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NAME 
        ualarm - set an alarm clock for delivery of a signal 
 
SYNTAX 
        int ualarm(int useconds); 
 
DESCRIPTION 
        ualarm arranges for a SIGALRM signal to be delivered to the 
        process in useconds micro seconds. 
 
        If useconds is zero, no new alarm is scheduled. 
 
        In any event any previously set alarm is cancelled. 
 
RETURN VALUE 
        ualarm returns the number of microseconds seconds  remaining 
        until any previously  scheduled  alarm  was  due to be delivered, or 
        zero if there was no previously scheduled alarm. 
 
SEE ALSO 
        signal