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svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r74907 | eric.smith | 2009-09-18 09:23:13 -0400 (Fri, 18 Sep 2009) | 1 line Issue #6882: Import uuid creates zombies processes. I used a slightly different patch than the one attached to the issue, to be consistent with the style in the rest of the module. ........
267 lines
8.6 KiB
Python
267 lines
8.6 KiB
Python
import sys, os
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# find_library(name) returns the pathname of a library, or None.
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if os.name == "nt":
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def _get_build_version():
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"""Return the version of MSVC that was used to build Python.
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For Python 2.3 and up, the version number is included in
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sys.version. For earlier versions, assume the compiler is MSVC 6.
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"""
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# This function was copied from Lib/distutils/msvccompiler.py
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prefix = "MSC v."
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i = sys.version.find(prefix)
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if i == -1:
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return 6
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i = i + len(prefix)
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s, rest = sys.version[i:].split(" ", 1)
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majorVersion = int(s[:-2]) - 6
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minorVersion = int(s[2:3]) / 10.0
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# I don't think paths are affected by minor version in version 6
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if majorVersion == 6:
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minorVersion = 0
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if majorVersion >= 6:
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return majorVersion + minorVersion
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# else we don't know what version of the compiler this is
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return None
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def find_msvcrt():
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"""Return the name of the VC runtime dll"""
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version = _get_build_version()
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if version is None:
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# better be safe than sorry
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return None
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if version <= 6:
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clibname = 'msvcrt'
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else:
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clibname = 'msvcr%d' % (version * 10)
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# If python was built with in debug mode
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import imp
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if imp.get_suffixes()[0][0] == '_d.pyd':
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clibname += 'd'
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return clibname+'.dll'
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def find_library(name):
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if name in ('c', 'm'):
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return find_msvcrt()
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# See MSDN for the REAL search order.
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for directory in os.environ['PATH'].split(os.pathsep):
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fname = os.path.join(directory, name)
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if os.path.isfile(fname):
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return fname
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if fname.lower().endswith(".dll"):
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continue
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fname = fname + ".dll"
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if os.path.isfile(fname):
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return fname
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return None
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if os.name == "ce":
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# search path according to MSDN:
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# - absolute path specified by filename
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# - The .exe launch directory
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# - the Windows directory
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# - ROM dll files (where are they?)
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# - OEM specified search path: HKLM\Loader\SystemPath
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def find_library(name):
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return name
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if os.name == "posix" and sys.platform == "darwin":
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from ctypes.macholib.dyld import dyld_find as _dyld_find
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def find_library(name):
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possible = ['lib%s.dylib' % name,
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'%s.dylib' % name,
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'%s.framework/%s' % (name, name)]
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for name in possible:
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try:
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return _dyld_find(name)
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except ValueError:
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continue
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return None
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elif os.name == "posix":
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# Andreas Degert's find functions, using gcc, /sbin/ldconfig, objdump
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import re, tempfile, errno
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def _findLib_gcc(name):
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expr = r'[^\(\)\s]*lib%s\.[^\(\)\s]*' % re.escape(name)
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fdout, ccout = tempfile.mkstemp()
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os.close(fdout)
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cmd = 'if type gcc >/dev/null 2>&1; then CC=gcc; elif type cc >/dev/null 2>&1; then CC=cc;else exit 10; fi;' \
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'$CC -Wl,-t -o ' + ccout + ' 2>&1 -l' + name
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try:
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f = os.popen(cmd)
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try:
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trace = f.read()
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finally:
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rv = f.close()
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finally:
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try:
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os.unlink(ccout)
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except OSError as e:
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if e.errno != errno.ENOENT:
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raise
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if rv == 10:
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raise OSError('gcc or cc command not found')
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res = re.search(expr, trace)
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if not res:
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return None
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return res.group(0)
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if sys.platform == "sunos5":
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# use /usr/ccs/bin/dump on solaris
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def _get_soname(f):
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if not f:
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return None
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cmd = "/usr/ccs/bin/dump -Lpv 2>/dev/null " + f
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f = os.popen(cmd)
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try:
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data = f.read()
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finally:
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f.close()
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res = re.search(r'\[.*\]\sSONAME\s+([^\s]+)', data)
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if not res:
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return None
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return res.group(1)
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else:
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def _get_soname(f):
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# assuming GNU binutils / ELF
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if not f:
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return None
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cmd = 'if ! type objdump >/dev/null 2>&1; then exit 10; fi;' \
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"objdump -p -j .dynamic 2>/dev/null " + f
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f = os.popen(cmd)
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dump = f.read()
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rv = f.close()
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if rv == 10:
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raise OSError('objdump command not found')
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f = os.popen(cmd)
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try:
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data = f.read()
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finally:
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f.close()
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res = re.search(r'\sSONAME\s+([^\s]+)', data)
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if not res:
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return None
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return res.group(1)
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if (sys.platform.startswith("freebsd")
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or sys.platform.startswith("openbsd")
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or sys.platform.startswith("dragonfly")):
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def _num_version(libname):
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# "libxyz.so.MAJOR.MINOR" => [ MAJOR, MINOR ]
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parts = libname.split(".")
