event-handler: T3083: Extended event-handler features

* Added the ability to filter by a syslog identifier
* Added the ability to pass arguments to a script
* Added the ability to pass preconfigured environment variables to a script
* A message that triggered a script is now passed in the `message` variable and
can be used in a script
* Replaced `call()` to `run()`, since stdout are not need to be printed

1 files changed, 10 insertions, 3 deletions

diff --git a/src/conf_mode/service_event_handler.py b/src/conf_mode/service_event_handler.py
index cf4aba49b..bb12da11d 100755
--- a/src/conf_mode/service_event_handler.py
+++ b/src/conf_mode/service_event_handler.py
@@ -18,7 +18,7 @@ import json
 from pathlib import Path
 
 from vyos.config import Config
-from vyos.util import call
+from vyos.util import call, dict_search
 from vyos import ConfigError
 from vyos import airbag
 
@@ -48,9 +48,16 @@ def verify(config):
         return None
 
     for name, event_config in config.items():
-        if 'pattern' not in event_config or 'script' not in event_config:
+        if not dict_search('filter.pattern', event_config) or not dict_search(
+                'script.path', event_config):
             raise ConfigError(
-                'Event-handler: both pattern and script items are mandatory!')
+                'Event-handler: both pattern and script path items are mandatory'
+            )
+
+        if dict_search('script.environment.message', event_config):
+            raise ConfigError(
+                'Event-handler: "message" environment variable is reserved for log message text'
+            )
 
 
 def generate(config):