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: fchmod03
22 *
23 * Test Description:
24 * Verify that, fchmod(2) will succeed to change the mode of a file
25 * and set the sticky bit on it if invoked by non-root (uid != 0)
26 * process with the following constraints,
27 * - the process is the owner of the file.
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 file.
30 *
31 * Expected Result:
32 * fchmod() should return value 0 on success and succeeds to change
33 * the mode of specified file, sets sticky bit on it.
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 * fchmod03 [-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 file */
87 char *TCID = "fchmod03";
88 int TST_TOTAL = 1;
89
90 char nobody_uid[] = "nobody";
91 struct passwd *ltpuser;
92
93 void setup(); /* Main setup function for the test */
94 void cleanup(); /* Main cleanup function for the test */
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 file_mode; /* mode permissions set on testfile */
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 TEST(fchmod(fd, PERMS));
111
112 if (TEST_RETURN == -1) {
113 tst_resm(TFAIL | TTERRNO, "fchmod failed");
114 continue;
115 }
116 /*
117 * Get the file information using
118 * fstat(2).
119 */
120 if (fstat(fd, &stat_buf) == -1)
121 tst_brkm(TFAIL | TERRNO, cleanup,
122 "fstat failed");
123 file_mode = stat_buf.st_mode;
124
125 /* Verify STICKY BIT set on testfile */
126 if ((file_mode & PERMS) != PERMS)
127 tst_resm(TFAIL, "%s: Incorrect modes 0%3o, "
128 "Expected 0777", TESTFILE, file_mode);
129 else
130 tst_resm(TPASS, "Functionality of fchmod(%d, "
131 "%#o) successful", fd, PERMS);
132 }
133
134 cleanup();
135 tst_exit();
136 }
137
setup(void)138 void setup(void)
139 {
140
141 tst_sig(NOFORK, DEF_HANDLER, cleanup);
142
143 tst_require_root();
144
145 ltpuser = getpwnam(nobody_uid);
146 if (ltpuser == NULL)
147 tst_brkm(TBROK | TERRNO, NULL, "getpwnam failed");
148 SAFE_SETEUID(NULL, ltpuser->pw_uid);
149
150 TEST_PAUSE;
151
152 tst_tmpdir();
153
154 /*
155 * Create a test file under temporary directory with specified
156 * mode permissios and set the ownership of the test file to the
157 * uid/gid of guest user.
158 */
159 if ((fd = open(TESTFILE, O_RDWR | O_CREAT, FILE_MODE)) == -1)
160 tst_brkm(TBROK | TERRNO, cleanup, "open failed");
161 }
162
cleanup(void)163 void cleanup(void)
164 {
165 if (close(fd) == -1)
166 tst_resm(TWARN | TERRNO, "close failed");
167
168 tst_rmdir();
169
170 }
171