Get rid of freeze (now its own directory).

Added some new demos.  Fixed a few others.

Tools/scripts/sum5.py

@@ -0,0 +1,97 @@
+#! /usr/local/bin/python
+
+# print md5 checksum for files
+
+bufsize = 8096
+fnfilter = None
+rmode = 'r'
+
+usage = """
+usage: sum5 [-b] [-t] [-l] [-s bufsize] [file ...]
+-b        : read files in binary mode
+-t        : read files in text mode (default)
+-l        : print last pathname component only
+-s bufsize: read buffer size (default %d)
+file ...  : files to sum; '-' or no files means stdin
+""" % bufsize
+
+import sys
+import string
+import os
+import md5
+import regsub
+
+StringType = type('')
+FileType = type(sys.stdin)
+
+def sum(*files):
+	sts = 0
+	if files and type(files[-1]) == FileType:
+		out, files = files[-1], files[:-1]
+	else:
+		out = sys.stdout
+	if len(files) == 1 and type(files[0]) != StringType:
+		files = files[0]
+	for f in files:
+		if type(f) == StringType:
+			if f == '-':
+				sts = printsumfp(sys.stdin, '<stdin>', out) or sts
+			else:
+				sts = printsum(f, out) or sts
+		else:
+			sts = sum(f, out) or sts
+	return sts
+
+def printsum(file, out = sys.stdout):
+	try:
+		fp = open(file, rmode)
+	except IOError, msg:
+		sys.stderr.write('%s: Can\'t open: %s\n' % (file, msg))
+		return 1
+	if fnfilter:
+		file = fnfilter(file)
+	sts = printsumfp(fp, file, out)
+	fp.close()
+	return sts
+
+def printsumfp(fp, file, out = sys.stdout):
+	m = md5.md5()
+	try:
+		while 1:
+			data = fp.read(bufsize)
+			if not data: break
+			m.update(data)
+	except IOError, msg:
+		sys.stderr.write('%s: I/O error: %s\n' % (file, msg))
+		return 1
+	out.write('%s %s\n' % (hexify(m.digest()), file))
+	return 0
+
+def hexify(s):
+	res = ''
+	for c in s:
+		res = res + '%02x' % ord(c)
+	return res
+
+def main(args = sys.argv[1:], out = sys.stdout):
+	global fnfilter, rmode, bufsize
+	import getopt
+	try:
+		opts, args = getopt.getopt(args, 'blts:')
+	except getopt.error, msg:
+		sys.stderr.write('%s: %s\n%s' % (sys.argv[0], msg, usage))
+		return 2
+	for o, a in opts:
+		if o == '-l':
+			fnfilter = os.path.basename
+		if o == '-b':
+			rmode = 'rb'
+		if o == '-t':
+			rmode = 'r'
+		if o == '-s':
+			bufsize = string.atoi(a)
+	if not args: args = ['-']
+	return sum(args, out)
+
+if __name__ == '__main__' or __name__ == sys.argv[0]:
+	sys.exit(main(sys.argv[1:], sys.stdout))