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)