/lib/partman/active_partition/80resize/do_option is in ubiquity 18.04.14.
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 | #!/bin/sh
. /lib/partman/lib/resize.sh
dev=$2
oldid=$3
cd $dev
check_virtual
if [ "$virtual" = no ] && [ -f $oldid/detected_filesystem ]; then
if ! get_real_resize_range "$oldid" \
"$(cat "$oldid/detected_filesystem")"; then
db_input critical partman-partitioning/impossible_resize || true
db_go || true
exit 1
fi
else
get_resize_range
fi
if [ -z "$maxsize" ]; then
logger -t partman "Error: unable to determine maximum new size for partition"
db_input critical partman-partitioning/impossible_resize || true
db_go || true
exit 1
fi
human_resize_range
if [ "$virtual" = no ]; then
db_set partman-partitioning/confirm_resize false
db_input critical partman-partitioning/confirm_resize || true
db_go || exit 0
db_get partman-partitioning/confirm_resize
[ "$RET" = true ] || exit 0
fi
ask_for_size || exit $?
exit 100
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