322 lines
9.8 KiB
Python
322 lines
9.8 KiB
Python
import os
|
|
import sys
|
|
import tempfile
|
|
import operator
|
|
import functools
|
|
import itertools
|
|
import re
|
|
|
|
import pkg_resources
|
|
|
|
if os.name == "java":
|
|
import org.python.modules.posix.PosixModule as _os
|
|
else:
|
|
_os = sys.modules[os.name]
|
|
try:
|
|
_file = file
|
|
except NameError:
|
|
_file = None
|
|
_open = open
|
|
from distutils.errors import DistutilsError
|
|
from pkg_resources import working_set
|
|
|
|
from setuptools.compat import builtins, execfile
|
|
|
|
__all__ = [
|
|
"AbstractSandbox", "DirectorySandbox", "SandboxViolation", "run_setup",
|
|
]
|
|
|
|
def run_setup(setup_script, args):
|
|
"""Run a distutils setup script, sandboxed in its directory"""
|
|
old_dir = os.getcwd()
|
|
save_argv = sys.argv[:]
|
|
save_path = sys.path[:]
|
|
setup_dir = os.path.abspath(os.path.dirname(setup_script))
|
|
temp_dir = os.path.join(setup_dir,'temp')
|
|
if not os.path.isdir(temp_dir): os.makedirs(temp_dir)
|
|
save_tmp = tempfile.tempdir
|
|
save_modules = sys.modules.copy()
|
|
pr_state = pkg_resources.__getstate__()
|
|
try:
|
|
tempfile.tempdir = temp_dir
|
|
os.chdir(setup_dir)
|
|
try:
|
|
sys.argv[:] = [setup_script]+list(args)
|
|
sys.path.insert(0, setup_dir)
|
|
# reset to include setup dir, w/clean callback list
|
|
working_set.__init__()
|
|
working_set.callbacks.append(lambda dist:dist.activate())
|
|
DirectorySandbox(setup_dir).run(
|
|
lambda: execfile(
|
|
"setup.py",
|
|
{'__file__':setup_script, '__name__':'__main__'}
|
|
)
|
|
)
|
|
except SystemExit:
|
|
v = sys.exc_info()[1]
|
|
if v.args and v.args[0]:
|
|
raise
|
|
# Normal exit, just return
|
|
finally:
|
|
pkg_resources.__setstate__(pr_state)
|
|
sys.modules.update(save_modules)
|
|
# remove any modules imported within the sandbox
|
|
del_modules = [
|
|
mod_name for mod_name in sys.modules
|
|
if mod_name not in save_modules
|
|
# exclude any encodings modules. See #285
|
|
and not mod_name.startswith('encodings.')
|
|
]
|
|
list(map(sys.modules.__delitem__, del_modules))
|
|
os.chdir(old_dir)
|
|
sys.path[:] = save_path
|
|
sys.argv[:] = save_argv
|
|
tempfile.tempdir = save_tmp
|
|
|
|
|
|
class AbstractSandbox:
|
|
"""Wrap 'os' module and 'open()' builtin for virtualizing setup scripts"""
|
|
|
|
_active = False
|
|
|
|
def __init__(self):
|
|
self._attrs = [
|
|
name for name in dir(_os)
|
|
if not name.startswith('_') and hasattr(self,name)
|
|
]
|
|
|
|
def _copy(self, source):
|
|
for name in self._attrs:
|
|
setattr(os, name, getattr(source,name))
|
|
|
|
def run(self, func):
|
|
"""Run 'func' under os sandboxing"""
|
|
try:
|
|
self._copy(self)
|
|
if _file:
|
|
builtins.file = self._file
|
|
builtins.open = self._open
|
|
self._active = True
|
|
return func()
|
|
finally:
