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 fron-
       tends.  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  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)