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✏️ Editing: linux-boot-prober

#!/bin/sh
. /usr/share/os-prober/common.sh

set -e

newns "$@"
require_tmpdir

grep "^/dev/" /proc/mounts | parse_proc_mounts >"$OS_PROBER_TMP/mounted-map" || true

partition="$1"

if [ -z "$partition" ]; then
	echo "usage: linux-boot-prober partition" >&2
	exit 1
fi

if ! mapped="$(mapdevfs "$partition")"; then
	log "Device '$partition' does not exist; skipping"
	continue
fi

if ! grep -q "^$mapped " "$OS_PROBER_TMP/mounted-map"; then
	for test in /usr/lib/linux-boot-probes/*; do
		debug "running $test"
		if [ -x $test ] && [ -f $test ]; then
			if $test "$partition"; then
				debug "linux detected by $test"
				break
			fi
		fi
	done
else
	mpoint=$(grep "^$mapped " "$OS_PROBER_TMP/mounted-map" | head -n1 | cut -d " " -f 2)
	mpoint="$(unescape_mount "$mpoint")"
	if [ "$mpoint" != "/target/boot" ] && [ "$mpoint" != "/target" ] && [ "$mpoint" != "/" ]; then
		type=$(grep "^$mapped " "$OS_PROBER_TMP/mounted-map" | head -n1 | cut -d " " -f 3)
		if ! grep -q " $mpoint/boot " "$OS_PROBER_TMP/mounted-map"; then
			linux_mount_boot "$partition" "$mpoint"
			bootpart="${mountboot%% *}"
			bootmounted="${mountboot#* }"
		else
			bootpart="$partition"
			bootmounted=0
		fi
		for test in /usr/lib/linux-boot-probes/mounted/*; do
			if [ -f $test ] && [ -x $test ]; then
				debug "running $test on mounted $partition"
				if $test "$partition" "$bootpart" "$mpoint" "$type"; then
					debug "$test succeeded"
					break
				fi
			fi
		done
		if [ "$bootmounted" = 1 ]; then
			if ! umount "$mpoint/boot"; then
				warn "failed to umount $mpoint/boot"
			fi
		fi
	fi
fi

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