| # Copyright 2012 Gentoo Foundation |
| # Distributed under the terms of the GNU General Public License v2 |
| |
| from portage import os |
| from portage.util._ctypes import find_library, LoadLibrary |
| from portage.util._async.ForkProcess import ForkProcess |
| |
| class SyncfsProcess(ForkProcess): |
| """ |
| Isolate ctypes usage in a subprocess, in order to avoid |
| potential problems with stale cached libraries as |
| described in bug #448858, comment #14 (also see |
| http://bugs.python.org/issue14597). |
| """ |
| |
| __slots__ = ('paths',) |
| |
| @staticmethod |
| def _get_syncfs(): |
| |
| filename = find_library("c") |
| if filename is not None: |
| library = LoadLibrary(filename) |
| if library is not None: |
| try: |
| return library.syncfs |
| except AttributeError: |
| pass |
| |
| return None |
| |
| def _run(self): |
| |
| syncfs_failed = False |
| syncfs = self._get_syncfs() |
| |
| if syncfs is not None: |
| for path in self.paths: |
| try: |
| fd = os.open(path, os.O_RDONLY) |
| except OSError: |
| pass |
| else: |
| try: |
| if syncfs(fd) != 0: |
| # Happens with PyPy (bug #446610) |
| syncfs_failed = True |
| finally: |
| os.close(fd) |
| |
| if syncfs is None or syncfs_failed: |
| return 1 |
| return os.EX_OK |
