mirror of https://github.com/borgbackup/borg.git
591 lines
28 KiB
Python
591 lines
28 KiB
Python
import argparse
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from binascii import hexlify
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from datetime import datetime
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from operator import attrgetter
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import os
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import stat
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import sys
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from attic import __version__
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from attic.archive import Archive, ArchiveChecker
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from attic.repository import Repository
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from attic.cache import Cache
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from attic.key import key_creator
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from attic.helpers import Error, location_validator, format_time, \
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format_file_mode, ExcludePattern, exclude_path, adjust_patterns, to_localtime, \
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get_cache_dir, get_keys_dir, format_timedelta, prune_within, prune_split, \
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Manifest, remove_surrogates, update_excludes
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from attic.remote import RepositoryServer, RemoteRepository
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class Archiver:
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def __init__(self):
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self.exit_code = 0
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def open_repository(self, location, create=False):
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if location.proto == 'ssh':
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repository = RemoteRepository(location, create=create)
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else:
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repository = Repository(location.path, create=create)
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repository._location = location
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return repository
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def print_error(self, msg, *args):
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msg = args and msg % args or msg
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self.exit_code = 1
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print('attic: ' + msg, file=sys.stderr)
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def print_verbose(self, msg, *args, **kw):
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if self.verbose:
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msg = args and msg % args or msg
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if kw.get('newline', True):
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print(msg)
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else:
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print(msg, end=' ')
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def do_serve(self):
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return RepositoryServer().serve()
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def do_init(self, args):
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"""Initialize an empty repository
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"""
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print('Initializing repository at "%s"' % args.repository.orig)
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repository = self.open_repository(args.repository, create=True)
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key = key_creator(repository, args)
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manifest = Manifest(key, repository)
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manifest.key = key
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manifest.write()
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repository.commit()
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return self.exit_code
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def do_check(self, args):
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"""Check repository consistency
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"""
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repository = self.open_repository(args.repository)
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if args.repair:
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while not os.environ.get('ATTIC_CHECK_I_KNOW_WHAT_I_AM_DOING'):
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self.print_error("""Warning: 'check --repair' is an experimental feature that might result
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in data loss.
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Type "Yes I am sure" if you understand this and want to continue.\n""")
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if input('Do you want to continue? ') == 'Yes I am sure':
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break
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if args.progress is None:
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args.progress = sys.stdout.isatty() or args.verbose
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if not repository.check(progress=args.progress, repair=args.repair):
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return 1
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if not ArchiveChecker().check(repository, progress=args.progress, repair=args.repair):
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return 1
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return 0
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def do_change_passphrase(self, args):
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"""Change repository key file passphrase
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"""
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repository = self.open_repository(args.repository)
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manifest, key = Manifest.load(repository)
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key.change_passphrase()
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return 0
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def do_create(self, args):
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"""Create new archive
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"""
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t0 = datetime.now()
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repository = self.open_repository(args.archive)
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manifest, key = Manifest.load(repository)
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cache = Cache(repository, key, manifest)
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archive = Archive(repository, key, manifest, args.archive.archive, cache=cache,
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create=True, checkpoint_interval=args.checkpoint_interval,
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numeric_owner=args.numeric_owner)
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# Add Attic cache dir to inode_skip list
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skip_inodes = set()
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try:
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st = os.stat(get_cache_dir())
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skip_inodes.add((st.st_ino, st.st_dev))
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except IOError:
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pass
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# Add local repository dir to inode_skip list
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if not args.archive.host:
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try:
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st = os.stat(args.archive.path)
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skip_inodes.add((st.st_ino, st.st_dev))
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except IOError:
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pass
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for path in args.paths:
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path = os.path.normpath(path)
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if args.dontcross:
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try:
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restrict_dev = os.lstat(path).st_dev
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except OSError as e:
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self.print_error('%s: %s', path, e)
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continue
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else:
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restrict_dev = None
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self._process(archive, cache, args.excludes, skip_inodes, path, restrict_dev)
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archive.save()
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if args.stats:
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t = datetime.now()
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diff = t - t0
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print('-' * 40)
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print('Archive name: %s' % args.archive.archive)
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print('Archive fingerprint: %s' % hexlify(archive.id).decode('ascii'))
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print('Start time: %s' % t0.strftime('%c'))
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print('End time: %s' % t.strftime('%c'))
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print('Duration: %s' % format_timedelta(diff))
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archive.stats.print_()
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print('-' * 40)
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return self.exit_code
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def _process(self, archive, cache, excludes, skip_inodes, path, restrict_dev):
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if exclude_path(path, excludes):
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return
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try:
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st = os.lstat(path)
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except OSError as e:
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self.print_error('%s: %s', path, e)
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return
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if (st.st_ino, st.st_dev) in skip_inodes:
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return
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# Entering a new filesystem?
