code.delx.au - monosys/blob - multiboot-setup

   1 #!/bin/bash
   2
   3 set -eu
   4
   5 PARTITION_LABEL="multiboot"
   6 MULTIBOOT_MNT="/mnt/multiboot"
   7 SYSLINUX_VERSION="6.03"
   8 SYSLINUX_URL="https://www.kernel.org/pub/linux/utils/boot/syslinux/syslinux-${SYSLINUX_VERSION}.tar.gz"
   9
  10 function cmd_format {
  11     if [ ! -b "${1:-}" ]; then
  12         echo "Usage: $0 format /dev/sdX"
  13         exit 1
  14     fi
  15     set -x
  16
  17     sudo -k
  18     DISK_DEVICE="$1"
  19     PARTITION_DEVICE="${DISK_DEVICE}1"
  20     echo -ne 'label: dos\ntype=c, bootable\n' | sudo sfdisk "$DISK_DEVICE"
  21     sudo mkfs.vfat -n "$PARTITION_LABEL" "$PARTITION_DEVICE"
  22 }
  23
  24 function cmd_bootloader {
  25     DISK_DEVICE="$(mount|grep /mnt/multiboot|cut -d' ' -f1|sed 's/[0-9]*$//')"
  26     if [ ! -b "$DISK_DEVICE" ]; then
  27         echo "ERROR! Could not find disk to install bootloader. Try using mount."
  28         exit 1
  29     fi
  30     set -x
  31
  32     sudo -k
  33     install_grub_bios
  34     install_grub_efi
  35 }
  36
  37 function install_grub_bios {
  38     sudo grub-install \
  39         --target=i386-pc \
  40         --boot-directory="$MULTIBOOT_MNT" \
  41         "$DISK_DEVICE"
  42 }
  43
  44 function install_grub_efi {
  45     for arch in i386-efi x86_64-efi; do
  46         sudo grub-install \
  47             --target="$arch" \
  48             --no-nvram \
  49             --removable \
  50             --efi-directory="$MULTIBOOT_MNT" \
  51             --boot-directory="$MULTIBOOT_MNT" \
  52             "$DISK_DEVICE"
  53     done
  54 }
  55
  56 function cmd_mount {
  57     set -x
  58
  59     PARTITION_DEVICE="$(readlink -f /dev/disk/by-label/multiboot)"
  60     sudo mkdir -p "$MULTIBOOT_MNT"
  61     while sudo umount "$PARTITION_DEVICE" &> /dev/null; do true; done
  62     sudo mount "$PARTITION_DEVICE" "$MULTIBOOT_MNT" -o "uid=$(whoami)"
  63 }
  64
  65 function cmd_umount {
  66     set -x
  67
  68     sudo umount "$MULTIBOOT_MNT"
  69     sudo rmdir "$MULTIBOOT_MNT"
  70 }
  71
  72 function cmd_add_iso {
  73     if [ ! -f "${MULTIBOOT_MNT}/$(basename "${1:-}")" ]; then
  74         echo "Usage: $0 add_iso ${MULTIBOOT_MNT}/ubuntu.iso"
  75         exit 1
  76     fi
  77     set -x
  78
  79     ISO_BASENAME="$(basename "$1")"
  80     GRUB_PART_CFG="${MULTIBOOT_MNT}/grub/parts/${ISO_BASENAME}"
  81
  82     mkdir -p "$(dirname "$GRUB_PART_CFG")"
  83
  84     if [[ "$ISO_BASENAME" == ubuntu-*-desktop-*.iso ]]; then
  85         setup_ubuntu
  86     elif [[ "$ISO_BASENAME" == debian-live-*.iso ]]; then
  87         setup_debian
  88     elif [[ "$ISO_BASENAME" == Fedora-Workstation-Live-*.iso ]]; then
  89         setup_fedora
  90     elif [[ "$ISO_BASENAME" == archlinux-*.iso ]]; then
  91         setup_archlinux
  92     elif [[ "$ISO_BASENAME" == FD12*.zip ]]; then
  93         setup_freedos
  94     else
  95         echo "Unsupported ISO! $ISO_BASENAME"
  96     fi
  97
  98     delete_stray_grub_parts
  99     print_grub_cfg > "${MULTIBOOT_MNT}/grub/grub.cfg"