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nums = []
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try:
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while parts:
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nums.insert(0, int(parts.pop()))
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except ValueError:
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pass
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return nums or [ sys.maxsize ]
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def find_library(name):
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ename = re.escape(name)
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expr = r':-l%s\.\S+ => \S*/(lib%s\.\S+)' % (ename, ename)
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f = os.popen('/sbin/ldconfig -r 2>/dev/null')
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try:
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data = f.read()
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finally:
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f.close()
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res = re.findall(expr, data)
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if not res:
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return _get_soname(_findLib_gcc(name))
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res.sort(key=_num_version)
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return res[-1]
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else:
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def _findLib_ldconfig(name):
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# XXX assuming GLIBC's ldconfig (with option -p)
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expr = r'/[^\(\)\s]*lib%s\.[^\(\)\s]*' % re.escape(name)
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f = os.popen('/sbin/ldconfig -p 2>/dev/null')
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try:
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data = f.read()
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finally:
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f.close()
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res = re.search(expr, data)
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if not res:
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# Hm, this works only for libs needed by the python executable.
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cmd = 'ldd %s 2>/dev/null' % sys.executable
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f = os.popen(cmd)
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try:
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data = f.read()
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finally:
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f.close()
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res = re.search(expr, data)
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if not res:
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return None
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return res.group(0)
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def _findSoname_ldconfig(name):
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import struct
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if struct.calcsize('l') == 4:
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machine = os.uname()[4] + '-32'
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else:
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machine = os.uname()[4] + '-64'
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mach_map = {
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'x86_64-64': 'libc6,x86-64',
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'ppc64-64': 'libc6,64bit',
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'sparc64-64': 'libc6,64bit',
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's390x-64': 'libc6,64bit',
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'ia64-64': 'libc6,IA-64',
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}
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abi_type = mach_map.get(machine, 'libc6')
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# XXX assuming GLIBC's ldconfig (with option -p)
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expr = r'(\S+)\s+\((%s(?:, OS ABI:[^\)]*)?)\)[^/]*(/[^\(\)\s]*lib%s\.[^\(\)\s]*)' \
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% (abi_type, re.escape(name))
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f = os.popen('/sbin/ldconfig -p 2>/dev/null')
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try:
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data = f.read()
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finally:
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f.close()
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res = re.search(expr, data)
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if not res:
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return None
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return res.group(1)
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def find_library(name):
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return _findSoname_ldconfig(name) or _get_soname(_findLib_gcc(name))
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################################################################
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# test code
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def test():
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from ctypes import cdll
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if os.name == "nt":
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print(cdll.msvcrt)
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print(cdll.load("msvcrt"))
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print(find_library("msvcrt"))
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if os.name == "posix":
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# find and load_version
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print(find_library("m"))
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print(find_library("c"))
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print(find_library("bz2"))
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# getattr
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## print cdll.m
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## print cdll.bz2
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# load
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if sys.platform == "darwin":
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print(cdll.LoadLibrary("libm.dylib"))
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print(cdll.LoadLibrary("libcrypto.dylib"))
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print(cdll.LoadLibrary("libSystem.dylib"))
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print(cdll.LoadLibrary("System.framework/System"))
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else:
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print(cdll.LoadLibrary("libm.so"))
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print(cdll.LoadLibrary("libcrypt.so"))
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print(find_library("crypt"))
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if __name__ == "__main__":
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test()
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