protected internal override void WriteLocalWrapperScript(Path launchDst, Path pidFile
, TextWriter pout)
{
string exitCodeFile = ContainerLaunch.GetExitCodeFile(pidFile.ToString());
string tmpFile = exitCodeFile + ".tmp";
pout.WriteLine("#!/usr/bin/env bash");
pout.WriteLine("bash \"" + this.sessionScriptPath.ToString() + "\"");
pout.WriteLine("rc=$?");
pout.WriteLine("echo $rc > \"" + tmpFile + "\"");
pout.WriteLine("mv -f \"" + tmpFile + "\" \"" + exitCodeFile + "\"");
pout.WriteLine("exit $rc");
}
/// <summary>Recover an already existing container.</summary>
/// <remarks>
/// Recover an already existing container. This is a blocking call and returns
/// only when the container exits. Note that the container must have been
/// activated prior to this call.
/// </remarks>
/// <param name="user">the user of the container</param>
/// <param name="containerId">The ID of the container to reacquire</param>
/// <returns>The exit code of the pre-existing container</returns>
/// <exception cref="System.IO.IOException"/>
/// <exception cref="System.Exception"></exception>
public virtual int ReacquireContainer(string user, ContainerId containerId)
{
Path pidPath = GetPidFilePath(containerId);
if (pidPath == null)
{
Log.Warn(containerId + " is not active, returning terminated error");
return(ContainerExecutor.ExitCode.Terminated.GetExitCode());
}
string pid = null;
pid = ProcessIdFileReader.GetProcessId(pidPath);
if (pid == null)
{
throw new IOException("Unable to determine pid for " + containerId);
}
Log.Info("Reacquiring " + containerId + " with pid " + pid);
while (IsContainerProcessAlive(user, pid))
{
Sharpen.Thread.Sleep(1000);
}
// wait for exit code file to appear
string exitCodeFile = ContainerLaunch.GetExitCodeFile(pidPath.ToString());
FilePath file = new FilePath(exitCodeFile);
int sleepMsec = 100;
int msecLeft = 2000;
while (!file.Exists() && msecLeft >= 0)
{
if (!IsContainerActive(containerId))
{
Log.Info(containerId + " was deactivated");
return(ContainerExecutor.ExitCode.Terminated.GetExitCode());
}
Sharpen.Thread.Sleep(sleepMsec);
msecLeft -= sleepMsec;
}
if (msecLeft < 0)
{
throw new IOException("Timeout while waiting for exit code from " + containerId);
}
try
{
return(System.Convert.ToInt32(FileUtils.ReadFileToString(file).Trim()));
}
catch (FormatException e)
{
throw new IOException("Error parsing exit code from pid " + pid, e);
}
}