/*
* Copyright 2015-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package com.facebook.buck.util;
import java.lang.reflect.Method;
/** Fetches the user ID of the running process. */
public class UnixUserIdFetcher implements UserIdFetcher {
@Override
public long getUserId() {
try {
Class<?> cls = Class.forName("com.sun.security.auth.module.UnixSystem", true, null);
Object unixSystem = cls.newInstance();
Method getUid = cls.getDeclaredMethod("getUid");
return (long) getUid.invoke(unixSystem);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}