Hi !

Few of my friends and me are going to organize a little programming competition. I'm looking for a way to write a simple grader in c/c++. It should be as simple as to execute the program ( perhaps using the shell("./program.exe") ) and changing the input file ( cp input.in1 input.in, check the output.out if there is a correct number, then cp input.in2 input.in and so on. )
I might be able to do that, but I don't know how to limit the program's run time and memory space ( to let's say 1 Mb ). For time I can use "time ./program.exe", but I would like that program is terimnated if it passes the timelimit.

Hope you got what I want to say, and thanks in advance.

Check the 'ulimit' command.

time limit?
look at you watch, press control-c?

dirty?

You are going to want to use the setrlimit and getrlimit function calls, you can do a
'man setrlimit' to learn more about them. Keep in mind the ulimit
function call is obsolete and not supported by glibc anymore,
you should use setrlimit/getrlimit pair now on. On the other hand, the ulimit
bash command is still valid.