1 /*
2  * Copyright (c) 2014 Fujitsu Ltd.
3  * Author: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of version 2 of the GNU General Public License as
7  * published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it would be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12  *
13  * You should have received a copy of the GNU General Public License along
14  * with this program; if not, write the Free Software Foundation, Inc.,
15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16  */
17 /*
18  * DESCRIPTION
19  *	The calling process is not privileged and euid is not appropriate,
20  *	EPERM should return.
21  */
22 
23 #include <errno.h>
24 #include <pwd.h>
25 #include "test.h"
26 #include "safe_macros.h"
27 
28 char *TCID = "setegid02";
29 int TST_TOTAL = 1;
30 static void setup(void);
31 static void setegid_verify(void);
32 static void cleanup(void);
33 
34 static struct passwd *ltpuser;
35 
36 int main(int argc, char *argv[])
37 {
38 	int lc;
39 
40 	tst_parse_opts(argc, argv, NULL, NULL);
41 
42 	setup();
43 
44 	for (lc = 0; TEST_LOOPING(lc); lc++) {
45 		tst_count = 0;
46 		setegid_verify();
47 	}
48 
49 	cleanup();
50 	tst_exit();
51 }
52 
53 static void setup(void)
54 {
55 	tst_require_root();
56 
57 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
58 
59 	TEST_PAUSE;
60 
61 	ltpuser = SAFE_GETPWNAM(cleanup, "nobody");
62 
63 	SAFE_SETEUID(cleanup, ltpuser->pw_uid);
64 }
65 
66 static void setegid_verify(void)
67 {
68 	TEST(setegid(ltpuser->pw_gid));
69 
70 	if (TEST_RETURN != -1) {
71 		tst_resm(TFAIL, "setegid(%d) succeeded unexpectedly",
72 			 ltpuser->pw_gid);
73 		return;
74 	}
75 
76 	if (TEST_ERRNO == EPERM) {
77 		tst_resm(TPASS | TTERRNO, "setegid failed as expected");
78 	} else {
79 		tst_resm(TFAIL | TTERRNO,
80 			 "setegid failed unexpectedly; expected: %d - %s",
81 			 EPERM, strerror(EPERM));
82 	}
83 }
84 
85 static void cleanup(void)
86 {
87 }
88