arch-pwm-fan.py

#!/usr/bin/python2

def set_speed(pwm, speed): 
	speed = max(0, min(100, speed))
	speed = 2.55 * speed
	speed = int(speed)

	with open("/sys/class/hwmon/hwmon1/pwm" + str(pwm), "w") as f: 
		f.write(str(speed))

import sys
import os

if len(sys.argv) == 2: 
	sys.argv.append(sys.argv[1])

if len(sys.argv) == 3: 
	if os.geteuid() != 0: 
		os.system("sudo " + " ".join(sys.argv))
	else: 
		set_speed(2, int(sys.argv[1]))
		set_speed(3, int(sys.argv[1]))
else: 
	print "fanspeed fan1 [fan2]"