[sane-devel] scanbd problem with dbus permission ?

Tue Aug 20 18:54:10 UTC 2013

Am 20.08.2013 18:17, schrieb Michael Markusch:
> Hi Wilhelm,
>
> thanks for your answer.
>
> I followed your notes but it still does not work.

sad but true ;-)

Looks like scanbd uses the wrong dll.conf, did you
export SANE_CONFIG_DIR=/usr/local/etc/scanbd ?

please show your configs:

/etc/sane/dll.conf
/usr/local/sbin/scanbd/dll.conf
/usr/local/etc/scanbd/scanbd.conf

and show the env-vars for the user starting the scanbd (root).

>
> - make distclean
> - ./configure
> - make
> - set in /usr/local/sbin/scanbd/dll.confonly "genesys"
> - sudo /usr/local/sbin/scanbd -d -f -c /usr/local/etc/scanbd/scanbd.conf
>
>> /usr/local/sbin/scanbd: debug on: level: 7
>> /usr/local/sbin/scanbd: dropping privs to uid saned
>> /usr/local/sbin/scanbd: dropping privs to gid lp
>> /usr/local/sbin/scanbd: drop privileges to gid: 7
>> /usr/local/sbin/scanbd: Running as effective gid 7
>> /usr/local/sbin/scanbd: drop privileges to uid: 112
>> /usr/local/sbin/scanbd: Running as effective uid 112
>> /usr/local/sbin/scanbd: dbus_init
>> /usr/local/sbin/scanbd: dbus match
>> type='signal',interface='org.freedesktop.Hal.Manager'
>> /usr/local/sbin/scanbd: sane version 1.0
>> /usr/local/sbin/scanbd: Scanning for local-only devices
>> /usr/local/sbin/scanbd: start_sane_threads
>> /usr/local/sbin/scanbd: start dbus thread
>> /usr/local/sbin/scanbd: udev init
>> /usr/local/sbin/scanbd: get udev monitor
>> /usr/local/sbin/scanbd: timeout: 500 ms
>> /usr/local/sbin/scanbd: udev fd is non-blocking, now setting to
>> blocking mode
>> /usr/local/sbin/scanbd: Iteration on dbus call
>> /usr/local/sbin/scanbd: start udev thread
>> /usr/local/sbin/scanbd: udev thread started
>> /usr/local/sbin/scanbd: Iteration on dbus call
>> /usr/local/sbin/scanbd: Iteration on dbus call
>> /usr/local/sbin/scanbd: Iteration on dbus call
>> /usr/local/sbin/scanbd: Iteration on dbus call
>> ...
>
> What else can I try?
>
> Thanks,
> Michael
>
>
> Am 20.08.2013 07:50, schrieb Wilhelm:
>> Hi Michael,
>>
>> Am 18.08.2013 14:33, schrieb Michael Markusch:
>>> Hi,
>>>
>>> I tried to install scanbd and I guess that's very easy, but now I have a
>>> permission problem. In the past I use my scanner with sane as scanserver
>>> and everything worked.
>>>
>>> My system:
>>> Debian Wheezy, Kernel 3.6.11 on Raspberry Pi
>>>
>>> Scanner:
>>> Canon canoscan lide 35
>>>
>>>
>>> Here my installation steps:
>>>
>>> - install libconfuse-dev libsane-dev libudev-dev libusb-dev
>>> - I use scanbd from SVN
>>> - ./configure --enable-scanbuttond (no problems)
>>
>> why did you enable scanbuttond-drivers. Your scanner should be fully
>> supported by the sane-backends (and as you said, scanimage is working)
>>
>>> - make (no problems)
>>> - make install (no problems)
>>> - copy scanbd_dbus.conf to /etc/dbus-1/system.d/
>>> - install xinetd
>>> - generate /etc/xinetd.d/sane-port
>>> - edit /etc/sane.d/dll.conf set only "net"
>>> - edit /usr/local/etc/scanbd/dll.conf set "#net"
>>
>> be sure to include the backend for your scanner
>>
>>> - edit /etc/sane.d/net.conf set localhost and connect_timeout = 60
>>> - copy backends /etc/sane.d/ to /usr/local/etc/scanbd/
>>> - export SANE_CONFIG_DIR=/usr/local/etc/scanbd
>>> - /usr/local/sbin/scanbd -d -f -c /usr/local/etc/scanbd/scanbd.conf
>>> (with problems)
>>>
>>> Log:
>>>
>>>> /usr/local/sbin/scanbd: debug on: level: 7
>>>> /usr/local/sbin/scanbd: dropping privs to uid saned
>>>> /usr/local/sbin/scanbd: dropping privs to gid lp
>>>> /usr/local/sbin/scanbd: drop privileges to gid: 7
>>>> /usr/local/sbin/scanbd: Can't set the effective gid to 7
