Plan 9 - man page for lp (plan9 section 8)
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lp - PostScript preprocessors
These programs are part of the lp(1) suite. Each corresponds to a process in the -ppro-
cess option of lp and exists as an rc(1) script in /sys/lib/lp/process that provides an
interface to a PostScript conversion program in /$cputype/bin/aux. The list of processors
follows; after each description is a bracketed list of lp options to which the processor
is the default processor. It uses file(1) to determine the type of input and exe-
cutes the correct processor for a given (input, printer) pair.
post passes PostScript through, adding option patches for paper tray information. This
does not always work with PostScript generated on other systems.
noproc passes files through untouched.
ppost converts UTF text to PostScript. [DLcfilmnorxy]
converts tex(1) output to PostScript. [Lcinor]
g3post converts CCITT Group 3 FAX data to PostScript.
converts a Plan 9 bitmap such as /dev/window to PostScript. [Lm]
converts troff(1) output for device UTF (the default) to PostScript. [DLcimnorxy]
hpost adds a header page to the beginning of a PostScript printer job so that it may be
separated from other jobs in the output bin. The header has the image of the job's
owner from the directory of faces (see face(6)). Page reversal is also done in
The file command is not always smart enough to deal with certain file types. There are
PostScript conversion programs that do not have processors to drive them.
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