io/open.c

   1 /* Open a file by name.  Stub version.
   2    Copyright (C) 1991-2023 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    <https://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 (const char *file, int oflag)
  30 {
  31   int mode;
  32
  33   if (file == NULL)
  34     {
  35       __set_errno (EINVAL);
  36       return -1;
  37     }
  38
  39   if (__OPEN_NEEDS_MODE (oflag))
  40     {
  41       va_list arg;
  42       va_start(arg, oflag);
  43       mode = va_arg(arg, int);
  44       va_end(arg);
  45     }
  46
  47   __set_errno (ENOSYS);
  48   return -1;
  49 }
  50 libc_hidden_def (__libc_open)
  51 weak_alias (__libc_open, __open)
  52 libc_hidden_weak (__open)
  53 weak_alias (__libc_open, open)
  54
  55 stub_warning (open)
  56
  57 /* __open_2 is a generic wrapper that calls __open.
  58    So give a stub warning for that symbol too.  */
  59 stub_warning (__open_2)