sane-pnm - SANE PNM image reader pseudo-backend
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.
This backend provides two devices called
0 and
1.
No configuration required.
- /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).
- 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.
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).
Andreas Beck, Gordon Matzigkeit, and David Mosberger
sane(7),
saned(8)