s3cmd

#!/usr/bin/env python

## Amazon S3 manager
## Author: Michal Ludvig <michal@logix.cz>
##         http://www.logix.cz/michal
## License: GPL Version 2

import sys

if float("%d.%d" %(sys.version_info[0], sys.version_info[1])) < 2.4:
	sys.stderr.write("ERROR: Python 2.4 or higher required, sorry.\n")
	sys.exit(1)

import logging
import time
import os
import re
import errno
import glob
import traceback
import codecs
import locale
import subprocess
import htmlentitydefs

from copy import copy
from optparse import OptionParser, Option, OptionValueError, IndentedHelpFormatter
from logging import debug, info, warning, error
from distutils.spawn import find_executable

def output(message):
	sys.stdout.write(message + "\n")

def check_args_type(args, type, verbose_type):
	for arg in args:
		if S3Uri(arg).type != type:
			raise ParameterError("Expecting %s instead of '%s'" % (verbose_type, arg))

def _fswalk_follow_symlinks(path):
        '''
        Walk filesystem, following symbolic links (but without recursion), on python2.4 and later

        If a recursive directory link is detected, emit a warning and skip.
        '''
        assert os.path.isdir(path) # only designed for directory argument
        walkdirs = set([path])
        targets = set()
        for dirpath, dirnames, filenames in os.walk(path):
                for dirname in dirnames:
                        current = os.path.join(dirpath, dirname)
                        target = os.path.realpath(current)
                        if os.path.islink(current):
                                if target in targets:
                                        warning("Skipping recursively symlinked directory %s" % dirname)
                                else:
                                        walkdirs.add(current)
                        targets.add(target)
        for walkdir in walkdirs:
                for value in os.walk(walkdir):
                        yield value

def fswalk(path, follow_symlinks):
        '''
        Directory tree generator

        path (str) is the root of the directory tree to walk

        follow_symlinks (bool) indicates whether to descend into symbolically linked directories
        '''
        if follow_symlinks:
                return _fswalk_follow_symlinks(path)
        return os.walk(path)

def cmd_du(args):
	s3 = S3(Config())
	if len(args) > 0:
		uri = S3Uri(args[0])
		if uri.type == "s3" and uri.has_bucket():
			subcmd_bucket_usage(s3, uri)
			return
	subcmd_bucket_usage_all(s3)

def subcmd_bucket_usage_all(s3):
	response = s3.list_all_buckets()

	buckets_size = 0
	for bucket in response["list"]:
		size = subcmd_bucket_usage(s3, S3Uri("s3://" + bucket["Name"]))
		if size != None:
			buckets_size += size
	total_size, size_coeff = formatSize(buckets_size, Config().human_readable_sizes)
	total_size_str = str(total_size) + size_coeff 
	output(u"".rjust(8, "-"))
	output(u"%s Total" % (total_size_str.ljust(8)))

def subcmd_bucket_usage(s3, uri):
	bucket = uri.bucket()
	object = uri.object()

	if object.endswith('*'):
		object = object[:-1]
	try:
		response = s3.bucket_list(bucket, prefix = object, recursive = True)
	except S3Error, e:
		if S3.codes.has_key(e.info["Code"]):
			error(S3.codes[e.info["Code"]] % bucket)
			return
		else:
			raise
	bucket_size = 0
	for object in response["list"]:
		size, size_coeff = formatSize(object["Size"], False)
		bucket_size += size
	total_size, size_coeff = formatSize(bucket_size, Config().human_readable_sizes)
	total_size_str = str(total_size) + size_coeff 
	output(u"%s %s" % (total_size_str.ljust(8), uri))
	return bucket_size

def cmd_ls(args):
	s3 = S3(Config())
	if len(args) > 0:
		uri = S3Uri(args[0])
		if uri.type == "s3" and uri.has_bucket():
			subcmd_bucket_list(s3, uri)
			return
	subcmd_buckets_list_all(s3)

def cmd_buckets_list_all_all(args):
	s3 = S3(Config())

	response = s3.list_all_buckets()

	for bucket in response["list"]:
		subcmd_bucket_list(s3, S3Uri("s3://" + bucket["Name"]))
		output(u"")


def subcmd_buckets_list_all(s3):
	response = s3.list_all_buckets()
	for bucket in response["list"]:
		output(u"%s  s3://%s" % (
			formatDateTime(bucket["CreationDate"]),
			bucket["Name"],
			))

def subcmd_bucket_list(s3, uri):
	bucket = uri.bucket()
	prefix = uri.object()

	debug(u"Bucket 's3://%s':" % bucket)
	if prefix.endswith('*'):
		prefix = prefix[:-1]
	try:
		response = s3.bucket_list(bucket, prefix = prefix)
	except S3Error, e:
		if S3.codes.has_key(e.info["Code"]):
			error(S3.codes[e.info["Code"]] % bucket)
			return
		else:
			raise

	if cfg.list_md5:
		format_string = u"%(timestamp)16s %(size)9s%(coeff)1s  %(md5)32s  %(uri)s"
	else:
		format_string = u"%(timestamp)16s %(size)9s%(coeff)1s  %(uri)s"

	for prefix in response['common_prefixes']:
		output(format_string % {
			"timestamp": "",
			"size": "DIR",
			"coeff": "",
			"md5": "",
			"uri": uri.compose_uri(bucket, prefix["Prefix"])})

	for object in response["list"]:
		size, size_coeff = formatSize(object["Size"], Config().human_readable_sizes)
		output(format_string % {
			"timestamp": formatDateTime(object["LastModified"]),
			"size" : str(size), 
			"coeff": size_coeff,
			"md5" : object['ETag'].strip('"'),
			"uri": uri.compose_uri(bucket, object["Key"]),
			})

def cmd_bucket_create(args):
	s3 = S3(Config())
	for arg in args:
		uri = S3Uri(arg)
		if not uri.type == "s3" or not uri.has_bucket() or uri.has_object():
			raise ParameterError("Expecting S3 URI with just the bucket name set instead of '%s'" % arg)
		try:
			response = s3.bucket_create(uri.bucket(), cfg.bucket_location)
			output(u"Bucket '%s' created" % uri.uri())
		except S3Error, e:
			if S3.codes.has_key(e.info["Code"]):
				error(S3.codes[e.info["Code"]] % uri.bucket())
				return
			else:
				raise

def cmd_bucket_delete(args):
	def _bucket_delete_one(uri):
		try:
			response = s3.bucket_delete(uri.bucket())
		except S3Error, e:
			if e.info['Code'] == 'BucketNotEmpty' and (cfg.force or cfg.recursive):
				warning(u"Bucket is not empty. Removing all the objects from it first. This may take some time...")
				subcmd_object_del_uri(uri.uri(), recursive = True)
				return _bucket_delete_one(uri)
			elif S3.codes.has_key(e.info["Code"]):
				error(S3.codes[e.info["Code"]] % uri.bucket())
				return
			else:
				raise
		
	s3 = S3(Config())
	for arg in args:
		uri = S3Uri(arg)
		if not uri.type == "s3" or not uri.has_bucket() or uri.has_object():
			raise ParameterError("Expecting S3 URI with just the bucket name set instead of '%s'" % arg)
		_bucket_delete_one(uri)
		output(u"Bucket '%s' removed" % uri.uri())

def fetch_local_list(args, recursive = None):
	local_uris = []
	local_list = SortedDict(ignore_case = False)
	single_file = False

	if type(args) not in (list, tuple):
		args = [args]

	if recursive == None:
		recursive = cfg.recursive

	for arg in args:
		uri = S3Uri(arg)
		if not uri.type == 'file':
			raise ParameterError("Expecting filename or directory instead of: %s" % arg)
		if uri.isdir() and not recursive:
			raise ParameterError("Use --recursive to upload a directory: %s" % arg)
		local_uris.append(uri)

	for uri in local_uris:
		list_for_uri, single_file = _get_filelist_local(uri)
		local_list.update(list_for_uri)

	## Single file is True if and only if the user 
	## specified one local URI and that URI represents
	## a FILE. Ie it is False if the URI was of a DIR
	## and that dir contained only one FILE. That's not
	## a case of single_file==True.
	if len(local_list) > 1:
		single_file = False

	return local_list, single_file

def fetch_remote_list(args, require_attribs = False, recursive = None):
	remote_uris = []
	remote_list = SortedDict(ignore_case = False)

	if type(args) not in (list, tuple):
		args = [args]

	if recursive == None:
		recursive = cfg.recursive

	for arg in args:
		uri = S3Uri(arg)
		if not uri.type == 's3':
			raise ParameterError("Expecting S3 URI instead of '%s'" % arg)
		remote_uris.append(uri)

	if recursive:
		for uri in remote_uris:
			objectlist = _get_filelist_remote(uri)
			for key in objectlist:
				remote_list[key] = objectlist[key]
	else:
		for uri in remote_uris:
			uri_str = str(uri)
			## Wildcards used in remote URI?
			## If yes we'll need a bucket listing...
			if uri_str.find('*') > -1 or uri_str.find('?') > -1:
				first_wildcard = uri_str.find('*')
				first_questionmark = uri_str.find('?')
				if first_questionmark > -1 and first_questionmark < first_wildcard:
					first_wildcard = first_questionmark
				prefix = uri_str[:first_wildcard]
				rest = uri_str[first_wildcard+1:]
				## Only request recursive listing if the 'rest' of the URI,
				## i.e. the part after first wildcard, contains '/'
				need_recursion = rest.find('/') > -1
				objectlist = _get_filelist_remote(S3Uri(prefix), recursive = need_recursion)
				for key in objectlist:
					## Check whether the 'key' matches the requested wildcards
					if glob.fnmatch.fnmatch(objectlist[key]['object_uri_str'], uri_str):
						remote_list[key] = objectlist[key]
			else:
				## No wildcards - simply append the given URI to the list
				key = os.path.basename(uri.object())
				if not key:
					raise ParameterError(u"Expecting S3 URI with a filename or --recursive: %s" % uri.uri())
				remote_item = {
					'base_uri': uri,
					'object_uri_str': unicode(uri),
					'object_key': uri.object()
				}
				if require_attribs:
					response = S3(cfg).object_info(uri)
					remote_item.update({
					'size': int(response['headers']['content-length']),
					'md5': response['headers']['etag'].strip('"\''),
					'timestamp' : Utils.dateRFC822toUnix(response['headers']['date'])
					})
				remote_list[key] = remote_item
	return remote_list

def cmd_object_put(args):
	cfg = Config()
	s3 = S3(cfg)

	if len(args) == 0:
		raise ParameterError("Nothing to upload. Expecting a local file or directory and a S3 URI destination.")

