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From f0ed87f4066296b7aa3c095d04672c138506fa45 Mon Sep 17 00:00:00 2001
From: Frederik Rietdijk <fridh@fridh.nl>
Date: Sat, 29 Jul 2017 20:33:56 +0200
Subject: [PATCH] Don't use ldconfig and speed up uuid load
---
Lib/ctypes/util.py | 70 ++----------------------------------------------------
Lib/uuid.py | 52 ----------------------------------------
2 files changed, 2 insertions(+), 120 deletions(-)
diff --git a/Lib/ctypes/util.py b/Lib/ctypes/util.py
index 7684eab81d..e9957d7951 100644
--- a/Lib/ctypes/util.py
+++ b/Lib/ctypes/util.py
@@ -95,46 +95,7 @@ elif os.name == "posix":
import re, tempfile
def _findLib_gcc(name):
- # Run GCC's linker with the -t (aka --trace) option and examine the
- # library name it prints out. The GCC command will fail because we
- # haven't supplied a proper program with main(), but that does not
- # matter.
- expr = os.fsencode(r'[^\(\)\s]*lib%s\.[^\(\)\s]*' % re.escape(name))
-
- c_compiler = shutil.which('gcc')
- if not c_compiler:
- c_compiler = shutil.which('cc')
- if not c_compiler:
- # No C compiler available, give up
- return None
-
- temp = tempfile.NamedTemporaryFile()
- try:
- args = [c_compiler, '-Wl,-t', '-o', temp.name, '-l' + name]
-
- env = dict(os.environ)
- env['LC_ALL'] = 'C'
- env['LANG'] = 'C'
- try:
- proc = subprocess.Popen(args,
- stdout=subprocess.PIPE,
- stderr=subprocess.STDOUT,
- env=env)
- except OSError: # E.g. bad executable
- return None
- with proc:
- trace = proc.stdout.read()
- finally:
- try:
- temp.close()
- except FileNotFoundError:
- # Raised if the file was already removed, which is the normal
- # behaviour of GCC if linking fails
- pass
- res = re.search(expr, trace)
- if not res:
- return None
- return os.fsdecode(res.group(0))
+ return None
if sys.platform == "sunos5":
@@ -256,34 +217,7 @@ elif os.name == "posix":
else:
def _findSoname_ldconfig(name):
- import struct
- if struct.calcsize('l') == 4:
- machine = os.uname().machine + '-32'
- else:
- machine = os.uname().machine + '-64'
- mach_map = {
- 'x86_64-64': 'libc6,x86-64',
- 'ppc64-64': 'libc6,64bit',
- 'sparc64-64': 'libc6,64bit',
- 's390x-64': 'libc6,64bit',
- 'ia64-64': 'libc6,IA-64',
- }
- abi_type = mach_map.get(machine, 'libc6')
-
- # XXX assuming GLIBC's ldconfig (with option -p)
- regex = os.fsencode(
- '\s+(lib%s\.[^\s]+)\s+\(%s' % (re.escape(name), abi_type))
- try:
- with subprocess.Popen(['/sbin/ldconfig', '-p'],
- stdin=subprocess.DEVNULL,
- stderr=subprocess.DEVNULL,
- stdout=subprocess.PIPE,
- env={'LC_ALL': 'C', 'LANG': 'C'}) as p:
- res = re.search(regex, p.stdout.read())
- if res:
- return os.fsdecode(res.group(1))
- except OSError:
- pass
+ return None
def find_library(name):
return _findSoname_ldconfig(name) or _get_soname(_findLib_gcc(name))
diff --git a/Lib/uuid.py b/Lib/uuid.py
index e96e7e034c..a099ab4b4a 100644
--- a/Lib/uuid.py
+++ b/Lib/uuid.py
@@ -455,58 +455,6 @@ def _netbios_getnode():
continue
return int.from_bytes(bytes, 'big')
-# Thanks to Thomas Heller for ctypes and for his help with its use here.
-
-# If ctypes is available, use it to find system routines for UUID generation.
-# XXX This makes the module non-thread-safe!
-_uuid_generate_time = _UuidCreate = None
-try:
- import ctypes, ctypes.util
- import sys
-
- # The uuid_generate_* routines are provided by libuuid on at least
- # Linux and FreeBSD, and provided by libc on Mac OS X.
- _libnames = ['uuid']
- if not sys.platform.startswith('win'):
- _libnames.append('c')
- for libname in _libnames:
- try:
- lib = ctypes.CDLL(ctypes.util.find_library(libname))
- except Exception:
- continue
- if hasattr(lib, 'uuid_generate_time'):
- _uuid_generate_time = lib.uuid_generate_time
- break
- del _libnames
-
- # The uuid_generate_* functions are broken on MacOS X 10.5, as noted
- # in issue #8621 the function generates the same sequence of values
- # in the parent process and all children created using fork (unless
- # those children use exec as well).
- #
- # Assume that the uuid_generate functions are broken from 10.5 onward,
- # the test can be adjusted when a later version is fixed.
- if sys.platform == 'darwin':
- import os
- if int(os.uname().release.split('.')[0]) >= 9:
- _uuid_generate_time = None
-
- # On Windows prior to 2000, UuidCreate gives a UUID containing the
- # hardware address. On Windows 2000 and later, UuidCreate makes a
- # random UUID and UuidCreateSequential gives a UUID containing the
- # hardware address. These routines are provided by the RPC runtime.
- # NOTE: at least on Tim's WinXP Pro SP2 desktop box, while the last
- # 6 bytes returned by UuidCreateSequential are fixed, they don't appear
- # to bear any relationship to the MAC address of any network device
- # on the box.
- try:
- lib = ctypes.windll.rpcrt4
- except:
- lib = None
- _UuidCreate = getattr(lib, 'UuidCreateSequential',
- getattr(lib, 'UuidCreate', None))
-except:
- pass
def _unixdll_getnode():
"""Get the hardware address on Unix using ctypes."""
--
2.13.3
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