alarm man page on OpenBSD

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ALARM(3)		  OpenBSD Programmer's Manual		      ALARM(3)

     alarm - set signal timer alarm

     #include <unistd.h>

     unsigned int
     alarm(unsigned int seconds);

     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 number of seconds allowed is 100000000.

     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.

     If the call succeeds, any time left remaining from a previous call is
     returned.	If an error occurs, the value -1 is returned, and a more
     precise error code is placed in the global variable errno.

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

     The alarm() function conforms to IEEE Std 1003.1-1990 (``POSIX'').

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

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9

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