Adding shell commands for modifying content.
1. Added methods to the ActivityManagerService remote interface
that allow accessing content providers outside of an application.
These methods are guarded by an internal signature protected
permission which is given to the shell user. This enables a
shell program to access content providers.
2. Implemented a shell command that takes as input as standart
fagls with values and manipulates content via the content provider
mechanism.
Change-Id: I2943f8b59fbab33eb623458fa01ea61a077b9845
diff --git a/services/java/com/android/server/am/ContentProviderRecord.java b/services/java/com/android/server/am/ContentProviderRecord.java
index 3835553..f338cfc 100644
--- a/services/java/com/android/server/am/ContentProviderRecord.java
+++ b/services/java/com/android/server/am/ContentProviderRecord.java
@@ -20,24 +20,35 @@
import android.content.ComponentName;
import android.content.pm.ApplicationInfo;
import android.content.pm.ProviderInfo;
+import android.os.IBinder;
+import android.os.IBinder.DeathRecipient;
import android.os.Process;
+import android.os.RemoteException;
+import android.util.Slog;
import java.io.PrintWriter;
+import java.util.HashMap;
import java.util.HashSet;
class ContentProviderRecord extends ContentProviderHolder {
// All attached clients
final HashSet<ProcessRecord> clients = new HashSet<ProcessRecord>();
+ // Handles for non-framework processes supported by this provider
+ HashMap<IBinder, ExternalProcessHandle> externalProcessTokenToHandle;
+ // Count for external process for which we have no handles.
+ int externalProcessNoHandleCount;
+ final ActivityManagerService service;
final int uid;
final ApplicationInfo appInfo;
final ComponentName name;
- int externals; // number of non-framework processes supported by this provider
ProcessRecord proc; // if non-null, hosting process.
ProcessRecord launchingApp; // if non-null, waiting for this app to be launched.
String stringName;
-
- public ContentProviderRecord(ProviderInfo _info, ApplicationInfo ai, ComponentName _name) {
+
+ public ContentProviderRecord(ActivityManagerService _service, ProviderInfo _info,
+ ApplicationInfo ai, ComponentName _name) {
super(_info);
+ service = _service;
uid = ai.uid;
appInfo = ai;
name = _name;
@@ -50,6 +61,7 @@
appInfo = cpr.appInfo;
name = cpr.name;
noReleaseNeeded = cpr.noReleaseNeeded;
+ service = cpr.service;
}
public boolean canRunHere(ProcessRecord app) {
@@ -57,6 +69,57 @@
&& (uid == Process.SYSTEM_UID || uid == app.info.uid);
}
+ public void addExternalProcessHandleLocked(IBinder token) {
+ if (token == null) {
+ externalProcessNoHandleCount++;
+ } else {
+ if (externalProcessTokenToHandle == null) {
+ externalProcessTokenToHandle = new HashMap<IBinder, ExternalProcessHandle>();
+ }
+ ExternalProcessHandle handle = externalProcessTokenToHandle.get(token);
+ if (handle == null) {
+ handle = new ExternalProcessHandle(token);
+ externalProcessTokenToHandle.put(token, handle);
+ }
+ handle.mAcquisitionCount++;
+ }
+ }
+
+ public boolean removeExternalProcessHandleLocked(IBinder token) {
+ if (hasExternalProcessHandles()) {
+ boolean hasHandle = false;
+ if (externalProcessTokenToHandle != null) {
+ ExternalProcessHandle handle = externalProcessTokenToHandle.get(token);
+ if (handle != null) {
+ hasHandle = true;
+ handle.mAcquisitionCount--;
+ if (handle.mAcquisitionCount == 0) {
+ removeExternalProcessHandleInternalLocked(token);
+ return true;
+ }
+ }
+ }
+ if (!hasHandle) {
+ externalProcessNoHandleCount--;
+ return true;
+ }
+ }
+ return false;
+ }
+
+ private void removeExternalProcessHandleInternalLocked(IBinder token) {
+ ExternalProcessHandle handle = externalProcessTokenToHandle.get(token);
+ handle.unlinkFromOwnDeathLocked();
+ externalProcessTokenToHandle.remove(token);
+ if (externalProcessTokenToHandle.size() == 0) {
+ externalProcessTokenToHandle = null;
+ }
+ }
+
+ public boolean hasExternalProcessHandles() {
+ return (externalProcessTokenToHandle != null || externalProcessNoHandleCount > 0);
+ }
+
void dump(PrintWriter pw, String prefix) {
pw.print(prefix); pw.print("package=");
pw.print(info.applicationInfo.packageName);
@@ -73,8 +136,9 @@
pw.print("multiprocess="); pw.print(info.multiprocess);
pw.print(" initOrder="); pw.println(info.initOrder);
}
- if (externals != 0) {
- pw.print(prefix); pw.print("externals="); pw.println(externals);
+ if (hasExternalProcessHandles()) {
+ pw.print(prefix); pw.print("externals=");
+ pw.println(externalProcessTokenToHandle.size());
}
if (clients.size() > 0) {
pw.print(prefix); pw.println("Clients:");
@@ -84,6 +148,7 @@
}
}
+ @Override
public String toString() {
if (stringName != null) {
return stringName;
@@ -96,4 +161,35 @@
sb.append('}');
return stringName = sb.toString();
}
+
+ // This class represents a handle from an external process to a provider.
+ private class ExternalProcessHandle implements DeathRecipient {
+ private static final String LOG_TAG = "ExternalProcessHanldle";
+
+ private final IBinder mToken;
+ private int mAcquisitionCount;
+
+ public ExternalProcessHandle(IBinder token) {
+ mToken = token;
+ try {
+ token.linkToDeath(this, 0);
+ } catch (RemoteException re) {
+ Slog.e(LOG_TAG, "Couldn't register for death for token: " + mToken, re);
+ }
+ }
+
+ public void unlinkFromOwnDeathLocked() {
+ mToken.unlinkToDeath(this, 0);
+ }
+
+ @Override
+ public void binderDied() {
+ synchronized (service) {
+ if (hasExternalProcessHandles() &&
+ externalProcessTokenToHandle.get(mToken) != null) {
+ removeExternalProcessHandleInternalLocked(mToken);
+ }
+ }
+ }
+ }
}