sane-pnm.5



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

       /usr/local/lib/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 pnm backend is installed and saned is used to allow users on re-
       mote  computers  to scan on the local machine, pnm files can be read by
       the remote user. This is limited to the files saned can access (usually
       it's  running  as user "sane"). All pnm files can be read if saned runs
       as root which isn't recommended anyway. The 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 pnm
       backend over saned.


AUTHOR

       Andreas Beck, Gordon Matzigkeit, and David Mosberger


SEE ALSO

       sane(7)

                                  14 Jul 2008                      sane-pnm(5)

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