Re: clipper f/r locking failure

Mgr. Peter Tuharsky
2004-01-26T10:27:43Z

Hi!

I run a clipper app by two users simultaneously on a machine, using
LTSP thin client for one of them. I don't use lredir; both users have
their own dosemu installations, only the Clipper program directory is
physically only at one place, and for the second user is accessed by
using standard directory symlink placed inside of his DOSEMU structure.
It works nice for me, on standard local Linux filesystem Ext3 under
Linux 2.6. Just the access privilegues are to be set correctly in Linux;
both users in the same group with rw access to all files, try running
chgrp -R <groupname> *
chmod -R 770 *
for the Clipper program directory

and place the
umask 007
command somewhere near beginning of dosemu starting script (in both
user's installations).

Does it help?

Yassen Damyanov wrote:

> hi all,
>
> I've been trying for quite some time to run a clipper accounting
> application within DOSEMU/FreeDOS (also within DOSEMU/MS-DOS 7). The
> thing runs just fine until time comes to do the clipper file and
> record locking (flock, rlock). In this case, when running two DOSEMU
> instances on one and the same machine, and files are shared via
> lredir, one of two clients hangs. (If you wonder how two clients
> operate on one machine at the same time, they are remote X terminals).
>
> DOSEMU leaves a message like this after terminating the hang client:
>
> "ERROR: SS selector invalid: 0x6A22, type=0 np=1"
>
> The linux version is 2.4.20; the DOSEMU is 1.1.99. I tried with the
> FreeDOS shipped together with the binary distro of DOSEMU; also with
> MS-DOS 7 as I said already (which shows me that the problem, ot at
> leats part of it, is not in the DOS but in the emulator). The clipper
> version is 5.3b and uses standard clipper locking functions (flock,
> rlock). If any other information is needed, just let me know.
>
> Please help me somehow to solve this. I was fighting quite a long time
> with this sole trouble. If I succeed, a well known accounting software
> in my country will get a reliable and legal open source platform to
> run on! Would be REALLY GREAT! Many people know of the experiment and
> often ask me how are things going on... I would like DOSEMU to win
> this case :-) Hope it will.
>
> --
>
> What I intend to try last (after trying so many options, like sharing
> a disk image or a real vfat partion (yes, bad ideas, but I tried these
> to see what happens), is to activate networking on each DOSEMU session
> and try to mount to a samba share somewhere on the local net.
>
> Any comments and suggestions are more than welcome.
> I would appreciate any help -- thanks in advance!
>
> Regards,
> Yassen
>
>
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