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Linux / Unix Command: alarm
Command Library


alarm - set an alarm clock for delivery of a signal  


#include <unistd.h>

unsigned int alarm(unsigned int seconds);


alarm arranges for a SIGALRM signal to be delivered to the process in seconds seconds.

If seconds is zero, no new alarm is scheduled.

In any event any previously set alarm is cancelled.  


alarm returns the number of seconds remaining until any previously scheduled alarm was due to be delivered, or zero if there was no previously scheduled alarm.  


setitimer(2), signal(2), sigaction(2), gettimeofday(2), select(2), pause(2), sleep(3)

Important: Use the man command (% man) to see how a command is used on your particular computer.

>> Linux/Unix Command Library

>> Shell Command Library

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