mirror of
https://github.com/python/cpython.git
synced 2024-11-30 13:24:13 +08:00
143 lines
3.4 KiB
Python
143 lines
3.4 KiB
Python
# os.py -- either mac, dos or posix depending on what system we're on.
|
|
|
|
# This exports:
|
|
# - all functions from either posix or mac, e.g., os.unlink, os.stat, etc.
|
|
# - os.path is either module posixpath or macpath
|
|
# - os.name is either 'posix' or 'mac'
|
|
# - 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 ':')
|
|
# - os.pathsep is the component separator used in $PATH etc
|
|
# - 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).
|
|
|
|
_osindex = {
|
|
'posix': ('.', '..', '/', ':', ':/bin:/usr/bin'),
|
|
'dos': ('.', '..', '\\', ';', '.;C:\\bin'),
|
|
'nt': ('.', '..', '\\', ';', '.;C:\\bin'),
|
|
'mac': (':', '::', ':', '\n', ':'),
|
|
}
|
|
|
|
# For freeze.py script:
|
|
if 0:
|
|
import posix
|
|
import posixpath
|
|
|
|
import sys
|
|
for name in _osindex.keys():
|
|
if name in sys.builtin_module_names:
|
|
curdir, pardir, sep, pathsep, defpath = _osindex[name]
|
|
exec 'from %s import *' % name
|
|
exec 'import %spath' % name
|
|
exec 'path = %spath' % name
|
|
exec 'del %spath' % name
|
|
try:
|
|
exec 'from %s import _exit' % name
|
|
except ImportError:
|
|
pass
|
|
try:
|
|
environ
|
|
except:
|
|
environ = {} # Make sure os.environ exists, at least
|
|
break
|
|
else:
|
|
del name
|
|
raise ImportError, 'no os specific module found'
|
|
|
|
def execl(file, *args):
|
|
execv(file, args)
|
|
|
|
def execle(file, *args):
|
|
env = args[-1]
|
|
execve(file, args[:-1], env)
|
|
|
|
def execlp(file, *args):
|
|
execvp(file, args)
|
|
|
|
def execlpe(file, *args):
|
|
env = args[-1]
|
|
execvpe(file, args[:-1], env)
|
|
|
|
def execvp(file, args):
|
|
_execvpe(file, args)
|
|
|
|
def execvpe(file, args, env):
|
|
_execvpe(file, args, env)
|
|
|
|
_notfound = None
|
|
def _execvpe(file, args, env = None):
|
|
if env:
|
|
func = execve
|
|
argrest = (args, env)
|
|
else:
|
|
func = execv
|
|
argrest = (args,)
|
|
env = environ
|
|
global _notfound
|
|
head, tail = path.split(file)
|
|
if head:
|
|
apply(func, (file,) + argrest)
|
|
return
|
|
if env.has_key('PATH'):
|
|
envpath = env['PATH']
|
|
else:
|
|
envpath = defpath
|
|
import string
|
|
PATH = string.splitfields(envpath, pathsep)
|
|
if not _notfound:
|
|
import tempfile
|
|
# Exec a file that is guaranteed not to exist
|
|
try: execv(tempfile.mktemp(), ())
|
|
except error, _notfound: pass
|
|
exc, arg = error, _notfound
|
|
for dir in PATH:
|
|
fullname = path.join(dir, file)
|
|
try:
|
|
apply(func, (fullname,) + argrest)
|
|
except error, (errno, msg):
|
|
if errno != arg[0]:
|
|
exc, arg = error, (errno, msg)
|
|
raise exc, arg
|
|
|
|
# Provide listdir for Windows NT that doesn't have it built in
|
|
if name == 'nt':
|
|
try:
|
|
_tmp = listdir
|
|
del _tmp
|
|
except NameError:
|
|
def listdir(name):
|
|
if path.ismount(name):
|
|
list = ['.']
|
|
else:
|
|
list = ['.', '..']
|
|
f = popen('dir/l/b ' + name, 'r')
|
|
line = f.readline()
|
|
while line:
|
|
list.append(line[:-1])
|
|
line = f.readline()
|
|
return list
|
|
|
|
|
|
# Change environ to automatically call putenv() if it exists
|
|
try:
|
|
_putenv = putenv
|
|
except NameError:
|
|
_putenv = None
|
|
if _putenv:
|
|
import UserDict
|
|
|
|
class _Environ(UserDict.UserDict):
|
|
def __init__(self, environ):
|
|
UserDict.UserDict.__init__(self)
|
|
self.data = environ
|
|
def __setitem__(self, key, item):
|
|
putenv(key, item)
|
|
self.data[key] = item
|
|
|
|
environ = _Environ(environ)
|