[sane-devel] Permissions problem with Epson 1640 & Solaris

[Henning Meier-Geinitz]

Hi,

On Wed, Mar 27, 2002 at 01:54:47PM +0100, Johan Bengtsson wrote:
> gorthaur:elijah 13:48 ~ > scanimage -L
> device `epson:/dev/scsi/processor/c1t5d0' is a Epson Perfection1640 flatbed scanner

This means that access to the device is possible (inquiry was sent).

> gorthaur:elijah 13:40 ~ > ls -laL /dev/scsi/processor/c1t5d0 
> crw-rw----   1 root     scanner  151,   5 Mar 27 12:14  /dev/scsi/processor/c1t5d0
> 
> gorthaur:elijah 13:48 ~ > ls -laL /opt/pd/bin/scanimage
> -rwxr-sr-x   1 root     scanner    119412 Mar  5 12:01 /opt/pd/bin/scanimage
> 
> gorthaur:elijah 13:40 ~ > /opt/pd/bin/scanimage -d epson:/dev/scsi/processor/c1t5d0
> scanimage: sane_start: Error during device I/O

Bye the way, this would output the image data on stdout.

> It works to scan as root. We have an Umax scanner that is set up with
> exactly the config (not the same backend of course...) that works like it
> should....

My dirst idea was that the epson backend uses fork() for the reader
process and may lose its sgid permission and umax doesn't use fork().
However, from a quick grep it looks like it's the other way round.

Anyway you could try to add your user to group scanner to check if
that's the problem.

I'm a bit surprised that an IO error occurs and not an "access denied".
You could try something like:

SANE_DEBUG_EPSON=255 scanimage -d epson:/dev/scsi/processor/c1t5d0 >pnm.out

to find out where exactly the error occurs. If you think it's related
to the SCSI system you can also set SANE_DEBUG_SANEI_SCSI=255.

Bye,
  Henning