alarm man page on 4.4BSD

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ALARM(3)		 BSD Library Functions Manual		      ALARM(3)

NAME
     alarm — set signal timer alarm

SYNOPSIS
     #include <unistd.h>

     u_int
     alarm(u_int seconds);

DESCRIPTION
     This interface is made obsolete by setitimer(2).

     The alarm() function waits a count of seconds before asserting the termi‐
     nating signal SIGALRM.  When the signal has successfully been caught,
     alarm() returns the amount of time left on the clock.  The maximum number
     of seconds allowed is 2147483647.

     If an alarm has been set with alarm(), another call to alarm() will
     supersede the prior call.	The request alarm(0) voids the current alarm.

SEE ALSO
     sigaction(2), setitimer(2), sigpause(2), sigvec(2), signal(3), sleep(3),
     ualarm(3), usleep(3)

HISTORY
     An alarm() function appeared in Version 7 AT&T UNIX.

4th Berkeley Distribution	April 19, 1994	     4th Berkeley Distribution
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