#!/bin/sh /etc/rc.common

START=98
USE_PROCD=1

smb_header() {
	config_get samba_iface $1 interface "loopback lan"

	# resolve interfaces
	local interfaces=$(
		. /lib/functions/network.sh

		local net
		for net in $samba_iface; do
			local device
			network_is_up $net || continue
			network_get_device device "$net"
			echo -n "${device:-$net} "
		done
	)

	local workgroup description charset
	# we dont use netbios anymore as default and wsd/avahi is dns based
	local hostname="$(cat /proc/sys/kernel/hostname)"

	config_get workgroup		$1 workgroup	"WORKGROUP"
	config_get description		$1 description	"Samba on OpenWrt"
	config_get charset			$1 charset		"UTF-8"
	
	config_get_bool MACOS			$1 macos			0
	config_get_bool DISABLE_NETBIOS	$1 disable_netbios	0
	config_get_bool DISABLE_AD_DC	$1 disable_ad_dc	0
	config_get_bool DISABLE_WINBIND	$1 disable_winbind	0

	mkdir -p /var/etc
	sed -e "s#|NAME|#$hostname#g" \
	    -e "s#|WORKGROUP|#$workgroup#g" \
	    -e "s#|DESCRIPTION|#$description#g" \
	    -e "s#|INTERFACES|#$interfaces#g" \
	    -e "s#|CHARSET|#$charset#g" \
	    /etc/samba/smb.conf.template > /var/etc/smb.conf

	echo -e "\n######### Dynamic written config options #########\n" >> /var/etc/smb.conf
	if [ "$DISABLE_NETBIOS" -eq 1 ] || [ ! -x /usr/sbin/nmbd ]; then
		echo -e "\tdisable netbios = yes" >> /var/etc/smb.conf
	fi

	local homes
	config_get_bool homes $1 homes 0
	[ $homes -gt 0 ] && {
		cat <<EOT >> /var/etc/smb.conf

[homes]
	comment     = Home Directories
	browsable   = no
	writable = yes
	read only   = no
	create mask = 0750
EOT
	}

	[ -e /etc/samba/smb.conf ] || ln -nsf /var/etc/smb.conf /etc/samba/smb.conf
	
	if [ -f /etc/samba/smb.conf ]; then
		logger -t 'samba4-server' "Local custom /etc/samba/smb.conf file detected, all luci/config settings are ignored!"
	fi
	
}

smb_add_share() {
	local name
	local path
	local users
	local create_mask
	local dir_mask
	local browseable
	local read_only
	local guest_ok
	local guest_only
	local inherit_owner
	local vfs_objects
	local timemachine
	local timemachine_maxsize
	local force_root
	local write_list
	local read_list

	config_get name $1 name
	config_get path $1 path
	config_get users $1 users
	config_get create_mask $1 create_mask
	config_get dir_mask $1 dir_mask
	config_get browseable $1 browseable
	config_get read_only $1 read_only
	config_get guest_ok $1 guest_ok
	config_get guest_only $1 guest_only
	config_get inherit_owner $1 inherit_owner
	config_get vfs_objects $1 vfs_objects
	config_get_bool timemachine	$1 timemachine	0
	config_get timemachine_maxsize $1 timemachine_maxsize
	config_get_bool force_root	$1 force_root	0
	config_get write_list $1 write_list
	config_get read_list $1 read_list

	[ -z "$name" -o -z "$path" ] && return

	echo -e "\n[$name]\n\tpath = $path" >> /var/etc/smb.conf
	
	if [ "$force_root" -eq 1 ]; then
		echo -e "\tforce user = root" >> /var/etc/smb.conf
		echo -e "\tforce group = root" >> /var/etc/smb.conf
	else
		[ -n "$users" ] && echo -e "\tvalid users = $users" >> /var/etc/smb.conf
	fi

	[ -n "$create_mask" ] && echo -e "\tcreate mask = $create_mask" >> /var/etc/smb.conf
	[ -n "$dir_mask" ] && echo -e "\tdirectory mask = $dir_mask" >> /var/etc/smb.conf

