1 /* $NetBSD: t_revoke.c,v 1.2 2017/01/13 21:15:57 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 #include <sys/cdefs.h>
32 __RCSID("$NetBSD: t_revoke.c,v 1.2 2017/01/13 21:15:57 christos Exp $");
33
34 #include <sys/resource.h>
35 #include <sys/wait.h>
36
37 #include <atf-c.h>
38 #include <fcntl.h>
39 #include <errno.h>
40 #include <pwd.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45
46 static const char path[] = "revoke";
47
48 ATF_TC_WITH_CLEANUP(revoke_basic);
ATF_TC_HEAD(revoke_basic,tc)49 ATF_TC_HEAD(revoke_basic, tc)
50 {
51 atf_tc_set_md_var(tc, "descr", "A basic test of revoke(2)");
52 }
53
ATF_TC_BODY(revoke_basic,tc)54 ATF_TC_BODY(revoke_basic, tc)
55 {
56 struct rlimit res;
57 char tmp[10];
58 size_t i, n;
59 int *buf;
60
61 #ifdef __FreeBSD__
62 atf_tc_skip("revoke(2) is only implemented for devfs(4).");
63 #endif
64 (void)memset(&res, 0, sizeof(struct rlimit));
65 (void)getrlimit(RLIMIT_NOFILE, &res);
66
67 if ((n = res.rlim_cur / 10) == 0)
68 n = 10;
69
70 buf = calloc(n, sizeof(int));
71 ATF_REQUIRE(buf != NULL);
72
73 buf[0] = open(path, O_RDWR | O_CREAT, 0600);
74 ATF_REQUIRE(buf[0] >= 0);
75
76 for (i = 1; i < n; i++) {
77 buf[i] = open(path, O_RDWR);
78 ATF_REQUIRE(buf[i] >= 0);
79 }
80
81 ATF_REQUIRE(revoke(path) == 0);
82
83 for (i = 0; i < n; i++) {
84
85 ATF_REQUIRE(read(buf[i], tmp, sizeof(tmp)) == -1);
86
87 (void)close(buf[i]);
88 }
89
90 free(buf);
91
92 (void)unlink(path);
93 }
94
ATF_TC_CLEANUP(revoke_basic,tc)95 ATF_TC_CLEANUP(revoke_basic, tc)
96 {
97 (void)unlink(path);
98 }
99
100 ATF_TC(revoke_err);
ATF_TC_HEAD(revoke_err,tc)101 ATF_TC_HEAD(revoke_err, tc)
102 {
103 atf_tc_set_md_var(tc, "descr", "Test errors from revoke(2)");
104 atf_tc_set_md_var(tc, "require.user", "unprivileged");
105 }
106
ATF_TC_BODY(revoke_err,tc)107 ATF_TC_BODY(revoke_err, tc)
108 {
109 char buf[1024 + 1]; /* XXX: From the manual page... */
110
111 (void)memset(buf, 'x', sizeof(buf));
112
113 errno = 0;
114 ATF_REQUIRE_ERRNO(EFAULT, revoke((char *)-1) == -1);
115
116 errno = 0;
117 ATF_REQUIRE_ERRNO(ENAMETOOLONG, revoke(buf) == -1);
118
119 #ifdef __FreeBSD__
120 atf_tc_skip("revoke(2) is only implemented for devfs(4).");
121 #endif
122 errno = 0;
123 ATF_REQUIRE_ERRNO(EPERM, revoke("/etc/passwd") == -1);
124
125 errno = 0;
126 ATF_REQUIRE_ERRNO(ENOENT, revoke("/etc/xxx/yyy") == -1);
127 }
128
129 ATF_TC_WITH_CLEANUP(revoke_perm);
ATF_TC_HEAD(revoke_perm,tc)130 ATF_TC_HEAD(revoke_perm, tc)
131 {
132 atf_tc_set_md_var(tc, "descr", "Test permissions revoke(2)");
133 atf_tc_set_md_var(tc, "require.user", "root");
134 }
135
ATF_TC_BODY(revoke_perm,tc)136 ATF_TC_BODY(revoke_perm, tc)
137 {
138 struct passwd *pw;
139 int fd, sta;
140 pid_t pid;
141
142 #ifdef __FreeBSD__
143 atf_tc_skip("revoke(2) is only implemented for devfs(4).");
144 #endif
145 pw = getpwnam("nobody");
146 fd = open(path, O_RDWR | O_CREAT, 0600);
147
148 ATF_REQUIRE(fd >= 0);
149 ATF_REQUIRE(pw != NULL);
150 ATF_REQUIRE(revoke(path) == 0);
151
152 pid = fork();
153 ATF_REQUIRE(pid >= 0);
154
155 if (pid == 0) {
156
157 if (setuid(pw->pw_uid) != 0)
158 _exit(EXIT_FAILURE);
159
160 errno = 0;
161
162 if (revoke(path) == 0)
163 _exit(EXIT_FAILURE);
164
165 if (errno != EACCES)
166 _exit(EXIT_FAILURE);
167
168 if (close(fd) != 0)
169 _exit(EXIT_FAILURE);
170
171 _exit(EXIT_SUCCESS);
172 }
173
174 (void)wait(&sta);
175
176 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
177 atf_tc_fail("revoke(2) did not obey permissions");
178
179 (void)close(fd);
180 ATF_REQUIRE(unlink(path) == 0);
181 }
182
ATF_TC_CLEANUP(revoke_perm,tc)183 ATF_TC_CLEANUP(revoke_perm, tc)
184 {
185 (void)unlink(path);
186 }
187
ATF_TP_ADD_TCS(tp)188 ATF_TP_ADD_TCS(tp)
189 {
190
191 ATF_TP_ADD_TC(tp, revoke_basic);
192 ATF_TP_ADD_TC(tp, revoke_err);
193 ATF_TP_ADD_TC(tp, revoke_perm);
194
195 return atf_no_error();
196 }
197