openat.c 1.5 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546
  1. /* Linux openat syscall implementation, non-LFS.
  2. Copyright (C) 2005-2019 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. #include <fcntl.h>
  16. #include <stdarg.h>
  17. #include <sysdep-cancel.h>
  18. #ifndef __OFF_T_MATCHES_OFF64_T
  19. /* Open FILE with access OFLAG. Interpret relative paths relative to
  20. the directory associated with FD. If OFLAG includes O_CREAT or
  21. O_TMPFILE, a fourth argument is the file protection. */
  22. int
  23. __libc_openat (int fd, const char *file, int oflag, ...)
  24. {
  25. mode_t mode = 0;
  26. if (__OPEN_NEEDS_MODE (oflag))
  27. {
  28. va_list arg;
  29. va_start (arg, oflag);
  30. mode = va_arg (arg, mode_t);
  31. va_end (arg);
  32. }
  33. return SYSCALL_CANCEL (openat, fd, file, oflag, mode);
  34. }
  35. weak_alias (__libc_openat, __openat)
  36. libc_hidden_weak (__openat)
  37. weak_alias (__libc_openat, openat)
  38. #endif