[sane-devel] [scanbd] using scanbd and saned over network at the same time

Wilhelm wilhelm.meier at fh-kl.de
Fri Feb 19 18:00:07 UTC 2016

Hi Rolf,

your description looks reasonable.

Please ensure that scanbd (or systemd) really listens on port 6566:

[lmeier:/home/lmeier] $ sudo netstat -ltnp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address
State       PID/Program name
tcp        0      0    *
LISTEN      1/init
tcp        0      0    *
LISTEN      1119/httpd
tcp        0      0    *
LISTEN      1120/sshd
tcp        0      0   *
LISTEN      472/cupsd
tcp        0      0  *
LISTEN      1/init
tcp        0      0  *
LISTEN      1139/nginx: master

If thats ok check your scanimage:

[lmeier:/home/lmeier] $ strace scanimage -L 2>&1 | grep dll.conf
open("./dll.conf", O_RDONLY)            = -1 ENOENT (No such file or
open("/usr/local/etc/sane.d/dll.conf", O_RDONLY) = 4

Also you should check if the port is reachable or if some portfilter
sits there in between:

[lmeier:/home/lmeier] $ telnet localhost 6566
Connected to localhost.
Escape character is '^]'.

Please report your results.

Am 19.02.2016 um 17:29 schrieb Rolf Leggewie:
> Hello Wilhelm,
> thank you for the quick response.
> On 19.02.2016 22:52, Wilhelm wrote:
>> Am 19.02.2016 um 14:38 schrieb Rolf Leggewie:
>>> Hello,
>>> I'd like to know if it is possible to have a computer that does
>>> button-triggered scanning via scanbd but also exports the scanner over
>>> the network to be accesible via the common. How would one do that?
>> Well, absolutely: thats the whole story of scanbd (see the readme.txt of
>> scanbd).
> Well, I am aware of the general idea how saned and scanbd are supposed
> to interact.  It can be pretty complicated to configure this error-free.
>  Going from one machine back to a real network adds yet another layer of
> complexity (and I was bitching when getting saned over network to run
> for the first and a couple subsequent times).
> As you probably know, I added a couple of checks for common
> configuration errors to the Debian scanbd startup script.  Anything
> detected by
> http://anonscm.debian.org/cgit/collab-maint/scanbd.git/tree/debian/scanbd.init
> is OK on my scanbd server machine.  Button presses are detected fine by
> scanbd.  But with this configuration, the scanner will only be detected
> by sane-find-scanner and not be "scanimage -L".
> $ sane-find-scanner | grep ^found
> found USB scanner (vendor=0x04a9 [Canon], product=0x2213 [CanoScan]) at
> libusb:001:035
> Should this really be libusb?
> Only if I add the genesys backend to /etc/sane.d/dll.conf, shut down
> scanbd and start up saned do I get an output from "scanimage -L".
> $ scanimage -L
> device `genesys:libusb:001:035' is a Canon LiDE 35/40/50 flatbed scanner
> That's when I also get a response from a network-connected client.
> $ scanimage -L
> device `net:himbeere.local:genesys:libusb:001:035' is a Canon LiDE
> 35/40/50 flatbed scanner
> So, what am I likely doing wrong here? Any idea?
> When scanbd is running (and thus scanimage is broken locally as well as
> over the network), the following is the status:
> - scanbd service is running
> - saned service is stopped
> - /etc/sane.d/dll.conf contains only the net backend
> - /etc/scanbd/dll.conf does NOT contain the net backend
> - /etc/scanbd/dll.conf contains the necessary genesys backend
>   (and a few others)
> Regards
> Rolf


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