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 * sched_setscheduler01.c
23 *
24 * DESCRIPTION
25 * Testcase to test whether sched_setscheduler(2) sets the errnos
26 * correctly.
27 *
28 * ALGORITHM
29 * 1. Call sched_setscheduler as a non-root uid, and expect EPERM
30 * to be returned.
31 *
32 * USAGE: <for command-line>
33 * sched_setscheduler02 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
34 * where, -c n : Run n copies concurrently.
35 * -e : Turn on errno logging.
36 * -i n : Execute test n times.
37 * -I x : Execute test for x seconds.
38 * -P x : Pause for x seconds between iterations.
39 * -t : Turn on syscall timing.
40 *
41 * HISTORY
42 * 07/2001 Ported by Wayne Boyer
43 *
44 * RESTRICTIONS
45 * Must run test as root.
46 */
47 #include <stdio.h>
48 #include <errno.h>
49 #include <sched.h>
50 #include <pwd.h>
51 #include <sys/types.h>
52 #include <sys/wait.h>
53
54 #include "test.h"
55 #include "safe_macros.h"
56
57 #define SCHED_INVALID 99
58 #define INVALID_PID 999999
59
60 char *TCID = "sched_setscheduler02";
61 int TST_TOTAL = 1;
62
63 void setup(void);
64 void cleanup(void);
65
66 static uid_t nobody_uid;
67
main(int ac,char ** av)68 int main(int ac, char **av)
69 {
70 int lc;
71 pid_t pid;
72 struct sched_param param;
73 int status;
74
75 tst_parse_opts(ac, av, NULL, NULL);
76
77 setup();
78
79 for (lc = 0; TEST_LOOPING(lc); lc++) {
80
81 /* reset tst_count in case we are looping */
82 tst_count = 0;
83
84 if ((pid = FORK_OR_VFORK()) == -1) {
85 tst_brkm(TBROK, cleanup, "fork failed");
86 }
87
88 if (pid == 0) { /* child */
89 param.sched_priority = 1;
90
91 SAFE_SETEUID(cleanup, nobody_uid);
92
93 TEST(sched_setscheduler(pid, SCHED_FIFO, ¶m));
94
95 if (TEST_ERRNO) {
96 }
97
98 if (TEST_RETURN != -1) {
99 tst_resm(TFAIL, "sched_setscheduler(2) passed "
100 "with non root priveledges");
101 } else if (TEST_ERRNO != EPERM) {
102 tst_resm(TFAIL, "Expected EPERM, got %d",
103 TEST_ERRNO);
104 } else {
105 tst_resm(TPASS, "got EPERM");
106 }
107 } else { /* parent */
108 /* let the child carry on */
109 wait(&status);
110 if (WIFEXITED(status) != 0) { /* Exit with errors */
111 exit(WEXITSTATUS(status));
112 } else {
113 exit(0);
114 }
115 }
116
117 SAFE_SETEUID(cleanup, 0);
118 }
119 cleanup();
120 tst_exit();
121
122 }
123
124 /*
125 * setup() - performs all ONE TIME setup for this test.
126 */
setup(void)127 void setup(void)
128 {
129 struct passwd *pw;
130
131 tst_require_root();
132
133 pw = SAFE_GETPWNAM(NULL, "nobody");
134 nobody_uid = pw->pw_uid;
135
136 tst_sig(FORK, DEF_HANDLER, cleanup);
137
138 TEST_PAUSE;
139 }
140
141 /*
142 * cleanup() - performs all ONE TIME cleanup for this test at
143 * completion or premature exit.
144 */
cleanup(void)145 void cleanup(void)
146 {
147
148 }
149