Arch Linux

jim945

Member

Registered: 2014-12-02

Posts: 4

Add loopback.cfg in archiso

Many distributions use loopbask.cfg to automatically generate menus when launched from an iso image.
https://www.supergrubdisk.org/wiki/Loopback.cfg
Is it possible to add it to archiso?
Here are examples of config
https://github.com/jim945/autoiso-multi … opback.cfg
And the config to run it
https://github.com/jim945/autoiso-multiboot

mpan

Member

Registered: 2012-08-01

Posts: 1,377

Website

Re: Add loopback.cfg in archiso

I don’t really get the idea.

You are not forced to burn ArchISO directly to a CD or a thumbdrive. You can store them as files and normally boot with GRUB in their current state. No third party scripts needed for that.

This is how I use mine:

 $ ls boot/grub/iso/
archlinux-2021.04.01-x86_64.iso  archlinux-2021.07.01-x86_64.iso
archlinux-2021.05.01-x86_64.iso  archlinux-2021.08.01-x86_64.iso
archlinux-2021.06.01-x86_64.iso

 $ cat boot/grub/grub.cfg
set imgdevpath="/dev/disk/by-uuid/2f2ec7ab-1cc0-4f9e-8d6b-4e0ca64592ae"

menuentry 'ArchISO 2021-04-01' {
    set isofile='/boot/grub/iso/archlinux-2021.04.01-x86_64.iso'
    loopback loop $isofile
    search --fs-uuid --set=root 2f2ec7ab-1cc0-4f9e-8d6b-4e0ca64592ae
    echo 'Loading Linux...'
    linux (loop)/arch/boot/x86_64/vmlinuz-linux img_dev=$imgdevpath img_loop=$isofile earlymodules=loop
    echo 'Loading initial ramdisk...'
    initrd (loop)/arch/boot/x86_64/initramfs-linux.img
}

menuentry 'ArchISO 2021-05-01' {
    set isofile='/boot/grub/iso/archlinux-2021.05.01-x86_64.iso'
    loopback loop $isofile
    search --fs-uuid --set=root 2f2ec7ab-1cc0-4f9e-8d6b-4e0ca64592ae
    echo 'Loading Linux...'
    linux (loop)/arch/boot/x86_64/vmlinuz-linux img_dev=$imgdevpath img_loop=$isofile earlymodules=loop
    echo 'Loading initial ramdisk...'
    initrd (loop)/arch/boot/x86_64/initramfs-linux.img
}

menuentry 'ArchISO 2021-06-01' {
    set isofile='/boot/grub/iso/archlinux-2021.06.01-x86_64.iso'
    loopback loop $isofile
    search --fs-uuid --set=root 2f2ec7ab-1cc0-4f9e-8d6b-4e0ca64592ae
    echo 'Loading Linux...'
    linux (loop)/arch/boot/x86_64/vmlinuz-linux img_dev=$imgdevpath img_loop=$isofile earlymodules=loop
    echo 'Loading initial ramdisk...'
    initrd (loop)/arch/boot/x86_64/initramfs-linux.img
}

menuentry 'ArchISO 2021-07-01' {
    set isofile='/boot/grub/iso/archlinux-2021.07.01-x86_64.iso'
    loopback loop $isofile
    search --fs-uuid --set=root 2f2ec7ab-1cc0-4f9e-8d6b-4e0ca64592ae
    echo 'Loading Linux...'
    linux (loop)/arch/boot/x86_64/vmlinuz-linux img_dev=$imgdevpath img_loop=$isofile earlymodules=loop
    echo 'Loading initial ramdisk...'
    initrd (loop)/arch/boot/x86_64/initramfs-linux.img
}

menuentry 'ArchISO 2021-08-01' {
    set isofile='/boot/grub/iso/archlinux-2021.08.01-x86_64.iso'
    loopback loop $isofile
    search --fs-uuid --set=root 2f2ec7ab-1cc0-4f9e-8d6b-4e0ca64592ae
    echo 'Loading Linux...'
    linux (loop)/arch/boot/x86_64/vmlinuz-linux img_dev=$imgdevpath img_loop=$isofile earlymodules=loop
    echo 'Loading initial ramdisk...'
    initrd (loop)/arch/boot/x86_64/initramfs-linux.img
}

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Sometimes I seem a bit harsh — don’t get offended too easily!

jim945

Member

Registered: 2014-12-02

Posts: 4

Re: Add loopback.cfg in archiso

loopback.cfg is available in many ISOs. For example Ubuntu, Mint, Manjaro, etc.
Designed for automatic generating menu without manual editing of configs.

Last edited by jim945 (2021-08-22 21:54:48)

mpan

Member

Registered: 2012-08-01

Posts: 1,377

Website

Re: Add loopback.cfg in archiso

Opening a feature request on the bug tracker for Release Engineering would be the best option to reach people responsible.

Last edited by mpan (2021-08-24 02:57:11)

---

Sometimes I seem a bit harsh — don’t get offended too easily!

jim945

Member

Registered: 2014-12-02

Posts: 4

Re: Add loopback.cfg in archiso

Thanks.
https://bugs.archlinux.org/task/71916?project=6

mpan

Member

Registered: 2012-08-01

Posts: 1,377

Website

Re: Add loopback.cfg in archiso

The feature request misses any references supporting the claim that “This is a standard that has been adopted by several distributions by now.”

---

Sometimes I seem a bit harsh — don’t get offended too easily!

jim945

Member

Registered: 2014-12-02

Posts: 4

Re: Add loopback.cfg in archiso

This is currently the only way to automatically configure liveiso running from a file.  It is confirmed by the presence of the file /boot/grub/loopback.cfg in the images of many distributions.