chroot04.c revision aabb8340f63ed31afe995fd97795e542dc68b93c 
1 /*
2  *   Copyright (C) Bull S.A. 2001
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 * NAME
22 * 		 chroot04.c
23 *
24 * DESCRIPTION
25 *		 Testcase to check that chroot sets errno to EACCES.
26 *
27 * ALGORITHM
28 *		 As a non-root user attempt to perform chroot() to a directory. The
29 *		 chroot() call should fail with EACCES
30 *
31 * USAGE:  <for command-line>
32 *  chroot04 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
33 *     where,  -c n : Run n copies concurrently.
34 *             -e   : Turn on errno logging.
35 *             -i n : Execute test n times.
36 *             -I x : Execute test for x seconds.
37 *             -P x : Pause for x seconds between iterations.
38 *             -t   : Turn on syscall timing.
39 *
40 * HISTORY
41 *		 04/2002 Ported by Jacky Malcles
42 *
43 * RESTRICTIONS
44 * 		 Must be run as non-root user.
45 */
46
47#include <stdio.h>
48#include <errno.h>
49#include <sys/stat.h>
50#include "test.h"
51#include <pwd.h>
52
53char *TCID = "chroot04";
54int TST_TOTAL = 1;
55
56#define TEST_TMPDIR	"chroot04_tmpdir"
57
58char nobody_uid[] = "nobody";
59struct passwd *ltpuser;
60
61void setup(void);
62void cleanup(void);
63
64int main(int ac, char **av)
65{
66	int lc;
67	const char *msg;
68
69	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL)
70		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
71
72	setup();
73
74	/* Check for looping state if -i option is given */
75	for (lc = 0; TEST_LOOPING(lc); lc++) {
76
77		/* reset tst_count in case we are looping */
78		tst_count = 0;
79
80		TEST(chroot(TEST_TMPDIR));
81
82		if (TEST_RETURN != -1)
83			tst_resm(TFAIL, "call succeeded unexpectedly");
84		else if (TEST_ERRNO == EACCES)
85			tst_resm(TPASS, "got EACCESS as expected");
86		else
87			tst_resm(TFAIL | TTERRNO,
88				 "did not get EACCES as expected");
89
90	}
91	cleanup();
92
93	tst_exit();
94
95}
96
97/*
98 * setup() - performs all ONE TIME setup for this test.
99 */
100void setup(void)
101{
102	tst_sig(NOFORK, DEF_HANDLER, cleanup);
103
104	TEST_PAUSE;
105
106	/* make a temporary directory and cd to it */
107	tst_tmpdir();
108
109	/*
110	 * create a temporary directory
111	 */
112	if (mkdir(TEST_TMPDIR, 0222) != 0) {
113		tst_resm(TBROK, "mkdir(%s) failed", TEST_TMPDIR);
114	}
115
116	ltpuser = getpwnam(nobody_uid);
117	if (seteuid(ltpuser->pw_uid) == -1) {
118		tst_brkm(TBROK, cleanup, "seteuid to nobody failed");
119	}
120
121}
122
123/*
124 * cleanup() - performs all ONE TIME cleanup for this test at
125 *		        completion or premature exit.
126 */
127void cleanup(void)
128{
129	/* reset the process ID to the saved ID (root) */
130	if (setuid(0) == -1) {
131		tst_brkm(TBROK | TERRNO, NULL, "setuid(0) failed");
132	}
133	if (rmdir(TEST_TMPDIR) != 0) {
134		tst_brkm(TFAIL | TERRNO, NULL, "rmdir(%s) failed", TEST_TMPDIR);
135	}
136
137	/* delete the test directory created in setup() */
138	tst_rmdir();
139
140}
141