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Current File : /sbin/setup-lbu
#!/bin/sh

PREFIX=
: ${LIBDIR=$PREFIX/lib}
. "$LIBDIR/libalpine.sh"

usage() {
	cat <<-__EOF__
		usage: setup-lbu [-hq] [MEDIA]

		Setup lbu media settings.

		MEDIA is optional mountpoint under /media

		options:
		 -h  Show this help
		 -q  Quietly pick best suggestion. Only prompts user if unsure.

	__EOF__
	exit $1
}

get_filesystem_type() {
	local mountpoint="$1"
	shift
	awk "\$2==\"$mountpoint\" {print \$3}" "$@" 2>/dev/null
}

get_dev() {
	local mountpoint="$1"
	shift
	awk "\$2==\"$mountpoint\" {print \$1}" "$@" 2>/dev/null
}

is_in_fstab() {
	test -n "$(get_filesystem_type $1 "$ROOT"/etc/fstab)"
}

is_mounted() {
	test -n "$(get_filesystem_type $1 "$ROOT"/proc/mounts)"
}

is_iso9660() {
	local fs
	for fs in $(get_filesystem_type $1 "$ROOT"/proc/mounts "$ROOT"/etc/fstab); do
		if [ "$fs" = "iso9660" ]; then
			return 0
		fi
	done
	return 1
}

set_media() {
	local media="${1%/}"	# strip trailing /
	local mnt=/media/$media

	case "$media" in
		LABEL=*|UUID=*) mkdir -p $ROOT/media/$media;;
	esac
	if [ -d "$media" ] && [ "${media#/media/}" != "$media" ]; then
		mnt="$media"
		media=${mnt#/media/}
	fi
	if [ "$ROOT" = "/" ] && ! [ -d "$mnt" ]; then
		echo "$mnt: not a directory" >&2
		exit 1
	fi

	# set  LBU_MEDIA in /etc/lbu/lbu.conf
	if [ -f "${ROOT}"etc/lbu/lbu.conf ]; then
		sed -e "/^\#\?[[:space:]]*LBU_MEDIA=.*/s/.*/LBU_MEDIA=$media/" \
			-i "${ROOT}"etc/lbu/lbu.conf
		if ! egrep -q '^LBU_MEDIA=' "${ROOT}"etc/lbu/lbu.conf; then
			echo "LBU_MEDIA=$media" >> "${ROOT}"etc/lbu/lbu.conf
		fi
	else
		mkdir -p "${ROOT}"etc/lbu
		echo "LBU_MEDIA=$media" >> "${ROOT}"etc/lbu/lbu.conf
	fi

	# append to fstab if its missing
	if ! is_in_fstab $mnt; then
		case "$media" in
			LABEL=*|UUID=*)
				dev=$(findfs $media)
				;;
			*)	dev=$(get_dev $mnt "$ROOT"/proc/mounts)
				;;
		esac
		if [ -z "$dev" ]; then
			echo "$media: Could not find device" >&2
			exit 1
		fi
		# get TYPE=... LABEL=... UUID=... from blkid
		eval $(blkid $dev | awk -F: '{print $2}')
		if [ -z "$TYPE" ]; then
			echo "$media: Could not find filesystem type" >&2
			exit 1
		fi
		if [ -n "$UUID" ]; then
			UUID="UUID=$UUID"
		fi
		# use LABEL= if it was specifically selected, otherwise use UUID
		case "$media" in
			LABEL=*|UUID=*) UUID="$media";;
		esac
		mkdir -p "$ROOT"/etc
		printf "%s\t%s\t%s\tnoauto,ro 0 0\n" "${UUID:-$dev}" "$mnt" "$TYPE" >> "$ROOT"/etc/fstab
	fi

	# hack in case we have alpine_dev mounted on /media/usbdisk but
	# lbu is stored on /media/usb
	# Otherwise we get issues when we do lbu commit.
	if [ "$media" = "usb" ] && is_mounted /media/usbdisk; then
		mount --move /media/usbdisk /media/usb
	elif [ "$media" = "usbdisk" ] && is_mounted /media/usb; then
		mount --move /media/usb /media/usbdisk
	fi
}

while getopts "hq" opt; do
	case $opt in
		h) usage 0;;
		q) quiet=1;;
		'?') usage "1" >&2;;
	esac
done
shift $(($OPTIND - 1))

# check if MEDIA option was given
if [ -n "$1" ]; then
	if [ "$1" = "none" ]; then
		exit
	fi
	set_media "$1"
	exit
fi

alternatives=
suggestion="none"
for dir in /media/*; do
	[ -d "$dir" ] || continue
	if is_iso9660 "$dir"; then
		continue
	fi

	alternatives="$alternatives, '${dir#/media/}'"
	if is_mounted "$dir"; then
		suggestion=${dir#/media/}
		[ -n "$quiet" ] && media=$suggestion
	fi
done

if findfs "LABEL=APKOVL" >/dev/null; then
	suggestion="LABEL=APKOVL"
	case ", $alternatives, " in
		*"'LABEL=APKOVL'"*)
			;;
		*) alternatives="$alternatives, 'LABEL=APKOVL'"
			;;
	esac
fi

# strip leading , + space
alternatives=${alternatives#, }

# if nothing is mounted (or boot from cdrom)
usbmnt=$(awk '$1 == "/dev/usbdisk" {print $2}' /proc/mounts)
if [ -z "$suggestion" ] && [ -n "$usbmnt" ]; then
	suggestion=${usbmnt#/media/}
	if [ -n "$quiet" ] && [ -e /dev/usbdisk ]; then
		media=$suggestion
	fi
fi

while [ -z "$media" ]; do
	ask "Enter where to store configs ($alternatives or 'none')" "$suggestion"
	media="$resp"
	case "$media" in
		none|LABEL=*) break;;
	esac
	if [ -d "/media/$media" ]; then
		break
	fi
	echo "/media/$media is not a directory. Please try again."
	media=
done

if [ "$media" = "none" ]; then
	exit 0
fi

set_media "$media"

Anon7 - 2022
AnonSec Team