/lib/partman/active_partition/80resize/choices 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 42 43 44 45 46 47 48 49 | #!/bin/sh
. /lib/partman/lib/base.sh
dev=$1
id=$2
cd $dev
open_dialog GET_LABEL_TYPE
read_line label
close_dialog
# Disable on devices where there is no "real" partitioning
if [ "$label" = loop ]; then
exit 0
fi
if [ -f $id/detected_filesystem ]; then
fs=$(cat $id/detected_filesystem)
case "$fs" in
linux-swap|fat16|fat32|hfs|hfs+|hfsx)
;;
ext2|ext3|ext4)
if ! search-path tune2fs || ! search-path resize2fs; then
exit 0
fi
;;
ntfs)
if ! search-path ntfsresize; then
exit 0
fi
;;
*)
exit 0
;;
esac
else
exit 0
fi
open_dialog PARTITION_INFO $id
read_line x1 id size x4 x5 x6 x7 x8
close_dialog
hsize=$(longint2human $size)
db_subst partman-partitioning/text/resize SIZE "$hsize"
db_metaget partman-partitioning/text/resize description
printf "resize\t%s\n" "${RET}"
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