/// <summary>
/// Dispose: free owned resources.
/// </summary>
/// <param name="disposing"></param>
protected override void Dispose(bool disposing)
{
if (disposing)
{
// Resources created by Designer.
if (components != null)
{
components.Dispose();
}
// Named pipe
if (pstream != null)
{
try
{
pstream.Close();
pstream.Dispose();
}
catch { }
}
}
base.Dispose(disposing);
}
/// <summary>
/// Runs as LOCAL SYSTEM from temp path; receives info from updater UI; checks package; executes installer.
/// </summary>
public static void Work()
{
// The service pipe we're listening through.
NamedPipeStream pstream = null;
try
{
// Create service pipe
FileLogger.Instance.LogInfo("Creating named pipe.");
FileSecurity pipeSecurity = new FileSecurity();
pipeSecurity.AddAccessRule(new FileSystemAccessRule(new SecurityIdentifier("S-1-5-11"), FileSystemRights.FullControl, AccessControlType.Allow));
pstream = NamedPipeStream.Create(Magic.ServiceShortName, NamedPipeStream.ServerMode.Bidirectional, pipeSecurity);
// Wait for client (updater UI) to connect; but not too long.
FileLogger.Instance.LogInfo("Waiting for client to connect.");
if (!doListen(ref pstream))
{
throw new Exception("Client didn't show up; tired of waiting.");
}
FileLogger.Instance.LogInfo("Client connected, reading paths and hash.");
// Read location of downloaded installer and its file hash.
string fname, fhash;
doReadRequest(pstream, out fname, out fhash);
// Verify signature
FileLogger.Instance.LogInfo("Info received; verifying signature.");
if (!SignatureCheck.VerifySignature(new FileInfo(fname), fhash))
{
throw new Exception("Signature incorrect.");
}
FileLogger.Instance.LogInfo("Installer signature OK; launching installer");
// Let caller know we've started installer
pstream.WriteByte(Magic.SrvCodeInstallStarted);
// Launch installer
int exitCode = doRunInstaller(fname);
FileLogger.Instance.LogInfo("Installer returned exit code " + exitCode.ToString());
// Exit code 1 is failure
if (exitCode == 1)
{
throw new Exception("Installer failed.");
}
// We've succeeded; let caller know.
pstream.WriteByte(Magic.SrvCodeSuccess);
FileLogger.Instance.LogInfo("Finished with success; quitting.");
}
catch
{
// Upon error, return failure code to caller.
if (pstream != null)
{
try { pstream.WriteByte(Magic.SrvCodeFail); }
catch { }
}
throw;
}
finally
{
// Close & dispose of service pipe before we exit left.
if (pstream != null)
{
try
{
pstream.Close();
pstream.Dispose();
pstream = null;
}
catch { }
}
}
}
