How do I get a child-process's return value

This is for a C++ program.

I have a program where I fork and exec to create a child process then waitpid to wait for it to end.  Then I need to get the value the child process returned but I cannot seem to find any system calls to do this.  How do I do this?   (I probably just need the name of the system call, I can probalby take it from there.)
LVL 22
nietodAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

mtmikeCommented:
You can use the WEXITSTATUS macro to extract the exit code from the status returned by waitpid()

waitpid(pid, &status, 0);
exitcode = WEXITSTATUS(status);
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
nietodAuthor Commented:
I'm SOOOOO stupid!!!!!

I don't know how I missed that.


thanks!!!!!
0
nietodAuthor Commented:
Out of curioisity.   I've been away from EE for a few months now and I'm finidinmg it now has a bizzare layout.  the questions themelfs are scrolled WAY of the right side of the  page.   Are other people experieincing this?  Is this under transition?
0
mtmikeCommented:
Under netscape/mozilla, the questions are way on the right side, but konqueror and opera display EE pages normally. IE displays them correctly too.
0
AxterCommented:
If you're having problems using the new look, you can still access the old look by prefixing oldlook.
Example:
http://oldlook.experts-exchange.com:8080/Programming/Programming_Platforms/Linux_Programming/Q_20803247.html
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Linux OS Dev

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.