	## Normalize URI to convert s3://bkt to s3://bkt/ (trailing slash)
	destination_base_uri = S3Uri(args.pop())
	if destination_base_uri.type != 's3':
		raise ParameterError("Destination must be S3Uri. Got: %s" % destination_base_uri)
	destination_base = str(destination_base_uri)

	if len(args) == 0:
		raise ParameterError("Nothing to upload. Expecting a local file or directory.")

	local_list, single_file_local = fetch_local_list(args)

	local_list, exclude_list = _filelist_filter_exclude_include(local_list)

	local_count = len(local_list)

	info(u"Summary: %d local files to upload" % local_count)

	if local_count > 0:
		if not destination_base.endswith("/"):
			if not single_file_local:
				raise ParameterError("Destination S3 URI must end with '/' (ie must refer to a directory on the remote side).")
			local_list[local_list.keys()[0]]['remote_uri'] = unicodise(destination_base)
		else:
			for key in local_list:
				local_list[key]['remote_uri'] = unicodise(destination_base + key)

	if cfg.dry_run:
		for key in exclude_list:
			output(u"exclude: %s" % unicodise(key))
		for key in local_list:
			output(u"upload: %s -> %s" % (local_list[key]['full_name_unicode'], local_list[key]['remote_uri']))

		warning(u"Exitting now because of --dry-run")
		return

	seq = 0
	for key in local_list:
		seq += 1

		uri_final = S3Uri(local_list[key]['remote_uri'])

		extra_headers = copy(cfg.extra_headers)
		full_name_orig = local_list[key]['full_name']
		full_name = full_name_orig
		seq_label = "[%d of %d]" % (seq, local_count)
		if Config().encrypt:
			exitcode, full_name, extra_headers["x-amz-meta-s3tools-gpgenc"] = gpg_encrypt(full_name_orig)
		try:
			response = s3.object_put(full_name, uri_final, extra_headers, extra_label = seq_label)
		except S3UploadError, e:
			error(u"Upload of '%s' failed too many times. Skipping that file." % full_name_orig)
			continue
		except InvalidFileError, e:
			warning(u"File can not be uploaded: %s" % e)
			continue
		speed_fmt = formatSize(response["speed"], human_readable = True, floating_point = True)
		if not Config().progress_meter:
			output(u"File '%s' stored as '%s' (%d bytes in %0.1f seconds, %0.2f %sB/s) %s" %
				(unicodise(full_name_orig), uri_final, response["size"], response["elapsed"], 
				speed_fmt[0], speed_fmt[1], seq_label))
		if Config().acl_public:
			output(u"Public URL of the object is: %s" %
				(uri_final.public_url()))
		if Config().encrypt and full_name != full_name_orig:
			debug(u"Removing temporary encrypted file: %s" % unicodise(full_name))
			os.remove(full_name)

def cmd_object_get(args):
	cfg = Config()
	s3 = S3(cfg)

	## Check arguments:
	## if not --recursive:
	##   - first N arguments must be S3Uri
	##   - if the last one is S3 make current dir the destination_base
	##   - if the last one is a directory:
	##       - take all 'basenames' of the remote objects and
	##         make the destination name be 'destination_base'+'basename'
	##   - if the last one is a file or not existing:
	##       - if the number of sources (N, above) == 1 treat it
	##         as a filename and save the object there.
	##       - if there's more sources -> Error
	## if --recursive:
	##   - first N arguments must be S3Uri
	##       - for each Uri get a list of remote objects with that Uri as a prefix
	##       - apply exclude/include rules
	##       - each list item will have MD5sum, Timestamp and pointer to S3Uri
	##         used as a prefix.
	##   - the last arg may be a local directory - destination_base
	##   - if the last one is S3 make current dir the destination_base
	##   - if the last one doesn't exist check remote list:
	##       - if there is only one item and its_prefix==its_name 
	##         download that item to the name given in last arg.
	##       - if there are more remote items use the last arg as a destination_base
	##         and try to create the directory (incl. all parents).
	##
	## In both cases we end up with a list mapping remote object names (keys) to local file names.

	## Each item will be a dict with the following attributes
	# {'remote_uri', 'local_filename'}
	download_list = []

	if len(args) == 0:
		raise ParameterError("Nothing to download. Expecting S3 URI.")

	if S3Uri(args[-1]).type == 'file':
		destination_base = args.pop()
	else:
		destination_base = "."

	if len(args) == 0:
		raise ParameterError("Nothing to download. Expecting S3 URI.")

	remote_list = fetch_remote_list(args, require_attribs = False)
	remote_list, exclude_list = _filelist_filter_exclude_include(remote_list)

	remote_count = len(remote_list)

	info(u"Summary: %d remote files to download" % remote_count)

	if remote_count > 0:
		if not os.path.isdir(destination_base) or destination_base == '-':
			## We were either given a file name (existing or not) or want STDOUT
			if remote_count > 1:
				raise ParameterError("Destination must be a directory when downloading multiple sources.")
			remote_list[remote_list.keys()[0]]['local_filename'] = deunicodise(destination_base)
		elif os.path.isdir(destination_base):
			if destination_base[-1] != os.path.sep:
				destination_base += os.path.sep
			for key in remote_list:
				remote_list[key]['local_filename'] = destination_base + key
		else:
			raise InternalError("WTF? Is it a dir or not? -- %s" % destination_base)

	if cfg.dry_run:
		for key in exclude_list:
			output(u"exclude: %s" % unicodise(key))
		for key in remote_list:
			output(u"download: %s -> %s" % (remote_list[key]['object_uri_str'], remote_list[key]['local_filename']))

		warning(u"Exitting now because of --dry-run")
		return

	seq = 0
	for key in remote_list:
		seq += 1
		item = remote_list[key]
		uri = S3Uri(item['object_uri_str'])
		## Encode / Decode destination with "replace" to make sure it's compatible with current encoding
		destination = unicodise_safe(item['local_filename'])
		seq_label = "[%d of %d]" % (seq, remote_count)

		start_position = 0

		if destination == "-":
			## stdout
			dst_stream = sys.__stdout__
		else:
			## File
			try:
				file_exists = os.path.exists(destination)
				try:
					dst_stream = open(destination, "ab")
				except IOError, e:
					if e.errno == errno.ENOENT:
						basename = destination[:destination.rindex(os.path.sep)]
						info(u"Creating directory: %s" % basename)
						os.makedirs(basename)
						dst_stream = open(destination, "ab")
					else:
						raise
				if file_exists:
					if Config().get_continue:
						start_position = dst_stream.tell()
					elif Config().force:
						start_position = 0L
						dst_stream.seek(0L)
						dst_stream.truncate()
					elif Config().skip_existing:
						info(u"Skipping over existing file: %s" % (destination))
						continue
					else:
						dst_stream.close()
						raise ParameterError(u"File %s already exists. Use either of --force / --continue / --skip-existing or give it a new name." % destination)
			except IOError, e:
				error(u"Skipping %s: %s" % (destination, e.strerror))
				continue
		response = s3.object_get(uri, dst_stream, start_position = start_position, extra_label = seq_label)
		if response["headers"].has_key("x-amz-meta-s3tools-gpgenc"):
			gpg_decrypt(destination, response["headers"]["x-amz-meta-s3tools-gpgenc"])
			response["size"] = os.stat(destination)[6]
		if not Config().progress_meter and destination != "-":
			speed_fmt = formatSize(response["speed"], human_readable = True, floating_point = True)
			output(u"File %s saved as '%s' (%d bytes in %0.1f seconds, %0.2f %sB/s)" %
				(uri, destination, response["size"], response["elapsed"], speed_fmt[0], speed_fmt[1]))

def cmd_object_del(args):
	for uri_str in args:
		uri = S3Uri(uri_str)
		if uri.type != "s3":
			raise ParameterError("Expecting S3 URI instead of '%s'" % uri_str)
		if not uri.has_object():
			if Config().recursive and not Config().force:
				raise ParameterError("Please use --force to delete ALL contents of %s" % uri_str)
			elif not Config().recursive:
				raise ParameterError("File name required, not only the bucket name. Alternatively use --recursive")
		subcmd_object_del_uri(uri_str)

def subcmd_object_del_uri(uri_str, recursive = None):
	s3 = S3(cfg)

	if recursive is None:
		recursive = cfg.recursive

	remote_list = fetch_remote_list(uri_str, require_attribs = False, recursive = recursive)
	remote_list, exclude_list = _filelist_filter_exclude_include(remote_list)

	remote_count = len(remote_list)

	info(u"Summary: %d remote files to delete" % remote_count)

	if cfg.dry_run:
		for key in exclude_list:
			output(u"exclude: %s" % unicodise(key))
		for key in remote_list:
			output(u"delete: %s" % remote_list[key]['object_uri_str'])

		warning(u"Exitting now because of --dry-run")
		return

	for key in remote_list:
		item = remote_list[key]
		response = s3.object_delete(S3Uri(item['object_uri_str']))
		output(u"File %s deleted" % item['object_uri_str'])

def subcmd_cp_mv(args, process_fce, action_str, message):
	if len(args) < 2:
		raise ParameterError("Expecting two or more S3 URIs for " + action_str)
	dst_base_uri = S3Uri(args.pop())
	if dst_base_uri.type != "s3":
		raise ParameterError("Destination must be S3 URI. To download a file use 'get' or 'sync'.")
	destination_base = dst_base_uri.uri()

	remote_list = fetch_remote_list(args, require_attribs = False)
	remote_list, exclude_list = _filelist_filter_exclude_include(remote_list)

	remote_count = len(remote_list)

	info(u"Summary: %d remote files to %s" % (remote_count, action_str))

	if cfg.recursive:
		if not destination_base.endswith("/"):
			destination_base += "/"
		for key in remote_list:
			remote_list[key]['dest_name'] = destination_base + key
	else:
		key = remote_list.keys()[0]
		if destination_base.endswith("/"):
			remote_list[key]['dest_name'] = destination_base + key
		else:
			remote_list[key]['dest_name'] = destination_base

	if cfg.dry_run:
		for key in exclude_list:
			output(u"exclude: %s" % unicodise(key))
		for key in remote_list:
			output(u"%s: %s -> %s" % (action_str, remote_list[key]['object_uri_str'], remote_list[key]['dest_name']))

