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Android: Clean up old symlinks before creating new ones (#11931)

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Braden Farmer 2021-01-23 11:49:32 -07:00 committed by GitHub
parent 0068dfd963
commit 6167f8c980
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1 changed files with 21 additions and 15 deletions
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36
pkg/android/phoenix-common/src/com/retroarch/browser/retroactivity/RetroActivityCommon.java
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@ -33,8 +33,6 @@ import android.os.VibrationEffect;
import android.util.Log;
import java.io.File;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
@ -100,6 +98,7 @@ public class RetroActivityCommon extends NativeActivity
@Override
protected void onCreate(Bundle savedInstanceState) {
cleanupSymlinks();
updateSymlinks();
SplitInstallManager manager = SplitInstallManagerFactory.create(this);
@ -543,6 +542,23 @@ public class RetroActivityCommon extends NativeActivity
return path;
}
/**
* Cleans up existing symlinks before new ones are created.
*/
private void cleanupSymlinks() {
if(Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) return;
File[] files = new File(getCorePath()).listFiles();
for(int i = 0; i < files.length; i++) {
try {
Os.readlink(files[i].getAbsolutePath());
files[i].delete();
} catch (Exception e) {
// File is not a symlink, so don't delete.
}
}
}
/**
* Triggers a symlink update in the known places that Dynamic Feature Modules
* are installed to.
@ -570,6 +586,8 @@ public class RetroActivityCommon extends NativeActivity
* @param filenames List of filenames to update.
*/
private void traverseFilesystem(File file) {
if(Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) return;
File[] list = file.listFiles();
if(list == null) return;
@ -593,19 +611,7 @@ public class RetroActivityCommon extends NativeActivity
new File(newFilename).delete();
try {
// On Android 5.0+, use the official API for creating a symlink.
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
Os.symlink(filename, newFilename);
} else {
// On older versions, resort to using reflection instead.
Class<?> clazz = Class.forName("libcore.io.Libcore");
Field field = clazz.getDeclaredField("os");
field.setAccessible(true);
Object os = field.get(null);
Method method = os.getClass().getMethod("symlink", String.class, String.class);
method.invoke(os, filename, newFilename);
}
Os.symlink(filename, newFilename);
} catch (Exception e) {
// Symlink failed to be created. Should never happen.
}