sane-pnm(5)
NAME
sane-pnm - SANE PNM image reader pseudo-backend
DESCRIPTION
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 back
end.
DEVICE NAMES
This backend provides two devices called 0 and 1.
CONFIGURATION
No configuration required.
FILES
- /usr/lib/sane/libsane-pnm.a
- The static library implementing this backend.
- /usr/lib/sane/libsane-pnm.so
- The shared library implementing this backend (pre
sent 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