1 /* Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify it
4 * under the terms of version 2 of the GNU General Public License as
5 * published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it would be useful, but
8 * WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
10 *
11 * You should have received a copy of the GNU General Public License along
12 * with this program; if not, write the Free Software Foundation, Inc.,
13 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
14 *
15 */
16 /*
17 * This test case checks whether swapon(2) system call returns
18 * 1. ENOENT when the path does not exist
19 * 2. EINVAL when the path exists but is invalid
20 * 3. EPERM when user is not a superuser
21 * 4. EBUSY when the specified path is already being used as a swap area
22 */
23
24 #include <unistd.h>
25 #include <errno.h>
26 #include <stdlib.h>
27 #include <sys/types.h>
28 #include <sys/wait.h>
29 #include <sys/stat.h>
30 #include <fcntl.h>
31 #include <pwd.h>
32 #include <string.h>
33 #include <sys/utsname.h>
34 #include <signal.h>
35 #include "test.h"
36 #include "lapi/syscalls.h"
37 #include "safe_macros.h"
38 #include "libswapon.h"
39
40 static void setup(void);
41 static void cleanup(void);
42 static void setup01(void);
43 static void cleanup01(void);
44
45 char *TCID = "swapon02";
46 int TST_TOTAL = 4;
47
48 static uid_t nobody_uid;
49 static int do_swapoff;
50 static long fs_type;
51
52 static struct test_case_t {
53 char *err_desc;
54 int exp_errno;
55 char *exp_errval;
56 char *path;
57 void (*setup)(void);
58 void (*cleanup)(void);
59 } testcases[] = {
60 {"Path does not exist", ENOENT, "ENOENT", "./doesnotexist", NULL, NULL},
61 {"Invalid path", EINVAL, "EINVAL", "./notswap", NULL, NULL},
62 {"Permission denied", EPERM, "EPERM", "./swapfile01",
63 setup01, cleanup01},
64 {"File already used", EBUSY, "EBUSY", "./alreadyused", NULL, NULL},
65 };
66
verify_swapon(struct test_case_t * test)67 static void verify_swapon(struct test_case_t *test)
68 {
69 if (test->setup)
70 test->setup();
71
72 TEST(ltp_syscall(__NR_swapon, test->path, 0));
73
74 if (test->cleanup)
75 test->cleanup();
76
77 if (TEST_RETURN == -1 && TEST_ERRNO == test->exp_errno) {
78 tst_resm(TPASS, "swapon(2) expected failure;"
79 " Got errno - %s : %s",
80 test->exp_errval, test->err_desc);
81 return;
82 }
83
84 if (fs_type == TST_BTRFS_MAGIC && errno == EINVAL) {
85 tst_resm(TCONF, "Swapfile on BTRFS not implemeted");
86 return;
87 }
88
89 tst_resm(TFAIL, "swapon(2) failed to produce expected error:"
90 " %d, errno: %s and got %d.", test->exp_errno,
91 test->exp_errval, TEST_ERRNO);
92 }
93
main(int ac,char ** av)94 int main(int ac, char **av)
95 {
96 int lc, i;
97
98 tst_parse_opts(ac, av, NULL, NULL);
99
100 setup();
101
102 for (lc = 0; TEST_LOOPING(lc); lc++) {
103 tst_count = 0;
104 for (i = 0; i < TST_TOTAL; i++)
105 verify_swapon(testcases + i);
106 }
107
108 cleanup();
109 tst_exit();
110 }
111
setup01(void)112 static void setup01(void)
113 {
114 SAFE_SETEUID(cleanup, nobody_uid);
115 }
116
cleanup01(void)117 static void cleanup01(void)
118 {
119 SAFE_SETEUID(cleanup, 0);
120 }
121
setup(void)122 static void setup(void)
123 {
124 struct passwd *nobody;
125
126 tst_sig(FORK, DEF_HANDLER, cleanup);
127
128 tst_require_root();
129
130 nobody = SAFE_GETPWNAM(cleanup, "nobody");
131 nobody_uid = nobody->pw_uid;
132
133 tst_tmpdir();
134
135 switch ((fs_type = tst_fs_type(cleanup, "."))) {
136 case TST_NFS_MAGIC:
137 case TST_TMPFS_MAGIC:
138 tst_brkm(TCONF, cleanup,
139 "Cannot do swapon on a file on %s filesystem",
140 tst_fs_type_name(fs_type));
141 break;
142 }
143
144 SAFE_TOUCH(cleanup, "notswap", 0777, NULL);
145 make_swapfile(cleanup, "swapfile01");
146 make_swapfile(cleanup, "alreadyused");
147
148 if (ltp_syscall(__NR_swapon, "alreadyused", 0)) {
149 if (fs_type != TST_BTRFS_MAGIC || errno != EINVAL)
150 tst_resm(TWARN | TERRNO, "swapon(alreadyused) failed");
151 } else {
152 do_swapoff = 1;
153 }
154
155 TEST_PAUSE;
156 }
157
cleanup(void)158 void cleanup(void)
159 {
160 if (do_swapoff && ltp_syscall(__NR_swapoff, "alreadyused"))
161 tst_resm(TWARN | TERRNO, "swapoff(alreadyused) failed");
162
163 tst_rmdir();
164 }
165