#!/bin/sh
# Test for linux distributions.
set -e

. /usr/share/os-prober/common.sh

partition="$1"
dir="$2"
type="$3"

# This test is inaccurate, but given separate / and /boot partitions and the
# fact that only some architectures have ld-linux.so, I can't see anything
# better. Make sure this test has a high number so that more accurate tests
# can come first.
# Unless volumes to checked are already mounted, they will be mounted using
# GRUB's own filesystems through FUSE. Since these ATM doesn't support
# symlinks we need to also check in $dir/usr/lib* for distributions that
# moved /lib* to /usr and only left symlinks behind.
# TODO: look for ld-linux.so on arches that have it
if (ls "$dir"/lib*/ld*.so* || ls "$dir"/usr/lib*/ld*.so*) >/dev/null 2>/dev/null; then
	if [ -e "$dir/etc/debian_version" ]; then
		short="Debian"
		long="$(printf "Debian GNU/Linux (%s)\n" "$(cat "$dir/etc/debian_version")")"
	# RPM derived distributions may also have a redhat-release or
	# mandrake-release, so check their files first.

        elif [ -e "$dir/etc/devuan_version" ]; then
                short="Devuan"
                long="$(printf "Devuan GNU/Linux (%s)\n" "$(cat "$dir/etc/devuan_version")")"
        elif [ -e "$dir/etc/vuudo_version" ]; then
                short="Vuu-do"
                long="$(printf "Vuu-do GNU/Linux (%s)\n" "$(cat "$dir/etc/vuudo_version")")"
	elif [ -e "$dir/etc/altlinux-release" ]; then
		short="ALTLinux"
		long="$(cat "$dir/etc/altlinux-release")"
	elif [ -e "$dir/etc/magic-release" ]; then
		short="Magic"
		long="$(cat "$dir/etc/magic-release")"
	elif [ -e "$dir/etc/blackPanther-release" ]; then
		short="blackPanther"
		long="$(cat "$dir/etc/blackPanther-release")"
	elif [ -e "$dir/etc/ark-release" ]; then
		short="Ark"
		long="$(cat "$dir/etc/ark-release")"
	elif [ -e "$dir/etc/arch-release" ]; then
		short="Arch"
		long="$(cat "$dir/etc/arch-release")"
	elif [ -e "$dir/etc/vine-release" ]; then
		short="Vine"
		long="$(cat "$dir/etc/vine-release")"
	elif [ -e "$dir/etc/pld-release" ]; then
		short="PLD"
		long="$(cat "$dir/etc/pld-release")"
	elif [ -e "$dir/etc/fedora-release" ]; then
		short="Fedora"
		long="$(cat "$dir/etc/fedora-release")"
	elif [ -e "$dir/etc/redhat-release" ]; then
		short="RedHat"
		long="$(cat "$dir/etc/redhat-release")"
	elif [ -e "$dir/etc/SuSE-release" ]; then
		short="SuSE"
		long="$(head -n 1 "$dir/etc/SuSE-release")"
	elif [ -e "$dir/etc/gentoo-release" ]; then
		short="Gentoo"
		long="$(cat "$dir/etc/gentoo-release")"
	elif [ -e "$dir/etc/turbolinux-release" ]; then
		short="Turbolinux"
		long="$(cat "$dir/etc/turbolinux-release")"
	elif [ -e "$dir/etc/pardus-release" ]; then
		short="Pardus"
		long="$(cat "$dir/etc/pardus-release")"
	elif [ -e "$dir/etc/kanotix-version" ]; then
		short="Kanotix"
		long="$(cat "$dir/etc/kanotix-version")"
	elif [ -e "$dir/etc/slackware-version" ]; then
		short="Slackware"
		long="$(printf "Slackware Linux (%s)\n" "$(cat "$dir/etc/slackware-version")")"
	elif [ -e "$dir/sbin/pkgtool" ]; then
		short="Slackware"
		long="Slackware Linux"
	elif [ -e "$dir/etc/frugalware-release" ]; then
		short="Frugalware Linux"
		long="$(cat "$dir/etc/frugalware-release")"
	elif [ -e "$dir/etc/lfs-release" ]; then
		short="LFS"
		long="$(printf "Linux From Scratch (%s)\n" "$(cat "$dir/etc/lfs-release")")"
	else
		short="Linux"
		long="unknown Linux distribution"
	fi
	
        label="$(count_next_label "$short")"
	result "$partition:$long:$label:linux"
	exit 0
else
	exit 1
fi