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1 /*
2  * Copyright (c) Wipro Technologies Ltd, 2002.  All Rights Reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms of version 2 of the GNU General Public License as
6  * published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it would be useful, but
9  * WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11  *
12  * You should have received a copy of the GNU General Public License along
13  * with this program; if not, write the Free Software Foundation, Inc.,
14  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
15  *
16  */
17 /**********************************************************
18  *
19  *    TEST IDENTIFIER	: iopl02
20  *
21  *    EXECUTED BY	: superuser
22  *
23  *    TEST TITLE	: Tests for error conditions
24  *
25  *    TEST CASE TOTAL	: 2
26  *
27  *    AUTHOR		: Subhab Biwas <subhabrata.biswas@wipro.com>
28  *
29  *    SIGNALS
30  * 	Uses SIGUSR1 to pause before test if option set.
31  * 	(See the parse_opts(3) man page).
32  *
33  *    DESCRIPTION
34  *	Verify that
35  *	1) iopl(2) returns -1 and sets errno to EINVAL for privilege
36  *	   level greater than 3.
37  *	2) iopl(2) returns -1 and sets errno to EPERM if the current
38  *	   user is not the super-user.
39  *
40  * 	Setup:
41  * 	  Setup signal handling.
42  *	  Test caller is superuser
43  *	  Set expected errnos for logging
44  *	  Pause for SIGUSR1 if option specified.
45  *
46  * 	Test:
47  *	 Loop if the proper options are given.
48  * 	  Execute system call
49  *	  Check return code and error number, if matching,
50  *		     Issue PASS message
51  *	  Otherwise,
52  *		     Issue FAIL message
53  *	  Perform testcase specific cleanup (if needed)
54  *
55  * 	Cleanup:
56  * 	  Print errno log and/or timing stats if options given
57  *
58  * USAGE:  <for command-line>
59  * iopl02 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p]
60  *			where,  -c n : Run n copies concurrently.
61  *				-e   : Turn on errno logging.
62  *				-h   : Show help screen
63  *				-f   : Turn off functional testing
64  *				-i n : Execute test n times.
65  *				-I x : Execute test for x seconds.
66  *				-p   : Pause for SIGUSR1 before starting
67  *				-P x : Pause for x seconds between iterations.
68  *				-t   : Turn on syscall timing.
69  *
70  ****************************************************************/
71 
72 char *TCID = "iopl02";
73 
74 #if defined __i386__ || defined(__x86_64__)
75 
76 #include <errno.h>
77 #include <unistd.h>
78 #include <sys/io.h>
79 #include <pwd.h>
80 #include "test.h"
81 #include "safe_macros.h"
82 
83 #define INVALID_LEVEL 4		/* Invalid privilege level */
84 #define EXP_RET_VAL -1
85 
86 static void setup();
87 static int setup1(void);
88 static void cleanup1();
89 static void cleanup();
90 
91 static char nobody_uid[] = "nobody";
92 struct passwd *ltpuser;
93 
94 struct test_cases_t {
95 	int level;		/* I/O privilege level */
96 	char *desc;		/* test case description */
97 	int exp_errno;		/* expected error number */
98 } test_cases[] = {
99 	{
100 	INVALID_LEVEL, "Invalid privilege level", EINVAL}, {
101 	1, "Non super-user", EPERM}
102 };
103 
104 int TST_TOTAL = sizeof(test_cases) / sizeof(test_cases[0]);
105 
main(int ac,char ** av)106 int main(int ac, char **av)
107 {
108 
109 	int lc, i;
110 
111 	tst_parse_opts(ac, av, NULL, NULL);
112 
113 	setup();
114 
115 	for (lc = 0; TEST_LOOPING(lc); lc++) {
116 
117 		tst_count = 0;
118 
119 		for (i = 0; i < TST_TOTAL; ++i) {
120 
121 			if (i == 1) {
122 				/* setup Non super-user for second test */
123 				if (setup1()) {
124 					/* setup1() failed, skip this test */
125 					continue;
126 				}
127 			}
128 
129 			/*
130 			 * Call iopl(2)
131 			 */
132 			TEST(iopl(test_cases[i].level));
133 
134 			if ((TEST_RETURN == EXP_RET_VAL) &&
135 			    (TEST_ERRNO == test_cases[i].exp_errno)) {
136 				tst_resm(TPASS, "Expected failure for %s, "
137 					 "errno: %d", test_cases[i].desc,
138 					 TEST_ERRNO);
139 			} else {
140 				tst_resm(TFAIL, "Unexpected results for %s ; "
141 					 "returned %ld (expected %d), errno %d "
142 					 "(expected errno  %d)",
143 					 test_cases[i].desc,
144 					 TEST_RETURN, EXP_RET_VAL,
145 					 TEST_ERRNO, test_cases[i].exp_errno);
146 			}
147 
148 			if (i == 1) {
149 				/* revert back to super user */
150 				cleanup1();
151 			}
152 
153 		}
154 	}
155 
156 	/* cleanup and exit */
157 	cleanup();
158 
159 	tst_exit();
160 
161 }
162 
163 /* setup1() - set up non-super user for second test case */
setup1(void)164 int setup1(void)
165 {
166 	/* switch to "nobody" user */
167 	if (seteuid(ltpuser->pw_uid) == -1) {
168 		tst_resm(TWARN, "Failed to set effective"
169 			 "uid to %d", ltpuser->pw_uid);
170 		return 1;
171 	}
172 	return 0;
173 }
174 
175 /* cleanup1() - reset to super user for first test case */
cleanup1(void)176 void cleanup1(void)
177 {
178 	/* reset user as root */
179 	SAFE_SETEUID(NULL, 0);
180 }
181 
182 /* setup() - performs all ONE TIME setup for this test */
setup(void)183 void setup(void)
184 {
185 	tst_require_root();
186 
187 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
188 
189 	/* Check if "nobody" user id exists */
190 	if ((ltpuser = getpwnam(nobody_uid)) == NULL) {
191 		tst_brkm(TBROK, NULL, "\"nobody\" user id doesn't exist");
192 	}
193 
194 	TEST_PAUSE;
195 
196 }
197 
198 /*
199  *cleanup() -  performs all ONE TIME cleanup for this test at
200  *		completion or premature exit.
201  */
cleanup(void)202 void cleanup(void)
203 {
204 
205 }
206 
207 #else /* __i386__ */
208 
209 #include "test.h"
210 #include "safe_macros.h"
211 
212 int TST_TOTAL = 0;
213 
main(void)214 int main(void)
215 {
216 	tst_resm(TPASS,
217 		 "LSB v1.3 does not specify iopl() for this architecture.");
218 	tst_exit();
219 }
220 
221 #endif /* __i386__ */
222