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https://github.com/flyskywhy/app_watchdogd
An app_watchdogd.sh to keep an eye on app with rooted Android and restart it if it crashes
https://github.com/flyskywhy/app_watchdogd
activity android app app-watchdogd crashed killed mainactivity oom oom-adj react-native react-native-android-shell relaunch restart root shell supersu watchdogd
Last synced: about 13 hours ago
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An app_watchdogd.sh to keep an eye on app with rooted Android and restart it if it crashes
- Host: GitHub
- URL: https://github.com/flyskywhy/app_watchdogd
- Owner: flyskywhy
- Created: 2022-06-07T06:25:43.000Z (over 2 years ago)
- Default Branch: master
- Last Pushed: 2022-06-21T09:05:59.000Z (over 2 years ago)
- Last Synced: 2024-11-11T18:11:33.858Z (2 months ago)
- Topics: activity, android, app, app-watchdogd, crashed, killed, mainactivity, oom, oom-adj, react-native, react-native-android-shell, relaunch, restart, root, shell, supersu, watchdogd
- Language: Shell
- Homepage:
- Size: 2.93 KB
- Stars: 1
- Watchers: 3
- Forks: 3
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# app_watchdogd
`app_watchdogd.sh` is used to automatically relaunch an Android APP which is killed or crashed.
`app_watchdogd.sh` can be run in `/data/data/com.domain.appname/files/` or `/system/xbin/` .
If run `app_watchdogd.sh` without `su -c` , even your device is rooted, `adb shell cat /proc/APP_WATCHDOG_SH_PID/oom_adj` will not be `-17` but `0`, Android system will kill `app_watchdogd.sh` process if not smaller than `0` when memory is low, so you need
su -c /data/data/com.domain.appname/files/app_watchdogd.sh &
and this one line command above is obviously better than
/data/data/com.domain.appname/files/app_watchdogd.sh &
manually find APP_WATCHDOG_SH_PID with `ps | grep /system/bin/sh | grep -c poll_sched)`
su -c echo -12 > /proc/APP_WATCHDOG_SH_PID/oom_adj
su -c chmod -r /proc/APP_WATCHDOG_SH_PID/oom_adj
## Usage
For sure your device
* rooted
* [install-supersu](https://github.com/flyskywhy/install-supersu)
### shell test
* $1 pkg_or_kill: pkg e.g. `com.domain.appname` means enable watchdogd; or just `kill` means disable watchdogd
* $2 activity: e.g. `MainActivity` if pkg; null if kill
* $3 timeout_sec: e.g. `5` if pkg; null if kill
```
adb remount
adb push app_watchdogd.sh system/xbin/
adb shell su -c system/xbin/app_watchdogd.sh com.domain.appname MainActivity 5 &
adb shell su -c system/xbin/app_watchdogd.sh kill
```
### react-native APP
Copy as `android/app/src/main/assets/app_watchdogd.sh` .
`utils.js` :
```
import AndroidShell from '@flyskywhy/react-native-android-shell';
export function enableAppWatchdogd({
shPath = '/system/xbin/app_watchdogd.sh',
pkg,
activity = 'MainActivity',
timeoutSec = 5,
}) {
AndroidShell.executeCommand(
'su -c ' + shPath + ' ' + pkg + ' ' + activity + ' ' + timeoutSec + ' &',
() => {},
);
}
export function disableAppWatchdogd({
shPath = '/system/xbin/app_watchdogd.sh',
callback = () => {},
}) {
AndroidShell.executeCommand('su -c ' + shPath + ' kill', callback);
}
```
`Navigation.js` :
```
if (Platform.OS !== 'web') {
var RNFS = require('react-native-fs');
}
import AndroidShell from '@flyskywhy/react-native-android-shell';
import RNExitApp from 'react-native-exit-app';
import * as utils from '../utils';
const shPath = `${RNFS.DocumentDirectoryPath}/app_watchdogd.sh`;
class Navigation extends Component {
...
componentDidMount() {
this.enableAppWatchdogd();
}
enableAppWatchdogd = async () => {
if (Platform.OS === 'android') {
if (!(await RNFS.exists(shPath))) {
await RNFS.copyFileAssets('app_watchdogd.sh', shPath); // /data/data/com.domain.appname/files/app_watchdogd.sh
}
AndroidShell.executeCommand(
'su -c dumpsys window | grep mCurrentFocus',
(activity) => {
let a = activity
.replace(/\n/, '')
.replace(/^.* .* /, '')
.replace('}', ''); // com.domain.appname/com.domain.appname.MainActivity
let pkg = a.replace(/\/.*/, ''); // com.domain.appname
utils.enableAppWatchdogd({ // if APP exit abnormally (killed or crashed), will be relaunched
shPath,
pkg,
});
},
);
// above have a small bug: after adb install then first launch, pkg could be `com.android.systemui` (from mCurrentFocus)
// below works well if you can `import {applicationId} from 'expo-application'`
// utils.enableAppWatchdogd({ // if APP exit abnormally (killed or crashed), will be relaunched
// shPath,
// pkg: applicationId,
// });
}
};
onBackPress = async () => {
if (USER_PRESS_ANDROID_BACK_KEY_TWICE) {
if (Platform.OS === 'android') {
utils.disableAppWatchdogd({ // if APP exit normally (by user), will disable watchdogd
shPath,
callback: RNExitApp.exitApp,
});
} else {
RNExitApp.exitApp();
}
}
};
...
}
```
### pure Android APP
Copy as `android/app/src/main/assets/app_watchdogd.sh` when building, save as `/data/data/com.domain.appname/files/app_watchdogd.sh` when running, then `su -c /data/data/com.domain.appname/files/app_watchdogd.sh &` from Java.