|
|
from __future__ import absolute_import
|
|
|
|
|
|
import errno
|
|
|
import os
|
|
|
import posixpath
|
|
|
import stat
|
|
|
|
|
|
from .i18n import _
|
|
|
from . import (
|
|
|
encoding,
|
|
|
error,
|
|
|
util,
|
|
|
)
|
|
|
|
|
|
def _lowerclean(s):
|
|
|
return encoding.hfsignoreclean(s.lower())
|
|
|
|
|
|
class pathauditor(object):
|
|
|
'''ensure that a filesystem path contains no banned components.
|
|
|
the following properties of a path are checked:
|
|
|
|
|
|
- ends with a directory separator
|
|
|
- under top-level .hg
|
|
|
- starts at the root of a windows drive
|
|
|
- contains ".."
|
|
|
|
|
|
More check are also done about the file system states:
|
|
|
- traverses a symlink (e.g. a/symlink_here/b)
|
|
|
- inside a nested repository (a callback can be used to approve
|
|
|
some nested repositories, e.g., subrepositories)
|
|
|
|
|
|
The file system checks are only done when 'realfs' is set to True (the
|
|
|
default). They should be disable then we are auditing path for operation on
|
|
|
stored history.
|
|
|
'''
|
|
|
|
|
|
def __init__(self, root, callback=None, realfs=True):
|
|
|
self.audited = set()
|
|
|
self.auditeddir = set()
|
|
|
self.root = root
|
|
|
self._realfs = realfs
|
|
|
self.callback = callback
|
|
|
if os.path.lexists(root) and not util.checkcase(root):
|
|
|
self.normcase = util.normcase
|
|
|
else:
|
|
|
self.normcase = lambda x: x
|
|
|
|
|
|
def __call__(self, path):
|
|
|
'''Check the relative path.
|
|
|
path may contain a pattern (e.g. foodir/**.txt)'''
|
|
|
|
|
|
path = util.localpath(path)
|
|
|
normpath = self.normcase(path)
|
|
|
if normpath in self.audited:
|
|
|
return
|
|
|
# AIX ignores "/" at end of path, others raise EISDIR.
|
|
|
if util.endswithsep(path):
|
|
|
raise error.Abort(_("path ends in directory separator: %s") % path)
|
|
|
parts = util.splitpath(path)
|
|
|
if (os.path.splitdrive(path)[0]
|
|
|
or _lowerclean(parts[0]) in ('.hg', '.hg.', '')
|
|
|
or os.pardir in parts):
|
|
|
raise error.Abort(_("path contains illegal component: %s") % path)
|
|
|
# Windows shortname aliases
|
|
|
for p in parts:
|
|
|
if "~" in p:
|
|
|
first, last = p.split("~", 1)
|
|
|
if last.isdigit() and first.upper() in ["HG", "HG8B6C"]:
|
|
|
raise error.Abort(_("path contains illegal component: %s")
|
|
|
% path)
|
|
|
if '.hg' in _lowerclean(path):
|
|
|
lparts = [_lowerclean(p.lower()) for p in parts]
|
|
|
for p in '.hg', '.hg.':
|
|
|
if p in lparts[1:]:
|
|
|
pos = lparts.index(p)
|
|
|
base = os.path.join(*parts[:pos])
|
|
|
raise error.Abort(_("path '%s' is inside nested repo %r")
|
|
|
% (path, base))
|
|
|
|
|
|
normparts = util.splitpath(normpath)
|
|
|
assert len(parts) == len(normparts)
|
|
|
|
|
|
parts.pop()
|
|
|
normparts.pop()
|
|
|
prefixes = []
|
|
|
# It's important that we check the path parts starting from the root.
|
|
|
# This means we won't accidentaly traverse a symlink into some other
|
|
|
# filesystem (which is potentially expensive to access).
|
|
|
for i in range(len(parts)):
|
|
|
prefix = os.sep.join(parts[:i + 1])
|
|
|
normprefix = os.sep.join(normparts[:i + 1])
|
|
|
if normprefix in self.auditeddir:
|
|
|
continue
|
|
|
if self._realfs:
|
|
|
self._checkfs(prefix, path)
|
|
|
prefixes.append(normprefix)
|
|
|
|
|
|
self.audited.add(normpath)
|
|
|
# only add prefixes to the cache after checking everything: we don't
|
|
|
# want to add "foo/bar/baz" before checking if there's a "foo/.hg"
|
|
|
self.auditeddir.update(prefixes)
|
|
|
|
|
|
def _checkfs(self, prefix, path):
|
|
|
"""raise exception if a file system backed check fails"""
|
|
|
curpath = os.path.join(self.root, prefix)
|
|
|
try:
|
|
|
st = os.lstat(curpath)
|
|
|
except OSError as err:
