1 /* $OpenBSD: t_getlogin.c,v 1.2 2021/12/13 16:56:48 deraadt Exp $ */
2 /* $NetBSD: t_getlogin.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $ */
3
4 /*-
5 * Copyright (c) 2011 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jukka Ruohonen.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include "macros.h"
34
35 #include <sys/wait.h>
36
37 #include "atf-c.h"
38 #include <errno.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <limits.h>
42 #include <unistd.h>
43
44 ATF_TC(getlogin_r_err);
ATF_TC_HEAD(getlogin_r_err,tc)45 ATF_TC_HEAD(getlogin_r_err, tc)
46 {
47 atf_tc_set_md_var(tc, "descr", "Test errors from getlogin_r(2)");
48 }
49
ATF_TC_BODY(getlogin_r_err,tc)50 ATF_TC_BODY(getlogin_r_err, tc)
51 {
52 char small[0];
53
54 ATF_REQUIRE(getlogin_r(small, sizeof(small)) == ERANGE);
55 }
56
57 ATF_TC(getlogin_same);
ATF_TC_HEAD(getlogin_same,tc)58 ATF_TC_HEAD(getlogin_same, tc)
59 {
60 atf_tc_set_md_var(tc, "descr", "getlogin(2) vs. getlogin_r(2)");
61 }
62
ATF_TC_BODY(getlogin_same,tc)63 ATF_TC_BODY(getlogin_same, tc)
64 {
65 char buf[LOGIN_NAME_MAX];
66 char *str;
67
68 str = getlogin();
69
70 if (str == NULL)
71 return;
72
73 ATF_REQUIRE(getlogin_r(buf, sizeof(buf)) == 0);
74
75 if (strcmp(str, buf) != 0)
76 atf_tc_fail("getlogin(2) and getlogin_r(2) differ");
77 }
78
79 ATF_TC(setlogin_basic);
ATF_TC_HEAD(setlogin_basic,tc)80 ATF_TC_HEAD(setlogin_basic, tc)
81 {
82 atf_tc_set_md_var(tc, "descr", "Test that setlogin(2) works");
83 atf_tc_set_md_var(tc, "require.user", "root");
84 }
85
ATF_TC_BODY(setlogin_basic,tc)86 ATF_TC_BODY(setlogin_basic, tc)
87 {
88 char *name;
89 pid_t pid;
90 int sta;
91
92 pid = fork();
93 ATF_REQUIRE(pid >= 0);
94
95 if (pid == 0) {
96
97 (void)setsid();
98
99 if (setlogin("foobar") != 0)
100 _exit(EXIT_FAILURE);
101
102 name = getlogin();
103
104 if (name == NULL)
105 _exit(EXIT_FAILURE);
106
107 if (strcmp(name, "foobar") != 0)
108 _exit(EXIT_FAILURE);
109
110 _exit(EXIT_SUCCESS);
111 }
112
113 (void)wait(&sta);
114
115 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
116 atf_tc_fail("setlogin(2) failed to set login name");
117 }
118
119 ATF_TC(setlogin_err);
ATF_TC_HEAD(setlogin_err,tc)120 ATF_TC_HEAD(setlogin_err, tc)
121 {
122 atf_tc_set_md_var(tc, "descr", "Test errors from setlogin(2)");
123 atf_tc_set_md_var(tc, "require.user", "root");
124 }
125
ATF_TC_BODY(setlogin_err,tc)126 ATF_TC_BODY(setlogin_err, tc)
127 {
128 char buf[LOGIN_NAME_MAX + 1];
129 char *name;
130 pid_t pid;
131 int sta;
132
133 pid = fork();
134 ATF_REQUIRE(pid >= 0);
135
136 (void)memset(buf, 'x', sizeof(buf));
137
138 if (pid == 0) {
139
140 (void)setsid();
141
142 errno = 0;
143
144 if (setlogin(buf) != -1)
145 _exit(EINVAL);
146
147 if (errno != EINVAL)
148 _exit(EINVAL);
149
150 errno = 0;
151
152 if (setlogin((void *)-1) != -1)
153 _exit(EFAULT);
154
155 if (errno != EFAULT)
156 _exit(EFAULT);
157
158 name = getlogin();
159
160 if (name == NULL)
161 _exit(EXIT_FAILURE);
162
163 if (strcmp(name, "foobar") == 0)
164 _exit(EXIT_FAILURE);
165
166 _exit(EXIT_SUCCESS);
167 }
168
169 (void)wait(&sta);
170
171 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS) {
172
173 if (WEXITSTATUS(sta) == EFAULT)
174 atf_tc_fail("expected EFAULT, but the call succeeded");
175
176 if (WEXITSTATUS(sta) == EINVAL)
177 atf_tc_fail("expected EINVAL, but the call succeeded");
178
179 atf_tc_fail("setlogin(2) failed, but login name was set");
180 }
181 }
182
183 ATF_TC(setlogin_perm);
ATF_TC_HEAD(setlogin_perm,tc)184 ATF_TC_HEAD(setlogin_perm, tc)
185 {
186 atf_tc_set_md_var(tc, "descr", "Test setlogin(2) as normal user");
187 atf_tc_set_md_var(tc, "require.user", "unprivileged");
188 }
189
ATF_TC_BODY(setlogin_perm,tc)190 ATF_TC_BODY(setlogin_perm, tc)
191 {
192 char *name;
193 pid_t pid;
194 int sta;
195
196 pid = fork();
197 ATF_REQUIRE(pid >= 0);
198
199 if (pid == 0) {
200
201 (void)setsid();
202
203 errno = 0;
204
205 if (setlogin("foobar") != -1)
206 _exit(EXIT_FAILURE);
207
208 if (errno != EPERM)
209 _exit(EXIT_FAILURE);
210
211 name = getlogin();
212
213 if (name == NULL)
214 _exit(EXIT_FAILURE);
215
216 if (strcmp(name, "foobar") == 0)
217 _exit(EXIT_FAILURE);
218
219 _exit(EXIT_SUCCESS);
220 }
221
222 (void)wait(&sta);
223
224 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
225 atf_tc_fail("login name was set as an unprivileged user");
226 }
227
ATF_TP_ADD_TCS(tp)228 ATF_TP_ADD_TCS(tp)
229 {
230
231 ATF_TP_ADD_TC(tp, getlogin_r_err);
232 ATF_TP_ADD_TC(tp, getlogin_same);
233 ATF_TP_ADD_TC(tp, setlogin_basic);
234 ATF_TP_ADD_TC(tp, setlogin_err);
235 ATF_TP_ADD_TC(tp, setlogin_perm);
236
237 return atf_no_error();
238 }
239