1 /*
2 * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * You should have received a copy of the GNU General Public License along
13 * with this program; if not, write the Free Software Foundation, Inc.,
14 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
15 *
16 */
17 /**********************************************************
18 *
19 * TEST IDENTIFIER : syslog12
20 *
21 * EXECUTED BY : root / superuser
22 *
23 * TEST TITLE : Checking error conditions for syslog(2)
24 *
25 * TEST CASE TOTAL : 7
26 *
27 * AUTHOR : Madhu T L <madhu.tarikere@wipro.com>
28 *
29 * SIGNALS
30 * Uses SIGUSR1 to pause before test if option set.
31 * (See the parse_opts(3) man page).
32 *
33 * DESCRIPTION
34 * Verify that,
35 * 1. syslog(2) fails with EINVAL for invalid type/command
36 * 2. syslog(2) fails with EFAULT for buffer outside program's accessible
37 * address space.
38 * 3. syslog(2) fails with EINVAL for NULL buffer argument.
39 * 4. syslog(2) fails with EINVAL for length arg. set to negative value.
40 * 5. syslog(2) fails with EPERM for non-root user.
41 * 6. syslog(2) fails with EINVAL for console level less than 0.
42 * 7. syslog(2) fails with EINVAL for console level greater than 8.
43 *
44 * Setup:
45 * Setup signal handling.
46 * Test caller is superuser
47 * Check existence of user nobody
48 * Set expected errnos
49 * Pause for SIGUSR1 if option specified.
50 *
51 * Test:
52 * Loop if the proper options are given.
53 * Execute system call
54 * Check return value and errno, if matching,
55 * Issue PASS message
56 * Otherwise,
57 * Issue FAIL message
58 *
59 * Cleanup:
60 * Print errno log and/or timing stats if options given
61 *
62 * USAGE: <for command-line>
63 * syslog12 [-c n] [-e] [-f] [-h] [-i n] [-I x] [-p] [-P x] [-t]
64 * where, -c n : Run n copies concurrently.
65 * -e : Turn on errno logging.
66 * -f : Turn off functional testing
67 * -h : Show help screen
68 * -i n : Execute test n times.
69 * -I x : Execute test for x seconds.
70 * -p : Pause for SIGUSR1 before starting
71 * -P x : Pause for x seconds between iterations.
72 * -t : Turn on syscall timing.
73 *
74 ****************************************************************/
75
76 #include <errno.h>
77 #include <pwd.h>
78 #include <sys/types.h>
79 #include <unistd.h>
80 #include <signal.h>
81 #include <linux/unistd.h>
82 #include <sys/syscall.h>
83 #include "test.h"
84 #include "safe_macros.h"
85
86 #define EXP_RET_VAL -1
87
88 struct test_case_t { /* test case structure */
89 int type; /* 1st arg */
90 char *buf; /* 2nd arg */
91 int len; /* 3rd arg */
92 int exp_errno; /* Expected errno */
93 int (*setup) (void); /* Individual setup routine */
94 void (*cleanup) (void); /* Individual cleanup routine */
95 char *desc; /* Test description */
96 };
97
98 char *TCID = "syslog12";
99 static int testno;
100
101 static char buf;
102 static struct passwd *ltpuser;
103
104 static void setup(void);
105 static void cleanup(void);
106 static int setup1(void);
107 static void cleanup1(void);
108
109 #define syslog(arg1, arg2, arg3) syscall(__NR_syslog, arg1, arg2, arg3)
110
111 static struct test_case_t tdat[] = {
112 {100, &buf, 0, EINVAL, NULL, NULL, "invalid type/command"},
113 {2, NULL, 0, EINVAL, NULL, NULL, "NULL buffer argument"},
114 {3, &buf, -1, EINVAL, NULL, NULL, "negative length argument"},
115 {2, &buf, 0, EPERM, setup1, cleanup1, "non-root user"},
116 {8, &buf, -1, EINVAL, NULL, NULL, "console level less than 0"},
117 {8, &buf, 9, EINVAL, NULL, NULL, "console level greater than 8"},
118 };
119
120 int TST_TOTAL = sizeof(tdat) / sizeof(tdat[0]);
121
timeout(int sig)122 void timeout(int sig)
123 {
124 tst_resm(TWARN, "syslog() timeout after 1s"
125 " for %s", tdat[testno].desc);
126 }
127
main(int argc,char ** argv)128 int main(int argc, char **argv)
129 {
130 int lc;
131 struct sigaction sa;
132 int ret;
133
134 tst_parse_opts(argc, argv, NULL, NULL);
135
136 setup();
137
138 memset(&sa, 0, sizeof(struct sigaction));
139 sa.sa_handler = timeout;
140 sa.sa_flags = 0;
141 sigaction(SIGALRM, &sa, NULL);
142
143 for (lc = 0; TEST_LOOPING(lc); lc++) {
144 /* reset tst_count in case we are looping */
145 tst_count = 0;
146
147 for (testno = 0; testno < TST_TOTAL; ++testno) {
148
149 if (tdat[testno].setup && tdat[testno].setup()) {
150 /* Setup failed, skip this testcase */
151 continue;
152 }
153
154 alarm(1);
155
156 TEST(syslog(tdat[testno].type, tdat[testno].buf,
157 tdat[testno].len));
158
159 alarm(0);
160 /* syslog returns an int, so we need to turn the long
161 * TEST_RETURN into an int to test with */
162 ret = TEST_RETURN;
163 if ((ret == EXP_RET_VAL) &&
164 (TEST_ERRNO == tdat[testno].exp_errno)) {
165 tst_resm(TPASS, "syslog() failed as expected"
166 " for %s : errno %d",
167 tdat[testno].desc, TEST_ERRNO);
168 } else {
169 tst_resm(TFAIL, "syslog() returned "
170 "unexpected results for %s ; returned"
171 " %d (expected %d), errno %d (expected"
172 " %d)", tdat[testno].desc,
173 ret, EXP_RET_VAL, TEST_ERRNO,
174 tdat[testno].exp_errno);
175 }
176
177 if (tdat[testno].cleanup) {
178 tdat[testno].cleanup();
179 }
180 }
181 }
182 cleanup();
183
184 tst_exit();
185 }
186
setup1(void)187 int setup1(void)
188 {
189 /* Change effective user id to nodody */
190 if (seteuid(ltpuser->pw_uid) == -1) {
191 tst_resm(TBROK, "seteuid failed to set the effective"
192 " uid to %d", ltpuser->pw_uid);
193 return 1;
194 }
195 return 0;
196 }
197
cleanup1(void)198 void cleanup1(void)
199 {
200 /* Change effective user id to root */
201 SAFE_SETEUID(NULL, 0);
202 }
203
204 /*
205 * setup()
206 * performs all ONE TIME setup for this test
207 */
setup(void)208 void setup(void)
209 {
210 tst_require_root();
211
212 tst_sig(NOFORK, DEF_HANDLER, cleanup);
213
214 /* Check for nobody_uid user id */
215 if ((ltpuser = getpwnam("nobody")) == NULL) {
216 tst_brkm(TBROK, NULL, "nobody user id doesn't exist");
217 }
218
219 /* Pause if that option was specified
220 * TEST_PAUSE contains the code to fork the test with the -c option.
221 */
222 TEST_PAUSE;
223 }
224
225 /*
226 * cleanup()
227 * performs all ONE TIME cleanup for this test at
228 * completion or premature exit
229 */
cleanup(void)230 void cleanup(void)
231 {
232
233 }
234