Guido van Rossum | eee9498 | 1991-11-12 15:38:08 +0000 | [diff] [blame] | 1 | # Temporary file name allocation |
Guido van Rossum | 41f9503 | 1992-03-31 19:02:01 +0000 | [diff] [blame] | 2 | # |
| 3 | # XXX This tries to be not UNIX specific, but I don't know beans about |
| 4 | # how to choose a temp directory or filename on MS-DOS or other |
| 5 | # systems so it may have to be changed... |
Guido van Rossum | eee9498 | 1991-11-12 15:38:08 +0000 | [diff] [blame] | 6 | |
| 7 | |
Guido van Rossum | 41f9503 | 1992-03-31 19:02:01 +0000 | [diff] [blame] | 8 | import os |
Guido van Rossum | eee9498 | 1991-11-12 15:38:08 +0000 | [diff] [blame] | 9 | |
Guido van Rossum | eee9498 | 1991-11-12 15:38:08 +0000 | [diff] [blame] | 10 | |
Guido van Rossum | 41f9503 | 1992-03-31 19:02:01 +0000 | [diff] [blame] | 11 | # Parameters that the caller may set to override the defaults |
Guido van Rossum | cff3454 | 1992-01-14 18:31:56 +0000 | [diff] [blame] | 12 | |
Guido van Rossum | 41f9503 | 1992-03-31 19:02:01 +0000 | [diff] [blame] | 13 | tempdir = None |
| 14 | template = None |
| 15 | |
| 16 | |
| 17 | # Function to calculate the directory to use |
| 18 | |
| 19 | def gettempdir(): |
Guido van Rossum | f4aaf86 | 1996-05-28 23:31:34 +0000 | [diff] [blame] | 20 | global tempdir |
Guido van Rossum | 4033ad7 | 1996-08-08 18:33:56 +0000 | [diff] [blame] | 21 | if tempdir is not None: |
| 22 | return tempdir |
Guido van Rossum | f4aaf86 | 1996-05-28 23:31:34 +0000 | [diff] [blame] | 23 | attempdirs = ['/usr/tmp', '/tmp', os.getcwd(), os.curdir] |
Guido van Rossum | 3e065ad | 1996-08-20 20:38:59 +0000 | [diff] [blame] | 24 | if os.name == 'nt': |
| 25 | attempdirs.insert(0, 'C:\\TEMP') |
| 26 | attempdirs.insert(0, '\\TEMP') |
Guido van Rossum | f4f756c | 1997-04-11 19:00:53 +0000 | [diff] [blame] | 27 | elif os.name == 'mac': |
| 28 | import macfs, MACFS |
| 29 | try: |
| 30 | refnum, dirid = macfs.FindFolder(MACFS.kOnSystemDisk, MACFS.kTemporaryFolderType, 0) |
| 31 | dirname = macfs.FSSpec((refnum, dirid, '')).as_pathname() |
| 32 | attempdirs.insert(0, dirname) |
| 33 | except macfs.error: |
| 34 | pass |
Guido van Rossum | f4aaf86 | 1996-05-28 23:31:34 +0000 | [diff] [blame] | 35 | if os.environ.has_key('TMPDIR'): |
| 36 | attempdirs.insert(0, os.environ['TMPDIR']) |
Guido van Rossum | 3e065ad | 1996-08-20 20:38:59 +0000 | [diff] [blame] | 37 | testfile = gettempprefix() + 'test' |
Guido van Rossum | f4aaf86 | 1996-05-28 23:31:34 +0000 | [diff] [blame] | 38 | for dir in attempdirs: |
| 39 | try: |
| 40 | filename = os.path.join(dir, testfile) |
| 41 | fp = open(filename, 'w') |
| 42 | fp.write('blat') |
| 43 | fp.close() |
| 44 | os.unlink(filename) |
| 45 | tempdir = dir |
| 46 | break |
| 47 | except IOError: |
| 48 | pass |
| 49 | if tempdir is None: |
| 50 | msg = "Can't find a usable temporary directory amongst " + `attempdirs` |
| 51 | raise IOError, msg |
| 52 | return tempdir |
Guido van Rossum | 41f9503 | 1992-03-31 19:02:01 +0000 | [diff] [blame] | 53 | |
| 54 | |
| 55 | # Function to calculate a prefix of the filename to use |
| 56 | |
| 57 | def gettempprefix(): |
| 58 | global template |
| 59 | if template == None: |
| 60 | if os.name == 'posix': |
| 61 | template = '@' + `os.getpid()` + '.' |
Guido van Rossum | f4f756c | 1997-04-11 19:00:53 +0000 | [diff] [blame] | 62 | elif os.name == 'mac': |
| 63 | template = 'Python-Tmp-' |
Guido van Rossum | 41f9503 | 1992-03-31 19:02:01 +0000 | [diff] [blame] | 64 | else: |
| 65 | template = 'tmp' # XXX might choose a better one |
| 66 | return template |
Guido van Rossum | cff3454 | 1992-01-14 18:31:56 +0000 | [diff] [blame] | 67 | |
Guido van Rossum | eee9498 | 1991-11-12 15:38:08 +0000 | [diff] [blame] | 68 | |
Guido van Rossum | 4a3a41f | 1991-12-26 13:10:50 +0000 | [diff] [blame] | 69 | # Counter for generating unique names |
Guido van Rossum | eee9498 | 1991-11-12 15:38:08 +0000 | [diff] [blame] | 70 | |
Guido van Rossum | 4a3a41f | 1991-12-26 13:10:50 +0000 | [diff] [blame] | 71 | counter = 0 |
Guido van Rossum | eee9498 | 1991-11-12 15:38:08 +0000 | [diff] [blame] | 72 | |
| 73 | |
Guido van Rossum | 41f9503 | 1992-03-31 19:02:01 +0000 | [diff] [blame] | 74 | # User-callable function to return a unique temporary file name |
Guido van Rossum | eee9498 | 1991-11-12 15:38:08 +0000 | [diff] [blame] | 75 | |
| 76 | def mktemp(): |
Guido van Rossum | 4a3a41f | 1991-12-26 13:10:50 +0000 | [diff] [blame] | 77 | global counter |
Guido van Rossum | 41f9503 | 1992-03-31 19:02:01 +0000 | [diff] [blame] | 78 | dir = gettempdir() |
| 79 | pre = gettempprefix() |
Guido van Rossum | eee9498 | 1991-11-12 15:38:08 +0000 | [diff] [blame] | 80 | while 1: |
Guido van Rossum | 41f9503 | 1992-03-31 19:02:01 +0000 | [diff] [blame] | 81 | counter = counter + 1 |
| 82 | file = os.path.join(dir, pre + `counter`) |
| 83 | if not os.path.exists(file): |
| 84 | return file |