sane-net.5 - Online Linux Manual Page

sane−net - Online Linux Manual PageSection : 5
Updated : 14 Jul 2008
Source :
Note : SANE Scanner Access Now Easy
.IX sane−net

NAMEsane−net − SANE network backend

DESCRIPTIONThe sane−net library implements a SANE (Scanner Access Now Easy) backend 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 protected resources.

DEVICE NAMESThis 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

CONFIGURATIONThe net.conf file contains both backend options and a list of host names (or IP addresses) that should be contacted for scan requests. Anything that isn't one of the options listed below will be treated as an host name. connect_timeout = nsecs Timeout (in seconds) for the initial connection to the saned(8) server. This will prevent the backend from blocking for several minutes trying to connect to an unresponsive saned(8) host (network outage, host down, ...). The environment variable SANE_NET_TIMEOUT can also be used to specify the timeout at runtime. 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-separated list of hostnames or IP addresses that should be contacted in addition to the hosts mentioned in the configuration file. For example, 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 scanner.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−port service in /etc/services. The sane service should be defined using a line of the following form: sane−port 6566/tcp # SANE network scanner daemon

FILES/etc/sane.d/net.conf The backend configuration file (see also description of SANE_CONFIG_DIR below). /usr/lib64/sane/libsane−net.a The static library implementing this backend. /usr/lib64/sane/libsane−net.so The shared library implementing this backend (present on systems that support dynamic loading).

ENVIRONMENTSANE_CONFIG_DIR This environment variable specifies the list of directories that may contain the configuration file. On *NIX systems, the directories are separated by a colon (`:'), under OS/2, they are separated by a semi-colon (`;'). If this variable is not set, the configuration file is searched in two default directories: first, the current working directory (".") and then in /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 directories. For example, setting SANE_CONFIG_DIR to "/tmp/config:" would result in directories tmp/config, ., and /etc/sane.d" being searched (in this order). SANE_NET_HOSTS A colon-separated list of host names or IP addresses to be contacted by this backend. SANE_NET_TIMEOUT Number of seconds to wait for a response from the saned(8) server for the initial connection request. 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.

BUGSIf saned(8) has timed out, the net backend may loop with authorization requests.

SEE ALSOsane(7), saned(8), sane−dll(5), scanimage(1) http://www.penguin-breeder.org/?page=sane−net

AUTHORDavid Mosberger and Andreas Beck 0

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