def walk(self):
'''Walks the directory tree specified by targets, yielding all accessible regular files as Walker.Target objects'''
# compile all the information required to walk the targets
targets = set(self._targets)
fskip_fstype = self.build_fskip_globs(self._skip_fstypes)
fskip_path = self.build_fskip_globs(self._skip_paths)
fskip_name = self.build_fskip_globs(self._skip_names)
fskip_dirname = self.build_fskip_globs(self._skip_dirnames)
fskip_filename = self.build_fskip_globs(self._skip_filenames)
fskip_access = None
skip_binds = self._skip_binds
skip_mounts = self._skip_mounts
skip_symlinks = self._skip_symlinks
is_linuxy = False
mounts = MountEntries()
if platform.system() != 'Windows':
is_linuxy = True
def fskip_access(target):
access = stat.S_IMODE(target.stat.st_mode)
if access & (stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH) == 0:
# usr, grp, oth : no access
return True
elif target.stat.st_uid == euid:
# usr
if access & stat.S_IRUSR == 0:
return True
elif access & (stat.S_IRGRP | stat.S_IROTH) == 0:
# grp, oth : no access
return True
elif target.stat.st_gid in groups:
# grp
if access & stat.S_IRGRP == 0:
return True
elif access & (stat.S_IROTH) == 0:
# oth : no access
return True
# Note that this may return some erronious negatives.
# The objective is to try to avoid access errors, not prevent them entirely
# Note that we could also use os.access, but that would cause additional
# os.stat calls, and we want speed
return False
fskip_access.func_globals['uid'] = os.getuid()
fskip_access.func_globals['euid'] = os.geteuid()
fskip_access.func_globals['gid'] = os.getgid()
fskip_access.func_globals['egid'] = os.getegid()
fskip_access.func_globals['groups'] = os.getgroups()
if os.geteuid() == 0:
fskip_access = None # No need to skip things if we are root
try:
todo = deque()
dirs = deque()
if self.walk_depth:
fappend = dirs.appendleft
def fdone():
todo.extendleft(dirs)
dirs.clear()
else:
fappend = todo.append
def fdone():
pass
for target in targets:
log.verbose(PREFIX_ROOT + '%s (root)' % target.user)
if stat.S_ISREG(target.stat.st_mode):
yield target
if stat.S_ISDIR(target.stat.st_mode):
todo.clear()
todo.append((target, [(target.stat.st_ino,
target.stat.st_dev)]))
while True:
try:
target, nodes = todo.popleft()
except IndexError, _:
break # Reached the last element in the list
try:
filelist = os.listdir(target.true)
filelist.sort()
except OSError, ex:
log.warning('warning: Unable to list target %r: %s'
% (target.user, ex))
continue
for name in filelist:
child = Walker.Target(
os.path.join(target.true, name),
os.path.join(target.user, name), None)
# skip name?
if fskip_name and fskip_name(name):
if log.is_debug:
log.debug(PREFIX_SKIP +
'%s (skip_name)' % child.user)
continue
# skip path?
if fskip_path and fskip_path(child.user):
if log.is_debug:
log.debug(PREFIX_SKIP +
'%s (skip_path)' % child.user)
continue
# stat
try:
child = child._replace(
stat=os.lstat(child.true))
except OSError, ex:
log.warning('warning: Unable to lstat %r: %s' %
(child.user, ex))
if log.is_debug:
log.debug(PREFIX_SKIP +
'%r (failed lstat)' % child.user)
continue
# recursive loop?
if (child.stat.st_ino, child.stat.st_dev) in nodes:
log.debug(
PREFIX_SKIP +
'%r (loop chain detected)' % child.user)
continue
# check access
if fskip_access and fskip_access(child):
log.debug(PREFIX_SKIP +
'%r (no access)' % child.user)
continue
# resolve symlinks
if stat.S_ISLNK(child.stat.st_mode):
if skip_symlinks:
log.debug(
PREFIX_SKIP +
'%r (skip_symlinks)' % child.user)
continue
log.debug(PREFIX_SYM +
'%s (sym link)' % child.user)
try:
child = child._replace(
true=mounts.truepath(child.true))
child = child._replace(
stat=os.lstat(child.true))
except OSError, ex:
log.warning(
'warning: Unable to read symlink target %r: %s'
% (child.user, ex))
if log.is_debug:
log.debug(
PREFIX_SKIP +
'%r (failed to read symlink target)'
% child.user)
continue
# recursive loop?
if (child.stat.st_ino,
child.stat.st_dev) in nodes:
log.debug(PREFIX_SKIP +
'%r (loop chain detected)' %
child.user)
continue
# check access
if fskip_access != None and fskip_access(
child):
log.debug(PREFIX_SKIP +
'%r (no access)' % child.user)
