r"""OS routines for Java, with some attempts to support DOS, NT, and Posix functionality. This exports: - all functions from posix, nt, dos, os2, mac, or ce, e.g. unlink, stat, etc. - os.path is one of the modules posixpath, ntpath, macpath, or dospath - os.name is 'posix', 'nt', 'dos', 'os2', 'mac', 'ce' or 'riscos' - os.curdir is a string representing the current directory ('.' or ':') - os.pardir is a string representing the parent directory ('..' or '::') - os.sep is the (or a most common) pathname separator ('/' or ':' or '\\') - os.altsep is the alternate pathname separator (None or '/') - os.pathsep is the component separator used in $PATH etc - os.linesep is the line separator in text files ('\r' or '\n' or '\r\n') - os.defpath is the default search path for executables Programs that import and use 'os' stand a better chance of being portable between different platforms. Of course, they must then only use functions that are defined by all platforms (e.g., unlink and opendir), and leave all pathname manipulation to os.path (e.g., split and join). """ __all__ = ["altsep", "curdir", "pardir", "sep", "pathsep", "linesep", "defpath", "name", "system", "environ", "putenv", "getenv", "popen", "popen2", "popen3", "popen4", "getlogin" ] import java from java.io import File import javapath as path from UserDict import UserDict class stat_result: import stat as _stat _stat_members = ( ('st_mode', _stat.ST_MODE), ('st_ino', _stat.ST_INO), ('st_dev', _stat.ST_DEV), ('st_nlink', _stat.ST_NLINK), ('st_uid', _stat.ST_UID), ('st_gid', _stat.ST_GID), ('st_size', _stat.ST_SIZE), ('st_atime', _stat.ST_ATIME), ('st_mtime', _stat.ST_MTIME), ('st_ctime', _stat.ST_CTIME), ) def __init__(self, results): if len(results) != 10: raise TypeError("stat_result() takes an at least 10-sequence") for (name, index) in stat_result._stat_members: self.__dict__[name] = results[index] def __getitem__(self, i): if i < 0 or i > 9: raise IndexError(i) return getattr(self, stat_result._stat_members[i][0]) def __setitem__(self, x, value): raise TypeError("object doesn't support item assignment") def __setattr__(self, name, value): if name in [x[0] for x in stat_result._stat_members]: raise TypeError(name) raise AttributeError("readonly attribute") def __len__(self): return 10 error = OSError name = 'java' # discriminate based on JDK version? curdir = '.' # default to Posix for directory behavior, override below pardir = '..' sep = File.separator altsep = None pathsep = File.pathSeparator defpath = '.' linesep = java.lang.System.getProperty('line.separator') if sep=='.': extsep = '/' else: extsep = '.' def _exit(n=0): java.lang.System.exit(n) def getcwd(): foo = File(File("foo").getAbsolutePath()) return foo.getParent() def chdir(path): raise OSError(0, 'chdir not supported in Java', path) def listdir(path): l = File(path).list() if l is None: raise OSError(0, 'No such directory', path) return list(l) def mkdir(path, mode='ignored'): if not File(path).mkdir(): raise OSError(0, "couldn't make directory", path) def makedirs(path, mode='ignored'): if not File(path).mkdirs(): raise OSError(0, "couldn't make directories", path) def remove(path): if not File(path).delete(): raise OSError(0, "couldn't delete file", path) def rename(path, newpath): if not File(path).renameTo(File(newpath)): raise OSError(0, "couldn't rename file", path) def rmdir(path): if not File(path).delete(): raise OSError(0, "couldn't delete directory", path) unlink = remove def stat(path): """The Java stat implementation only returns a small subset of the standard fields""" f = File(path) size = f.length() # Sadly, if the returned length is zero, we don't really know if the file # is zero sized or does not exist. if size == 0 and not f.exists(): raise OSError(0, 'No such file or directory', path) mtime = f.lastModified() / 1000.0 return stat_result((0, 0, 0, 0, 0, 0, size, mtime, mtime, 0)) def utime(path, times): # Only the modification time is changed (and only on java2). if times and hasattr(File, "setLastModified"): File(path).setLastModified(long(times[1] * 1000.0)) class LazyDict( UserDict ): """A lazy-populating User Dictionary. Lazy initialization is not thread-safe. """ def __init__( self, dict=None, populate=None, keyTransform=None ): """dict: starting dictionary of values populate: function that returns the populated dictionary keyTransform: function to normalize the keys (e.g., toupper/None) """ UserDict.__init__( self, dict ) self._populated = 0 self.__populateFunc = populate or (lambda: {}) self._keyTransform = keyTransform or (lambda key: key) def __populate( self ): if not self._populated: # race condition - test, populate, set # make sure you don't set _populated until __populateFunc completes... self.data = self.__populateFunc() self._populated = 1 ########## extend methods from UserDict by pre-populating def __repr__(self): self.__populate() return UserDict.__repr__( self ) def __cmp__(self, dict): self.__populate() return UserDict.__cmp__( self, dict ) def __len__(self): self.__populate() return UserDict.__len__( self ) def __getitem__(self, key): self.__populate() return UserDict.__getitem__( self, self._keyTransform(key) ) def __setitem__(self, key, item): self.__populate() UserDict.__setitem__( self, self._keyTransform(key), item ) def __delitem__(self, key): self.__populate() UserDict.__delitem__( self, self._keyTransform(key) ) def clear(self): self.__populate() UserDict.clear( self ) def copy(self): self.__populate() return UserDict.copy( self ) def keys(self): self.__populate() return UserDict.keys( self ) def items(self): self.__populate() return UserDict.items( self ) def values(self): self.__populate() return UserDict.values( self ) def has_key(self, key): self.__populate() return UserDict.has_key( self, self._keyTransform(key) ) def update(self, dict): self.__populate() UserDict.update( self, dict ) def get(self, key, failobj=None): self.__populate() return UserDict.get( self, self._keyTransform(key), failobj ) def setdefault(self, key, failobj=None): self.__populate() return UserDict.setdefault( self, self._keyTransform(key), failobj ) def popitem(self): self.__populate() return UserDict.popitem( self ) # Provide lazy environ, popen*, and system objects # Do these lazily, as most jython programs don't need them, # and they are very expensive to initialize def _getEnvironment(): import javashell return javashell._shellEnv.environment environ = LazyDict( populate=_getEnvironment ) putenv = environ.__setitem__ getenv = environ.__getitem__ def system( *args, **kwargs ): # allow lazy import of popen2 and javashell import popen2 return popen2.system( *args, **kwargs ) def popen( *args, **kwargs ): # allow lazy import of popen2 and javashell import popen2 return popen2.popen( *args, **kwargs ) # os module versions of the popen# methods have different return value # order than popen2 functions def popen2(cmd, mode="t", bufsize=-1): import popen2 stdout, stdin = popen2.popen2(cmd, bufsize) return stdin, stdout def popen3(cmd, mode="t", bufsize=-1): import popen2 stdout, stdin, stderr = popen2.popen3(cmd, bufsize) return stdin, stdout, stderr def popen4(cmd, mode="t", bufsize=-1): import popen2 stdout, stdin = popen2.popen4(cmd, bufsize) return stdin, stdout def getlogin(): return java.lang.System.getProperty("user.name")