zsh + coreutils + unclutter + amixer + xterm (Arch Linux)
Saya mengambil jawabannya oleh @TheDoctor dan berlari dengannya. Versi ini memiliki banyak peningkatan, dan 99% meyakinkan untuk pengguna berpengalaman (saya) di sistem Linux Arch saya. Saya menggunakan Zsh karena memiliki array yang baik dan dukungan angka floating-point.
Ketergantungan: feh, unclutter, amixer, zsh, xterm
Perbaikan:
1) Gunakan nomor yang dicetak di kolom pertama oleh dmesg, yang merupakan waktu sejak boot, (misalnya [0,000000]) untuk menentukan waktu tidur. Tanpa ini, ini terlihat sangat tidak realistis pada mesin saya. Waktu ini diuraikan sebelum loop (dalam panggilan awal untuk tidur) karena penguraian di dalam loop terlalu lambat.
2) Jangan cetak garis di mana waktu sejak boot lebih besar dari 16 detik. Nomor khusus ini bergantung pada mesin, tetapi intinya adalah untuk menghindari pencetakan nanti dmesg-hal yang berasal dari memasukkan / melepas stik usb, dll. Dan tidak terkait dengan booting.
3) Lakukan semua ini di jendela terminal layar penuh dengan latar belakang hitam dan teks putih. Kudos to Mechanical Snail untuk trik ini digunakan dalam: Membuat gambar PNG dengan "Hello World!" dengan pemrograman API, dalam kode sesingkat mungkin
4) Bungkam audio saat mati, kembalikan volume ketika skrip selesai.
5) Sembunyikan kursor mouse, pulihkan saat skrip selesai.
6) Tampilkan layar splash BIOS dan Syslinux.
Jalankan dengan: xterm -fu -fg putih -bg hitam -e '/ usr / bin / zsh fake-reboot.sh'
Kode:
#!/usr/bin/zsh
# Remove (undisplay) the mouse pointer
unclutter -idle 0 -jitter 255 &
# Since there is no easily-accessible (i.e. without being root) shutdown log, we
# fake these messages.
echo "The system is going down for maintenance NOW."
sleep 2.0
echo "[21656.404742] systemd[1]: Shutting down."
echo "[21656.404742] systemd[1]: Stopping Session 1 of user `id -u -n`."
echo "[21656.404742] systemd[1]: Stopped Session 1 of user `id -u -n`."
echo "[21656.404742] systemd[1]: Stopping Sound Card."
# For added effect, store volume and then mute sound
volume=`amixer -- sget Master | awk -F'[][]' 'END{print $2}'`
amixer -- sset Master 0% &> /dev/null
echo "[21656.404742] systemd[1]: Stopped target Sound Card."
sleep 0.5
echo "[21656.919792] systemd[1]: Stopping system-systemd\x2dfsck.slice."
echo "[21656.919792] systemd[1]: Removed slice system-systemd\x2dfsck.slice."
echo "[21656.919792] systemd[1]: Stopping system-netctl\x2difplugd.slice."
echo "[21656.919793] systemd[1]: Removed slice system-netctl\x2difplugd.slice."
echo "[21656.919793] systemd[1]: Stopping User Manager for UID `id -u`..."
sleep 0.7
echo "[21657.624741] systemd[1]: Stopping Graphical Interface."
echo "[21657.624742] systemd[1]: Stopped target Graphical Interface."
echo "[21657.624745] systemd[1]: Stopping Multi-User System."
sleep 0.9
echo "[21658.606561] systemd[1]: Stopped target Multi-User System."
echo "[21658.606562] systemd[1]: Stopping Paths."
echo "[21658.606562] systemd[1]: Stopped D-Bus System Message Bus."
echo "[21658.606562] systemd[1]: Stopped target Paths."
echo "[21658.606568] systemd[1]: Stopping Timers."
echo "[21658.606568] systemd[1]: Stopped target Timers."
echo "[21658.606568] systemd[1]: Stopping Sockets."
echo "[21658.606568] systemd[1]: Stopped target Sockets."
echo "[21658.606568] systemd[1]: Starting Shutdown."
echo "[21658.606571] systemd[1]: Reached target Shutdown."
echo "[21658.606571] systemd[1]: Starting Exit the Session..."
echo "[21658.606571] systemd[1]: Received SIGRTMIN+26 from PID 10988 (kill)."
echo "[21658.606571] systemd[1]: Deactivated swap."
sleep 0.4
echo "[21659.001741] systemd[1]: Starting Unmount All Filesystems."
echo "[21659.001742] systemd[1]: Unmounted /home."
echo "[21659.001742] systemd[1]: Reached target Unmount All Filesystems."
echo "[21659.001742] systemd[1]: Stopping Remount Root and Kernel File Systems..."
echo "[21659.001742] systemd[1]: Stopped Remount Root and Kernel File Systems."
echo "[21659.001743] systemd[1]: Reached target Shutdown."
echo "[21659.001743] systemd[1]: Starting Final Step."
echo "[21659.001743] systemd[1]: Reached target Final Step."
echo "[21659.001754] systemd[1]: Shutting down."
sleep 0.3
echo "[21659.304341] systemd-journal[250]: Journal stopped"
sleep 0.2
echo "System halted."
sleep 2
clear
sleep 1
# Get the BIOS splash screen and display it
wget http://pvv.ntnu.no/~asmunder/bios.jpg &> /dev/null
feh -Z -x -F -N --force-aliasing bios.jpg &
pid=$! # Store PID of Feh, so we can kill it later
# While showing the BIOS splash, use the time to parse dmesg output into arrays
tim=`dmesg | awk '{print $2}' | sed 's/]//' | grep "[0-9][0-9][0-9][0-9][0-9]"`
tim=($=tim)
dmsg=("${(@f)$(dmesg)}")
sleep 2.5
kill $pid
sleep 0.5
# Get the Syslinux splash and display it
wget http://pvv.ntnu.no/~asmunder/syslinux.png &> /dev/null
feh -Z -x -F -N --force-aliasing syslinux.png &
pid=$!
sleep 1.3
kill $pid
# Loop through the arrays we created. Calculate the time we have to wait before
# displaying this line. If the wait time is less than 0.1 sec, we skip waiting.
T1=0.0
T2=0.0
n=0
for d in $dmsg; do
T1=$T2
T2=${tim[$n]}
((dT = $T2-$T1))
if (( $dT > 0.1));then
sleep $dT
fi
echo $d
if (( $T2 > 16.0 )); then
break
fi
((n=$n+1))
done
sleep 1
clear
# It's normally agetty that parses /etc/issue and handles escape codes in a
# special way. Thus we skip the first line of /etc/issue and do that manually.
echo "Arch Linux "`uname -r`" (tty1)"
tail -n +2 /etc/issue
echo `hostname`" login:"
sleep 10
# Reset the mouse pointer so it is visible again
unclutter -idle 5 -jitter 0 &
# Reset the audio volume
amixer -- sset Master $volume &> /dev/null