|
|
self._active = False
|
|
if _file:
|
|
builtins.file = _file
|
|
builtins.open = _open
|
|
self._copy(_os)
|
|
|
|
def _mk_dual_path_wrapper(name):
|
|
original = getattr(_os,name)
|
|
def wrap(self,src,dst,*args,**kw):
|
|
if self._active:
|
|
src,dst = self._remap_pair(name,src,dst,*args,**kw)
|
|
return original(src,dst,*args,**kw)
|
|
return wrap
|
|
|
|
for name in ["rename", "link", "symlink"]:
|
|
if hasattr(_os,name): locals()[name] = _mk_dual_path_wrapper(name)
|
|
|
|
def _mk_single_path_wrapper(name, original=None):
|
|
original = original or getattr(_os,name)
|
|
def wrap(self,path,*args,**kw):
|
|
if self._active:
|
|
path = self._remap_input(name,path,*args,**kw)
|
|
return original(path,*args,**kw)
|
|
return wrap
|
|
|
|
if _file:
|
|
_file = _mk_single_path_wrapper('file', _file)
|
|
_open = _mk_single_path_wrapper('open', _open)
|
|
for name in [
|
|
"stat", "listdir", "chdir", "open", "chmod", "chown", "mkdir",
|
|
"remove", "unlink", "rmdir", "utime", "lchown", "chroot", "lstat",
|
|
"startfile", "mkfifo", "mknod", "pathconf", "access"
|
|
]:
|
|
if hasattr(_os,name): locals()[name] = _mk_single_path_wrapper(name)
|
|
|
|
def _mk_single_with_return(name):
|
|
original = getattr(_os,name)
|
|
def wrap(self,path,*args,**kw):
|
|
if self._active:
|
|
path = self._remap_input(name,path,*args,**kw)
|
|
return self._remap_output(name, original(path,*args,**kw))
|
|
return original(path,*args,**kw)
|
|
return wrap
|
|
|
|
for name in ['readlink', 'tempnam']:
|
|
if hasattr(_os,name): locals()[name] = _mk_single_with_return(name)
|
|
|
|
def _mk_query(name):
|
|
original = getattr(_os,name)
|
|
def wrap(self,*args,**kw):
|
|
retval = original(*args,**kw)
|
|
if self._active:
|
|
return self._remap_output(name, retval)
|
|
return retval
|
|
return wrap
|
|
|
|
for name in ['getcwd', 'tmpnam']:
|
|
if hasattr(_os,name): locals()[name] = _mk_query(name)
|
|
|
|
def _validate_path(self,path):
|
|
"""Called to remap or validate any path, whether input or output"""
|
|
return path
|
|
|
|
def _remap_input(self,operation,path,*args,**kw):
|
|
"""Called for path inputs"""
|
|
return self._validate_path(path)
|
|
|
|
def _remap_output(self,operation,path):
|
|
"""Called for path outputs"""
|
|
return self._validate_path(path)
|
|
|
|
def _remap_pair(self,operation,src,dst,*args,**kw):
|
|
"""Called for path pairs like rename, link, and symlink operations"""
|
|
return (
|
|
self._remap_input(operation+'-from',src,*args,**kw),
|
|
self._remap_input(operation+'-to',dst,*args,**kw)
|
|
)
|
|
|
|
|
|
if hasattr(os, 'devnull'):
|
|
_EXCEPTIONS = [os.devnull,]
|
|
else:
|
|
_EXCEPTIONS = []
|
|
|
|
try:
|
|
from win32com.client.gencache import GetGeneratePath
|
|
_EXCEPTIONS.append(GetGeneratePath())
|
|
del GetGeneratePath
|
|
except ImportError:
