Bug: Cannot open .dbf files read only

[Sandro Tosi]

Hello,

as reported in Debian as http://bugs.debian.org/855131

$ chmod 0400 /tmp/test.dbf

$ python3

Python 3.5.3 (default, Jan 19 2017, 14:11:04)

[GCC 6.3.0 20170118] on linux

Type "help", "copyright", "credits" or "license" for more information.

>>> import dbf

>>> t = dbf.Table("/tmp/test.dbf")

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "/usr/lib/python3/dist-packages/dbf/ver_33.py", line 4761, in __init__

    raise DbfError(str(e)) from None

dbf.ver_33.DbfError: [Errno 13] Permission denied: '/tmp/test.dbf'

It seems that the code uses "r+b" for opening files "read only", and "w+b" to

open them read-write, forgetting that the "+" stands for "update".

the reporter kindly tested that replacing the opening mode from r+b to rb makes it possible to open read-only files, and provided the attached patch to do so.

this applies to 0.96.8 too

PS: it would be much better to be able to report issues on bitbucket than here