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I am writing a program to grade C++ code that students submit. Right now it uses a system call to compile every source file then redirects the input to a file and calls the new executables in processes and searches the output for certain strings. This also allows me to have a timeout on processes for programs that crash.
Is there a better way to do this than a system call? Or a better way to do this in general?
You may want to run the programs under an alternate account, e.g. ssh with key-based authentication is a good way to switch to a dummy account.
If any of the assignments require user interaction, then
expect(which is Tcl-based) would be a good choice.