[sane-devel] Running sane din docker

[Jan De Luyck]

Hello,

I'm currently trying to get Sane to run inside a docker container.
Reasons being that I can't modify the OS of the underlying machine, but
I can play with docker containers.

By sharing the /dev/bus/usb filesystem to the container, and mapping the
necessary ports, I've gotten it to run (using runit to keep the services
up and running). The scanner is detected, and I can start a remote scan
- unfortunately it never completes, it fails shortly in the scan with a
SIGPIPE error, and the client app (being scanimage or xsane) bombs out.

The docker container is based on Debian Stable, I have dbus running
inside it and ahavi is available.

Running scanimage -T returns:
$ scanimage -T
scanimage: scanning image of size 638x877 pixels at 24 bits/pixel
scanimage: acquiring RGB frame, 8 bits/sample
scanimage: reading one scanline, 1914 bytes...  FAIL No data
scanimage: reading one byte...          FAIL No data
scanimage: stepped read, 2 bytes...     FAIL No data
scanimage: stepped read, 4 bytes...     FAIL No data
scanimage: stepped read, 8 bytes...     FAIL No data
scanimage: stepped read, 16 bytes...    FAIL No data
scanimage: stepped read, 32 bytes...    FAIL No data
scanimage: stepped read, 64 bytes...    FAIL No data
scanimage: stepped read, 128 bytes...   FAIL No data
scanimage: stepped read, 256 bytes...   FAIL No data
scanimage: stepped read, 512 bytes...   FAIL No data
scanimage: stepped read, 1024 bytes...  FAIL No data
scanimage: stepped read, 2048 bytes...  FAIL No data
scanimage: stepped read, 2047 bytes...  FAIL No data
scanimage: stepped read, 1023 bytes...  FAIL No data
scanimage: stepped read, 511 bytes...   FAIL No data
scanimage: stepped read, 255 bytes...   FAIL No data
scanimage: stepped read, 127 bytes...   FAIL No data
scanimage: stepped read, 63 bytes...    FAIL No data
scanimage: stepped read, 31 bytes...    FAIL No data
scanimage: stepped read, 15 bytes...    FAIL No data
scanimage: stepped read, 7 bytes...     FAIL No data
scanimage: stepped read, 3 bytes...     FAIL No data
scanimage: received signal 13
scanimage: trying to stop scanner
Segmentation fault

The last messages I get from saned -d128 are:

[saned] do_scan: trying to write 8192 bytes to client
[saned] quit: received signal 13

Stracing saned gave me:
960  write(2, "[saned] ", 8)           = 8
1960  write(2, "do_scan: trying to read 8188 bytes from scanner\n", 48)
= 48
1960  write(2, "[saned] ", 8)           = 8
1960  write(2, "do_scan: read 8188 bytes from scanner\n", 38) = 38
1960  select(135, [4], [134], NULL, {tv_sec=0, tv_usec=0}) = 1 (out
[134], left {tv_sec=0, tv_usec=0})
1960  write(2, "[saned] ", 8)           = 8
1960  write(2, "do_scan: trying to write 8192 bytes to client\n", 46) =
46
1960  write(2, "do_scan: trying to read 8188 bytes from scanner\n", 48)
= 48
1960  write(2, "[saned] ", 8)           = 8
1960  write(2, "do_scan: read 8188 bytes from scanner\n", 38) = 38
1960  select(135, [4], [134], NULL, {tv_sec=0, tv_usec=0}) = 1 (out
[134], left {tv_sec=0, tv_usec=0})
1960  write(2, "[saned] ", 8)           = 8
1960  write(2, "do_scan: trying to write 8192 bytes to client\n", 46) =
46
1960  select(135, [4], [134], NULL, {tv_sec=0, tv_usec=0}) = 1 (out
[134], left {tv_sec=0, tv_usec=0})
1960  write(2, "[saned] ", 8)           = 8
1960  write(2, "do_scan: trying to write 8192 bytes to client\n", 46) =
46
1960  write(134,
"\0\0\37\374\372\370\373\372\370\374\373\371\374\373\371\374\373\371\374\373\371\374\373\371\371\370\3
66\372\371\367\372\371\367\373\372\370\373\372\370\372\371\367\372\371\367\371\370\366\372\372\370\372\372\370\372\372\
370\372\372\370\372\372\370\372\372\370\372\372\370\372\372\370\372\372\370\372\372\370\372\372\370\372\372\370\372\372
"..., 8192) = -1 EPIPE (Broken pipe)
1960  --- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=1960,
si_uid=0} ---  
1960  write(2, "[saned] ", 8)           = 8
1960  write(2, "quit: received signal 13\n", 25) = 25

Does anyone here have any idea how I could figure out what's going wrong
here? The first 8192 bytes of data get send, the second always fails.

Thanks in advance for any answers,

Jan