sane-net(5) SANE Scanner Access Now Easy sane-net(5)NAMEsane-net - SANE network backend
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‐
This backend expects device names of the form:
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:
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:
# this is a comment
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:
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-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
The backend configuration file (see also description of
The static library implementing this backend.
The shared library implementing this backend (present on systems
that support dynamic loading).
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 /sys‐
tem/resources/sane-backends/1.0.18/etc/sane.d. If the value of
the environment variable ends with the directory separator char‐
acter, 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 "/system/resources/sane-back‐
ends/1.0.18/etc/sane.d" being searched (in this order).
A colon-separated list of host names or IP addresses to be con‐
tacted by this backend.
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.
If saned has timed out, the net backend may loop with authorization
SEE ALSOsane(7), saned(8), sane-dll(5), scanimage(1)
David Mosberger and Andreas Beck
sane-backends 1.0.18 8 Oct 2002 sane-net(5)