mirror of https://github.com/python/cpython
81 lines
2.0 KiB
Python
81 lines
2.0 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 ':')
|
|
|
|
# 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).
|
|
|
|
# XXX This is incorrect if the import *path fails...
|
|
|
|
try:
|
|
from posix import *
|
|
try:
|
|
from posix import _exit
|
|
except ImportError:
|
|
pass
|
|
name = 'posix'
|
|
curdir = '.'
|
|
pardir = '..'
|
|
sep = '/'
|
|
import posixpath
|
|
path = posixpath
|
|
del posixpath
|
|
except ImportError:
|
|
try:
|
|
from mac import *
|
|
name = 'mac'
|
|
curdir = ':'
|
|
pardir = '::'
|
|
sep = ':'
|
|
import macpath
|
|
path = macpath
|
|
del macpath
|
|
except ImportError:
|
|
from dos import *
|
|
name = 'dos'
|
|
curdir = '.' # XXX doesn't always work
|
|
pardir = '..' # XXX doesn't always work
|
|
sep = '/' # XXX or '\\' ???
|
|
import dospath
|
|
path = dospath
|
|
del dospath
|
|
|
|
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 execvp(file, args):
|
|
if '/' in file:
|
|
execv(file, args)
|
|
return
|
|
ENOENT = 2
|
|
if environ.has_key('PATH'):
|
|
import string
|
|
PATH = string.splitfields(environ['PATH'], ':')
|
|
else:
|
|
PATH = ['', '/bin', '/usr/bin']
|
|
exc, arg = (ENOENT, 'No such file or directory')
|
|
for dir in PATH:
|
|
fullname = path.join(dir, file)
|
|
try:
|
|
execv(fullname, args)
|
|
except error, (errno, msg):
|
|
if errno != ENOENT:
|
|
exc, arg = error, (errno, msg)
|
|
raise exc, arg
|