public static ManagementObjectCollection QueryLocalWMICollection(string scope, string query)
{
ManagementScope ms = null;
int numTrial = 0;
bool connected = false;
do
{
try
{
if (scope == null)
{
ms = new ManagementScope(@"\\.\root\cimv2", new ConnectionOptions());
}
else
{
ms = new ManagementScope(scope, new ConnectionOptions());
}
ms.Connect();
connected = true;
}
catch (Exception) // in the booting period, the WMI service may not be ready;
{
EucaLogger.Warning("WMI service is not responding; will retry");
System.Threading.Thread.Sleep(PAUSE_SEC_BETWEEN_RETRY * 1000);
continue;
}
} while (numTrial++ < RETRY);
if (!connected || ms == null || !ms.IsConnected)
{
throw new EucaException("Cannot establish connection to the management provider");
}
ManagementObjectSearcher searcher = new ManagementObjectSearcher(ms, new ObjectQuery(query));
ManagementObjectCollection result = searcher.Get();
searcher.Dispose();
return(result);
}
public static System.Diagnostics.Process SpawnProcess(string exe, string args, string workingDir,
KeyValuePair <string, string>[] env, DataReceivedEventHandler outputHandler,
DataReceivedEventHandler errorHandler)
{
try
{
System.Diagnostics.Process proc = new System.Diagnostics.Process();
proc.StartInfo.UseShellExecute = false;
if (workingDir != null)
{
proc.StartInfo.WorkingDirectory = workingDir;
}
proc.StartInfo.RedirectStandardError = true;
proc.StartInfo.RedirectStandardOutput = true;
proc.StartInfo.FileName = exe;
proc.StartInfo.Arguments = args;
if (env != null)
{
foreach (KeyValuePair <string, string> kv in env)
{
if (kv.Key.ToLower() == "path")
{
try
{
string path = proc.StartInfo.EnvironmentVariables["Path"];
if (path != null)
{
path += string.Format(";{0}", kv.Value);
}
else
{
path = kv.Value;
}
proc.StartInfo.EnvironmentVariables["Path"] = path;
}
catch (Exception e)
{
EucaLogger.Exception(EucaLogger.LOG_WARNING, "couldn't set path variable", e);
}
}
else
{
proc.StartInfo.EnvironmentVariables.Add(kv.Key, kv.Value);
}
}
}
if (outputHandler != null)
{
proc.OutputDataReceived += outputHandler;
}
if (errorHandler != null)
{
proc.ErrorDataReceived += errorHandler;
}
proc.Start();
return(proc);
}
catch (Exception e)
{
throw new EucaException("Execution failed: " + e.Message, e);
}
}
