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RocketLink!--> Man page versions: OpenBSD FreeBSD Others

[IEEE Std1003.1-1990 (``POSIX'').]

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 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 su-
     persede the prior call.  The request alarm(0) voids the current alarm.

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

     The alarm() function conforms to IEEE Std1003.1-1990 (``POSIX'').

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

OpenBSD 2.6                     April 19, 1994                               1

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

[Detailed Topics]
FreeBSD Sources for alarm(3) functions
OpenBSD sources for alarm(3)

[Overview Topics]

Up to: Real-Time related - time of day, elapsed time, sleeping, waiting for events. time(), gmtime(), localtime(), etc.
Up to: Process Signals and Events - Sending and handling signals and events.
Up to: Current Process Control - control of the currently running process, longjmp, wait, sleep, argument processing

RocketLink!--> Man page versions: OpenBSD FreeBSD Others

[IEEE Std1003.1-1990 (``POSIX'').]

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