		warning(u"Exitting now because of --dry-run")
		return

	seq = 0
	for key in remote_list:
		seq += 1
		seq_label = "[%d of %d]" % (seq, remote_count)

		item = remote_list[key]
		src_uri = S3Uri(item['object_uri_str'])
		dst_uri = S3Uri(item['dest_name'])

		extra_headers = copy(cfg.extra_headers)
		response = process_fce(src_uri, dst_uri, extra_headers) 
		output(message % { "src" : src_uri, "dst" : dst_uri })
		if Config().acl_public:
			info(u"Public URL is: %s" % dst_uri.public_url())

def cmd_cp(args):
	s3 = S3(Config())
	subcmd_cp_mv(args, s3.object_copy, "copy", "File %(src)s copied to %(dst)s")

def cmd_mv(args):
	s3 = S3(Config())
	subcmd_cp_mv(args, s3.object_move, "move", "File %(src)s moved to %(dst)s")

def cmd_info(args):
	s3 = S3(Config())

	while (len(args)):
		uri_arg = args.pop(0)
		uri = S3Uri(uri_arg)
		if uri.type != "s3" or not uri.has_bucket():
			raise ParameterError("Expecting S3 URI instead of '%s'" % uri_arg)

		try:
			if uri.has_object():
				info = s3.object_info(uri)
				output(u"%s (object):" % uri.uri())
				output(u"   File size: %s" % info['headers']['content-length'])
				output(u"   Last mod:  %s" % info['headers']['last-modified'])
				output(u"   MIME type: %s" % info['headers']['content-type'])
				output(u"   MD5 sum:   %s" % info['headers']['etag'].strip('"'))
			else:
				info = s3.bucket_info(uri)
				output(u"%s (bucket):" % uri.uri())
				output(u"   Location:  %s" % info['bucket-location'])
			acl = s3.get_acl(uri)
			acl_grant_list = acl.getGrantList()
			for grant in acl_grant_list:
				output(u"   ACL:       %s: %s" % (grant['grantee'], grant['permission']))
			if acl.isAnonRead():
				output(u"   URL:       %s" % uri.public_url())
		except S3Error, e:
			if S3.codes.has_key(e.info["Code"]):
				error(S3.codes[e.info["Code"]] % uri.bucket())
				return
			else:
				raise

def _get_filelist_local(local_uri):
	info(u"Compiling list of local files...")
	if local_uri.isdir():
		local_base = deunicodise(local_uri.basename())
		local_path = deunicodise(local_uri.path())
		filelist = fswalk(local_path, cfg.follow_symlinks)
		single_file = False
	else:
		local_base = ""
		local_path = deunicodise(local_uri.dirname())
		filelist = [( local_path, [], [deunicodise(local_uri.basename())] )]
		single_file = True
	loc_list = SortedDict(ignore_case = False)
	for root, dirs, files in filelist:
		rel_root = root.replace(local_path, local_base, 1)
		for f in files:
			full_name = os.path.join(root, f)
			if not os.path.isfile(full_name):
				continue
			if os.path.islink(full_name):
                                if not cfg.follow_symlinks:
                                        continue
			relative_file = unicodise(os.path.join(rel_root, f))
			if os.path.sep != "/":
				# Convert non-unix dir separators to '/'
				relative_file = "/".join(relative_file.split(os.path.sep))
			if cfg.urlencoding_mode == "normal":
				relative_file = replace_nonprintables(relative_file)
			if relative_file.startswith('./'):
				relative_file = relative_file[2:]
			sr = os.stat_result(os.lstat(full_name))
			loc_list[relative_file] = {
				'full_name_unicode' : unicodise(full_name),
				'full_name' : full_name,
				'size' : sr.st_size, 
				'mtime' : sr.st_mtime,
				## TODO: Possibly more to save here...
			}
	return loc_list, single_file

def _get_filelist_remote(remote_uri, recursive = True):
	## If remote_uri ends with '/' then all remote files will have 
	## the remote_uri prefix removed in the relative path.
	## If, on the other hand, the remote_uri ends with something else
	## (probably alphanumeric symbol) we'll use the last path part 
	## in the relative path.
	##
	## Complicated, eh? See an example:
	## _get_filelist_remote("s3://bckt/abc/def") may yield:
	## { 'def/file1.jpg' : {}, 'def/xyz/blah.txt' : {} }
	## _get_filelist_remote("s3://bckt/abc/def/") will yield:
	## { 'file1.jpg' : {}, 'xyz/blah.txt' : {} }
	## Furthermore a prefix-magic can restrict the return list:
	## _get_filelist_remote("s3://bckt/abc/def/x") yields:
	## { 'xyz/blah.txt' : {} }

	info(u"Retrieving list of remote files for %s ..." % remote_uri)

	s3 = S3(Config())
	response = s3.bucket_list(remote_uri.bucket(), prefix = remote_uri.object(), recursive = recursive)

	rem_base_original = rem_base = remote_uri.object()
	remote_uri_original = remote_uri
	if rem_base != '' and rem_base[-1] != '/':
		rem_base = rem_base[:rem_base.rfind('/')+1]
		remote_uri = S3Uri("s3://%s/%s" % (remote_uri.bucket(), rem_base))
	rem_base_len = len(rem_base)
	rem_list = SortedDict(ignore_case = False)
	break_now = False
	for object in response['list']:
		if object['Key'] == rem_base_original and object['Key'][-1] != os.path.sep:
			## We asked for one file and we got that file :-)
			key = os.path.basename(object['Key'])
			object_uri_str = remote_uri_original.uri()
			break_now = True
			rem_list = {}	## Remove whatever has already been put to rem_list
		else:
			key = object['Key'][rem_base_len:]		## Beware - this may be '' if object['Key']==rem_base !!
			object_uri_str = remote_uri.uri() + key
		rem_list[key] = { 
			'size' : int(object['Size']),
			'timestamp' : dateS3toUnix(object['LastModified']), ## Sadly it's upload time, not our lastmod time :-(
			'md5' : object['ETag'][1:-1],
			'object_key' : object['Key'],
			'object_uri_str' : object_uri_str,
			'base_uri' : remote_uri,
		}
		if break_now:
			break
	return rem_list

def _filelist_filter_exclude_include(src_list):
	info(u"Applying --exclude/--include")
	cfg = Config()
	exclude_list = SortedDict(ignore_case = False)
	for file in src_list.keys():
		debug(u"CHECK: %s" % file)
		excluded = False
		for r in cfg.exclude:
			if r.search(file):
				excluded = True
				debug(u"EXCL-MATCH: '%s'" % (cfg.debug_exclude[r]))
				break
		if excluded:
			## No need to check for --include if not excluded
			for r in cfg.include:
				if r.search(file):
					excluded = False
					debug(u"INCL-MATCH: '%s'" % (cfg.debug_include[r]))
					break
		if excluded:
			## Still excluded - ok, action it
			debug(u"EXCLUDE: %s" % file)
			exclude_list[file] = src_list[file]
			del(src_list[file])
			continue
		else:
			debug(u"PASS: %s" % (file))
	return src_list, exclude_list

def _compare_filelists(src_list, dst_list, src_remote, dst_remote):
	def __direction_str(is_remote):
		return is_remote and "remote" or "local"

	# We don't support local->local sync, use 'rsync' or something like that instead ;-)
	assert(not(src_remote == False and dst_remote == False))

	info(u"Verifying attributes...")
	cfg = Config()
	exists_list = SortedDict(ignore_case = False)

	debug("Comparing filelists (direction: %s -> %s)" % (__direction_str(src_remote), __direction_str(dst_remote)))
	debug("src_list.keys: %s" % src_list.keys())
	debug("dst_list.keys: %s" % dst_list.keys())

	for file in src_list.keys():
		debug(u"CHECK: %s" % file)
		if dst_list.has_key(file):
			## Was --skip-existing requested?
			if cfg.skip_existing:
				debug(u"IGNR: %s (used --skip-existing)" % (file))
				exists_list[file] = src_list[file]
				del(src_list[file])
				## Remove from destination-list, all that is left there will be deleted
				del(dst_list[file])
				continue

			attribs_match = True
			## Check size first
			if 'size' in cfg.sync_checks and dst_list[file]['size'] != src_list[file]['size']:
				debug(u"XFER: %s (size mismatch: src=%s dst=%s)" % (file, src_list[file]['size'], dst_list[file]['size']))
				attribs_match = False
			
			if attribs_match and 'md5' in cfg.sync_checks:
				## ... same size, check MD5
				try:
					if src_remote == False and dst_remote == True:
						src_md5 = Utils.hash_file_md5(src_list[file]['full_name'])
						dst_md5 = dst_list[file]['md5']
					elif src_remote == True and dst_remote == False:
						src_md5 = src_list[file]['md5']
						dst_md5 = Utils.hash_file_md5(dst_list[file]['full_name'])
					elif src_remote == True and dst_remote == True:
						src_md5 = src_list[file]['md5']
						dst_md5 = dst_list[file]['md5']
				except:
					# MD5 sum verification failed - ignore that file altogether
					debug(u"IGNR: %s (disappeared)" % (file))
					warning(u"%s: file disappeared, ignoring." % (file))
					del(src_list[file])
					del(dst_list[file])
					continue

				if src_md5 != dst_md5:
					## Checksums are different.
					attribs_match = False
					debug(u"XFER: %s (md5 mismatch: src=%s dst=%s)" % (file, src_md5, dst_md5))

			if attribs_match:
				## Remove from source-list, all that is left there will be transferred
				debug(u"IGNR: %s (transfer not needed)" % file)
				exists_list[file] = src_list[file]
				del(src_list[file])

			## Remove from destination-list, all that is left there will be deleted
			del(dst_list[file])

	return src_list, dst_list, exists_list

def cmd_sync_remote2remote(args):
	s3 = S3(Config())

