[PATCH 5/5] procd: add api wrapper

[Florian Eckert]

This commit add a wrapper for procd services, to add a callback script
if the "service.restart" trigger event was fired.

Example:

service_trigger() {
	procd_add_trigger
	procd_add service_trigger "service.restart" "firewall" <script>
	procd_close_trigger
}

If the firewall was restart, then the stored script gets executed.

Signed-off-by: Florian Eckert <fe at dev.tdt.de>
---
 package/system/procd/files/procd.sh | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/package/system/procd/files/procd.sh b/package/system/procd/files/procd.sh
index d86b7219da..9076ddba5d 100644
--- a/package/system/procd/files/procd.sh
+++ b/package/system/procd/files/procd.sh
@@ -329,6 +329,28 @@ _procd_add_config_trigger() {
 	json_close_array
 }
 
+_procd_add_service_trigger() {
+	json_add_array
+	_procd_add_array_data "$1"
+	shift
+
+	json_add_array
+	_procd_add_array_data "if"
+
+	json_add_array
+	_procd_add_array_data "eq" "service" "$1"
+	shift
+	json_close_array
+
+	json_add_array
+	_procd_add_array_data "run_script" "$@"
+	json_close_array
+
+	json_close_array
+	_procd_add_timeout
+	json_close_array
+}
+
 _procd_add_raw_trigger() {
 	json_add_array
 	_procd_add_array_data "$1"
@@ -559,6 +581,7 @@ _procd_wrapper \
 	procd_add_instance \
 	procd_add_raw_trigger \
 	procd_add_config_trigger \
+	procd_add_service_trigger \
 	procd_add_interface_trigger \
 	procd_add_reload_trigger \
 	procd_add_reload_interface_trigger \
-- 
2.20.1