sane-pnm - SANE PNM image reader pseudo-backend
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.
This backend provides two devices called 0
No configuration required.
- The static library implementing this backend.
- The shared library implementing this backend (present on
systems that support dynamic loading).
- 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
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.
Andreas Beck, Gordon Matzigkeit, and David Mosberger