Ubuntu Manpage: groff_man - compose manual pages with GNU roff

Name

       groff_man - compose manual pages with GNU roff

Synopsis

       groff -man [option ...] [file ...]
       groff -m man [option ...] [file ...]

Description

The GNU implementation of the man macro package is part of the groff document formatting
system. It is used to produce manual pages (“man pages”) like the one you are reading.

This document presents the macros thematically; for those needing only a quick reference,
the following table lists them alphabetically, with cross references to appropriate
subsections below.

Man page authors and maintainers who are not already experienced groff users should
consult groff_man_style(7), an expanded version of this document, for additional
explanations and advice. It covers only those concepts required for man page document
maintenance, and not the full breadth of the groff typesetting system.

Macro Meaning Subsection
───────────────────────────────────────────────────────────────
.B Bold Font style macros
.BI Bold, italic alternating Font style macros
.BR Bold, roman alternating Font style macros
.EE Example end Document structure macros
.EX Example begin Document structure macros
.I Italic Font style macros
.IB Italic, bold alternating Font style macros
.IP Indented paragraph Paragraphing macros
.IR Italic, roman alternating Font style macros
.LP Begin paragraph Paragraphing macros
.ME Mail-to end Hyperlink macros
.MR Man page cross reference Hyperlink macros
.MT Mail-to start Hyperlink macros
.P Begin paragraph Paragraphing macros
.PP Begin paragraph Paragraphing macros
.RB Roman, bold alternating Font style macros
.RE Relative inset end Document structure macros
.RI Roman, italic alternating Font style macros
.RS Relative inset start Document structure macros
.SB Small bold Font style macros
.SH Section heading Document structure macros
.SM Small Font style macros
.SS Subsection heading Document structure macros
.SY Synopsis start Command synopsis macros
.TH Title heading Document structure macros
.TP Tagged paragraph Paragraphing macros
.TQ Supplemental paragraph tag Paragraphing macros
.UE URI end Hyperlink macros
.UR URI start Hyperlink macros
.YS Synopsis end Command synopsis macros

We discuss other macros (.AT, .DT, .HP, .OP, .PD, and .UC) in subsection “Deprecated
features” below.

Throughout Unix documentation, a manual entry is referred to simply as a “man page”,
regardless of its length, without gendered implication, and irrespective of the macro
package selected for its composition.

Macro reference preliminaries
A tagged paragraph describes each macro. We present coupled pairs together, as with .EX
and .EE.

An empty macro argument can be specified with a pair of double-quotes (""), but the man
package is designed such that this should seldom be necessary. Most macro arguments will
be formatted as text in the output; exceptions are noted.

Document structure macros
Document structure macros organize a man page's content. All of them break the output
line. .TH (title heading) identifies the document as a man page and configures the page
headers and footers. Section headings (.SH), one of which is mandatory and many of which
are conventionally expected, facilitate location of material by the reader and aid the man
page writer to discuss all essential aspects of the topic. Subsection headings (.SS) are
optional and permit sections that grow long to develop in a controlled way. Many
technical discussions benefit from examples; lengthy ones, especially those reflecting
multiple lines of input to or output from the system, are usefully bracketed by .EX and
.EE. When none of the foregoing meets a structural demand, use .RS/.RE to inset a region
within a (sub)section.

.TH topic section [footer-middle] [footer-inside] [header-middle]
Determine the contents of the page header and footer. The subject of the man page
is topic and the section of the manual to which it belongs is section. See man(1)
or intro(1) for the manual sectioning applicable to your system. topic and section
are positioned together at the left and right in the header (with section in
parentheses immediately appended to topic). footer-middle is centered in the
footer. The arrangement of the rest of the footer depends on whether double-sided
layout is enabled with the option -rD1. When disabled (the default), footer-inside
is positioned at the bottom left. Otherwise, footer-inside appears at the bottom
left on recto (odd-numbered) pages, and at the bottom right on verso (even-
numbered) pages. The outside footer is the page number, except in the continuous-
rendering mode enabled by the option -rcR=1, in which case it is the topic and
section, as in the header. header-middle is centered in the header. If section is
an integer between 1 and 9 (inclusive), there is no need to specify header-middle;
an.tmac will supply text for it. The macro package may also abbreviate topic and
footer-inside with ellipses if they would overrun the space available in the header
and footer, respectively. For HTML output, headers and footers are suppressed.

