Initial move of hexdiff.py/plotter.py to modules.

src/binwalk/common.py

@@ -212,7 +212,7 @@ class BlockFile(io.FileIO):
 	# limit disk I/O, but small enough to limit the size of processed data blocks.
 	READ_BLOCK_SIZE = 1 * 1024 * 1024
 
-	def __init__(self, fname, mode='r', length=0, offset=0):
+	def __init__(self, fname, mode='r', length=0, offset=0, block=READ_BLOCK_SIZE):
 		'''
 		Class constructor.
 
@@ -255,6 +255,9 @@ class BlockFile(io.FileIO):
 		elif self.length > self.size:
 			self.length = self.size
 
+		if block > 0:
+			self.READ_BLOCK_SIZE = block
+
 		io.FileIO.__init__(self, fname, mode)
 
 		# Work around for python 2.6 where FileIO._name is not defined

src/binwalk/modules/binvis.py

@@ -57,7 +57,6 @@ class Plotter(object):
 		binwalk.module.process_kwargs(self, kwargs)
 
 		self.verbose = self.config.verbose
-		self.files = self.config.target_files
 		self.offset = self.config.offset
 		self.length = self.config.length
 		self.plane_count = -1
@@ -79,8 +78,8 @@ class Plotter(object):
 		self.window = gl.GLViewWidget()
 		self.window.opts['distance'] = self.VIEW_DISTANCE
 		
-		if len(self.files) == 1:
-			self.window.setWindowTitle(self.files[0])
+		if len(self.target_files) == 1:
+			self.window.setWindowTitle(self.target_files[0].name)
 
 	def _print(self, message):
 		'''
@@ -159,20 +158,20 @@ class Plotter(object):
 		'''
 		return (0,0,0)
 
-	def _generate_data_points(self, file_name):
+	def _generate_data_points(self, fp):
 		'''
 		Generates a dictionary of data points and their frequency of occurrance.
 
-		@file_name - The file to generate data points from.
+		@fp - The BlockFile object to generate data points from.
 
 		Returns a dictionary.
 		'''
 		i = 0
 		data_points = {}
 
-		self._print("Generating data points for %s" % file_name)
+		self._print("Generating data points for %s" % fp.name)
 
-		with BlockFile(file_name, 'r', offset=self.offset, length=self.length) as fp:
+		# We don't need any extra data from BlockFile
 		fp.MAX_TRAILING_SIZE = 0
 
 		while True:
@@ -255,8 +254,8 @@ class Plotter(object):
 			ygrid.scale(12.8, 12.8, 12.8)
 			zgrid.scale(12.8, 12.8, 12.8)
 
-		for file_name in self.files:
-			data_points = self._generate_data_points(file_name)
+		for fd in self.target_files:
+			data_points = self._generate_data_points(fd)
 
 			self._print("Generating plot points from %d data points" % len(data_points))
 

src/binwalk/modules/configuration.py

@@ -102,7 +102,7 @@ class Configuration(object):
 			Update(self.verbose).update()
 			sys.exit(0)
 
-		self._test_target_files()
+		self._open_target_files()
 		self._set_verbosity()
 
 		self.display = binwalk.display.Display(log=self.log_file,
@@ -128,7 +128,7 @@ class Configuration(object):
 		Checks if the target files can be opened.
 		Any files that cannot be opened are removed from the self.target_files list.
 		'''
-		failed_open_count = 0
+		open_files = []
 
 		# Validate the target files listed in target_files
 		for tfile in self.target_files:
@@ -136,20 +136,20 @@ class Configuration(object):
 			if not os.path.isdir(tfile):
 				# Make sure we can open the target files
 				try:
-					fd = open(tfile, "rb")
-					fd.close()
+					open_files.append(BlockFile(tfile, length=self.length, offset=self.offset))
 				except Exception as e:
 					sys.stderr.write("Cannot open file : %s\n" % str(e))
-					self.target_files.pop(self.target_files.index(tfile))
-					failed_open_count += 1
 
 		# Unless -O was specified, don't run the scan unless we are able to scan all specified files
-		if failed_open_count > 0 and not self.skip_unopened:
+		if len(open_files) != len(self.target_files) and not self.skip_unopened:
+			failed_open_count = len(self.target_files) - len(open_files)
 			if failed_open_count > 1:
 				plural = 's'
 			else:
 				plural = ''
 			raise Exception("Failed to open %d file%s for scanning" % (failed_open_count, plural))
+		else:
+			self.target_files = open_files
 
 class Update(object):
 	'''