--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/posixpath.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,404 @@
+"""Common operations on Posix pathnames.
+
+Instead of importing this module directly, import os and refer to
+this module as os.path. The "os.path" name is an alias for this
+module on Posix systems; on other systems (e.g. Mac, Windows),
+os.path provides the same operations in a manner specific to that
+platform, and is an alias to another module (e.g. macpath, ntpath).
+
+Some of this can actually be useful on non-Posix systems too, e.g.
+for manipulation of the pathname component of URLs.
+"""
+
+import os
+import stat
+import genericpath
+import warnings
+from genericpath import *
+
+__all__ = ["normcase","isabs","join","splitdrive","split","splitext",
+ "basename","dirname","commonprefix","getsize","getmtime",
+ "getatime","getctime","islink","exists","lexists","isdir","isfile",
+ "ismount","walk","expanduser","expandvars","normpath","abspath",
+ "samefile","sameopenfile","samestat",
+ "curdir","pardir","sep","pathsep","defpath","altsep","extsep",
+ "devnull","realpath","supports_unicode_filenames","relpath"]
+
+# strings representing various path-related bits and pieces
+curdir = '.'
+pardir = '..'
+extsep = '.'
+sep = '/'
+pathsep = ':'
+defpath = ':/bin:/usr/bin'
+altsep = None
+devnull = '/dev/null'
+
+# Normalize the case of a pathname. Trivial in Posix, string.lower on Mac.
+# On MS-DOS this may also turn slashes into backslashes; however, other
+# normalizations (such as optimizing '../' away) are not allowed
+# (another function should be defined to do that).
+
+def normcase(s):
+ """Normalize case of pathname. Has no effect under Posix"""
+ return s
+
+
+# Return whether a path is absolute.
+# Trivial in Posix, harder on the Mac or MS-DOS.
+
+def isabs(s):
+ """Test whether a path is absolute"""
+ return s.startswith('/')
+
+
+# Join pathnames.
+# Ignore the previous parts if a part is absolute.
+# Insert a '/' unless the first part is empty or already ends in '/'.
+
+def join(a, *p):
+ """Join two or more pathname components, inserting '/' as needed.
+ If any component is an absolute path, all previous path components
+ will be discarded."""
+ path = a
+ for b in p:
+ if b.startswith('/'):
+ path = b
+ elif path == '' or path.endswith('/'):
+ path += b
+ else:
+ path += '/' + b
+ return path
+
+
+# Split a path in head (everything up to the last '/') and tail (the
+# rest). If the path ends in '/', tail will be empty. If there is no
+# '/' in the path, head will be empty.
+# Trailing '/'es are stripped from head unless it is the root.
+
+def split(p):
+ """Split a pathname. Returns tuple "(head, tail)" where "tail" is
+ everything after the final slash. Either part may be empty."""
+ i = p.rfind('/') + 1
+ head, tail = p[:i], p[i:]
+ if head and head != '/'*len(head):
+ head = head.rstrip('/')
+ return head, tail
+
+
+# Split a path in root and extension.
+# The extension is everything starting at the last dot in the last
+# pathname component; the root is everything before that.
+# It is always true that root + ext == p.
+
+def splitext(p):
+ return genericpath._splitext(p, sep, altsep, extsep)
+splitext.__doc__ = genericpath._splitext.__doc__
+
+# Split a pathname into a drive specification and the rest of the
+# path. Useful on DOS/Windows/NT; on Unix, the drive is always empty.
+
+def splitdrive(p):
+ """Split a pathname into drive and path. On Posix, drive is always
+ empty."""
+ return '', p
+
+
+# Return the tail (basename) part of a path, same as split(path)[1].
+
+def basename(p):
+ """Returns the final component of a pathname"""
+ i = p.rfind('/') + 1
+ return p[i:]
+
+
+# Return the head (dirname) part of a path, same as split(path)[0].
+
+def dirname(p):
+ """Returns the directory component of a pathname"""
+ i = p.rfind('/') + 1
+ head = p[:i]
+ if head and head != '/'*len(head):
+ head = head.rstrip('/')
+ return head
+
+
+# Is a path a symbolic link?
+# This will always return false on systems where os.lstat doesn't exist.
+
+def islink(path):
+ """Test whether a path is a symbolic link"""
+ try:
+ st = os.lstat(path)
+ except (os.error, AttributeError):
+ return False
+ return stat.S_ISLNK(st.st_mode)
+
+# Being true for dangling symbolic links is also useful.
