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 # [x] change uuid of ext4
  12
  13 my $firmware_tarball = '/boot/efi/linux-firmware.tar';
  14 my $firmware_manifest = '/lib/firmware/ASAHI_FIRMWARE_MANIFEST';
  15 my $grubcfg = '/mnt/EFI/debian/grub.cfg';
  16
  17 sub
  18 find_root_device
  19 {
  20         open(MOUNT, '<', '/proc/mounts') || die ("Can not open /proc/mounts for reading: $!");
  21         my @lines = <MOUNT>;
  22         close(MOUNT);
  23
  24         for (@lines) {
  25                 if (/^([\S]+)+ \/ /) {
  26                         return $1;
  27                 }
  28         }
  29
  30         die("Could not find root device");
  31 }
  32
  33 sub
  34 find_fs_uuid_of_device
  35 {
  36         my $dev = shift || die;
  37         my $blkid_output = `blkid ${dev}`;
  38
  39         if ($blkid_output =~ /UUID="([^"]+)"/) {
  40                 return $1;
  41         }
  42
  43         die("Could not find fs uuid of $dev");
  44 }
  45
  46 sub
  47 find_efi_parition
  48 {
  49         my $uuid_in_grub_cfg = shift || die;
  50         my @candidates;
  51
  52         my $efi_parition = undef;
  53
  54         for (`blkid`) {
  55                 if (/^([\S]+):.*TYPE="vfat"/) {
  56                         push(@candidates, $1);
  57                 }
  58         }
  59
  60         for my $dev (@candidates) {
  61                 system("mount -o ro $dev /mnt");
  62                         if (-f $grubcfg) {
  63                                 open(GRUBCFG, '<', $grubcfg) || die ("Can't open $grubcfg: $!");
  64                                 my @lines = <GRUBCFG>;
  65                                 for (@lines) {
  66                                         if (/${uuid_in_grub_cfg}/) {
  67                                                 $efi_parition = $dev;
  68                                         }
  69                                 }
  70                                 close(GRUBCFG);
  71                         }
  72                 system("umount /mnt");
  73                 last if defined $efi_parition;
  74         }
  75
  76         die ("No efi parition found") unless defined $efi_parition;
  77
  78         return $efi_parition;
  79 }
  80
  81 sub
  82 generate_fstab
  83 {
  84         my $root_fs_uuid = shift || die;
  85         my $efi_fs_uuid = shift || die;
  86
  87         open(FSTAB, '>', '/etc/fstab') || die ("Can not open fstab");
  88         print FSTAB <<EOF;
  89 UUID="$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         system("update-grub");
 103 }
 104
 105 sub
 106 update_wifi_firmware_if_necessary
 107 {
 108         return unless -f $firmware_tarball;
 109
 110         if (-f $firmware_manifest) {
 111                 system("sha256sum -c $firmware_manifest --quiet");
 112                 return if $? == 0;
 113         }
 114
 115         system("sha256sum $firmware_tarball > $firmware_manifest");
 116         system("tar -C /lib/firmware/ -xf $firmware_tarball");
 117
 118         system('rmmod brcmfmac');
 119         system('rmmod brcmutil');
 120         sleep(1);
 121         system('modprobe brcmfmac');
 122         sleep(1);
 123         system('rmmod brcmfmac');
 124         sleep(1);
 125         system('modprobe brcmfmac');
 126 }
 127
 128 my $root_block_device = undef;
 129 my $initial_root_fs_uuid = undef;
 130 my $final_root_fs_uuid = undef;
 131 my $efi_block_device = undef;
 132 my $efi_fs_uuid = undef;
 133
 134 unless (-f '/boot/grub/grub.cfg') {
 135         $root_block_device = find_root_device();
 136         system("resize2fs $root_block_device");
 137         $initial_root_fs_uuid = find_fs_uuid_of_device($root_block_device);
 138         $efi_block_device = find_efi_parition($initial_root_fs_uuid);
 139         $efi_fs_uuid = find_fs_uuid_of_device($efi_block_device);
 140         system("tune2fs -U random ${root_block_device}");
 141         $final_root_fs_uuid = find_fs_uuid_of_device($root_block_device);
 142         generate_fstab($final_root_fs_uuid, $efi_fs_uuid);
 143         system('mount /boot/efi');
 144         install_grub();
 145 }
 146
 147 update_wifi_firmware_if_necessary();