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if restrict_dev and st.st_dev != restrict_dev:
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return
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# Ignore unix sockets
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if stat.S_ISSOCK(st.st_mode):
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return
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self.print_verbose(remove_surrogates(path))
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if stat.S_ISREG(st.st_mode):
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try:
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archive.process_file(path, st, cache)
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except IOError as e:
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self.print_error('%s: %s', path, e)
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elif stat.S_ISDIR(st.st_mode):
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archive.process_item(path, st)
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try:
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entries = os.listdir(path)
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except OSError as e:
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self.print_error('%s: %s', path, e)
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else:
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for filename in sorted(entries):
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self._process(archive, cache, excludes, skip_inodes,
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os.path.join(path, filename), restrict_dev)
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elif stat.S_ISLNK(st.st_mode):
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archive.process_symlink(path, st)
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elif stat.S_ISFIFO(st.st_mode):
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archive.process_item(path, st)
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elif stat.S_ISCHR(st.st_mode) or stat.S_ISBLK(st.st_mode):
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archive.process_dev(path, st)
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else:
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self.print_error('Unknown file type: %s', path)
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def do_extract(self, args):
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"""Extract archive contents
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"""
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repository = self.open_repository(args.archive)
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manifest, key = Manifest.load(repository)
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archive = Archive(repository, key, manifest, args.archive.archive,
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numeric_owner=args.numeric_owner)
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patterns = adjust_patterns(args.paths, args.excludes)
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dirs = []
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for item in archive.iter_items(lambda item: not exclude_path(item[b'path'], patterns), preload=True):
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if not args.dry_run:
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while dirs and not item[b'path'].startswith(dirs[-1][b'path']):
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archive.extract_item(dirs.pop(-1))
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self.print_verbose(remove_surrogates(item[b'path']))
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try:
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if args.dry_run:
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archive.extract_item(item, dry_run=True)
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else:
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if stat.S_ISDIR(item[b'mode']):
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dirs.append(item)
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archive.extract_item(item, restore_attrs=False)
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else:
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archive.extract_item(item)
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except IOError as e:
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self.print_error('%s: %s', remove_surrogates(item[b'path']), e)
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if not args.dry_run:
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while dirs:
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archive.extract_item(dirs.pop(-1))
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return self.exit_code
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def do_delete(self, args):
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"""Delete archive
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"""
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repository = self.open_repository(args.archive)
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manifest, key = Manifest.load(repository)
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cache = Cache(repository, key, manifest)
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archive = Archive(repository, key, manifest, args.archive.archive, cache=cache)
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archive.delete(cache)
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return self.exit_code
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def do_mount(self, args):
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"""Mount archive as a FUSE fileystem
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"""
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try:
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from attic.fuse import AtticOperations
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except ImportError:
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self.print_error('the "llfuse" module is required to use this feature')
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return self.exit_code
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if not os.path.isdir(args.mountpoint) or not os.access(args.mountpoint, os.R_OK | os.W_OK | os.X_OK):
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self.print_error('%s: Mountpoint must be a writable directory' % args.mountpoint)
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return self.exit_code
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repository = self.open_repository(args.archive)
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manifest, key = Manifest.load(repository)
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self.print_verbose("Loading archive metadata...", newline=False)
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archive = Archive(repository, key, manifest, args.archive.archive)
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self.print_verbose('done')
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operations = AtticOperations(key, repository, archive)
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self.print_verbose("Mounting filesystem")
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try:
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operations.mount(args.mountpoint, args.options, args.foreground)
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except RuntimeError:
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# Relevant error message already printed to stderr by fuse
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self.exit_code = 1
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return self.exit_code
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def do_list(self, args):
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"""List archive or repository contents
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"""
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repository = self.open_repository(args.src)
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manifest, key = Manifest.load(repository)
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if args.src.archive:
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tmap = {1: 'p', 2: 'c', 4: 'd', 6: 'b', 0o10: '-', 0o12: 'l', 0o14: 's'}
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archive = Archive(repository, key, manifest, args.src.archive)
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for item in archive.iter_items():
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type = tmap.get(item[b'mode'] // 4096, '?')
