1 /*
2  * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
3  *
4  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
5  */
6 
7 #include <unistd.h>
8 #include <stdio.h>
9 #include <errno.h>
10 #include <pwd.h>
11 #include <sys/types.h>
12 #include <sys/syscall.h>
13 
14 #if !defined __UCLIBC_LINUX_SPECIFIC__
15 #undef __NR_setresuid
16 #undef __NR_setresuid32
17 #endif
18 
seteuid(uid_t uid)19 int seteuid(uid_t uid)
20 {
21     int result;
22 
23     if (uid == (uid_t) ~0)
24     {
25 	__set_errno (EINVAL);
26 	return -1;
27     }
28 
29 #if (defined __NR_setresuid || defined __NR_setresuid32) && defined __USE_GNU
30     result = setresuid(-1, uid, -1);
31     if (result == -1 && errno == ENOSYS)
32 	/* Will also set the saved user ID if euid != uid,
33 	 * making it impossible to switch back...*/
34 #endif
35 	result = setreuid(-1, uid);
36 
37     return result;
38 }
39 libc_hidden_def(seteuid)
40