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

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

     ualarm - schedule signal after specified time

     #include <unistd.h>

     ualarm(useconds_t microseconds, useconds_t interval);

     This is a simplified interface to setitimer(2).

     The ualarm() function waits a count of microseconds before asserting the
     terminating signal SIGALRM. System activity or time used in processing
     the call may cause a slight delay.

     If the interval argument is non-zero, the SIGALRM signal will be sent to
     the process every interval microseconds after the timer expires (e.g. af-
     ter microseconds number of microseconds have passed).

     When the signal has successfully been caught, ualarm() returns the amount
     of time left on the clock.  The maximum value for microseconds allowed is

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

     The ualarm() function conforms to X/Open Portability Guide Issue 4.2

     The ualarm() function appeared in 4.3BSD.

OpenBSD 2.6                    November 4, 1997                              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 ualarm(3) functions
OpenBSD sources for ualarm(3)

[Overview Topics]

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

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