rpi-userland: Fix vcfiled startup

The VideoCore file server daemon startup script installed from this package is
not compatible with BuildRoot (because of its naming and other Debian
dependencies), which prevented vcfiled from starting. Hence, prevent this
package from installing its vcfiled startup script, and add a configuration
option to install a vcfiled SysV init script suitable for BuildRoot.

[Peter: tweak help text as suggested by Yann]
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Reviewed-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/rpi-userland/Config.in

@@ -31,6 +31,13 @@ config BR2_PACKAGE_PROVIDES_LIBOPENVG
 config BR2_PACKAGE_PROVIDES_LIBOPENMAX
 	default "rpi-userland"
 
+config BR2_PACKAGE_RPI_USERLAND_START_VCFILED
+	bool "Start vcfiled"
+	depends on BR2_INIT_SYSV || BR2_INIT_BUSYBOX
+	help
+	  vcfiled is a daemon serving files to VideoCore from the host file
+	  system.
+
 endif
 
 comment "rpi-userland needs a toolchain w/ C++, largefile, threads"

package/rpi-userland/S94vcfiled

@@ -0,0 +1,47 @@
+#!/bin/sh
+
+NAME=vcfiled
+DESC="VideoCore file server daemon $NAME"
+DAEMON="/usr/sbin/$NAME"
+DAEMON_ARGS=""
+CFGFILE="/etc/default/$NAME"
+PIDFILE="/var/run/$NAME.pid"
+
+# Read configuration variable file if it is present
+[ -r "$CFGFILE" ] && . "$CFGFILE"
+
+do_start()
+{
+	echo -n "Starting $DESC: "
+	start-stop-daemon -S -q -p "$PIDFILE" -x "$DAEMON" -- $DAEMON_ARGS &&
+			echo "done" || echo "failed"
+}
+
+do_stop()
+{
+	echo -n "Stopping $DESC: "
+	if start-stop-daemon -K -q -R TERM/30/KILL/5 -p "$PIDFILE" -n "$NAME"; then
+		# This daemon does not remove its PID file when it exits.
+		rm -f "$PIDFILE"
+		echo "done"
+	else
+		echo "failed"
+	fi
+}
+
+case "$1" in
+	start)
+		do_start
+		;;
+	stop)
+		do_stop
+		;;
+	restart|reload)
+		do_stop
+		do_start
+		;;
+	*)
+		echo "Usage: $0 {start|stop|restart|reload}" >&2
+		exit 1
+		;;
+esac

package/rpi-userland/rpi-userland.mk

@@ -9,11 +9,22 @@ RPI_USERLAND_SITE = $(call github,raspberrypi,userland,$(RPI_USERLAND_VERSION))
 RPI_USERLAND_LICENSE = BSD-3c
 RPI_USERLAND_LICENSE_FILES = LICENCE
 RPI_USERLAND_INSTALL_STAGING = YES
-RPI_USERLAND_CONF_OPT = -DVMCS_INSTALL_PREFIX=/usr
+RPI_USERLAND_CONF_OPT = -DVMCS_INSTALL_PREFIX=/usr \
+	-DCMAKE_C_FLAGS="-DVCFILED_LOCKFILE=\\\"/var/run/vcfiled.pid\\\""
 
 RPI_USERLAND_PROVIDES = libegl libgles libopenmax libopenvg
 
+ifeq ($(BR2_PACKAGE_RPI_USERLAND_START_VCFILED),y)
+define RPI_USERLAND_INSTALL_INIT_SYSV
+	$(INSTALL) -m 0755 -D package/rpi-userland/S94vcfiled \
+			$(TARGET_DIR)/etc/init.d/S94vcfiled
+endef
+endif
+
 define RPI_USERLAND_POST_TARGET_CLEANUP
+	rm -f $(TARGET_DIR)/etc/init.d/vcfiled
+	rm -f $(TARGET_DIR)/usr/share/install/vcfiled
+	rmdir --ignore-fail-on-non-empty $(TARGET_DIR)/usr/share/install
 	rm -Rf $(TARGET_DIR)/usr/src
 endef
 RPI_USERLAND_POST_INSTALL_TARGET_HOOKS += RPI_USERLAND_POST_TARGET_CLEANUP