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alevt - X11 Teletext/Videotext browser…  more info»


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 for‐
       mat of the date(1) command.

       A summary of options is included below.

       -set              Set system time from time received via

       -delta seconds    Maximum allowed adjustment made to the sys‐
                         tem 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

       -vbi device       Use the given device name.  Default:
                         /dev/vbi, /dev/vbi0, /dev/video0,
                         /dev/dvb/adapter0/demux0 tried in this

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

       -progname name    Specifies the program name if using the DVB

       -pid pid          Specifies the teletext PID if using the DVB

       --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.

       The -progname or -pid option specifies the program or tele‐
       text PID if using the DVB interface.

       If neither of these two options is used, alevt outputs infor‐
       mations about the currently accessible streams and uses the
       first of these PIDs as default. This output contains the PIDs
       and names that can be used as an input for the -progname or
       -pid option in the context of the currently chosen TV chan‐



       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 sec‐
       onds 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)
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