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/types.h>
30 #include <sys/capsicum.h>
31 #include <sys/procdesc.h>
32 #include <sys/wait.h>
33
34 #include <err.h>
35 #include <errno.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <unistd.h>
39
40 #include "misc.h"
41
42 int
main(void)43 main(void)
44 {
45 unsigned int mode;
46 pid_t pid;
47 int pfd;
48
49 printf("1..27\n");
50
51 mode = 666;
52 CHECK(cap_getmode(&mode) == 0);
53 /* If cap_getmode() succeeded mode should be modified. */
54 CHECK(mode != 666);
55 /* We are not in capability mode. */
56 CHECK(mode == 0);
57
58 /* Expect EFAULT. */
59 errno = 0;
60 CHECK(cap_getmode(NULL) == -1);
61 CHECK(errno == EFAULT);
62 errno = 0;
63 CHECK(cap_getmode((void *)(uintptr_t)0xdeadc0de) == -1);
64 CHECK(errno == EFAULT);
65
66 /* If parent is not in capability mode, child after fork() also won't be. */
67 pid = fork();
68 switch (pid) {
69 case -1:
70 err(1, "fork() failed");
71 case 0:
72 mode = 666;
73 CHECK(cap_getmode(&mode) == 0);
74 /* If cap_getmode() succeeded mode should be modified. */
75 CHECK(mode != 666);
76 /* We are not in capability mode. */
77 CHECK(mode == 0);
78 exit(0);
79 default:
80 if (waitpid(pid, NULL, 0) == -1)
81 err(1, "waitpid() failed");
82 }
83
84 /* If parent is not in capability mode, child after pdfork() also won't be. */
85 pid = pdfork(&pfd, 0);
86 switch (pid) {
87 case -1:
88 err(1, "pdfork() failed");
89 case 0:
90 mode = 666;
91 CHECK(cap_getmode(&mode) == 0);
92 /* If cap_getmode() succeeded mode should be modified. */
93 CHECK(mode != 666);
94 /* We are not in capability mode. */
95 CHECK(mode == 0);
96 exit(0);
97 default:
98 if (pdwait(pfd) == -1)
99 err(1, "pdwait() failed");
100 close(pfd);
101 }
102
103 /* In capability mode... */
104
105 CHECK(cap_enter() == 0);
106
107 mode = 666;
108 CHECK(cap_getmode(&mode) == 0);
109 /* If cap_getmode() succeeded mode should be modified. */
110 CHECK(mode != 666);
111 /* We are in capability mode. */
112 CHECK(mode == 1);
113
114 /* Expect EFAULT. */
115 errno = 0;
116 CHECK(cap_getmode(NULL) == -1);
117 CHECK(errno == EFAULT);
118 errno = 0;
119 CHECK(cap_getmode((void *)(uintptr_t)0xdeadc0de) == -1);
120 CHECK(errno == EFAULT);
121
122 /* If parent is in capability mode, child after fork() also will be. */
123 pid = fork();
124 switch (pid) {
125 case -1:
126 err(1, "fork() failed");
127 case 0:
128 mode = 666;
129 CHECK(cap_getmode(&mode) == 0);
130 /* If cap_getmode() succeeded mode should be modified. */
131 CHECK(mode != 666);
132 /* We are in capability mode. */
133 CHECK(mode == 1);
134 exit(0);
135 default:
136 /*
137 * wait(2) and friends are not permitted in the capability mode,
138 * so we can only just wait for a while.
139 */
140 sleep(1);
141 }
142
143 /* If parent is in capability mode, child after pdfork() also will be. */
144 pid = pdfork(&pfd, 0);
145 switch (pid) {
146 case -1:
147 err(1, "pdfork() failed");
148 case 0:
149 mode = 666;
150 CHECK(cap_getmode(&mode) == 0);
151 /* If cap_getmode() succeeded mode should be modified. */
152 CHECK(mode != 666);
153 /* We are in capability mode. */
154 CHECK(mode == 1);
155 exit(0);
156 default:
157 if (pdwait(pfd) == -1)
158 err(1, "pdwait() failed");
159 close(pfd);
160 }
161
162 exit(0);
163 }
164