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'''
mkfs.py - this file is part of S3QL (http://s3ql.googlecode.com)
Copyright (C) 2008-2009 Nikolaus Rath <Nikolaus@rath.org>
This program can be distributed under the terms of the GNU GPLv3.
'''
from __future__ import division, print_function, absolute_import
from getpass import getpass
from s3ql import CURRENT_FS_REV
from s3ql.backends.common import get_bucket, BetterBucket
from s3ql.common import (get_bucket_cachedir, setup_logging, QuietError,
dump_metadata, create_tables, init_tables)
from s3ql.database import Connection
from s3ql.parse_args import ArgumentParser
import cPickle as pickle
import logging
import os
import shutil
import sys
import time
log = logging.getLogger("mkfs")
def parse_args(args):
parser = ArgumentParser(
description="Initializes an S3QL file system")
parser.add_cachedir()
parser.add_authfile()
parser.add_debug_modules()
parser.add_quiet()
parser.add_version()
parser.add_storage_url()
parser.add_argument("-L", default='', help="Filesystem label",
dest="label", metavar='<name>',)
parser.add_argument("--blocksize", type=int, default=10240, metavar='<size>',
help="Maximum block size in KB (default: %(default)d)")
parser.add_argument("--plain", action="store_true", default=False,
help="Create unencrypted file system.")
parser.add_argument("--force", action="store_true", default=False,
help="Overwrite any existing data.")
options = parser.parse_args(args)
return options
def main(args=None):
if args is None:
args = sys.argv[1:]
options = parse_args(args)
setup_logging(options)
plain_bucket = get_bucket(options, plain=True)
if 's3ql_metadata' in plain_bucket:
if not options.force:
raise QuietError("Found existing file system! Use --force to overwrite")
log.info('Purging existing file system data..')
plain_bucket.clear()
if not plain_bucket.is_get_consistent():
log.info('Please note that the new file system may appear inconsistent\n'
'for a while until the removals have propagated through the backend.')
if not options.plain:
if sys.stdin.isatty():
wrap_pw = getpass("Enter encryption password: ")
if not wrap_pw == getpass("Confirm encryption password: "):
raise QuietError("Passwords don't match.")
else:
wrap_pw = sys.stdin.readline().rstrip()
# Generate data encryption passphrase
log.info('Generating random encryption key...')
fh = open('/dev/urandom', "rb", 0) # No buffering
data_pw = fh.read(32)
fh.close()
bucket = BetterBucket(wrap_pw, 'bzip2', plain_bucket)
bucket['s3ql_passphrase'] = data_pw
else:
data_pw = None
bucket = BetterBucket(data_pw, 'bzip2', plain_bucket)
# Setup database
cachepath = get_bucket_cachedir(options.storage_url, options.cachedir)
# There can't be a corresponding bucket, so we can safely delete
# these files.
if os.path.exists(cachepath + '.db'):
os.unlink(cachepath + '.db')
if os.path.exists(cachepath + '-cache'):
shutil.rmtree(cachepath + '-cache')
log.info('Creating metadata tables...')
db = Connection(cachepath + '.db')
create_tables(db)
init_tables(db)
param = dict()
param['revision'] = CURRENT_FS_REV
param['seq_no'] = 1
param['label'] = options.label
param['blocksize'] = options.blocksize * 1024
param['needs_fsck'] = False
param['last_fsck'] = time.time() - time.timezone
param['last-modified'] = time.time() - time.timezone
# This indicates that the convert_legacy_metadata() stuff
# in BetterBucket is not required for this file system.
param['bucket_revision'] = 1
bucket.store('s3ql_seq_no_%d' % param['seq_no'], 'Empty')
log.info('Uploading metadata...')
with bucket.open_write('s3ql_metadata', param) as fh:
dump_metadata(fh, db)
pickle.dump(param, open(cachepath + '.params', 'wb'), 2)
if __name__ == '__main__':
main(sys.argv[1:])
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