In a C# application, I'd like to determine whether another .NET application is a Console application or not.
Can this be done using the reflection APIs?
EDIT: OK, it doesn't look like I'm going to get a good answer to this question because it doesn't look like the framework exposes the functionality I want. I dug around in the PE/COFF spec and came up with this:
/// <summary>
/// Parses the PE header and determines whether the given assembly is a console application.
/// </summary>
/// <param name="assemblyPath">The path of the assembly to check.</param>
/// <returns>True if the given assembly is a console application; false otherwise.</returns>
/// <remarks>The magic numbers in this method are extracted from the PE/COFF file
/// format specification available from http://www.microsoft.com/whdc/system/platform/firmware/pecoff.mspx
/// </remarks>
bool AssemblyUsesConsoleSubsystem(string assemblyPath)
{
using (var s = new FileStream(assemblyPath, FileMode.Open, FileAccess.Read))
{
var rawPeSignatureOffset = new byte[4];
s.Seek(0x3c, SeekOrigin.Begin);
s.Read(rawPeSignatureOffset, 0, 4);
int peSignatureOffset = rawPeSignatureOffset[0];
peSignatureOffset |= rawPeSignatureOffset[1] << 8;
peSignatureOffset |= rawPeSignatureOffset[2] << 16;
peSignatureOffset |= rawPeSignatureOffset[3] << 24;
var coffHeader = new byte[24];
s.Seek(peSignatureOffset, SeekOrigin.Begin);
s.Read(coffHeader, 0, 24);
byte[] signature = {(byte)'P', (byte)'E', (byte)'\0', (byte)'\0'};
for (int index = 0; index < 4; index++)
{
Assert.That(coffHeader[index], Is.EqualTo(signature[index]),
"Attempted to check a non PE file for the console subsystem!");
}
var subsystemBytes = new byte[2];
s.Seek(68, SeekOrigin.Current);
s.Read(subsystemBytes, 0, 2);
int subSystem = subsystemBytes[0] | subsystemBytes[1] << 8;
return subSystem == 3; /*IMAGE_SUBSYSTEM_WINDOWS_CUI*/
}
}