/// <summary>
/// Gets the value of a registry key in HKEY_LOCAL_MACHINE.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="path">A path relative to HKEY_LOCAL_MACHINE. E.g. "SOFTWARE\\Microsoft"</param>
/// <param name="key">Key</param>
/// <param name="defaultValue">Value to return if the key does not exist.</param>
/// <returns></returns>
public static T GetHKLMValue <T>(string path, string key, T defaultValue)
{
object value = HKLM.OpenSubKey(path)?.GetValue(key);
if (value == null)
{
return(defaultValue);
}
return((T)value);
}
/// <summary>
/// Returns the requested RegistryKey or null if the key does not exist.
/// </summary>
/// <param name="path">A path relative to HKEY_LOCAL_MACHINE. E.g. "SOFTWARE\\Microsoft"</param>
/// <returns></returns>
public static RegistryKey GetHKLMKey(string path)
{
return(HKLM.OpenSubKey(path));
}
public static int Main(string[] argv)
{
RegistryKey HKLM;
RegistryKey Key;
WriteToFile = false;
// Parse the command line parameters.
if (argv.Length > 0)
{
if (argv[0] == "/?")
{
// Display the help.
Console.WriteLine("instsoft version " + VERSION_MAJOR + "." + VERSION_MINOR + ", Copyright (c) 2011, Lucas M. Suggs");
Console.WriteLine("Usage: instsoft.exe [/f path] [computername]");
return(0);
}
if ((argv[0] == "/f") && (argv.Length > 1))
{
// User specified to output to a path rather than stdout.
OutputPath = argv[1] + "\\";
WriteToFile = true;
if (!Directory.Exists(OutputPath))
{
Console.Error.WriteLine("Invalid output path: " + OutputPath);
return(ERROR_INVALID_PATH);
}
if (argv.Length > 2)
{
ComputerName = argv[2];
}
else
{
ComputerName = Environment.MachineName;
}
}
else
{
// We don't recognize the first parameter as a flag, so it
// is assumed that it is a computer name.
ComputerName = argv[0];
}
}
else
{
// No command line parameters, so grab the local computer name.
ComputerName = Environment.MachineName;
}
// Figure out the OS architecture of the computer name we are using.
x64 = GetOsArchitecture(ComputerName);
if (WriteToFile)
{
// Since we are writing to a file, craft the file name.
string FileName = OutputPath + ComputerName + "_";
// DateTime.Now.ToString("s") outputs to the format:
// 2011-12-08T16:01:35
// So we want to strip the - and : and turn the T into a - so
// we get:
// 20111208-160135
FileName += DateTime.Now.ToString("s").Replace(":", "").Replace("-", "").Replace("T", "-") + ".txt";
file = File.CreateText(FileName);
Console.WriteLine(FileName);
}
try
{
// Attempt to open the registry of the remote computer.
HKLM = RegistryKey.OpenRemoteBaseKey(RegistryHive.LocalMachine, ComputerName);
}
catch (Exception e)
{
Console.Error.WriteLine("Unable to open the registry:");
Console.Error.WriteLine(e);
return(ERROR_BAD_REGISTRY);
}
// Set up the software list.
SoftwareList = new SortedList();
try
{
// This first registry location is the MSI uninstall records.
// This location contains the most detailed information, but
// also does not contain a list of all installed software.
Key = HKLM.OpenSubKey(SoftwareListKey1);
foreach (string key in Key.GetSubKeyNames())
{
RegistryKey SubKey = Key.OpenSubKey(key);
QueryKey(SubKey);
}
// The second registry location is the MSI install records;
// however, this location, while having entries that are missing
// in the MSI uninstall records, does not have install date or
// program version information for installed software (WTF?).
Key = HKLM.OpenSubKey(SoftwareListKey2);
foreach (string key in Key.GetSubKeyNames())
{
RegistryKey SubKey = Key.OpenSubKey(key);
QueryKey(SubKey);
}
if (x64)
{
// The third registry location is the WoW6432node MSI
// uninstall records. This will pull software entries
// that were installed with an MSI flagged as 64-bit.
//
// Due to registry virtualization, this seems to be the only
// way to get the opposite architecture's list of installed
// software (opposite of the architecture of the currently
// running instsoft program).
Key = HKLM.OpenSubKey(SoftwareListKey3);
foreach (string key in Key.GetSubKeyNames())
{
RegistryKey SubKey = Key.OpenSubKey(key);
QueryKey(SubKey);
}
}
}
catch (Exception e)
{
Console.Error.WriteLine(e);
}
// Display the software list.
DisplaySoftwareList();
return(0);
}