[sane-devel] Network backend and lineart mode

Aleksandr Dezhin me at dezhin.net
Tue Jul 31 13:15:54 UTC 2012

On 07/30/2012 11:57 PM, Stef wrote:
> could you send me the exact scanimage command you use on the client
> side ?

# scanimage -L
device `genesys:libusb:002:003' is a Canon LiDE 210 flatbed scanner
device `net:localhost:genesys:libusb:002:003' is a Canon LiDE 210 
flatbed scanner
# scanimage -d genesys:libusb:002:003 --mode Lineart --resolution 75 > 
/dev/null                <- work
# scanimage -d net:localhost:genesys:libusb:002:003 --mode Lineart 
--resolution 75 > /dev/null  <- freeze until Ctrl+C

Another example is somewhat strange behavior genesys backend over 
network in same setup. Perhaps you find time to look at this problem. 
Log files attached.

# SANE_DEBUG_GENESYS=255 scanimage --help -d genesys:libusb:001:002 -A > 
local.stdout 2> local.stderr         <- all ok in stdout
# SANE_DEBUG_GENESYS=255 saned -d255 >saned.stdout 2> saned.stderr &
# SANE_DEBUG_NET=255 scanimage --help -d 
net:localhost:genesys:libusb:001:002 -A > net.stdout 2> net.stderr   <- 
stdout incomplete, segfault
[1]+  Segmentation fault         saned -d255 1>saned.stdout 2>saned.stderr

When I try to get device options from remote host with sane 1.0.22, 
scanimage halfway asks me to authorize and some non ASCII characters:

(server) # SANE_DEBUG_GENESYS=255 saned -d255 >saned_remote.stdout 2> 
(client) # SANE_DEBUG_NETWORK=255 scanimage --help -d SANE_DEBUG_NET=255 
scanimage --help -d net: 
 >remote.stdout 2> remote.stderr

But scanimage -d net: --mode Color 
--resolution 75 > /dev/null works as expected without authorization.

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