diff options
Diffstat (limited to 'Lib/posixpath.py')
| -rw-r--r-- | Lib/posixpath.py | 57 |
1 files changed, 33 insertions, 24 deletions
diff --git a/Lib/posixpath.py b/Lib/posixpath.py index db72ded8826..d38f3bd5872 100644 --- a/Lib/posixpath.py +++ b/Lib/posixpath.py @@ -36,7 +36,7 @@ __all__ = ["normcase","isabs","join","splitdrive","splitroot","split","splitext" "samefile","sameopenfile","samestat", "curdir","pardir","sep","pathsep","defpath","altsep","extsep", "devnull","realpath","supports_unicode_filenames","relpath", - "commonpath", "isjunction","isdevdrive"] + "commonpath", "isjunction","isdevdrive","ALLOW_MISSING"] def _get_sep(path): @@ -402,10 +402,18 @@ symbolic links encountered in the path.""" curdir = '.' pardir = '..' getcwd = os.getcwd - return _realpath(filename, strict, sep, curdir, pardir, getcwd) + if strict is ALLOW_MISSING: + ignored_error = FileNotFoundError + strict = True + elif strict: + ignored_error = () + else: + ignored_error = OSError + + lstat = os.lstat + readlink = os.readlink + maxlinks = None -def _realpath(filename, strict=False, sep=sep, curdir=curdir, pardir=pardir, - getcwd=os.getcwd, lstat=os.lstat, readlink=os.readlink, maxlinks=None): # The stack of unresolved path parts. When popped, a special value of None # indicates that a symlink target has been resolved, and that the original # symlink path can be retrieved by popping again. The [::-1] slice is a @@ -477,27 +485,28 @@ def _realpath(filename, strict=False, sep=sep, curdir=curdir, pardir=pardir, path = newpath continue target = readlink(newpath) - except OSError: - if strict: - raise - path = newpath + except ignored_error: + pass + else: + # Resolve the symbolic link + if target.startswith(sep): + # Symlink target is absolute; reset resolved path. + path = sep + if maxlinks is None: + # Mark this symlink as seen but not fully resolved. + seen[newpath] = None + # Push the symlink path onto the stack, and signal its specialness + # by also pushing None. When these entries are popped, we'll + # record the fully-resolved symlink target in the 'seen' mapping. + rest.append(newpath) + rest.append(None) + # Push the unresolved symlink target parts onto the stack. + target_parts = target.split(sep)[::-1] + rest.extend(target_parts) + part_count += len(target_parts) continue - # Resolve the symbolic link - if target.startswith(sep): - # Symlink target is absolute; reset resolved path. - path = sep - if maxlinks is None: - # Mark this symlink as seen but not fully resolved. - seen[newpath] = None - # Push the symlink path onto the stack, and signal its specialness - # by also pushing None. When these entries are popped, we'll - # record the fully-resolved symlink target in the 'seen' mapping. - rest.append(newpath) - rest.append(None) - # Push the unresolved symlink target parts onto the stack. - target_parts = target.split(sep)[::-1] - rest.extend(target_parts) - part_count += len(target_parts) + # An error occurred and was ignored. + path = newpath return path |