ALEVT-DATE(1)                     Teletext time                    ALEVT-DATE(1)

       alevt-date - display/set time received via Teletext

       alevt-date [options]

       alevt-date displays the time received from a Teletext source.  It can be
       used to set the system time.  The date is not interpreted (not even
       transmitted on most channels).  So it allows only adjustment of +/-12
       hours.  The default allowed adjustment is limited to +/-2 hours (use
       -delta to change).  Without the -set option it just displays the date in
       the format of the date(1) command.

       A summary of options is included below.

       -set              Set system time from time received via Teletext.

       -delta seconds    Maximum allowed adjustment made to the system time.
                         The default is 7200 seconds (2 hours) and the maximum
                         that may be given is 12 hours.

       -format string    Format string to used to print the time.  Look at
                         strftime(3) for possible control sequences.

       -vbi device       Use the given device name (default: /dev/vbi0).

       -timeout seconds  If the time can't be detected in seconds, the program
                         is terminated with a SIGALRM.

       --help            Show summary of options.

       --version         Show version of program.

       Before starting this program, you have to set the TV channel with another
       program like xawtv of set-tv.

       Note: This program does not set the battery backed up clock of your
       computer.  clock -w will do this.


       alevt(1x), alevt-cap(1), strftime(3), date(1), clock(8).

       This program is just a toy.  The time transmitted by the TV stations is
       more than inaccurate.  Some are within a few seconds of your local time
       reference but others are more then 15 minutes off.  You've been warned.
       (And don't assume the pkt8/30 time is better.  It's even worse.)

       No bug reports to <> *g*.

LINUX                                 1.6.2                        ALEVT-DATE(1)