From 354145cb4c260bdd7ef3dafcdae206e2d00d4d3a Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@fe.uni-lj.si>
Date: Wed, 18 May 2016 06:51:10 +0000
Subject: [PATCH] snapshot symlinked to initial_snapshot.vtu. This eliminates possibility of overwriting the configuration snapshot file in cat it is named timestep_xxxxx.vtu during the simulation.

---
 python/trisurf/trisurf.py |   21 +++++++++++++--------
 1 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/python/trisurf/trisurf.py b/python/trisurf/trisurf.py
index ce23b5f..310b4d3 100644
--- a/python/trisurf/trisurf.py
+++ b/python/trisurf/trisurf.py
@@ -199,13 +199,18 @@
 		Internal method for determining the number of the lines in the most efficient way. Is it really the most efficient?
 		'''
 		f = open(self.fullname, "r+")
-		buf = mmap.mmap(f.fileno(), 0)
-		lines = 0
-		readline = buf.readline
-		while readline():
-			lines += 1
+		try:
+			buf = mmap.mmap(f.fileno(), 0)
+			lines = 0
+			readline = buf.readline
+			while readline():
+				lines += 1
+			f.close()
+		except:
+			lines=0
+			f.close()
 		return lines
-
+		
 	def read(self):
 		'''
 		Method read() reads the statistics if it exists. It sets local variable dT storing the time differential between two intervals of simulation (outer loops). It also stores last simulation loop and the start of the run.
@@ -365,7 +370,7 @@
 						print("Error -- cannot make tapefile  "+ os.path.join(self.Dir.fullpath(),"tape")+" from the snapshot in the running directory")
 						exit(1)
 					try:
-						os.symlink(os.path.abspath(self.snapshotFile), os.path.join(self.Dir.fullpath(),self.snapshotFile))
+						os.symlink(os.path.abspath(self.snapshotFile), os.path.join(self.Dir.fullpath(),"initial_snapshot.vtu"))
 					except:
 						print("Error while symlinking "+os.path.abspath(self.snapshotFile)+" to "+os.path.join(self.Dir.fullpath(),self.snapshotFile))
 		
@@ -378,7 +383,7 @@
 			self.Dir.goto()
 			print("Starting trisurf-ng executable in "+self.Dir.fullpath())
 			if(self.fromSnapshot==True):
-				params=["trisurf", "--restore-from-vtk",self.snapshotFile]+self.runArgs
+				params=["trisurf", "--restore-from-vtk","initial_snapshot.vtu"]+self.runArgs
 			else:
 				#veify if dump exists. If not it is a first run and shoud be run with --force-from-tape
 				if(os.path.isfile("dump.bin")==False):

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