setregid04.c revision 43088e16aa60d69e3ec5a69cdd8bdd45b8891127 
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20/*
21 * NAME
22 * 	setregid04.c
23 *
24 * DESCRIPTION
25 * 	Test setregid() when executed by root.
26 *
27 * ALGORITHM
28 *
29 *	Setup:
30 *	  Setup signal handling
31 *	  Get user information.
32 *	  Pause for SIGUSER1 if option specified.
33 *	Setup test values.
34 *	Loop if the proper options are given.
35 *	For each test set execute the system call
36 *	  Check return code, if system call failed (return=-1)
37 *		Log the errno and Issue a FAIL message.
38 *	  Otherwise,
39 *		Verify the Functionality of system call
40 *		if successful,
41 *			Issue Functionality-Pass message.
42 *		Otherwise,
43 *			Issue Functionality-Fail message.
44 *	Cleanup:
45 *	  Print errno log and/or timing stats if options given.
46 *
47 * USAGE:  <for command-line>
48 *	setregid04 [-c n] [-e] [-f] [-i n] [-I x] [-P x] [-t]
49 *	where,  -c n : Run n copies concurrently.
50 *		-e   : Turn on errno logging.
51 *		-f   : Turn off functionality Testing.
52 *		-i n : Execute test n times.
53 *		-I x : Execute test for x seconds.
54 *		-P x : Pause for x seconds between iterations.
55 *		-t   : Turn on syscall timing.
56 * History
57 *	07/2001 John George
58 *		-Ported
59 *
60 * Restrictions
61 * 	This test must be ran as root.
62 */
63
64#include <pwd.h>
65#include <grp.h>
66#include <malloc.h>
67#include <string.h>
68#include <test.h>
69#include <usctest.h>
70#include <errno.h>
71
72extern int Tst_count;
73
74char *TCID = "setregid04";
75gid_t users_gr_gid, root_gr_gid, daemon_gr_gid, bin_gr_gid;
76gid_t neg_one = -1;
77int exp_enos[] = { 0 };
78
79/* Avoid clashing with daemon in unistd.h. */
80struct group users_gr, daemon_gr, root_gr, bin_gr;
81
82/*
83 * The following structure contains all test data.  Each structure in the array
84 * is used for a separate test.  The tests are executed in the for loop below.
85 */
86
87struct test_data_t {
88	gid_t *real_gid;
89	gid_t *eff_gid;
90	struct group *exp_real_usr;
91	struct group *exp_eff_usr;
92	const char *test_msg;
93} test_data[] = {
94	{
95		&root_gr_gid, &root_gr_gid, &root_gr, &root_gr,
96		"After setregid(root, root),"
97	}, {
98		&users_gr_gid, &neg_one, &users_gr, &root_gr,
99		"After setregid(users, -1)"
100	}, {
101		&root_gr_gid, &neg_one, &root_gr, &root_gr,
102		"After setregid(root,-1),"
103	}, {
104		&neg_one, &neg_one, &root_gr, &root_gr,
105		"After setregid(-1, -1),"
106	}, {
107		&neg_one, &root_gr_gid, &root_gr, &root_gr,
108		"After setregid(-1, root)"
109	}, {
110		&root_gr_gid, &neg_one, &root_gr, &root_gr,
111		"After setregid(root, -1),"
112	}, {
113		&daemon_gr_gid, &users_gr_gid, &daemon_gr, &users_gr,
114		"After setregid(daemon, users)"
115	}, {
116		&neg_one, &neg_one, &daemon_gr, &users_gr,
117		"After setregid(-1, -1)"
118	}, {
119		&neg_one, &users_gr_gid, &daemon_gr, &users_gr,
120		"After setregid(-1, users)"
121	}
122};
123
124int TST_TOTAL = sizeof(test_data) / sizeof(test_data[0]);
125
126void setup(void);		/* Setup function for the test */
127void cleanup(void);		/* Cleanup function for the test */
128void gid_verify(struct group *ru, struct group *eu, const char *when);
129
130int main(int ac, char **av)
131{
132	int lc;			/* loop counter */
133	char *msg;		/* message returned from parse_opts */
134
135	/* parse standard options */
136	if ((msg = parse_opts(ac, av, NULL)	{
137		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
138		tst_exit();
139		/*NOTREACHED*/
140	}
141
142	/* Perform global setup for test */
143	setup();
144
145	/* check looping state if -i option is given */
146	for (lc = 0; TEST_LOOPING(lc); lc++) {
147		int i;
148
149		/* reset Tst_count in case we are looping */
150		Tst_count = 0;
151
152		for (i = 0; i < TST_TOTAL; i++) {
153			/* Set the real or effective group id */
154			TEST(setregid(*test_data[i].real_gid,
155				      *test_data[i].eff_gid));
156
157			if (TEST_RETURN == -1) {
158				TEST_ERROR_LOG(TEST_ERRNO);
159				tst_resm(TBROK, "setregid(%d, %d) failed",
160					 *test_data[i].real_gid,
161					 *test_data[i].eff_gid);
162			} else {
163				/*
164				 * Perform functional verification if test
165				 * executed without (-f) option.
