/lib/partman/check.d/10ext2_boot is in ubiquity 2.21.63.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | #!/bin/sh
# Check if boot partition gets mounted on /boot/grub, /boot or root,
# is of type ext2 and is the first partition.
ARCH="$(archdetect)"
case $ARCH in
powerpc/chrp_pegasos)
;;
*)
exit 0
;;
esac
. /lib/partman/lib/base.sh
for dev in $DEVICES/*; do
[ -d "$dev" ] || continue
cd $dev
open_dialog PARTITIONS
while { read_line num id size type fs path name; [ "$id" ]; }; do
[ "$fs" != free ] || continue
[ -f $id/method ] || continue
[ -f $id/acting_filesystem ] || continue
[ -f $id/mountpoint ] || continue
mountpoint=$(cat $id/mountpoint)
filesystem=$(cat $id/acting_filesystem)
if [ "$mountpoint" = / ]; then
root_fs=$filesystem
root_type=$type
root_path=$path
elif [ "$mountpoint" = /boot ]; then
boot_fs=$filesystem
boot_type=$type
boot_path=$path
elif [ "$mountpoint" = /boot/grub ]; then
boot_grub_fs=$filesystem
boot_grub_type=$type
boot_grub_path=$path
fi
done
close_dialog
done
# Check if separate /boot/grub partition exists
if [ -n "$boot_grub_path" ]; then
boot_fs=$boot_grub_fs
boot_type=$boot_grub_type
boot_path=$boot_grub_path
fi
# If no separate boot partition exists then root acts as boot
if [ -z "$boot_path" ]; then
boot_fs=$root_fs
boot_type=$root_type
boot_path=$root_path
fi
# We need an ext2 filesystem to boot
if [ "$boot_fs" != ext2 ]; then
db_set partman-basicfilesystems/boot_not_ext2 true
db_input critical partman-basicfilesystems/boot_not_ext2 || true
db_go || true
db_get partman-basicfilesystems/boot_not_ext2
if [ "$RET" = true ]; then
exit 1
fi
fi
# The boot file system has to be on the first partition
part_num=$(echo "$boot_path" | sed -e 's/.*[^0-9]\+//')
if [ "$part_num" -ne 1 ]; then
db_set partman-basicfilesystems/boot_not_first_partition true
db_input critical partman-basicfilesystems/boot_not_first_partition || true
db_go || true
db_get partman-basicfilesystems/boot_not_first_partition
if [ "$RET" = true ]; then
exit 1
fi
fi
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