Additionally, this macro breaks the page, resetting the number to 1 (unless the
-rC1 option is given). This feature is intended only for formatting multiple man
documents in sequence.

A valid man document calls .TH once, early in the file, prior to any other macro
calls.

.SH [heading-text]
Set heading-text as a section heading. If no argument is given, a one-line input
trap is planted; text on the next line becomes heading-text. The left margin is
reset to zero to set the heading text in bold (or the font specified by the string
HF), and, on typesetting devices, slightly larger than the base type size. If the
heading font \*[HF] is bold, use of an italic style in heading-text is mapped to
the bold-italic style if available in the font family. The inset level is reset to
1, setting the left margin to the value of the IN register. Text after heading-
text is set as an ordinary paragraph (.P).

The content of heading-text and ordering of sections follows a set of common
practices, as has much of the layout of material within sections. For example, a
section called “Name” or “NAME” must exist, must be the first section after the .TH
call, and must contain only text of the form
topic[, another-topic]... \- summary-description
for a man page to be properly indexed. See groff_man_style(7) for suggestions and
man(7) for the conventions prevailing on your system.

.SS [subheading-text]
Set subheading-text as a subsection heading indented between a section heading and
an ordinary paragraph (.P). If no argument is given, a one-line input trap is
planted; text on the next line becomes subheading-text. The left margin is reset
to the value of the SN register to set the heading text in bold (or the font
specified by the string HF). If the heading font \*[HF] is bold, use of an italic
style in subheading-text is mapped to the bold-italic style if available in the
font family. The inset level is reset to 1, setting the left margin to the value
of the IN register. Text after subheading-text is set as an ordinary paragraph
(.P).

.EX
.EE Begin and end example. After .EX, filling is disabled and a constant-width
(monospaced) font is selected. Calling .EE enables filling and restores the
previous font.

These macros are extensions introduced in Ninth Edition Research Unix. Systems
running that troff, or those from Documenter's Workbench, Heirloom Doctools, or
Plan 9 troff support them. To be certain your page will be portable to systems
that do not, copy their definitions from the an-ext.tmac file of a groff
installation.

.RS [inset-amount]
Start a new relative inset level. The position of the left margin is saved, then
moved right by inset-amount, if specified, and by the amount of the IN register
otherwise. Calls to .RS can be nested; each increments by 1 the inset level used
by .RE. The level prior to any .RS calls is 1.

.RE [level]
End a relative inset. The left margin corresponding to inset level level is
restored. If no argument is given, the inset level is reduced by 1.

Paragraphing macros
An ordinary paragraph (.P) is set without a first-line indentation at the current left
margin. In man pages and other technical literature, definition lists are frequently
encountered; these can be set as “tagged paragraphs”, which have one (.TP) or more (.TQ)
leading tags followed by a paragraph that has an additional indentation. The indented
paragraph (.IP) macro is useful to continue the indented content of a narrative started
with .TP, or to present an itemized or ordered list. All of these macros break the output
line. If another paragraph macro has occurred since the previous .SH or .SS, they (except
for .TQ) follow the break with a default amount of vertical space, which can be changed by
the deprecated .PD macro; see subsection “Horizontal and vertical spacing” below. They
also reset the type size and font style to defaults (.TQ again excepted); see subsection
“Font style macros” below.

.P
.LP
.PP Begin a new paragraph; these macros are synonymous. The indentation is reset to
the default value; the left margin, as affected by .RS and .RE, is not.

.TP [indentation]
Set a paragraph with a leading tag, and the remainder of the paragraph indented. A
one-line input trap is planted; text on the next line, which can be formatted with
a macro, becomes the tag, which is placed at the current left margin. The tag can
be extended with the \c escape sequence. Subsequent text is indented by
indentation, if specified, and by the amount of the IN register otherwise. If the
tag is not as wide as the indentation, the paragraph starts on the same line as the
tag, at the applicable indentation, and continues on the following lines.
Otherwise, the descriptive part of the paragraph begins on the line following the
tag.

.TQ Set an additional tag for a paragraph tagged with .TP. An input trap is planted as
with .TP.

This macro is a GNU extension not defined on systems running AT&T, Plan 9, or
Solaris troff; see an-ext.tmac in section “Files” below.

