git.zerfleddert.de Git - m1-debian/blob - files/rc.local

   1 #!/usr/bin/perl
   2
   3 # [x] resize root filesystem
   4 # [x] find root fs uuid
   5 # [x] find boot partition
   6 # [x] generate fstab
   7 # [x] mount /boot/efi
   8 # [x] install grub
   9 # [x] extract wifi firmware
  10 # [ ] on life system skip everything but wifi firmware
  11 # [ ] In order to change the uuid of the root filesystem, bootstrap.sh must remember it in a file within the mounted disk image. And the initrd needs to change it.
  12
  13 my $firmware_tarball = '/boot/efi/linux-firmware.tar';
  14 my $firmware_manifest = '/lib/firmware/ASAHI_FIRMWARE_MANIFEST';
  15
  16 sub
  17 find_root_device
  18 {
  19         open(MOUNT, '<', '/proc/mounts') || die ("Can not open /proc/mounts for reading: $!");
  20         my @lines = <MOUNT>;
  21         close(MOUNT);
  22
  23         for (@lines) {
  24                 if (/^([\S]+)+ \/ /) {
  25                         return $1;
  26                 }
  27         }
  28
  29         die("Could not find root device");
  30 }
  31
  32 sub
  33 find_fs_uuid_of_device
  34 {
  35         my $dev = shift || die;
  36         my $blkid_output = `blkid ${dev}`;
  37
  38         if ($blkid_output =~ /UUID="([^"]+)"/) {
  39                 return $1;
  40         }
  41
  42         die("Could not find fs uuid of $dev");
  43 }
  44
  45 sub
  46 find_efi_parition
  47 {
  48         my $uuid_in_grub_cfg = shift || die;
  49         my @candidates;
  50
  51         my $efi_parition = undef;
  52
  53         for (`blkid`) {
  54                 if (/^([\S]+):.*TYPE="vfat"/) {
  55                         push(@candidates, $1);
  56                 }
  57         }
  58
  59         for my $dev (@candidates) {
  60                 system("mount -o ro $dev /mnt");
  61                         if (-f '/mnt/EFI/boot/grub.cfg') {
  62                                 open(GRUBCFG, '<', '/mnt/EFI/boot/grub.cfg') || die ("Can't open /mnt/EFI/boot/grub.cfg: $!");
  63                                 my @lines = <GRUBCFG>;
  64                                 for (@lines) {
  65                                         if (/${uuid_in_grub_cfg}/) {
  66                                                 $efi_parition = $dev;
  67                                         }
  68                                 }
  69                                 close(GRUBCFG);
  70                         }
  71                 system("umount /mnt");
  72                 last if defined $efi_parition;
  73         }
  74
  75         die ("No efi parition found") unless defined $efi_parition;
  76
  77         return $efi_parition;
  78 }
  79
  80 sub
  81 generate_fstab
  82 {
  83         my $root_fs_uuid = shift || die;
  84         my $efi_fs_uuid = shift || die;
  85
  86         open(FSTAB, '>', '/etc/fstab') || die ("Can not open fstab");
  87         print FSTAB <<EOF;
  88
  89 UUID="$root_fs_uuid" /         ext4 defaults 0 0
  90 UUID="$efi_fs_uuid"  /boot/efi vfat defaults 0 0
  91 EOF
  92         close(FSTAB);
  93 }
  94
  95 sub
  96 install_grub
  97 {
  98         system('apt-get install -y grub-efi-arm64-signed-');
  99         system("echo 'grub-efi-arm64 grub2/update_nvram boolean false' | debconf-set-selections");
 100         system("echo 'grub-efi-arm64 grub2/force_efi_extra_removable boolean true' | debconf-set-selections");
 101         system("dpkg-reconfigure -fnoninteractive grub-efi-arm64");
 102 }
 103
 104 sub
 105 update_wifi_firmware_if_necessary
 106 {
 107         return unless -f $firmware_tarball;
 108
 109         if (-f $firmware_manifest) {
 110                 system("sha256sum -c $firmware_manifest --quiet");
 111                 return if $? == 0;
 112         }
 113
 114         system("sha256sum $firmware_tarball > $firmware_manifest");
 115         system("tar -C /lib/firmware/ -xf $firmware_tarball");
 116
 117         system('rmmod brcmfmac');
 118         system('rmmod brcmutil');
 119         sleep(1);
 120         system('modprobe brcmfmac');
 121         sleep(1);
 122         system('rmmod brcmfmac');
 123         sleep(1);
 124         system('modprobe brcmfmac');
 125 }
 126
 127 my $root_block_device = undef;
 128 my $root_fs_uuid = undef;
 129 my $efi_block_device = undef;
 130 my $efi_fs_uuid = undef;
 131
 132 unless (-f '/etc/fstab') {
 133         $root_block_device = find_root_device();
 134         system("resize2fs $root_block_device");
 135         $root_fs_uuid = find_fs_uuid_of_device($root_block_device);
 136         $efi_block_device = find_efi_parition($root_fs_uuid);
 137         $efi_fs_uuid = find_fs_uuid_of_device($efi_block_device);
 138         generate_fstab($root_fs_uuid, $efi_fs_uuid);
 139         system('mount /boot/efi');
 140         install_grub();
 141 }
 142
 143 update_wifi_firmware_if_necessary();