diff options
Diffstat (limited to 'Lib/os.py')
| -rw-r--r-- | Lib/os.py | 113 |
1 files changed, 35 insertions, 78 deletions
@@ -1,9 +1,9 @@ -r"""OS routines for Mac, NT, or Posix depending on what system we're on. +r"""OS routines for NT or Posix depending on what system we're on. This exports: - - all functions from posix, nt, os2, or ce, e.g. unlink, stat, etc. + - all functions from posix, nt or ce, e.g. unlink, stat, etc. - os.path is either posixpath or ntpath - - os.name is either 'posix', 'nt', 'os2' or 'ce'. + - os.name is either 'posix', 'nt' or 'ce'. - 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 '\\') @@ -81,30 +81,6 @@ elif 'nt' in _names: except ImportError: pass -elif 'os2' in _names: - name = 'os2' - linesep = '\r\n' - from os2 import * - try: - from os2 import _exit - __all__.append('_exit') - except ImportError: - pass - if sys.version.find('EMX GCC') == -1: - import ntpath as path - else: - import os2emxpath as path - from _emx_link import link - - import os2 - __all__.extend(_get_exports_list(os2)) - del os2 - - try: - from os2 import _have_functions - except ImportError: - pass - elif 'ce' in _names: name = 'ce' linesep = '\r\n' @@ -234,7 +210,7 @@ SEEK_END = 2 # (Inspired by Eric Raymond; the doc strings are mostly his) def makedirs(name, mode=0o777, exist_ok=False): - """makedirs(path [, mode=0o777][, exist_ok=False]) + """makedirs(name [, mode=0o777][, exist_ok=False]) Super-mkdir; create a leaf directory and all intermediate ones. Works like mkdir, except that any intermediate path segment (not just the rightmost) @@ -249,10 +225,9 @@ def makedirs(name, mode=0o777, exist_ok=False): if head and tail and not path.exists(head): try: makedirs(head, mode, exist_ok) - except OSError as e: + except FileExistsError: # be happy if someone already created the path - if e.errno != errno.EEXIST: - raise + pass cdir = curdir if isinstance(tail, bytes): cdir = bytes(curdir, 'ASCII') @@ -265,7 +240,7 @@ def makedirs(name, mode=0o777, exist_ok=False): raise def removedirs(name): - """removedirs(path) + """removedirs(name) Super-rmdir; remove a leaf directory and all empty intermediate ones. Works like rmdir except that, if the leaf directory is @@ -282,7 +257,7 @@ def removedirs(name): while head and tail: try: rmdir(head) - except error: + except OSError: break head, tail = path.split(head) @@ -309,7 +284,7 @@ def renames(old, new): if head and tail: try: removedirs(head) - except error: + except OSError: pass __all__.extend(["makedirs", "removedirs", "renames"]) @@ -337,15 +312,16 @@ def walk(top, topdown=True, onerror=None, followlinks=False): When topdown is true, the caller can modify the dirnames list in-place (e.g., via del or slice assignment), and walk will only recurse into the - subdirectories whose names remain in dirnames; this can be used to prune - the search, or to impose a specific order of visiting. Modifying - dirnames when topdown is false is ineffective, since the directories in - dirnames have already been generated by the time dirnames itself is - generated. + subdirectories whose names remain in dirnames; this can be used to prune the + search, or to impose a specific order of visiting. Modifying dirnames when + topdown is false is ineffective, since the directories in dirnames have + already been generated by the time dirnames itself is generated. No matter + the value of topdown, the list of subdirectories is retrieved before the + tuples for the directory and its subdirectories are generated. By default errors from the os.listdir() call are ignored. If optional arg 'onerror' is specified, it should be a function; it - will be called with one argument, an os.error instance. It can + will be called with one argument, an OSError instance. It can report the error to continue with the walk, or raise the exception to abort the walk. Note that the filename is available as the filename attribute of the exception object. @@ -369,6 +345,7 @@ def walk(top, topdown=True, onerror=None, followlinks=False): print("bytes in", len(files), "non-directory files") if 'CVS' in dirs: dirs.remove('CVS') # don't visit CVS directories + """ islink, join, isdir = path.islink, path.join, path.isdir @@ -379,10 +356,10 @@ def walk(top, topdown=True, onerror=None, followlinks=False): # minor reason when (say) a thousand readable directories are still # left to visit. That logic is copied here. try: - # Note that listdir and error are globals in this module due + # Note that listdir is global in this module due # to earlier import-*. names = listdir(top) - except error as err: + except OSError as err: if onerror is not None: onerror(err) return @@ -484,7 +461,7 @@ if {open, stat} <= supports_dir_fd and {listdir, stat} <= supports_fd: try: orig_st = stat(name, dir_fd=topfd, follow_symlinks=follow_symlinks) dirfd = open(name, O_RDONLY, dir_fd=topfd) - except error as err: + except OSError as err: if onerror is not None: onerror(err) return @@ -579,7 +556,7 @@ def _execvpe(file, args, env=None): fullname = path.join(dir, file) try: exec_func(fullname, *argrest) - except error as e: + except OSError as e: last_exc = e tb = sys.exc_info()[2] if (e.errno != errno.ENOENT and e.errno != errno.ENOTDIR @@ -636,7 +613,7 @@ def get_exec_path(env=None): # Change environ to automatically call putenv(), unsetenv if they exist. -from collections.abc import MutableMapping +from _collections_abc import MutableMapping class _Environ(MutableMapping): def __init__(self, data, encodekey, decodekey, encodevalue, decodevalue, putenv, unsetenv): @@ -696,17 +673,19 @@ try: except NameError: _putenv = lambda key, value: None else: - __all__.append("putenv") + if "putenv" not in __all__: + __all__.append("putenv") try: _unsetenv = unsetenv except NameError: _unsetenv = lambda key: _putenv(key, "") else: - __all__.append("unsetenv") + if "unsetenv" not in __all__: + __all__.append("unsetenv") def _createenviron(): - if name in ('os2', 'nt'): + if name == 'nt': # Where Env Var Names Must Be UPPERCASE def check_str(value): if not isinstance(value, str): @@ -746,7 +725,7 @@ def getenv(key, default=None): key, default and the result are str.""" return environ.get(key, default) -supports_bytes_environ = name not in ('os2', 'nt') +supports_bytes_environ = (name != 'nt') __all__.extend(("getenv", "supports_bytes_environ")) if supports_bytes_environ: @@ -845,7 +824,7 @@ if _exists("fork") and not _exists("spawnv") and _exists("execv"): elif WIFEXITED(sts): return WEXITSTATUS(sts) else: - raise error("Not stopped, signaled or exited???") + raise OSError("Not stopped, signaled or exited???") def spawnv(mode, file, args): """spawnv(mode, file, args) -> integer @@ -888,6 +867,10 @@ If mode == P_WAIT return the process's exit code if it exits normally; otherwise return -SIG, where SIG is the signal that killed it. """ return _spawnvef(mode, file, args, env, execvpe) + + __all__.extend(["spawnv", "spawnve", "spawnvp", "spawnvpe"]) + + if _exists("spawnv"): # These aren't supplied by the basic Windows code # but can be easily implemented in Python @@ -913,7 +896,7 @@ otherwise return -SIG, where SIG is the signal that killed it. """ return spawnve(mode, file, args[:-1], env) - __all__.extend(["spawnv", "spawnve", "spawnl", "spawnle",]) + __all__.extend(["spawnl", "spawnle"]) if _exists("spawnvp"): @@ -941,34 +924,8 @@ otherwise return -SIG, where SIG is the signal that killed it. """ return spawnvpe(mode, file, args[:-1], env) - __all__.extend(["spawnvp", "spawnvpe", "spawnlp", "spawnlpe",]) - -import copyreg as _copyreg - -def _make_stat_result(tup, dict): - return stat_result(tup, dict) + __all__.extend(["spawnlp", "spawnlpe"]) -def _pickle_stat_result(sr): - (type, args) = sr.__reduce__() - return (_make_stat_result, args) - -try: - _copyreg.pickle(stat_result, _pickle_stat_result, _make_stat_result) -except NameError: # stat_result may not exist - pass - -def _make_statvfs_result(tup, dict): - return statvfs_result(tup, dict) - -def _pickle_statvfs_result(sr): - (type, args) = sr.__reduce__() - return (_make_statvfs_result, args) - -try: - _copyreg.pickle(statvfs_result, _pickle_statvfs_result, - _make_statvfs_result) -except NameError: # statvfs_result may not exist - pass # Supply os.popen() def popen(cmd, mode="r", buffering=-1): |