sane-net.5

sane-net(5)              SANE Scanner Access Now Easy              sane-net(5)

NAME

       sane-net - SANE network backend

DESCRIPTION

       The  sane-net library implements a SANE (Scanner Access Now Easy) back-
       end that provides access to image acquisition devices through a network
       connection.   This  makes  it possible to control devices attached to a
       remote host and also provides a means to grant  users  access  to  pro-
       tected resources.

DEVICE NAMES

       This backend expects device names of the form:

              host:device

       Where host is the name (or IP address) of the (remote-) host and device
       is the name of the device on this host that should  be  addressed.   If
       the device name does not contain a colon (:), then the entire string is
       treated as the device string for the default host.  The default host is
       the host listed last in the configuration file (see below).

       An IPv6 address can be specified enclosed in square brackets:

              [::1]:device

CONFIGURATION

       The  contents  of  the  net.conf  file  is  a list of host names (or IP
       addresses) that should be contacted for scan requests.  Empty lines and
       lines  starting  with  a  hash  mark  (#)  are ignored.  Note that IPv6
       addresses in this file do not need to be enclosed in  square  brackets.
       A sample configuration file is shown below:

              scan-server.somedomain.firm
              192.168.0.1
              # this is a comment
              localhost
              ::1

       The  above  list of hosts can be extended at run-time using environment
       variable SANE_NET_HOSTS.  This environment variable  is  a  colon-sepa-
       rated  list  of  hostnames  or IP addresses that should be contacted in
       addition to the hosts mentioned in the configuration file.   For  exam-
       ple, a user could set the environment variable to the string:

              new.scanner.com:[::1]:192.168.0.2:scanner.univ.edu

       To  request  that hosts new.scanner.com , [::1] , 192.168.0.2 and scan-
       ner.univ.edu are contacted in addition to the hosts listed above.

       For this backend to function properly, it is also necessary  to  define
       the  sane service in /etc/services.  The sane service should be defined
       using a line of the following form:

              sane 6566/tcp # SANE network scanner daemon

FILES

       /usr/local/etc/sane.d/net.conf
              The  backend  configuration  file  (see  also   description   of
              SANE_CONFIG_DIR below).

       /usr/local/lib/sane/libsane-net.a
              The static library implementing this backend.

       /usr/local/lib/sane/libsane-net.so
              The shared library implementing this backend (present on systems
              that support dynamic loading).

ENVIRONMENT

       SANE_CONFIG_DIR
              This environment variable specifies the list of directories that
              may contain the configuration file.  Under UNIX, the directories
              are separated by a colon (`:'), under OS/2, they  are  separated
              by a semi-colon (`;').  If this variable is not set, the config-
              uration file is searched in two default directories: first,  the
              current     working     directory     (".")    and    then    in
              /usr/local/etc/sane.d.  If the value of the environment variable
              ends  with  the  directory separator character, then the default
              directories are searched after the explicitly specified directo-
              ries.   For  example,  setting SANE_CONFIG_DIR to "/tmp/config:"
              would   result   in   directories   "tmp/config",    ".",    and
              "/usr/local/etc/sane.d" being searched (in this order).

       SANE_NET_HOSTS
              A  colon-separated list of host names or IP addresses to be con-
              tacted by this backend.

       SANE_DEBUG_NET
              If the library was compiled with  debug  support  enabled,  this
              environment  variable controls the debug level for this backend.
              E.g., a value of 128 requests all debug output  to  be  printed.
              Smaller levels reduce verbosity.

BUGS

       If  saned  has  timed  out, the net backend may loop with authorization
       requests.

SEE ALSO

       sane(7), saned(1), sane-dll(5), scanimage(1)

       http://www.penguin-breeder.org/?page=sane-net

AUTHOR

       David Mosberger and Andreas Beck

sane-backends 1.0.13              8 Oct 2002                       sane-net(5)