samba4: Run init script through shellcheck

Some performance improvements by batching file writes.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

net/samba4/Makefile

@@ -3,21 +3,21 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=samba
 PKG_VERSION:=4.9.11
-PKG_RELEASE:=1
-
-PKG_MAINTAINER:=Andy Walsh <andy.walsh44+github@gmail.com>
-PKG_LICENSE:=GPL-3.0-only
-PKG_LICENSE_FILES:=COPYING
+PKG_RELEASE:=2
 
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://ftp.heanet.ie/mirrors/ftp.samba.org/stable/ \
 		https://ftp.gwdg.de/pub/samba/stable/ \
 		https://ftp.riken.jp/net/samba/samba/stable/ \
 		http://www.nic.funet.fi/index/samba/pub/samba/stable/ \
 		http://samba.mirror.bit.nl/samba/ftp/stable/ \
 		https://download.samba.org/pub/samba/stable/
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_HASH:=bb736624d16f7369e395de2f15fec153b554f76f95864015b4ce1f2ae53e817b
 
+PKG_MAINTAINER:=Andy Walsh <andy.walsh44+github@gmail.com>
+PKG_LICENSE:=GPL-3.0-only
+PKG_LICENSE_FILES:=COPYING
+
 # samba4=(asn1_compile) e2fsprogs=(compile_et) nfs-kernel-server=(rpcgen)
 HOST_BUILD_DEPENDS:=nfs-kernel-server/host e2fsprogs/host
 PKG_BUILD_DEPENDS:=samba4/host
@@ -43,7 +43,7 @@ define Package/samba4/Default
   SECTION:=net
   CATEGORY:=Network
   TITLE:=Samba $(PKG_VERSION)
-  URL:=http://www.samba.org/
+  URL:=https://www.samba.org/
 endef
 
 define Package/samba4/Default/description

net/samba4/files/samba.init

@@ -7,7 +7,8 @@ smb_header() {
 	config_get samba_iface $1 interface "loopback lan"
 
 	# resolve interfaces
-	local interfaces=$(
+	local interfaces
+	interfaces=$(
 		. /lib/functions/network.sh
 
 		local net
@@ -15,19 +16,20 @@ smb_header() {
 			local device
 			network_is_up $net || continue
 			network_get_device device "$net"
-			echo -n "${device:-$net} "
+			printf "%s " "${device:-$net}"
 		done
 	)
 
 	local workgroup description charset
 	# we dont use netbios anymore as default and wsd/avahi is dns based
-	local hostname="$(cat /proc/sys/kernel/hostname)"
+	local hostname
+	hostname="$(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 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	$1 disable_winbind	0
@@ -40,15 +42,16 @@ smb_header() {
 	    -e "s#|CHARSET|#$charset#g" \
 	    /etc/samba/smb.conf.template > /var/etc/smb.conf
 
-	echo -e "\n######### Dynamic written config options #########\n" >> /var/etc/smb.conf
-	if [ "$DISABLE_NETBIOS" -eq 1 ] || [ ! -x /usr/sbin/nmbd ]; then
-		echo -e "\tdisable netbios = yes" >> /var/etc/smb.conf
-	fi
+	{
+		printf "\n######### Dynamic written config options #########\n"
+		if [ "$DISABLE_NETBIOS" -eq 1 ] || [ ! -x /usr/sbin/nmbd ]; then
+			printf "\tdisable netbios = yes\n"
+		fi
 
-	local homes
-	config_get_bool homes $1 homes 0
-	[ $homes -gt 0 ] && {
-		cat <<EOT >> /var/etc/smb.conf
+		local homes
+		config_get_bool homes $1 homes 0
+		[ $homes -gt 0 ] && {
+			cat <<EOT
 
 [homes]
 	comment     = Home Directories
@@ -57,14 +60,15 @@ smb_header() {
 	read only   = no
 	create mask = 0750
 EOT
-	}
+		}
+	} >> /var/etc/smb.conf
 
 	[ -e /etc/samba/smb.conf ] || ln -nsf /var/etc/smb.conf /etc/samba/smb.conf
-	
+
 	if ! [ -L /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() {
@@ -104,43 +108,45 @@ smb_add_share() {
 	config_get write_list $1 write_list
 	config_get read_list $1 read_list
 
-	[ -z "$name" -o -z "$path" ] && return
+	[ -z "$name" ] || [ -z "$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 = $users" >> /var/etc/smb.conf
-	fi
+	{
+		printf "\n[$name]\n\tpath = %s\n" "$path"
 
-	[ -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 = $read_only" >> /var/etc/smb.conf
-	[ -n "$writeable" ] && echo -e "\twriteable = $writeable" >> /var/etc/smb.conf
-	[ -n "$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 = ${timemachine_maxsize}G" >> /var/etc/smb.conf
+		if [ "$force_root" -eq 1 ]; then
+			printf "\tforce user = root\n"
+			printf "\tforce group = root\n"
+		else
+			[ -n "$users" ] && printf "\tvalid users = %s\n" "$users"
 		fi
-	fi
-	
-	[ -n "$vfs_objects" ] && echo -e "\tvfs objects = $vfs_objects" >> /var/etc/smb.conf
+
+		[ -n "$create_mask" ] && printf "\tcreate mask = %s\n" "$create_mask"
+		[ -n "$dir_mask" ] && printf "\tdirectory mask = %s\n" "$dir_mask"
+
+		[ -n "$browseable" ] && printf "\tbrowseable = %s\n" "$browseable"
+		[ -n "$read_only" ] && printf "\tread only = %s\n" "$read_only"
+		[ -n "$writeable" ] && printf "\twriteable = %s\n" "$writeable"
+		[ -n "$guest_ok" ] && printf "\tguest ok = %s\n" "$guest_ok"
+		[ -n "$guest_only" ] && printf "\tguest only = %s\n" "$guest_only"
+		[ -n "$inherit_owner" ] && printf "\tinherit owner = %s\n" "$inherit_owner"
+
+		[ -n "$write_list" ] && printf "\twrite list = %s\n" "$write_list"
+		[ -n "$read_list" ] && printf "\tread list = %s\n" "$read_list"
+
+		if [ "$MACOS" -eq 1 ]; then
+			vfs_objects="catia fruit streams_xattr $vfs_objects"
+			printf "\tfruit:encoding = native\n"
+			printf "\tfruit:metadata = stream\n"
+			printf "\tfruit:veto_appledouble = no\n"
+			# avoid mixed shares order for aapl
+			if [ "$timemachine" -eq 1 ]; then
+				printf "\tfruit:time machine = yes\n"
+				[ -n "$timemachine_maxsize" ] && printf "\tfruit:time machine max size = %sG\n" "${timemachine_maxsize}"
+			fi
+		fi
+
+		[ -n "$vfs_objects" ] && printf "\tvfs objects = %s\n" "$vfs_objects"
+	} >> /var/etc/smb.conf
 }
 
 init_config() {
@@ -149,10 +155,8 @@ init_config() {
 	[ -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
-	}
+	[ -d /var/lock ] || mkdir -p /var/lock
+	chmod 0755 /var/lock
 
 	config_load samba4
 	config_foreach smb_header samba
@@ -161,9 +165,9 @@ init_config() {
 
 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
@@ -207,9 +211,9 @@ start_service() {
 	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 $(pidof winbindd)
+		[ -x /usr/sbin/samba ] && renice -n 2 "$(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
 }