system() output to HTML

[agranik]

I have the following problem.

I use a system() call to an external program written in C++.

However, I dont seem to get any output to my HTML page.

Can anone suggest what I am missing?

Maybe I need to setup some special Apache permissions to run the c++ file ( in fact, the external perl file call does not work either).

However, system("echo 4") does produce 4.

I am lost.

Thank you in advance

[daveyboy]

Is the C++ file executable?
What does "C++ file" mean? A files or a compiled program? Are you calling it with the full path?

If it doesn't work in your Perl file either, it's probably a problem with the C++ program or your webserver settings. Do you have a shell account? Can you execute it that way?

I've not used system() in PHP myself, and the manual doesn't say what it does with stderr. I would assume that that is also redirected to the browser, but that could be another source of the problem. Make sure the C++ program outputs to stdout or stderr. If it wants to write to a controlling console ( a la ssh ) you will have problems if PHP uses pipes.