 100 }
 101
 102 function setup_ubuntu {
 103     cat <<EOT > "$GRUB_PART_CFG"
 104 menuentry '$ISO_BASENAME' {
 105   loopback loop /$ISO_BASENAME
 106   linux (loop)/casper/vmlinuz.efi boot=casper quiet iso-scan/filename=/$ISO_BASENAME
 107   initrd (loop)/casper/initrd.lz
 108 }
 109
 110 EOT
 111 }
 112
 113 function setup_debian {
 114     cat <<EOT > "$GRUB_PART_CFG"
 115 menuentry '$ISO_BASENAME' {
 116   loopback loop /$ISO_BASENAME
 117   linux (loop)/live/vmlinuz boot=live components findiso=/$ISO_BASENAME
 118   initrd (loop)/live/initrd.img
 119 }
 120
 121 EOT
 122 }
 123
 124 function setup_fedora {
 125     cat <<EOT > "$GRUB_PART_CFG"
 126 menuentry '$ISO_BASENAME' {
 127   loopback loop /$ISO_BASENAME
 128   linux (loop)/isolinux/vmlinuz root=live:CDLABEL=$(blkid -s LABEL -o value "${MULTIBOOT_MNT}/$ISO_BASENAME") rd.live.image quiet iso-scan/filename=/$ISO_BASENAME
 129   initrd (loop)/isolinux/initrd.img
 130 }
 131
 132 EOT
 133 }
 134
 135 function setup_archlinux {
 136     cat <<EOT > "$GRUB_PART_CFG"
 137 menuentry '$ISO_BASENAME' {
 138   loopback loop /$ISO_BASENAME
 139   linux (loop)/arch/boot/x86_64/vmlinuz img_label=${PARTITION_LABEL} img_loop=$ISO_BASENAME archisobasedir=arch earlymodules=loop
 140   initrd (loop)/arch/boot/x86_64/archiso.img
 141 }
 142
 143 EOT
 144 }
 145
 146 function setup_freedos {
 147     install_memdisk
 148
 149     cat <<EOT > "$GRUB_PART_CFG"
 150 menuentry '$ISO_BASENAME' {
 151   if [ \${grub_platform} = pc ]; then
 152     linux16 /memdisk raw
 153     initrd16 /$ISO_BASENAME
 154   else
 155     echo "FreeDOS only works with BIOS boot."
 156     sleep 3
 157   fi
 158 }
 159
 160 EOT
 161 }
 162
 163 function install_memdisk {
 164     local dest="${MULTIBOOT_MNT}/memdisk"
 165
 166     if [ -f "$dest" ]; then
 167         return
 168     fi
 169
 170     for maybe in /usr/lib/syslinux/bios/memdisk /usr/lib/syslinux/memdisk; do
 171         if [ -f "$maybe" ]; then
 172             cp "$maybe" "$dest"
 173             return
 174         fi
 175     done
 176
 177     curl --fail "$SYSLINUX_URL" | \
 178         tar xz --strip-components=3 -C "$MULTIBOOT_MNT" \
 179             "syslinux-${SYSLINUX_VERSION}/bios/memdisk/memdisk"
 180 }
 181
 182 function delete_stray_grub_parts {
 183     pushd "${MULTIBOOT_MNT}/grub/parts" &> /dev/null
 184     comm -13 \
 185          <(find "${MULTIBOOT_MNT}/" -maxdepth 1 -type f -printf '%f\n'|sort) \
 186          <(find "${MULTIBOOT_MNT}/grub/parts/" -type f -printf '%f\n'|sort) \
 187          | xargs -d '\n' -r rm
 188     popd &> /dev/null
 189 }
 190
 191 function print_grub_cfg {
 192     cat <<EOT
 193 insmod all_video
 194 insmod part_msdos
 195 insmod progress
 196 search --set=root --label $PARTITION_LABEL
 197
 198 EOT
 199
 200     cat "${MULTIBOOT_MNT}/grub/parts/"*
 201 }
 202
 203 CMD="cmd_${1:-}"
 204 shift || true
 205
 206 if [ "$(type -t -- "$CMD")" = "function" ]; then
 207     "${CMD}" "$@"
 208 else
 209     echo "Usage: $0 [format|mount|bootloader|add_iso|umount]"
 210     exit 1
 211 fi