.IP [tag] [indentation]
Set an indented paragraph with an optional tag. The tag and indentation arguments,
if present, are handled as with .TP, with the exception that the tag argument to
.IP cannot include a macro call.

Command synopsis macros
.SY and .YS aid you to construct a command synopsis that has the classical Unix
appearance. They break the output line.

These macros are GNU extensions not defined on systems running AT&T, Plan 9, or Solaris
troff; see an-ext.tmac in section “Files” below.

.SY command
Begin synopsis. A new paragraph begins at the left margin unless .SY has already
been called without a corresponding .YS, in which case only a break is performed.
Adjustment and automatic hyphenation are disabled. command is set in bold. If a
break is required, lines after the first are indented by the width of command plus
a space.

.YS End synopsis. Indentation, adjustment, and hyphenation are restored to their
previous states.

Hyperlink macros
Man page cross references are best presented with .MR. Text may be hyperlinked to email
addresses with .MT/.ME or other URIs with .UR/.UE. Hyperlinked text is supported on HTML
and terminal output devices; terminals and pager programs must support ECMA-48 OSC 8
escape sequences (see grotty(1)). When device support is unavailable or disabled with the
U register (see section “Options” below), .MT and .UR URIs are rendered between angle
brackets after the linked text.

.MT, .ME, .UR, and .UE are GNU extensions not defined on systems running AT&T, Plan 9, or
Solaris troff; see an-ext.tmac in section “Files” below. Plan 9 from User Space's troff
implements .MR.

The arguments to .MR, .MT, and .UR should be prepared for typesetting since they can
appear in the output. Use special character escape sequences to encode Unicode basic
Latin characters where necessary, particularly the hyphen-minus. The formatter removes \:
escape sequences from hyperlinks when supplying device control commands to output drivers.

.MR topic manual-section [trailing-text]
(since groff 1.23) Set a man page cross reference as “topic(manual-section)”. If
trailing-text (typically punctuation) is specified, it follows the closing
parenthesis without intervening space. Hyphenation is disabled while the cross
reference is set. topic is set in the font specified by the MF string. The cross
reference hyperlinks to a URI of the form “man:topic(manual-section)”.

.MT address
.ME [trailing-text]
Identify address as an RFC 6068 addr-spec for a “mailto:” URI with the text between
the two macro calls as the link text. An argument to .ME is placed after the link
text without intervening space. address may not be visible in the rendered
document if hyperlinks are enabled and supported by the output driver. If they are
not, address is set in angle brackets after the link text and before trailing-text.
If hyperlinking is enabled but there is no link text, address is formatted and
hyperlinked without angle brackets.

.UR uri
.UE [trailing-text]
Identify uri as an RFC 3986 URI hyperlink with the text between the two macro calls
as the link text. An argument to .UE is placed after the link text without
intervening space. uri may not be visible in the rendered document if hyperlinks
are enabled and supported by the output driver. If they are not, uri is set in
angle brackets after the link text and before trailing-text. If hyperlinking is
enabled but there is no link text, uri is formatted and hyperlinked without angle
brackets.

The hyperlinking of .TP paragraph tags with .UR/.UE and .MT/.ME is not yet supported; if
attempted, the hyperlink will be typeset at the beginning of the indented paragraph even
on hyperlink-supporting devices.

Font style macros
The man macro package is limited in its font styling options, offering only bold (.B),
italic (.I), and roman. Italic text is usually set underscored instead on terminal
devices. The .SM and .SB macros set text in roman or bold, respectively, at a smaller
type size; these differ visually from regular-sized roman or bold text only on typesetting
devices. It is often necessary to set text in different styles without intervening space.
The macros .BI, .BR, .IB, .IR, .RB, and .RI, where “B”, “I”, and “R” indicate bold,
italic, and roman, respectively, set their odd- and even-numbered arguments in alternating
styles, with no space separating them.

The default type size and family for typesetting devices is 10-point Times, except on the
X75-12 and X100-12 devices where the type size is 12 points. The default style is roman.

.B [text]
Set text in bold. If no argument is given, a one-line input trap is planted; text
on the next line, which can be further formatted with a macro, is set in bold.

.I [text]
Set text in an italic or oblique face. If no argument is given, a one-line input
trap is planted; text on the next line, which can be further formatted with a
macro, is set in an italic or oblique face.

.SM [text]
Set text one point smaller than the default type size on typesetting devices. If
no argument is given, a one-line input trap is planted; text on the next line,
which can be further formatted with a macro, is set smaller.

