Testing release
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toloveru
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README.md
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README.md
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# kernelcheck
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# Introduction
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Ever thought of compiling a custom kernel, but held back because of the need for manual tracking, compilation and installation? Well, I say no more. This tool can do it for you.
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# What does it do?
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* Periodically check for updates on kernel.org
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* Download a new kernel if available
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* Verify the kernel signature
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* Compile and install the kernel
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* Nofity the users about what is going on (tested only on Xfce).
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* Remove a distribution kernel if present (currently only on Arch and Manjaro).
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# This script runs as root. Isn't that unsafe?
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In a non-interactive script, it's much easier to run priveleged by default and drop priveleges as needed, instead of requiring authentication every time. If you have a fully non-interactive way of achieving this though, feel free to open a pull request.
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# I want to use this code in my own projects. What license do you use?
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This work is licensed under the CC BY-NC 4.0 license, which you can read more about [here](https://creativecommons.org/licenses/by-nc/4.0/legalcode).
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In a nutshell, this means:
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* You can copy and redistribute the material in any medium or format.
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* You can remix, transform, and build upon the material.
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Provided that:
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* You give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggest the licensor endorses you or your use.
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* You do not use the material for commercial purposes.
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# Contact me
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If you have any questions, encountered bugs, feature requests, etc. about this project, please send me a message at facebook.com/irc.condor, and I'll get back to you as soon as possible.
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If you find this an interesting project, consider following me there also!
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9
install
Normal file
9
install
Normal file
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#!/bin/sh
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sudo cp -v kernelcheck /usr/local/sbin/kernelcheck
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sudo cp -v notify_all /usr/local/sbin/notify_all
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printf "Adding hourly service to cron scheduler..\n"
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(sudo crontab -l; echo "@hourly /usr/local/sbin/kernelcheck" ) | sudo crontab -
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printf "Enabling cronie scheduler..\n" # Let me know if you use something else, and enable manually.
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sudo systemctl start cronie.service
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sudo systemctl enable cronie.service
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printf "Installation complete.\n"
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87
kernelcheck
Executable file
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kernelcheck
Executable file
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#!/bin/sh
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# Variables
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latest="$(wget -qO - 'https://kernel.org' | sed -n '/stable:/{n;p;}' | sed 's.[a-z]\|<\|>\|/\|[[:space:]]..g')"
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current="$(uname -r)"
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user="$(users)"
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cores=$(nproc)
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# Function body
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function verify(){
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local sign=$1 out=
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gkh="647F28654894E3BD457199BE38DBBDC86092693E" # Kroah-Hartman's key
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lt="ABAF11C65A2970B130ABE3C479BE3E4300411886" # Torvalds' key
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if out=$(sudo -u $user gpg --status-fd 1 --verify "$sign" 2>/dev/null) && echo "$out" | grep -qs "^\[GNUPG:\] VALIDSIG $gkh"
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then
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return 0
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elif out=$(sudo -u $user gpg --status-fd 1 --verify "$sign" 2>/dev/null) && echo "$out" | grep -qs "^\[GNUPG:\] VALIDSIG $lt"
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then
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return 0
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else
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echo "$out" >&2
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return 1
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fi
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}
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if [[ "$latest" != "$current" ]] && [[ ! -z $latest ]]
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then
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/usr/local/sbin/notify_all "Kernel update tracker" "There's a new kernel available\!\nGetting the kernel for you.." --icon=dialog-information
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download="$(wget -qO - 'https://kernel.org' | sed -n '/latest_link/{n;p;}' | cut -d '"' -f2)"
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sudo -u $user wget -qP /tmp $download
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sudo -u $user wget -qP /tmp $(sed 's/.xz/.sign/' <<< $download)
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/usr/local/sbin/notify_all "Kernel update tracker" "Kernel downloaded\!\nNow extracting and verifying." --icon=dialog-information
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sudo -u $user unxz /tmp/linux-$latest.tar.xz
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if verify /tmp/linux-$latest.tar.sign
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then
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/usr/local/sbin/notify_all "Kernel update tracker" "Verification success\!\nStarting compilation.." --icon=dialog-information
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else
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/usr/local/sbin/notify_all "Kernel update tracker" "Couldn't verify the kernel. Quitting\!" --icon=dialog-warning
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exit 1
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fi
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tar xf /tmp/linux-$latest.tar
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cd /tmp/linux-$latest
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make clean &>/dev/null
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make mrproper &>/dev/null
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if [ -f "/root/.config/kernel/.config" ]
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then
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cp /root/.config/kernel/.config /tmp/linux-$latest/.config
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else
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/usr/local/sbin/notify_all "Kernel update tracker" "No config file found\!\nAdd it to /root/.config/kernel/.config" --icon=dialog-warning
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exit 1
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fi
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/usr/local/sbin/notify_all "Kernel update tracker" "Starting kernel build..\nThis can take a while."
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make -j$cores &>/dev/null
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make modules_install &>/dev/null
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cp arch/$(uname -m)/boot/bzImage /boot/vmlinuz-$latest
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mkinitcpio -k $latest -g /boot/initramfs-$latest.img &>/dev/null
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if [ "$(echo $(uname -r) | sed 's/ARCH//')" != "$(uname -r)" ]
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then
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/usr/local/sbin/notify_all "Kernel update tracker" "Removing the Arch distribution kernel.." --icon=dialog-information
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pacman -R --noconfirm linux
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elif [ "$(echo $(uname -r) | sed 's/MANJARO//')" != "$(uname -r)" ]
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then
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/usr/local/sbin/notify_all "Kernel update tracker" "Removing the Manjaro distribution kernel.." --icon=dialog-information
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pacman -R --noconfirm linux
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else
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/usr/local/sbin/notify_all "Kernel update tracker" "Removing the current kernel.." --icon=dialog-information
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rm -f /boot/initramfs-$current.img
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rm -f /boot/vmlinuz-$current
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rm -rf /usr/lib/modules/$current
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fi
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grub-mkconfig -o /boot/grub/grub.cfg &>/dev/null
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/usr/local/sbin/notify_all "Kernel update tracker" "New kernel installed\!" --icon=dialog-information
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elif [[ "$latest" == "$current" ]] && [[ ! -z $latest ]]
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then
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exit 0
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elif [[ -z $latest ]]
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then
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if ncat -zw1 kernel.org 443
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then
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/usr/local/sbin/notify_all "Kernel update tracker" "Website didn't return the required data." --icon=dialog-warning
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else
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/usr/local/sbin/notify_all "Kernel update tracker" "No network connection." --icon=dialog-information
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fi
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else
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/usr/local/sbin/notify_all "Kernel update tracker" "Internal error.. Debug time\!" --icon=dialog-warning
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exit 1
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fi
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13
notify_all
Executable file
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notify_all
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#!/bin/sh
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PATH=/usr/bin
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XUSERS=($(who|egrep "\(:[0-9](\.[0-9])*\)"|awk '{print $1$5}'|sort -u))
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for XUSER in $XUSERS; do
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NAME=(${XUSER/(/ })
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DISPLAY=${NAME[1]/)/}
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DBUS_ADDRESS=unix:path=/run/user/$(id -u ${NAME[0]})/bus
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sudo -u ${NAME[0]} DISPLAY=${DISPLAY} \
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DBUS_SESSION_BUS_ADDRESS=${DBUS_ADDRESS} \
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PATH=${PATH} \
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notify-send "$@"
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done
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