/*
 * Copyright 2013 Yuichiro Moriguchi
 *
 * 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 net.morilib.sh.builtin;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;

import net.morilib.sh.ShEnvironment;
import net.morilib.sh.ShExitException;
import net.morilib.sh.ShFileSystem;
import net.morilib.sh.ShProcess;

public class ShExit implements ShProcess {

	public int main(ShEnvironment env, ShFileSystem fs,
			InputStream stdin, PrintStream stdout, PrintStream stderr,
			String... args) throws IOException {
		try {
			throw new ShExitException(
					args.length > 1 ? Integer.parseInt(args[1]) : 0);
		} catch(NumberFormatException e) {
			throw new ShExitException(0);
		}
	}

}
