Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame^] | 1 | ###################################################################### |
| 2 | # This file should be kept compatible with Python 2.3, see PEP 291. # |
| 3 | ###################################################################### |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 4 | import sys, os |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 5 | |
| 6 | # find_library(name) returns the pathname of a library, or None. |
| 7 | if os.name == "nt": |
| 8 | def find_library(name): |
| 9 | # See MSDN for the REAL search order. |
| 10 | for directory in os.environ['PATH'].split(os.pathsep): |
| 11 | fname = os.path.join(directory, name) |
| 12 | if os.path.exists(fname): |
| 13 | return fname |
| 14 | if fname.lower().endswith(".dll"): |
| 15 | continue |
| 16 | fname = fname + ".dll" |
| 17 | if os.path.exists(fname): |
| 18 | return fname |
| 19 | return None |
| 20 | |
| 21 | if os.name == "ce": |
| 22 | # search path according to MSDN: |
| 23 | # - absolute path specified by filename |
| 24 | # - The .exe launch directory |
| 25 | # - the Windows directory |
| 26 | # - ROM dll files (where are they?) |
| 27 | # - OEM specified search path: HKLM\Loader\SystemPath |
| 28 | def find_library(name): |
| 29 | return name |
| 30 | |
| 31 | if os.name == "posix" and sys.platform == "darwin": |
| 32 | from ctypes.macholib.dyld import dyld_find as _dyld_find |
| 33 | def find_library(name): |
| 34 | possible = ['lib%s.dylib' % name, |
| 35 | '%s.dylib' % name, |
| 36 | '%s.framework/%s' % (name, name)] |
| 37 | for name in possible: |
| 38 | try: |
| 39 | return _dyld_find(name) |
| 40 | except ValueError: |
| 41 | continue |
| 42 | return None |
| 43 | |
| 44 | elif os.name == "posix": |
| 45 | # Andreas Degert's find functions, using gcc, /sbin/ldconfig, objdump |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame^] | 46 | import re, tempfile, errno |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 47 | |
| 48 | def _findLib_gcc(name): |
| 49 | expr = '[^\(\)\s]*lib%s\.[^\(\)\s]*' % name |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame^] | 50 | fdout, ccout = tempfile.mkstemp() |
| 51 | os.close(fdout) |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 52 | cmd = 'if type gcc &>/dev/null; then CC=gcc; else CC=cc; fi;' \ |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame^] | 53 | '$CC -Wl,-t -o ' + ccout + ' 2>&1 -l' + name |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 54 | try: |
| 55 | fdout, outfile = tempfile.mkstemp() |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame^] | 56 | os.close(fdout) |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 57 | fd = os.popen(cmd) |
| 58 | trace = fd.read() |
| 59 | err = fd.close() |
| 60 | finally: |
| 61 | try: |
| 62 | os.unlink(outfile) |
| 63 | except OSError, e: |
| 64 | if e.errno != errno.ENOENT: |
| 65 | raise |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame^] | 66 | try: |
| 67 | os.unlink(ccout) |
| 68 | except OSError, e: |
| 69 | if e.errno != errno.ENOENT: |
| 70 | raise |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 71 | res = re.search(expr, trace) |
| 72 | if not res: |
| 73 | return None |
| 74 | return res.group(0) |
| 75 | |
| 76 | def _findLib_ld(name): |
| 77 | expr = '/[^\(\)\s]*lib%s\.[^\(\)\s]*' % name |
| 78 | res = re.search(expr, os.popen('/sbin/ldconfig -p 2>/dev/null').read()) |
| 79 | if not res: |
| 80 | # Hm, this works only for libs needed by the python executable. |
| 81 | cmd = 'ldd %s 2>/dev/null' % sys.executable |
| 82 | res = re.search(expr, os.popen(cmd).read()) |
| 83 | if not res: |
| 84 | return None |
| 85 | return res.group(0) |
| 86 | |
| 87 | def _get_soname(f): |
| 88 | cmd = "objdump -p -j .dynamic 2>/dev/null " + f |
| 89 | res = re.search(r'\sSONAME\s+([^\s]+)', os.popen(cmd).read()) |
| 90 | if not res: |
| 91 | return None |
| 92 | return res.group(1) |
| 93 | |
| 94 | def find_library(name): |
| 95 | lib = _findLib_ld(name) or _findLib_gcc(name) |
| 96 | if not lib: |
| 97 | return None |
| 98 | return _get_soname(lib) |
| 99 | |
| 100 | ################################################################ |
| 101 | # test code |
| 102 | |
| 103 | def test(): |
| 104 | from ctypes import cdll |
| 105 | if os.name == "nt": |
| 106 | print cdll.msvcrt |
| 107 | print cdll.load("msvcrt") |
| 108 | print find_library("msvcrt") |
| 109 | |
| 110 | if os.name == "posix": |
| 111 | # find and load_version |
| 112 | print find_library("m") |
| 113 | print find_library("c") |
| 114 | print find_library("bz2") |
| 115 | |
| 116 | # getattr |
| 117 | ## print cdll.m |
| 118 | ## print cdll.bz2 |
| 119 | |
| 120 | # load |
| 121 | if sys.platform == "darwin": |
| 122 | print cdll.LoadLibrary("libm.dylib") |
| 123 | print cdll.LoadLibrary("libcrypto.dylib") |
| 124 | print cdll.LoadLibrary("libSystem.dylib") |
| 125 | print cdll.LoadLibrary("System.framework/System") |
| 126 | else: |
| 127 | print cdll.LoadLibrary("libm.so") |
| 128 | print cdll.LoadLibrary("libcrypt.so") |
| 129 | print find_library("crypt") |
| 130 | |
| 131 | if __name__ == "__main__": |
| 132 | test() |