Skip to content

C
cpython
Commit 289086ca authored by Martin v. Löwis's avatar Martin v. Löwis
Browse files
Options

Remove more DOS support.

parent d138c681
Show whitespace changes
Inline Side-by-side
Showing with 6 additions and 364 deletions
Lib/dospath.py deleted 100644 → 0
View file @ d138c681
"""Common operations on DOS pathnames."""
import os
import stat
__all__ = ["normcase","isabs","join","splitdrive","split","splitext",
"basename","dirname","commonprefix","getsize","getmtime",
"getatime","islink","exists","isdir","isfile","ismount",
"walk","expanduser","expandvars","normpath","abspath",
"supports_unicode_filenames"]
def normcase(s):
"""Normalize the case of a pathname.
On MS-DOS it maps the pathname to lowercase, turns slashes into
backslashes.
Other normalizations (such as optimizing '../' away) are not allowed
(this is done by normpath).
Previously, this version mapped invalid consecutive characters to a
single '_', but this has been removed. This functionality should
possibly be added as a new function."""
return s.replace("/", "\\").lower()
def isabs(s):
"""Return whether a path is absolute.
Trivial in Posix, harder on the Mac or MS-DOS.
For DOS it is absolute if it starts with a slash or backslash (current
volume), or if a pathname after the volume letter and colon starts with
a slash or backslash."""
s = splitdrive(s)[1]
return s != '' and s[:1] in '/\\'
def join(a, *p):
"""Join two (or more) paths."""
path = a
for b in p:
if isabs(b):
path = b
elif path == '' or path[-1:] in '/\\:':
path = path + b
else:
path = path + "\\" + b
return path
def splitdrive(p):
"""Split a path into a drive specification (a drive letter followed
by a colon) and path specification.
It is always true that drivespec + pathspec == p."""
if p[1:2] == ':':
return p[0:2], p[2:]
return '', p
def split(p):
"""Split a path into head (everything up to the last '/') and tail
(the rest). After the trailing '/' is stripped, the invariant
join(head, tail) == p holds.
The resulting head won't end in '/' unless it is the root."""
d, p = splitdrive(p)
# set i to index beyond p's last slash
i = len(p)
while i and p[i-1] not in '/\\':
i = i - 1
head, tail = p[:i], p[i:] # now tail has no slashes
# remove trailing slashes from head, unless it's all slashes
head2 = head
while head2 and head2[-1] in '/\\':
head2 = head2[:-1]
head = head2 or head
return d + head, tail
def splitext(p):
"""Split a path into root and extension.
The extension is everything starting at the first dot in the last
pathname component; the root is everything before that.
It is always true that root + ext == p."""
root, ext = '', ''
for c in p:
if c in '/\\':
root, ext = root + ext + c, ''
elif c == '.' or ext:
ext = ext + c
else:
root = root + c
return root, ext
def basename(p):
"""Return the tail (basename) part of a path."""
return split(p)[1]
def dirname(p):
"""Return the head (dirname) part of a path."""
return split(p)[0]
def commonprefix(m):
"""Return the longest prefix of all list elements."""
if not m: return ''
prefix = m[0]
for item in m:
for i in range(len(prefix)):
if prefix[:i+1] != item[:i+1]:
prefix = prefix[:i]
if i == 0: return ''
break
return prefix
# Get size, mtime, atime of files.
def getsize(filename):
"""Return the size of a file, reported by os.stat()."""
return os.stat(filename).st_size
def getmtime(filename):
"""Return the last modification time of a file, reported by os.stat()."""
return os.stat(filename).st_mtime
def getatime(filename):
"""Return the last access time of a file, reported by os.stat()."""
return os.stat(filename).st_atime
def islink(path):
"""Is a path a symbolic link?
This will always return false on systems where posix.lstat doesn't exist."""
return False
def exists(path):
"""Does a path exist?
This is false for dangling symbolic links."""
try:
st = os.stat(path)
except os.error:
return False
return True
def isdir(path):
"""Is a path a dos directory?"""
try:
st = os.stat(path)
except os.error:
return False
return stat.S_ISDIR(st.st_mode)
def isfile(path):
"""Is a path a regular file?"""
try:
st = os.stat(path)
except os.error:
return False
return stat.S_ISREG(st.st_mode)
def ismount(path):
"""Is a path a mount point?"""
# XXX This degenerates in: 'is this the root?' on DOS
return isabs(splitdrive(path)[1])
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."""
try:
names = os.listdir(top)
except os.error:
return
func(arg, top, names)
exceptions = ('.', '..')
