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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 | 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 $efi_fs_uuid = shift || die; | |
86 | ||
87 | open(FSTAB, '>', '/etc/fstab') || die ("Can not open fstab"); | |
88 | print FSTAB <<EOF; | |
89 | ||
90 | UUID="$root_fs_uuid" / ext4 defaults 0 0 | |
91 | UUID="$efi_fs_uuid" /boot/efi vfat defaults 0 0 | |
92 | EOF | |
93 | close(FSTAB); | |
94 | } | |
95 | ||
96 | sub | |
97 | install_grub | |
98 | { | |
99 | system('apt-get install -y grub-efi-arm64-signed-'); | |
100 | system("echo 'grub-efi-arm64 grub2/update_nvram boolean false' | debconf-set-selections"); | |
101 | system("echo 'grub-efi-arm64 grub2/force_efi_extra_removable boolean true' | debconf-set-selections"); | |
102 | system("dpkg-reconfigure -fnoninteractive grub-efi-arm64"); | |
103 | system("update-grub"); | |
104 | } | |
105 | ||
106 | sub | |
107 | update_wifi_firmware_if_necessary | |
108 | { | |
109 | return unless -f $firmware_tarball; | |
110 | ||
111 | if (-f $firmware_manifest) { | |
112 | system("sha256sum -c $firmware_manifest --quiet"); | |
113 | return if $? == 0; | |
114 | } | |
115 | ||
116 | system("sha256sum $firmware_tarball > $firmware_manifest"); | |
117 | system("tar -C /lib/firmware/ -xf $firmware_tarball"); | |
118 | ||
119 | system('rmmod brcmfmac'); | |
120 | system('rmmod brcmutil'); | |
121 | sleep(1); | |
122 | system('modprobe brcmfmac'); | |
123 | sleep(1); | |
124 | system('rmmod brcmfmac'); | |
125 | sleep(1); | |
126 | system('modprobe brcmfmac'); | |
127 | } | |
128 | ||
129 | my $root_block_device = undef; | |
130 | my $root_fs_uuid = undef; | |
131 | my $efi_block_device = undef; | |
132 | my $efi_fs_uuid = undef; | |
133 | ||
134 | unless (-f '/etc/fstab') { | |
135 | $root_block_device = find_root_device(); | |
136 | system("resize2fs $root_block_device"); | |
137 | $root_fs_uuid = find_fs_uuid_of_device($root_block_device); | |
138 | $efi_block_device = find_efi_parition($root_fs_uuid); | |
139 | $efi_fs_uuid = find_fs_uuid_of_device($efi_block_device); | |
140 | generate_fstab($root_fs_uuid, $efi_fs_uuid); | |
141 | system('mount /boot/efi'); | |
142 | install_grub(); | |
143 | } | |
144 | ||
145 | update_wifi_firmware_if_necessary(); |