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Man Pages


Manual Reference Pages  -  MANDOC (1)

NAME

mandoc - format and display UNIX manuals

CONTENTS

Synopsis
Description
     Input Formats
     Output Formats
     ASCII Output
     HTML Output
     Locale Output
     Man Output
     PDF Output
     PostScript Output
     UTF-8 Output
     XHTML Output
Exit Status
Examples
Diagnostics
Compatibility
     ASCII Compatibility
     HTML/XHTML Compatibility
See Also
Authors
Caveats

SYNOPSIS

mandoc [-V] [-mformat] [-Ooption] [-Toutput] [-Wlevel] []

DESCRIPTION

The mandoc utility formats Unix manual pages for display.

By default, mandoc reads mdoc(7) or man(7) text from stdin, implying -m andoc, and produces -T ascii output.

The arguments are as follows:
-m format
  Input format. See Input Formats for available formats. Defaults to -m andoc.
-O option
  Comma-separated output options.
-T output
  Output format. See Output Formats for available formats. Defaults to -T ascii.
-V Print version and exit.
-W level
  Specify the minimum message level to be reported on the standard error output and to affect the exit status. The level can be warning, error, or fatal. The default is -W fatal; -W all is an alias for -W warning. See EXIT STATUS and DIAGNOSTICS for details.

The special option -W stop tells mandoc to exit after parsing a file that causes warnings or errors of at least the requested level. No formatted output will be produced from that file. If both a level and stop are requested, they can be joined with a comma, for example -W error, stop.

file Read input from zero or more files. If unspecified, reads from stdin. If multiple files are specified, mandoc will halt with the first failed parse.

    Input Formats

The mandoc utility accepts mdoc(7) and man(7) input with -m doc and -m an, respectively. The mdoc(7) format is strongly recommended; man(7) should only be used for legacy manuals.

A third option, -m andoc, which is also the default, determines encoding on-the-fly: if the first non-comment macro is 'Dd' or 'Dt', the mdoc(7) parser is used; otherwise, the man(7) parser is used.

If multiple files are specified with -m andoc, each has its file-type determined this way. If multiple files are specified and -m doc or -m an is specified, then this format is used exclusively.

    Output Formats

The mandoc utility accepts the following -T arguments, which correspond to output modes:
-T ascii Produce 7-bit ASCII output. This is the default. See ASCII Output.
-T html Produce strict CSS1/HTML-4.01 output. See HTML Output.
-T lint Parse only: produce no output. Implies -W warning.
-T locale
  Encode output using the current locale. See Locale Output.
-T man Produce man(7) format output. See Man Output.
-T pdf Produce PDF output. See PDF Output.
-T ps Produce PostScript output. See PostScript Output.
-T tree Produce an indented parse tree.
-T utf8 Encode output in the UTF-8 multi-byte format. See UTF-8 Output.
-T xhtml Produce strict CSS1/XHTML-1.0 output. See XHTML Output.

If multiple input files are specified, these will be processed by the corresponding filter in-order.

    ASCII Output

Output produced by -T ascii, which is the default, is rendered in standard 7-bit ASCII documented in ascii(7).

Font styles are applied by using back-spaced encoding such that an underlined character 'c' is rendered as '_ \[bs] c', where '\[bs]' is the back-space character number 8. Emboldened characters are rendered as 'c \[bs] c'.

The special characters documented in mandoc_char(7) are rendered best-effort in an ASCII equivalent. If no equivalent is found, '?' is used instead.

Output width is limited to 78 visible columns unless literal input lines exceed this limit.

The following -O arguments are accepted:
indent = indent
  The left margin for normal text is set to indent blank characters instead of the default of five for mdoc(7) and seven for man(7). Increasing this is not recommended; it may result in degraded formatting, for example overfull lines or ugly line breaks.
width = width
  The output width is set to width, which will normalise to >=60.

    HTML Output

Output produced by -T html conforms to HTML-4.01 strict.

The example.style.css file documents style-sheet classes available for customising output. If a style-sheet is not specified with -O style, -T html defaults to simple output readable in any graphical or text-based web browser.

Special characters are rendered in decimal-encoded UTF-8.

The following -O arguments are accepted:
fragment
  Omit the <!DOCTYPE> declaration and the <html>, <head>, and <body> elements and only emit the subtree below the <body> element. The style argument will be ignored. This is useful when embedding manual content within existing documents.
includes = fmt
  The string fmt, for example, ../src/%I.html, is used as a template for linked header files (usually via the 'In' macro). Instances of '%I' are replaced with the include filename. The default is not to present a hyperlink.
man = fmt
  The string fmt, for example, ../html%S/%N.%S.html, is used as a template for linked manuals (usually via the 'Xr' macro). Instances of '%N' and '%S' are replaced with the linked manual’s name and section, respectively. If no section is included, section 1 is assumed. The default is not to present a hyperlink.
style = style.css
  The file style.css is used for an external style-sheet. This must be a valid absolute or relative URI.

    Locale Output

Locale-depending output encoding is triggered with -T locale. This option is not available on all systems: systems without locale support, or those whose internal representation is not natively UCS-4, will fall back to -T ascii. See ASCII Output for font style specification and available command-line arguments.

    Man Output

Translate input format into man(7) output format. This is useful for distributing manual sources to legancy systems lacking mdoc(7) formatters.

If mdoc(7) is passed as input, it is translated into man(7). If the input format is man(7), the input is copied to the output, expanding any roff(7) 'so' requests. The parser is also run, and as usual, the -W level controls which DIAGNOSTICS are displayed before copying the input to the output.