for name in names:
if name not in exceptions:
name = join(top, name)
if isdir(name):
walk(name, func, arg)
def expanduser(path):
"""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.)"""
if path[:1] != '~':
return path
i, n = 1, len(path)
while i < n and path[i] not in '/\\':
i = i+1
if i == 1:
if not 'HOME' in os.environ:
return path
userhome = os.environ['HOME']
else:
return path
return userhome + path[i:]
def expandvars(path):
"""Expand paths containing shell variable substitutions.
The following rules apply:
- no expansion within single quotes
- no escape character, except for '$$' which is translated into '$'
- ${varname} is accepted.
- varnames can be made out of letters, digits and the character '_'"""
# XXX With COMMAND.COM you can use any characters in a variable name,
# XXX except '^|<>='.
if '$' not in path:
return path
import string
varchars = string.ascii_letters + string.digits + "_-"
res = ''
index = 0
pathlen = len(path)
while index < pathlen:
c = path[index]
if c == '\'': # no expansion within single quotes
path = path[index + 1:]
pathlen = len(path)
try:
index = path.index('\'')
res = res + '\'' + path[:index + 1]
except ValueError:
res = res + path
index = pathlen -1
elif c == '$': # variable or '$$'
if path[index + 1:index + 2] == '$':
res = res + c
index = index + 1
elif path[index + 1:index + 2] == '{':
path = path[index+2:]
pathlen = len(path)
try:
index = path.index('}')
var = path[:index]
if var in os.environ:
res = res + os.environ[var]
except ValueError:
res = res + path
index = pathlen - 1
else:
var = ''
index = index + 1
c = path[index:index + 1]
while c != '' and c in varchars:
var = var + c
index = index + 1
c = path[index:index + 1]
if var in os.environ:
res = res + os.environ[var]
if c != '':
res = res + c
else:
res = res + c
index = index + 1
return res
def normpath(path):
"""Normalize a path, e.g. A//B, A/./B and A/foo/../B all become A/B.
Also, components of the path are silently truncated to 8+3 notation."""
path = path.replace("/", "\\")
prefix, path = splitdrive(path)
while path[:1] == "\\":
prefix = prefix + "\\"
path = path[1:]
comps = path.split("\\")
i = 0
while i < len(comps):
if comps[i] == '.':
del comps[i]
elif comps[i] == '..' and i > 0 and \
comps[i-1] not in ('', '..'):
del comps[i-1:i+1]
i = i - 1
elif comps[i] == '' and i > 0 and comps[i-1] != '':
del comps[i]
elif '.' in comps[i]:
comp = comps[i].split('.')
comps[i] = comp[0][:8] + '.' + comp[1][:3]
i = i + 1
elif len(comps[i]) > 8:
comps[i] = comps[i][:8]
i = i + 1
else:
i = i + 1
# If the path is now empty, substitute '.'
if not prefix and not comps:
comps.append('.')
return prefix + "\\".join(comps)
def abspath(path):
"""Return an absolute path."""
if not isabs(path):
path = join(os.getcwd(), path)
return normpath(path)
# realpath is a no-op on systems without islink support
realpath = abspath
supports_unicode_filenames = False
Lib/os.py
View file @ 289086ca
r"""OS routines for Mac, DOS, NT, or Posix depending on what system we're on.
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'
- all functions from posix, nt, os2, mac, or ce, e.g. unlink, stat, etc.
- os.path is one of the modules posixpath, ntpath, or macpath
- os.name is 'posix', 'nt', '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 '\\')
......@@ -74,24 +74,6 @@ elif 'nt' in _names:
__all__.extend(_get_exports_list(nt))
del nt
elif 'dos' in _names:
name = 'dos'
linesep = '\r\n'
curdir = '.'; pardir = '..'; sep = '\\'; pathsep = ';'
defpath = '.;C:\\bin'
from dos import *
try:
from dos import _exit
except ImportError:
pass
import dospath
path = dospath
del dospath
import dos
__all__.extend(_get_exports_list(dos))
del dos
elif 'os2' in _names:
name = 'os2'
linesep = '\r\n'
......@@ -365,17 +347,17 @@ else:
import UserDict
# Fake unsetenv() for Windows
# not sure about os2 and dos here but
# not sure about os2 here but
# I'm guessing they are the same.
if name in ('os2', 'nt', 'dos'):
if name in ('os2', 'nt'):
def unsetenv(key):
putenv(key, "")
if name == "riscos":
# On RISC OS, all env access goes through getenv and putenv
from riscosenviron import _Environ
elif name in ('os2', 'nt', 'dos'): # Where Env Var Names Must Be UPPERCASE
elif name in ('os2', 'nt'): # Where Env Var Names Must Be UPPERCASE
# But we store them as upper case
class _Environ(UserDict.IterableUserDict):
def __init__(self, environ):
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7