	# Normalise s3://uri (e.g. assert trailing slash)
	destination_base = unicode(S3Uri(args[-1]))

	src_list = fetch_remote_list(args[:-1], recursive = True, require_attribs = True)
	dst_list = fetch_remote_list(destination_base, recursive = True, require_attribs = True)
	 
	src_count = len(src_list)
	dst_count = len(dst_list)

	info(u"Found %d source files, %d destination files" % (src_count, dst_count))

	src_list, exclude_list = _filelist_filter_exclude_include(src_list)

	src_list, dst_list, existing_list = _compare_filelists(src_list, dst_list, src_remote = True, dst_remote = True)

	src_count = len(src_list)
	dst_count = len(dst_list)

	print(u"Summary: %d source files to copy, %d files at destination to delete" % (src_count, dst_count))

	if src_count > 0:
		### Populate 'remote_uri' only if we've got something to sync from src to dst
		for key in src_list:
			src_list[key]['target_uri'] = destination_base + key

	if cfg.dry_run:
		for key in exclude_list:
			output(u"exclude: %s" % unicodise(key))
		if cfg.delete_removed:
			for key in dst_list:
				output(u"delete: %s" % dst_list[key]['object_uri_str'])
		for key in src_list:
			output(u"Sync: %s -> %s" % (src_list[key]['object_uri_str'], src_list[key]['target_uri']))
		warning(u"Exitting now because of --dry-run")
		return

	# Delete items in destination that are not in source
	if cfg.delete_removed:
		if cfg.dry_run:
			for key in dst_list:
				output(u"delete: %s" % dst_list[key]['object_uri_str'])
		else:
			for key in dst_list:
				uri = S3Uri(dst_list[key]['object_uri_str'])
				s3.object_delete(uri)
				output(u"deleted: '%s'" % uri)
	
	# Perform the synchronization of files
	timestamp_start = time.time()
	seq = 0
	file_list = src_list.keys()
	file_list.sort()
	for file in file_list:
		seq += 1
		item = src_list[file]
		src_uri = S3Uri(item['object_uri_str'])
		dst_uri = S3Uri(item['target_uri'])
		seq_label = "[%d of %d]" % (seq, src_count)
		extra_headers = copy(cfg.extra_headers)
		try:
			response = s3.object_copy(src_uri, dst_uri, extra_headers)
			output("File %(src)s copied to %(dst)s" % { "src" : src_uri, "dst" : dst_uri })
		except S3Error, e:
			error("File %(src)s could not be copied: %(e)s" % { "src" : src_uri, "e" : e })
	total_elapsed = time.time() - timestamp_start
	outstr = "Done. Copied %d files in %0.1f seconds, %0.2f files/s" % (seq, total_elapsed, seq/total_elapsed)
	if seq > 0:
		output(outstr)
	else:
		info(outstr)

def cmd_sync_remote2local(args):
	def _parse_attrs_header(attrs_header):
		attrs = {}
		for attr in attrs_header.split("/"):
			key, val = attr.split(":")
			attrs[key] = val
		return attrs
		
	s3 = S3(Config())

	destination_base = args[-1]
	local_list, single_file_local = fetch_local_list(destination_base, recursive = True)
	remote_list = fetch_remote_list(args[:-1], recursive = True, require_attribs = True)

	local_count = len(local_list)
	remote_count = len(remote_list)

	info(u"Found %d remote files, %d local files" % (remote_count, local_count))

	remote_list, exclude_list = _filelist_filter_exclude_include(remote_list)

	remote_list, local_list, existing_list = _compare_filelists(remote_list, local_list, src_remote = True, dst_remote = False)

	local_count = len(local_list)
	remote_count = len(remote_list)

	info(u"Summary: %d remote files to download, %d local files to delete" % (remote_count, local_count))

	if not os.path.isdir(destination_base):
		## We were either given a file name (existing or not) or want STDOUT
		if remote_count > 1:
			raise ParameterError("Destination must be a directory when downloading multiple sources.")
		remote_list[remote_list.keys()[0]]['local_filename'] = deunicodise(destination_base)
	else:
		if destination_base[-1] != os.path.sep:
			destination_base += os.path.sep
		for key in remote_list:
			local_filename = destination_base + key
			if os.path.sep != "/":
				local_filename = os.path.sep.join(local_filename.split("/"))
			remote_list[key]['local_filename'] = deunicodise(local_filename)

	if cfg.dry_run:
		for key in exclude_list:
			output(u"exclude: %s" % unicodise(key))
		if cfg.delete_removed:
			for key in local_list:
				output(u"delete: %s" % local_list[key]['full_name_unicode'])
		for key in remote_list:
			output(u"download: %s -> %s" % (remote_list[key]['object_uri_str'], remote_list[key]['local_filename']))

		warning(u"Exitting now because of --dry-run")
		return

	if cfg.delete_removed:
		for key in local_list:
			os.unlink(local_list[key]['full_name'])
			output(u"deleted: %s" % local_list[key]['full_name_unicode'])

	total_size = 0
	total_elapsed = 0.0
	timestamp_start = time.time()
	seq = 0
	dir_cache = {}
	file_list = remote_list.keys()
	file_list.sort()
	for file in file_list:
		seq += 1
		item = remote_list[file]
		uri = S3Uri(item['object_uri_str'])
		dst_file = item['local_filename']
		seq_label = "[%d of %d]" % (seq, remote_count)
		try:
			dst_dir = os.path.dirname(dst_file)
			if not dir_cache.has_key(dst_dir):
				dir_cache[dst_dir] = Utils.mkdir_with_parents(dst_dir)
			if dir_cache[dst_dir] == False:
				warning(u"%s: destination directory not writable: %s" % (file, dst_dir))
				continue
			try:
				open_flags = os.O_CREAT
				open_flags |= os.O_TRUNC
				# open_flags |= os.O_EXCL

				debug(u"dst_file=%s" % unicodise(dst_file))
				# This will have failed should the file exist
				os.close(os.open(dst_file, open_flags))
				# Yeah I know there is a race condition here. Sadly I don't know how to open() in exclusive mode.
				dst_stream = open(dst_file, "wb")
				response = s3.object_get(uri, dst_stream, extra_label = seq_label)
				dst_stream.close()
				if response['headers'].has_key('x-amz-meta-s3cmd-attrs') and cfg.preserve_attrs:
					attrs = _parse_attrs_header(response['headers']['x-amz-meta-s3cmd-attrs'])
					if attrs.has_key('mode'):
						os.chmod(dst_file, int(attrs['mode']))
					if attrs.has_key('mtime') or attrs.has_key('atime'):
						mtime = attrs.has_key('mtime') and int(attrs['mtime']) or int(time.time())
						atime = attrs.has_key('atime') and int(attrs['atime']) or int(time.time())
						os.utime(dst_file, (atime, mtime))
					## FIXME: uid/gid / uname/gname handling comes here! TODO
			except OSError, e:
				try: dst_stream.close()
				except: pass
				if e.errno == errno.EEXIST:
					warning(u"%s exists - not overwriting" % (dst_file))
					continue
				if e.errno in (errno.EPERM, errno.EACCES):
					warning(u"%s not writable: %s" % (dst_file, e.strerror))
					continue
				if e.errno == errno.EISDIR:
					warning(u"%s is a directory - skipping over" % dst_file)
					continue
				raise e
			except KeyboardInterrupt:
				try: dst_stream.close()
				except: pass
				warning(u"Exiting after keyboard interrupt")
				return
			except Exception, e:
				try: dst_stream.close()
				except: pass
				error(u"%s: %s" % (file, e))
				continue
			# We have to keep repeating this call because 
			# Python 2.4 doesn't support try/except/finally
			# construction :-(
			try: dst_stream.close()
			except: pass
		except S3DownloadError, e:
			error(u"%s: download failed too many times. Skipping that file." % file)
			continue
		speed_fmt = formatSize(response["speed"], human_readable = True, floating_point = True)
		if not Config().progress_meter:
			output(u"File '%s' stored as '%s' (%d bytes in %0.1f seconds, %0.2f %sB/s) %s" %
				(uri, unicodise(dst_file), response["size"], response["elapsed"], speed_fmt[0], speed_fmt[1],
				seq_label))
		total_size += response["size"]

	total_elapsed = time.time() - timestamp_start
	speed_fmt = formatSize(total_size/total_elapsed, human_readable = True, floating_point = True)

	# Only print out the result if any work has been done or 
	# if the user asked for verbose output
	outstr = "Done. Downloaded %d bytes in %0.1f seconds, %0.2f %sB/s" % (total_size, total_elapsed, speed_fmt[0], speed_fmt[1])
	if total_size > 0:
		output(outstr)
	else:
		info(outstr)

def cmd_sync_local2remote(args):
	def _build_attr_header(src):
		import pwd, grp
		attrs = {}
		src = deunicodise(src)
		try:
			st = os.stat_result(os.stat(src))
		except OSError, e:
			raise InvalidFileError(u"%s: %s" % (unicodise(src), e.strerror))
		for attr in cfg.preserve_attrs_list:
			if attr == 'uname':
				try:
					val = pwd.getpwuid(st.st_uid).pw_name
				except KeyError:
					attr = "uid"
					val = st.st_uid
					warning(u"%s: Owner username not known. Storing UID=%d instead." % (unicodise(src), val))
			elif attr == 'gname':
				try:
					val = grp.getgrgid(st.st_gid).gr_name
				except KeyError:
					attr = "gid"
					val = st.st_gid
					warning(u"%s: Owner groupname not known. Storing GID=%d instead." % (unicodise(src), val))
			else:
				val = getattr(st, 'st_' + attr)
			attrs[attr] = val
		result = ""
		for k in attrs: result += "%s:%s/" % (k, attrs[k])
		return { 'x-amz-meta-s3cmd-attrs' : result[:-1] }

	s3 = S3(cfg)

	if cfg.encrypt:
		error(u"S3cmd 'sync' doesn't yet support GPG encryption, sorry.")
		error(u"Either use unconditional 's3cmd put --recursive'")
		error(u"or disable encryption with --no-encrypt parameter.")
		sys.exit(1)

