lchown.c 1.1 KB

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * lchown() 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. #if defined __NR_fchownat && !defined __NR_lchown
  13. # include <fcntl.h>
  14. int lchown(const char *path, uid_t owner, gid_t group)
  15. {
  16. return fchownat(AT_FDCWD, path, owner, group, AT_SYMLINK_NOFOLLOW);
  17. }
  18. #else
  19. # if (__WORDSIZE == 32 && defined(__NR_lchown32)) || __WORDSIZE == 64
  20. # ifdef __NR_lchown32
  21. # undef __NR_lchown
  22. # define __NR_lchown __NR_lchown32
  23. # endif
  24. _syscall3(int, lchown, const char *, path, uid_t, owner, gid_t, group)
  25. # else
  26. # define __NR___syscall_lchown __NR_lchown
  27. static __inline__ _syscall3(int, __syscall_lchown, const char *, path,
  28. __kernel_uid_t, owner, __kernel_gid_t, group)
  29. int lchown(const char *path, uid_t owner, gid_t group)
  30. {
  31. if (((owner + 1) > (uid_t) ((__kernel_uid_t) - 1U))
  32. || ((group + 1) > (gid_t) ((__kernel_gid_t) - 1U))) {
  33. __set_errno(EINVAL);
  34. return -1;
  35. }
  36. return __syscall_lchown(path, owner, group);
  37. }
  38. # endif
  39. #endif