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: fchmod04
22 *
23 * Test Description:
24 * Verify that, fchmod(2) will succeed to change the mode of a directory
25 * and set the sticky bit on it if invoked by non-root (uid != 0) process
26 * with the following constraints,
27 * - the process is the owner of the directory.
28 * - the effective group ID or one of the supplementary group ID's of the
29 * process is equal to the group ID of the directory.
30 *
31 * Expected Result:
32 * fchmod() should return value 0 on success and succeeds to set sticky bit
33 * on the specified directory.
34 *
35 * Algorithm:
36 * Setup:
37 * Setup signal handling.
38 * Create temporary directory.
39 * Pause for SIGUSR1 if option specified.
40 *
41 * Test:
42 * Loop if the proper options are given.
43 * Execute system call
44 * Check return code, if system call failed (return=-1)
45 * Log the errno and Issue a FAIL message.
46 * Otherwise,
47 * Verify the Functionality of system call
48 * if successful,
49 * Issue Functionality-Pass message.
50 * Otherwise,
51 * Issue Functionality-Fail message.
52 * Cleanup:
53 * Print errno log and/or timing stats if options given
54 * Delete the temporary directory created.
55 *
56 * Usage: <for command-line>
57 * fchmod04 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
58 * where, -c n : Run n copies concurrently.
59 * -f : Turn off functionality Testing.
60 * -i n : Execute test n times.
61 * -I x : Execute test for x seconds.
62 * -P x : Pause for x seconds between iterations.
63 * -t : Turn on syscall timing.
64 *
65 * HISTORY
66 * 07/2001 Ported by Wayne Boyer
67 *
68 * RESTRICTIONS:
69 * This test should be run by 'non-super-user' only.
70 *
71 */
72
73 #include <stdio.h>
74 #include <sys/types.h>
75 #include <sys/stat.h>
76 #include <fcntl.h>
77 #include <errno.h>
78 #include <string.h>
79 #include <signal.h>
80 #include <pwd.h>
81
82 #include "test.h"
83 #include "safe_macros.h"
84 #include "fchmod.h"
85
86 int fd; /* file descriptor for test directory */
87 char *TCID = "fchmod04";
88 int TST_TOTAL = 1;
89
90 char nobody_uid[] = "nobody";
91 struct passwd *ltpuser;
92
93 void setup();
94 void cleanup();
95
main(int ac,char ** av)96 int main(int ac, char **av)
97 {
98 struct stat stat_buf; /* stat struct. */
99 int lc;
100 mode_t dir_mode; /* mode permissions set on testdirectory */
101
102 tst_parse_opts(ac, av, NULL, NULL);
103
104 setup();
105
106 for (lc = 0; TEST_LOOPING(lc); lc++) {
107
108 tst_count = 0;
109
110 /*
111 * Call fchmod(2) with mode argument to
112 * set sticky bit on TESTDIR
113 */
114 TEST(fchmod(fd, PERMS));
115
116 if (TEST_RETURN == -1) {
117 tst_resm(TFAIL | TTERRNO, "fchmod failed");
118 continue;
119 }
120 if (fstat(fd, &stat_buf) == -1)
121 tst_brkm(TFAIL | TERRNO, cleanup,
122 "fstat failed");
123 dir_mode = stat_buf.st_mode;
124
125 if ((dir_mode & PERMS) == PERMS)
126 tst_resm(TPASS, "Functionality of fchmod(%d, "
127 "%#o) successful", fd, PERMS);
128 else
129 tst_resm(TFAIL, "%s: Incorrect modes 0%03o, "
130 "Expected 0%03o",
131 TESTDIR, dir_mode, PERMS);
132 }
133
134 cleanup();
135 tst_exit();
136 }
137
138 /*
139 * void
140 * setup() - performs all ONE TIME setup for this test.
141 * Create a temporary directory and cd to it.
142 * Create another test directory under temporary directory.
143 * Open the test directory for reading.
144 */
setup(void)145 void setup(void)
146 {
147 tst_require_root();
148
149 tst_sig(NOFORK, DEF_HANDLER, cleanup);
150
151 /* Switch to nobody user for correct error code collection */
152 ltpuser = getpwnam(nobody_uid);
153 if (seteuid(ltpuser->pw_uid) == -1) {
154 tst_resm(TINFO, "seteuid failed to "
155 "to set the effective uid to %d", ltpuser->pw_uid);
156 perror("seteuid");
157 }
158
159 TEST_PAUSE;
160
161 tst_tmpdir();
162
163 /*
164 * Create a test directory under temporary directory with specified
165 * mode permissios and open it for reading/writing.
166 */
167 SAFE_MKDIR(cleanup, TESTDIR, DIR_MODE);
168 if ((fd = open(TESTDIR, O_RDONLY)) == -1) {
169 tst_brkm(TBROK, cleanup,
170 "open(%s, O_RDONLY) failed, errno=%d : %s",
171 TESTDIR, errno, strerror(errno));
172 }
173 }
174
175 /*
176 * void
177 * cleanup() - performs all ONE TIME cleanup for this test at
178 * completion or premature exit.
179 * Close the test directory opened during setup().
180 * Remove the test directory and temporary directory created in setup().
181 */
cleanup(void)182 void cleanup(void)
183 {
184
185 /* Close the test directory opened during setup() */
186 SAFE_CLOSE(NULL, fd);
187
188 tst_rmdir();
189
190 }
191