyright (C) 1991-2015 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
  26 /* Open FILE with access OFLAG.  If O_CREAT or O_TMPFILE is in OFLAG,
  27    a third argument is the file protection.  */
  28 int
  29 __libc_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 (__OPEN_NEEDS_MODE (oflag))
  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 (__libc_open)
  53 weak_alias (__libc_open, __open)
  54 libc_hidden_weak (__open)
  55 weak_alias (__libc_open, open)
  56
  57 stub_warning (open)
  58
  59 /* __open_2 is a generic wrapper that calls __open.
  60    So give a stub warning for that symbol too.  */
  61 stub_warning (__open_2)