| 205 | return self.unique_name.exists() |
| 206 | |
| 207 | def kill_stale_lock(self): |
| 208 | try: |
| 209 | names = [p.name for p in self.path.iterdir()] |
| 210 | except FileNotFoundError: # another process did our job in the meantime. |
| 211 | return False |
| 212 | except PermissionError: # win32 might throw this. |
| 213 | return False |
| 214 | else: |
| 215 | for name in names: |
| 216 | try: |
| 217 | host_pid, thread_str = name.rsplit("-", 1) |
| 218 | host, pid_str = host_pid.rsplit(".", 1) |
| 219 | pid = int(pid_str) |
| 220 | thread = int(thread_str, 16) |
| 221 | except ValueError: |
| 222 | # Malformed lock name? Or just some new format we don't understand? |
| 223 | logger.error("Found malformed lock %s in %s. Please check/fix manually.", name, str(self.path)) |
| 224 | return False |
| 225 | |
| 226 | if platform.process_alive(host, pid, thread): |
| 227 | return False |
| 228 | |
| 229 | if not self.kill_stale_locks: |
| 230 | if not self.stale_warning_printed: |
| 231 | # Log this at warning level to hint the user at the ability |
| 232 | logger.warning( |
| 233 | "Found stale lock %s, but not deleting because self.kill_stale_locks = False.", name |
| 234 | ) |
| 235 | self.stale_warning_printed = True |
| 236 | return False |
| 237 | |
| 238 | try: |
| 239 | (self.path / name).unlink() |
| 240 | logger.warning("Killed stale lock %s.", name) |
| 241 | except OSError as err: |
| 242 | if not self.stale_warning_printed: |
| 243 | # This error will bubble up and likely result in locking failure |
| 244 | logger.error("Found stale lock %s, but cannot delete due to %s", name, str(err)) |
| 245 | self.stale_warning_printed = True |
| 246 | return False |
| 247 | |
| 248 | try: |
| 249 | self.path.rmdir() |
| 250 | except OSError as err: |
| 251 | if err.errno in (errno.ENOTEMPTY, errno.EEXIST, errno.ENOENT): |
| 252 | # Directory is not empty or doesn't exist any more = we lost the race to somebody else--which is ok. |
| 253 | return False |
| 254 | # EACCES or EIO or ... = we cannot operate anyway |
| 255 | logger.error("Failed to remove lock dir: %s", str(err)) |
| 256 | return False |
| 257 | |
| 258 | return True |
| 259 | |
| 260 | def break_lock(self): |
| 261 | if self.is_locked(): |