Provided by: mandoc_1.14.3-3_amd64 
NAME
man - legacy formatting language for manual pages
DESCRIPTION
Traditionally, the man language has been used to write UNIX manuals for the man(1)
utility. It supports limited control of presentational details like fonts, indentation
and spacing. This reference document describes the structure of manual pages and the
syntax and usage of the man language.
Do not use man to write your manuals: It lacks support for semantic markup. Use the
mdoc(7) language, instead.
In a man document, lines beginning with the control character ‘.’ are called macro lines.
The first word is the macro name. It usually consists of two capital letters. For a list
of available macros, see MACRO OVERVIEW. The words following the macro name are arguments
to the macro.
Lines not beginning with the control character are called text lines. They provide free-
form text to be printed; the formatting of the text depends on the respective processing
context:
.SH Macro lines change control state.
Text lines are interpreted within the current state.
Many aspects of the basic syntax of the man language are based on the roff(7) language;
see the LANGUAGE SYNTAX and MACRO SYNTAX sections in the roff(7) manual for details, in
particular regarding comments, escape sequences, whitespace, and quoting.
MANUAL STRUCTURE
Each man document must contain the TH macro describing the document's section and title.
It may occur anywhere in the document, although conventionally it appears as the first
macro.
Beyond TH, at least one macro or text line must appear in the document.
The following is a well-formed skeleton man file for a utility "progname":
.TH PROGNAME 1 2009-10-10
.SH NAME
\fBprogname\fR \(en one line about what it does
.\" .SH LIBRARY
.\" For sections 2, 3, and 9 only.
.\" Not used in OpenBSD.
.SH SYNOPSIS
\fBprogname\fR [\fB\-options\fR] \fIfile ...\fR
.SH DESCRIPTION
The \fBfoo\fR utility processes files ...
.\" .Sh CONTEXT
.\" For section 9 functions only.
.\" .SH IMPLEMENTATION NOTES
.\" Not used in OpenBSD.
.\" .SH RETURN VALUES
.\" For sections 2, 3, and 9 function return values only.
.\" .SH ENVIRONMENT
.\" For sections 1, 6, 7, and 8 only.
.\" .SH FILES
.\" .SH EXIT STATUS
.\" For sections 1, 6, and 8 only.
.\" .SH EXAMPLES
.\" .SH DIAGNOSTICS
.\" For sections 1, 4, 6, 7, 8, and 9 printf/stderr messages only.
.\" .SH ERRORS
.\" For sections 2, 3, 4, and 9 errno settings only.
.\" .SH SEE ALSO
.\" .BR foobar ( 1 )
.\" .SH STANDARDS
.\" .SH HISTORY
.\" .SH AUTHORS
.\" .SH CAVEATS
.\" .SH BUGS
.\" .SH SECURITY CONSIDERATIONS
.\" Not used in OpenBSD.
The sections in a man document are conventionally ordered as they appear above. Sections
should be composed as follows:
NAME
The name(s) and a short description of the documented material. The syntax for this
is generally as follows:
\fBname\fR \(en description
LIBRARY
The name of the library containing the documented material, which is assumed to be a
function in a section 2 or 3 manual. For functions in the C library, this may be as
follows:
Standard C Library (libc, -lc)
SYNOPSIS
Documents the utility invocation syntax, function call syntax, or device
configuration.
For the first, utilities (sections 1, 6, and 8), this is generally structured as
follows:
\fBname\fR [-\fBab\fR] [-\fBc\fR\fIarg\fR] \fBpath\fR...
For the second, function calls (sections 2, 3, 9):
.B char *name(char *\fIarg\fR);
And for the third, configurations (section 4):
.B name* at cardbus? function
?
Manuals not in these sections generally don't need a SYNOPSIS.
DESCRIPTION
This expands upon the brief, one-line description in NAME. It usually contains a
break-down of the options (if documenting a command).
CONTEXT
This section lists the contexts in which functions can be called in section 9. The
contexts are autoconf, process, or interrupt.
IMPLEMENTATION NOTES
Implementation-specific notes should be kept here. This is useful when implementing
standard functions that may have side effects or notable algorithmic implications.
RETURN VALUES
This section documents the return values of functions in sections 2, 3, and 9.
