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# 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 primarly 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/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
                  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  pnm  backend  is installed and saned 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 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)

    sane-backends 1.0.12-cvs         22 April 2001                     sane-pnm(5)