252 lines
6.8 KiB
INI
252 lines
6.8 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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# Serial and keyboard configuration, very important.
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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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# Default to first option, automatically boot after 1 second
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set default="0"
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set timeout=10
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# This is useful when using 'cat' on long files on GRUB terminal
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set pager=1
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keymap usqwerty
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function try_user_config {
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set root="${1}"
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for dir in boot grub grub2 boot/grub boot/grub2; do
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for name in '' osboot_ autoboot_ libreboot_ coreboot_; do
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if [ -f /"${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: "
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# TODO : Find a better way to detect how many disks
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# : are on the computer instead of hardcoding.
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# FIXME: Does this work on all boards?
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for i in 0 1 2 3 4 5 6 7 8 9 10 11; do
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# TODO : Find a better way to detect how many partitions
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# : are on the disk instead of hardcoding.
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echo "\nTrying disk ${1}${i}"
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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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# MBR/GPT partitions
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echo "\nTrying partiton ${part}"
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try_user_config "(${1}${i},${part})"
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done
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# raw devices
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echo "\nTrying to boot to a raw disk ..."
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try_user_config "(${1}${i})"
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echo # Insert newline
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done
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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 "${dir}"/syslinux/syslinux.cfg
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fi
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done
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}
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function search_isolinux {
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unset ddev
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if [ (${1}?) != "(${1}?)" ]; then
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ddev=(${1}*) # Both raw and partitioned devices.
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echo -n "Attempting to parse isolinux menu from: "
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fi
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for i in ${ddev}; do
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echo -n "${i} "
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try_isolinux_config "${i}"
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done
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echo # Insert newline
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}
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menuentry 'Load Operating System (incl. fully encrypted disks) [o]' --hotkey='o' {
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# GRUB2 handles (almost) every possible disk setup, but only the location of
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# /boot is actually important since GRUB2 only loads the user's config.
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# LVM, RAID, filesystems and encryption on both raw devices and partitions in
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# all various combinations need to be supported. Since full disk encryption is
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# possible with GRUB2 as payload and probably even used by most users, this
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# configuration tries to load the operating system in the following way:
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# 1. Look for user configuration on unencrypted devices first to avoid
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# unnecessary decryption routines in the following order:
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# 1) raw devices and MBR/GPT partitions
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search_grub ahci
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search_grub ata
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# 2) LVM and RAID which might be used accross multiple devices
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unset lvmvol
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for vol in bootvol rootvol; do
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if [ (lvm\/?atrix-${vol}) != "(lvm/?atrix-${vol})" ]; then # Sketchy check, hardcoded string to be dropped in future
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lvmvol="${lvmvol} (lvm/matrix-${vol})"
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fi
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done
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unset raidvol
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if [ (md/?) != "(md/?)" ] ; then
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raidvol=(md/?)
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fi
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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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# 2. In case no configuration could be found, try decrypting devices. Look
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# on raw crypto devices as well as inside LVM volumes this time.
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# The user will be prompted for a passphrase if a LUKS header was found.
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# Encrypted disks and partitions
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#TODO: This needs to be adjusted on each device to exclude ODD
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#TODO: Usually ATA is for odd if both exist!
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#TODO: Unset variables before use!
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#TODO: Pick better variable name scheme than ${ddev}, or find way to make it local
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unset ahcidev
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unset atadev
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if [ (ahci?) != "(ahci?)" ]; then
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ahcilist=(ahci*)
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for part in ${ahcilist}; do
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ahcidev="$part $ahcidev"
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done
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fi
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if [ (ata?) != "(ata?)" ]; then
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atalist=(ata*)
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for part in ${atalist}; do
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atadev="$part $atadev"
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done
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fi
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set pager=0
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echo -n "Attempting to cryptomount: "
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for dev in ${ahcidev} ${atadev} ${lvmvol} ${raidvol}; do
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echo -n "${dev} "
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if cryptomount "${dev}" ; then break ; fi
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done
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set pager=1
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echo # Insert newline
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# Rescan lvm volumes, should probably use test at this point
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unset lvmvol
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for vol in bootvol rootvol; do
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if [ (lvm\/?atrix-${vol}) != "(lvm/?atrix-${vol})" ]; then # Sketchy check, hardcoded string to be dropped in future
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lvmvol="${lvmvol} (lvm/matrix-${vol})"
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fi
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done
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# 3) LVM inside LUKS containers
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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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# 4) encrypted devices/partitions
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search_grub crypto
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# TODO: generalize last resorts
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# Use first connected device? not just sata port 1
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# Last resort, if all else fails
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set root=ahci0,1
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for p in / /boot/; do
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if [ -f "${p}vmlinuz" ]; then
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linux ${p}vmlinuz root=/dev/sda1 rw
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if [ -f "${p}initrd.img" ]; then
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initrd ${p}initrd.img
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fi
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fi
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done
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# Last resort (for setups that use IDE instead of SATA)
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set root=ata0,1
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for p in / /boot/; do
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if [ -f "${p}vmlinuz" ]; then
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linux ${p}vmlinuz root=/dev/sda1 rw
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if [ -f "${p}initrd.img" ]; then
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initrd ${p}initrd.img
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fi
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fi
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done
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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 'Search ISOLINUX menu (AHCI) [a]' --hotkey='a' {
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search_isolinux ahci
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}
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menuentry 'Search ISOLINUX menu (USB) [u]' --hotkey='u' {
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search_isolinux usb
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}
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menuentry 'Search ISOLINUX menu (CD/DVD) [d]' --hotkey='d' {
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insmod ata
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unset ahcidev
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unset atadev
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if [ (ata?) != "(ata?)" ]; then
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atadev=(ata?) # Only full drives not partitions
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fi
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if [ (ahci?) != "(ahci?)" ]; then
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ahcidev=(ahci1) # TODO: hardcoded!!!
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fi
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echo -n "Attempting to parse isolinux menu from: "
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for dev in ${atadev} ${ahcidev}; do
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echo -n "${dev} "
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try_isolinux_config "${dev}"
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done
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echo # Insert newline
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}
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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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menuentry 'Search for GRUB2 configuration on external media [s]' --hotkey='s' {
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search_grub usb
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}
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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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