/usr/lib/os-probes/mounted/efi/10elilo is in os-prober 1.76~deb9u1.
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 | #!/bin/sh
# Detects ELILO bootloader on a EFI System Partition
. /usr/share/os-prober/common.sh
efi="$1"
found=
elilo=`find $1 -name "elilo.efi"`
if [ -n "$elilo" ]; then
	bdir="${elilo%/*}"
	bdir="${elilo##*/}"
	long="ELILO Boot Manager"
	short="ELILO"
	path=${bdir}/elilo.efi
	found=true
fi  
if [ -n "$found" ]; then
	label="$(count_next_label "$short")"
	result "${path}:${long}:${label}"
fi
exit 0
 |