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Commit a980e140 authored by Patrick Baumann's avatar Patrick Baumann
Browse files

pm shell command to uninstall system updates 

This change introduces a new package manager shell command that
will automatically uninstall any updated system apps, falling back
to the version that is prebaked into the system image.

Change-Id: Ic2952394baadeea6286e0a87343201e564ffdfb9
Fixes: 21088599
Test: manual - run before SUW and after; see updates uninstalled
parent 40ce0958

services/core/java/com/android/server/pm/PackageManagerShellCommand.java

+49 −6
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ import android.content.IntentSender; 
import android.content.pm.ApplicationInfo;

import android.content.pm.FeatureInfo;

import android.content.pm.IPackageDataObserver;

import android.content.pm.IPackageInstaller;

import android.content.pm.IPackageManager;

import android.content.pm.InstrumentationInfo;

import android.content.pm.PackageInfo;
@@ -89,12 +90,7 @@ import java.io.FileDescriptor; 
import java.io.IOException;

import java.io.PrintWriter;

import java.net.URISyntaxException;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

import java.util.Map;

import java.util.WeakHashMap;

import java.util.*;

import java.util.concurrent.SynchronousQueue;

import java.util.concurrent.TimeUnit;
@@ -235,6 +231,8 @@ class PackageManagerShellCommand extends ShellCommand { 
                    return runSetHarmfulAppWarning();

                case "get-harmful-app-warning":

                    return runGetHarmfulAppWarning();

                case "uninstall-system-updates":

                    return uninstallSystemUpdates();

                default: {

                    String nextArg = getNextArg();

                    if (nextArg == null) {
@@ -257,6 +255,47 @@ class PackageManagerShellCommand extends ShellCommand { 
        return -1;

    }



    private int uninstallSystemUpdates() {

        final PrintWriter pw = getOutPrintWriter();

        List<String> failedUninstalls = new LinkedList<>();

        try {

            final ParceledListSlice<ApplicationInfo> packages =

                    mInterface.getInstalledApplications(

                            PackageManager.MATCH_SYSTEM_ONLY, UserHandle.USER_SYSTEM);

            final IPackageInstaller installer = mInterface.getPackageInstaller();

            List<ApplicationInfo> list = packages.getList();

            for (ApplicationInfo info : list) {

                if (info.isUpdatedSystemApp()) {

                    pw.println("Uninstalling updates to " + info.packageName + "...");

                    final LocalIntentReceiver receiver = new LocalIntentReceiver();

                    installer.uninstall(new VersionedPackage(info.packageName,

                                    info.versionCode), null /*callerPackageName*/, 0 /* flags */,

                            receiver.getIntentSender(), 0);



                    final Intent result = receiver.getResult();

                    final int status = result.getIntExtra(PackageInstaller.EXTRA_STATUS,

                            PackageInstaller.STATUS_FAILURE);

                    if (status != PackageInstaller.STATUS_SUCCESS) {

                        failedUninstalls.add(info.packageName);

                    }

                }

            }

        } catch (RemoteException e) {

            pw.println("Failure ["

                    + e.getClass().getName() + " - "

                    + e.getMessage() + "]");

            return 0;

        }

        if (!failedUninstalls.isEmpty()) {

            pw.println("Failure [Couldn't uninstall packages: "

                    + TextUtils.join(", ", failedUninstalls)

                    + "]");

            return 0;

        }

        pw.println("Success");

        return 1;

    }



    private void setParamsSize(InstallParams params, String inPath) {

        if (params.sessionParams.sizeBytes == -1 && !STDIN_PATH.equals(inPath)) {

            final ParcelFileDescriptor fd = openFileForSystem(inPath, "r");
@@ -2705,6 +2744,10 @@ class PackageManagerShellCommand extends ShellCommand { 
        pw.println("  get-harmful-app-warning [--user <USER_ID>] <PACKAGE>");

        pw.println("    Return the harmful app warning message for the given app, if present");

        pw.println();

        pw.println("  uninstall-system-updates");

        pw.println("    Remove updates to all system applications and fall back to their /system " +

                "version.");

        pw.println();

        Intent.printIntentArgsHelp(pw , "");

    }