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
85 #define DIR_MODE S_IRWXU | S_IRWXG | S_IRWXO
86 #define PERMS 01777 /*
87 * Mode permissions of test directory with
88 * sticky bit set.
89 */
90 #define TESTDIR "testdir_4"
91
92 int fd; /* file descriptor for test directory */
93 char *TCID = "fchmod04";
94 int TST_TOTAL = 1;
95
96 char nobody_uid[] = "nobody";
97 struct passwd *ltpuser;
98
99 void setup();
100 void cleanup();
101
main(int ac,char ** av)102 int main(int ac, char **av)
103 {
104 struct stat stat_buf; /* stat struct. */
105 int lc;
106 mode_t dir_mode; /* mode permissions set on testdirectory */
107
108 tst_parse_opts(ac, av, NULL, NULL);
109
110 setup();
111
112 for (lc = 0; TEST_LOOPING(lc); lc++) {
113
114 tst_count = 0;
115
116 /*
117 * Call fchmod(2) with mode argument to
118 * set sticky bit on TESTDIR
119 */
120 TEST(fchmod(fd, PERMS));
121
122 if (TEST_RETURN == -1) {
123 tst_resm(TFAIL | TTERRNO, "fchmod failed");
124 continue;
125 }
126 if (fstat(fd, &stat_buf) == -1)
127 tst_brkm(TFAIL | TERRNO, cleanup,
128 "fstat failed");
129 dir_mode = stat_buf.st_mode;
130
131 if ((dir_mode & PERMS) == PERMS)
132 tst_resm(TPASS, "Functionality of fchmod(%d, "
133 "%#o) successful", fd, PERMS);
134 else
135 tst_resm(TFAIL, "%s: Incorrect modes 0%03o, "
136 "Expected 0%03o",
137 TESTDIR, dir_mode, PERMS);
138 }
139
140 cleanup();
141 tst_exit();
142 }
143
144 /*
145 * void
146 * setup() - performs all ONE TIME setup for this test.
147 * Create a temporary directory and cd to it.
148 * Create another test directory under temporary directory.
149 * Open the test directory for reading.
150 */
setup(void)151 void setup(void)
152 {
153 tst_require_root();
154
155 tst_sig(NOFORK, DEF_HANDLER, cleanup);
156
157 /* Switch to nobody user for correct error code collection */
158 ltpuser = getpwnam(nobody_uid);
159 if (seteuid(ltpuser->pw_uid) == -1) {
160 tst_resm(TINFO, "seteuid failed to "
161 "to set the effective uid to %d", ltpuser->pw_uid);
162 perror("seteuid");
163 }
164
165 TEST_PAUSE;
166
167 tst_tmpdir();
168
169 /*
170 * Create a test directory under temporary directory with specified
171 * mode permissios and open it for reading/writing.
172 */
173 SAFE_MKDIR(cleanup, TESTDIR, DIR_MODE);
174 if ((fd = open(TESTDIR, O_RDONLY)) == -1) {
175 tst_brkm(TBROK, cleanup,
176 "open(%s, O_RDONLY) failed, errno=%d : %s",
177 TESTDIR, errno, strerror(errno));
178 }
179 }
180
181 /*
182 * void
183 * cleanup() - performs all ONE TIME cleanup for this test at
184 * completion or premature exit.
185 * Close the test directory opened during setup().
186 * Remove the test directory and temporary directory created in setup().
187 */
cleanup(void)188 void cleanup(void)
189 {
190
191 /* Close the test directory opened during setup() */
192 SAFE_CLOSE(NULL, fd);
193
194 tst_rmdir();
195
196 }
197