ENVIRONMENT
Documents any usages of environment variables, e.g., environ(7).
FILES
Documents files used. It's helpful to document both the file name and a short
description of how the file is used (created, modified, etc.).
EXIT STATUS
This section documents the command exit status for section 1, 6, and 8 utilities.
Historically, this information was described in DIAGNOSTICS, a practise that is now
discouraged.
EXAMPLES
Example usages. This often contains snippets of well-formed, well-tested
invocations. Make sure that examples work properly!
DIAGNOSTICS
Documents error conditions. In section 4 and 9 manuals, these are usually messages
printed by the kernel to the console and to the kernel log. In section 1, 6, 7, and
8, these are usually messages printed by userland programs to the standard error
output.
Historically, this section was used in place of EXIT STATUS for manuals in sections
1, 6, and 8; however, this practise is discouraged.
ERRORS
Documents errno(2) settings in sections 2, 3, 4, and 9.
SEE ALSO
References other manuals with related topics. This section should exist for most
manuals.
.BR bar ( 1 ),
Cross-references should conventionally be ordered first by section, then
alphabetically.
STANDARDS
References any standards implemented or used, such as
IEEE Std 1003.2 (\(lqPOSIX.2\(rq)
If not adhering to any standards, the HISTORY section should be used.
HISTORY
A brief history of the subject, including where support first appeared.
AUTHORS
Credits to the person or persons who wrote the code and/or documentation. Authors
should generally be noted by both name and email address.
CAVEATS
Common misuses and misunderstandings should be explained in this section.
BUGS
Known bugs, limitations, and work-arounds should be described in this section.
SECURITY CONSIDERATIONS
Documents any security precautions that operators should consider.
MACRO OVERVIEW
This overview is sorted such that macros of similar purpose are listed together, to help
find the best macro for any given purpose. Deprecated macros are not included in the
overview, but can be found in the alphabetical reference below.
Page header and footer meta-data
TH set the title: title section date [source [volume]]
AT display AT&T UNIX version in the page footer (<= 1 argument)
UC display BSD version in the page footer (<= 1 argument)
Sections and paragraphs
SH section header (one line)
SS subsection header (one line)
PP, LP, P start an undecorated paragraph (no arguments)
RS, RE reset the left margin: [width]
IP indented paragraph: [head [width]]
TP tagged paragraph: [width]
HP hanged paragraph: [width]
PD set vertical paragraph distance: [height]
fi, nf fill mode and no-fill mode (no arguments)
in additional indent: [width]
Physical markup
B boldface font
I italic font
R roman (default) font
SB small boldface font
SM small roman font
BI alternate between boldface and italic fonts
BR alternate between boldface and roman fonts
IB alternate between italic and boldface fonts
IR alternate between italic and roman fonts
RB alternate between roman and boldface fonts
RI alternate between roman and italic fonts
MACRO REFERENCE
This section is a canonical reference to all macros, arranged alphabetically. For the
scoping of individual macros, see MACRO SYNTAX.
AT
Sets the volume for the footer for compatibility with man pages from AT&T UNIX releases.
The optional arguments specify which release it is from.
B
Text is rendered in bold face.
See also I and R.
BI
Text is rendered alternately in bold face and italic. Thus, ‘.BI this word and that’
causes ‘this’ and ‘and’ to render in bold face, while ‘word’ and ‘that’ render in italics.
Whitespace between arguments is omitted in output.
Examples:
.BI bold italic bold italic
The output of this example will be emboldened bold and italicised italic, with spaces
stripped between arguments.
See also IB, BR, RB, RI, and IR.
BR
Text is rendered alternately in bold face and roman (the default font). Whitespace
between arguments is omitted in output.
See BI for an equivalent example.
See also BI, IB, RB, RI, and IR.
DT
Restore the default tabulator positions. They are at intervals of 0.5 inches. This has
no effect unless the tabulator positions were changed with the roff(7) ta request.
EE
This is a non-standard GNU extension, included only for compatibility. In mandoc(1), it
does the same as fi.
EX
This is a non-standard GNU extension, included only for compatibility. In mandoc(1), it
does the same as nf.