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mode = format_file_mode(item[b'mode'])
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size = 0
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if type == '-':
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try:
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size = sum(size for _, size, _ in item[b'chunks'])
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except KeyError:
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pass
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mtime = format_time(datetime.fromtimestamp(item[b'mtime'] / 10**9))
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if b'source' in item:
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if type == 'l':
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extra = ' -> %s' % item[b'source']
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else:
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type = 'h'
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extra = ' link to %s' % item[b'source']
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else:
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extra = ''
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print('%s%s %-6s %-6s %8d %s %s%s' % (type, mode, item[b'user'] or item[b'uid'],
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item[b'group'] or item[b'gid'], size, mtime,
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remove_surrogates(item[b'path']), extra))
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else:
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for archive in sorted(Archive.list_archives(repository, key, manifest), key=attrgetter('ts')):
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print('%-20s %s' % (archive.metadata[b'name'], to_localtime(archive.ts).strftime('%c')))
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return self.exit_code
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def do_info(self, args):
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"""Show archive details such as disk space used
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"""
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repository = self.open_repository(args.archive)
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manifest, key = Manifest.load(repository)
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cache = Cache(repository, key, manifest)
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archive = Archive(repository, key, manifest, args.archive.archive, cache=cache)
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stats = archive.calc_stats(cache)
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print('Name:', archive.name)
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print('Fingerprint: %s' % hexlify(archive.id).decode('ascii'))
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print('Hostname:', archive.metadata[b'hostname'])
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print('Username:', archive.metadata[b'username'])
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print('Time: %s' % to_localtime(archive.ts).strftime('%c'))
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print('Command line:', remove_surrogates(' '.join(archive.metadata[b'cmdline'])))
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stats.print_()
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return self.exit_code
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def do_prune(self, args):
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"""Prune repository archives according to specified rules
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"""
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repository = self.open_repository(args.repository)
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manifest, key = Manifest.load(repository)
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cache = Cache(repository, key, manifest)
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archives = list(sorted(Archive.list_archives(repository, key, manifest, cache),
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key=attrgetter('ts'), reverse=True))
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if args.hourly + args.daily + args.weekly + args.monthly + args.yearly == 0 and args.within is None:
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self.print_error('At least one of the "within", "hourly", "daily", "weekly", "monthly" or "yearly" '
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'settings must be specified')
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return 1
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if args.prefix:
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archives = [archive for archive in archives if archive.name.startswith(args.prefix)]
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keep = []
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if args.within:
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keep += prune_within(archives, args.within)
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if args.hourly:
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keep += prune_split(archives, '%Y-%m-%d %H', args.hourly, keep)
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if args.daily:
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keep += prune_split(archives, '%Y-%m-%d', args.daily, keep)
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if args.weekly:
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keep += prune_split(archives, '%G-%V', args.weekly, keep)
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if args.monthly:
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keep += prune_split(archives, '%Y-%m', args.monthly, keep)
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if args.yearly:
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keep += prune_split(archives, '%Y', args.yearly, keep)
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keep.sort(key=attrgetter('ts'), reverse=True)
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to_delete = [a for a in archives if a not in keep]
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for archive in keep:
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self.print_verbose('Keeping archive "%s"' % archive.name)
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for archive in to_delete:
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self.print_verbose('Pruning archive "%s"', archive.name)
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archive.delete(cache)
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return self.exit_code
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helptext = {}
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helptext['patterns'] = '''
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Exclude patterns use a variant of shell pattern syntax, with '*' matching any
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number of characters, '?' matching any single character, '[...]' matching any
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single character specified, including ranges, and '[!...]' matching any
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character not specified. For the purpose of these patterns, the path
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separator ('\\' for Windows and '/' on other systems) is not treated
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specially. For a path to match a pattern, it must completely match from
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start to end, or must match from the start to just before a path separator.