166				 */
167				if (STD_FUNCTIONAL_TEST) {
168					gid_verify(test_data[i].exp_real_usr,
169						   test_data[i].exp_eff_usr,
170						   test_data[i].test_msg);
171				} else {
172					tst_resm(TPASS, "Call succeeded.");
173				}
174			}
175		}
176	}
177	cleanup();
178	/*NOTREACHED*/
179	return 0;
180}
181
182#define SAFE_GETGROUP(GROUPNAME)	\
183	if ((junk = getgrnam(#GROUPNAME)) == NULL) { \
184		tst_brkm(TBROK, NULL, "Couldn't find the `" #GROUPNAME "' group"); \
185		tst_exit(); \
186	} \
187	memcpy((void*) &GROUPNAME ## _gr, (const void*) junk, sizeof(struct group)); \
188	GROUPNAME ## _gr_gid = GROUPNAME ## _gr.gr_gid
189
190/*
191 * setup()
192 *	performs all ONE TIME setup for this test
193 */
194void setup(void)
195{
196	struct group *junk;
197
198	/* capture signals */
199	tst_sig(FORK, DEF_HANDLER, cleanup);
200
201	/* Check that the test process id is super/root  */
202	if (geteuid() != 0) {
203		tst_brkm(TBROK, NULL, "Must be root for this test!");
204		tst_exit();
205	}
206
207	/* set the expected errnos... */
208	TEST_EXP_ENOS(exp_enos);
209
210	SAFE_GETGROUP(root);
211	SAFE_GETGROUP(users);
212	SAFE_GETGROUP(daemon);
213	SAFE_GETGROUP(bin);
214
215	/* Pause if that option was specified
216	 * TEST_PAUSE contains the code to fork the test with the -c option.
217	 */
218	TEST_PAUSE;
219}
220
221/*
222 * cleanup()
223 *	performs all ONE TIME cleanup for this test at
224 *	completion or premature exit
225 */
226void cleanup(void)
227{
228	/*
229	 * print timing stats if that option was specified.
230	 * print errno log if that option was specified.
231	 */
232	TEST_CLEANUP;
233
234	/* exit with return code appropriate for results */
235	tst_exit();
236	/*NOTREACHED*/
237}
238
239void gid_verify(struct group *rg, struct group *eg, const char *when)
240{
241	if ((getgid() != rg->gr_gid) || (getegid() != eg->gr_gid)) {
242		tst_resm(TFAIL, "ERROR: %s real gid = %d; effective gid = %d",
243			 when, getgid(), getegid());
244		tst_resm(TINFO, "Expected: real gid = %d; effective gid = %d",
245			 rg->gr_gid, eg->gr_gid);
246	} else {
247		tst_resm(TPASS, "real or effective gid was modified as "
248			 "expected");
249	}
250}
251