	## Normalize URI to convert s3://bkt to s3://bkt/ (trailing slash)
	destination_base_uri = S3Uri(args[-1])
	if destination_base_uri.type != 's3':
		raise ParameterError("Destination must be S3Uri. Got: %s" % destination_base_uri)
	destination_base = str(destination_base_uri)

	local_list, single_file_local = fetch_local_list(args[:-1], recursive = True)
	remote_list = fetch_remote_list(destination_base, recursive = True, require_attribs = True)

	local_count = len(local_list)
	remote_count = len(remote_list)

	info(u"Found %d local files, %d remote files" % (local_count, remote_count))

	local_list, exclude_list = _filelist_filter_exclude_include(local_list)

	if single_file_local and len(local_list) == 1 and len(remote_list) == 1:
		## Make remote_key same as local_key for comparison if we're dealing with only one file
		remote_list_entry = remote_list[remote_list.keys()[0]]
		# Flush remote_list, by the way
		remote_list = { local_list.keys()[0] : remote_list_entry }

	local_list, remote_list, existing_list = _compare_filelists(local_list, remote_list, src_remote = False, dst_remote = True)

	local_count = len(local_list)
	remote_count = len(remote_list)

	info(u"Summary: %d local files to upload, %d remote files to delete" % (local_count, remote_count))

	if local_count > 0:
		## Populate 'remote_uri' only if we've got something to upload
		if not destination_base.endswith("/"):
			if not single_file_local:
				raise ParameterError("Destination S3 URI must end with '/' (ie must refer to a directory on the remote side).")
			local_list[local_list.keys()[0]]['remote_uri'] = unicodise(destination_base)
		else:
			for key in local_list:
				local_list[key]['remote_uri'] = unicodise(destination_base + key)

	if cfg.dry_run:
		for key in exclude_list:
			output(u"exclude: %s" % unicodise(key))
		if cfg.delete_removed:
			for key in remote_list:
				output(u"delete: %s" % remote_list[key]['object_uri_str'])
		for key in local_list:
			output(u"upload: %s -> %s" % (local_list[key]['full_name_unicode'], local_list[key]['remote_uri']))

		warning(u"Exitting now because of --dry-run")
		return

	if cfg.delete_removed:
		for key in remote_list:
			uri = S3Uri(remote_list[key]['object_uri_str'])
			s3.object_delete(uri)
			output(u"deleted: '%s'" % uri)

	total_size = 0
	total_elapsed = 0.0
	timestamp_start = time.time()
	seq = 0
	file_list = local_list.keys()
	file_list.sort()
	for file in file_list:
		seq += 1
		item = local_list[file]
		src = item['full_name']
		uri = S3Uri(item['remote_uri'])
		seq_label = "[%d of %d]" % (seq, local_count)
		extra_headers = copy(cfg.extra_headers)
		try:
			if cfg.preserve_attrs:
				attr_header = _build_attr_header(src)
				debug(u"attr_header: %s" % attr_header)
				extra_headers.update(attr_header)
			response = s3.object_put(src, uri, extra_headers, extra_label = seq_label)
		except InvalidFileError, e:
			warning(u"File can not be uploaded: %s" % e)
			continue
		except S3UploadError, e:
			error(u"%s: upload failed too many times. Skipping that file." % item['full_name_unicode'])
			continue
		speed_fmt = formatSize(response["speed"], human_readable = True, floating_point = True)
		if not cfg.progress_meter:
			output(u"File '%s' stored as '%s' (%d bytes in %0.1f seconds, %0.2f %sB/s) %s" %
				(item['full_name_unicode'], uri, response["size"], response["elapsed"], 
				speed_fmt[0], speed_fmt[1], seq_label))
		total_size += response["size"]

	total_elapsed = time.time() - timestamp_start
	total_speed = total_elapsed and total_size/total_elapsed or 0.0
	speed_fmt = formatSize(total_speed, human_readable = True, floating_point = True)

	# Only print out the result if any work has been done or 
	# if the user asked for verbose output
	outstr = "Done. Uploaded %d bytes in %0.1f seconds, %0.2f %sB/s" % (total_size, total_elapsed, speed_fmt[0], speed_fmt[1])
	if total_size > 0:
		output(outstr)
	else:
		info(outstr)

def cmd_sync(args):
	if (len(args) < 2):
		raise ParameterError("Too few parameters! Expected: %s" % commands['sync']['param'])

	if S3Uri(args[0]).type == "file" and S3Uri(args[-1]).type == "s3":
		return cmd_sync_local2remote(args)
	if S3Uri(args[0]).type == "s3" and S3Uri(args[-1]).type == "file":
		return cmd_sync_remote2local(args)
	if S3Uri(args[0]).type == "s3" and S3Uri(args[-1]).type == "s3":
		return cmd_sync_remote2remote(args)
	raise ParameterError("Invalid source/destination: '%s'" % "' '".join(args))

def cmd_setacl(args):
	def _update_acl(uri, seq_label = ""):
		something_changed = False
		acl = s3.get_acl(uri)
		debug(u"acl: %s - %r" % (uri, acl.grantees))
		if cfg.acl_public == True:
			if acl.isAnonRead():
				info(u"%s: already Public, skipping %s" % (uri, seq_label))
			else:
				acl.grantAnonRead()
				something_changed = True
		elif cfg.acl_public == False: # we explicitely check for False, because it could be None
			if not acl.isAnonRead():
				info(u"%s: already Private, skipping %s" % (uri, seq_label))
			else:
				acl.revokeAnonRead()
				something_changed = True

		# update acl with arguments
		# grant first and revoke later, because revoke has priority
		if cfg.acl_grants:
			something_changed = True
			for grant in cfg.acl_grants:
				acl.grant(**grant);

		if cfg.acl_revokes:
			something_changed = True
			for revoke in cfg.acl_revokes:
				acl.revoke(**revoke);

		if not something_changed:
			return

		retsponse = s3.set_acl(uri, acl)
		if retsponse['status'] == 200:
			if cfg.acl_public in (True, False):
				output(u"%s: ACL set to %s  %s" % (uri, set_to_acl, seq_label))
			else:
				output(u"%s: ACL updated" % uri)

	s3 = S3(cfg)

	set_to_acl = cfg.acl_public and "Public" or "Private"

	if not cfg.recursive:
		old_args = args
		args = []
		for arg in old_args:
			uri = S3Uri(arg)
			if not uri.has_object():
				if cfg.acl_public != None:
					info("Setting bucket-level ACL for %s to %s" % (uri.uri(), set_to_acl))
				else:
					info("Setting bucket-level ACL for %s" % (uri.uri()))
				if not cfg.dry_run:
					_update_acl(uri)
			else:
				args.append(arg)

	remote_list = fetch_remote_list(args)
	remote_list, exclude_list = _filelist_filter_exclude_include(remote_list)

	remote_count = len(remote_list)

	info(u"Summary: %d remote files to update" % remote_count)

	if cfg.dry_run:
		for key in exclude_list:
			output(u"exclude: %s" % unicodise(key))
		for key in remote_list:
			output(u"setacl: %s" % remote_list[key]['object_uri_str'])

		warning(u"Exitting now because of --dry-run")
		return

	seq = 0
	for key in remote_list:
		seq += 1
		seq_label = "[%d of %d]" % (seq, remote_count)
		uri = S3Uri(remote_list[key]['object_uri_str'])
		_update_acl(uri, seq_label)

def cmd_accesslog(args):
	s3 = S3(cfg)
	bucket_uri = S3Uri(args.pop())
	if bucket_uri.object():
		raise ParameterError("Only bucket name is required for [accesslog] command")
	if cfg.log_target_prefix == False:
		accesslog, response = s3.set_accesslog(bucket_uri, enable = False)
	elif cfg.log_target_prefix:
		log_target_prefix_uri = S3Uri(cfg.log_target_prefix)
		if log_target_prefix_uri.type != "s3":
			raise ParameterError("--log-target-prefix must be a S3 URI")
		accesslog, response = s3.set_accesslog(bucket_uri, enable = True, log_target_prefix_uri = log_target_prefix_uri, acl_public = cfg.acl_public)
	else:	# cfg.log_target_prefix == None
		accesslog = s3.get_accesslog(bucket_uri)

	output(u"Access logging for: %s" % bucket_uri.uri())
	output(u"   Logging Enabled: %s" % accesslog.isLoggingEnabled())
	if accesslog.isLoggingEnabled():
		output(u"     Target prefix: %s" % accesslog.targetPrefix().uri())
		#output(u"   Public Access:   %s" % accesslog.isAclPublic())
		
def cmd_sign(args):
	string_to_sign = args.pop()
	debug("string-to-sign: %r" % string_to_sign)
	signature = Utils.sign_string(string_to_sign)
	output("Signature: %s" % signature)

def cmd_fixbucket(args):
	def _unescape(text):
		##
		# Removes HTML or XML character references and entities from a text string.
		#
		# @param text The HTML (or XML) source text.
		# @return The plain text, as a Unicode string, if necessary.
		# 
		# From: http://effbot.org/zone/re-sub.htm#unescape-html
		def _unescape_fixup(m):
			text = m.group(0)
			if not htmlentitydefs.name2codepoint.has_key('apos'):
				htmlentitydefs.name2codepoint['apos'] = ord("'")
			if text[:2] == "&#":
				# character reference
				try:
					if text[:3] == "&#x":
						return unichr(int(text[3:-1], 16))
					else:
						return unichr(int(text[2:-1]))
				except ValueError:
					pass
			else:
				# named entity
				try:
					text = unichr(htmlentitydefs.name2codepoint[text[1:-1]])
				except KeyError:
					pass
			return text # leave as is
			text = text.encode('ascii', 'xmlcharrefreplace')
		return re.sub("&#?\w+;", _unescape_fixup, text)

	cfg.urlencoding_mode = "fixbucket"
	s3 = S3(cfg)

	count = 0
	for arg in args:
		culprit = S3Uri(arg)
		if culprit.type != "s3":
			raise ParameterError("Expecting S3Uri instead of: %s" % arg)
		response = s3.bucket_list_noparse(culprit.bucket(), culprit.object(), recursive = True)
		r_xent = re.compile("&#x[\da-fA-F]+;")
		response['data'] = unicode(response['data'], 'UTF-8')
		keys = re.findall("<Key>(.*?)</Key>", response['data'], re.MULTILINE)
		debug("Keys: %r" % keys)
		for key in keys:
			if r_xent.search(key):
				info("Fixing: %s" % key)
				debug("Step 1: Transforming %s" % key)
				key_bin = _unescape(key)
				debug("Step 2:       ... to %s" % key_bin)
				key_new = replace_nonprintables(key_bin)
				debug("Step 3:  ... then to %s" % key_new)
				src = S3Uri("s3://%s/%s" % (culprit.bucket(), key_bin))
				dst = S3Uri("s3://%s/%s" % (culprit.bucket(), key_new))
				resp_move = s3.object_move(src, dst)
				if resp_move['status'] == 200:
					output("File %r renamed to %s" % (key_bin, key_new))
					count += 1
				else:
					error("Something went wrong for: %r" % key)
					error("Please report the problem to s3tools-bugs@lists.sourceforge.net")
	if count > 0:
		warning("Fixed %d files' names. Their ACL were reset to Private." % count)
		warning("Use 's3cmd setacl --acl-public s3://...' to make")
		warning("them publicly readable if required.")

