07-31-2012
It tries to create the file before running it because that's how redirection works. You can't change what file stdout goes to for a different program once it's already running, but it's easy to do so in advance. So the shell makes a copy of itself, redirects, and replaces the copy with the program you wanted it to run.
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LEARN ABOUT SUSE
mpexpand
mpexpand(n) Documentation toolbox mpexpand(n)
__________________________________________________________________________________________________________________________________________________
NAME
mpexpand - Markup processor
SYNOPSIS
mpexpand ?-module module? format infile|- outfile|-
mpexpand.all ?-verbose? ?module?
_________________________________________________________________
DESCRIPTION
This manpage describes a processor / converter for manpages in the doctools format as specified in doctools_fmt. The processor is based
upon the package doctools.
mpexpand ?-module module? format infile|- outfile|-
The processor takes three arguments, namely the code describing which formatting to generate as the output, the file to read the
markup from, and the file to write the generated output into. If the infile is "-" the processor will read from stdin. If outfile is
"-" the processor will write to stdout.
If the option -module is present its value overrides the internal definition of the module name.
The currently known output formats are
nroff The processor generates *roff output, the standard format for unix manpages.
html The processor generates HTML output, for usage in and display by web browsers.
tmml The processor generates TMML output, the Tcl Manpage Markup Language, a derivative of XML.
latex The processor generates LaTeX output.
wiki The processor generates Wiki markup as understood by wikit.
list The processor extracts the information provided by manpage_begin.
null The processor does not generate any output.
mpexpand.all ?-verbose? ?module?
This command uses mpexpand to generate all possible output formats for all manpages in the current directory. The manpages are rec-
ognized through the extension ".man". If -verbose is specified the command will list its actions before executing them.
The module information is passed to mpexpand.
NOTES
Possible future formats are plain text, pdf and postscript.
SEE ALSO
expander(n), format(n), formatter(n)
KEYWORDS
HTML, TMML, conversion, manpage, markup, nroff
COPYRIGHT
Copyright (c) 2002 Andreas Kupries <andreas_kupries@users.sourceforge.net>
Copyright (c) 2003 Andreas Kupries <andreas_kupries@users.sourceforge.net>
doctools 1.0 mpexpand(n)