1  /* Linux openat syscall implementation, LFS.
       2     Copyright (C) 2007-2023 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 <fcntl.h>
      20  #include <stdarg.h>
      21  
      22  #include <sysdep-cancel.h>
      23  
      24  /* Open FILE with access OFLAG.  Interpret relative paths relative to
      25     the directory associated with FD.  If OFLAG includes O_CREAT or
      26     O_TMPFILE, a fourth argument is the file protection.  */
      27  int
      28  __libc_openat64 (int fd, const char *file, int oflag, ...)
      29  {
      30    mode_t mode = 0;
      31    if (__OPEN_NEEDS_MODE (oflag))
      32      {
      33        va_list arg;
      34        va_start (arg, oflag);
      35        mode = va_arg (arg, mode_t);
      36        va_end (arg);
      37      }
      38  
      39    return SYSCALL_CANCEL (openat, fd, file, oflag | O_LARGEFILE, mode);
      40  }
      41  
      42  strong_alias (__libc_openat64, __openat64)
      43  libc_hidden_weak (__openat64)
      44  weak_alias (__libc_openat64, openat64)
      45  
      46  #ifdef __OFF_T_MATCHES_OFF64_T
      47  strong_alias (__libc_openat64, __openat)
      48  libc_hidden_weak (__openat)
      49  weak_alias (__libc_openat64, openat)
      50  #endif