def resolve_list(lst, args):
	retval = []
	for item in lst:
		retval.append(item % args)
	return retval

def gpg_command(command, passphrase = ""):
	debug("GPG command: " + " ".join(command))
	p = subprocess.Popen(command, stdin = subprocess.PIPE, stdout = subprocess.PIPE, stderr = subprocess.STDOUT)
	p_stdout, p_stderr = p.communicate(passphrase + "\n")
	debug("GPG output:")
	for line in p_stdout.split("\n"):
		debug("GPG: " + line)
	p_exitcode = p.wait()
	return p_exitcode

def gpg_encrypt(filename):
	tmp_filename = Utils.mktmpfile()
	args = {
		"gpg_command" : cfg.gpg_command,
		"passphrase_fd" : "0",
		"input_file" : filename, 
		"output_file" : tmp_filename,
	}
	info(u"Encrypting file %(input_file)s to %(output_file)s..." % args)
	command = resolve_list(cfg.gpg_encrypt.split(" "), args)
	code = gpg_command(command, cfg.gpg_passphrase)
	return (code, tmp_filename, "gpg")

def gpg_decrypt(filename, gpgenc_header = "", in_place = True):
	tmp_filename = Utils.mktmpfile(filename)
	args = {
		"gpg_command" : cfg.gpg_command,
		"passphrase_fd" : "0",
		"input_file" : filename, 
		"output_file" : tmp_filename,
	}
	info(u"Decrypting file %(input_file)s to %(output_file)s..." % args)
	command = resolve_list(cfg.gpg_decrypt.split(" "), args)
	code = gpg_command(command, cfg.gpg_passphrase)
	if code == 0 and in_place:
		debug(u"Renaming %s to %s" % (tmp_filename, filename))
		os.unlink(filename)
		os.rename(tmp_filename, filename)
		tmp_filename = filename
	return (code, tmp_filename)

def run_configure(config_file):
	cfg = Config()
	options = [
		("access_key", "Access Key", "Access key and Secret key are your identifiers for Amazon S3"),
		("secret_key", "Secret Key"),
		("gpg_passphrase", "Encryption password", "Encryption password is used to protect your files from reading\nby unauthorized persons while in transfer to S3"),
		("gpg_command", "Path to GPG program"),
		("use_https", "Use HTTPS protocol", "When using secure HTTPS protocol all communication with Amazon S3\nservers is protected from 3rd party eavesdropping. This method is\nslower than plain HTTP and can't be used if you're behind a proxy"),
		("proxy_host", "HTTP Proxy server name", "On some networks all internet access must go through a HTTP proxy.\nTry setting it here if you can't conect to S3 directly"),
		("proxy_port", "HTTP Proxy server port"),
		]
	## Option-specfic defaults
	if getattr(cfg, "gpg_command") == "":
		setattr(cfg, "gpg_command", find_executable("gpg"))

	if getattr(cfg, "proxy_host") == "" and os.getenv("http_proxy"):
		re_match=re.match("(http://)?([^:]+):(\d+)", os.getenv("http_proxy"))
		if re_match:
			setattr(cfg, "proxy_host", re_match.groups()[1])
			setattr(cfg, "proxy_port", re_match.groups()[2])

	try:
		while 1:
			output(u"\nEnter new values or accept defaults in brackets with Enter.")
			output(u"Refer to user manual for detailed description of all options.")
			for option in options:
				prompt = option[1]
				## Option-specific handling
				if option[0] == 'proxy_host' and getattr(cfg, 'use_https') == True:
					setattr(cfg, option[0], "")
					continue
				if option[0] == 'proxy_port' and getattr(cfg, 'proxy_host') == "":
					setattr(cfg, option[0], 0)
					continue

				try:
					val = getattr(cfg, option[0])
					if type(val) is bool:
						val = val and "Yes" or "No"
					if val not in (None, ""):
						prompt += " [%s]" % val
				except AttributeError:
					pass

				if len(option) >= 3:
					output(u"\n%s" % option[2])

				val = raw_input(prompt + ": ")
				if val != "":
					if type(getattr(cfg, option[0])) is bool:
						# Turn 'Yes' into True, everything else into False
						val = val.lower().startswith('y')
					setattr(cfg, option[0], val)
			output(u"\nNew settings:")
			for option in options:
				output(u"  %s: %s" % (option[1], getattr(cfg, option[0])))
			val = raw_input("\nTest access with supplied credentials? [Y/n] ")
			if val.lower().startswith("y") or val == "":
				try:
					output(u"Please wait...")
					S3(Config()).bucket_list("", "")
					output(u"Success. Your access key and secret key worked fine :-)")

					output(u"\nNow verifying that encryption works...")
					if not getattr(cfg, "gpg_command") or not getattr(cfg, "gpg_passphrase"):
						output(u"Not configured. Never mind.")
					else:
						if not getattr(cfg, "gpg_command"):
							raise Exception("Path to GPG program not set")
						if not os.path.isfile(getattr(cfg, "gpg_command")):
							raise Exception("GPG program not found")
						filename = Utils.mktmpfile()
						f = open(filename, "w")
						f.write(os.sys.copyright)
						f.close()
						ret_enc = gpg_encrypt(filename)
						ret_dec = gpg_decrypt(ret_enc[1], ret_enc[2], False)
						hash = [
							Utils.hash_file_md5(filename),
							Utils.hash_file_md5(ret_enc[1]),
							Utils.hash_file_md5(ret_dec[1]),
						]
						os.unlink(filename)
						os.unlink(ret_enc[1])
						os.unlink(ret_dec[1])
						if hash[0] == hash[2] and hash[0] != hash[1]:
							output ("Success. Encryption and decryption worked fine :-)") 
						else:
							raise Exception("Encryption verification error.")

				except Exception, e:
					error(u"Test failed: %s" % (e))
					val = raw_input("\nRetry configuration? [Y/n] ")
					if val.lower().startswith("y") or val == "":
						continue
					

			val = raw_input("\nSave settings? [y/N] ")
			if val.lower().startswith("y"):
				break
			val = raw_input("Retry configuration? [Y/n] ")
			if val.lower().startswith("n"):
				raise EOFError()

		## Overwrite existing config file, make it user-readable only
		old_mask = os.umask(0077)
		try:
			os.remove(config_file)
		except OSError, e:
			if e.errno != errno.ENOENT:
				raise
		f = open(config_file, "w")
		os.umask(old_mask)
		cfg.dump_config(f)
		f.close()
		output(u"Configuration saved to '%s'" % config_file)

	except (EOFError, KeyboardInterrupt):
		output(u"\nConfiguration aborted. Changes were NOT saved.")
		return
	
	except IOError, e:
		error(u"Writing config file failed: %s: %s" % (config_file, e.strerror))
		sys.exit(1)

def process_patterns_from_file(fname, patterns_list):
	try:
		fn = open(fname, "rt")
	except IOError, e:
		error(e)
		sys.exit(1)
	for pattern in fn:
		pattern = pattern.strip()
		if re.match("^#", pattern) or re.match("^\s*$", pattern):
			continue
		debug(u"%s: adding rule: %s" % (fname, pattern))
		patterns_list.append(pattern)

	return patterns_list

def process_patterns(patterns_list, patterns_from, is_glob, option_txt = ""):
	"""
	process_patterns(patterns, patterns_from, is_glob, option_txt = "")
	Process --exclude / --include GLOB and REGEXP patterns.
	'option_txt' is 'exclude' / 'include' / 'rexclude' / 'rinclude'
	Returns: patterns_compiled, patterns_text
	"""

	patterns_compiled = []
	patterns_textual = {}

	if patterns_list is None:
		patterns_list = []

	if patterns_from:
		## Append patterns from glob_from 
		for fname in patterns_from:
			debug(u"processing --%s-from %s" % (option_txt, fname))
			patterns_list = process_patterns_from_file(fname, patterns_list)

	for pattern in patterns_list:
		debug(u"processing %s rule: %s" % (option_txt, patterns_list))
		if is_glob:
			pattern = glob.fnmatch.translate(pattern)
		r = re.compile(pattern)
		patterns_compiled.append(r)
		patterns_textual[r] = pattern

	return patterns_compiled, patterns_textual

def get_commands_list():
	return [
	{"cmd":"mb", "label":"Make bucket", "param":"s3://BUCKET", "func":cmd_bucket_create, "argc":1},
	{"cmd":"rb", "label":"Remove bucket", "param":"s3://BUCKET", "func":cmd_bucket_delete, "argc":1},
	{"cmd":"ls", "label":"List objects or buckets", "param":"[s3://BUCKET[/PREFIX]]", "func":cmd_ls, "argc":0},
	{"cmd":"la", "label":"List all object in all buckets", "param":"", "func":cmd_buckets_list_all_all, "argc":0},
	{"cmd":"put", "label":"Put file into bucket", "param":"FILE [FILE...] s3://BUCKET[/PREFIX]", "func":cmd_object_put, "argc":2},
	{"cmd":"get", "label":"Get file from bucket", "param":"s3://BUCKET/OBJECT LOCAL_FILE", "func":cmd_object_get, "argc":1},
	{"cmd":"del", "label":"Delete file from bucket", "param":"s3://BUCKET/OBJECT", "func":cmd_object_del, "argc":1},
	#{"cmd":"mkdir", "label":"Make a virtual S3 directory", "param":"s3://BUCKET/path/to/dir", "func":cmd_mkdir, "argc":1},
	{"cmd":"sync", "label":"Synchronize a directory tree to S3", "param":"LOCAL_DIR s3://BUCKET[/PREFIX] or s3://BUCKET[/PREFIX] LOCAL_DIR", "func":cmd_sync, "argc":2},
	{"cmd":"du", "label":"Disk usage by buckets", "param":"[s3://BUCKET[/PREFIX]]", "func":cmd_du, "argc":0},
	{"cmd":"info", "label":"Get various information about Buckets or Files", "param":"s3://BUCKET[/OBJECT]", "func":cmd_info, "argc":1},
	{"cmd":"cp", "label":"Copy object", "param":"s3://BUCKET1/OBJECT1 s3://BUCKET2[/OBJECT2]", "func":cmd_cp, "argc":2},
	{"cmd":"mv", "label":"Move object", "param":"s3://BUCKET1/OBJECT1 s3://BUCKET2[/OBJECT2]", "func":cmd_mv, "argc":2},
	{"cmd":"setacl", "label":"Modify Access control list for Bucket or Files", "param":"s3://BUCKET[/OBJECT]", "func":cmd_setacl, "argc":1},
	{"cmd":"accesslog", "label":"Enable/disable bucket access logging", "param":"s3://BUCKET", "func":cmd_accesslog, "argc":1},
	{"cmd":"sign", "label":"Sign arbitrary string using the secret key", "param":"STRING-TO-SIGN", "func":cmd_sign, "argc":1},
	{"cmd":"fixbucket", "label":"Fix invalid file names in a bucket", "param":"s3://BUCKET[/PREFIX]", "func":cmd_fixbucket, "argc":1},

