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: getresgid01
22  *
23  * Test Description:
24  *  Verify that getresgid() will be successful to get the real, effective
25  *  and saved user id of the calling process.
26  *
27  * Expected Result:
28  *  getresgid() should return with 0 value and the real/effective/saved
29  *  user ids should be equal to that of calling process.
30  *
31  * Algorithm:
32  *  Setup:
33  *   Setup signal handling.
34  *   Pause for SIGUSR1 if option specified.
35  *
36  *  Test:
37  *   Loop if the proper options are given.
38  *   Execute system call
39  *   Check return code, if system call failed (return=-1)
40  *	Log the errno and Issue a FAIL message.
41  *   Otherwise,
42  *	Verify the Functionality of system call
43  *      if successful,
44  *		Issue Functionality-Pass message.
45  *      Otherwise,
46  *		Issue Functionality-Fail message.
47  *  Cleanup:
48  *   Print errno log and/or timing stats if options given
49  *
50  * Usage:  <for command-line>
51  *  getresgid01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
52  *     where,  -c n : Run n copies concurrently.
53  *             -f   : Turn off functionality Testing.
54  *	       -i n : Execute test n times.
55  *	       -I x : Execute test for x seconds.
56  *	       -P x : Pause for x seconds between iterations.
57  *	       -t   : Turn on syscall timing.
58  *
59  * HISTORY
60  *	07/2001 Ported by Wayne Boyer
61  *
62  * RESTRICTIONS:
63  *  None.
64  *
65  */
66 
67 #include <stdio.h>
68 #include <unistd.h>
69 #include <sys/types.h>
70 #include <errno.h>
71 #include <fcntl.h>
72 #include <string.h>
73 #include <signal.h>
74 
75 #include "test.h"
76 
77 extern int getresgid(gid_t *, gid_t *, gid_t *);
78 
79 char *TCID = "getresgid01";
80 int TST_TOTAL = 1;
81 gid_t pr_gid, pe_gid, ps_gid;	/* calling process real/effective/saved gid */
82 
83 void setup();			/* Main setup function of test */
84 void cleanup();			/* cleanup function for the test */
85 
86 int main(int ac, char **av)
87 {
88 	int lc;
89 	gid_t real_gid,		/* real/eff./saved user id from getresgid() */
90 	 eff_gid, sav_gid;
91 
92 	tst_parse_opts(ac, av, NULL, NULL);
93 
94 	setup();
95 
96 	for (lc = 0; TEST_LOOPING(lc); lc++) {
97 
98 		tst_count = 0;
99 
100 		/*
101 		 * Call getresgid() to get the real/effective/saved
102 		 * user id's of the calling process.
103 		 */
104 		TEST(getresgid(&real_gid, &eff_gid, &sav_gid));
105 
106 		if (TEST_RETURN == -1) {
107 			tst_resm(TFAIL, "getresgid() Failed, errno=%d : %s",
108 				 TEST_ERRNO, strerror(TEST_ERRNO));
109 			continue;
110 		}
111 		/*
112 		 * Verify the real/effective/saved gid values returned
113 		 * by getresgid with the expected values.
114 		 */
115 		if ((real_gid != pr_gid) || (eff_gid != pe_gid) ||
116 		    (sav_gid != ps_gid)) {
117 			tst_resm(TFAIL, "real:%d, effective:%d, "
118 				 "saved-user:%d ids differ",
119 				 real_gid, eff_gid, sav_gid);
120 		} else {
121 			tst_resm(TPASS, "Functionality of getresgid() "
122 				 "successful");
123 		}
124 	}
125 
126 	cleanup();
127 	tst_exit();
128 }
129 
130 /*
131  * setup() - performs all ONE TIME setup for this test.
132  *	     Get the real/effective/saved user id of the calling process.
133  */
134 void setup(void)
135 {
136 
137 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
138 
139 	TEST_PAUSE;
140 
141 	/* Real user-id of the calling process */
142 	pr_gid = getgid();
143 
144 	/* Effective user-id of the calling process */
145 	pe_gid = getegid();
146 
147 	/* Saved user-id of the calling process */
148 	ps_gid = getegid();
149 
150 }
151 
152 /*
153  * cleanup() - performs all ONE TIME cleanup for this test at
154  *             completion or premature exit.
155  */
156 void cleanup(void)
157 {
158 
159 }
160