ALARM(3)                  386BSD Programmer's 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
     terminating signal SIGALRM. When the signal has successfully been caught,
     alarm() returns the amount of time left on the clock.  The maximum mumber
     of seconds allowed is 2147483647.

     If an alarm has been set with alarm(), another call to alarm() will
     superceed 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, 1991                               1