Add primitive FIFO and hook it up to sys$pipe().

It's now possible to do this in bash:

cat kernel.map | fgrep List

This is very cool! :^)

Kernel/Console.cpp

@@ -43,7 +43,7 @@ ssize_t Console::write(const byte* data, size_t size)
         return 0;
     for (size_t i = 0; i < size; ++i)
         putChar(data[i]);
-    return 0;
+    return size;
 }
 
 void Console::putChar(char ch)