	## CloudFront commands
	{"cmd":"cflist", "label":"List CloudFront distribution points", "param":"", "func":CfCmd.info, "argc":0},
	{"cmd":"cfinfo", "label":"Display CloudFront distribution point parameters", "param":"[cf://DIST_ID]", "func":CfCmd.info, "argc":0},
	{"cmd":"cfcreate", "label":"Create CloudFront distribution point", "param":"s3://BUCKET", "func":CfCmd.create, "argc":1},
	{"cmd":"cfdelete", "label":"Delete CloudFront distribution point", "param":"cf://DIST_ID", "func":CfCmd.delete, "argc":1},
	{"cmd":"cfmodify", "label":"Change CloudFront distribution point parameters", "param":"cf://DIST_ID", "func":CfCmd.modify, "argc":1},
	]

def format_commands(progname, commands_list):
	help = "Commands:\n"
	for cmd in commands_list:
		help += "  %s\n      %s %s %s\n" % (cmd["label"], progname, cmd["cmd"], cmd["param"])
	return help

class OptionMimeType(Option):
	def check_mimetype(option, opt, value):
		if re.compile("^[a-z0-9]+/[a-z0-9+\.-]+$", re.IGNORECASE).match(value):
			return value
		raise OptionValueError("option %s: invalid MIME-Type format: %r" % (opt, value))

class OptionS3ACL(Option):
	def check_s3acl(option, opt, value):
		permissions = ('read', 'write', 'read_acp', 'write_acp', 'full_control', 'all')
		try:
			permission, grantee = re.compile("^(\w+):(.+)$", re.IGNORECASE).match(value).groups()
			if not permission or not grantee:
				raise
			if permission in permissions:
				return { 'name' : grantee, 'permission' : permission.upper() }
			else:
				raise OptionValueError("option %s: invalid S3 ACL permission: %s (valid values: %s)" % 
					(opt, permission, ", ".join(permissions)))
		except:
			raise OptionValueError("option %s: invalid S3 ACL format: %r" % (opt, value))

class OptionAll(OptionMimeType, OptionS3ACL):
	TYPE_CHECKER = copy(Option.TYPE_CHECKER)
	TYPE_CHECKER["mimetype"] = OptionMimeType.check_mimetype
	TYPE_CHECKER["s3acl"] = OptionS3ACL.check_s3acl
	TYPES = Option.TYPES + ("mimetype", "s3acl")

class MyHelpFormatter(IndentedHelpFormatter):
	def format_epilog(self, epilog):
		if epilog:
			return "\n" + epilog + "\n"
		else:
			return ""

def main():
	global cfg

	commands_list = get_commands_list()
	commands = {}

	## Populate "commands" from "commands_list"
	for cmd in commands_list:
		if cmd.has_key("cmd"):
			commands[cmd["cmd"]] = cmd

	default_verbosity = Config().verbosity
	optparser = OptionParser(option_class=OptionAll, formatter=MyHelpFormatter())
	#optparser.disable_interspersed_args()

	config_file = None
	if os.getenv("HOME"):
		config_file = os.path.join(os.getenv("HOME"), ".s3cfg")
	elif os.name == "nt" and os.getenv("USERPROFILE"):
		config_file = os.path.join(os.getenv("USERPROFILE").decode('mbcs'), "Application Data", "s3cmd.ini")

	preferred_encoding = locale.getpreferredencoding() or "UTF-8"

	optparser.set_defaults(encoding = preferred_encoding)
	optparser.set_defaults(config = config_file)
	optparser.set_defaults(verbosity = default_verbosity)

	optparser.add_option(      "--configure", dest="run_configure", action="store_true", help="Invoke interactive (re)configuration tool.")
	optparser.add_option("-c", "--config", dest="config", metavar="FILE", help="Config file name. Defaults to %default")
	optparser.add_option(      "--dump-config", dest="dump_config", action="store_true", help="Dump current configuration after parsing config files and command line options and exit.")

	optparser.add_option("-n", "--dry-run", dest="dry_run", action="store_true", help="Only show what should be uploaded or downloaded but don't actually do it. May still perform S3 requests to get bucket listings and other information though (only for file transfer commands)")

	optparser.add_option("-e", "--encrypt", dest="encrypt", action="store_true", help="Encrypt files before uploading to S3.")
	optparser.add_option(      "--no-encrypt", dest="encrypt", action="store_false", help="Don't encrypt files.")
	optparser.add_option("-f", "--force", dest="force", action="store_true", help="Force overwrite and other dangerous operations.")
	optparser.add_option(      "--continue", dest="get_continue", action="store_true", help="Continue getting a partially downloaded file (only for [get] command).")
	optparser.add_option(      "--skip-existing", dest="skip_existing", action="store_true", help="Skip over files that exist at the destination (only for [get] and [sync] commands).")
	optparser.add_option("-r", "--recursive", dest="recursive", action="store_true", help="Recursive upload, download or removal.")
	optparser.add_option("-P", "--acl-public", dest="acl_public", action="store_true", help="Store objects with ACL allowing read for anyone.")
	optparser.add_option(      "--acl-private", dest="acl_public", action="store_false", help="Store objects with default ACL allowing access for you only.")
	optparser.add_option(      "--acl-grant", dest="acl_grants", type="s3acl", action="append", metavar="PERMISSION:EMAIL or USER_CANONICAL_ID", help="Grant stated permission to a given amazon user. Permission is one of: read, write, read_acp, write_acp, full_control, all")
	optparser.add_option(      "--acl-revoke", dest="acl_revokes", type="s3acl", action="append", metavar="PERMISSION:USER_CANONICAL_ID", help="Revoke stated permission for a given amazon user. Permission is one of: read, write, read_acp, wr     ite_acp, full_control, all")

	optparser.add_option(      "--delete-removed", dest="delete_removed", action="store_true", help="Delete remote objects with no corresponding local file [sync]")
	optparser.add_option(      "--no-delete-removed", dest="delete_removed", action="store_false", help="Don't delete remote objects.")
	optparser.add_option("-p", "--preserve", dest="preserve_attrs", action="store_true", help="Preserve filesystem attributes (mode, ownership, timestamps). Default for [sync] command.")
	optparser.add_option(      "--no-preserve", dest="preserve_attrs", action="store_false", help="Don't store FS attributes")
	optparser.add_option(      "--exclude", dest="exclude", action="append", metavar="GLOB", help="Filenames and paths matching GLOB will be excluded from sync")
	optparser.add_option(      "--exclude-from", dest="exclude_from", action="append", metavar="FILE", help="Read --exclude GLOBs from FILE")
	optparser.add_option(      "--rexclude", dest="rexclude", action="append", metavar="REGEXP", help="Filenames and paths matching REGEXP (regular expression) will be excluded from sync")
	optparser.add_option(      "--rexclude-from", dest="rexclude_from", action="append", metavar="FILE", help="Read --rexclude REGEXPs from FILE")
	optparser.add_option(      "--include", dest="include", action="append", metavar="GLOB", help="Filenames and paths matching GLOB will be included even if previously excluded by one of --(r)exclude(-from) patterns")
	optparser.add_option(      "--include-from", dest="include_from", action="append", metavar="FILE", help="Read --include GLOBs from FILE")
	optparser.add_option(      "--rinclude", dest="rinclude", action="append", metavar="REGEXP", help="Same as --include but uses REGEXP (regular expression) instead of GLOB")
	optparser.add_option(      "--rinclude-from", dest="rinclude_from", action="append", metavar="FILE", help="Read --rinclude REGEXPs from FILE")

	optparser.add_option(      "--bucket-location", dest="bucket_location", help="Datacentre to create bucket in. As of now the datacenters are: US (default), EU, us-west-1, and ap-southeast-1")
	optparser.add_option(      "--reduced-redundancy", "--rr", dest="reduced_redundancy", action="store_true", help="Store object with 'Reduced redundancy'. Lower per-GB price. [put, cp, mv]")

	optparser.add_option(      "--access-logging-target-prefix", dest="log_target_prefix", help="Target prefix for access logs (S3 URI) (for [cfmodify] and [accesslog] commands)")
	optparser.add_option(      "--no-access-logging", dest="log_target_prefix", action="store_false", help="Disable access logging (for [cfmodify] and [accesslog] commands)")

	optparser.add_option("-m", "--mime-type", dest="default_mime_type", type="mimetype", metavar="MIME/TYPE", help="Default MIME-type to be set for objects stored.")
	optparser.add_option("-M", "--guess-mime-type", dest="guess_mime_type", action="store_true", help="Guess MIME-type of files by their extension. Falls back to default MIME-Type as specified by --mime-type option")

	optparser.add_option(      "--add-header", dest="add_header", action="append", metavar="NAME:VALUE", help="Add a given HTTP header to the upload request. Can be used multiple times. For instance set 'Expires' or 'Cache-Control' headers (or both) using this options if you like.")

	optparser.add_option(      "--encoding", dest="encoding", metavar="ENCODING", help="Override autodetected terminal and filesystem encoding (character set). Autodetected: %s" % preferred_encoding)
	optparser.add_option(      "--verbatim", dest="urlencoding_mode", action="store_const", const="verbatim", help="Use the S3 name as given on the command line. No pre-processing, encoding, etc. Use with caution!")

	optparser.add_option(      "--list-md5", dest="list_md5", action="store_true", help="Include MD5 sums in bucket listings (only for 'ls' command).")
	optparser.add_option("-H", "--human-readable-sizes", dest="human_readable_sizes", action="store_true", help="Print sizes in human readable form (eg 1kB instead of 1234).")

