1 /*
2 **
3 ** Copyright 2016, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 **     http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17 
18 #include <cutils/log.h>
19 #include <libminijail.h>
20 
21 #include "minijail.h"
22 
23 namespace android {
24 
25 /* Must match location in Android.mk */
26 static const char kSeccompFilePath[] = "/system/etc/seccomp_policy/mediacodec-seccomp.policy";
27 
MiniJail()28 int MiniJail()
29 {
30     /* no seccomp policy for this architecture */
31     if (access(kSeccompFilePath, R_OK) == -1) {
32         ALOGW("No seccomp filter defined for this architecture.");
33         return 0;
34     }
35 
36     struct minijail *jail = minijail_new();
37     if (jail == NULL) {
38         ALOGW("Failed to create minijail.");
39         return -1;
40     }
41 
42     minijail_no_new_privs(jail);
43     minijail_log_seccomp_filter_failures(jail);
44     minijail_use_seccomp_filter(jail);
45     minijail_parse_seccomp_filters(jail, kSeccompFilePath);
46     minijail_enter(jail);
47     minijail_destroy(jail);
48     return 0;
49 }
50 }
51