X-Git-Url: https://git.ralfj.de/saartuer.git/blobdiff_plain/f821d08610f37224ff13df938715da4438592907..fce36f5a8b88722b94b7c60266fb0fc72b2bc10c:/libtuer.py

diff --git a/libtuer.py b/libtuer.py
index 097a25a..835bf6d 100644
--- a/libtuer.py
+++ b/libtuer.py
@@ -10,7 +10,8 @@ printLevel  = logging.DEBUG
 
 # Mail logging handler
 def sendeMail(subject, text, receivers, sender='sphinx@hacksaar.de', replyTo=None):
-	if not isinstance(type(receivers), list): receivers = [receivers]
+	assert isinstance(receivers, list)
+	if not len(receivers): return # nothing to do
 	# construct content
 	msg = email.mime.text.MIMEText(text.encode('UTF-8'), 'plain', 'UTF-8')
 	msg['Subject'] = subject
@@ -57,16 +58,26 @@ class Logger:
 
 logger = Logger()
 
+# run a Python command asynchronously
+def fire_and_forget(f):
+	def _fire_and_forget():
+		try:
+			f()
+		except Exception as e:
+			logger.critical("fire_and_forget: Got exception out of callback: %s" % str(e))
+			logger.debug(traceback.format_exc())
+	t = threading.Thread(target=_fire_and_forget)
+	t.start()
+
 # run a command asynchronously and log the return value if not 0
 # prefix must be a string identifying the code position where the call came from
-def fire_and_forget (cmd, log, prefix):
-	def _fire_and_forget ():
+def fire_and_forget_cmd (cmd, log, prefix):
+	def _fire_and_forget_cmd ():
 		with open("/dev/null", "w") as fnull:
 			retcode = subprocess.call(cmd, stdout=fnull, stderr=fnull)
 			if retcode is not 0:
 				logger.error("%sReturn code %d at command: %s" % (prefix,retcode,str(cmd)))
-	t = threading.Thread(target=_fire_and_forget)
-	t.start()
+	fire_and_forget(_fire_and_forget_cmd)
 
 # Threaded callback class
 class ThreadFunction():