	[ -n "$browseable" ] && echo -e "\tbrowseable = $browseable" >> /var/etc/smb.conf
	[ -n "$read_only" ] && echo -e "\tread only = $read_only" >> /var/etc/smb.conf
	[ -n "$guest_ok" ] && echo -e "\tguest ok = $guest_ok" >> /var/etc/smb.conf
	[ -n "$guest_only" ] && echo -e "\tguest only = $guest_only" >> /var/etc/smb.conf
	[ -n "$inherit_owner" ] && echo -e "\tinherit owner = $inherit_owner" >> /var/etc/smb.conf

	[ -n "$write_list" ] && echo -e "\twrite list = $write_list" >> /var/etc/smb.conf
	[ -n "$read_list" ] && echo -e "\tread list = $read_list" >> /var/etc/smb.conf

	if [ "$MACOS" -eq 1 ]; then
		vfs_objects="catia fruit streams_xattr $vfs_objects"
		echo -e "\tfruit:encoding = native" >> /var/etc/smb.conf
		echo -e "\tfruit:metadata = stream" >> /var/etc/smb.conf
		echo -e "\tfruit:veto_appledouble = no" >> /var/etc/smb.conf
		# avoid mixed shares order for aapl
		if [ "$timemachine" -eq 1 ]; then
			echo -e "\tfruit:time machine = yes" >> /var/etc/smb.conf
			[ -n "$timemachine_maxsize" ] && echo -e "\tfruit:time machine max size = ${timemachine_maxsize}G" >> /var/etc/smb.conf
		fi
	fi
	
	[ -n "$vfs_objects" ] && echo -e "\tvfs objects = $vfs_objects" >> /var/etc/smb.conf
}

init_config() {
	# Create samba dirs
	[ -d /var/lib/samba ] || mkdir -p /var/lib/samba
	[ -d /var/cache/samba ] || mkdir -p /var/cache/samba
	[ -d /var/run/samba ] || mkdir -p /var/run/samba
	[ -d /var/log/samba ] || mkdir -p /var/log/samba
	[ -d /var/lock ] && chmod 0755 /var/lock || {
		mkdir -p /var/lock
		chmod 0755 /var/lock
	}

	config_load samba4
	config_foreach smb_header samba
	config_foreach smb_add_share sambashare
}

service_triggers() {
	PROCD_RELOAD_DELAY=2000
	
	procd_add_reload_trigger "dhcp" "system" "samba4"
	
	local i
	for i in $samba_iface; do
		procd_add_reload_interface_trigger $i
	done
}

start_service() {
	init_config

	# start main AD-DC daemon, will spawn (smbd,nmbd,winbindd) as needed/configured.
	if [ "$DISABLE_AD_DC" -ne 1 ] && [ -x /usr/sbin/samba ]; then
		procd_open_instance
		procd_set_param command /usr/sbin/samba -F
		procd_set_param respawn
		procd_set_param file /var/etc/smb.conf
		procd_close_instance
	else
		# start fileserver daemon
		procd_open_instance
		procd_set_param command /usr/sbin/smbd -F
		procd_set_param respawn
		procd_set_param file /var/etc/smb.conf
		procd_close_instance

		# start netbios daemon
		if [ "$DISABLE_NETBIOS" -ne 1 ] && [ -x /usr/sbin/nmbd ]; then
			procd_open_instance
			procd_set_param command /usr/sbin/nmbd -F
			procd_set_param respawn
			procd_set_param file /var/etc/smb.conf
			procd_close_instance
		fi
		# start winbind daemon
		if [ "$DISABLE_WINBIND" -ne 1 ] && [ -x /usr/sbin/winbindd ]; then
			procd_open_instance
			procd_set_param command /usr/sbin/winbindd -F
			procd_set_param respawn
			procd_set_param file /var/etc/smb.conf
			procd_close_instance
		fi
	fi
	# lower priority using renice (if found)
	if [ -x /usr/bin/renice ]; then
		[ -x /usr/sbin/samba ] && renice -n 2 $(pidof samba)
		[ -x /usr/sbin/smbd ] && renice -n 2 $(pidof smbd)
		[ -x /usr/sbin/nmbd ] && renice -n 2 $(pidof nmbd)
		[ -x /usr/sbin/winbindd ] && renice -n 2 $(pidof winbindd)
	fi
}