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Except for the root path, paths will never end in the path separator when
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matching is attempted. Thus, if a given pattern ends in a path separator, a
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'*' is appended before matching is attempted. Patterns with wildcards should
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be quoted to protect them from shell expansion.
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Examples:
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# Exclude '/home/user/file.o' but not '/home/user/file.odt':
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$ attic create -e '*.o' repo.attic /
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# Exclude '/home/user/junk' and '/home/user/subdir/junk' but
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# not '/home/user/importantjunk' or '/etc/junk':
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$ attic create -e '/home/*/junk' repo.attic /
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# Exclude the contents of '/home/user/cache' but not the directory itself:
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$ attic create -e /home/user/cache/ repo.attic /
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# The file '/home/user/cache/important' is *not* backed up:
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$ attic create -e /home/user/cache/ repo.attic / /home/user/cache/important
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'''
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def do_help(self, args):
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if args.topic in self.helptext:
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print(self.helptext[args.topic])
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else:
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# FIXME: If topic is one of the regular commands, show that help.
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# Otherwise, show the default global help.
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print('No help available on %s' % (args.topic,))
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return self.exit_code
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def run(self, args=None):
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keys_dir = get_keys_dir()
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if not os.path.exists(keys_dir):
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os.makedirs(keys_dir)
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os.chmod(keys_dir, stat.S_IRWXU)
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cache_dir = get_cache_dir()
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if not os.path.exists(cache_dir):
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os.makedirs(cache_dir)
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os.chmod(cache_dir, stat.S_IRWXU)
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common_parser = argparse.ArgumentParser(add_help=False)
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common_parser.add_argument('-v', '--verbose', dest='verbose', action='store_true',
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default=False,
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help='verbose output')
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# We can't use argparse for "serve" since we don't want it to show up in "Available commands"
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if args and args[0] == 'serve':
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return self.do_serve()
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parser = argparse.ArgumentParser(description='Attic %s - Deduplicated Backups' % __version__)
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subparsers = parser.add_subparsers(title='Available commands')
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subparser = subparsers.add_parser('init', parents=[common_parser],
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description=self.do_init.__doc__)
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subparser.set_defaults(func=self.do_init)
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subparser.add_argument('repository', metavar='REPOSITORY',
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type=location_validator(archive=False),
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help='repository to create')
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subparser.add_argument('-e', '--encryption', dest='encryption',
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choices=('none', 'passphrase', 'keyfile'), default='none',
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help='select encryption method')
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check_epilog = """
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Progress status will be reported on the standard error stream by default when
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it is attached to a terminal. Any problems found are printed to the standard error
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stream and the command will have a non zero exit code.
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"""
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subparser = subparsers.add_parser('check', parents=[common_parser],
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description=self.do_check.__doc__,
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epilog=check_epilog)
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subparser.set_defaults(func=self.do_check)
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subparser.add_argument('repository', metavar='REPOSITORY',
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type=location_validator(archive=False),
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help='repository to check consistency of')
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subparser.add_argument('--progress', dest='progress', action='store_true',
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default=None,
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help='Report progress status to standard output stream')
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subparser.add_argument('--no-progress', dest='progress', action='store_false',
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help='Disable progress reporting')
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subparser.add_argument('--repair', dest='repair', action='store_true',
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default=False,
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help='Attempt to repair any inconsistencies found')
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subparser = subparsers.add_parser('change-passphrase', parents=[common_parser],
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description=self.do_change_passphrase.__doc__)
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subparser.set_defaults(func=self.do_change_passphrase)
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subparser.add_argument('repository', metavar='REPOSITORY',
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type=location_validator(archive=False))
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create_epilog = '''See "attic help patterns" for more help on exclude patterns.'''