.SB [text]
Set text in bold and (on typesetting devices) one point smaller than the default
type size. If no argument is given, a one-line input trap is planted; text on the
next line, which can be further formatted with a macro, is set smaller and in bold.
This macro is an extension introduced in SunOS 4.0.

Unlike the above font style macros, the font style alternation macros below set no input
traps; they must be given arguments to have effect. Italic corrections are applied as
appropriate.

.BI bold-text italic-text ...
Set each argument in bold and italics, alternately.

.BR bold-text roman-text ...
Set each argument in bold and roman, alternately.

.IB italic-text bold-text ...
Set each argument in italics and bold, alternately.

.IR italic-text roman-text ...
Set each argument in italics and roman, alternately.

.RB roman-text bold-text ...
Set each argument in roman and bold, alternately.

.RI roman-text italic-text ...
Set each argument in roman and italics, alternately.

Horizontal and vertical spacing
The indentation argument accepted by .IP, .TP, and the deprecated .HP is a number plus an
optional scaling unit, as is .RS's inset-amount. If no scaling unit is given, the man
package assumes “n”. An indentation specified in a call to .IP, .TP, or the deprecated
.HP persists until (1) another of these macros is called with an indentation argument, or
(2) .SH, .SS, or .P or its synonyms is called; these clear the indentation entirely.

The left margin used by ordinary paragraphs set with .P (and its synonyms) not within an
.RS/.RE relative inset is 7.2n for typesetting devices and 7n for terminal devices (but
see the -rIN option). Headers, footers (both set with .TH), and section headings (.SH)
are set at the page offset (see groff(7)) and subsection headings (.SS) indented from it
by 3n (but see the -rSN option).

Several macros insert vertical space: .SH, .SS, .TP, .P (and its synonyms), .IP, and the
deprecated .HP. The default inter-section and inter-paragraph spacing is is 1v for
terminal devices and 0.4v for typesetting devices. (The deprecated macro .PD can change
this vertical spacing, but its use is discouraged.) Between .EX and .EE calls, the inter-
paragraph spacing is 1v regardless of output device.

Registers
Registers are described in section “Options” below. They can be set not only on the
command line but in the site man.local file as well; see section “Files” below.

Strings
The following strings are defined for use in man pages. None of these is necessary in a
contemporary man page; see groff_man_style(7). Others are supported for configuration of
rendering parameters; see section “Options” below.

\*R interpolates a special character escape sequence for the “registered sign” glyph,
\(rg, if available, and “(Reg.)” otherwise.

\*S interpolates an escape sequence setting the type size to the document default.

\*(lq
\*(rq interpolate special character escape sequences for left and right double-quotation
marks, \(lq and \(rq, respectively.

\*(Tm interpolates a special character escape sequence for the “trade mark sign” glyph,
\(tm, if available, and “(TM)” otherwise.

Hooks
Two macros, both GNU extensions, are called internally by the groff man package to format
page headers and footers and can be redefined by the administrator in a site's man.local
file (see section “Files” below). The presentation of .TH above describes the default
headers and footers. Because these macros are hooks for groff man internals, man pages
have no reason to call them. Such hook definitions will likely consist of “.sp” and “.tl”
requests. They must also increase the page length with “.pl” requests in continuous
rendering mode; .PT furthermore has the responsibility of emitting a PDF bookmark after
writing the first page header in a document. Consult the existing implementations in
an.tmac when drafting replacements.

.BT Set the page footer text (“bottom trap”).

.PT Set the page header text (“page trap”).

To remove a page header or footer entirely, define the appropriate macro as empty rather
than deleting it.

Deprecated features
Use of the following in man pages for public distribution is discouraged.

.AT [system [release]]
Alter the footer for use with legacy AT&T man pages, overriding any definition of
the footer-inside argument to .TH. This macro exists only to render man pages from
historical systems.

system can be any of the following.

3 7th edition (default)

4 System III

5 System V

The optional release argument specifies the release number, as in “System V
Release 3”.

.DT Reset tab stops to the default (every 0.5i).

Use of this presentation-oriented macro is deprecated. It translates poorly to
HTML, under which exact space control and tabulation are not readily available.
Thus, information or distinctions that you use tab stops to express are likely to
be lost. If you feel tempted to change the tab stops such that calling this macro
later is desirable to restore them, you should probably be composing a table using
tbl(1) instead.

