#!/usr/bin/python -O
# Distributed under the terms of the GNU General Public License v2
#UDev Device Helper
#Changes :
#	fixed permissions problem and misc tweaks
import sys,os,grp,pwd,commands,stat
default_perm = '660'
loaded_modules = commands.getoutput("lsmod | awk '{print $1'}").splitlines()[1:]
loaded_modules.append('none');
def parse_config(conf_file='udh.conf'):
	if not os.access(conf_file,os.F_OK) and len(sys.argv) > 1 and os.access(sys.argv[1], os.F_OK) :
		conf_file = sys.argv[1]
	f = file(conf_file,"r"); lines = f.readlines(); f.close()
	final_conf = []
	for line in lines:
		if not line.startswith('#'):
			conf = line.strip().split(',')
			temp_dict = {}
			for c in conf:
				cc = c.strip().split('=')
				temp_dict[cc[0].strip()] = cc[1].strip()
			final_conf.append(temp_dict)
	return final_conf
conf = parse_config()
for line in conf:
	try:
		if 'kernel_module' in line and line['kernel_module'] in loaded_modules and not os.access(line['dev'],os.F_OK):
			print "Making node : " + line['dev']
			if 'perm' in line : line['perm'] = default_perm
			if 'dir' in line : print "\t Making Directory : " + line['dir'] + ' ' + os.mkdir(line['dir'])
			n = line['node'].split(' ')
			os.mknod(line['dev'], stat.S_IFCHR, os.makedev( int(n[0]), int(n[1]) ) )
			#fix this...
			commands.getoutput("chmod %(p)s %(f)s" % {'p':line['perm'], 'f': line['dev']} )
			#commands.getoutput( 'mknod -m '+line['perm']+' '+line['dev']+' c '+line['node'])
			gid , uid = 0 , 0
			if 'group' in line : gid = grp.getgrnam(line['group'])[2]
			if 'user' in line : uid = pwd.getpwnam(line['user'])[2]
			os.chown(line['dev'], uid, gid)
			if 'symlink' in line : 
				print "\tCreating Symlink from %(src)s to %(dst)s" % {'src':line['dev'], 'dst':line['symlink']}
				os.symlink(line['dev'], line['symlink'])
		else:
			print 'Error : [%(e)s] isn\'t currently loaded or device already exists.' % {'e':line["kernel_module"]}
	except:
		print "Configuration : "+ str(line)+" is invalid, please check your syntax!"