relchk/tpl/sysresccd_grub.conf.j2

#!/bin/sh
# Copy this file to /etc/grub.d/40_custom_sysresccd with mode 0755 and run grub-mkconfig -o /boot/grub/grub.cfg
exec tail -n +3 $0
# System Rescue CD
# Project: https://www.system-rescue.org/
# Details:
# 	https://www.system-rescue.org/manual/Installing_SystemRescue_on_the_disk/#first-approach-using-grub2-with-isoloop
# 	https://www.system-rescue.org/manual/Booting_SystemRescueCd/
submenu 'System Rescue CD' {

	menuentry 'Default options' {
		load_video
		insmod gzio
		insmod part_gpt
		insmod part_msdos
		insmod ext2
		insmod loopback
		search --no-floppy --fs-uuid {{ disk_uuid }} --set=root
		set isofile='{{ iso_path }}'
		set imgdevpath="/dev/disk/by-uuid/{{ disk_uuid }}"
		loopback loop (${root})/${isofile}
		linux (loop)/sysresccd/boot/x86_64/vmlinuz \
			archisobasedir=sysresccd \
			img_dev=${imgdevpath} \
			img_loop=${isofile} \
			earlymodules=loop
		initrd (loop)/sysresccd/boot/intel_ucode.img \
               (loop)/sysresccd/boot/amd_ucode.img \
               (loop)/sysresccd/boot/x86_64/sysresccd.img
	}

	menuentry 'Run from RAM' {
		load_video
		insmod gzio
		insmod part_gpt
		insmod part_msdos
		insmod ext2
		insmod loopback
		search --no-floppy --fs-uuid {{ disk_uuid }} --set=root
		set isofile='{{ iso_path }}'
		set imgdevpath="/dev/disk/by-uuid/{{ disk_uuid }}"
		loopback loop (${root})/${isofile}
		linux (loop)/sysresccd/boot/x86_64/vmlinuz \
				archisobasedir=sysresccd \
				img_dev=${imgdevpath} \
				img_loop=${isofile} \
				earlymodules=loop \
				copytoram
		initrd (loop)/sysresccd/boot/intel_ucode.img \
			   (loop)/sysresccd/boot/amd_ucode.img \
			   (loop)/sysresccd/boot/x86_64/sysresccd.img
	}

	menuentry 'Confirm/verify checksum' {
		load_video
		insmod gzio
		insmod part_gpt
		insmod part_msdos
		insmod ext2
		insmod loopback
		search --no-floppy --fs-uuid {{ disk_uuid }} --set=root
		set isofile='{{ iso_path }}'
		set imgdevpath="/dev/disk/by-uuid/{{ disk_uuid }}"
		loopback loop (${root})/${isofile}
		linux (loop)/sysresccd/boot/x86_64/vmlinuz \
				archisobasedir=sysresccd \
				img_dev=${imgdevpath} \
				img_loop=${isofile} \
				earlymodules=loop \
				checksum
		initrd (loop)/sysresccd/boot/intel_ucode.img \
               (loop)/sysresccd/boot/amd_ucode.img \
               (loop)/sysresccd/boot/x86_64/sysresccd.img
	}

	menuentry 'Use basic display drivers' {
		load_video
		insmod gzio
		insmod part_gpt
		insmod part_msdos
		insmod ext2
		insmod loopback
		search --no-floppy --fs-uuid {{ disk_uuid }} --set=root
		set isofile='{{ iso_path }}'
		set imgdevpath="/dev/disk/by-uuid/{{ disk_uuid }}"
		loopback loop (${root})/${isofile}
		linux (loop)/sysresccd/boot/x86_64/vmlinuz \
				archisobasedir=sysresccd \
				img_dev=${imgdevpath} \
				img_loop=${isofile} \
				earlymodules=loop \
				nomodeset
		initrd (loop)/sysresccd/boot/intel_ucode.img \
               (loop)/sysresccd/boot/amd_ucode.img \
               (loop)/sysresccd/boot/x86_64/sysresccd.img
	}

	menuentry 'Find and boot a locally installed Linux' {
		load_video
		insmod gzio
		insmod part_gpt
		insmod part_msdos
		insmod ext2
		insmod loopback
		search --no-floppy --fs-uuid {{ disk_uuid }} --set=root
		set isofile='{{ iso_path }}'
		set imgdevpath="/dev/disk/by-uuid/{{ disk_uuid }}"
		loopback loop (${root})/${isofile}
		linux (loop)/sysresccd/boot/x86_64/vmlinuz \
				archisobasedir=sysresccd \
				img_dev=${imgdevpath} \
				img_loop=${isofile} \
				earlymodules=loop \
				findroot
		initrd (loop)/sysresccd/boot/intel_ucode.img \
               (loop)/sysresccd/boot/amd_ucode.img \
               (loop)/sysresccd/boot/x86_64/sysresccd.img
	}

	menuentry 'Stop during boot before the root filesystem is mounted' {
		load_video
		insmod gzio
		insmod part_gpt
		insmod part_msdos
		insmod ext2
		insmod loopback
		search --no-floppy --fs-uuid {{ disk_uuid }} --set=root
		set isofile='{{ iso_path }}'
		set imgdevpath="/dev/disk/by-uuid/{{ disk_uuid }}"
		loopback loop (${root})/${isofile}
		linux (loop)/sysresccd/boot/x86_64/vmlinuz \
				archisobasedir=sysresccd \
				img_dev=${imgdevpath} \
				img_loop=${isofile} \
				earlymodules=loop \
				break
		initrd (loop)/sysresccd/boot/intel_ucode.img \
               (loop)/sysresccd/boot/amd_ucode.img \
               (loop)/sysresccd/boot/x86_64/sysresccd.img
	}

}