''' Copyright (c) 1999 John Aycock Copyright (c) 2000 by hartmut Goebel Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. See the file 'CHANGES' for a list of changes NB. This is not a masterpiece of software, but became more like a hack. Probably a complete rewrite would be sensefull. hG/2000-12-27 ''' import sys, types, os import walker, verify, magics import disas as dis import marshal sys.setrecursionlimit(5000) __all__ = ['uncompyle_file', 'main'] def _load_file(filename): ''' load a Python source file and compile it to byte-code _load_module(filename: string): code_object filename: name of file containing Python source code (normally a .py) code_object: code_object compiled from this source code This function does NOT write any file! ''' fp = open(filename, 'rb') source = fp.read()+'\n' try: co = compile(source, filename, 'exec') except SyntaxError: print >> sys.stderr, '>>Syntax error in', filename, '\n' raise fp.close() return co def _load_module(filename): ''' load a module without importing it _load_module(filename: string): code_object filename: name of file containing Python byte-code object (normally a .pyc) code_object: code_object from this file ''' fp = open(filename, 'rb') magic = fp.read(4) try: version = float(magics.versions[magic]) except KeyError: raise ImportError, "Unknown magic number %s in %s" % (ord(magic[0])+256*ord(magic[1]), filename) if (version > 2.7) or (version < 2.5): raise ImportError, "This is a Python %s file! Only Python 2.5 to 2.7 files are supported." % version #print version fp.read(4) # timestamp co = marshal.load(fp) #dis.marshalLoad(fp) fp.close() return version, co def uncompyle(version, co, out=None, showasm=0, showast=0): ''' diassembles a given code block 'co' ''' assert type(co) == types.CodeType # store final output stream for case of error __real_out = out or sys.stdout if co.co_filename: print >>__real_out, '# Embedded file name: %s' % co.co_filename # diff scanner if version == 2.7: import scanner27 as scan scanner = scan.Scanner27() elif version == 2.6: import scanner26 as scan scanner = scan.Scanner26() elif version == 2.5: import scanner25 as scan scanner = scan.Scanner25() scanner.setShowAsm(showasm, out) tokens, customize = scanner.disassemble(co) # Build AST from disassembly. walk = walker.Walker(out, scanner, showast=showast) try: ast = walk.build_ast(tokens, customize) except walker.ParserError, e : # parser failed, dump disassembly print >>__real_out, e raise del tokens # save memory # convert leading '__doc__ = "..." into doc string assert ast == 'stmts' try: if ast[0][0] == walker.ASSIGN_DOC_STRING(co.co_consts[0]): walk.print_docstring('', co.co_consts[0]) del ast[0] if ast[-1] == walker.RETURN_NONE: ast.pop() # remove last node #todo: if empty, add 'pass' except: pass walk.mod_globs = walker.find_globals(ast, set()) walk.gen_source(ast, customize) for g in walk.mod_globs: walk.write('global %s ## Warning: Unused global' % g) if walk.ERROR: raise walk.ERROR def uncompyle_file(filename, outstream=None, showasm=0, showast=0): """ decompile Python byte-code file (.pyc) """ version, co = _load_module(filename) if type(co) == list: for con in co: uncompyle(version, con, outstream, showasm, showast) else: uncompyle(version, co, outstream, showasm, showast) co = None # ---- main ---- if sys.platform.startswith('linux') and os.uname()[2][:2] == '2.': def __memUsage(): mi = open('/proc/self/stat', 'r') mu = mi.readline().split()[22] mi.close() return int(mu) / 1000000 else: def __memUsage(): return '' def main(in_base, out_base, files, codes, outfile=None, showasm=0, showast=0, do_verify=0): ''' in_base base directory for input files out_base base directory for output files (ignored when files list of filenames to be uncompyled (relative to src_base) outfile write output to this filename (overwrites out_base) For redirecting output to - outfile= (out_base is ignored) - files below out_base out_base=... - stdout out_base=None, outfile=None ''' def _get_outstream(outfile): dir = os.path.dirname(outfile) failed_file = outfile + '_failed' if os.path.exists(failed_file): os.remove(failed_file) try: os.makedirs(dir) except OSError: pass return open(outfile, 'w') of = outfile tot_files = okay_files = failed_files = verify_failed_files = 0 #for code in codes: # version = sys.version[:3] # "2.5" # with open(code, "r") as f: # co = compile(f.read(), "", "exec") # uncompyle(sys.version[:3], co, sys.stdout, showasm=showasm, showast=showast) for file in files: infile = os.path.join(in_base, file) #print >>sys.stderr, infile if of: # outfile was given as parameter outstream = _get_outstream(outfile) elif out_base is None: outstream = sys.stdout else: outfile = os.path.join(out_base, file) + '_dis' outstream = _get_outstream(outfile) #print >>sys.stderr, outfile # try to decomyple the input file try: uncompyle_file(infile, outstream, showasm, showast) tot_files += 1 except KeyboardInterrupt: if outfile: outstream.close() os.remove(outfile) sys.stderr.write("\nLast file: %s " % (infile)) raise except: failed_files += 1 if outfile: outstream.close() os.rename(outfile, outfile + '_failed') else: sys.stderr.write("\n# Can't uncompyle %s\n" % infile) import traceback traceback.print_exc() else: # uncompyle successfull if outfile: outstream.close() if do_verify: try: verify.compare_code_with_srcfile(infile, outfile) if not outfile: print '\n# okay decompyling', infile, __memUsage() okay_files += 1 except verify.VerifyCmpError, e: verify_failed_files += 1 os.rename(outfile, outfile + '_unverified') if not outfile: print >>sys.stderr, "### Error Verifiying", file print >>sys.stderr, e else: okay_files += 1 if not outfile: print '\n# okay decompyling', infile, __memUsage() if outfile: sys.stdout.write("decompiled %i files: %i okay, %i failed, %i verify failed\r" % (tot_files, okay_files, failed_files, verify_failed_files)) sys.stdout.flush() if outfile: sys.stdout.write("\n") sys.stdout.flush() return (tot_files, okay_files, failed_files, verify_failed_files)