binary = function(n) // number
	b = []
	
	while n > 0
		division = n % 2
		b.push(division)
		n = floor(n / 2)
	end while
	
	while b.len < 3
		b.push(0)
	end while
	
	b.reverse
	return b
end function

to_perm = function(n, m) // number 0 or 1, mode
	if n == 1 then
		return "+" + m
	else
		return "-" + m
	end if
end function

perm_query = function(n, c) // number, class
	b = binary(n)
	pq = []
	pq.push(c + to_perm(b[0], "r"))
	pq.push(c + to_perm(b[1], "w"))
	pq.push(c + to_perm(b[2], "x"))
	return pq
end function

if params.len < 2 or (params.len == 3 and params[0] != "-R") then exit("learn how to use chmod yourself :)")

perms = params[0]
pathFile = params[1]
isRecursive = 0

if params.len == 3 then
	perms = params[1]
	pathFile = params[2]
	isRecursive = 1
end if

u = perms[0].to_int
g = perms[1].to_int
o = perms[2].to_int

queries = []

queries = queries + perm_query(u, "u")
queries = queries + perm_query(g, "g")
queries = queries + perm_query(o, "o")

file = get_shell.host_computer.File(pathFile)
if file == null then exit("chgmod: can't find " + pathFile)

for query in queries
	output = file.chmod(query, isRecursive)
	if output then print(output)
end for