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subparser = subparsers.add_parser('create', parents=[common_parser],
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description=self.do_create.__doc__,
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epilog=create_epilog)
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subparser.set_defaults(func=self.do_create)
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subparser.add_argument('-s', '--stats', dest='stats',
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action='store_true', default=False,
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help='print statistics for the created archive')
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subparser.add_argument('-e', '--exclude', dest='excludes',
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type=ExcludePattern, action='append',
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metavar="PATTERN", help='exclude paths matching PATTERN')
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subparser.add_argument('--exclude-from', dest='exclude_files',
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type=argparse.FileType('r'), action='append',
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metavar='EXCLUDEFILE', help='read exclude patterns from EXCLUDEFILE, one per line')
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subparser.add_argument('-c', '--checkpoint-interval', dest='checkpoint_interval',
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type=int, default=300, metavar='SECONDS',
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help='write checkpoint every SECONDS seconds (Default: 300)')
|
|
subparser.add_argument('--do-not-cross-mountpoints', dest='dontcross',
|
|
action='store_true', default=False,
|
|
help='do not cross mount points')
|
|
subparser.add_argument('--numeric-owner', dest='numeric_owner',
|
|
action='store_true', default=False,
|
|
help='only store numeric user and group identifiers')
|
|
subparser.add_argument('archive', metavar='ARCHIVE',
|
|
type=location_validator(archive=True),
|
|
help='archive to create')
|
|
subparser.add_argument('paths', metavar='PATH', nargs='+', type=str,
|
|
help='paths to archive')
|
|
|
|
extract_epilog = '''See "attic help patterns" for more help on exclude patterns.'''
|
|
|
|
subparser = subparsers.add_parser('extract', parents=[common_parser],
|
|
description=self.do_extract.__doc__,
|
|
epilog=extract_epilog)
|
|
subparser.set_defaults(func=self.do_extract)
|
|
subparser.add_argument('--dry-run', dest='dry_run',
|
|
default=False, action='store_true',
|
|
help='do not actually change any files')
|
|
subparser.add_argument('-e', '--exclude', dest='excludes',
|
|
type=ExcludePattern, action='append',
|
|
metavar="PATTERN", help='exclude paths matching PATTERN')
|
|
subparser.add_argument('--exclude-from', dest='exclude_files',
|
|
type=argparse.FileType('r'), action='append',
|
|
metavar='EXCLUDEFILE', help='read exclude patterns from EXCLUDEFILE, one per line')
|
|
subparser.add_argument('--numeric-owner', dest='numeric_owner',
|
|
action='store_true', default=False,
|
|
help='only obey numeric user and group identifiers')
|
|
subparser.add_argument('archive', metavar='ARCHIVE',
|
|
type=location_validator(archive=True),
|
|
help='archive to extract')
|
|
subparser.add_argument('paths', metavar='PATH', nargs='*', type=str,
|
|
help='paths to extract')
|
|
|
|
subparser = subparsers.add_parser('delete', parents=[common_parser],
|
|
description=self.do_delete.__doc__)
|
|
subparser.set_defaults(func=self.do_delete)
|
|
subparser.add_argument('archive', metavar='ARCHIVE',
|
|
type=location_validator(archive=True),
|
|
help='archive to delete')
|
|
|
|
subparser = subparsers.add_parser('list', parents=[common_parser],
|
|
description=self.do_list.__doc__)
|
|
subparser.set_defaults(func=self.do_list)
|
|
subparser.add_argument('src', metavar='REPOSITORY_OR_ARCHIVE', type=location_validator(),
|
|
help='repository/archive to list contents of')
|
|
|
|
subparser = subparsers.add_parser('mount', parents=[common_parser],
|
|
description=self.do_mount.__doc__)
|
|
subparser.set_defaults(func=self.do_mount)
|
|
subparser.add_argument('archive', metavar='ARCHIVE', type=location_validator(archive=True),
|
|
help='archive to mount')
|
|
subparser.add_argument('mountpoint', metavar='MOUNTPOINT', type=str,
|
|
help='where to mount filesystem')
|
|
subparser.add_argument('-f', '--foreground', dest='foreground',
|
|
action='store_true', default=False,
|
|
help='stay in foreground, do not daemonize')
|
|
subparser.add_argument('-o', dest='options', type=str,
|
|
help='Extra mount options')
|
|
|
|
subparser = subparsers.add_parser('info', parents=[common_parser],
|
|
description=self.do_info.__doc__)
|
|
subparser.set_defaults(func=self.do_info)
|
|
subparser.add_argument('archive', metavar='ARCHIVE',
|
|
type=location_validator(archive=True),
|
|
help='archive to display information about')
|
|
|
|
prune_epilog = '''The prune command prunes a repository by deleting archives
|
|
not matching any of the specified retention options. This command is normally
|
|
used by automated backup scripts wanting to keep a certain number of historic
|
|
backups. As an example, "-d 7" means to keep the latest backup on each day
|
|
for 7 days. Days without backups do not count towards the total. The rules
|
|
are applied from hourly to yearly, and backups selected by previous rules do
|
|
not count towards those of later rules. Dates and times are interpreted in
|
|
the local timezone, and weeks go from Monday to Sunday. Specifying a
|
|
negative number of archives to keep means that there is no limit.
