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 * setrlimit03.c
23 *
24 * DESCRIPTION
25 * Test for EPERM when the super-user tries to increase RLIMIT_NOFILE
26 * beyond the system limit.
27 *
28 * USAGE: <for command-line>
29 * setrlimit03 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
30 * where, -c n : Run n copies concurrently.
31 * -e : Turn on errno logging.
32 * -i n : Execute test n times.
33 * -I x : Execute test for x seconds.
34 * -P x : Pause for x seconds between iterations.
35 * -t : Turn on syscall timing.
36 *
37 * HISTORY
38 * 07/2001 Ported by Wayne Boyer
39 *
40 * RESTRICTIONS
41 * Must run test as root.
42 */
43 #include <sys/time.h>
44 #include <sys/resource.h>
45 #include <unistd.h>
46 #include <errno.h>
47 #include "test.h"
48 #include <linux/fs.h>
49
50 char *TCID = "setrlimit03";
51 int TST_TOTAL = 1;
52
53 #if !defined(NR_OPEN)
54 //Taken from definition in /usr/include/linux/fs.h
55 #define NR_OPEN (1024*1024)
56 #endif
57
58 void setup();
59 void cleanup();
60
main(int ac,char ** av)61 int main(int ac, char **av)
62 {
63 int lc;
64 struct rlimit rlim;
65
66 tst_parse_opts(ac, av, NULL, NULL);
67
68 setup();
69
70 for (lc = 0; TEST_LOOPING(lc); lc++) {
71
72 tst_count = 0;
73
74 if (getrlimit(RLIMIT_NOFILE, &rlim) != 0)
75 tst_brkm(TFAIL, cleanup, "getrlimit failed, "
76 "errno = %d", errno);
77 rlim.rlim_max = NR_OPEN + 1;
78
79 TEST(setrlimit(RLIMIT_NOFILE, &rlim));
80
81 if (TEST_RETURN != -1) {
82 tst_resm(TFAIL, "call succeeded unexpectedly");
83 continue;
84 }
85
86 if (TEST_ERRNO != EPERM) {
87 tst_resm(TFAIL, "Expected EPERM, got %d", TEST_ERRNO);
88 } else {
89 tst_resm(TPASS, "got expected EPERM error");
90 }
91 }
92 cleanup();
93 tst_exit();
94
95 }
96
97 /*
98 * setup() - performs all ONE TIME setup for this test.
99 */
setup(void)100 void setup(void)
101 {
102 tst_require_root();
103
104 tst_sig(FORK, DEF_HANDLER, cleanup);
105
106 TEST_PAUSE;
107 }
108
109 /*
110 * cleanup() - performs all ONE TIME cleanup for this test at
111 * completion or premature exit.
112 */
cleanup(void)113 void cleanup(void)
114 {
115
116 }
117