|
|
# it appears pywin32 is not installed, so no need to exclude.
|
|
pass
|
|
|
|
class DirectorySandbox(AbstractSandbox):
|
|
"""Restrict operations to a single subdirectory - pseudo-chroot"""
|
|
|
|
write_ops = dict.fromkeys([
|
|
"open", "chmod", "chown", "mkdir", "remove", "unlink", "rmdir",
|
|
"utime", "lchown", "chroot", "mkfifo", "mknod", "tempnam",
|
|
])
|
|
|
|
_exception_patterns = [
|
|
# Allow lib2to3 to attempt to save a pickled grammar object (#121)
|
|
'.*lib2to3.*\.pickle$',
|
|
]
|
|
"exempt writing to paths that match the pattern"
|
|
|
|
def __init__(self, sandbox, exceptions=_EXCEPTIONS):
|
|
self._sandbox = os.path.normcase(os.path.realpath(sandbox))
|
|
self._prefix = os.path.join(self._sandbox,'')
|
|
self._exceptions = [
|
|
os.path.normcase(os.path.realpath(path))
|
|
for path in exceptions
|
|
]
|
|
AbstractSandbox.__init__(self)
|
|
|
|
def _violation(self, operation, *args, **kw):
|
|
raise SandboxViolation(operation, args, kw)
|
|
|
|
if _file:
|
|
def _file(self, path, mode='r', *args, **kw):
|
|
if mode not in ('r', 'rt', 'rb', 'rU', 'U') and not self._ok(path):
|
|
self._violation("file", path, mode, *args, **kw)
|
|
return _file(path,mode,*args,**kw)
|
|
|
|
def _open(self, path, mode='r', *args, **kw):
|
|
if mode not in ('r', 'rt', 'rb', 'rU', 'U') and not self._ok(path):
|
|
self._violation("open", path, mode, *args, **kw)
|
|
return _open(path,mode,*args,**kw)
|
|
|
|
def tmpnam(self):
|
|
self._violation("tmpnam")
|
|
|
|
def _ok(self, path):
|
|
active = self._active
|
|
try:
|
|
self._active = False
|
|
realpath = os.path.normcase(os.path.realpath(path))
|
|
return (
|
|
self._exempted(realpath)
|
|
or realpath == self._sandbox
|
|
or realpath.startswith(self._prefix)
|
|
)
|
|
finally:
|
|
self._active = active
|
|
|
|
def _exempted(self, filepath):
|
|
start_matches = (
|
|
filepath.startswith(exception)
|
|
for exception in self._exceptions
|
|
)
|
|
pattern_matches = (
|
|
re.match(pattern, filepath)
|
|
for pattern in self._exception_patterns
|
|
)
|
|
candidates = itertools.chain(start_matches, pattern_matches)
|
|
return any(candidates)
|
|
|
|
def _remap_input(self, operation, path, *args, **kw):
|
|
"""Called for path inputs"""
|
|
if operation in self.write_ops and not self._ok(path):
|
|
self._violation(operation, os.path.realpath(path), *args, **kw)
|
|
return path
|
|
|
|
def _remap_pair(self, operation, src, dst, *args, **kw):
|
|
"""Called for path pairs like rename, link, and symlink operations"""
|
|
if not self._ok(src) or not self._ok(dst):
|
|
self._violation(operation, src, dst, *args, **kw)
|
|
return (src,dst)
|
|
|
|
def open(self, file, flags, mode=0o777, *args, **kw):
|
|
"""Called for low-level os.open()"""
|
|
if flags & WRITE_FLAGS and not self._ok(file):
|
|
self._violation("os.open", file, flags, mode, *args, **kw)
|
|
return _os.open(file,flags,mode, *args, **kw)
|
|
|
|
WRITE_FLAGS = functools.reduce(
|
|
operator.or_, [getattr(_os, a, 0) for a in
|
|
"O_WRONLY O_RDWR O_APPEND O_CREAT O_TRUNC O_TEMPORARY".split()]
|
|
)
|
|
|
|
class SandboxViolation(DistutilsError):
|
|
"""A setup script attempted to modify the filesystem outside the sandbox"""
|
|
|
|
def __str__(self):
|
|
return """SandboxViolation: %s%r %s
|
|
|
|
The package setup script has attempted to modify files on your system
|
|
that are not within the EasyInstall build area, and has been aborted.
|
|
|
|
This package cannot be safely installed by EasyInstall, and may not
|
|
support alternate installation locations even if you run its setup
|
|
script by hand. Please inform the package's author and the EasyInstall
|
|
maintainers to find out if a fix or workaround is available.""" % self.args
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#
|