/lib/partman/init.d/50biosgrub is in ubiquity 2.18.7.
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 | #! /bin/sh
# Set method "biosgrub" for all partitions that have the bios_grub flag set.
. /lib/partman/lib/base.sh
for dev in $DEVICES/*; do
[ -d "$dev" ] || continue
cd "$dev"
partitions=
open_dialog PARTITIONS
while { read_line num id size type fs path name; [ "$id" ]; }; do
if [ "$fs" != free ]; then
partitions="$partitions $id"
fi
done
close_dialog
for id in $partitions; do
biosgrub=no
open_dialog GET_FLAGS $id
while { read_line flag; [ "$flag" ]; }; do
if [ "$flag" = bios_grub ]; then
biosgrub=yes
# cannot break here
fi
done
close_dialog
if [ "$biosgrub" = yes ]; then
mkdir -p $id
echo biosgrub >$id/method
fi
done
done
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