X-Git-Url: https://git.ralfj.de/saartuer.git/blobdiff_plain/79f438378491fe0059574437edfaa8389836ec4f..afd14c9b67b6fb41219abf0dcd5e7fda37a1b8a9:/tuerd?ds=inline

diff --git a/tuerd b/tuerd
index 00b2420..f679fa8 100755
--- a/tuerd
+++ b/tuerd
@@ -1,7 +1,8 @@
 #!/usr/bin/python3
-import time, socket, os, stat, atexit
+import time, socket, os, stat, atexit, errno, struct
 from datetime import datetime
 import RPi.GPIO as GPIO
+SO_PEERCRED = 17 # DO - NOT - TOUCH
 GPIO.setmode(GPIO.BOARD)
 
 # ******** definitions *********
@@ -25,8 +26,12 @@ def doNothing (conn):
 
 # delete a file, don't care if it did not exist in the first place
 def forcerm(name):
-	if os.path.exists(name):
+	try:
 		os.unlink (name)
+	except OSError as e:
+		# only ignore error if it was "file didn't exist"
+		if e.errno != errno.ENOENT:
+			raise
 
 # commands: on a pin do a series of timed on/off switches
 class Pinoutput:
@@ -85,7 +90,8 @@ sock.listen(1)
 while True:
 	# accept connections
 	conn, addr = sock.accept()
-	# TODO: use addr to determine the client for logging
+	# get peer information (TODO use it for logging)
+	(pid, uid, gid) = (struct.unpack('3i', conn.getsockopt(socket.SOL_SOCKET, SO_PEERCRED, struct.calcsize('3i'))))
 	# get some data from the client (enough to hold any valid command)
 	data = conn.recv (32)
 	# log the command