1 /*
2 **
3 ** Copyright 2008, 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 <fcntl.h>
19 #include <sys/prctl.h>
20 #include <sys/wait.h>
21 #include <binder/IPCThreadState.h>
22 #include <binder/ProcessState.h>
23 #include <binder/IServiceManager.h>
24
25 #include <string>
26
27 #include <android-base/logging.h>
28 #include <android-base/properties.h>
29 #include <utils/misc.h>
30
31 // from LOCAL_C_INCLUDES
32 #include "MediaExtractorService.h"
33 #include "MediaUtils.h"
34 #include "minijail.h"
35
36 using namespace android;
37
38 static const char kSystemSeccompPolicyPath[] =
39 "/apex/com.android.media/etc/seccomp_policy/mediaextractor.policy";
40 static const char kVendorSeccompPolicyPath[] =
41 "/vendor/etc/seccomp_policy/mediaextractor.policy";
42
main(int argc __unused,char ** argv)43 int main(int argc __unused, char** argv)
44 {
45 limitProcessMemory(
46 "ro.media.maxmem", /* property that defines limit */
47 SIZE_MAX, /* upper limit in bytes */
48 20 /* upper limit as percentage of physical RAM */);
49
50 signal(SIGPIPE, SIG_IGN);
51
52 //b/62255959: this forces libutis.so to dlopen vendor version of libutils.so
53 //before minijail is on. This is dirty but required since some syscalls such
54 //as pread64 are used by linker but aren't allowed in the minijail. By
55 //calling the function before entering minijail, we can force dlopen.
56 android::report_sysprop_change();
57
58 SetUpMinijail(kSystemSeccompPolicyPath, kVendorSeccompPolicyPath);
59
60 strcpy(argv[0], "media.extractor");
61 sp<ProcessState> proc(ProcessState::self());
62 sp<IServiceManager> sm = defaultServiceManager();
63 MediaExtractorService::instantiate();
64
65 ProcessState::self()->startThreadPool();
66 IPCThreadState::self()->joinThreadPool();
67 }
68