in com/android/server/SystemConfig.java [371:729]
private void readPermissionsFromXml(File permFile, int permissionFlag) {
FileReader permReader = null;
try {
permReader = new FileReader(permFile);
} catch (FileNotFoundException e) {
Slog.w(TAG, "Couldn't find or open permissions file " + permFile);
return;
}
final boolean lowRam = ActivityManager.isLowRamDeviceStatic();
try {
XmlPullParser parser = Xml.newPullParser();
parser.setInput(permReader);
int type;
while ((type=parser.next()) != parser.START_TAG
&& type != parser.END_DOCUMENT) {
;
}
if (type != parser.START_TAG) {
throw new XmlPullParserException("No start tag found");
}
if (!parser.getName().equals("permissions") && !parser.getName().equals("config")) {
throw new XmlPullParserException("Unexpected start tag in " + permFile
+ ": found " + parser.getName() + ", expected 'permissions' or 'config'");
}
boolean allowAll = permissionFlag == ALLOW_ALL;
boolean allowLibs = (permissionFlag & ALLOW_LIBS) != 0;
boolean allowFeatures = (permissionFlag & ALLOW_FEATURES) != 0;
boolean allowPermissions = (permissionFlag & ALLOW_PERMISSIONS) != 0;
boolean allowAppConfigs = (permissionFlag & ALLOW_APP_CONFIGS) != 0;
boolean allowPrivappPermissions = (permissionFlag & ALLOW_PRIVAPP_PERMISSIONS) != 0;
boolean allowOemPermissions = (permissionFlag & ALLOW_OEM_PERMISSIONS) != 0;
boolean allowApiWhitelisting = (permissionFlag & ALLOW_HIDDENAPI_WHITELISTING) != 0;
while (true) {
XmlUtils.nextElement(parser);
if (parser.getEventType() == XmlPullParser.END_DOCUMENT) {
break;
}
String name = parser.getName();
if ("group".equals(name) && allowAll) {
String gidStr = parser.getAttributeValue(null, "gid");
if (gidStr != null) {
int gid = android.os.Process.getGidForName(gidStr);
mGlobalGids = appendInt(mGlobalGids, gid);
} else {
Slog.w(TAG, "<group> without gid in " + permFile + " at "
+ parser.getPositionDescription());
}
XmlUtils.skipCurrentTag(parser);
continue;
} else if ("permission".equals(name) && allowPermissions) {
String perm = parser.getAttributeValue(null, "name");
if (perm == null) {
Slog.w(TAG, "<permission> without name in " + permFile + " at "
+ parser.getPositionDescription());
XmlUtils.skipCurrentTag(parser);
continue;
}
perm = perm.intern();
readPermission(parser, perm);
} else if ("assign-permission".equals(name) && allowPermissions) {
String perm = parser.getAttributeValue(null, "name");
if (perm == null) {
Slog.w(TAG, "<assign-permission> without name in " + permFile + " at "
+ parser.getPositionDescription());
XmlUtils.skipCurrentTag(parser);
continue;
}
String uidStr = parser.getAttributeValue(null, "uid");
if (uidStr == null) {
Slog.w(TAG, "<assign-permission> without uid in " + permFile + " at "
+ parser.getPositionDescription());
XmlUtils.skipCurrentTag(parser);
continue;
}
int uid = Process.getUidForName(uidStr);
if (uid < 0) {
Slog.w(TAG, "<assign-permission> with unknown uid \""
+ uidStr + " in " + permFile + " at "
+ parser.getPositionDescription());
XmlUtils.skipCurrentTag(parser);
continue;
}
perm = perm.intern();
ArraySet<String> perms = mSystemPermissions.get(uid);
if (perms == null) {
perms = new ArraySet<String>();
mSystemPermissions.put(uid, perms);
}
perms.add(perm);
XmlUtils.skipCurrentTag(parser);
} else if ("library".equals(name) && allowLibs) {
String lname = parser.getAttributeValue(null, "name");
String lfile = parser.getAttributeValue(null, "file");
if (lname == null) {
Slog.w(TAG, "<library> without name in " + permFile + " at "
+ parser.getPositionDescription());
} else if (lfile == null) {
Slog.w(TAG, "<library> without file in " + permFile + " at "
+ parser.getPositionDescription());
} else {
//Log.i(TAG, "Got library " + lname + " in " + lfile);
mSharedLibraries.put(lname, lfile);
}
XmlUtils.skipCurrentTag(parser);
continue;
} else if ("feature".equals(name) && allowFeatures) {
String fname = parser.getAttributeValue(null, "name");
int fversion = XmlUtils.readIntAttribute(parser, "version", 0);
boolean allowed;
if (!lowRam) {
allowed = true;
} else {
String notLowRam = parser.getAttributeValue(null, "notLowRam");
allowed = !"true".equals(notLowRam);
