dd wrapper to avoid mistakes

cc

#!/usr/bin/python 

import sys
import subprocess

def usage():
		return "  \n Misssing config file, you must create a file called ~/.blocklist-dd and insert which device dd should avoid \n\n \
Ex: \n \
$ echo \"/dev/sda\" > ~/.blocklist-dd \n  \
$ echo \"/dev/sdb\" >> ~/.blocklist-dd \n  \
" 

try:
	f = open("~/.blocklist-dd","r")
except:
	print usage()
	sys.exit(0)

pattern = f.readlines()
f.close()

for p in pattern:
	for param in sys.argv:
			if param.find(p[:-1]) != -1: 
				print "ooops, you are associating a blocked device (%s) on dd, proceed? (Y/n) (Y/n)" % p[:-1] 
				op = raw_input()
				if op != "Y":
					sys.exit(0) 

sys.argv[0] = "dd"
subprocess.call(sys.argv)