[sane-devel] scanbd problem with dbus permission ?

Tue Feb 26 10:23:16 UTC 2013

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Hello,

I found some solution for my problem :
First, I noticed than the file scanbd_dbus.conf wasn't in the system.d
folder, so I added it.

The error changed : no more dbus connection error but endless
"Iteration on dbus call" in the log...

It seems that if I start scanbd right after inetd, this error shows.
Bur if I start inetd, then do a "scanimage -L" or another use of the
scanner via sane, then start scanbd, it works like a charm !

So I modify the udev rule so that when the scanner is turned on, it
launches inetd, then imagescan -L, then scanbd :

# Epson Perfection V500 Photo
ENV{ID_VENDOR_ID}=="04b8", ENV{ID_MODEL_ID}=="0130", ACTION=="add",
RUN+="/usr/sbin/service inetutils-inetd start",
RUN+="/usr/bin/scanimage -L", RUN+="/usr/sbin/service scanbd start"
ENV{ID_VENDOR_ID}=="04b8", ENV{ID_MODEL_ID}=="0130", ACTION=="remove",
RUN+="/usr/sbin/service scanbd stop", RUN+="/usr/sbin/service
inetutils-inetd stop"

I don't know if it is a configuration problem or a bug...

Best regard

stout

On 25/02/2013 21:32, stout wrote:
> Hello,
> 
> Something strange happened :
> 
> 2 months ago,I managed to get scanbd to work perfectly with my
> epson V500 scanner, built my own script, ..., was very proud of
> myself...
> 
> ... until today, where after 2 months of not using it, I tried to
> use a button, and it did not work !! I must have changed something,
> during those 2 months, but I really don't know what...
> 
> So, the scanner is plugged in a Debian 6, the debug log shows these
> errors :
> 
> scanbd: start dbus thread scanbd: Not Primary Owner (-1) scanbd:
> Name Error (Connection ":1.8" is not allowed to own the service
> "de.kmux.scanbd.server" due to security policies in the 
> configuration
> 
> and later :
> 
> scanbd: polling device Perfection V500 scanbd:
> epson-vphoto-backend: communication error: read length:0 
> (expected:1)
> 
> (the full log is pasted afterwards)
> 
> I tried to modify the user/group in scanbd.conf (trying lp, saned, 
> scanner, root..) with no change.
> 
> The UDEV rule for the scanner seems to make it belong to the
> "scanner" group : ATTRS{idVendor}=="04b8",
> ATTRS{idProduct}=="0130", MODE="0664", GROUP="scanner",
> ENV{libsane_matched}="yes"
> 
> Don't hesitate to ask me for more informations if needed...
> 
> Thanks for your help !
> 
> best regards
> 
> stout
> 
> 
> here is the full log :
> 
> scanbd -f scanbd: debug on: level: 7 scanbd: dropping privs to uid
> saned scanbd: dropping privs to gid scanner scanbd: group scanner
> has member: scanbd: saned scanbd: root scanbd: lp scanbd: drop
> privileges to gid: 113 scanbd: Running as effective gid 113 scanbd:
> drop privileges to uid: 109 scanbd: Running as effective uid 109 
> scanbd: dbus_init scanbd: dbus match
> type='signal',interface='org.freedesktop.Hal.Manager' scanbd:
> Loading /usr/local/lib/scanbd/scanbuttond/backends/meta.so scanbd:
> meta-backend: init scanbd: libusbi: initializing... scanbd: Loading
> /usr/local/lib/scanbd/scanbuttond/backends/hp3500.so scanbd:
> meta-backend: attaching backend: HP3500 USB scanbd: hp3500-backend:
> init scanbd: Loading
> /usr/local/lib/scanbd/scanbuttond/backends/snapscan.so scanbd:
> meta-backend: attaching backend: Snapscan USB scanbd:
> snapscan-backend: init scanbd: Loading
> /usr/local/lib/scanbd/scanbuttond/backends/niash.so scanbd:
> meta-backend: attaching backend: Niash USB scanbd: niash-backend:
> init scanbd: Loading
> /usr/local/lib/scanbd/scanbuttond/backends/epson_vphoto.so scanbd:
> meta-backend: attaching backend: Epson VX00 Photo USB scanbd:
> epson-vphoto-backend: init scanbd: meta-backend: attached scanner
> "Epson Perfection V500" scanbd: Scanning for local-only devices 
> scanbd: found device: Perfection V500 Epson
> epkowa:interpreter:001:004 scanbd: start_scbtn_threads scanbd:
> start the threads (1) scanbd: Starting poll thread for Perfection
> V500 scanbd: Thread started for device Perfection V500 scanbd:
> scbtn_poll scanbd: start dbus thread scanbd: Not Primary Owner
> (-1) scanbd: Name Error (Connection ":1.8" is not allowed to own
> the service "de.kmux.scanbd.server" due to security policies in
> the configuration file) scanbd: found 4 options for device
> Perfection V500 scanbd: sane_find_matching_options scanbd: no
> matching actions in section (null) scanbd:
> sane_find_matching_functions scanbd: scanbuttond backends can't use
> function definitions scanbd: found 1 local device sections scanbd:
> checking device section V500 with filter: (.*V500.*) scanbd: found
