1 /*
2 *
3 * Copyright (c) International Business Machines Corp., 2001
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * NAME
22 * setpriority05.c
23 *
24 * DESCRIPTION
25 * setpriority05 - test for an expected failure by trying to change
26 * a process with an ID that is different from the
27 * test process
28 *
29 * ALGORITHM
30 * loop if that option was specified
31 * issue the system call with init's process id (1)
32 * check the errno value
33 * issue a PASS message if we get EPERM - errno 1
34 * otherwise, the tests fails
35 * issue a FAIL message
36 * break any remaining tests
37 * call cleanup
38 *
39 * USAGE: <for command-line>
40 * setpriority05 [-c n] [-e] [-i n] [-I x] [-p x] [-t]
41 * where, -c n : Run n copies concurrently.
42 * -e : Turn on errno logging.
43 * -i n : Execute test n times.
44 * -I x : Execute test for x seconds.
45 * -P x : Pause for x seconds between iterations.
46 * -t : Turn on syscall timing.
47 *
48 * HISTORY
49 * 03/2001 - Written by Wayne Boyer
50 *
51 * RESTRICTIONS
52 * none
53 */
54
55 #include "test.h"
56
57 #include <errno.h>
58 #include <sys/time.h>
59 #include <sys/resource.h>
60 #include <pwd.h>
61
62 void cleanup(void);
63 void setup(void);
64
65 char *TCID = "setpriority05";
66 int TST_TOTAL = 1;
67 char nobody_uid[] = "nobody";
68 struct passwd *ltpuser;
69
main(int ac,char ** av)70 int main(int ac, char **av)
71 {
72 int lc;
73 int new_val = 2;
74 int init_val = 1; /* the init process = id 1 */
75
76 tst_parse_opts(ac, av, NULL, NULL);
77
78 setup(); /* global setup */
79
80 /* The following loop checks looping state if -i option given */
81
82 for (lc = 0; TEST_LOOPING(lc); lc++) {
83 /* reset tst_count in case we are looping */
84 tst_count = 0;
85
86 /*
87 * Try to access the init process.
88 * This should give an EPERM error.
89 */
90
91 /* call the system call with the TEST() macro */
92 TEST(setpriority(PRIO_PROCESS, init_val, new_val));
93
94 if (TEST_RETURN == 0) {
95 tst_resm(TFAIL, "call failed to produce expected error "
96 "- errno = %d - %s", TEST_ERRNO,
97 strerror(TEST_ERRNO));
98 }
99
100 switch (TEST_ERRNO) {
101 case EPERM:
102 tst_resm(TPASS, "expected failure - errno = %d - %s",
103 TEST_ERRNO, strerror(TEST_ERRNO));
104 break;
105 default:
106 tst_resm(TFAIL, "call failed to produce expected error "
107 "- errno = %d - %s", TEST_ERRNO,
108 strerror(TEST_ERRNO));
109 }
110 }
111 cleanup();
112 tst_exit();
113
114 }
115
116 /*
117 * setup() - performs all the ONE TIME setup for this test.
118 */
setup(void)119 void setup(void)
120 {
121 tst_require_root();
122
123 /* Switch to nobody user for correct error code collection */
124 ltpuser = getpwnam(nobody_uid);
125 if (setuid(ltpuser->pw_uid) == -1) {
126 tst_resm(TINFO, "setuid failed to "
127 "to set the effective uid to %d", ltpuser->pw_uid);
128 perror("setuid");
129 }
130
131 tst_sig(NOFORK, DEF_HANDLER, cleanup);
132
133 TEST_PAUSE;
134 }
135
136 /*
137 * cleanup() - performs all the ONE TIME cleanup for this test at completion
138 * or premature exit.
139 */
cleanup(void)140 void cleanup(void)
141 {
142
143 }
144