Check if a pending kernel update requires a reboot to be applied

README.md

@@ -21,6 +21,7 @@ Features:
 - Offers to print the latest Arch Linux news before applying updates (through [curl](https://archlinux.org/packages/core/x86_64/curl/ "curl package") and [htmlq](https://archlinux.org/packages/extra/x86_64/htmlq/ "htmlq package")).
 - Automatic check and listing of orphan packages and offering you to remove them.
 - Helps you processing pacnew/pacsave files (through [pacdiff](https://archlinux.org/packages/extra/x86_64/pacman-contrib/ "pacman-contrib package"), optionally requires [vim](https://archlinux.org/packages/extra/x86_64/vim/ "vim package") as the default [merge program](https://wiki.archlinux.org/title/Pacman/Pacnew_and_Pacsave#pacdiff "pacdiff merge program")).
+- Automatic check for pending kernel updates requiring a reboot to be applied and offers to do so if there's one.
 - Support for both [sudo](https://archlinux.org/packages/core/x86_64/sudo/ "sudo package") and [doas](https://archlinux.org/packages/extra/x86_64/opendoas/ "opendoas package").
 - Optional support for AUR packages update (through [yay](https://aur.archlinux.org/packages/yay "yay AUR package") or [paru](https://aur.archlinux.org/packages/paru "paru AUR package")).
 - Optional support for Flatpak packages update (through [flatpak](https://archlinux.org/packages/extra/x86_64/flatpak "Flatpak package")).
@@ -121,6 +122,10 @@ Additionally `arch-update` will search for pacnew/pacsave files and offers to pr
 
 ![process_pacnew](https://github.com/Antiz96/arch-update/assets/53110319/6f3430f7-fc28-48fa-b107-230f3f32ac5b)
 
+Finally, `arch-update` will check if there's a pending kernel update requiring a reboot to be applied and offers you to do so (if there is):
+
+![kernel_reboot](https://github.com/Antiz96/arch-update/assets/53110319/1eec68c0-e619-44ab-9dd9-74a341f7a5b7)
+
 ## Documentation
 
 ```text
@@ -141,6 +146,7 @@ Exit Codes:
 3  Error when changing icon
 4  User didn't gave the confirmation to proceed
 5  Error when updating the packages
+6  Error when calling the reboot command to apply a pending kernel update
 ```
 
 For more information, see the arch-update(1) man page

doc/man/arch-update.1

@@ -1,4 +1,4 @@
-.TH "ARCH-UPDATE" "1" "November 2023" "Arch-Update v1" "Arch-Update Manual"
+.TH "ARCH-UPDATE" "1" "December 2023" "Arch-Update v1" "Arch-Update Manual"
 
 .SH NAME
 arch-update \- An update notifier/applier for Arch Linux that assists you with important pre/post update tasks. 
@@ -20,7 +20,7 @@ An update notifier/applier for Arch Linux that assists you with important pre/po
 .br
 .RB "Before performing the update, it offers to print the latest Arch Linux news to the user. Arch news that have been published within the last 15 days are tagged as '[NEW]'."
 .br
-.RB "It also checks for orphan packages, unused Flatpak packages and pacnew/pacsave files and, if there are, offers to process them."
+.RB "It also checks for orphan packages, unused Flatpak packages, pacnew/pacsave files and pending kernel update requiring a reboot to be applied and, if there are, offers to process them."
 .br
 .RB "The " "update " "function is launched when you click on the (.desktop) icon."
 .PP
@@ -70,6 +70,10 @@ User didn't gave the confirmation to proceed
 .B 5
 Error when updating the packages
 
+.TP
+.B 6
+Error when calling the reboot command to apply a pending kernel update
+
 .SH USAGE
 .TP
 .B The (.desktop) icon
@@ -130,7 +134,9 @@ sudo sed -i "s/packages=$(checkupdates)/packages=$(checkupdates | awk '{print $1
 .BR echo (1),
 .BR sudo (8),
 .BR doas (1),
-.BR find (1),
+.BR sed (1),
+.BR file (1),
+.BR grep (1),
 .BR curl (1),
 .BR pacman (8),
 .BR pacdiff (8),

src/script/arch-update.sh

@@ -112,6 +112,7 @@ list_packages() {
 		echo -e "No update available\n"
 		orphan_packages
 		pacnew_files
+		kernel_reboot
 		exit 0
 	else
 		icon_updates_available
@@ -206,6 +207,8 @@ update() {
 
 	orphan_packages
 	pacnew_files
+	kernel_reboot
+
 }
 
 # Definition of the orphan_packages function: Print orphan packages and offer to remove them if there are (used in the "list_packages" and "update" functions)
@@ -289,7 +292,33 @@ pacnew_files() {
 	else
 		echo -e "No pacnew file found\n"
 	fi
-
+}
+
+# Definition of the kernel_reboot function: Verify if there's a kernel update waiting for a reboot to be applied
+kernel_reboot() {
+	kernel_compare=$(file /boot/vmlinuz* | sed 's/^.*version\ //' | awk '{print $1}' | grep "$(uname -r)")
+
+	if [ -z "${kernel_compare}" ]; then
+		echo -e "--Reboot required--\nThere's a pending kernel update on your system requiring a reboot to be applied"
+		read -rp $'Would you like to reboot now? [y/N] ' answer
+
+		case "${answer}" in
+			[Yy])
+				echo -e "\nRebooting in 5 seconds...\nPress ctrl+c to abort"
+				sleep 5
+				if ! reboot; then
+					echo -e >&2 "\nAn error has occurred\nThe reboot has been aborted\n" && read -n 1 -r -s -p $'Press \"enter\" to quit\n'
+					exit 6
+				fi
+			;;
+			*)
+				echo -e "\nThe reboot hasn't been performed\nPlease, consider rebooting to finalize the pending kernel update\n"
+			;;
+		esac
+	else
+		echo -e "No pending kernel update found\n"
+	fi
+
 	read -n 1 -r -s -p $'Press \"enter\" to quit\n'
 }