HP
Begin a paragraph whose initial output line is left-justified, but subsequent output lines
are indented, with the following syntax:
[width]
The width argument is a roff(7) scaling width. If specified, it's saved for later
paragraph left-margins; if unspecified, the saved or default width is used.
See also IP, LP, P, PP, and TP.
I
Text is rendered in italics.
See also B and R.
IB
Text is rendered alternately in italics and bold face. Whitespace between arguments is
omitted in output.
See BI for an equivalent example.
See also BI, BR, RB, RI, and IR.
IP
Begin an indented paragraph with the following syntax:
[head [width]]
The width argument is a roff(7) scaling width defining the left margin. It's saved for
later paragraph left-margins; if unspecified, the saved or default width is used.
The head argument is used as a leading term, flushed to the left margin. This is useful
for bulleted paragraphs and so on.
See also HP, LP, P, PP, and TP.
IR
Text is rendered alternately in italics and roman (the default font). Whitespace between
arguments is omitted in output.
See BI for an equivalent example.
See also BI, IB, BR, RB, and RI.
LP
Begin an undecorated paragraph. The scope of a paragraph is closed by a subsequent
paragraph, sub-section, section, or end of file. The saved paragraph left-margin width is
reset to the default.
See also HP, IP, P, PP, and TP.
ME
End a mailto block. This is a non-standard GNU extension, included only for
compatibility. See MT.
MT
Begin a mailto block. This is a non-standard GNU extension, included only for
compatibility. It has the following syntax:
link description to be shown
⟨⟩
OP
Optional command-line argument. This is a non-standard GNU extension, included only for
compatibility. It has the following syntax:
key [value]
The key is usually a command-line flag and value its argument.
P
Synonym for LP.
See also HP, IP, LP, PP, and TP.
PD
Specify the vertical space to be inserted before each new paragraph.
The syntax is as follows:
[height]
The height argument is a roff(7) scaling width. It defaults to 1v. If the unit is
omitted, v is assumed.
This macro affects the spacing before any subsequent instances of HP, IP, LP, P, PP, SH,
SS, and TP.
PP
Synonym for LP.
See also HP, IP, LP, P, and TP.
R
Text is rendered in roman (the default font).
See also I and B.
RB
Text is rendered alternately in roman (the default font) and bold face. Whitespace
between arguments is omitted in output.
See BI for an equivalent example.
See also BI, IB, BR, RI, and IR.
RE
Explicitly close out the scope of a prior RS. The default left margin is restored to the
state before that RS invocation.
The syntax is as follows:
[level]
Without an argument, the most recent RS block is closed out. If level is 1, all open RS
blocks are closed out. Otherwise, level − 1 nested RS blocks remain open.
RI
Text is rendered alternately in roman (the default font) and italics. Whitespace between
arguments is omitted in output.
See BI for an equivalent example.
See also BI, IB, BR, RB, and IR.
RS
Temporarily reset the default left margin. This has the following syntax:
[width]
The width argument is a roff(7) scaling width. If not specified, the saved or default
width is used.
See also RE.
SB
Text is rendered in small size (one point smaller than the default font) bold face.
SH
Begin a section. The scope of a section is only closed by another section or the end of
file. The paragraph left-margin width is reset to the default.
SM
Text is rendered in small size (one point smaller than the default font).
SS
Begin a sub-section. The scope of a sub-section is closed by a subsequent sub-section,
section, or end of file. The paragraph left-margin width is reset to the default.
TH
Sets the title of the manual page for use in the page header and footer with the following
syntax:
title section date [source [volume]]
Conventionally, the document title is given in all caps. The recommended date format is
YYYY-MM-DD as specified in the ISO-8601 standard; if the argument does not conform, it is
printed verbatim. If the date is empty or not specified, the current date is used. The
optional source string specifies the organisation providing the utility. When
unspecified, mandoc(1) uses its -Ios argument. The volume string replaces the default
rendered volume, which is dictated by the manual section.
Examples:
.TH CVS 5 1992-02-12 GNU
TP
Begin a paragraph where the head, if exceeding the indentation width, is followed by a
newline; if not, the body follows on the same line after a buffer to the indentation
width. Subsequent output lines are indented. The syntax is as follows:
[width]
The width argument is a roff(7) scaling width. If specified, it's saved for later
paragraph left-margins; if unspecified, the saved or default width is used.
