Add script to change runlevel

recipes-core/fastinit/chlevel.1

+.TH CHLEVEL 1 "November 2024" "Version 0.1" "General Commands Manual"
+.SH NAME
+chlevel.sh \- change fastinit runlevel
+.SH SYNOPSIS
+.B /usr/sbin/chlevel.sh
+\fIrunlevel\fP
+.SH DESCRIPTION
+
+Chlevel.sh remounts the boot filesystem, edit the kernel command line to change the runlevel and restart the system.
+
+.SH SEE ALSO
+.BR runlevel (8),
+.BR fastinit (8),
+.BR mount (8)
+
+.SH AUTHOR
+The 
+.B chlevel
+script was first written by Qiyang Sun <qs2g22@soton.ac.uk>, and is maintained by the MAR24 project maintainers.

recipes-core/fastinit/files/chlevel.sh

+#!/bin/sh
+
+runlevel=$1
+
+case $runlevel in
+	1)
+		mount -o rw,remount /boot
+		cat > /boot/cmdline.txt <<EOF
+quiet loglevel=0 dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait  logo.nologo net.ifnames=0 modules.load=dwc2,g_serial init=/usr/sbin/fastinit.sh 1
+EOF
+		reboot -f
+		;;
+	2)
+		mount -o rw,remount /boot
+		cat > /boot/cmdline.txt <<EOF
+quiet loglevel=0 dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait  logo.nologo net.ifnames=0 modules.load=dwc2,g_serial init=/usr/sbin/fastinit.sh 2
+EOF
+		reboot -f
+		;;
+	3)
+		mount -o rw,remount /boot
+		cat > /boot/cmdline.txt <<EOF
+dwc_otg.lpm_enable=0 console=serial0,115200 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait  logo.nologo net.ifnames=0 modules.load=dwc2,g_serial earlycon=uart8250,mmio32,0x20215040 init=/usr/sbin/fastinit.sh 3
+EOF
+		reboot -f
+		;;
+	5)
+		mount -o rw,remount /boot
+		cat > /boot/cmdline.txt <<EOF
+dwc_otg.lpm_enable=0 console=serial0,115200 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait  logo.nologo net.ifnames=0 modules.load=dwc2,g_serial earlycon=uart8250,mmio32,0x20215040 init=/usr/sbin/fastinit.sh 5
+EOF
+		reboot -f
+		;;
+	*)
+		echo "Invalid new runlevel"
+		;;
+esac
+