#! /usr/bin/python
"""
	Name		: lpq.py
	Author		: David Boddie
	Created		: Tue 08th August 2000
	Last modified	: Thu 06th September 2001
	Purpose		: Print information on the line printer queue.
"""

import os, socket, string, sys

def find_switch(l, switch):

	j = -1

	for i in range(0, len(l)):
		if l[i] == switch:
			if i+1 < len(l):
				return (l[i], l[i+1])
			else:
				return (l[i], None)
		elif l[i][:len(switch)] == switch:
			return l[i][:len(switch)], l[i][len(switch):]

	return (None, None)


def remove_switch(l, switch, args = 0):

	argv = []

	i = 0
	while i < len(l):

		if l[i] == switch:
			i = i + args + 1
		elif l[i][:len(switch)] == switch:
			i = i + args
		else:
			argv.append(l[i])
			i = i + 1

	return argv


def getenv(var):

	if sys.platform == 'RISCOS':

		return os.getenv(var)
	else:
		try:
			return os.environ[var]
		except KeyError:
			return None


# Main

if len(sys.argv) == 0:
	print 'lpq [-l] [-Pprinter] [user]'
	sys.exit(0)

argv = sys.argv[1:]

l, full_info = find_switch(argv, "-l")
P, printer = find_switch(argv, "-P")

# Remove the switches and arguments from the list
argv = remove_switch(argv, "-P", 1)
argv = remove_switch(argv, "-l", 0)

# What remains must be the user
if len(argv) > 0:
	user = argv[-1]
else:
	user = ""

if printer == None:
	printer = getenv('PRINTER')

if printer == None:
	print 'No default printer specified: use system variable PRINTER or the -P switch'
	sys.exit(0)

printer = string.strip(printer)

server = getenv('PRINTER_SERVER')

if server == None:
	print 'No printer server specified: use system variable PRINTER_SERVER'
	sys.exit(0)

server = string.strip(server)

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

#bound = 0
#for port in range(721,732):
#
#	try:
#		s.bind((socket.gethostname(), port))
#		bound = 1
#		break
#	except:
#		pass
#
#if bound == 0:
#	print "Could not bind socket to port."
#	sys.exit(0)

s.connect((server, 515))

if l == None:
	send_string = "\003"+printer+" "+user+"\012"
else:
	send_string = "\004"+printer+" "+user+"\012"

s.send(send_string)

data = s.recv(1024)

s.close()

lines = string.split(data, "\012")

for i in lines:
	print string.expandtabs(i, 12)

sys.exit(0)