ALARM(3)ALARM(3)NAMEalarm - schedule signal after specified time
SYNOPSIS
unsigned int alarm(unsigned seconds);
DESCRIPTION
This interface is made obsolete by setitimer(2).
Alarm causes signal SIGALRM, see sigvec(2), to be sent to the invoking
process in a number of seconds given by the argument. Unless caught or
ignored, the signal terminates the process.
Alarm requests are not stacked; successive calls reset the alarm clock.
If the argument is 0, any alarm request is canceled. Because of
scheduling delays, resumption of execution of when the signal is caught
may be delayed an arbitrary amount. The longest specifiable delay time
is 2147483647 seconds.
The return value is the amount of time previously remaining in the
alarm clock.
SEE ALSOsigpause(2), sigvec(2), signal(3C), sleep(3), ualarm(3), usleep(3)4th Berkeley Distribution August 1, 1992 ALARM(3)