gdbm compatibility between linux and freebsd

[bucket79]

here's a problem
A is redhatlinux and B is freebsd

A)
$uname -a
Linux xxxxxxxxx 2.4.7-10 #1 Thu Sep 6 17:27:27 EDT 2001 i686 unknown

$python -V
Python 2.2.2

$ldd /usr/local/lib/python2.2/lib-dynload/gdbm.so
libgdbm.so.2 => /usr/lib/libgdbm.so.2 (0x4000a000)
libc.so.6 => /lib/i686/libc.so.6 (0x40011000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)

B)
$uname -a
FreeBSD xxx.xxx.xxx 5.1-CURRENT FreeBSD 5.1-CURRENT #0: Mon Aug 18
11:34:38 KST 2003 xxxxxxxxxxxxxxxxxxxxxx i386

$python -V
Python 2.2.3

$ldd /usr/local/lib/python2.2/site-packages/gdbm.so
libc_r.so.5 => /usr/lib/libkse.so.1 (0x2815e000)
libgdbm.so.3 => /usr/local/lib/libgdbm.so.3 (0x28180000)

and the problem is gdbm db file is not compatible between two system
for example
in system A)

import gdbm
f = gdbm.open("test.db", "c")
f["1"] = "first"
f.close()

and copy this file to freebsd system and try to open this file then it
fails !!
like this
in system B)Traceback (most recent call last):
File "<stdin>", line 1, in ?
gdbm.error: File read error

and reverse case is also fails. more precisely say in this case python
occurs gdbm FATAL error

anyone know what is the casuse of this problem?

 

[Arne Koewing]

here's a problem ....
and the problem is gdbm db file is not compatible between two system
for example ....
anyone know what is the casuse of this problem?

Yes and No ;-)

I do not think that gdbm-files could be considered 'portable'
(gdbm surely is, the files are (sometimes) not)

on freebsd systems `off_t` is (sometimes) 8 bytes, while on most
others it's just 4 bytes.

try changing off_t" to "loff_t" in gdbmdefs.h and recompile libgdmb
(breaking existing databases on the system !!!! )

or use some other format for interchanging information.

some people say bdb is not that problematic but I don't know...
(I'll treat all *db databases non-portable)
bdb databases can be be dumped to some interchangeable format.


Arne
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