NAME

       scanbd- Scanner button monitoring daemon

SYNOPSIS

       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)

DESCRIPTION

       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 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

OPTIONS

       -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

SIGNALS

       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) )

MAIN SCANBD CONFIGURATION

       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.

SEE ALSO

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

AUTHOR

       Louis Lagendijk