NAME [Toc] [Back]
deroff - remove nroff, tbl, and neqn constructs
SYNOPSIS [Toc] [Back]
deroff [-mx] [-w] [-i] [file ...]
DESCRIPTION [Toc] [Back]
deroff reads each file in sequence and removes all nroff requests,
macro calls, backslash constructs, neqn constructs (between .EQ and
.EN lines, and between delimiters - see neqn(1)), and tbl descriptions
(see tbl(1)), replacing them with white space (blanks and blank
lines), and writes the remainder of the file on the standard output.
deroff follows chains of included files (.so and .nx nroff/troff
formatter commands); if a file has already been included, a .so naming
that file is ignored and a .nx naming that file terminates execution.
If no input file is given, deroff reads the standard input.
The -m option can be followed by an m, s, or l. The -mm option causes
the macros be interpreted such that only running text is output (that
is, no text from macro lines). The -ml option forces the -mm option
and also causes deletion of lists associated with the mm macros.
If the -w option is given, the output is a word list, one ``word'' per
line, with all other characters deleted. Otherwise, the output
follows the original, with the deletions mentioned above. In text, a
``word'' is any multi-byte character string or any string that
contains at least two letters and is composed of letters, digits,
ampersands (&), and apostrophes ('); In a macro call, however, a
``word'' is a multi-byte character string or a string that begins with
at least two letters and contains a total of at least three letters.
Delimiters are any characters other than letters, digits, apostrophes,
and ampersands. Trailing apostrophes and ampersands are removed from
If the -i option is specified, deroff ignores the .so and .nx
EXTERNAL INFLUENCES [Toc] [Back]
LC_CTYPE determines the interpretation of text and filenames as single
and/or multi-byte characters. Note that multi-byte punctuation
characters are not recognized when using the -w option.
LC_MESSAGES determines the language in which messages are displayed.
If LC_CTYPE or LC_MESSAGES is not specified in the environment or is
set to the empty string, the value of LANG is used as a default for
each unspecified or empty variable. If LANG is not specified or is
set to the empty string, a default of "C" (see lang(5)) is used
instead of LANG.
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If any internationalization variable contains an invalid setting,
deroff behaves as if all internationalization variables are set to
"C". See environ(5).
International Code Set Support [Toc] [Back]
Single- and multi-byte character code sets are supported.
WARNINGS [Toc] [Back]
deroff is not a complete nroff interpreter; thus it can be confused by
subtle constructs. Most such errors result in too much rather than
too little output.
The -ml option does not handle nested lists correctly.
AUTHOR [Toc] [Back]
deroff was developed by the University of California, Berkeley.
SEE ALSO [Toc] [Back]
neqn(1), nroff(1), tbl(1).
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