bsddb read-only requires rw access to close?

[Harry Pehkonen]

Stats:
Python2.3
windows2000 professional

If I have ``Full Control'' of a bsddb file, no problem:

import bsddb
a = bsddb.btopen("c:/sharedrw/db/npanxx2pseudo.db", "r")
a.close()

.... but if I change to read-only access (as in permissions on file):
a = bsddb.btopen("c:/sharedrw/db/npanxx2pseudo.db", "r")
a.close()

Traceback (most recent call last):
File "<pyshell#30>", line 1, in -toplevel-
a.close()
File "C:\Python23\lib\bsddb\__init__.py", line 101, in close
v = self.db.close()
DBPermissionsError: (1, 'Operation not permitted')

Performing a close() with read/write access with file opened "r" does
not change the last-modified time/date.

Is this a bug?

Thanks!
Harry.

[Martin v. Löwis]

ha************@hotpop.com (Harry Pehkonen) writes:

Is this a bug?

Yes.

Without further investigation, it might be a bug in Python, _bsddb,
Sleepycat BSDDB, or the operating system, though.

Regards,
Martin

[дамјан г.]

Is this a bug?

Yes.

But since the DB is opened read-only, perhaps close() is not so important?!?

--
Дамјан (jabberID:da****@bagra.net.mk)

A: Because it reverses the logical flow of converstion.
Q: Why is top posting frowned upon?

[Skip Montanaro]

Harry> ... but if I change to read-only access (as in permissions on file):

a = bsddb.btopen("c:/sharedrw/db/npanxx2pseudo.db", "r")
a.close()
Harry> Traceback (most recent call last):
Harry> File "<pyshell#30>", line 1, in -toplevel-
Harry> a.close()
Harry> File "C:\Python23\lib\bsddb\__init__.py", line 101, in close
Harry> v = self.db.close()
Harry> DBPermissionsError: (1, 'Operation not permitted')

Harry> Performing a close() with read/write access with file opened "r" does
Harry> not change the last-modified time/date.

Harry> Is this a bug?

Dunno. Works for me on Mac OS X:

% python
Python 2.4a0 (#77, Aug 11 2003, 11:19:14)
[GCC 3.1 20020420 (prerelease)] on darwin
Type "help", "copyright", "credits" or "license" for more information. import bsddb
db = bsddb.btopen("foo.bt", "c")
db['1'] = '1'
db.close()
% chmod 444 foo.bt
% python
Python 2.4a0 (#77, Aug 11 2003, 11:19:14)
[GCC 3.1 20020420 (prerelease)] on darwin
Type "help", "copyright", "credits" or "license" for more information. import bsddb
db = bsddb.btopen("foo.bt", "r")
db.close()

Skip