/usr/lib/os-probes/mounted/83haiku is in os-prober 1.51ubuntu3.
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
# Detects Haiku on BeFS partitions.
. /usr/share/os-prober/common.sh
partition="$1"
mpoint="$2"
type="$3"
# Weed out stuff that doesn't apply to us
case "$type" in
befs|befs_be) debug "$partition is a BeFS partition" ;;
*) debug "$partition is not a BeFS partition: exiting"; exit 1 ;;
esac
if head -c 512 "$partition" | grep -qs "system.haiku_loader"; then
debug "Stage 1 bootloader found"
else
debug "Stage 1 bootloader not found: exiting"
exit 1
fi
if system="$(item_in_dir "system" "$mpoint")" &&
item_in_dir -q "haiku_loader" "$mpoint/$system" &&
item_in_dir -q "kernel_x86" "$mpoint/$system"
then
debug "Stage 2 bootloader and kernel found"
label="$(count_next_label Haiku)"
result "$partition:Haiku:$label:chain"
exit 0
else
debug "Stage 2 bootloader and kernel not found: exiting"
exit 1
fi
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