}
if (fname == null) {
Slog.w(TAG, "<feature> without name in " + permFile + " at "
+ parser.getPositionDescription());
} else if (allowed) {
addFeature(fname, fversion);
}
XmlUtils.skipCurrentTag(parser);
continue;
} else if ("unavailable-feature".equals(name) && allowFeatures) {
String fname = parser.getAttributeValue(null, "name");
if (fname == null) {
Slog.w(TAG, "<unavailable-feature> without name in " + permFile + " at "
+ parser.getPositionDescription());
} else {
mUnavailableFeatures.add(fname);
}
XmlUtils.skipCurrentTag(parser);
continue;
} else if ("allow-in-power-save-except-idle".equals(name) && allowAll) {
String pkgname = parser.getAttributeValue(null, "package");
if (pkgname == null) {
Slog.w(TAG, "<allow-in-power-save-except-idle> without package in "
+ permFile + " at " + parser.getPositionDescription());
} else {
mAllowInPowerSaveExceptIdle.add(pkgname);
}
XmlUtils.skipCurrentTag(parser);
continue;
} else if ("allow-in-power-save".equals(name) && allowAll) {
String pkgname = parser.getAttributeValue(null, "package");
if (pkgname == null) {
Slog.w(TAG, "<allow-in-power-save> without package in " + permFile + " at "
+ parser.getPositionDescription());
} else {
mAllowInPowerSave.add(pkgname);
}
XmlUtils.skipCurrentTag(parser);
continue;
} else if ("allow-in-data-usage-save".equals(name) && allowAll) {
String pkgname = parser.getAttributeValue(null, "package");
if (pkgname == null) {
Slog.w(TAG, "<allow-in-data-usage-save> without package in " + permFile
+ " at " + parser.getPositionDescription());
} else {
mAllowInDataUsageSave.add(pkgname);
}
XmlUtils.skipCurrentTag(parser);
continue;
} else if ("allow-unthrottled-location".equals(name) && allowAll) {
String pkgname = parser.getAttributeValue(null, "package");
if (pkgname == null) {
Slog.w(TAG, "<allow-unthrottled-location> without package in "
+ permFile + " at " + parser.getPositionDescription());
} else {
mAllowUnthrottledLocation.add(pkgname);
}
XmlUtils.skipCurrentTag(parser);
continue;
} else if ("allow-implicit-broadcast".equals(name) && allowAll) {
String action = parser.getAttributeValue(null, "action");
if (action == null) {
Slog.w(TAG, "<allow-implicit-broadcast> without action in " + permFile
+ " at " + parser.getPositionDescription());
} else {
mAllowImplicitBroadcasts.add(action);
}
XmlUtils.skipCurrentTag(parser);
continue;
} else if ("app-link".equals(name) && allowAppConfigs) {
String pkgname = parser.getAttributeValue(null, "package");
if (pkgname == null) {
Slog.w(TAG, "<app-link> without package in " + permFile + " at "
+ parser.getPositionDescription());
} else {
mLinkedApps.add(pkgname);
}
XmlUtils.skipCurrentTag(parser);
} else if ("system-user-whitelisted-app".equals(name) && allowAppConfigs) {
String pkgname = parser.getAttributeValue(null, "package");
if (pkgname == null) {
Slog.w(TAG, "<system-user-whitelisted-app> without package in " + permFile
+ " at " + parser.getPositionDescription());
} else {
mSystemUserWhitelistedApps.add(pkgname);
}
XmlUtils.skipCurrentTag(parser);
} else if ("system-user-blacklisted-app".equals(name) && allowAppConfigs) {
String pkgname = parser.getAttributeValue(null, "package");
if (pkgname == null) {
Slog.w(TAG, "<system-user-blacklisted-app without package in " + permFile
+ " at " + parser.getPositionDescription());
} else {
mSystemUserBlacklistedApps.add(pkgname);
}
XmlUtils.skipCurrentTag(parser);
} else if ("default-enabled-vr-app".equals(name) && allowAppConfigs) {
String pkgname = parser.getAttributeValue(null, "package");
String clsname = parser.getAttributeValue(null, "class");
if (pkgname == null) {
Slog.w(TAG, "<default-enabled-vr-app without package in " + permFile
+ " at " + parser.getPositionDescription());
} else if (clsname == null) {
Slog.w(TAG, "<default-enabled-vr-app without class in " + permFile
+ " at " + parser.getPositionDescription());
} else {
mDefaultVrComponents.add(new ComponentName(pkgname, clsname));
}
XmlUtils.skipCurrentTag(parser);
} else if ("backup-transport-whitelisted-service".equals(name) && allowFeatures) {
String serviceName = parser.getAttributeValue(null, "service");
