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 <sys/fcntl.h>
77 #include <errno.h>
78 #include <string.h>
79 #include <signal.h>
80 #include <pwd.h>
81
82 #include "test.h"
83
84 #define FILE_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
85 #define PERMS 01777
86 #define TESTFILE "testfile"
87
88 int fd; /* file descriptor for test file */
89 char *TCID = "fchmod03";
90 int TST_TOTAL = 1;
91
92 char nobody_uid[] = "nobody";
93 struct passwd *ltpuser;
94
95 void setup(); /* Main setup function for the test */
96 void cleanup(); /* Main cleanup function for the test */
97
main(int ac,char ** av)98 int main(int ac, char **av)
99 {
100 struct stat stat_buf; /* stat struct. */
101 int lc;
102 mode_t file_mode; /* mode permissions set on testfile */
103
104 tst_parse_opts(ac, av, NULL, NULL);
105
106 setup();
107
108 for (lc = 0; TEST_LOOPING(lc); lc++) {
109
110 tst_count = 0;
111
112 TEST(fchmod(fd, PERMS));
113
114 if (TEST_RETURN == -1) {
115 tst_resm(TFAIL | TTERRNO, "fchmod failed");
116 continue;
117 }
118 /*
119 * Get the file information using
120 * fstat(2).
121 */
122 if (fstat(fd, &stat_buf) == -1)
123 tst_brkm(TFAIL | TERRNO, cleanup,
124 "fstat failed");
125 file_mode = stat_buf.st_mode;
126
127 /* Verify STICKY BIT set on testfile */
128 if ((file_mode & PERMS) != PERMS)
129 tst_resm(TFAIL, "%s: Incorrect modes 0%3o, "
130 "Expected 0777", TESTFILE, file_mode);
131 else
132 tst_resm(TPASS, "Functionality of fchmod(%d, "
133 "%#o) successful", fd, PERMS);
134 }
135
136 cleanup();
137 tst_exit();
138 }
139
setup(void)140 void setup(void)
141 {
142
143 tst_sig(NOFORK, DEF_HANDLER, cleanup);
144
145 tst_require_root();
146
147 ltpuser = getpwnam(nobody_uid);
148 if (ltpuser == NULL)
149 tst_brkm(TBROK | TERRNO, NULL, "getpwnam failed");
150 if (seteuid(ltpuser->pw_uid) == -1)
151 tst_brkm(TBROK | TERRNO, NULL, "seteuid failed");
152
153 TEST_PAUSE;
154
155 tst_tmpdir();
156
157 /*
158 * Create a test file under temporary directory with specified
159 * mode permissios and set the ownership of the test file to the
160 * uid/gid of guest user.
161 */
162 if ((fd = open(TESTFILE, O_RDWR | O_CREAT, FILE_MODE)) == -1)
163 tst_brkm(TBROK | TERRNO, cleanup, "open failed");
164 }
165
cleanup(void)166 void cleanup(void)
167 {
168 if (close(fd) == -1)
169 tst_resm(TWARN | TERRNO, "close failed");
170
171 tst_rmdir();
172
173 }
174