CmdLine Google Search Results in New Firefox Tab

#!/usr/bin/env python

# Google Command Line Search using Firefox
# ...opens results in New Tab
# ...If this script is ran as root, we will use su to try to run firefox
#    as the regular logged-on user, because if firefox is already
#    running it was probably ran by the regular user, and 
#    'firefox -new-tab' will not work correctly if ran by root when
#    normal user's firefox is already open. does that make sense?
#    (it opens a second firefox window, and we don't want that)
#    
# -Christopher Joseph Welborn (cjwelborn@gmail.com) 2012

# Imports
import urllib   # for making URL's compatible
import os       # for getting User ID
import sys      # for getting arguments
import commands # for getting logged in user (not user that ran the script)

# Get normally logged on user (hopefully not root)
str_user = os.environ["USER"]
# If we got root we need to try one more thing to get a normal user
if str_user == "root":
	# get output of shell command 'users'
	str_usercmd = commands.getoutput('users')
	# get list of all users logged into desktop
	str_users = str_usercmd.split(" ")
	# go until we find one that is not root?
	for u in str_users:
		if u != "root":
			# we found one that isn't root, so save it.
			str_user = u
	
# Pre Firefox Command (hopefully, to make sure we're not running as root)
str_precmd = "su " + str_user + " -c "
# Initialize Search String
str_searchterm = ""

#-----------------------------------------------------------------------		
# FIREFOX SEARCH                                                 FIREFOX
def search_firefox():
	
	# build Shell command with URL and SearchTerm
	sCmd = "firefox -new-tab http://www.google.com/search?hl=en#q=\"" + str_searchterm + "\""

	# Running as root? Fix the command to use SU to CJ...
	if os.geteuid() == 0:
		# Status
		print "Currently running as root, using su to " + str_user + "..."
		# Add SU to CJ, and enclose regular command in ' 's
		sCmd = str_precmd + "'" + sCmd + "'"

	# Shell firefox with our google search URL
	try:
		iret = os.system(sCmd)
	except:
		print "Error running command: " + sCmd
	
	# firefox exit status?
	if iret > 0:
		print "Firefox exited with status: " + str(iRet)
	
	#Finished
	print "Finished..."
	return 0
		
#-----------------------------------------------------------------------		
# START OF SCRIPT                                                  START
if __name__ == '__main__':
		
	# Check Arguments
	if len(sys.argv) < 2:
		print "No search term entered!"
		exit()
		
	# root warning...
	if str_user == "root":
		print "You are currently running as root," \
			  " this may not work properly."
			  
	# Get first search argument
	str_searchterm = sys.argv[1]

	# Cycle thru all arguments	
	for i in range(len(sys.argv)):
		# don't count scriptname as argument ( >1)
		if i > 1:
			# insert space before everything but the first item
			str_searchterm = str_searchterm + " " + sys.argv[i]

	# Status
	print "Searching For \"" + str_searchterm + "\"..."

	# Fix Search Term URL
	str_searchterm = urllib.quote(str_searchterm)

	# Do firefox Search, by default right now
	search_firefox()