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
84#define DIR_MODE 	S_IRWXU | S_IRWXG | S_IRWXO
85#define PERMS		01777	/*
86				 * Mode permissions of test directory with
87				 * sticky bit set.
88				 */
89#define TESTDIR		"testdir_4"
90
91int fd;				/* file descriptor for test directory */
92char *TCID = "fchmod04";
93int TST_TOTAL = 1;
94
95char nobody_uid[] = "nobody";
96struct passwd *ltpuser;
97
98void setup();
99void cleanup();
100
101int main(int ac, char **av)
102{
103	struct stat stat_buf;	/* stat struct. */
104	int lc;
105	mode_t dir_mode;	/* mode permissions set on testdirectory */
106
107	tst_parse_opts(ac, av, NULL, NULL);
108
109	setup();
110
111	for (lc = 0; TEST_LOOPING(lc); lc++) {
112
113		tst_count = 0;
114
115		/*
116		 * Call fchmod(2) with mode argument to
117		 * set sticky bit on TESTDIR
118		 */
119		TEST(fchmod(fd, PERMS));
120
121		if (TEST_RETURN == -1) {
122			tst_resm(TFAIL | TTERRNO, "fchmod failed");
123			continue;
124		}
125		if (fstat(fd, &stat_buf) == -1)
126			tst_brkm(TFAIL | TERRNO, cleanup,
127				 "fstat failed");
128		dir_mode = stat_buf.st_mode;
129
130		if ((dir_mode & PERMS) == PERMS)
131			tst_resm(TPASS, "Functionality of fchmod(%d, "
132				 "%#o) successful", fd, PERMS);
133		else
134			tst_resm(TFAIL, "%s: Incorrect modes 0%03o, "
135				 "Expected 0%03o",
136				 TESTDIR, dir_mode, PERMS);
137	}
138
139	cleanup();
140	tst_exit();
141}
142
143/*
144 * void
145 * setup() - performs all ONE TIME setup for this test.
146 *  Create a temporary directory and cd to it.
147 *  Create another test directory under temporary directory.
148 *  Open the test directory for reading.
149 */
150void setup(void)
151{
152	tst_require_root();
153
154	tst_sig(NOFORK, DEF_HANDLER, cleanup);
155
156	/* Switch to nobody user for correct error code collection */
157	ltpuser = getpwnam(nobody_uid);
158	if (seteuid(ltpuser->pw_uid) == -1) {
159		tst_resm(TINFO, "seteuid failed to "
160			 "to set the effective uid to %d", ltpuser->pw_uid);
161		perror("seteuid");
162	}
163
164	TEST_PAUSE;
165
166	tst_tmpdir();
167
168	/*
169	 * Create a test directory under temporary directory with specified
170	 * mode permissios and open it for reading/writing.
171	 */
172	if (mkdir(TESTDIR, DIR_MODE) < 0) {
173		tst_brkm(TBROK, cleanup, "mkdir(2) of %s failed", TESTDIR);
174	}
175	if ((fd = open(TESTDIR, O_RDONLY)) == -1) {
176		tst_brkm(TBROK, cleanup,
177			 "open(%s, O_RDONLY) failed, errno=%d : %s",
178			 TESTDIR, errno, strerror(errno));
179	}
180}
181
182/*
183 * void
184 * cleanup() - performs all ONE TIME cleanup for this test at
185 *		completion or premature exit.
186 *  Close the test directory opened during setup().
187 *  Remove the test directory and temporary directory created in setup().
188 */
189void cleanup(void)
190{
191
192	/* Close the test directory opened during setup() */
193	if (close(fd) == -1) {
194		tst_brkm(TBROK, NULL,
195			 "close(%s) Failed, errno=%d : %s",
196			 TESTDIR, errno, strerror(errno));
197	}
198
199	tst_rmdir();
200
201}
202