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Member "alevt-1.6.3/alevt-date.1.in" of archive alevt-1.6.3.tar.gz:
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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.
/dev/vbi*
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 <froese@gmx.de>
*g*.
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