1 /*-
2 * Copyright (c) 2012 The FreeBSD Foundation
3 *
4 * This software was developed by Pawel Jakub Dawidek under sponsorship from
5 * the FreeBSD Foundation.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #include <sys/types.h>
31 #include <sys/capsicum.h>
32 #include <sys/procdesc.h>
33 #include <sys/wait.h>
34
35 #include <err.h>
36 #include <errno.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <unistd.h>
40
41 #include "misc.h"
42
43 int
main(void)44 main(void)
45 {
46 unsigned int mode;
47 pid_t pid;
48 int pfd;
49
50 printf("1..27\n");
51
52 mode = 666;
53 CHECK(cap_getmode(&mode) == 0);
54 /* If cap_getmode() succeeded mode should be modified. */
55 CHECK(mode != 666);
56 /* We are not in capability mode. */
57 CHECK(mode == 0);
58
59 /* Expect EFAULT. */
60 errno = 0;
61 CHECK(cap_getmode(NULL) == -1);
62 CHECK(errno == EFAULT);
63 errno = 0;
64 CHECK(cap_getmode((void *)(uintptr_t)0xdeadc0de) == -1);
65 CHECK(errno == EFAULT);
66
67 /* If parent is not in capability mode, child after fork() also won't be. */
68 pid = fork();
69 switch (pid) {
70 case -1:
71 err(1, "fork() failed");
72 case 0:
73 mode = 666;
74 CHECK(cap_getmode(&mode) == 0);
75 /* If cap_getmode() succeeded mode should be modified. */
76 CHECK(mode != 666);
77 /* We are not in capability mode. */
78 CHECK(mode == 0);
79 exit(0);
80 default:
81 if (waitpid(pid, NULL, 0) == -1)
82 err(1, "waitpid() failed");
83 }
84
85 /* If parent is not in capability mode, child after pdfork() also won't be. */
86 pid = pdfork(&pfd, 0);
87 switch (pid) {
88 case -1:
89 err(1, "pdfork() failed");
90 case 0:
91 mode = 666;
92 CHECK(cap_getmode(&mode) == 0);
93 /* If cap_getmode() succeeded mode should be modified. */
94 CHECK(mode != 666);
95 /* We are not in capability mode. */
96 CHECK(mode == 0);
97 exit(0);
98 default:
99 if (pdwait(pfd) == -1)
100 err(1, "pdwait() failed");
101 close(pfd);
102 }
103
104 /* In capability mode... */
105
106 CHECK(cap_enter() == 0);
107
108 mode = 666;
109 CHECK(cap_getmode(&mode) == 0);
110 /* If cap_getmode() succeeded mode should be modified. */
111 CHECK(mode != 666);
112 /* We are in capability mode. */
113 CHECK(mode == 1);
114
115 /* Expect EFAULT. */
116 errno = 0;
117 CHECK(cap_getmode(NULL) == -1);
118 CHECK(errno == EFAULT);
119 errno = 0;
120 CHECK(cap_getmode((void *)(uintptr_t)0xdeadc0de) == -1);
121 CHECK(errno == EFAULT);
122
123 /* If parent is in capability mode, child after fork() also will be. */
124 pid = fork();
125 switch (pid) {
126 case -1:
127 err(1, "fork() failed");
128 case 0:
129 mode = 666;
130 CHECK(cap_getmode(&mode) == 0);
131 /* If cap_getmode() succeeded mode should be modified. */
132 CHECK(mode != 666);
133 /* We are in capability mode. */
134 CHECK(mode == 1);
135 exit(0);
136 default:
137 /*
138 * wait(2) and friends are not permitted in the capability mode,
139 * so we can only just wait for a while.
140 */
141 sleep(1);
142 }
143
144 /* If parent is in capability mode, child after pdfork() also will be. */
145 pid = pdfork(&pfd, 0);
146 switch (pid) {
147 case -1:
148 err(1, "pdfork() failed");
149 case 0:
150 mode = 666;
151 CHECK(cap_getmode(&mode) == 0);
152 /* If cap_getmode() succeeded mode should be modified. */
153 CHECK(mode != 666);
154 /* We are in capability mode. */
155 CHECK(mode == 1);
156 exit(0);
157 default:
158 if (pdwait(pfd) == -1)
159 err(1, "pdwait() failed");
160 close(pfd);
161 }
162
163 exit(0);
164 }
165