    PDF Output

PDF-1.1 output may be generated by -T pdf. See PostScript Output for -O arguments and defaults.

    PostScript Output

PostScript "Adobe-3.0" Level-2 pages may be generated by -T ps. Output pages default to letter sized and are rendered in the Times font family, 11-point. Margins are calculated as 1/9 the page length and width. Line-height is 1.4m.

Special characters are rendered as in ASCII Output.

The following -O arguments are accepted:
paper = name
  The paper size name may be one of a3, a4, a5, legal, or letter. You may also manually specify dimensions as NNxNN, width by height in millimetres. If an unknown value is encountered, letter is used.

    UTF-8 Output

Use -T utf8 to force a UTF-8 locale. See Locale Output for details and options.

    XHTML Output

Output produced by -T xhtml conforms to XHTML-1.0 strict.

See HTML Output for details; beyond generating XHTML tags instead of HTML tags, these output modes are identical.

EXIT STATUS

The mandoc utility exits with one of the following values, controlled by the message level associated with the -W option:

0 No warnings or errors occurred, or those that did were ignored because they were lower than the requested level.
2 At least one warning occurred, but no error, and -W warning was specified.
3 At least one parsing error occurred, but no fatal error, and -W error or -W warning was specified.
4 A fatal parsing error occurred.
5 Invalid command line arguments were specified. No input files have been read.
6 An operating system error occurred, for example memory exhaustion or an error accessing input files. Such errors cause mandoc to exit at once, possibly in the middle of parsing or formatting a file.

Note that selecting -T lint output mode implies -W warning.

EXAMPLES

To page manuals to the terminal:

    $ mandoc -Wall,stop mandoc.1 2>&1 | less

    $ mandoc mandoc.1 mdoc.3 mdoc.7 | less

To produce HTML manuals with style.css as the style-sheet:

    $ mandoc -Thtml -Ostyle=style.css mdoc.7 > mdoc.7.html

To check over a large set of manuals:

    $ mandoc -Tlint ‘find /usr/src -name \*\.[1-9]‘

To produce a series of PostScript manuals for A4 paper:

    $ mandoc -Tps -Opaper=a4 mdoc.7 man.7 > manuals.ps

Convert a modern mdoc(7) manual to the older man(7) format, for use on systems lacking an mdoc(7) parser:

    $ mandoc -Tman foo.mdoc > foo.man

DIAGNOSTICS

Standard error messages reporting parsing errors are prefixed by


.Sm off
.Sm on

where the fields have the following meanings:
file The name of the input file causing the message.
line The line number in that input file. Line numbering starts at 1.
column
  The column number in that input file. Column numbering starts at 1. If the issue is caused by a word, the column number usually points to the first character of the word.
level The message level, printed in capital letters.

Message levels have the following meanings:
fatal The parser is unable to parse a given input file at all. No formatted output is produced from that input file.
error An input file contains syntax that cannot be safely interpreted, either because it is invalid or because mandoc does not implement it yet. By discarding part of the input or inserting missing tokens, the parser is able to continue, and the error does not prevent generation of formatted output, but typically, preparing that output involves information loss, broken document structure or unintended formatting.
warning
  An input file uses obsolete, discouraged or non-portable syntax. All the same, the meaning of the input is unambiguous and a correct rendering can be produced. Documents causing warnings may render poorly when using other formatting tools instead of mandoc.

Messages of the warning and error levels are hidden unless their level, or a lower level, is requested using a -W option or -T lint output mode.

The mandoc utility may also print messages related to invalid command line arguments or operating system errors, for example when memory is exhausted or input files cannot be read. Such messages do not carry the prefix described above.

COMPATIBILITY

This section summarises mandoc compatibility with GNU troff. Each input and output format is separately noted.

    ASCII Compatibility

  • Unrenderable unicode codepoints specified with '\[uNNNN]' escapes are printed as '?' in mandoc. In GNU troff, these raise an error.
  • The 'Bd -literal' and 'Bd -unfilled' macros of mdoc(7) in -T ascii are synonyms, as are -filled and -ragged.
  • In historic GNU troff, the 'Pa' mdoc(7) macro does not underline when scoped under an 'It' in the FILES section. This behaves correctly in mandoc.
  • A list or display following the 'Ss' mdoc(7) macro in -T ascii does not assert a prior vertical break, just as it doesn’t with 'Sh'.
  • The 'na' man(7) macro in -T ascii has no effect.
  • Words aren’t hyphenated.

    HTML/XHTML Compatibility

  • The '\fP' escape will revert the font to the previous '\f' escape, not to the last rendered decoration, which is now dictated by CSS instead of hard-coded. It also will not span past the current scope, for the same reason. Note that in ASCII Output mode, this will work fine.
  • The mdoc(7) 'Bl -hang' and 'Bl -tag' list types render similarly (no break following overreached left-hand side) due to the expressive constraints of HTML.
  • The man(7) 'IP' and 'TP' lists render similarly.

SEE ALSO

eqn(7), man(7), mandoc_char(7), mdoc(7), roff(7), tbl(7)

AUTHORS

The mandoc utility was written by
.An Kristaps Dzonsons ,
.Mt kristaps@bsd.lv .

CAVEATS

In -T html and -T xhtml, the maximum size of an element attribute is determined by BUFSIZ, which is usually 1024 bytes. Be aware of this when setting long link formats such as -O style = really/long/link.

Nesting elements within next-line element scopes of -m an, such as 'br' within an empty 'B', will confuse -T html and -T xhtml and cause them to forget the formatting of the prior next-line scope.

The '\(aq' control character is an alias for the standard macro control character and does not emit a line-break as stipulated in GNU troff.

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