name : util.py.binutils-no-dep import os import subprocess import sys # find_library(name) returns the pathname of a library, or None. if os.name == "nt": def _get_build_version(): """Return the version of MSVC that was used to build Python. For Python 2.3 and up, the version number is included in sys.version. For earlier versions, assume the compiler is MSVC 6. """ # This function was copied from Lib/distutils/msvccompiler.py prefix = "MSC v." i = sys.version.find(prefix) if i == -1: return 6 i = i + len(prefix) s, rest = sys.version[i:].split(" ", 1) majorVersion = int(s[:-2]) - 6 minorVersion = int(s[2:3]) / 10.0 # I don't think paths are affected by minor version in version 6 if majorVersion == 6: minorVersion = 0 if majorVersion >= 6: return majorVersion + minorVersion # else we don't know what version of the compiler this is return None def find_msvcrt(): """Return the name of the VC runtime dll""" version = _get_build_version() if version is None: # better be safe than sorry return None if version <= 6: clibname = 'msvcrt' else: clibname = 'msvcr%d' % (version * 10) # If python was built with in debug mode import imp if imp.get_suffixes()[0][0] == '_d.pyd': clibname += 'd' return clibname+'.dll' def find_library(name): if name in ('c', 'm'): return find_msvcrt() # See MSDN for the REAL search order. for directory in os.environ['PATH'].split(os.pathsep): fname = os.path.join(directory, name) if os.path.isfile(fname): return fname if fname.lower().endswith(".dll"): continue fname = fname + ".dll" if os.path.isfile(fname): return fname return None if os.name == "ce": # search path according to MSDN: # - absolute path specified by filename # - The .exe launch directory # - the Windows directory # - ROM dll files (where are they?) # - OEM specified search path: HKLM\Loader\SystemPath def find_library(name): return name if os.name == "posix" and sys.platform == "darwin": from ctypes.macholib.dyld import dyld_find as _dyld_find def find_library(name): possible = ['lib%s.dylib' % name, '%s.dylib' % name, '%s.framework/%s' % (name, name)] for name in possible: try: return _dyld_find(name) except ValueError: continue return None elif os.name == "posix": # Andreas Degert's find functions, using gcc, /sbin/ldconfig, objdump import re, tempfile, errno 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 = r'[^\(\)\s]*lib%s\.[^\(\)\s]*' % re.escape(name) cmd = 'if type gcc >/dev/null 2>&1; then CC=gcc; elif type cc >/dev/null 2>&1; then CC=cc;else exit; fi;' \ 'LANG=C LC_ALL=C $CC -Wl,-t -o "$2" 2>&1 -l"$1"' temp = tempfile.NamedTemporaryFile() try: proc = subprocess.Popen((cmd, '_findLib_gcc', name, temp.name), shell=True, stdout=subprocess.PIPE) [trace, _] = proc.communicate() finally: try: temp.close() except OSError, e: # ENOENT is raised if the file was already removed, which is # the normal behaviour of GCC if linking fails if e.errno != errno.ENOENT: raise res = re.search(expr, trace) if not res: return None return res.group(0) if sys.platform == "sunos5": # use /usr/ccs/bin/dump on solaris def _get_soname(f): if not f: return None null = open(os.devnull, "wb") try: with null: proc = subprocess.Popen(("/usr/ccs/bin/dump", "-Lpv", f), stdout=subprocess.PIPE, stderr=null) except OSError: # E.g. command not found return None [data, _] = proc.communicate() res = re.search(br'\[.*\]\sSONAME\s+([^\s]+)', data) if not res: return None return res.group(1) else: def _get_soname(f): # assuming GNU binutils / ELF if not f: return None cmd = 'if ! type objdump >/dev/null 2>&1; then exit; fi;' \ 'objdump -p -j .dynamic 2>/dev/null "$1"' proc = subprocess.Popen((cmd, '_get_soname', f), shell=True, stdout=subprocess.PIPE) [dump, _] = proc.communicate() res = re.search(br'\sSONAME\s+([^\s]+)', dump) if not res: return None return res.group(1) if (sys.platform.startswith("freebsd") or sys.platform.startswith("openbsd") or sys.platform.startswith("dragonfly")): def _num_version(libname): # "libxyz.so.MAJOR.MINOR" => [ MAJOR, MINOR ] parts = libname.split(b".") nums = [] try: while parts: nums.insert(0, int(parts.pop())) except ValueError: pass return nums or [sys.maxint] def find_library(name): ename = re.escape(name) expr = r':-l%s\.\S+ => \S*/(lib%s\.\S+)' % (ename, ename) null = open(os.devnull, 'wb') try: with null: proc = subprocess.Popen(('/sbin/ldconfig', '-r'), stdout=subprocess.PIPE, stderr=null) except OSError: # E.g. command not found data = b'' else: [data, _] = proc.communicate() res = re.findall(expr, data) if not res: return _get_soname(_findLib_gcc(name)) res.sort(key=_num_version) return res[-1] elif sys.platform == "sunos5": def _findLib_crle(name, is64): if not os.path.exists('/usr/bin/crle'): return None env = dict(os.environ) env['LC_ALL'] = 'C' if is64: args = ('/usr/bin/crle', '-64') else: args = ('/usr/bin/crle',) paths = None null = open(os.devnull, 'wb') try: with null: proc = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=null, env=env) except OSError: # E.g. bad executable return None try: for line in proc.stdout: line = line.strip() if line.startswith(b'Default Library Path (ELF):'): paths = line.split()[4] finally: proc.stdout.close() proc.wait() if not paths: return None for dir in paths.split(":"): libfile = os.path.join(dir, "lib%s.so" % name) if os.path.exists(libfile): return libfile return None def find_library(name, is64 = False): return _get_soname(_findLib_crle(name, is64) or _findLib_gcc(name)) else: def _findSoname_ldconfig(name): import struct if struct.calcsize('l') == 4: machine = os.uname()[4] + '-32' else: machine = os.uname()[4] + '-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) expr = r'\s+(lib%s\.[^\s]+)\s+\(%s' % (re.escape(name), abi_type) env = dict(os.environ) env['LC_ALL'] = 'C' env['LANG'] = 'C' null = open(os.devnull, 'wb') try: with null: p = subprocess.Popen(['/sbin/ldconfig', '-p'], stderr=null, stdout=subprocess.PIPE, env=env) except OSError: # E.g. command not found return None [data, _] = p.communicate() res = re.search(expr, data) if not res: return None return res.group(1) def find_library(name): return _findSoname_ldconfig(name) or _get_soname(_findLib_gcc(name)) ################################################################ # test code def test(): from ctypes import cdll if os.name == "nt": print cdll.msvcrt print cdll.load("msvcrt") print find_library("msvcrt") if os.name == "posix": # find and load_version print find_library("m") print find_library("c") print find_library("bz2") # getattr ## print cdll.m ## print cdll.bz2 # load if sys.platform == "darwin": print cdll.LoadLibrary("libm.dylib") print cdll.LoadLibrary("libcrypto.dylib") print cdll.LoadLibrary("libSystem.dylib") print cdll.LoadLibrary("System.framework/System") else: print cdll.LoadLibrary("libm.so") print cdll.LoadLibrary("libcrypt.so") print find_library("crypt") if __name__ == "__main__": test()