link c++ and bash?

Ha1f · 01-21-2006, 09:19 PM

Hi all,

I'd like to know if this is possible. I'm writing a C++ program that I want to run bash scripts. The thing is, I'd like to be able to take the result of the script and use it as a value in my C++ program. For instance, if the script failed (either because of an error, or because it acheived a value within itself that would return a failure) I'd like the C++ program to be able to take that value and use it. Is this possible? If so, how?

Thanks

carl.waldbieser · 01-21-2006, 09:54 PM

Quote:

Originally Posted by Ha1f

Hi all,

I'd like to know if this is possible. I'm writing a C++ program that I want to run bash scripts. The thing is, I'd like to be able to take the result of the script and use it as a value in my C++ program. For instance, if the script failed (either because of an error, or because it acheived a value within itself that would return a failure) I'd like the C++ program to be able to take that value and use it. Is this possible? If so, how?

Thanks

The easiest way would be to have your bash script emit the information you want from it to standard output or standard error. Then you could just use the normal C++ facilities to read from those streams.

There are other techniques for IPC (inter-process communication), but in *NIX environments, the standard streams are some of the simplest to work with.

paulsm4 · 01-21-2006, 10:50 PM

And of course there's always "popen()": it'll read stdout from your script; it'll also read your script's "exit" status: whichever (or both) you prefer.

"man 3 popen", if you're interested.

Ha1f · 01-22-2006, 07:11 AM

wow--thats awesome.

thanks so much guys!!