1 /*
2  * setreuid() for uClibc
3  *
4  * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
5  *
6  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
7  */
8 
9 #include <sys/syscall.h>
10 #include <unistd.h>
11 #include <bits/wordsize.h>
12 
13 
14 #if (__WORDSIZE == 32 && defined(__NR_setreuid32)) || __WORDSIZE == 64
15 # ifdef __NR_setreuid32
16 #  undef __NR_setreuid
17 #  define __NR_setreuid __NR_setreuid32
18 # endif
19 
20 _syscall2(int, setreuid, uid_t, ruid, uid_t, euid)
21 
22 #else
23 
24 # define __NR___syscall_setreuid __NR_setreuid
25 static __inline__ _syscall2(int, __syscall_setreuid,
26 		__kernel_uid_t, ruid, __kernel_uid_t, euid)
27 
28 int setreuid(uid_t ruid, uid_t euid)
29 {
30 	if (((ruid + 1) > (uid_t) ((__kernel_uid_t) - 1U))
31 		|| ((euid + 1) > (uid_t) ((__kernel_uid_t) - 1U))) {
32 		__set_errno(EINVAL);
33 		return -1;
34 	}
35 	return (__syscall_setreuid(ruid, euid));
36 }
37 #endif
38 
39 libc_hidden_weak(setreuid)
40