chroot04.c revision 1e6f5a673655551de5734ff31ef48cd63b604e6d 
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 "usctest.h"
52#include <pwd.h>
53
54char *TCID = "chroot04";
55int TST_TOTAL = 1;
56
57#define TEST_TMPDIR	"chroot04_tmpdir"
58
59int exp_enos[] = { EACCES, 0 };
60char nobody_uid[] = "nobody";
61struct passwd *ltpuser;
62
63void setup(void);
64void cleanup(void);
65
66int main(int ac, char **av)
67{
68	int lc;
69	char *msg;
70
71	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL)
72		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
73
74	setup();
75
76	/* set up expected errnos */
77	TEST_EXP_ENOS(exp_enos);
78
79	/* Check for looping state if -i option is given */
80	for (lc = 0; TEST_LOOPING(lc); lc++) {
81
82		/* reset Tst_count in case we are looping */
83		Tst_count = 0;
84
85		TEST(chroot(TEST_TMPDIR));
86
87		if (TEST_RETURN != -1)
88			tst_resm(TFAIL, "call succeeded unexpectedly");
89		else if (TEST_ERRNO == EACCES)
90			tst_resm(TPASS, "got EACCESS as expected");
91		else
92			tst_resm(TFAIL|TTERRNO, "did not get EACCES as expected");
93
94	}
95	cleanup();
96
97	tst_exit();
98
99}
100
101/*
102 * setup() - performs all ONE TIME setup for this test.
103 */
104void setup()
105{
106	tst_sig(NOFORK, DEF_HANDLER, cleanup);
107
108	TEST_PAUSE;
109
110	/* make a temporary directory and cd to it */
111	tst_tmpdir();
112
113	/*
114	 * create a temporary directory
115	 */
116	if (mkdir(TEST_TMPDIR, 0222) != 0) {
117		tst_resm(TBROK, "mkdir(%s) failed", TEST_TMPDIR);
118	}
119
120	ltpuser = getpwnam(nobody_uid);
121	if (seteuid(ltpuser->pw_uid) == -1) {
122		tst_brkm(TBROK, cleanup, "seteuid to nobody failed");
123	}
124
125}
126
127/*
128 * cleanup() - performs all ONE TIME cleanup for this test at
129 *		        completion or premature exit.
130 */
131void cleanup()
132{
133	/* reset the process ID to the saved ID (root) */
134	if (setuid(0) == -1) {
135		tst_brkm(TBROK|TERRNO, NULL, "setuid(0) failed");
136	}
137	if (rmdir(TEST_TMPDIR) != 0) {
138		tst_brkm(TFAIL|TERRNO, NULL, "rmdir(%s) failed", TEST_TMPDIR);
139	}
140	/*
141	 * print timing stats if that option was specified.
142	 * print errno log if that option was specified.
143	 */
144	TEST_CLEANUP;
145
146	/* delete the test directory created in setup() */
147	tst_rmdir();
148
149}