See also HP, IP, LP, P, and PP.
UC
Sets the volume for the footer for compatibility with man pages from BSD releases. The
optional first argument specifies which release it is from.
UE
End a uniform resource identifier block. This is a non-standard GNU extension, included
only for compatibility. See UE.
UR
Begin a uniform resource identifier block. This is a non-standard GNU extension, included
only for compatibility. It has the following syntax:
link description to be shown
⟨⟩
fi
End literal mode begun by nf.
in
Indent relative to the current indentation:
If width is signed, the new offset is relative. Otherwise, it is absolute. This value is
reset upon the next paragraph, section, or sub-section.
nf
Begin literal mode: all subsequent free-form lines have their end of line boundaries
preserved. May be ended by fi. Literal mode is implicitly ended by SH or SS.
MACRO SYNTAX
The man macros are classified by scope: line scope or block scope. Line macros are only
scoped to the current line (and, in some situations, the subsequent line). Block macros
are scoped to the current line and subsequent lines until closed by another block macro.
Line Macros
Line macros are generally scoped to the current line, with the body consisting of zero or
more arguments. If a macro is scoped to the next line and the line arguments are empty,
the next line, which must be text, is used instead. Thus:
.I
foo
is equivalent to ‘.I foo’. If next-line macros are invoked consecutively, only the last
is used. If a next-line macro is followed by a non-next-line macro, an error is raised.
The syntax is as follows:
.YO [body...]
[body...]
Macro Arguments Scope Notes
AT <=1 current
B n next-line
BI n current
BR n current
DT 0 current
EE 0 current compat
EX 0 current compat
I n next-line
IB n current
IR n current
OP 0, 1 current compat
PD 1 current
R n next-line
RB n current
RI n current
SB n next-line
SM n next-line
TH >1, <6 current
UC <=1 current
fi 0 current compat
in 1 current compat
nf 0 current compat
Macros marked as "compat" are included for compatibility with the significant corpus of
existing manuals that mix dialects of roff. These macros should not be used for portable
man manuals.
Block Macros
Block macros comprise a head and body. As with in-line macros, the head is scoped to the
current line and, in one circumstance, the next line (the next-line stipulations as in
Line Macros apply here as well).
The syntax is as follows:
.YO [head...]
[head...]
[body...]
The closure of body scope may be to the section, where a macro is closed by SH; sub-
section, closed by a section or SS; part, closed by a section, sub-section, or RE; or
paragraph, closed by a section, sub-section, part, HP, IP, LP, P, PP, or TP. No closure
refers to an explicit block closing macro.
As a rule, block macros may not be nested; thus, calling a block macro while another block
macro scope is open, and the open scope is not implicitly closed, is syntactically
incorrect.
Macro Arguments Head Scope Body Scope Notes
HP <2 current paragraph
IP <3 current paragraph
LP 0 current paragraph
P 0 current paragraph
PP 0 current paragraph
RE 0 current none compat
RS 1 current part compat
SH >0 next-line section
SS >0 next-line sub-section
TP n next-line paragraph
UE 0 current none compat
UR 1 current part compat
Macros marked "compat" are as mentioned in Line Macros.
If a block macro is next-line scoped, it may only be followed by in-line macros for
decorating text.
Font handling
In man documents, both Physical markup macros and roff(7) ‘\f’ font escape sequences can
be used to choose fonts. In text lines, the effect of manual font selection by escape
sequences only lasts until the next macro invocation; in macro lines, it only lasts until
the end of the macro scope. Note that macros like BR open and close a font scope for each
argument.
SEE ALSO
man(1), mandoc(1), eqn(7), mandoc_char(7), mdoc(7), roff(7), tbl(7)
HISTORY
The man language first appeared as a macro package for the roff typesetting system in
Version 7 AT&T UNIX. It was later rewritten by James Clark as a macro package for groff.
Eric S. Raymond wrote the extended man macros for groff in 2007. The stand-alone
implementation that is part of the mandoc(1) utility written by Kristaps Dzonsons appeared
in OpenBSD 4.6.
AUTHORS
This man reference was written by Kristaps Dzonsons <kristaps@bsd.lv>.
CAVEATS
Do not use this language. Use mdoc(7), instead.