mirror of
https://github.com/python/cpython.git
synced 2024-11-30 18:51:15 +01:00
85 lines
2.0 KiB
Python
85 lines
2.0 KiB
Python
# Temporary file name allocation
|
|
#
|
|
# XXX This tries to be not UNIX specific, but I don't know beans about
|
|
# how to choose a temp directory or filename on MS-DOS or other
|
|
# systems so it may have to be changed...
|
|
|
|
|
|
import os
|
|
|
|
|
|
# Parameters that the caller may set to override the defaults
|
|
|
|
tempdir = None
|
|
template = None
|
|
|
|
|
|
# Function to calculate the directory to use
|
|
|
|
def gettempdir():
|
|
global tempdir
|
|
if tempdir is not None:
|
|
return tempdir
|
|
attempdirs = ['/usr/tmp', '/tmp', os.getcwd(), os.curdir]
|
|
if os.name == 'nt':
|
|
attempdirs.insert(0, 'C:\\TEMP')
|
|
attempdirs.insert(0, '\\TEMP')
|
|
elif os.name == 'mac':
|
|
import macfs, MACFS
|
|
try:
|
|
refnum, dirid = macfs.FindFolder(MACFS.kOnSystemDisk, MACFS.kTemporaryFolderType, 0)
|
|
dirname = macfs.FSSpec((refnum, dirid, '')).as_pathname()
|
|
attempdirs.insert(0, dirname)
|
|
except macfs.error:
|
|
pass
|
|
if os.environ.has_key('TMPDIR'):
|
|
attempdirs.insert(0, os.environ['TMPDIR'])
|
|
testfile = gettempprefix() + 'test'
|
|
for dir in attempdirs:
|
|
try:
|
|
filename = os.path.join(dir, testfile)
|
|
fp = open(filename, 'w')
|
|
fp.write('blat')
|
|
fp.close()
|
|
os.unlink(filename)
|
|
tempdir = dir
|
|
break
|
|
except IOError:
|
|
pass
|
|
if tempdir is None:
|
|
msg = "Can't find a usable temporary directory amongst " + `attempdirs`
|
|
raise IOError, msg
|
|
return tempdir
|
|
|
|
|
|
# Function to calculate a prefix of the filename to use
|
|
|
|
def gettempprefix():
|
|
global template
|
|
if template == None:
|
|
if os.name == 'posix':
|
|
template = '@' + `os.getpid()` + '.'
|
|
elif os.name == 'mac':
|
|
template = 'Python-Tmp-'
|
|
else:
|
|
template = 'tmp' # XXX might choose a better one
|
|
return template
|
|
|
|
|
|
# Counter for generating unique names
|
|
|
|
counter = 0
|
|
|
|
|
|
# User-callable function to return a unique temporary file name
|
|
|
|
def mktemp():
|
|
global counter
|
|
dir = gettempdir()
|
|
pre = gettempprefix()
|
|
while 1:
|
|
counter = counter + 1
|
|
file = os.path.join(dir, pre + `counter`)
|
|
if not os.path.exists(file):
|
|
return file
|