continue
# Need to recalculate child.true/..
parent_stat = None
else:
parent_stat = target.stat
# regular file?
if stat.S_ISREG(child.stat.st_mode):
# skip filename?
if fskip_filename and fskip_filename(name):
if log.is_debug:
log.debug(
PREFIX_SKIP +
'%r (skip_filename)' % child.user)
continue
if log.is_verbose:
log.verbose(
PREFIX_REG +
'%s (regular file)' % child.user)
yield child
continue
# directory?
if stat.S_ISDIR(child.stat.st_mode):
# skip dirname?
if fskip_dirname and fskip_dirname(name):
if log.is_debug:
log.debug(
PREFIX_SKIP +
'%s (skip_dirname)' % child.user)
continue
# is bind? ToDo: Should this check be in a loop for bind chains?
if mounts.is_bind(child.true):
# skip binds?
if skip_binds:
if log.is_debug:
log.debug(
PREFIX_SKIP +
'%s (skip_binds)' % child.user)
continue
log.debug(PREFIX_BIND +
'%s (bind mount)' % child.user)
try:
child = child._replace(
true=mounts.truepath(child.true))
child = child._replace(
stat=os.lstat(child.true))
except OSError, ex:
log.warning(
'warning: Unable to read bind target %r: %s'
% (child.user, ex))
if log.is_debug:
log.debug(
PREFIX_SKIP +
'%r (failed to read bind target)'
% (child.user, ex))
continue
# recursive loop?
if (child.stat.st_ino,
child.stat.st_dev) in nodes:
log.debug(PREFIX_SKIP +
'%r (loop chain detected)' %
child.user)
continue
# check access
if fskip_access != None and fskip_access(
child):
log.debug(
PREFIX_SKIP +
'%r (no access)' % child.user)
continue
parent_stat = None
# get parent stat
if is_linuxy and parent_stat == None:
try:
parent_stat = os.lstat(
os.path.join(child.true, '..'))
except OSError, ex:
log.warning(
'warning: Unable to read parent %r: %s'
% (os.path.join(child.user, '..'),
ex))
# is mount?
keep = None
if (is_linuxy and (parent_stat != None))\
and ((parent_stat.st_dev != child.stat.st_dev)\
or (parent_stat.st_ino == child.stat.st_ino)):
# skip mounts?
if skip_mounts:
log.debug(
PREFIX_SKIP +
'%r (skip_mounts)' % child.user)
continue
# skip fstype?
if fskip_fstype:
# find fstype, updating mount points if required
fstype = mounts.get_fstype(child.true)
##if fstype == None:
## mounts = MountEntries()
## fstype = mounts.get_fstype(child.true)
if fstype == None:
log.warning(
'warning: Unable to resolve mount fstype %r'
% child.user)
log.debug(
PREFIX_SKIP +
'%s (failed to resolve mount fstype)'
% child.user)
continue
mounts = mounts
if fskip_fstype(fstype.type):
if log.is_debug:
log.debug(PREFIX_SKIP +
'%s (skip_fstype)' %
child.user)
continue
# directory
if log.is_verbose:
log.verbose(PREFIX_DIR +
'%s (directory)' % child.user)
# put directory in the todo list
fappend((child, nodes + [(child.stat.st_ino,
child.stat.st_dev)]))
continue
def view(self):
# Setup logging
log.setLevel(self.setting_verbosity)
# Display configuration
display_settings(self.settings, log.debug)
# Setup database
log.debug("* setup database's...")
db = HashDatabase(self.setting_database)
db.add_combines(self.setting_combine)
if not db.open():
return
# Read mounts (for truepath)
mounts = MountEntries()
# Build a query string, filtering on targets
targets = [mounts.truepath(t) for t in self.setting_targets]
qfilters = []
qargmap = {}
if ("/" not in targets) and ("\\" not in targets) and ("//" not in targets) and ("\\\\" not in targets):
for i, target in enumerate(targets):
target = mounts.truepath(target)
qfilters.append(
r"""(path = :%(name)s) OR (substr(path, 1, :%(name)s_len + 1) = :%(name)s || '/')"""
% {"name": "t%02d" % i}
)
qargmap.update({"t%02d" % i: target, "t%02d_len" % i: len(target)})
qfilter = (r"""WHERE """ + r""" OR """.join(qfilters)) if len(qfilters) != 0 else r""""""
qorder = (
r"""
ORDER BY
path,
mark DESC
"""
if self.setting_walk_depth
else r"""
ORDER BY
count_components(path),
path,
mark DESC
"""
)
query = (
r"""
SELECT
*
FROM
combinedtab
"""
+ qfilter
+ qorder
)
# yield all results as a HashRowData blob (don't expose the underlying row)
for row in db.connection.execute(query, qargmap):
yield (
HashRowData(path=row["path"], hash=row["hash"], mark=row["mark"], time=row["time"], size=row["size"]),
db,
)
