package/skeleton-init-openrc: add support for starting sysv scripts

Add an OpenRC service that starts and stops sysv-init scripts. We order
that script 'after local' so that it is started after all other native
openrc services.

Signed-off-by: Michał Łyszczek <michal.lyszczek@bofc.pl>
[yann.morin.1998@free.fr:
  - don't propagate the micro optimisation for running .sh scripts
  - use spaces, not TABs
  - stop services in reverse order
  - reword commit log
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

docs/manual/adding-packages-generic.txt

@@ -542,7 +542,10 @@ different steps of the build process.
   sysvinit, etc.), openrc or for the systemd units. These commands
   will be run only when the relevant init system is installed (i.e.
   if systemd is selected as the init system in the configuration,
-  only +LIBFOO_INSTALL_INIT_SYSTEMD+ will be run).
+  only +LIBFOO_INSTALL_INIT_SYSTEMD+ will be run). The only exception
+  is when openrc is chosen as init system and +LIBFOO_INSTALL_INIT_OPENRC+
+  has not been set, in such situation +LIBFOO_INSTALL_INIT_SYSV+ will
+  be called, since openrc supports sysv init scripts.
 
 * +LIBFOO_HELP_CMDS+ lists the actions to print the package help, which
   is included to the main +make help+ output. These commands can print

package/openrc/sysv-rcs

@@ -0,0 +1,25 @@
+#!/sbin/openrc-run
+
+description="start or stop sysv rc[S,K] scripts"
+
+depend() {
+    after local
+}
+
+start() {
+    einfo "Starting sysv rc scripts"
+    for i in /etc/init.d/S??*; do
+        # Ignore dangling symlinks (if any).
+        [ -e "$i" ] || continue
+        $i start
+    done
+}
+
+stop() {
+    einfo "Stopping sysv rc scripts"
+    for i in $(ls -r /etc/init.d/S??*); do
+        # Ignore dangling symlinks (if any).
+        [ -e "$i" ] || continue
+        $i stop
+    done
+}

package/pkg-generic.mk

@@ -338,7 +338,8 @@ $(BUILD_DIR)/%/.stamp_target_installed:
 	$(if $(BR2_INIT_SYSV)$(BR2_INIT_BUSYBOX),\
 		$($(PKG)_INSTALL_INIT_SYSV))
 	$(if $(BR2_INIT_OPENRC), \
-		$($(PKG)_INSTALL_INIT_OPENRC))
+		$(or $($(PKG)_INSTALL_INIT_OPENRC), \
+			$($(PKG)_INSTALL_INIT_SYSV)))
 	$(foreach hook,$($(PKG)_POST_INSTALL_TARGET_HOOKS),$(call $(hook))$(sep))
 	$(Q)if test -n "$($(PKG)_CONFIG_SCRIPTS)" ; then \
 		$(RM) -f $(addprefix $(TARGET_DIR)/usr/bin/,$($(PKG)_CONFIG_SCRIPTS)) ; \

package/skeleton-init-openrc/skeleton/etc/runlevels/default/sysv-rcs

@@ -0,0 +1 @@
+/etc/init.d/sysv-rcs