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| author | John Snow <jsnow@redhat.com> | 2020-10-06 19:58:05 -0400 |
|---|---|---|
| committer | John Snow <jsnow@redhat.com> | 2020-10-20 09:37:57 -0400 |
| commit | 9223fda464690b83a2b1f1487163f50602454c2e (patch) | |
| tree | 0bae4863fc931796bcdf6796c593e2e18a7255a5 /python/qemu | |
| parent | be1183e52f49cd0f9c1a855afe4c4a5455f966d1 (diff) | |
| download | qemu-9223fda464690b83a2b1f1487163f50602454c2e.zip qemu-9223fda464690b83a2b1f1487163f50602454c2e.tar.gz qemu-9223fda464690b83a2b1f1487163f50602454c2e.tar.bz2 | |
python/machine.py: fix _popen access
As always, Optional[T] causes problems with unchecked access. Add a
helper that asserts the pipe is present before we attempt to talk with
it.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 20201006235817.3280413-9-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Diffstat (limited to 'python/qemu')
| -rw-r--r-- | python/qemu/machine.py | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/python/qemu/machine.py b/python/qemu/machine.py index 3e9cf09..4e762fc 100644 --- a/python/qemu/machine.py +++ b/python/qemu/machine.py @@ -131,7 +131,7 @@ class QEMUMachine: # Runstate self._qemu_log_path = None self._qemu_log_file = None - self._popen = None + self._popen: Optional['subprocess.Popen[bytes]'] = None self._events = [] self._iolog = None self._qmp_set = True # Enable QMP monitor by default. @@ -244,6 +244,12 @@ class QEMUMachine: """Returns true if the VM is running.""" return self._popen is not None and self._popen.poll() is None + @property + def _subp(self) -> 'subprocess.Popen[bytes]': + if self._popen is None: + raise QEMUMachineError('Subprocess pipe not present') + return self._popen + def exitcode(self): """Returns the exit code if possible, or None.""" if self._popen is None: @@ -254,7 +260,7 @@ class QEMUMachine: """Returns the PID of the running process, or None.""" if not self.is_running(): return None - return self._popen.pid + return self._subp.pid def _load_io_log(self): if self._qemu_log_path is not None: @@ -415,8 +421,8 @@ class QEMUMachine: waiting for the QEMU process to terminate. """ self._early_cleanup() - self._popen.kill() - self._popen.wait(timeout=60) + self._subp.kill() + self._subp.wait(timeout=60) def _soft_shutdown(self, timeout: Optional[int], has_quit: bool = False) -> None: @@ -440,7 +446,7 @@ class QEMUMachine: self._qmp.cmd('quit') # May raise subprocess.TimeoutExpired - self._popen.wait(timeout=timeout) + self._subp.wait(timeout=timeout) def _do_shutdown(self, timeout: Optional[int], has_quit: bool = False) -> None: |