ympd: fix for DSM 5

- needs a single executable for service command

spk/ympd/Makefile

@@ -1,14 +1,14 @@
 SPK_NAME = ympd
 SPK_VERS = 1.3.0
-SPK_REV = 1
+SPK_REV = 2
 SPK_ICON = src/ympd.png
 DSM_UI_DIR = app
 
 DEPENDS = cross/ympd
 
 MAINTAINER = hgy59
 DESCRIPTION = ympd: Standalone MPD Web GUI written in C, utilizing Websockets and Bootstrap/JS.
-CHANGELOG = "Initial package release."
+CHANGELOG = "Fix service start for DSM 5 / SRM."
 
 DISPLAY_NAME = MPD Web GUI
 
@@ -22,4 +22,11 @@ SERVICE_USER = auto
 SERVICE_SETUP = src/service-setup.sh
 ADMIN_PORT = $(SERVICE_PORT)
 
+POST_STRIP_TARGET = ympd_extra_install
+
 include ../../mk/spksrc.spk.mk
+
+.PHONY: ympd_extra_install
+ympd_extra_install:
+	@$(MSG) Install service script
+	@install -m 755 src/start.sh $(STAGING_DIR)/bin/

spk/ympd/src/service-setup.sh

@@ -1,4 +1,7 @@
 
-SERVICE_COMMAND="${SYNOPKG_PKGDEST}/bin/ympd -w ${SERVICE_PORT}"
-SVC_BACKGROUND=y
-SVC_WRITE_PID=y
+# pass variables by env
+export PID_FILE=${PID_FILE}
+export SERVICE_PORT=${SERVICE_PORT}
+export SYNOPKG_PKGDEST=${SYNOPKG_PKGDEST}
+
+SERVICE_COMMAND="${SYNOPKG_PKGDEST}/bin/start.sh"

spk/ympd/src/start.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+# we need a single file to start the service and create the pid-file
+# the combination of 
+# - SVC_BACKGROUND=y
+# - SVC_WRITE_PID=y
+# does not work in DSM 5 when SERVICE_COMMAND is a command with parameters.
+# On DSM 5 /bin/sh is ash and not bash and '/bin/sh -c "command parameter" &' will create a new process for "command parameter"
+# finally we have two processes in the background, but are not able to retrieve the PID of "command parameter"
+# 
+
+if [ -z "${SYNOPKG_PKGDEST}" -o -z "${PID_FILE}" -o -z "${SERVICE_PORT}" ]; then
+    echo "ERROR: SYNOPKG_PKGDEST, PID_FILE or SERVICE_PORT is not defined. This script must be run in the context of DSM service command."
+    exit 1
+fi
+
+${SYNOPKG_PKGDEST}/bin/ympd -w ${SERVICE_PORT}
+echo "$!" > ${PID_FILE}
+