.HP [indentation]
Set up a paragraph with a hanging left indentation. The indentation argument, if
present, is handled as with .TP.

Use of this presentation-oriented macro is deprecated. A hanging indentation
cannot be expressed naturally under HTML, and non-roff-based man page interpreters
may treat .HP as an ordinary paragraph. Thus, information or distinctions you mean
to express with indentation may be lost.

.OP option-name [option-argument]
Indicate an optional command parameter called option-name, which is set in bold.
If the option takes an argument, specify option-argument using a noun,
abbreviation, or hyphenated noun phrase. If present, option-argument is preceded
by a space and set in italics. Square brackets in roman surround both arguments.

Use of this quasi-semantic macro, an extension originating in Documenter's
Workbench troff, is deprecated. It cannot easily be used to annotate options that
take optional arguments or options whose arguments have internal structure (such as
a mixture of literal and variable components). One could work around these
limitations with font selection escape sequences, but it is preferable to use font
style alternation macros, which afford greater flexibility.

.PD [vertical-space]
Define the vertical space between paragraphs or (sub)sections. The optional
argument vertical-space specifies the amount; the default scaling unit is “v”.
Without an argument, the spacing is reset to its default value; see subsection
“Horizontal and vertical spacing” above.

Use of this presentation-oriented macro is deprecated. It translates poorly to
HTML, under which exact control of inter-paragraph spacing is not readily
available. Thus, information or distinctions that you use .PD to express are
likely to be lost.

.UC [version]
Alter the footer for use with legacy BSD man pages, overriding any definition of
the footer-inside argument to .TH. This macro exists only to render man pages from
historical systems.

version can be any of the following.

3 3rd Berkeley Distribution (default)

4 4th Berkeley Distribution

5 4.2 Berkeley Distribution

6 4.3 Berkeley Distribution

7 4.4 Berkeley Distribution

History
M. Douglas McIlroy ⟨m.douglas.mcilroy@dartmouth.edu⟩ designed, implemented, and documented
the AT&T man macros for Unix Version 7 (1979) and employed them to edit the first volume
of its Programmer's Manual, a compilation of all man pages supplied by the system. That
man supported the macros listed in this page not described as extensions, except .P and
the deprecated .AT and .UC. The only strings defined were R and S; no registers were
documented.

.UC appeared in 3BSD (1980). Unix System III (1980) introduced .P and exposed the
registers IN and LL, which had been internal to Seventh Edition Unix man. PWB/UNIX 2.0
(1980) added the Tm string. 4BSD (1980) added lq and rq strings. SunOS 2.0 (1985)
recognized C, D, P, and X registers. 4.3BSD (1986) added .AT and .P. Ninth Edition
Research Unix (1986) introduced .EX and .EE. SunOS 4.0 (1988) added .SB.

The foregoing features were what James Clark implemented in early versions of groff.
Later, groff 1.20 (2009) originated .SY/.YS, .TQ, .MT/.ME, and .UR/.UE. Plan 9 from User
Space's troff introduced .MR in 2020.

Options

The following groff options set registers (with -r) and strings (with -d) recognized and
used by the man macro package. To ensure rendering consistent with output device
capabilities and reader preferences, man pages should never manipulate them.

-dAD=adjustment-mode
Set line adjustment to adjustment-mode, which is typically “b” for adjustment to
both margins (the default), or “l” for left alignment (ragged right margin). Any
valid argument to groff's “.ad” request may be used. See groff(7) for less-common
choices.

-rcR=1 Enable continuous rendering. Output is not paginated; instead, one (potentially
very long) page is produced. This is the default for terminal and HTML devices.
Use -rcR=0 to disable it on terminal devices; on HTML devices, it cannot be
disabled.

-rC1 Number output pages consecutively, in strictly increasing sequence, rather than
resetting the page number to 1 (or the value of register P) with each new man
document.

-rCS=1 Set section headings (the argument(s) to .SH) in full capitals. This
transformation is off by default because it discards case distinction information.

-rCT=1 Set the man page topic (the first argument to .TH) in full capitals in headers and
footers. This transformation is off by default because it discards case
distinction information.

-rD1 Enable double-sided layout, formatting footers for even and odd pages differently;
see the description of .TH in subsection “Document structure macros” above.

