Example of support for packages in APK

termux · Jan 15, 2020 · 810e35c · 810e35c
1 parent 90e6260
commit 810e35c
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Showing 3 changed files with 145 additions and 1 deletion.
diff --git a/app/src/main/java/com/termux/app/TermuxInstaller.java b/app/src/main/java/com/termux/app/TermuxInstaller.java
@@ -158,7 +158,7 @@ public void run() {
         }.start();
     }
 
-    private static void ensureDirectoryExists(File directory) {
+    static void ensureDirectoryExists(File directory) {
         if (!directory.isDirectory() && !directory.mkdirs()) {
             throw new RuntimeException("Unable to create directory: " + directory.getAbsolutePath());
         }

diff --git a/app/src/main/java/com/termux/app/TermuxPackageInstaller.java b/app/src/main/java/com/termux/app/TermuxPackageInstaller.java
@@ -0,0 +1,131 @@
+package com.termux.app;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.os.Process;
+import android.system.Os;
+import android.util.Log;
+
+import com.termux.terminal.EmulatorDebug;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class TermuxPackageInstaller extends BroadcastReceiver {
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        try {
+            String packageName = intent.getData().getSchemeSpecificPart();
+            String action = intent.getAction();
+            PackageManager packageManager = context.getPackageManager();
+
+            if (Intent.ACTION_PACKAGE_ADDED.equals(action)) {
+                ApplicationInfo info = packageManager.getApplicationInfo(packageName, 0);
+                if (Process.myUid() == info.uid) {
+                    installPackage(info);
+                }
+            } else if (Intent.ACTION_PACKAGE_REMOVED.equals(action)) {
+                if (Process.myUid() == intent.getIntExtra(Intent.EXTRA_UID, -1)) {
+                    uninstallPackage(packageName);
+                }
+
+            }
+        } catch (Exception e) {
+            Log.e("termux", "Error in package management: " + e);
+        }
+    }
+
+    private static void installPackage(ApplicationInfo info) throws Exception {
+        File filesMappingFile = new File(info.nativeLibraryDir, "files.so");
+        if (!filesMappingFile.exists()) {
+            Log.e("termux", "No file mapping at " + filesMappingFile.getAbsolutePath());
+            return;
+        }
+
+        Log.e("termux", "Installing: " + info.packageName);
+        BufferedReader reader = new BufferedReader(new FileReader(filesMappingFile));
+        String line;
+        while ((line = reader.readLine()) != null) {
+            String[] parts = line.split("←");
+            if (parts.length != 2) {
+                Log.e(EmulatorDebug.LOG_TAG, "Malformed line " + line + " in " + filesMappingFile.getAbsolutePath());
+                continue;
+            }
+
+            String oldPath = info.nativeLibraryDir + "/" + parts[0];
+            String newPath = TermuxService.PREFIX_PATH + "/" + parts[1];
+
+            TermuxInstaller.ensureDirectoryExists(new File(newPath).getParentFile());
+
+            Log.e(EmulatorDebug.LOG_TAG, "About to setup link: " + oldPath + " ← " + newPath);
+            new File(newPath).delete();
+            Os.symlink(oldPath, newPath);
+        }
+
+        File symlinksFile = new File(info.nativeLibraryDir, "symlinks.so");
+        if (!symlinksFile.exists()) {
+            Log.e("termux", "No symlinks mapping at " + symlinksFile.getAbsolutePath());
+        }
+
+        reader = new BufferedReader(new FileReader(symlinksFile));
+        while ((line = reader.readLine()) != null) {
+            String[] parts = line.split("←");
+            if (parts.length != 2) {
+                Log.e(EmulatorDebug.LOG_TAG, "Malformed line " + line + " in " + symlinksFile.getAbsolutePath());
+                continue;
+            }
+
+            String oldPath = parts[0];
+            String newPath = TermuxService.PREFIX_PATH + "/" + parts[1];
+
+            TermuxInstaller.ensureDirectoryExists(new File(newPath).getParentFile());
+
+            Log.e(EmulatorDebug.LOG_TAG, "About to setup link: " + oldPath + " ← " + newPath);
+            new File(newPath).delete();
+            Os.symlink(oldPath, newPath);
+        }
+    }
+
+    private static void uninstallPackage(String packageName) throws IOException {
+        Log.e("termux", "Uninstalling: " + packageName);
+        // We're currently visiting the whole $PREFIX.
+        // If we store installed symlinks in installPackage() we could just visit those,
+        // at the cost of increased complexity and risk for errors.
+        File prefixDir = new File(TermuxService.PREFIX_PATH);
+        removeBrokenSymlinks(prefixDir);
+    }
+
+    private static void removeBrokenSymlinks(File parentDir) throws IOException {
+        for (File child : parentDir.listFiles()) {
+            if (!child.exists()) {
+                Log.e("termux", "Removing broken symlink: " + child.getAbsolutePath());
+                child.delete();
+            } else if (child.isDirectory()) {
+                removeBrokenSymlinks(child);
+            }
+        }
+    }
+
+    public static void setupAllInstalledPackages(Context context) {
+        try {
+            removeBrokenSymlinks(new File(TermuxService.PREFIX_PATH));
+
+            PackageManager packageManager = context.getPackageManager();
+            for (PackageInfo info : packageManager.getInstalledPackages(0)) {
+                if (info.sharedUserId != null && info.sharedUserId.equals("com.termux")) {
+                    installPackage(info.applicationInfo);
+                }
+            }
+        } catch (Exception e) {
+            Log.e("termux", "Error setting up all packages", e);
+        }
+
+    }
+}
diff --git a/app/src/main/java/com/termux/app/TermuxService.java b/app/src/main/java/com/termux/app/TermuxService.java
@@ -9,6 +9,7 @@
 import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
+import android.content.IntentFilter;
 import android.content.res.Resources;
 import android.net.Uri;
 import android.net.wifi.WifiManager;
@@ -94,6 +95,8 @@ class LocalBinder extends Binder {
     /** If the user has executed the {@link #ACTION_STOP_SERVICE} intent. */
     boolean mWantsToStop = false;
 
+    private final TermuxPackageInstaller packageInstaller = new TermuxPackageInstaller();
+
     @SuppressLint("Wakelock")
     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
@@ -185,8 +188,16 @@ public IBinder onBind(Intent intent) {
 
     @Override
     public void onCreate() {
+        TermuxPackageInstaller.setupAllInstalledPackages(this);
         setupNotificationChannel();
         startForeground(NOTIFICATION_ID, buildNotification());
+
+        IntentFilter addedFilter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
+        addedFilter.addDataScheme("package");
+        IntentFilter removedFilter = new IntentFilter(Intent.ACTION_PACKAGE_REMOVED);
+        removedFilter.addDataScheme("package");
+        this.registerReceiver(packageInstaller, addedFilter);
+        this.registerReceiver(packageInstaller, removedFilter);
     }
 
     /** Update the shown foreground service notification after making any changes that affect it. */
@@ -254,6 +265,8 @@ private Notification buildNotification() {
 
     @Override
     public void onDestroy() {
+        unregisterReceiver(packageInstaller);
+
         File termuxTmpDir = new File(TermuxService.PREFIX_PATH + "/tmp");
 
         if (termuxTmpDir.exists()) {