/lib/partman/active_partition/45ext3/choices is in ubiquity 2.10.16.
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 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103  | #!/bin/sh
. /usr/share/debconf/confmodule
set -e
dev=$1
id=$2
part=$dev/$id
cd $dev
[ -f $part/method -a -f $part/acting_filesystem ] || exit 0
filesystem=$(cat $part/acting_filesystem)
case "$filesystem" in
    ext3|ext4)
	:
	;;
    *)
	exit 0
	;;
esac
choice_mountpoint () {
	if [ -f $part/mountpoint ]; then
		mp=$(cat $part/mountpoint)
	else
		db_metaget partman-basicfilesystems/text/no_mountpoint description
		mp="$RET"
	fi
	db_metaget partman-basicfilesystems/text/specify_mountpoint description
	printf "mountpoint\t%s\${!TAB}%s\n" "$RET" "$mp"
}
choice_options () {
	db_metaget partman-basicfilesystems/text/options description
	printf "options\t%s\${!TAB}%.45s\n" "$RET" "$(get_mountoptions $dev $id)"
}
choice_label () {
	# allow to set label only if the partition is to be formatted
	[ -f $part/format ] || return 0
	[ ! -f $part/formatted \
	  -o $part/formatted -ot $part/method \
	  -o $part/formatted -ot $part/filesystem ] || return 0
	case "$filesystem" in
	    ext3|ext4)
		if [ -f $part/label ]; then
			label=$(cat $part/label)
		else
			db_metaget partman-basicfilesystems/text/none description
			label=$RET
		fi
		db_metaget partman-basicfilesystems/text/specify_label description
		printf "label\t%s\${!TAB}%s\n" "$RET" "$label"
		;;
	esac
}
choice_reserved () {
	local reserved
	# allow to set reserved space only if the partition is to be formatted
	[ -f $part/format ] || return 0
	[ ! -f $part/formatted \
	  -o $part/formatted -ot $part/method \
	  -o $part/formatted -ot $part/filesystem ] || return 0
	if [ -f $part/reserved_for_root ]; then
		reserved=$(cat $part/reserved_for_root)
	else
		reserved=5
	fi
	db_metaget partman-basicfilesystems/text/reserved_for_root description
	printf "reserved_for_root\t%s\${!TAB}%s\n" "$RET" "$reserved%"
}
choice_usage () {
	local usage
	# allow to set usage only if the partition is to be formatted
	[ -f $part/format ] || return 0
	[ ! -f $part/formatted \
	  -o $part/formatted -ot $part/method \
	  -o $part/formatted -ot $part/filesystem ] || return 0
	if [ -f $part/usage ]; then
		usage=$(cat $part/usage)
	else
		db_metaget partman-basicfilesystems/text/typical_usage description
		usage=$RET
	fi
	db_metaget partman-basicfilesystems/text/usage description
	printf "usage\t%s\${!TAB}%s\n" "$RET" "$usage"
}
choice_mountpoint
choice_options
choice_label
choice_reserved
choice_usage
 |