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[Qemu-devel] [PATCH v7 08/11] qemu.py: make sure we only remove files we
From: |
Amador Pahim |
Subject: |
[Qemu-devel] [PATCH v7 08/11] qemu.py: make sure we only remove files we create |
Date: |
Fri, 18 Aug 2017 19:05:23 +0200 |
To launch a VM, we need to create basically two files: the monitor
socket (if it's a UNIX socket) and the qemu log file.
For the qemu log file, we currently just open the path, which will
create the file if it does not exist or overwrite the file if it does
exist.
For the monitor socket, if it already exists, we are currently removing
it, even if it's not created by us.
This patch moves to pre_launch() the responsibility to make sure we only
create files that are not pre-existent and to populate a list of
controlled files. This list will then be used as the reference of
files to remove during the cleanup (post_shutdown()).
Signed-off-by: Amador Pahim <address@hidden>
---
scripts/qemu.py | 33 ++++++++++++++++++++++++++-------
1 file changed, 26 insertions(+), 7 deletions(-)
diff --git a/scripts/qemu.py b/scripts/qemu.py
index 29fd2469f9..9ae65e454e 100644
--- a/scripts/qemu.py
+++ b/scripts/qemu.py
@@ -41,6 +41,7 @@ class QEMUMachine(object):
monitor_address = os.path.join(test_dir, name + "-monitor.sock")
self._monitor_address = monitor_address
self._qemu_log_path = os.path.join(test_dir, name + ".log")
+ self._qemu_log_fd = None
self._popen = None
self._binary = binary
self._args = list(args) # Force copy args in case we modify them
@@ -50,6 +51,7 @@ class QEMUMachine(object):
self._socket_scm_helper = socket_scm_helper
self._debug = debug
self._qemu_full_args = None
+ self._created_files = []
# This can be used to add an unused monitor instance.
def add_monitor_telnet(self, ip, port):
@@ -134,30 +136,47 @@ class QEMUMachine(object):
'-display', 'none', '-vga', 'none']
def _pre_launch(self):
- self._qmp = qmp.qmp.QEMUMonitorProtocol(self._monitor_address,
server=True,
- debug=self._debug)
+ try:
+ self._qmp = qmp.qmp.QEMUMonitorProtocol(self._monitor_address,
+ server=True,
+ debug=self._debug)
+ except:
+ raise
+ else:
+ if not isinstance(self._monitor_address, tuple):
+ self._created_files.append(self._monitor_address)
+
+ try:
+ flags = os.O_CREAT | os.O_EXCL | os.O_WRONLY
+ os.open(self._qemu_log_path, flags)
+ except:
+ raise
+ else:
+ self._created_files.append(self._qemu_log_path)
+ self._qemu_log_fd = open(self._qemu_log_path, 'wb')
def _post_launch(self):
self._qmp.accept()
def _post_shutdown(self):
- if not isinstance(self._monitor_address, tuple):
- self._remove_if_exists(self._monitor_address)
- self._remove_if_exists(self._qemu_log_path)
+ if self._qemu_log_fd is not None:
+ self._qemu_log_fd.close()
+
+ while self._created_files:
+ self._remove_if_exists(self._created_files.pop())
def launch(self):
'''Launch the VM and establish a QMP connection'''
self._iolog = None
self._qemu_full_args = None
devnull = open(os.path.devnull, 'rb')
- qemulog = open(self._qemu_log_path, 'wb')
try:
self._pre_launch()
self._qemu_full_args = (self._wrapper + [self._binary] +
self._base_args() + self._args)
self._popen = subprocess.Popen(self._qemu_full_args,
stdin=devnull,
- stdout=qemulog,
+ stdout=self._qemu_log_fd,
stderr=subprocess.STDOUT,
shell=False)
self._post_launch()
--
2.13.5
- [Qemu-devel] [PATCH v7 06/11] qemu.py: improve message on negative exit code, (continued)
[Qemu-devel] [PATCH v7 05/11] qemu.py: cleanup redundant calls in launch(), Amador Pahim, 2017/08/18
[Qemu-devel] [PATCH v7 04/11] qemu.py: use poll() instead of 'returncode', Amador Pahim, 2017/08/18
[Qemu-devel] [PATCH v7 11/11] qemu.py: refactor launch(), Amador Pahim, 2017/08/18
[Qemu-devel] [PATCH v7 08/11] qemu.py: make sure we only remove files we create,
Amador Pahim <=
[Qemu-devel] [PATCH v7 09/11] qemu.py: launch vm only if it's not running, Amador Pahim, 2017/08/18
[Qemu-devel] [PATCH v7 01/11] qemu.py: fix is_running() return before first launch(), Amador Pahim, 2017/08/18
[Qemu-devel] [PATCH v7 03/11] qemu.py: use os.path.null instead of /dev/null, Amador Pahim, 2017/08/18
Re: [Qemu-devel] [PATCH v7 00/11] scripts/qemu.py fixes and cleanups, Eduardo Habkost, 2017/08/31