NAME

       sane-pnm - SANE PNM image reader pseudo-backend

DESCRIPTION

       The  sane-pnm  library  implements  a  SANE (Scanner Access Now Easy) backend that provides access to PNM
       (Portable aNyMap files, which covers PBM bitmap files, PGM grayscale files, and PPM pixmap  files).   The
       purpose  of  this  backend  is  primarily  to  aid  in debugging of SANE frontends.  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  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 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)