|
|
The "--within" option takes an argument of the form "<int><char>",
|
|
where char is "H", "d", "w", "m", "y". For example, "--within 2d" means
|
|
to keep all archives that were created within the past 48 hours.
|
|
"1m" is taken to mean "31d". The archives kept with this option do not
|
|
count towards the totals specified by any other options. If a
|
|
prefix is set with -p, then only archives that start with the prefix are
|
|
considered for deletion and only those archives count towards the totals
|
|
specified by the rules.'''
|
|
|
|
subparser = subparsers.add_parser('prune', parents=[common_parser],
|
|
description=self.do_prune.__doc__,
|
|
epilog=prune_epilog)
|
|
subparser.set_defaults(func=self.do_prune)
|
|
subparser.add_argument('--within', dest='within', type=str, metavar='WITHIN',
|
|
help='keep all archives within this time interval')
|
|
subparser.add_argument('-H', '--hourly', dest='hourly', type=int, default=0,
|
|
help='number of hourly archives to keep')
|
|
subparser.add_argument('-d', '--daily', dest='daily', type=int, default=0,
|
|
help='number of daily archives to keep')
|
|
subparser.add_argument('-w', '--weekly', dest='weekly', type=int, default=0,
|
|
help='number of weekly archives to keep')
|
|
subparser.add_argument('-m', '--monthly', dest='monthly', type=int, default=0,
|
|
help='number of monthly archives to keep')
|
|
subparser.add_argument('-y', '--yearly', dest='yearly', type=int, default=0,
|
|
help='number of yearly archives to keep')
|
|
subparser.add_argument('-p', '--prefix', dest='prefix', type=str,
|
|
help='only consider archive names starting with this prefix')
|
|
subparser.add_argument('repository', metavar='REPOSITORY',
|
|
type=location_validator(archive=False),
|
|
help='repository to prune')
|
|
|
|
subparser = subparsers.add_parser('help', parents=[common_parser],
|
|
description='Extra help')
|
|
subparser.set_defaults(func=self.do_help)
|
|
subparser.add_argument('topic', metavar='TOPIC', type=str,
|
|
help='additional help on TOPIC')
|
|
|
|
args = parser.parse_args(args or ['-h'])
|
|
self.verbose = args.verbose
|
|
update_excludes(args)
|
|
return args.func(args)
|
|
|
|
|
|
def main():
|
|
archiver = Archiver()
|
|
try:
|
|
exit_code = archiver.run(sys.argv[1:])
|
|
except Error as e:
|
|
archiver.print_error(e.get_message())
|
|
exit_code = e.exit_code
|
|
except KeyboardInterrupt:
|
|
archiver.print_error('Error: Keyboard interrupt')
|
|
exit_code = 1
|
|
else:
|
|
if exit_code:
|
|
archiver.print_error('Exiting with failure status due to previous errors')
|
|
sys.exit(exit_code)
|
|
|
|
if __name__ == '__main__':
|
|
main()
|