How to get the return value of a program ran via calling a member of the exec family of functions?

Question

I know that it is possible to read commands output with a pipe? But what about getting return value ? For example i want to execute:

execl(\"/bin/ping\", \"/         


        

Answer 1

You can use waitpid to get the exit status of you child process as:

int childExitStatus;
waitpid( pID, &childExitStatus, 0); // where pID is the process ID of the child.