Fix some race conditions

user/addon/history/_main.py

@@ -4,7 +4,9 @@ browser = mfp.require("browser")
 config = mfp.require("config")
 
 if not os.path.isdir(config.paths[0]):
-	os.makedirs(config.paths[0])
+	try:
+		os.makedirs(config.paths[0])
+	except Exception: pass
 
 fh = open(os.path.join(config.paths[0],"history.txt"),"a")
 
@@ -23,4 +25,4 @@ def onTitleChanged(obj,_):
 def onWebviewCreated(webView):
 	webView.connect("notify::title",onTitleChanged)
 	webView.connect("notify::uri",onUrlChanged)
-eventHandler["webview:created"] = onWebviewCreated
+eventHandler["webview:created"] = onWebviewCreated

user/addon/startupNewWindow/_main.py

@@ -1,32 +1,63 @@
 import sys
 import os
 import socket
-socketFile = mfp.p("/tmp",mfp.programName + ".session")
+import fcntl
+import time
+config = mfp.require("config")
 
-try: # See if socket already exists (A browser process is open)
-	s = socket.socket(socket.AF_UNIX,socket.SOCK_STREAM)
-	s.connect(socketFile)
-except Exception: # Otherwise, make our own (No browser process is open)
+if not os.path.isdir(config.paths[0]):
 	try:
-		os.remove(socketFile)
-	except: pass
-	s = socket.socket(socket.AF_UNIX,socket.SOCK_STREAM)
-	s.bind(socketFile)
-	s.listen(65535)
-else:
-	if len(sys.argv) < 2:
-		uri = "about:blank"
+		os.makedirs(config.paths[0])
+	except Exception:
+		pass
+
+lockFile = mfp.p(config.paths[0],"session.lock")
+socketFile = mfp.p(config.paths[0],"session.socket")
+
+tries = 1
+while tries <= 10:
+	print("Opening new window, try " +str(tries)+ " ...")
+	host = True
+	try:
+		lockFileHandle = open(lockFile,"w")
+		fcntl.flock(lockFileHandle,fcntl.LOCK_EX | fcntl.LOCK_NB)
+	except Exception as e:
+		host = False
+	
+	if host:
+		try:
+			os.remove(socketFile)
+		except: pass
+		
+		s = socket.socket(socket.AF_UNIX,socket.SOCK_STREAM)
+		s.bind(socketFile)
+		s.listen(65535)
+		break
 	else:
-		uri = sys.argv[1]
-	s.send((uri + "\n").encode("utf-8"))
-	sys.exit(0)
+		try:
+			s = socket.socket(socket.AF_UNIX,socket.SOCK_STREAM)
+			s.connect(socketFile)
+			if len(sys.argv) < 2:
+				uri = "about:blank"
+			else:
+				uri = sys.argv[1]
+			s.send((uri + "\n").encode("utf-8"))
+			print("Successfully merged into pre-existing process, exiting.")
+			sys.exit(0)
+		except Exception as e:
+			print(e)
+	tries += 1
+	time.sleep(1)
+
+if tries >= 11:
+	print("Could not acquire new window from pre-existing process.")
+	sys.exit(1)
 
 import gi
 gi.require_version('Gtk', '3.0')
 from gi.repository import GLib
 import threading
 import queue
-import time
 browser = mfp.require("browser")
 browserWindow = browser.module.require(mfp.p("window","browser.py"))