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 * Test Name: getresgid03
22 *
23 * Test Description:
24 * Verify that getresgid() will be successful to get the real, effective
25 * and saved user ids after calling process invokes setresgid() to change
26 * the effective gid to that of specified user.
27 *
28 * Expected Result:
29 * getresgid() should return with 0 value and the effective user id
30 * should match the egid of specified user, real/saved user ids should
31 * remain unchanged.
32 *
33 * Algorithm:
34 * Setup:
35 * Setup signal handling.
36 * Pause for SIGUSR1 if option specified.
37 *
38 * Test:
39 * Loop if the proper options are given.
40 * Execute system call
41 * Check return code, if system call failed (return=-1)
42 * Log the errno and Issue a FAIL message.
43 * Otherwise,
44 * Verify the Functionality of system call
45 * if successful,
46 * Issue Functionality-Pass message.
47 * Otherwise,
48 * Issue Functionality-Fail message.
49 * Cleanup:
50 * Print errno log and/or timing stats if options given
51 *
52 * Usage: <for command-line>
53 * getresgid03 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
54 * where, -c n : Run n copies concurrently.
55 * -f : Turn off functionality Testing.
56 * -i n : Execute test n times.
57 * -I x : Execute test for x seconds.
58 * -P x : Pause for x seconds between iterations.
59 * -t : Turn on syscall timing.
60 *
61 * HISTORY
62 * 07/2001 Ported by Wayne Boyer
63 *
64 * RESTRICTIONS:
65 * This test should be run by 'super-user' (root) only.
66 *
67 */
68 #define _GNU_SOURCE 1
69
70 #include <stdio.h>
71 #include <unistd.h>
72 #include <sys/types.h>
73 #include <errno.h>
74 #include <fcntl.h>
75 #include <string.h>
76 #include <signal.h>
77 #include <pwd.h>
78
79 #include "test.h"
80
81 extern int getresgid(gid_t *, gid_t *, gid_t *);
82 extern int setresgid(gid_t, gid_t, gid_t);
83
84 char *TCID = "getresgid03";
85 int TST_TOTAL = 1;
86 gid_t pr_gid, pe_gid, ps_gid; /* calling process real/effective/saved gid */
87
88 void setup(); /* Main setup function of test */
89 void cleanup(); /* cleanup function for the test */
90
main(int ac,char ** av)91 int main(int ac, char **av)
92 {
93 int lc;
94 gid_t real_gid, /* real/eff./saved user id from getresgid() */
95 eff_gid, sav_gid;
96
97 tst_parse_opts(ac, av, NULL, NULL);
98
99 setup();
100
101 for (lc = 0; TEST_LOOPING(lc); lc++) {
102
103 tst_count = 0;
104
105 /*
106 * Call getresgid() to get the real/effective/saved
107 * user id's of the calling process after
108 * setregid() in setup.
109 */
110 TEST(getresgid(&real_gid, &eff_gid, &sav_gid));
111
112 if (TEST_RETURN == -1) {
113 tst_resm(TFAIL, "getresgid() Failed, errno=%d : %s",
114 TEST_ERRNO, strerror(TEST_ERRNO));
115 continue;
116 }
117 /*
118 * Verify the real/effective/saved gid
119 * values returned by getresgid with the
120 * expected values.
121 */
122 if ((real_gid != pr_gid) || (eff_gid != pe_gid) ||
123 (sav_gid != ps_gid)) {
124 tst_resm(TFAIL, "real:%d, effective:%d, "
125 "saved-user:%d ids differ",
126 real_gid, eff_gid, sav_gid);
127 } else {
128 tst_resm(TPASS, "Functionality of getresgid() "
129 "successful");
130 }
131 }
132
133 cleanup();
134 tst_exit();
135 }
136
137 /*
138 * setup() - performs all ONE TIME setup for this test.
139 * Make sure test process gid is root.
140 * Get the real/effective/saved user id of the calling process.
141 * Get the user info. of test user "ltpuser1" from /etc/passwd file.
142 * Set the eff. user id of test process to that of "ltpuser1" user.
143 */
setup(void)144 void setup(void)
145 {
146 struct passwd *user_id; /* passwd struct for test user */
147
148 tst_require_root();
149
150 tst_sig(NOFORK, DEF_HANDLER, cleanup);
151
152 TEST_PAUSE;
153
154 /* Real user-id of the calling process */
155 pr_gid = getgid();
156
157 /* Saved user-id of the calling process. */
158 ps_gid = getegid();
159
160 /* Get effective gid of "ltpuser1" user from passwd file */
161 if ((user_id = getpwnam("nobody")) == NULL) {
162 tst_brkm(TBROK, cleanup,
163 "getpwnam(nobody) Failed, errno=%d", errno);
164 }
165
166 /* Effective user-id of the test-user "ltpuser1" */
167 pe_gid = user_id->pw_gid;
168
169 /*
170 * Set the effective user-id of the process to that of
171 * test user "ltpuser1".
172 * The real/saved user id remains same as of caller.
173 */
174 if (setresgid(-1, pe_gid, -1) < 0) {
175 tst_brkm(TBROK, cleanup,
176 "setresgid(-1, %d, -1) Fails, errno:%d : %s",
177 ps_gid, errno, strerror(errno));
178 }
179 }
180
181 /*
182 * cleanup() - performs all ONE TIME cleanup for this test at
183 * completion or premature exit.
184 */
cleanup(void)185 void cleanup(void)
186 {
187
188 /* Reset the effective/saved gid of the calling process */
189 if (setregid(-1, pr_gid) < 0) {
190 tst_brkm(TBROK, NULL, "resetting process effective gid failed");
191 }
192
193 }
194