setreuid.c 912 B

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * setreuid() 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 (__WORDSIZE == 32 && defined(__NR_setreuid32)) || __WORDSIZE == 64
  13. # ifdef __NR_setreuid32
  14. # undef __NR_setreuid
  15. # define __NR_setreuid __NR_setreuid32
  16. # endif
  17. _syscall2(int, setreuid, uid_t, ruid, uid_t, euid)
  18. #else
  19. # define __NR___syscall_setreuid __NR_setreuid
  20. static __inline__ _syscall2(int, __syscall_setreuid,
  21. __kernel_uid_t, ruid, __kernel_uid_t, euid)
  22. int setreuid(uid_t ruid, uid_t euid)
  23. {
  24. if (((ruid + 1) > (uid_t) ((__kernel_uid_t) - 1U))
  25. || ((euid + 1) > (uid_t) ((__kernel_uid_t) - 1U))) {
  26. __set_errno(EINVAL);
  27. return -1;
  28. }
  29. return (__syscall_setreuid(ruid, euid));
  30. }
  31. #endif
  32. libc_hidden_def(setreuid)