test_seteuid.c revision ab8beedeb70c6941e0ff68014d8db64cee4ef15d 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28#include <unistd.h>
29#include <stdio.h>
30#include <sys/types.h>
31
32int  main( void )
33{
34    uid_t ruid, euid;
35
36    printf( "sizeof(uid_t) = %d  sizeof(gid_t) = %d\n", sizeof(uid_t), sizeof(gid_t) );
37
38    ruid = getuid();
39    euid = geteuid();
40    printf("Start: ruid=%d euid=%d\n", ruid, euid);
41
42    if (seteuid(9999) != 0)
43       perror("seteuid(9999)");
44
45    ruid = getuid();
46    euid = geteuid();
47    printf("After set: ruid=%d euid=%d\n", ruid, euid);
48
49    if (seteuid(0) != 0)
50       perror("seteuid(0)");
51
52    ruid = getuid();
53    euid = geteuid();
54    printf("After restore: ruid=%d euid=%d\n", ruid, euid);
55
56    return 0;
57}
58