Move ringtone redirection to MediaPlayer.

Way back in API 1 we defined Settings.System.DEFAULT_NOTIFICATION_URI
which redirects through SettingsProvider before finally ariving at
the real underlying ContentProvider, usually MediaStore.

With new SELinux rules, we're no longer allowing the system_server
to hold open FDs to shared storage devices, which causes these
proxied openFile() calls to fail.

To work around this, teach MediaPlayer to resolve the final ringtone
Uri without going through the system.

Bug: 18226181
Change-Id: I40c68617c952c0bb3e939e5084f5b68a35e31ae3

1 files changed, 2 insertions, 74 deletions

diff --git a/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java b/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
index 34e57bc..6828301 100644
--- a/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
+++ b/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
@@ -37,13 +37,11 @@ import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.pm.PackageManager;
 import android.content.pm.UserInfo;
-import android.content.res.AssetFileDescriptor;
 import android.database.AbstractCursor;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteException;
 import android.database.sqlite.SQLiteQueryBuilder;
-import android.media.RingtoneManager;
 import android.net.Uri;
 import android.os.Binder;
 import android.os.Bundle;
@@ -54,7 +52,6 @@ import android.os.Process;
 import android.os.SystemProperties;
 import android.os.UserHandle;
 import android.os.UserManager;
-import android.provider.MediaStore;
 import android.provider.Settings;
 import android.provider.Settings.Secure;
 import android.text.TextUtils;
@@ -1228,77 +1225,8 @@ public class SettingsProvider extends ContentProvider {
 
     @Override
     public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
-
-        /*
-         * When a client attempts to openFile the default ringtone or
-         * notification setting Uri, we will proxy the call to the current
-         * default ringtone's Uri (if it is in the media provider).
-         */
-        int ringtoneType = RingtoneManager.getDefaultType(uri);
-        // Above call returns -1 if the Uri doesn't match a default type
-        if (ringtoneType != -1) {
-            Context context = getContext();
-
-            // Get the current value for the default sound
-            Uri soundUri = RingtoneManager.getActualDefaultRingtoneUri(context, ringtoneType);
-
-            if (soundUri != null) {
-                // Proxy the openFile call to media provider
-                String authority = soundUri.getAuthority();
-                if (authority.equals(MediaStore.AUTHORITY)) {
-                    return context.getContentResolver().openFileDescriptor(soundUri, mode);
-                }
-            }
-        }
-
-        return super.openFile(uri, mode);
-    }
-
-    @Override
-    public AssetFileDescriptor openAssetFile(Uri uri, String mode) throws FileNotFoundException {
-
-        /*
-         * When a client attempts to openFile the default ringtone or
-         * notification setting Uri, we will proxy the call to the current
-         * default ringtone's Uri (if it is in the media provider).
-         */
-        int ringtoneType = RingtoneManager.getDefaultType(uri);
-        // Above call returns -1 if the Uri doesn't match a default type
-        if (ringtoneType != -1) {
-            Context context = getContext();
-
-            // Get the current value for the default sound
-            Uri soundUri = RingtoneManager.getActualDefaultRingtoneUri(context, ringtoneType);
-
-            if (soundUri != null) {
-                // Proxy the openFile call to media provider
-                String authority = soundUri.getAuthority();
-                if (authority.equals(MediaStore.AUTHORITY)) {
-                    ParcelFileDescriptor pfd = null;
-                    try {
-                        pfd = context.getContentResolver().openFileDescriptor(soundUri, mode);
-                        return new AssetFileDescriptor(pfd, 0, -1);
-                    } catch (FileNotFoundException ex) {
-                        // fall through and open the fallback ringtone below
-                    }
-                }
-
-                try {
-                    return super.openAssetFile(soundUri, mode);
-                } catch (FileNotFoundException ex) {
-                    // Since a non-null Uri was specified, but couldn't be opened,
-                    // fall back to the built-in ringtone.
-                    return context.getResources().openRawResourceFd(
-                            com.android.internal.R.raw.fallbackring);
-                }
-            }
-            // no need to fall through and have openFile() try again, since we
-            // already know that will fail.
-            throw new FileNotFoundException(); // or return null ?
-        }
-
-        // Note that this will end up calling openFile() above.
-        return super.openAssetFile(uri, mode);
+        throw new FileNotFoundException("Direct file access no longer supported; "
+                + "ringtone playback is available through android.media.Ringtone");
     }
 
     /**