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1 | /** |
2 | * Seccomp Library test program | |
3 | * | |
4 | * Copyright (c) 2013 Red Hat <pmoore@redhat.com> | |
5 | * Author: Paul Moore <paul@paul-moore.com> | |
6 | */ | |
7 | ||
8 | /* | |
9 | * This library is free software; you can redistribute it and/or modify it | |
10 | * under the terms of version 2.1 of the GNU Lesser General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public License | |
19 | * along with this library; if not, see <http://www.gnu.org/licenses>. | |
20 | */ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <fcntl.h> | |
24 | #include <string.h> | |
25 | #include <unistd.h> | |
26 | #include <sys/types.h> | |
27 | #include <sys/stat.h> | |
28 | ||
29 | #include <seccomp.h> | |
30 | ||
31 | #include "util.h" | |
32 | ||
33 | int main(int argc, char *argv[]) | |
34 | { | |
35 | int rc; | |
36 | int fd; | |
37 | scmp_filter_ctx ctx = NULL; | |
38 | const char buf[] = "testing"; | |
39 | ssize_t buf_len = strlen(buf); | |
40 | ||
41 | rc = util_action_parse(argv[1]); | |
42 | if (rc != SCMP_ACT_ALLOW) { | |
43 | rc = 1; | |
44 | goto out; | |
45 | } | |
46 | ||
47 | rc = util_trap_install(); | |
48 | if (rc != 0) | |
49 | goto out; | |
50 | ||
51 | fd = open("/dev/null", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR); | |
52 | if (fd < 0) { | |
53 | rc = errno; | |
54 | goto out; | |
55 | } | |
56 | ||
57 | ctx = seccomp_init(SCMP_ACT_TRAP); | |
58 | if (ctx == NULL) | |
59 | return ENOMEM; | |
60 | ||
61 | rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(write), 1, | |
62 | SCMP_A0(SCMP_CMP_EQ, fd)); | |
63 | if (rc != 0) | |
64 | goto out; | |
65 | rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(close), 0); | |
66 | if (rc != 0) | |
67 | goto out; | |
68 | rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(rt_sigreturn), 0); | |
69 | if (rc != 0) | |
70 | goto out; | |
71 | rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(exit_group), 0); | |
72 | if (rc != 0) | |
73 | goto out; | |
74 | ||
75 | rc = seccomp_load(ctx); | |
76 | if (rc != 0) | |
77 | goto out; | |
78 | ||
79 | if (write(fd, buf, buf_len) < buf_len) { | |
80 | rc = errno; | |
81 | goto out; | |
82 | } | |
83 | if (close(fd) < 0) { | |
84 | rc = errno; | |
85 | goto out; | |
86 | } | |
87 | ||
88 | rc = 160; | |
89 | ||
90 | out: | |
91 | seccomp_release(ctx); | |
92 | return (rc < 0 ? -rc : rc); | |
93 | } |