if (serviceName == null) {
Slog.w(TAG, "<backup-transport-whitelisted-service> without service in "
+ permFile + " at " + parser.getPositionDescription());
} else {
ComponentName cn = ComponentName.unflattenFromString(serviceName);
if (cn == null) {
Slog.w(TAG,
"<backup-transport-whitelisted-service> with invalid service name "
+ serviceName + " in "+ permFile
+ " at " + parser.getPositionDescription());
} else {
mBackupTransportWhitelist.add(cn);
}
}
XmlUtils.skipCurrentTag(parser);
} else if ("disabled-until-used-preinstalled-carrier-associated-app".equals(name)
&& allowAppConfigs) {
String pkgname = parser.getAttributeValue(null, "package");
String carrierPkgname = parser.getAttributeValue(null, "carrierAppPackage");
if (pkgname == null || carrierPkgname == null) {
Slog.w(TAG, "<disabled-until-used-preinstalled-carrier-associated-app"
+ " without package or carrierAppPackage in " + permFile + " at "
+ parser.getPositionDescription());
} else {
List<String> associatedPkgs =
mDisabledUntilUsedPreinstalledCarrierAssociatedApps.get(
carrierPkgname);
if (associatedPkgs == null) {
associatedPkgs = new ArrayList<>();
mDisabledUntilUsedPreinstalledCarrierAssociatedApps.put(
carrierPkgname, associatedPkgs);
}
associatedPkgs.add(pkgname);
}
XmlUtils.skipCurrentTag(parser);
} else if ("disabled-until-used-preinstalled-carrier-app".equals(name)
&& allowAppConfigs) {
String pkgname = parser.getAttributeValue(null, "package");
if (pkgname == null) {
Slog.w(TAG,
"<disabled-until-used-preinstalled-carrier-app> without "
+ "package in " + permFile + " at "
+ parser.getPositionDescription());
} else {
mDisabledUntilUsedPreinstalledCarrierApps.add(pkgname);
}
XmlUtils.skipCurrentTag(parser);
} else if ("privapp-permissions".equals(name) && allowPrivappPermissions) {
// privapp permissions from system, vendor and product partitions are stored
// separately. This is to prevent xml files in the vendor partition from
// granting permissions to priv apps in the system partition and vice
// versa.
boolean vendor = permFile.toPath().startsWith(
Environment.getVendorDirectory().toPath())
|| permFile.toPath().startsWith(
Environment.getOdmDirectory().toPath());
boolean product = permFile.toPath().startsWith(
Environment.getProductDirectory().toPath());
if (vendor) {
readPrivAppPermissions(parser, mVendorPrivAppPermissions,
mVendorPrivAppDenyPermissions);
} else if (product) {
readPrivAppPermissions(parser, mProductPrivAppPermissions,
mProductPrivAppDenyPermissions);
} else {
readPrivAppPermissions(parser, mPrivAppPermissions,
mPrivAppDenyPermissions);
}
} else if ("oem-permissions".equals(name) && allowOemPermissions) {
readOemPermissions(parser);
} else if ("hidden-api-whitelisted-app".equals(name) && allowApiWhitelisting) {
String pkgname = parser.getAttributeValue(null, "package");
if (pkgname == null) {
Slog.w(TAG, "<hidden-api-whitelisted-app> without package in " + permFile
+ " at " + parser.getPositionDescription());
} else {
mHiddenApiPackageWhitelist.add(pkgname);
}
XmlUtils.skipCurrentTag(parser);
} else {
Slog.w(TAG, "Tag " + name + " is unknown or not allowed in "
+ permFile.getParent());
XmlUtils.skipCurrentTag(parser);
continue;
}
}
} catch (XmlPullParserException e) {
Slog.w(TAG, "Got exception parsing permissions.", e);
} catch (IOException e) {
Slog.w(TAG, "Got exception parsing permissions.", e);
} finally {
IoUtils.closeQuietly(permReader);
}
// Some devices can be field-converted to FBE, so offer to splice in
// those features if not already defined by the static config
if (StorageManager.isFileEncryptedNativeOnly()) {
addFeature(PackageManager.FEATURE_FILE_BASED_ENCRYPTION, 0);
addFeature(PackageManager.FEATURE_SECURELY_REMOVES_USERS, 0);
}
// Help legacy devices that may not have updated their static config
if (StorageManager.hasAdoptable()) {
addFeature(PackageManager.FEATURE_ADOPTABLE_STORAGE, 0);
}
if (ActivityManager.isLowRamDeviceStatic()) {
addFeature(PackageManager.FEATURE_RAM_LOW, 0);
} else {
addFeature(PackageManager.FEATURE_RAM_NORMAL, 0);
}
for (String featureName : mUnavailableFeatures) {
removeFeature(featureName);
}
}