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: getresuid01
22  *
23  * Test Description:
24  *  Verify that getresuid() will be successful to get the real, effective
25  *  and saved user id of the calling process.
26  *
27  * Expected Result:
28  *  getresuid() 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  *  getresuid01 [-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 #include <stdio.h>
67 #include <unistd.h>
68 #include <sys/types.h>
69 #include <errno.h>
70 #include <fcntl.h>
71 #include <string.h>
72 #include <signal.h>
73 
74 #include "test.h"
75 
76 extern int getresuid(uid_t *, uid_t *, uid_t *);
77 
78 char *TCID = "getresuid01";
79 int TST_TOTAL = 1;
80 uid_t pr_uid, pe_uid, ps_uid;	/* calling process real/effective/saved uid */
81 
82 void setup();			/* Main setup function of test */
83 void cleanup();			/* cleanup function for the test */
84 
85 int main(int ac, char **av)
86 {
87 	int lc;
88 	uid_t real_uid,		/* real/eff./saved user id from getresuid() */
89 	 eff_uid, sav_uid;
90 
91 	tst_parse_opts(ac, av, NULL, NULL);
92 
93 	setup();
94 
95 	for (lc = 0; TEST_LOOPING(lc); lc++) {
96 
97 		tst_count = 0;
98 
99 		/*
100 		 * Call getresuid() to get the real/effective/saved
101 		 * user id's of the calling process.
102 		 */
103 		TEST(getresuid(&real_uid, &eff_uid, &sav_uid));
104 
105 		if (TEST_RETURN == -1) {
106 			tst_resm(TFAIL, "getresuid() Failed, errno=%d : %s",
107 				 TEST_ERRNO, strerror(TEST_ERRNO));
108 			continue;
109 		}
110 
111 		if ((real_uid != pr_uid) || (eff_uid != pe_uid) ||
112 		    (sav_uid != ps_uid)) {
113 			tst_resm(TFAIL, "real:%d, effective:%d, "
114 				 "saved-user:%d ids differ",
115 				 real_uid, eff_uid, sav_uid);
116 		} else {
117 			tst_resm(TPASS, "Functionality of getresuid() "
118 				 "successful");
119 		}
120 	}
121 
122 	cleanup();
123 	tst_exit();
124 }
125 
126 /*
127  * setup() - performs all ONE TIME setup for this test.
128  *	     Get the real/effective/saved user id of the calling process.
129  */
130 void setup(void)
131 {
132 
133 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
134 
135 	TEST_PAUSE;
136 
137 	/* Real user-id of the calling process */
138 	pr_uid = getuid();
139 
140 	/* Effective user-id of the calling process */
141 	pe_uid = geteuid();
142 
143 	/* Saved user-id of the calling process */
144 	ps_uid = geteuid();
145 
146 }
147 
148 /*
149  * cleanup() - performs all ONE TIME cleanup for this test at
150  *             completion or premature exit.
151  */
152 void cleanup(void)
153 {
154 
155 }
156