From c07745d79ca58b526b6d16cefc94b3ff0520df52 Mon Sep 17 00:00:00 2001
From: clinton-hall <fock_wulf@hotmail.com>
Date: Fri, 30 Jan 2015 12:30:20 +1030
Subject: [PATCH] use socket to verify if running on Linux. Fixes #638 #588

---
 nzbtomedia/__init__.py       | 3 ++-
 nzbtomedia/nzbToMediaUtil.py | 8 ++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/nzbtomedia/__init__.py b/nzbtomedia/__init__.py
index 2322ee47..fb47a4bf 100644
--- a/nzbtomedia/__init__.py
+++ b/nzbtomedia/__init__.py
@@ -18,6 +18,7 @@ APP_NAME = os.path.basename(APP_FILENAME)
 LOG_DIR = os.path.join(PROGRAM_DIR, 'logs')
 LOG_FILE = os.path.join(LOG_DIR, 'nzbtomedia.log')
 PID_FILE = os.path.join(LOG_DIR, 'nzbtomedia.pid')
+LOCK_SOCKET = None
 CONFIG_FILE = os.path.join(PROGRAM_DIR, 'autoProcessMedia.cfg')
 CONFIG_SPEC_FILE = os.path.join(PROGRAM_DIR, 'autoProcessMedia.cfg.spec')
 CONFIG_MOVIE_FILE = os.path.join(PROGRAM_DIR, 'autoProcessMovie.cfg')
@@ -198,7 +199,7 @@ def initialize(section=None):
         TRANSMISSIONHOST, TRANSMISSIONPORT, TRANSMISSIONPWD, TRANSMISSIONUSR, COMPRESSEDCONTAINER, MEDIACONTAINER, \
         METACONTAINER, SECTIONS, ALL_FORKS, TEST_FILE, GENERALOPTS, LOG_GIT, GROUPS, SEVENZIP, CONCAT, VCRF, \
         __INITIALIZED__, AUTO_UPDATE, APP_FILENAME, USER_DELAY, APP_NAME, TRANSCODE, DEFAULTS, GIT_PATH, GIT_USER, \
-        GIT_BRANCH, GIT_REPO, SYS_ENCODING, NZB_CLIENTAGENT, SABNZBDHOST, SABNZBDPORT, SABNZBDAPIKEY, \
+        GIT_BRANCH, GIT_REPO, SYS_ENCODING, NZB_CLIENTAGENT, SABNZBDHOST, SABNZBDPORT, SABNZBDAPIKEY, LOCK_SOCKET, \
         DUPLICATE, IGNOREEXTENSIONS, VEXTENSION, OUTPUTVIDEOPATH, PROCESSOUTPUT, VCODEC, VCODEC_ALLOW, VPRESET, \
         VFRAMERATE, LOG_DB, VBITRATE, VRESOLUTION, ALANGUAGE, AINCLUDE, ACODEC, ACODEC_ALLOW, ABITRATE, \
         ACODEC2, ACODEC2_ALLOW, ABITRATE2, ACODEC3, ACODEC3_ALLOW, ABITRATE3, ALLOWSUBS, SEXTRACT, SEMBED, SLANGUAGES, \
diff --git a/nzbtomedia/nzbToMediaUtil.py b/nzbtomedia/nzbToMediaUtil.py
index 151aeb1b..0f21f50b 100644
--- a/nzbtomedia/nzbToMediaUtil.py
+++ b/nzbtomedia/nzbToMediaUtil.py
@@ -1143,6 +1143,14 @@ class PosixProcess():
         self.pidpath = nzbtomedia.PID_FILE
 
     def alreadyrunning(self):
+        try:
+            nzbtomedia.LOCK_SOCKET = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
+            nzbtomedia.LOCK_SOCKET.bind('\0' + 'nzbtomedia')
+            return False
+        except socket.error as e:
+            if "Address already in use" in e:
+                return True
+        except AttributeError: pass
         if os.path.exists(self.pidpath):
             # Make sure it is not a "stale" pidFile
             try: