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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 primarly 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.
The static library implementing this backend.
The shared library implementing this backend (present on systems that support
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 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
22 April 2001 sane-pnm(5)
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