D-SP-Ch9ai-alarm_pause

alarm

Function Prototype

unsigned int alarm(unsigned int secs)

Function

• SIGALRM is generated when the timer expired
• The alarm might not be accurate because of CPU scheduling
• When the previous alarm is replaced by the new value, the left seconds is returned
• alarm(0) resets the alarm

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pause

Function Prototype

int pause(void)

Function

• pause() suspends the calling process until receiving a signal
• Returns -1 with errno set to EINTR