-rFT=footer-distance
Set distance of the footer relative to the bottom of the page to footer-distance;
this amount is always negative. At one half-inch above this location, the page
text is broken before writing the footer. Ignored if continuous rendering is
enabled. The default is -0.5i.

-dHF=heading-font
Set the font used for section and subsection headings; the default is “B” (bold
style of the default family). Any valid argument to groff's “.ft” request may be
used. See groff(7).

-rHY=0 Disable automatic hyphenation. Normally, it is enabled (1). The hyphenation mode
is determined by the groff locale; see section “Localization“ of groff(7).

-rIN=standard-indentation
Set the amount of indentation used for ordinary paragraphs (.P and its synonyms)
and the default indentation amount used by .IP, .RS, .TP, and the deprecated .HP.
See subsection “Horizontal and vertical spacing” above for the default. For
terminal devices, standard-indentation should always be an integer multiple of unit
“n” to get consistent indentation.

-rLL=line-length
Set line length; the default is 78n for terminal devices and 6.5i for typesetting
devices.

-rLT=title-length
Set the line length for titles. By default, it is set to the line length (see -rLL
above).

-dMF=man-page-topic-font
Set the font used for man page topics named in .TH and .MR calls; the default is
“I” (italic style of the default family). Any valid argument to groff's “.ft”
request may be used. If the MF string ends in “I”, it is assumed to be an oblique
typeface, and italic corrections are applied before and after man page topics.

-rPn Start enumeration of pages at n. The default is 1.

-rStype-size
Use type-size for the document's body text; acceptable values are 10, 11, or 12
points. See subsection “Font style macros” above for the default.

-rSN=subsection-indentation
Set indentation of subsection headings to subsection-indentation. See subsection
“Horizontal and vertical spacing” above for the default.

-rU1 Enable generation of URI hyperlinks in the grohtml and grotty output drivers.
grohtml enables them by default; grotty does not, pending more widespread pager
support for OSC 8 escape sequences. Use -rU0 to disable hyperlinks; this will make
the arguments to MT and UR calls visible in the document text produced by link-
capable drivers.

-rXp Number successors of page p as pa, pb, pc, and so forth. The register tracking the
suffixed page letter uses format “a” (see the “.af” request in groff(7)).

Files

       /usr/share/groff/1.23.0/tmac/an.tmac
              Most  man  macros  are  defined  in  this  file.   It  also  loads  extensions from
              an-ext.tmac (see below).

       /usr/share/groff/1.23.0/tmac/andoc.tmac
              This brief groff program detects whether the man or mdoc  macro  package  is  being
              used by a document and loads the correct macro definitions, taking advantage of the
              fact that pages using them must call .TH or .Dd,  respectively,  before  any  other
              macros.   A  man  program or user typing, for example, “groff -mandoc page.1”, need
              not know which package the file page.1 uses.  Multiple man pages, in either format,
              can be handled; andoc reloads each macro package as necessary.

       /usr/share/groff/1.23.0/tmac/an-ext.tmac
              Except  for  .SB, definitions of macros described above as extensions are contained
              in this file; in some cases, they are simpler versions of definitions appearing  in
              an.tmac,  and  are  ignored  if the formatter is GNU troff.  They are written to be
              compatible with AT&T troff and permissively licensed—not copylefted.  To reduce the
              risk  of  name space collisions, string and register names begin only with “m”.  We
              encourage man page authors who are  concerned  about  portability  to  legacy  Unix
              systems  to  copy  these  definitions  into  their  pages, and maintainers of troff
              implementations or work-alike systems that format man pages to re-use them.

              The definitions for these macros are read after a page  calls  .TH,  so  they  will
              replace  any  macros  of the same names preceding it in your file.  If you use your
              own implementations of these macros, they must be defined after .TH  is  called  to
              have  any  effect.  Furthermore, it is wise to define such page-local macros (if at
              all)  after  the  “Name”  section  to  accommodate  timid   makewhatis   or   mandb
              implementations that may give up their scan for indexing material early.

       /usr/share/groff/1.23.0/tmac/man.tmac
              This is a wrapper that loads an.tmac.

       /usr/share/groff/1.23.0/tmac/mandoc.tmac
              This is a wrapper that loads andoc.tmac.

       /usr/share/groff/site-tmac/man.local
              Put site-local changes and customizations into this file.

Authors