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diff --git a/bin/python/isc/utils.py.in b/bin/python/isc/utils.py.in
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+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# SPDX-License-Identifier: MPL-2.0
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, you can obtain one at https://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+
+import os
+
+# These routines permit platform-independent location of BIND 9 tools
+if os.name == "nt":
+ import win32con
+ import win32api
+
+
+def prefix(bindir=""):
+ if os.name != "nt":
+ return os.path.join("@prefix@", bindir)
+
+ hklm = win32con.HKEY_LOCAL_MACHINE
+ bind_subkey = "Software\\ISC\\BIND"
+ sam = win32con.KEY_READ
+ h_key = None
+ key_found = True
+ # can fail if the registry redirected for 32/64 bits
+ try:
+ h_key = win32api.RegOpenKeyEx(hklm, bind_subkey, 0, sam)
+ except:
+ key_found = False
+ # retry for 32 bit python with 64 bit bind9
+ if not key_found:
+ key_found = True
+ sam64 = sam | win32con.KEY_WOW64_64KEY
+ try:
+ h_key = win32api.RegOpenKeyEx(hklm, bind_subkey, 0, sam64)
+ except:
+ key_found = False
+ # retry 64 bit python with 32 bit bind9
+ if not key_found:
+ key_found = True
+ sam32 = sam | win32con.KEY_WOW64_32KEY
+ try:
+ h_key = win32api.RegOpenKeyEx(hklm, bind_subkey, 0, sam32)
+ except:
+ key_found = False
+ if key_found:
+ try:
+ (named_base, _) = win32api.RegQueryValueEx(h_key, "InstallDir")
+ except:
+ key_found = False
+ win32api.RegCloseKey(h_key)
+ if key_found:
+ return os.path.join(named_base, bindir)
+ return os.path.join(win32api.GetSystemDirectory(), bindir)
+
+
+def shellquote(s):
+ if os.name == "nt":
+ return '"' + s.replace('"', '"\\"') + '"'
+ return "'" + s.replace("'", "'\\''") + "'"
+
+
+version = "@BIND9_VERSION@"
+if os.name != "nt":
+ sysconfdir = "@expanded_sysconfdir@"
+else:
+ sysconfdir = prefix("etc")