122 lines
4.0 KiB
Scala
122 lines
4.0 KiB
Scala
/*
|
|
* Shadowsocks - A shadowsocks client for Android
|
|
* Copyright (C) 2016 <max.c.lv@gmail.com>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
* ___====-_ _-====___
|
|
* _--^^^#####// \\#####^^^--_
|
|
* _-^##########// ( ) \\##########^-_
|
|
* -############// |\^^/| \\############-
|
|
* _/############// (@::@) \\############\_
|
|
* /#############(( \\// ))#############\
|
|
* -###############\\ (oo) //###############-
|
|
* -#################\\ / VV \ //#################-
|
|
* -###################\\/ \//###################-
|
|
* _#/|##########/\######( /\ )######/\##########|\#_
|
|
* |/ |#/\#/\#/\/ \#/\##\ | | /##/\#/ \/\#/\#/\#| \|
|
|
* ` |/ V V ` V \#\| | | |/#/ V ' V V \| '
|
|
* ` ` ` ` / | | | | \ ' ' ' '
|
|
* ( | | | | )
|
|
* __\ | | | | /__
|
|
* (vvv(VVV)(VVV)vvv)
|
|
*
|
|
* HERE BE DRAGONS
|
|
*
|
|
*/
|
|
|
|
package com.github.shadowsocks
|
|
|
|
import java.io.{IOException, InputStream, OutputStream}
|
|
import java.lang.System.currentTimeMillis
|
|
import java.util.concurrent.Semaphore
|
|
|
|
import android.util.Log
|
|
|
|
import scala.collection.JavaConversions._
|
|
|
|
/**
|
|
* @author ayanamist@gmail.com
|
|
*/
|
|
class GuardedProcess(cmd: Seq[String]) extends Process {
|
|
private val TAG = classOf[GuardedProcess].getSimpleName
|
|
|
|
@volatile private var guardThread: Thread = _
|
|
@volatile private var isDestroyed: Boolean = _
|
|
@volatile private var process: Process = _
|
|
|
|
def start(onRestartCallback: () => Unit = null): GuardedProcess = {
|
|
val semaphore = new Semaphore(1)
|
|
semaphore.acquire
|
|
@volatile var ioException: IOException = null
|
|
|
|
guardThread = new Thread(() => {
|
|
try {
|
|
var callback: () => Unit = null
|
|
while (!isDestroyed) {
|
|
Log.i(TAG, "start process: " + cmd)
|
|
val startTime = currentTimeMillis
|
|
|
|
process = new ProcessBuilder(cmd).redirectErrorStream(true).start
|
|
|
|
if (callback == null) callback = onRestartCallback else callback()
|
|
|
|
semaphore.release
|
|
process.waitFor
|
|
|
|
if (currentTimeMillis - startTime < 1000) {
|
|
Log.w(TAG, "process exit too fast, stop guard: " + cmd)
|
|
isDestroyed = true
|
|
}
|
|
}
|
|
} catch {
|
|
case ignored: InterruptedException =>
|
|
Log.i(TAG, "thread interrupt, destroy process: " + cmd)
|
|
process.destroy()
|
|
case e: IOException => ioException = e
|
|
} finally semaphore.release
|
|
}, "GuardThread-" + cmd)
|
|
|
|
guardThread.start()
|
|
semaphore.acquire
|
|
|
|
if (ioException != null) {
|
|
throw ioException
|
|
}
|
|
|
|
this
|
|
}
|
|
|
|
def destroy() {
|
|
isDestroyed = true
|
|
guardThread.interrupt()
|
|
process.destroy()
|
|
try guardThread.join() catch {
|
|
case ignored: InterruptedException =>
|
|
}
|
|
}
|
|
|
|
def exitValue: Int = throw new UnsupportedOperationException
|
|
def getErrorStream: InputStream = throw new UnsupportedOperationException
|
|
def getInputStream: InputStream = throw new UnsupportedOperationException
|
|
def getOutputStream: OutputStream = throw new UnsupportedOperationException
|
|
|
|
@throws(classOf[InterruptedException])
|
|
def waitFor = {
|
|
guardThread.join()
|
|
0
|
|
}
|
|
}
|