|
|
|
# EINVAL can be raised as invalid path syntax under win32.
|
|
|
# They must be ignored for patterns can be checked too.
|
|
|
if err.errno not in (errno.ENOENT, errno.ENOTDIR, errno.EINVAL):
|
|
|
raise
|
|
|
else:
|
|
|
if stat.S_ISLNK(st.st_mode):
|
|
|
msg = _('path %r traverses symbolic link %r') % (path, prefix)
|
|
|
raise error.Abort(msg)
|
|
|
elif (stat.S_ISDIR(st.st_mode) and
|
|
|
os.path.isdir(os.path.join(curpath, '.hg'))):
|
|
|
if not self.callback or not self.callback(curpath):
|
|
|
msg = _("path '%s' is inside nested repo %r")
|
|
|
raise error.Abort(msg % (path, prefix))
|
|
|
|
|
|
def check(self, path):
|
|
|
try:
|
|
|
self(path)
|
|
|
return True
|
|
|
except (OSError, error.Abort):
|
|
|
return False
|
|
|
|
|
|
def canonpath(root, cwd, myname, auditor=None):
|
|
|
'''return the canonical path of myname, given cwd and root'''
|
|
|
if util.endswithsep(root):
|
|
|
rootsep = root
|
|
|
else:
|
|
|
rootsep = root + os.sep
|
|
|
name = myname
|
|
|
if not os.path.isabs(name):
|
|
|
name = os.path.join(root, cwd, name)
|
|
|
name = os.path.normpath(name)
|
|
|
if auditor is None:
|
|
|
auditor = pathauditor(root)
|
|
|
if name != rootsep and name.startswith(rootsep):
|
|
|
name = name[len(rootsep):]
|
|
|
auditor(name)
|
|
|
return util.pconvert(name)
|
|
|
elif name == root:
|
|
|
return ''
|
|
|
else:
|
|
|
# Determine whether `name' is in the hierarchy at or beneath `root',
|
|
|
# by iterating name=dirname(name) until that causes no change (can't
|
|
|
# check name == '/', because that doesn't work on windows). The list
|
|
|
# `rel' holds the reversed list of components making up the relative
|
|
|
# file name we want.
|
|
|
rel = []
|
|
|
while True:
|
|
|
try:
|
|
|
s = util.samefile(name, root)
|
|
|
except OSError:
|
|
|
s = False
|
|
|
if s:
|
|
|
if not rel:
|
|
|
# name was actually the same as root (maybe a symlink)
|
|
|
return ''
|
|
|
rel.reverse()
|
|
|
name = os.path.join(*rel)
|
|
|
auditor(name)
|
|
|
return util.pconvert(name)
|
|
|
dirname, basename = util.split(name)
|
|
|
rel.append(basename)
|
|
|
if dirname == name:
|
|
|
break
|
|
|
name = dirname
|
|
|
|
|
|
# A common mistake is to use -R, but specify a file relative to the repo
|
|
|
# instead of cwd. Detect that case, and provide a hint to the user.
|
|
|
hint = None
|
|
|
try:
|
|
|
if cwd != root:
|
|
|
canonpath(root, root, myname, auditor)
|
|
|
hint = (_("consider using '--cwd %s'")
|
|
|
% os.path.relpath(root, cwd))
|
|
|
except error.Abort:
|
|
|
pass
|
|
|
|
|
|
raise error.Abort(_("%s not under root '%s'") % (myname, root),
|
|
|
hint=hint)
|
|
|
|
|
|
def normasprefix(path):
|
|
|
'''normalize the specified path as path prefix
|
|
|
|
|
|
Returned value can be used safely for "p.startswith(prefix)",
|
|
|
"p[len(prefix):]", and so on.
|
|
|
|
|
|
For efficiency, this expects "path" argument to be already
|
|
|
normalized by "os.path.normpath", "os.path.realpath", and so on.
|
|
|
|
|
|
See also issue3033 for detail about need of this function.
|
|
|
|
|
|
>>> normasprefix('/foo/bar').replace(os.sep, '/')
|
|
|
'/foo/bar/'
|
|
|
>>> normasprefix('/').replace(os.sep, '/')
|
|
|
'/'
|
|
|
'''
|
|
|
d, p = os.path.splitdrive(path)
|
|
|
if len(p) != len(os.sep):
|
|
|
return path + os.sep
|
|
|
else:
|
|
|
return path
|
|
|
|
|
|
# forward two methods from posixpath that do what we need, but we'd
|
|
|
# rather not let our internals know that we're thinking in posix terms
|
|
|
# - instead we'll let them be oblivious.
|
|
|
join = posixpath.join
|
|
|
dirname = posixpath.dirname
|
|
|
|
