sysdeps/unix/sysv/linux/open.c

   1 /* Linux open syscall implementation, non-LFS.
   2    Copyright (C) 2017-2024 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 <sys/types.h>
  20 #include <sys/stat.h>
  21 #include <fcntl.h>
  22 #include <stdarg.h>
  23
  24 #include <sysdep-cancel.h>
  25
  26 #ifndef __OFF_T_MATCHES_OFF64_T
  27
  28 /* Open FILE with access OFLAG.  If O_CREAT or O_TMPFILE is in OFLAG,
  29    a third argument is the file protection.  */
  30 int
  31 __libc_open (const char *file, int oflag, ...)
  32 {
  33   int mode = 0;
  34
  35   if (__OPEN_NEEDS_MODE (oflag))
  36     {
  37       va_list arg;
  38       va_start (arg, oflag);
  39       mode = va_arg (arg, int);
  40       va_end (arg);
  41     }
  42
  43   return SYSCALL_CANCEL (openat, AT_FDCWD, file, oflag, mode);
  44 }
  45 libc_hidden_def (__libc_open)
  46
  47 weak_alias (__libc_open, __open)
  48 libc_hidden_weak (__open)
  49 weak_alias (__libc_open, open)
  50 #endif