added v3

venv/lib/python3.11/site-packages/paramiko/win_openssh.py

@@ -0,0 +1,56 @@
+# Copyright (C) 2021 Lew Gordon <lew.gordon@genesys.com>
+# Copyright (C) 2022 Patrick Spendrin <ps_ml@gmx.de>
+#
+# This file is part of paramiko.
+#
+# Paramiko is free software; you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation; either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# Paramiko is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+
+import os.path
+import time
+
+PIPE_NAME = r"\\.\pipe\openssh-ssh-agent"
+
+
+def can_talk_to_agent():
+    # use os.listdir() instead of os.path.exists(), because os.path.exists()
+    # uses CreateFileW() API and the pipe cannot be reopen unless the server
+    # calls DisconnectNamedPipe().
+    dir_, name = os.path.split(PIPE_NAME)
+    name = name.lower()
+    return any(name == n.lower() for n in os.listdir(dir_))
+
+
+class OpenSSHAgentConnection:
+    def __init__(self):
+        while True:
+            try:
+                self._pipe = os.open(PIPE_NAME, os.O_RDWR | os.O_BINARY)
+            except OSError as e:
+                # retry when errno 22 which means that the server has not
+                # called DisconnectNamedPipe() yet.
+                if e.errno != 22:
+                    raise
+            else:
+                break
+            time.sleep(0.1)
+
+    def send(self, data):
+        return os.write(self._pipe, data)
+
+    def recv(self, n):
+        return os.read(self._pipe, n)
+
+    def close(self):
+        return os.close(self._pipe)