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-rw-r--r--lib/python2.7/whichdb.py117
1 files changed, 0 insertions, 117 deletions
diff --git a/lib/python2.7/whichdb.py b/lib/python2.7/whichdb.py
deleted file mode 100644
index 9071430..0000000
--- a/lib/python2.7/whichdb.py
+++ /dev/null
@@ -1,117 +0,0 @@
-# !/usr/bin/env python
-"""Guess which db package to use to open a db file."""
-
-import os
-import struct
-import sys
-
-try:
- import dbm
- _dbmerror = dbm.error
-except ImportError:
- dbm = None
- # just some sort of valid exception which might be raised in the
- # dbm test
- _dbmerror = IOError
-
-def whichdb(filename):
- """Guess which db package to use to open a db file.
-
- Return values:
-
- - None if the database file can't be read;
- - empty string if the file can be read but can't be recognized
- - the module name (e.g. "dbm" or "gdbm") if recognized.
-
- Importing the given module may still fail, and opening the
- database using that module may still fail.
- """
-
- # Check for dbm first -- this has a .pag and a .dir file
- try:
- f = open(filename + os.extsep + "pag", "rb")
- f.close()
- # dbm linked with gdbm on OS/2 doesn't have .dir file
- if not (dbm.library == "GNU gdbm" and sys.platform == "os2emx"):
- f = open(filename + os.extsep + "dir", "rb")
- f.close()
- return "dbm"
- except IOError:
- # some dbm emulations based on Berkeley DB generate a .db file
- # some do not, but they should be caught by the dbhash checks
- try:
- f = open(filename + os.extsep + "db", "rb")
- f.close()
- # guarantee we can actually open the file using dbm
- # kind of overkill, but since we are dealing with emulations
- # it seems like a prudent step
- if dbm is not None:
- d = dbm.open(filename)
- d.close()
- return "dbm"
- except (IOError, _dbmerror):
- pass
-
- # Check for dumbdbm next -- this has a .dir and a .dat file
- try:
- # First check for presence of files
- os.stat(filename + os.extsep + "dat")
- size = os.stat(filename + os.extsep + "dir").st_size
- # dumbdbm files with no keys are empty
- if size == 0:
- return "dumbdbm"
- f = open(filename + os.extsep + "dir", "rb")
- try:
- if f.read(1) in ("'", '"'):
- return "dumbdbm"
- finally:
- f.close()
- except (OSError, IOError):
- pass
-
- # See if the file exists, return None if not
- try:
- f = open(filename, "rb")
- except IOError:
- return None
-
- # Read the start of the file -- the magic number
- s16 = f.read(16)
- f.close()
- s = s16[0:4]
-
- # Return "" if not at least 4 bytes
- if len(s) != 4:
- return ""
-
- # Convert to 4-byte int in native byte order -- return "" if impossible
- try:
- (magic,) = struct.unpack("=l", s)
- except struct.error:
- return ""
-
- # Check for GNU dbm
- if magic in (0x13579ace, 0x13579acd, 0x13579acf):
- return "gdbm"
-
- # Check for old Berkeley db hash file format v2
- if magic in (0x00061561, 0x61150600):
- return "bsddb185"
-
- # Later versions of Berkeley db hash file have a 12-byte pad in
- # front of the file type
- try:
- (magic,) = struct.unpack("=l", s16[-4:])
- except struct.error:
- return ""
-
- # Check for BSD hash
- if magic in (0x00061561, 0x61150600):
- return "dbhash"
-
- # Unknown
- return ""
-
-if __name__ == "__main__":
- for filename in sys.argv[1:]:
- print whichdb(filename) or "UNKNOWN", filename