busybox: sysntpd: make use of new ubus hotplug.ntp object

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

package/utils/busybox/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=busybox
 PKG_VERSION:=1.31.1
-PKG_RELEASE:=8
+PKG_RELEASE:=9
 PKG_FLAGS:=essential
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
@@ -145,8 +145,9 @@ endif
 ifneq ($(CONFIG_BUSYBOX_$(BUSYBOX_SYM)_NTPD),)
 	$(INSTALL_BIN) ./files/sysntpd $(1)/etc/init.d/sysntpd
 	$(INSTALL_BIN) ./files/ntpd-hotplug $(1)/usr/sbin/ntpd-hotplug
-	$(INSTALL_DIR) $(1)/etc/capabilities/
+	$(INSTALL_DIR) $(1)/etc/capabilities $(1)/usr/share/acl.d
 	$(INSTALL_DATA) ./files/ntpd.capabilities $(1)/etc/capabilities/ntpd.json
+	$(INSTALL_DATA) ./files/ntpd_acl.json $(1)/usr/share/acl.d/ntpd.json
 endif
 	-rm -rf $(1)/lib64
 endef

package/utils/busybox/files/ntpd-hotplug

@@ -1,2 +1,12 @@
 #!/bin/sh
-ACTION="$1" /sbin/hotplug-call ntp
+
+. /usr/share/libubox/jshn.sh
+
+addenv="$( env | while read line; do echo "json_add_string \"\" \"$line\";"; done )"
+json_init
+json_add_array env
+json_add_string "" "ACTION=$1"
+eval "$addenv"
+json_close_array env
+
+ubus call hotplug.ntp call "$(json_dump)"

package/utils/busybox/files/ntpd_acl.json

@@ -0,0 +1,8 @@
+{
+	"user": "ntp",
+	"access": {
+		"hotplug.ntp": {
+			"methods": [ "call" ]
+		}
+	}
+}

package/utils/busybox/files/sysntpd

@@ -56,7 +56,12 @@ start_ntpd_instance() {
 	done
 	procd_set_param respawn
 	[ -x /sbin/ujail -a -e /etc/capabilities/ntpd.json ] && {
-		procd_add_jail ntpd
+		procd_add_jail ntpd ubus
+		procd_add_jail_mount "$HOTPLUG_SCRIPT"
+		procd_add_jail_mount "/usr/share/libubox/jshn.sh"
+		procd_add_jail_mount "/usr/bin/env"
+		procd_add_jail_mount "/usr/bin/jshn"
+		procd_add_jail_mount "/bin/ubus"
 		procd_set_param capabilities /etc/capabilities/ntpd.json
 		procd_set_param user ntp
 		procd_set_param group ntp