+
+def lexists(path):
+ """Test whether a path exists. Returns True for broken symbolic links"""
+ try:
+ st = os.lstat(path)
+ except os.error:
+ return False
+ return True
+
+
+# Are two filenames really pointing to the same file?
+
+def samefile(f1, f2):
+ """Test whether two pathnames reference the same actual file"""
+ s1 = os.stat(f1)
+ s2 = os.stat(f2)
+ return samestat(s1, s2)
+
+
+# Are two open files really referencing the same file?
+# (Not necessarily the same file descriptor!)
+
+def sameopenfile(fp1, fp2):
+ """Test whether two open file objects reference the same file"""
+ s1 = os.fstat(fp1)
+ s2 = os.fstat(fp2)
+ return samestat(s1, s2)
+
+
+# Are two stat buffers (obtained from stat, fstat or lstat)
+# describing the same file?
+
+def samestat(s1, s2):
+ """Test whether two stat buffers reference the same file"""
+ return s1.st_ino == s2.st_ino and \
+ s1.st_dev == s2.st_dev
+
+
+# Is a path a mount point?
+# (Does this work for all UNIXes? Is it even guaranteed to work by Posix?)
+
+def ismount(path):
+ """Test whether a path is a mount point"""
+ try:
+ s1 = os.lstat(path)
+ s2 = os.lstat(join(path, '..'))
+ except os.error:
+ return False # It doesn't exist -- so not a mount point :-)
+ dev1 = s1.st_dev
+ dev2 = s2.st_dev
+ if dev1 != dev2:
+ return True # path/.. on a different device as path
+ ino1 = s1.st_ino
+ ino2 = s2.st_ino
+ if ino1 == ino2:
+ return True # path/.. is the same i-node as path
+ return False
+
+
+# Directory tree walk.
+# For each directory under top (including top itself, but excluding
+# '.' and '..'), func(arg, dirname, filenames) is called, where
+# dirname is the name of the directory and filenames is the list
+# of files (and subdirectories etc.) in the directory.
+# The func may modify the filenames list, to implement a filter,
+# or to impose a different order of visiting.
+
+def walk(top, func, arg):
+ """Directory tree walk with callback function.
+
+ For each directory in the directory tree rooted at top (including top
+ itself, but excluding '.' and '..'), call func(arg, dirname, fnames).
+ dirname is the name of the directory, and fnames a list of the names of
+ the files and subdirectories in dirname (excluding '.' and '..'). func
+ may modify the fnames list in-place (e.g. via del or slice assignment),
+ and walk will only recurse into the subdirectories whose names remain in
+ fnames; this can be used to implement a filter, or to impose a specific
+ order of visiting. No semantics are defined for, or required of, arg,
+ beyond that arg is always passed to func. It can be used, e.g., to pass
+ a filename pattern, or a mutable object designed to accumulate
+ statistics. Passing None for arg is common."""
+ warnings.warnpy3k("In 3.x, os.path.walk is removed in favor of os.walk.")
+ try:
+ names = os.listdir(top)
+ except os.error:
+ return
+ func(arg, top, names)
+ for name in names:
+ name = join(top, name)
+ try:
+ st = os.lstat(name)
+ except os.error:
+ continue
+ if stat.S_ISDIR(st.st_mode):
+ walk(name, func, arg)
+
+
+# Expand paths beginning with '~' or '~user'.
+# '~' means $HOME; '~user' means that user's home directory.
+# If the path doesn't begin with '~', or if the user or $HOME is unknown,
+# the path is returned unchanged (leaving error reporting to whatever
+# function is called with the expanded path as argument).
+# See also module 'glob' for expansion of *, ? and [...] in pathnames.
+# (A function should also be defined to do full *sh-style environment
+# variable expansion.)
+
+def expanduser(path):
+ """Expand ~ and ~user constructions. If user or $HOME is unknown,
+ do nothing."""
+ if not path.startswith('~'):
+ return path
+ i = path.find('/', 1)
+ if i < 0:
+ i = len(path)
+ if i == 1:
+ if 'HOME' not in os.environ:
+ import pwd
+ userhome = pwd.getpwuid(os.getuid()).pw_dir
+ else:
+ userhome = os.environ['HOME']
+ else:
+ import pwd
+ try:
+ pwent = pwd.getpwnam(path[1:i])
+ except KeyError:
+ return path
+ userhome = pwent.pw_dir
+ userhome = userhome.rstrip('/')
+ return userhome + path[i:]
+
+
+# Expand paths containing shell variable substitutions.
