It is often the case that one needs to test a system before the hardware is available or on-line. In my case, I'm developing an interface which will talk to a socket on a complex piece of Fab Metrology gear called an Applied Materials NanoSEM, using a complex protocol called SEMI SECS-II/GEM HSMS. I needed a quick and dirty handler to act as the NanoSEM while I get the protocol parser working.read full tutorial.
Traditionally, Unix/Linux/POSIX filenames can be almost any sequence of bytes, and their meaning is unassigned. The only real rules are that "/" is always the directory separator, and that filenames can't contain byte 0 (because this is the terminator). Although this is flexible, this creates many unnecessary problems. In particular, this lack of limitations makes it unnecessarily difficult to write correct programs (enabling many security flaws), makes it impossible to consistently and accurately display filenames, causes portability problems, and confuses users. more ....
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