setuid.c 516 B

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * setuid() for uClibc
  4. *
  5. * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org>
  6. *
  7. * GNU Library General Public License (LGPL) version 2 or later.
  8. */
  9. #include "syscalls.h"
  10. #include <unistd.h>
  11. #define __NR___syscall_setuid __NR_setuid
  12. static inline _syscall1(int, __syscall_setuid, __kernel_uid_t, uid);
  13. int setuid(uid_t uid)
  14. {
  15. if (uid == (uid_t) ~ 0 || uid != (uid_t) ((__kernel_uid_t) uid)) {
  16. __set_errno(EINVAL);
  17. return -1;
  18. }
  19. return (__syscall_setuid(uid));
  20. }