+# This expands the forms $variable and ${variable} only.
+# Non-existent variables are left unchanged.
+
+_varprog = None
+
+def expandvars(path):
+ """Expand shell variables of form $var and ${var}. Unknown variables
+ are left unchanged."""
+ global _varprog
+ if '$' not in path:
+ return path
+ if not _varprog:
+ import re
+ _varprog = re.compile(r'\$(\w+|\{[^}]*\})')
+ i = 0
+ while True:
+ m = _varprog.search(path, i)
+ if not m:
+ break
+ i, j = m.span(0)
+ name = m.group(1)
+ if name.startswith('{') and name.endswith('}'):
+ name = name[1:-1]
+ if name in os.environ:
+ tail = path[j:]
+ path = path[:i] + os.environ[name]
+ i = len(path)
+ path += tail
+ else:
+ i = j
+ return path
+
+
+# Normalize a path, e.g. A//B, A/./B and A/foo/../B all become A/B.
+# It should be understood that this may change the meaning of the path
+# if it contains symbolic links!
+
+def normpath(path):
+ """Normalize path, eliminating double slashes, etc."""
+ if path == '':
+ return '.'
+ initial_slashes = path.startswith('/')
+ # POSIX allows one or two initial slashes, but treats three or more
+ # as single slash.
+ if (initial_slashes and
+ path.startswith('//') and not path.startswith('///')):
+ initial_slashes = 2
+ comps = path.split('/')
+ new_comps = []
+ for comp in comps:
+ if comp in ('', '.'):
+ continue
+ if (comp != '..' or (not initial_slashes and not new_comps) or
+ (new_comps and new_comps[-1] == '..')):
+ new_comps.append(comp)
+ elif new_comps:
+ new_comps.pop()
+ comps = new_comps
+ path = '/'.join(comps)
+ if initial_slashes:
+ path = '/'*initial_slashes + path
+ return path or '.'
+
+
+def abspath(path):
+ """Return an absolute path."""
+ if not isabs(path):
+ path = join(os.getcwd(), path)
+ return normpath(path)
+
+
+# Return a canonical path (i.e. the absolute location of a file on the
+# filesystem).
+
+def realpath(filename):
+ """Return the canonical path of the specified filename, eliminating any
+symbolic links encountered in the path."""
+ if isabs(filename):
+ bits = ['/'] + filename.split('/')[1:]
+ else:
+ bits = [''] + filename.split('/')
+
+ for i in range(2, len(bits)+1):
+ component = join(*bits[0:i])
+ # Resolve symbolic links.
+ if islink(component):
+ resolved = _resolve_link(component)
+ if resolved is None:
+ # Infinite loop -- return original component + rest of the path
+ return abspath(join(*([component] + bits[i:])))
+ else:
+ newpath = join(*([resolved] + bits[i:]))
+ return realpath(newpath)
+
+ return abspath(filename)
+
+
+def _resolve_link(path):
+ """Internal helper function. Takes a path and follows symlinks
+ until we either arrive at something that isn't a symlink, or
+ encounter a path we've seen before (meaning that there's a loop).
+ """
+ paths_seen = []
+ while islink(path):
+ if path in paths_seen:
+ # Already seen this path, so we must have a symlink loop
+ return None
+ paths_seen.append(path)
+ # Resolve where the link points to
+ resolved = os.readlink(path)
+ if not isabs(resolved):
+ dir = dirname(path)
+ path = normpath(join(dir, resolved))
+ else:
+ path = normpath(resolved)
+ return path
+
+supports_unicode_filenames = False
+
+def relpath(path, start=curdir):
+ """Return a relative version of a path"""
+
+ if not path:
+ raise ValueError("no path specified")
+
+ start_list = abspath(start).split(sep)
+ path_list = abspath(path).split(sep)
+
+ # Work out how much of the filepath is shared by start and path.
+ i = len(commonprefix([start_list, path_list]))
+
+ rel_list = [pardir] * (len(start_list)-i) + path_list[i:]
+ if not rel_list:
+ return curdir
+ return join(*rel_list)