chown.c 970 B

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * chown() for uClibc
  4. *
  5. * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
  6. *
  7. * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  8. */
  9. #include <sys/syscall.h>
  10. #include <unistd.h>
  11. #include <bits/wordsize.h>
  12. libc_hidden_proto(chown)
  13. #if (__WORDSIZE == 32 && defined(__NR_chown32)) || __WORDSIZE == 64
  14. # ifdef __NR_chown32
  15. # undef __NR_chown
  16. # define __NR_chown __NR_chown32
  17. # endif
  18. _syscall3(int, chown, const char *, path, uid_t, owner, gid_t, group);
  19. #else
  20. # define __NR___syscall_chown __NR_chown
  21. static inline _syscall3(int, __syscall_chown, const char *, path,
  22. __kernel_uid_t, owner, __kernel_gid_t, group);
  23. int chown(const char *path, uid_t owner, gid_t group)
  24. {
  25. if (((owner + 1) > (uid_t) ((__kernel_uid_t) - 1U))
  26. || ((group + 1) > (gid_t) ((__kernel_gid_t) - 1U))) {
  27. __set_errno(EINVAL);
  28. return -1;
  29. }
  30. return (__syscall_chown(path, owner, group));
  31. }
  32. #endif
  33. libc_hidden_def(chown)