sane-net(5) SANE Scanner Access Now Easy sane-net(5)NAMEsane-net - SANE network backend
DESCRIPTION
The 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 pos-
sible to control devices attached to a remote host and
also provides a means to grant users access to protected
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 brack-
ets:
[::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 con-
figuration 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 neces-
sary to define the sane service in /etc/services. The
sane service should be defined using a line of the follow-
ing form:
sane 6566/tcp # SANE network scanner daemon
FILES
/usr/freeware/etc/sane.d/net.conf
The backend configuration file (see also descrip-
tion of SANE_CONFIG_DIR below).
/usr/freeware/lib32/sane/libsane-net.a
The static library implementing this backend.
/usr/freeware/lib32/sane/libsane-net.so
The shared library implementing this backend (pre-
sent 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
configuration file is searched in two default
directories: first, the current working directory
(".") and then in /usr/freeware/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 spec-
ified directories. For example, setting SANE_CON-
FIG_DIR to "/tmp/config:" would result in directo-
ries "tmp/config", ".", and "/usr/free-
ware/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_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 ALSOsane(7), saned(1), sane-dll(5), scanimage(1)
http://www.penguin-breeder.org/?page=sane-net
AUTHOR
David Mosberger and Andreas Beck
sane-backends 1.0.12 8 Oct 2002 sane-net(5)
