300 lines
7.4 KiB
INI
300 lines
7.4 KiB
INI
set prefix=(memdisk)/boot/grub
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insmod at_keyboard
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insmod usb_keyboard
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insmod nativedisk
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insmod ehci
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insmod ohci
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insmod uhci
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insmod usb
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insmod usbms
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insmod regexp
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terminal_input --append at_keyboard
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terminal_input --append usb_keyboard
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terminal_output --append cbmemc
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gfxpayload=keep
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terminal_output --append gfxterm
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if [ -f (cbfsdisk)/background.png ]; then
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insmod png
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background_image (cbfsdisk)/background.png
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elif [ -f (cbfsdisk)/background.jpg ]; then
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insmod jpeg
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background_image (cbfsdisk)/background.jpg
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fi
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set default="0"
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if [ -f (cbfsdisk)/timeout.cfg ]; then
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source (cbfsdisk)/timeout.cfg
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else
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set timeout=5
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fi
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set grub_scan_disk="both"
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if [ -f (cbfsdisk)/scan.cfg ]; then
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source (cbfsdisk)/scan.cfg
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fi
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if [ -f (cbfsdisk)/keymap.gkb ]; then
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keymap (cbfsdisk)/keymap.gkb
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elif [ -f (cbfsdisk)/keymap.cfg ]; then
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source (cbfsdisk)/keymap.cfg
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else
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keymap usqwerty
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fi
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function try_user_config {
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set root="${1}"
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# The @/... entries are for cases where the BTRFS filesystem is being used
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for dir in boot grub grub2 boot/grub boot/grub2 @/boot @/grub @/grub2 @/boot/grub @/boot/grub2; do
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for name in '' osboot_ autoboot_ libreboot_ coreboot_; do
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if [ -f /"${dir}"/"${name}"grub.cfg ]; then
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unset superusers
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configfile /"${dir}"/"${name}"grub.cfg
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fi
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done
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done
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}
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function search_grub {
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echo -n "Attempting to load grub.cfg from '${1}' devices"
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for i in 0 1 2 3 4 5 6 7 8 9 10 11; do
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for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20; do
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try_user_config "(${1}${i},${part})"
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done
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# raw devices e.g. (ahci0) instead of (ahci0,1)
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try_user_config "(${1}${i})"
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done
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echo # Insert newline
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}
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function try_isolinux_config {
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set root="${1}"
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for dir in '' /boot; do
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if [ -f "${dir}"/isolinux/isolinux.cfg ]; then
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syslinux_configfile -i "${dir}"/isolinux/isolinux.cfg
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elif [ -f "${dir}"/syslinux/syslinux.cfg ]; then
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syslinux_configfile -s "${dir}"/syslinux/syslinux.cfg
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fi
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done
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}
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function search_isolinux {
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echo "\nAttempting to parse isolinux/syslinux config from '${1}' devices"
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for i in 0 1 2 3 4 5 6 7 8 9 10 11; do
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for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20; do
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try_isolinux_config "(${1}${i},${part})"
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done
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# raw devices e.g. (usb0) instead of (usb0,1)
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try_isolinux_config "(${1}${i})"
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done
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echo # Insert newline
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}
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function try_without_config {
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}
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menuentry 'Load Operating System (incl. fully encrypted disks) [o]' --hotkey='o' {
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if [ "${grub_scan_disk}" != "ata" ]; then
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search_grub ahci
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fi
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if [ "${grub_scan_disk}" != "ahci" ]; then
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search_grub ata
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fi
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# grub device enumeration is very slow, so checks are hardcoded
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# TODO: add more strings, based on what distros set up when
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# the user select auto-partitioning on those installers
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lvmvol="lvm/grubcrypt-bootvol lvm/grubcrypt-rootvol"
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raidvol="md/0 md/1 md/2 md/3 md/4 md/5 md/6 md/7 md/8 md/9"
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# in practise, doing multiple redundant checks is perfectly fast and
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# TODO: optimize grub itself, and use */? here for everything
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for vol in ${lvmvol} ${raidvol} ; do
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try_user_config "${vol}"
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done
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unset ahcidev
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unset atadev
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for i in 11 10 9 8 7 6 5 4 3 2 1 0; do
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for part in 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1; do
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if [ "${grub_scan_disk}" != "ata" ]; then
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ahcidev="(ahci${i},${part}) ${ahcidev}"
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fi
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if [ "${grub_scan_disk}" != "ahci" ]; then
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atadev="(ata${i},${part}) ${atadev}"
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fi
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done
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done
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set pager=0
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echo -n "Attempting to unlock encrypted volumes"
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for dev in ${ahcidev} ${atadev} ${lvmvol} ${raidvol}; do
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if cryptomount "${dev}" ; then break ; fi
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done
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set pager=1
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echo
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# after cryptomount, lvm volumes might be available
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for vol in ${lvmvol}; do
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try_user_config "${vol}"
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done
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search_grub crypto
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for vol in lvm/* ; do
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try_user_config "${vol}"
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done
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# bruteforce as a last result. figure out how to boot
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# linux without a grub configuration file. (crypto and lvm unsupported)
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set vmlinuz=""
