Experimental Physics and
Industrial Control System

"Paduan Donadio, Marcio" <[email protected]> · Sat, 25 Mar 2017 02:27:48 +0000

Hello, Greg.

Here in SLAC, we faced the same problem but under Linux. We first ran the IOC with user1, generating autosave files with user1 as owner and next, we ran it with user2. The result was that on the second time, autosave tried to fchmod a file as user2, having user1 as the owner of the file, what is not allowed in Linux, and probably in your NFS server.

If you change the owner of your autosave files, probably you will not see the messages anymore.

Even having this solution, I see 2 improvement opportunities here:
1 - autosave is changing file permissions by default and does this silently. I think this should be an option to be chosen by the IOC engineer.
2 - autosave shows error -1 and this can be anything. There is no way to diagnose what is going on.

I am working on a patch with some suggestions to address this, and I will make a GitHub pull request soon.

I don't have experience with VxWorks, but maybe it can work for you, Greg. For now, if you want to build autosave without the need of changing file permissions, you can:

- modify asApp/src/Makefile, adding:
USR_CPPFLAGS += -DSET_FILE_PERMISSIONS=0

- modify asApp/src/save_restore.c, changing:
#ifndef _WIN32
  #ifndef SET_FILE_PERMISSIONS
    #define SET_FILE_PERMISSIONS 1
  #endif
#endif

Best regards,

Márcio.

________________________________________
De: [email protected] <[email protected]> em nome de J. Lewis Muir <[email protected]>
Enviado: quarta-feira, 22 de março de 2017 11:13
Para: Lawson, Gregory S.
Cc: [email protected]
Assunto: Re: Vxworks nfs write error?

On 03/17, Lawson, Gregory S. wrote:
> Host is RHELWS kernel 2.6.32-642.

What version of RHEL is that?

What version of NFS is the server providing?

Regards,

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System