this program in running time, have a child process. This process for every one seconds, father process to send a signal SIGUSR1 father, process signals, Print the current system time. When, after 10 seconds later, the child process ends, and send SIGUSR2 signal the father of the father of the process of notification process signals received SIGUSR2 withdrawal.

Packet : 615498312006121111111.rar filelist
one.c

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