scanbd (8)

Polling mode:

scanbd [-c configfile ] [-f] [-d[debuglevel] ]

Manager-mode

The manager mode of scanbd that can be triggered by the -m option is not documented in this man-page but in scanbm(8)

scanbd is a scanner button monitoring daemon that can trigger execution of scripts when a button on a scanner is pressed. scanbd (the scanner button daemon) opens and polls the scanner and therefore locks the device. So no other application can access the device directly (open the /dev/..., or via libusb, etc).

To enable scanning from applications, we use scanbm as a "proxy" for saned to access the scanner from an application. scanbm listens for requests on the saned network port for scanning requests. If a scan request arrives, scanbm requests the scanbd daemon to release the scanner. Then it starts the real saned which scans and sends the data back to the requesting application. When the scanning is done and saned exits, the scanbm daemon tells scanbd to resume polling the scanner.

scanbd can be configured at compile time to either use sane to poll the scannner or use the scanbuttond backends to do so.

scanbd polls the scanner regularly (the interval can be set in scanbd.conf ) and monitors for any scanner button to be pressed. If it detects a button press it triggers execution of the appropriate script as defined in scanbd.conf

-c configfile --config=configfile

Use configfile instead of the default /etc/scanbd/scanbd.conf configuration file.

-d[debuglevel] --debug[=debuglevel]

turn debug mode on. If specified, set the debug level to debuglevel

1 = error

2 = warn

3 = info

4 - 7 = debug)

-f --foreground

Run scanbd in the foreground

SIGUSR1

Stop polling and relase the scanner (used by scanbm )

SIGUSR1

Resume polling (used by scanbm )

SIGHUP

Rescan for available devices (useful when no automatic detection is available (HAL, UDEV) )

scanbd and scanbm are configured trough scanbd.conf (/etc/scanbd/scanbd.conf). The distributed scanbd.conf contains a detailed explantion of the configuration options.

The -c option can be used to override the default configuration file.

scanbd shall normally be started from init using your operating system's start method. See the integration directory in the scanbd sources to see what is available for your OS and distribution.

scanbm(8), sane(7), saned(8), sane-dll(5), sane-net(5) /etc/scanbd/scanbd.conf

http://scanbd.sourceforge.net

Louis Lagendijk