fchown.c 903 B

1234567891011121314151617181920212223242526272829303132333435363738
  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * fchown() for uClibc
  4. *
  5. * Copyright (C) 2000-2006 Erik Andersen <andersen@codepoet.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 (__WORDSIZE == 32 && defined(__NR_fchown32)) || __WORDSIZE == 64
  13. # ifdef __NR_fchown32
  14. # undef __NR_fchown
  15. # define __NR_fchown __NR_fchown32
  16. # endif
  17. _syscall3(int, fchown, int, fd, uid_t, owner, gid_t, group)
  18. #else
  19. # define __NR___syscall_fchown __NR_fchown
  20. static __inline__ _syscall3(int, __syscall_fchown, int, fd,
  21. __kernel_uid_t, owner, __kernel_gid_t, group)
  22. int fchown(int fd, uid_t owner, gid_t group)
  23. {
  24. if (((owner + 1) > (uid_t) ((__kernel_uid_t) - 1U))
  25. || ((group + 1) > (gid_t) ((__kernel_gid_t) - 1U))) {
  26. __set_errno(EINVAL);
  27. return -1;
  28. }
  29. return (__syscall_fchown(fd, owner, group));
  30. }
  31. #endif