#!/usr/bin/perl my $firmware_tarball = '/boot/efi/vendorfw/firmware.tar'; my $firmware_manifest = '/lib/firmware/ASAHI_FIRMWARE_MANIFEST'; my $grubcfg = '/mnt/EFI/debian/grub.cfg'; sub find_root_device { open(MOUNT, '<', '/proc/mounts') || die ("Can not open /proc/mounts for reading: $!"); my @lines = <MOUNT>; close(MOUNT); for (@lines) { if (/^([\S]+)+ \/ /) { return $1; } } die("Could not find root device"); } sub find_fs_uuid_of_device { my $dev = shift || die; my $blkid_output = `blkid ${dev}`; if ($blkid_output =~ /UUID="([^"]+)"/) { return $1; } die("Could not find fs uuid of $dev"); } sub find_efi_parition { my $uuid_in_grub_cfg = shift || die; my @candidates; my $efi_parition = undef; for (`blkid`) { if (/^([\S]+):.*TYPE="vfat"/) { push(@candidates, $1); } } for my $dev (@candidates) { system("mount -o ro $dev /mnt"); if (-f $grubcfg) { open(GRUBCFG, '<', $grubcfg) || die ("Can't open $grubcfg: $!"); my @lines = <GRUBCFG>; for (@lines) { if (/${uuid_in_grub_cfg}/) { $efi_parition = $dev; } } close(GRUBCFG); } system("umount /mnt"); last if defined $efi_parition; } die ("No efi parition found") unless defined $efi_parition; return $efi_parition; } sub generate_fstab { my $root_fs_uuid = shift || die; my $efi_fs_uuid = shift || die; open(FSTAB, '>', '/etc/fstab') || die ("Can not open fstab"); print FSTAB <<EOF; UUID="$root_fs_uuid" / ext4 defaults 0 0 UUID="$efi_fs_uuid" /boot/efi vfat defaults 0 0 EOF close(FSTAB); } sub install_grub { system('rm -rf /boot/efi/EFI'); system('apt-get install -y grub-efi-arm64-signed-'); system("echo 'grub-efi-arm64 grub2/update_nvram boolean false' | debconf-set-selections"); system("echo 'grub-efi-arm64 grub2/force_efi_extra_removable boolean true' | debconf-set-selections"); system('dpkg-reconfigure -fnoninteractive grub-efi-arm64'); system('update-grub'); system('grub-install --removable /boot/efi'); } sub update_wifi_firmware_if_necessary { return unless -f $firmware_tarball; if (-f $firmware_manifest) { system("sha256sum -c $firmware_manifest --quiet"); return if $? == 0; } system("sha256sum $firmware_tarball > $firmware_manifest"); system("tar -C /lib/firmware/ -xf $firmware_tarball"); unlink('/etc/modprobe.d/blacklist.conf'); system('modprobe brcmfmac'); } my $root_block_device = undef; my $initial_root_fs_uuid = undef; my $efi_block_device = undef; my $efi_fs_uuid = undef; unless (-f '/boot/grub/grub.cfg') { $root_block_device = find_root_device(); system("resize2fs $root_block_device"); $initial_root_fs_uuid = find_fs_uuid_of_device($root_block_device); $efi_block_device = find_efi_parition($initial_root_fs_uuid); $efi_fs_uuid = find_fs_uuid_of_device($efi_block_device); generate_fstab($initial_root_fs_uuid, $efi_fs_uuid); system('mount /boot/efi'); install_grub(); } update_wifi_firmware_if_necessary();