sane-pnm(5) SANE Scanner Access Now Easy sane-pnm(5)
NAME
sane-pnm - SANE PNM image reader pseudo-backend
DESCRIPTION
The sane-pnm library implements a SANE (Scanner Access Now Easy) back-
end that provides access to PNM (Portable aNyMap files, which covers
PBM bitmap files, PGM grayscale files, and PPM pixmap files). The pur-
pose of this backend is primarily to aid in debugging of SANE front-
ends. It also serves as an illustrative example of a minimal SANE
backend.
DEVICE NAMES
This backend provides two devices called 0 and 1.
CONFIGURATION
No configuration required.
FILES
/usr/lib/x86_64-linux-gnu/sane/libsane-pnm.a
The static library implementing this backend.
/usr/lib/x86_64-linux-gnu/sane/libsane-pnm.so
The shared library implementing this backend (present on systems
that support dynamic loading).
ENVIRONMENT
SANE_DEBUG_PNM
If the library was compiled with debug support enabled, this en-
vironment 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 the sane-pnm backend is installed and saned(8) is used to allow
users on remote computers to scan on the local machine, PNM files can
be read by the remote user. This is limited to the files saned(8) can
access (usually it's running as user "sane"). All PNM files can be read
if saned(8) runs as root which isn't recommended anyway. The sane-pnm
backend is disabled by default. If you want to use it, enable it with
configure (see configure --help for details). Be sure that only trusted
users can access the sane-pnm backend over saned(8).
AUTHOR
Andreas Beck, Gordon Matzigkeit, and David Mosberger
SEE ALSO
sane(7), saned(8)
14 Jul 2008 sane-pnm(5)
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