Forcing the parent process to run first

Question

On my system(Opensuse) by default the child process always executes first, after fork. There are also ways to force the child process to run first. I would like to know if there is any way to force the parent process to run first?

Answer 1

You can use this method

pid_t pid = fork();
if (pid == -1)
    abort();
else if (pid == 0) 
{
    raise(SIGSTOP); // stop the child
} 
else 
{
    waitpid(pid, NULL, WUNTRACED); // wait until the child is stopped
    kill(pid, SIGCONT); // resume the child
}