How to kill a child's process when sending a barrier with key stroke and then sending the signal to the parent that the child's procedure Killed?
Even when the child dies, the parent process usually receives a hint This is SIGCHLD signals.
This signal can be blocked by the original process, but otherwise it is always given when any child exits for any reason. Parents can tell that the child wait in family (aka wait , wait3 , wait4 ) Why come out by using any one? , Or waitpid ).
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