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1 | /** |
2 | * Seccomp Library test program | |
3 | * | |
4 | * Author: Paul Moore <paul@paul-moore.com>, Vitaly Shukela <vi0oss@gmail.com> | |
5 | */ | |
6 | ||
7 | /* | |
8 | * This library is free software; you can redistribute it and/or modify it | |
9 | * under the terms of version 2.1 of the GNU Lesser General Public License as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
13 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
15 | * for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, see <http://www.gnu.org/licenses>. | |
19 | */ | |
20 | ||
21 | #include <errno.h> | |
22 | #include <unistd.h> | |
23 | ||
24 | #include <seccomp.h> | |
25 | ||
26 | #include "util.h" | |
27 | ||
28 | int main(int argc, char *argv[]) | |
29 | { | |
30 | int rc; | |
31 | struct util_options opts; | |
32 | scmp_filter_ctx ctx = NULL; | |
33 | struct scmp_arg_cmp arg_cmp; | |
34 | ||
35 | rc = util_getopt(argc, argv, &opts); | |
36 | if (rc < 0) | |
37 | goto out; | |
38 | ||
39 | ctx = seccomp_init(SCMP_ACT_KILL); | |
40 | if (ctx == NULL) | |
41 | return ENOMEM; | |
42 | ||
43 | arg_cmp = SCMP_A0(SCMP_CMP_EQ, STDIN_FILENO); | |
44 | rc = seccomp_rule_add_exact_array(ctx, SCMP_ACT_ALLOW, | |
45 | SCMP_SYS(read), 1, &arg_cmp); | |
46 | if (rc != 0) | |
47 | goto out; | |
48 | ||
49 | arg_cmp = SCMP_A0(SCMP_CMP_EQ, STDOUT_FILENO); | |
50 | rc = seccomp_rule_add_exact_array(ctx, SCMP_ACT_ALLOW, | |
51 | SCMP_SYS(write), 1, &arg_cmp); | |
52 | if (rc != 0) | |
53 | goto out; | |
54 | ||
55 | arg_cmp = SCMP_A0(SCMP_CMP_EQ, STDERR_FILENO); | |
56 | rc = seccomp_rule_add_exact_array(ctx, SCMP_ACT_ALLOW, | |
57 | SCMP_SYS(write), 1, &arg_cmp); | |
58 | if (rc != 0) | |
59 | goto out; | |
60 | ||
61 | rc = seccomp_rule_add_exact_array(ctx, SCMP_ACT_ALLOW, | |
62 | SCMP_SYS(close), 0, NULL); | |
63 | if (rc != 0) | |
64 | goto out; | |
65 | ||
66 | rc = seccomp_rule_add_exact_array(ctx, SCMP_ACT_ALLOW, | |
67 | SCMP_SYS(rt_sigreturn), 0, NULL); | |
68 | if (rc != 0) | |
69 | goto out; | |
70 | ||
71 | rc = util_filter_output(&opts, ctx); | |
72 | if (rc) | |
73 | goto out; | |
74 | ||
75 | out: | |
76 | seccomp_release(ctx); | |
77 | return (rc < 0 ? -rc : rc); | |
78 | } |