ALEVT-DATE(1)

✨ alevt-date(1) — Teletext time ✨

Okay so bestie, this is the manual for alevt-date 🎀, the NAME part of the page is literally just: alevt-date - display/set time received via Teletext 🦋

💖 NAME 💖

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

🌸 SYNOPSIS 🌸

alevt-date [options]

🔥 DESCRIPTION 🔥

Okay so alevt-date is giving time-reading from Teletext ✨ It grabs the time that comes through a Teletext source and shows it to you, and it can even set your system time with it 💅 The date itself isn't really interpreted (it's not even sent on most channels, ngl 😭), so the only adjustment you can make is +/-12 hours 🙈 By default the allowed adjustment is capped at +/-2 hours, but you can change that with -delta 💜 If you don't use -set, it just displays the date in the same format as the date(1) command 🌈

👑 OPTIONS 👑

A quick summary of the options is below, bestie 🫶

• -set — Sets the system time from whatever time comes in via Teletext 💖
• -delta seconds — The max adjustment allowed for the system time 🎀 Default is 7200 seconds (2 hours), and the biggest you can give it is 12 hours 💅
• -format string — The format string used to print the time ✨ For the control sequences you can use, look at strftime(3) 🦋
• -vbi device — Picks the device to use 🌸 Default: /dev/vbi, /dev/vbi0, /dev/video0, /dev/dvb/adapter0/demux0, tried in that order 🧚
• -timeout seconds — If the time can't be detected within seconds, the program gets terminated with a SIGALRM 😭
• -progname name — Sets the program name if you're using the DVB interface 📺
• -pid pid — Sets the teletext PID if you're using the DVB interface 🔥
• --help — Shows the summary of options 🙈
• --version — Shows the version of the program 💜

Before you start this program, you have to set the TV channel with another program, like xawtv or set-tv 📺 That step is non-negotiable, periodt 💅

Note: On Linux, this program does not set the battery backed up clock of your computer 💀 If you want to do that, hwclock -w will handle it 🫶

The -progname or -pid option specifies the program or teletext PID when you're using the DVB interface 🌈 If you use neither of them, alevt outputs info about the currently accessible streams and uses the first of those PIDs as the default ✨ That output includes the PIDs and names you can feed into -progname or -pid, based on the TV channel you've currently got selected 🦋

📂 FILES 📂

• /dev/vbi*
• /dev/dvb/adapter*/demux*

🔗 SEE ALSO 🔗

alevt(1x), alevt-cap(1), strftime(3), date(1), hwclock(8) 🧚

🐛 BUGS 🐛

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

Bug reports go to <https://gitlab.com/alevt/alevt> 🌸

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Bye bestie, this was the alevt-date(1) manual from LINUX 1.8.3 💅✨