I have a tool that can receive some parameters via system(...) but also needs (and waits for) some STDIN input that is needed. The program has no option to read this out of a file or to input via a parameter. Does there exist any way to automate this STDIN so the program does not wait for it or if it has to wait, to make that STDIN coming from a file or whatever? I hape I didnt confuse you. Thank you very much.