	optparser.add_option(      "--progress", dest="progress_meter", action="store_true", help="Display progress meter (default on TTY).")
	optparser.add_option(      "--no-progress", dest="progress_meter", action="store_false", help="Don't display progress meter (default on non-TTY).")
	optparser.add_option(      "--enable", dest="enable", action="store_true", help="Enable given CloudFront distribution (only for [cfmodify] command)")
	optparser.add_option(      "--disable", dest="enable", action="store_false", help="Enable given CloudFront distribution (only for [cfmodify] command)")
	optparser.add_option(      "--cf-add-cname", dest="cf_cnames_add", action="append", metavar="CNAME", help="Add given CNAME to a CloudFront distribution (only for [cfcreate] and [cfmodify] commands)")
	optparser.add_option(      "--cf-remove-cname", dest="cf_cnames_remove", action="append", metavar="CNAME", help="Remove given CNAME from a CloudFront distribution (only for [cfmodify] command)")
	optparser.add_option(      "--cf-comment", dest="cf_comment", action="store", metavar="COMMENT", help="Set COMMENT for a given CloudFront distribution (only for [cfcreate] and [cfmodify] commands)")
	optparser.add_option(      "--cf-default-root-object", dest="cf_default_root_object", action="store", metavar="DEFAULT_ROOT_OBJECT", help="Set the default root object to return when no object is specified in the URL. Use a relative path, i.e. default/index.html instead of /default/index.html or s3://bucket/default/index.html (only for [cfcreate] and [cfmodify] commands)")
	optparser.add_option("-v", "--verbose", dest="verbosity", action="store_const", const=logging.INFO, help="Enable verbose output.")
	optparser.add_option("-d", "--debug", dest="verbosity", action="store_const", const=logging.DEBUG, help="Enable debug output.")
	optparser.add_option(      "--version", dest="show_version", action="store_true", help="Show s3cmd version (%s) and exit." % (PkgInfo.version))
	optparser.add_option("-F", "--follow-symlinks", dest="follow_symlinks", action="store_true", default=False, help="Follow symbolic links as if they are regular files")

	optparser.set_usage(optparser.usage + " COMMAND [parameters]")
	optparser.set_description('S3cmd is a tool for managing objects in '+
		'Amazon S3 storage. It allows for making and removing '+
		'"buckets" and uploading, downloading and removing '+
		'"objects" from these buckets.')
	optparser.epilog = format_commands(optparser.get_prog_name(), commands_list)
	optparser.epilog += ("\nSee program homepage for more information at\n%s\n" % PkgInfo.url)

	(options, args) = optparser.parse_args()

	## Some mucking with logging levels to enable 
	## debugging/verbose output for config file parser on request
	logging.basicConfig(level=options.verbosity,
	                    format='%(levelname)s: %(message)s',
	                    stream = sys.stderr)
	
	if options.show_version:
		output(u"s3cmd version %s" % PkgInfo.version)
		sys.exit(0)

	## Now finally parse the config file
	if not options.config:
		error(u"Can't find a config file. Please use --config option.")
		sys.exit(1)

	try:
		cfg = Config(options.config)
	except IOError, e:
		if options.run_configure:
			cfg = Config()
		else:
			error(u"%s: %s"  % (options.config, e.strerror))
			error(u"Configuration file not available.")
			error(u"Consider using --configure parameter to create one.")
			sys.exit(1)

	## And again some logging level adjustments
	## according to configfile and command line parameters
	if options.verbosity != default_verbosity:
		cfg.verbosity = options.verbosity
	logging.root.setLevel(cfg.verbosity)

	## Default to --progress on TTY devices, --no-progress elsewhere
	## Can be overriden by actual --(no-)progress parameter
	cfg.update_option('progress_meter', sys.stdout.isatty())

	## Unsupported features on Win32 platform
	if os.name == "nt":
		if cfg.preserve_attrs:
			error(u"Option --preserve is not yet supported on MS Windows platform. Assuming --no-preserve.")
			cfg.preserve_attrs = False
		if cfg.progress_meter:
			error(u"Option --progress is not yet supported on MS Windows platform. Assuming --no-progress.")
			cfg.progress_meter = False

	## Pre-process --add-header's and put them to Config.extra_headers SortedDict()
	if options.add_header:
		for hdr in options.add_header:
			try:
				key, val = hdr.split(":", 1)
			except ValueError:
				raise ParameterError("Invalid header format: %s" % hdr)
			key_inval = re.sub("[a-zA-Z0-9-.]", "", key)
			if key_inval:
				key_inval = key_inval.replace(" ", "<space>")
				key_inval = key_inval.replace("\t", "<tab>")
				raise ParameterError("Invalid character(s) in header name '%s': \"%s\"" % (key, key_inval))
			debug(u"Updating Config.Config extra_headers[%s] -> %s" % (key.strip(), val.strip()))
			cfg.extra_headers[key.strip()] = val.strip()

	## --acl-grant/--acl-revoke arguments are pre-parsed by OptionS3ACL()
	if options.acl_grants:
		for grant in options.acl_grants:
			cfg.acl_grants.append(grant)

	if options.acl_revokes:
		for grant in options.acl_revokes:
			cfg.acl_revokes.append(grant)

	## Update Config with other parameters
	for option in cfg.option_list():
		try:
			if getattr(options, option) != None:
				debug(u"Updating Config.Config %s -> %s" % (option, getattr(options, option)))
				cfg.update_option(option, getattr(options, option))
		except AttributeError:
			## Some Config() options are not settable from command line
			pass

	## Special handling for tri-state options (True, False, None)
	cfg.update_option("enable", options.enable)
	cfg.update_option("acl_public", options.acl_public)

	## CloudFront's cf_enable and Config's enable share the same --enable switch
	options.cf_enable = options.enable

	## CloudFront's cf_logging and Config's log_target_prefix share the same --log-target-prefix switch
	options.cf_logging = options.log_target_prefix

	## Update CloudFront options if some were set
	for option in CfCmd.options.option_list():
		try:
			if getattr(options, option) != None:
				debug(u"Updating CloudFront.Cmd %s -> %s" % (option, getattr(options, option)))
				CfCmd.options.update_option(option, getattr(options, option))
		except AttributeError:
			## Some CloudFront.Cmd.Options() options are not settable from command line
			pass

	## Set output and filesystem encoding for printing out filenames.
	sys.stdout = codecs.getwriter(cfg.encoding)(sys.stdout, "replace")
	sys.stderr = codecs.getwriter(cfg.encoding)(sys.stderr, "replace")

	## Process --exclude and --exclude-from
	patterns_list, patterns_textual = process_patterns(options.exclude, options.exclude_from, is_glob = True, option_txt = "exclude")
	cfg.exclude.extend(patterns_list)
	cfg.debug_exclude.update(patterns_textual)

	## Process --rexclude and --rexclude-from
	patterns_list, patterns_textual = process_patterns(options.rexclude, options.rexclude_from, is_glob = False, option_txt = "rexclude")
	cfg.exclude.extend(patterns_list)
	cfg.debug_exclude.update(patterns_textual)

	## Process --include and --include-from
	patterns_list, patterns_textual = process_patterns(options.include, options.include_from, is_glob = True, option_txt = "include")
	cfg.include.extend(patterns_list)
	cfg.debug_include.update(patterns_textual)

	## Process --rinclude and --rinclude-from
	patterns_list, patterns_textual = process_patterns(options.rinclude, options.rinclude_from, is_glob = False, option_txt = "rinclude")
	cfg.include.extend(patterns_list)
	cfg.debug_include.update(patterns_textual)

        ## Process --follow-symlinks
	cfg.update_option("follow_symlinks", options.follow_symlinks)

	if cfg.encrypt and cfg.gpg_passphrase == "":
		error(u"Encryption requested but no passphrase set in config file.")
		error(u"Please re-run 's3cmd --configure' and supply it.")
		sys.exit(1)

	if options.dump_config:
		cfg.dump_config(sys.stdout)
		sys.exit(0)

	if options.run_configure:
		run_configure(options.config)
		sys.exit(0)

	if len(args) < 1:
		error(u"Missing command. Please run with --help for more information.")
		sys.exit(1)

	## Unicodise all remaining arguments:
	args = [unicodise(arg) for arg in args]

	command = args.pop(0)
	try:
		debug(u"Command: %s" % commands[command]["cmd"])
		## We must do this lookup in extra step to 
		## avoid catching all KeyError exceptions
		## from inner functions.
		cmd_func = commands[command]["func"]
	except KeyError, e:
		error(u"Invalid command: %s" % e)
		sys.exit(1)

	if len(args) < commands[command]["argc"]:
		error(u"Not enough paramters for command '%s'" % command)
		sys.exit(1)

	try:
		cmd_func(args)
	except S3Error, e:
		error(u"S3 error: %s" % e)
		sys.exit(1)

def report_exception(e):
		sys.stderr.write("""
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    An unexpected error has occurred.
  Please report the following lines to:
   s3tools-bugs@lists.sourceforge.net
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

""")
		tb = traceback.format_exc(sys.exc_info())
		e_class = str(e.__class__)
		e_class = e_class[e_class.rfind(".")+1 : -2]
		sys.stderr.write(u"Problem: %s: %s\n" % (e_class, e))
		try:
			sys.stderr.write("S3cmd:   %s\n" % PkgInfo.version)
		except NameError:
			sys.stderr.write("S3cmd:   unknown version. Module import problem?\n")
		sys.stderr.write("\n")
		sys.stderr.write(unicode(tb, errors="replace"))

		if type(e) == ImportError:
			sys.stderr.write("\n")
			sys.stderr.write("Your sys.path contains these entries:\n")
			for path in sys.path:
				sys.stderr.write(u"\t%s\n" % path)
			sys.stderr.write("Now the question is where have the s3cmd modules been installed?\n")

		sys.stderr.write("""
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    An unexpected error has occurred.
    Please report the above lines to:
   s3tools-bugs@lists.sourceforge.net
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
""")

if __name__ == '__main__':
	try:
		## Our modules
		## Keep them in try/except block to 
		## detect any syntax errors in there
		from S3.Exceptions import *
		from S3 import PkgInfo
		from S3.S3 import S3
		from S3.Config import Config
		from S3.SortedDict import SortedDict
		from S3.S3Uri import S3Uri
		from S3 import Utils
		from S3.Utils import *
		from S3.Progress import Progress
		from S3.CloudFront import Cmd as CfCmd

		main()
		sys.exit(0)

	except ImportError, e:
		report_exception(e)
		sys.exit(1)
		
	except ParameterError, e:
		error(u"Parameter problem: %s" % e)
		sys.exit(1)

	except SystemExit, e:
		sys.exit(e.code)

	except KeyboardInterrupt:
		sys.stderr.write("See ya!\n")
		sys.exit(1)

	except Exception, e:
		report_exception(e)
		sys.exit(1)