c++ - child waiting for another child -

is there way forked child examine forked child that, if other forked child takes more time usual perform chores, first child may perform predefined steps? if so, sample code appreciated.

yes. fork process watched, from process watch it.

if (fork() == 0) {     // watcher     pid_t watchee_pid = fork();     if (watchee_pid != 0) {         // wait and/or handle timeout         int status;         waitpid(watchee_pid, &status, wnohang);     } else {         // we're being watched. stuff     } } else {     // original process } 

to emphasise: there 3 processes. original, watcher process (that handles timeout etc.) , actual watched process.