It is possible that this is a bug in that backend. perhaps you should call sane_get_devices again?
allan On Tue, Jul 31, 2012 at 10:13 AM, Aleksandr Dezhin <me at dezhin.net> wrote: > Hello, > > As I wrote, I'm trying to develop web interface for SANE. I am developing it > using Python.I do not want to lock device so that other WSGI-proccess > instances can access it. Atypical code flow is as follows: > > sane_init() > sane_get_devices() > > // user selected device, showing page with capabilities > sane_open(device_id) > sane_get_option_description() > sane_close() > > // user requested to scan page > sane_open(device_id) > sane_control_option() > sane_start() > sane_read() > sane_cancel() > sane_close() > > // program exitting > sane_exit() > > Canon LiDE 210 with genesys backend or HPLIP works as expected, but Mustek > Bearpaw 1200 CU Plus with gt68xx fails open_device() secondly, after > sane_close(). If I skip first open()/close() - second block works correctly. > What is this? Bug or feature? > > Sorry I can not give an example of a simple program in C. If it helps I can > send a link to the repository with my application. It contains some modified > version of the python C extension from pysane. > > Thanks. > > -- > sane-devel mailing list: sane-devel at lists.alioth.debian.org > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel > Unsubscribe: Send mail with subject "unsubscribe your_password" > to sane-devel-request at lists.alioth.debian.org -- "The truth is an offense, but not a sin"
