public int run(
SyscallReadableChannel in,
SyscallWritableChannel out,
NormalizedPath currentDirectory,
InputStream stdin,
OutputStream stdout,
OutputStream stderr,
Permissions permissions,
Links links,
Slave.Listener listener,
String resourceDirectory)
throws IOException, InterruptedException {
mLogger.info("starting a slave application");
mResourceDirectory = resourceDirectory;
initializeInitProcess();
Process process = new Process(mPidGenerator.next(), mInit);
mInit.addChild(process);
addProcess(process);
Pipe slave2hub = Pipe.open();
Pipe hub2slave = Pipe.open();
Slave slave =
new Slave(
this,
process,
new SyscallReadableChannel(hub2slave.source()),
new SyscallWritableChannel(slave2hub.sink()),
currentDirectory,
stdin,
stdout,
stderr,
permissions,
links,
listener);
process.add(slave);
mSlaveHub =
new SlaveHub(
this,
in,
out,
new SyscallReadableChannel(slave2hub.source()),
new SyscallWritableChannel(hub2slave.sink()));
new Thread(slave).start();
mSlaveHub.work();
synchronized (mAlarm) {
while (!mProcesses.isEmpty()) {
mAlarm.wait();
}
}
return !mCancelled ? mExitStatus : 255;
}
private void releaseProcess(Process process) {
process.getParent().removeChild(process);
for (Process child : process.getChildren()) {
mInit.addChild(child);
child.setParent(mInit);
}
Pid pid = process.getPid();
mPidGenerator.release(pid);
mLogger.info("released the process of pid %s", pid);
}
/** This is for fork(2). */
public Slave newProcess(
PairId pairId,
Process parent,
NormalizedPath currentDirectory,
Permissions permissions,
Links links,
Slave.Listener listener)
throws IOException {
Pid pid = mPidGenerator.next();
Process process = new Process(pid, parent, parent.dupFileTable());
parent.addChild(process);
addProcess(process);
return newSlave(pairId, process, currentDirectory, permissions, links, listener);
}
private void initializeInitProcess() {
Pid pid = new Pid(1);
mPidGenerator.use(pid);
mInit = new Process(pid);
}