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set initrd=""
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set devtype=""
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set devnum=""
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set devletter=""
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set partnum=""
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for t in ata ahci; do
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set vmlinuz=""
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set initrd=""
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if [ "${t}" = "ata" ] && [ "${grub_scan_disk}" = "ahci" ]; then
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continue
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elif [ "${t}" = "ahci" ] && [ "${grub_scan_disk}" = "ata" ]; then
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continue
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fi
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for dev in 0 1 2 3 4 5 6 7 8; do
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for part in 1 2 3 4 5 6 7 8 9; do
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set root="${t}${devnum},${partnum}"
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set devnum="${dev}"
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set partnum="${part}"
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for k in /vmlinuz* @/vmlinuz*; do
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if [ ! -f "${k}" ] || [ ! -d /boot ]; then
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continue
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fi
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set vmlinuz="${k}"
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# do not break. if furthe rentries are
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# available, due to alphabetic sorting,
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# the next entry is likely a newer
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# kernel version
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done
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for k in /boot/vmlinuz* @/boot/vmlinuz*; do
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if [ "${vmlinuz}" != "" ]; then
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break
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fi
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set vmlinuz="${k}"
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done
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if [ "${vmlinuz}" = "" ]; then
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continue
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fi
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for i in /initrd* /initramfs* @/initrd* @/initramfs*; do
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if [ ! -f "${i}" ] || [ ! -d "/boot" ]; then
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continue
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done
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set initrd="${i}"
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# ditto. do not break yet
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done
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for i in /boot/initrd* /boot/initramfs* @/boot/initrd* @/boot/initramfs*; do
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if [ "${initrd}" != "" ]; then
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break
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fi
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set initrd="${i}"
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done
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if [ "${vmlinuz}" != "" ] && [ "${initrd}" != "" ]; then
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set devtype="${t}"
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break
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fi
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set vmlinuz=""
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set initrd=""
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done
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if [ "${vmlinuz}" != "" ] && [ "${initrd}" != "" ]; then
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break
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fi
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done
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if [ "${vmlinuz}" != "" ] && [ "${initrd}" != "" ]; then
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break
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fi
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done
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if [ "${vmlinuz}" = "" ] || [ "${initrd}" = "" ]; then
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return
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fi
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if [ "${devnum}" = "0" ]; then
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set devletter="a"
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elif [ "${devnum}" = "1" ]; then
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set devletter="b"
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elif [ "${devnum}" = "2" ]; then
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set devletter="c"
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elif [ "${devnum}" = "3" ]; then
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set devletter="d"
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elif [ "${devnum}" = "4" ]; then
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set devletter="e"
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elif [ "${devnum}" = "5" ]; then
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set devletter="f"
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elif [ "${devnum}" = "6" ]; then
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set devletter="g"
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elif [ "${devnum}" = "7" ]; then
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set devletter="h"
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elif [ "${devnum}" = "8" ]; then
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set devletter="i"
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fi
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set btrfsvol=""
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if [ "${vmlinuz#@}" != "${vmlinuz}" ]; then
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set btrfsvol="rootflags=subvol=@"
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fi
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set root="${devtype}${devnum},${partnum}"
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linux ${vmlinuz} root=/dev/sd${devletter}${partnum} ${btrfsvol} rw
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initrd ${initrd}
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true # Prevent pager requiring to accept each line instead of whole screen
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}
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menuentry 'Find and load GRUB config from USB drive [s]' --hotkey='s' {
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search_grub usb
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}
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menuentry 'Find and load ISOLINUX/EXTLINUX from USB drive [u]' --hotkey='u' {
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search_isolinux usb
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}
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menuentry 'Find and load ISOLINUX/EXTLINUX menu via AHCI [a]' --hotkey='a' {
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search_isolinux ahci
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}
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menuentry 'Find and load ISOLINUX/EXTLINUX menu via ATA/IDE [d]' --hotkey='d' {
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search_isolinux ata
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}
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if [ -f (cbfsdisk)/grubtest.cfg ]; then
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menuentry 'Load test configuration (grubtest.cfg) inside of CBFS [t]' --hotkey='t' {
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set root='(cbfsdisk)'
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if [ -f /grubtest.cfg ]; then
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configfile /grubtest.cfg
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fi
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}
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fi
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if [ -f (cbfsdisk)/seabios.elf ]; then
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menuentry 'Load SeaBIOS (payload) [b]' --hotkey='b' {
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set root='cbfsdisk'
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chainloader /seabios.elf
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}
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fi
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if [ -f (cbfsdisk)/img/grub2 ]; then
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menuentry 'Return to SeaBIOS [b]' --hotkey='b' {
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set root='cbfsdisk'
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chainloader /fallback/payload
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}
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fi
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menuentry 'Poweroff [p]' --hotkey='p' {
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halt
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}
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menuentry 'Reboot [r]' --hotkey='r' {
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reboot
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}
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if [ -f (cbfsdisk)/img/memtest ]; then
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menuentry 'Load MemTest86+ [m]' --hotkey='m' {
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set root='cbfsdisk'
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chainloader /img/memtest
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}
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fi
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