> 4 local action for device Perfection V500 [V500] scanbd:
> sane_find_matching_options scanbd: found 4 actions in section V500 
> scanbd: checking action scan with filter: ^web.* scanbd:
> scanbtnd_button_name (1) scanbd: scanbtnd_button_name, backend:
> Epson VX00 Photo USB scanbd: found active option[0] web for device
> Perfection V500 scanbd: installing action scan (0) for Perfection
> V500, option[0]: web as: myV500.script scanbd: multiple actions
> allowed scanbd: scanbtnd_button_name (2) scanbd:
> scanbtnd_button_name, backend: Epson VX00 Photo USB scanbd: found
> active option[1] email for device Perfection V500 scanbd:
> scanbtnd_button_name (3) scanbd: scanbtnd_button_name, backend:
> Epson VX00 Photo USB scanbd: found active option[2] copy for device
> Perfection V500 scanbd: scanbtnd_button_name (4) scanbd:
> scanbtnd_button_name, backend: Epson VX00 Photo USB scanbd: found
> active option[3] send for device Perfection V500 scanbd: checking
> action email with filter: ^copy.* scanbd: scanbtnd_button_name (1) 
> scanbd: scanbtnd_button_name, backend: Epson VX00 Photo USB scanbd:
> found active option[0] web for device Perfection V500 scanbd:
> scanbtnd_button_name (2) scanbd: scanbtnd_button_name, backend:
> Epson VX00 Photo USB scanbd: found active option[1] email for
> device Perfection V500 scanbd: scanbtnd_button_name (3) scanbd:
> scanbtnd_button_name, backend: Epson VX00 Photo USB scanbd: found
> active option[2] copy for device Perfection V500 scanbd: installing
> action email (1) for Perfection V500, option[2]: copy as:
> myV500.script scanbd: multiple actions allowed scanbd:
> scanbtnd_button_name (4) scanbd: scanbtnd_button_name, backend:
> Epson VX00 Photo USB scanbd: found active option[3] send for device
> Perfection V500 scanbd: checking action copy with filter: ^email.* 
> scanbd: scanbtnd_button_name (1) scanbd: scanbtnd_button_name,
> backend: Epson VX00 Photo USB scanbd: found active option[0] web
> for device Perfection V500 scanbd: scanbtnd_button_name (2) scanbd:
> scanbtnd_button_name, backend: Epson VX00 Photo USB scanbd: found
> active option[1] email for device Perfection V500 scanbd:
> installing action copy (2) for Perfection V500, option[1]: email
> as: myV500.script scanbd: multiple actions allowed scanbd:
> scanbtnd_button_name (3) scanbd: scanbtnd_button_name, backend:
> Epson VX00 Photo USB scanbd: found active option[2] copy for device
> Perfection V500 scanbd: scanbtnd_button_name (4) scanbd:
> scanbtnd_button_name, backend: Epson VX00 Photo USB scanbd: found
> active option[3] send for device Perfection V500 scanbd: checking
> action pdf with filter: ^send.* scanbd: scanbtnd_button_name (1) 
> scanbd: scanbtnd_button_name, backend: Epson VX00 Photo USB scanbd:
> found active option[0] web for device Perfection V500 scanbd:
> scanbtnd_button_name (2) scanbd: scanbtnd_button_name, backend:
> Epson VX00 Photo USB scanbd: found active option[1] email for
> device Perfection V500 scanbd: scanbtnd_button_name (3) scanbd:
> scanbtnd_button_name, backend: Epson VX00 Photo USB scanbd: found
> active option[2] copy for device Perfection V500 scanbd:
> scanbtnd_button_name (4) scanbd: scanbtnd_button_name, backend:
> Epson VX00 Photo USB scanbd: found active option[3] send for device
> Perfection V500 scanbd: installing action pdf (3) for Perfection
> V500, option[3]: send as: myV500.script scanbd: multiple actions
> allowed scanbd: sane_find_matching_functions scanbd: no matching
> functions in section V500 scanbd: timeout: 500 ms scanbd: Start the
> polling for device Perfection V500 scanbd: polling thread for
> Perfection V500 cancellation point scanbd: polling device
> Perfection V500 scanbd: epson-vphoto-backend: communication error:
> read length:0 (expected:1) scanbd: button 0 scanbd: option: 1 
> scanbd: scanbtnd_button_name (1) scanbd: scanbtnd_button_name,
> backend: Epson VX00 Photo USB scanbd: checking option web number 1
> (0) for device Perfection V500 scanbd: option: 3 scanbd:
> scanbtnd_button_name (3) scanbd: scanbtnd_button_name, backend:
> Epson VX00 Photo USB scanbd: checking option copy number 3 (1) for
> device Perfection V500 scanbd: option: 2 scanbd:
> scanbtnd_button_name (2) scanbd: scanbtnd_button_name, backend:
> Epson VX00 Photo USB scanbd: checking option email number 2 (2) for
> device Perfection V500 scanbd: option: 4 scanbd:
> scanbtnd_button_name (4) scanbd: scanbtnd_button_name, backend:
> Epson VX00 Photo USB scanbd: checking option send number 4 (3) for
> device Perfection V500 scanbd: polling thread for Perfection V500
> cancellation point scanbd: polling device Perfection V500
> 
> 

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