sysdeps/unix/sysv/linux/open64.c

   1 /* Linux open syscall implementation, LFS.
   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 <sys/types.h>
  20 #include <sys/stat.h>
  21 #include <fcntl.h>
  22 #include <stdarg.h>
  23 #include <sysdep-cancel.h>
  24 #include <shlib-compat.h>
  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_open64 (const char *file, int oflag, ...)
  30 {
  31   int mode = 0;
  32
  33   if (__OPEN_NEEDS_MODE (oflag))
  34     {
  35       va_list arg;
  36       va_start (arg, oflag);
  37       mode = va_arg (arg, int);
  38       va_end (arg);
  39     }
  40
  41   return SYSCALL_CANCEL (openat, AT_FDCWD, file, oflag | O_LARGEFILE,
  42                          mode);
  43 }
  44
  45 strong_alias (__libc_open64, __open64)
  46 libc_hidden_weak (__open64)
  47 weak_alias (__libc_open64, open64)
  48
  49 #ifdef __OFF_T_MATCHES_OFF64_T
  50 strong_alias (__libc_open64, __libc_open)
  51 strong_alias (__libc_open64, __open)
  52 libc_hidden_weak (__open)
  53 weak_alias (__libc_open64, open)
  54 #endif
  55
  56 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_1, GLIBC_2_2)
  57 compat_symbol (libc, __libc_open64, open64, GLIBC_2_2);
  58 #endif