suse man page for alevt-date

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

NAME
       alevt-date - display/set time received via Teletext

SYNOPSIS
       alevt-date [options]

DESCRIPTION
       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.

OPTIONS
       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.

FILES
       /dev/vbi*

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

BUGS
       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*.

LINUX
								       1.6.2							     ALEVT-DATE(1)