>>>> /usr/local/sbin/scanbd: drop privileges to uid: 112
>>>> /usr/local/sbin/scanbd: Can't set the effective uid to 112
>>
>> If you start scanbd as unprivileged user it isn't possible to changed
>> the euid/egid. Start it as root and it will itself change the euid /
>> egid to the ones in the config file.
>>
>>>> /usr/local/sbin/scanbd: dbus_init
>>>> /usr/local/sbin/scanbd: dbus match
>>>> type='signal',interface='org.freedesktop.Hal.Manager'
>>>> /usr/local/sbin/scanbd: Loading
>>>> /usr/local/lib/scanbd/scanbuttond/backends/meta.so
>>>> /usr/local/sbin/scanbd: meta-backend: init
>>>> /usr/local/sbin/scanbd: libusbi: initializing...
>>>> /usr/local/sbin/scanbd: Loading
>>>> /usr/local/lib/scanbd/scanbuttond/backends/hp3500.so
>>>> /usr/local/sbin/scanbd: meta-backend: attaching backend: HP3500 USB
>>>> /usr/local/sbin/scanbd: hp3500-backend: init
>>>> /usr/local/sbin/scanbd: Loading
>>>> /usr/local/lib/scanbd/scanbuttond/backends/snapscan.so
>>>> /usr/local/sbin/scanbd: meta-backend: attaching backend: Snapscan USB
>>>> /usr/local/sbin/scanbd: snapscan-backend: init
>>>> /usr/local/sbin/scanbd: Loading
>>>> /usr/local/lib/scanbd/scanbuttond/backends/niash.so
>>>> /usr/local/sbin/scanbd: meta-backend: attaching backend: Niash USB
>>>> /usr/local/sbin/scanbd: niash-backend: init
>>>> /usr/local/sbin/scanbd: Loading
>>>> /usr/local/lib/scanbd/scanbuttond/backends/epson_vphoto.so
>>>> /usr/local/sbin/scanbd: meta-backend: attaching backend: Epson VX00
>>>> Photo USB
>>>> /usr/local/sbin/scanbd: epson-vphoto-backend: init
>>>> /usr/local/sbin/scanbd: Scanning for local-only devices
>>>> /usr/local/sbin/scanbd: Can't get the scbtn device list
>>
>> your scanner isn't recognized by the old scanbuttond-backends. As said
>> above please use the sane-backends
>>
>>>> /usr/local/sbin/scanbd: device list null
>>>> /usr/local/sbin/scanbd: start_scbtn_threads
>>>> /usr/local/sbin/scanbd: start the threads (0)
>>>> /usr/local/sbin/scanbd: start dbus thread
>>>> /usr/local/sbin/scanbd: Not Primary Owner (-1)
>>>> /usr/local/sbin/scanbd: Name Error (Connection ":1.48" is not allowed
>>>> to own the service "de.kmux.scanbd.server" due to security policies in
>>>> the configuration file)
>>>
>>> If I started scanbd as "sudo":
>>>
>>> Log:
>>>
>>>> ...
>>>> /usr/local/sbin/scanbd: meta-backend: attaching backend: Epson VX00
>>>> Photo USB
>>>> /usr/local/sbin/scanbd: epson-vphoto-backend: init
>>>> /usr/local/sbin/scanbd: Scanning for local-only devices
>>>> /usr/local/sbin/scanbd: Can't get the scbtn device list
>>>> /usr/local/sbin/scanbd: device list null
>>>> /usr/local/sbin/scanbd: start_scbtn_threads
>>>> /usr/local/sbin/scanbd: start the threads (0)
>>>> /usr/local/sbin/scanbd: start dbus thread
>>>> /usr/local/sbin/scanbd: timeout: 500 ms
>>>> /usr/local/sbin/scanbd: Iteration on dbus call
>>>> /usr/local/sbin/scanbd: Iteration on dbus call
>>>> /usr/local/sbin/scanbd: Iteration on dbus call
>>>> /usr/local/sbin/scanbd: Iteration on dbus call
>>>> /usr/local/sbin/scanbd: Iteration on dbus call
>>>> /usr/local/sbin/scanbd: Iteration on dbus call
>>>
>>> I tried also too:
>>>
>>> - SANE_CONFIG_DIR=/usr/local/etc/scanbd scanimage -L (with problems)
>>> - copy 99-saned.rules to /lib/udev/rules.d
>>> - udevadm trigger
>>> - SANE_CONFIG_DIR=/usr/local/etc/scanbd scanimage -L (with problems)
>>> - sudo SANE_CONFIG_DIR=/usr/local/etc/scanbd scanimage -L (no problems)
>>>
>>>
>>> I'm not familiar with dbus and so on... Can someone help me please?
>>
>> Please do:
>>
>> make distclean
>> ./configure
>> make
>>
>> and install it as above.
>> Then redo your tests.
>>
>>
>

-- 
Wilhelm
w.meier at unix.net

-- 
Wilhelm
w.meier at unix.net