MDOC(7) | Miscellaneous Information Manual | MDOC(7) |
mdoc - semantic markup language for formatting manual pages
The mdoc language supports authoring of manual pages for the man(1) utility by allowing semantic annotations of words, phrases, page sections and complete manual pages. Such annotations are used by formatting tools to achieve a uniform presentation across all manuals written in mdoc, and to support hyperlinking if supported by the output medium.
This reference document describes the structure of manual pages and the syntax and usage of the mdoc language. The reference implementation of a parsing and formatting tool is mandoc(1); the COMPATIBILITY section describes compatibility with other implementations.
In an mdoc document, lines beginning with the control character ‘.’ are called “macro lines”. The first word is the macro name. It consists of two or three letters. Most macro names begin with a capital letter. For a list of available macros, see MACRO OVERVIEW. The words following the macro name are arguments to the macro, optionally including the names of other, callable macros; see MACRO SYNTAX for details.
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 mdoc 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. However, using roff(7) requests in mdoc documents is discouraged; mandoc(1) supports some of them merely for backward compatibility.
A well-formed mdoc document consists of a document prologue followed by one or more sections.
The prologue, which consists of the Dd, Dt, and Os macros in that order, is required for every document.
The first section (sections are denoted by Sh) must be the NAME section, consisting of at least one Nm followed by Nd.
Following that, convention dictates specifying at least the SYNOPSIS and DESCRIPTION sections, although this varies between manual sections.
The following is a well-formed skeleton mdoc file for a utility "progname":
.Dd $Mdocdate$ .Dt PROGNAME section .Os .Sh NAME .Nm progname .Nd one line about what it does .\" .Sh LIBRARY .\" For sections 2, 3, and 9 only. .\" Not used in OpenBSD. .Sh SYNOPSIS .Nm progname .Op Fl options .Ar .Sh DESCRIPTION The .Nm 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 .\" .Xr foobar 1 .\" .Sh STANDARDS .\" .Sh HISTORY .\" .Sh AUTHORS .\" .Sh CAVEATS .\" .Sh BUGS .\" .Sh SECURITY CONSIDERATIONS .\" Not used in OpenBSD.
The sections in an mdoc document are conventionally ordered as they appear above. Sections should be composed as follows:
NAME
The name(s) and a one line description of the documented material. The syntax
for this as follows:
.Nm name0 , .Nm name1 , .Nm name2 .Nd a one line description
Multiple ‘Nm’ names should be separated by commas.
The Nm macro(s) must precede the Nd macro.
See Nm and Nd.
LIBRARY
The name of the library containing the documented material, which is assumed
to be a function in a section 2, 3, or 9 manual. The syntax for this is as
follows:
.Lb libarm
See Lb.
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:
.Nm bar .Op Fl v .Op Fl o Ar file .Op Ar .Nm foo .Op Fl v .Op Fl o Ar file .Op Ar
Commands should be ordered alphabetically.
For the second, function calls (sections 2, 3, 9):
.In header.h .Vt extern const char *global; .Ft "char *" .Fn foo "const char *src" .Ft "char *" .Fn bar "const char *src"
Ordering of In, Vt, Fn, and Fo macros should follow C header-file conventions.
And for the third, configurations (section 4):
.Cd "it* at isa? port 0x2e" .Cd "it* at isa? port 0x4e"
Manuals not in these sections generally don't need a SYNOPSIS.
Some macros are displayed differently in the SYNOPSIS section, particularly Nm, Cd, Fd, Fn, Fo, In, Vt, and Ft. All of these macros are output on their own line. If two such dissimilar macros are pairwise invoked (except for Ft before Fo or Fn), they are separated by a vertical space, unless in the case of Fo, Fn, and Ft, which are always separated by vertical space.
When text and macros following an Nm macro starting an input line span multiple output lines, all output lines but the first will be indented to align with the text immediately following the Nm macro, up to the next Nm, Sh, or Ss macro or the end of an enclosing block, whichever comes first.
DESCRIPTION
This begins with an expansion of the brief, one line description in
NAME:
The .Nm utility does this, that, and the other.
It usually follows with a breakdown of the options (if documenting a command), such as:
The arguments are as follows: .Bl -tag -width Ds .It Fl v Print verbose information. .El
List the options in alphabetical order, uppercase before lowercase for each letter and with no regard to whether an option takes an argument. Put digits in ascending order before all letter options.
Manuals not documenting a command won't include the above fragment.
Since the DESCRIPTION section usually contains most of the text of a manual, longer manuals often use the Ss macro to form subsections. In very long manuals, the DESCRIPTION may be split into multiple sections, each started by an Sh macro followed by a non-standard section name, and each having several subsections, like in the present mdoc manual.
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.
See Rv.
ENVIRONMENT
Lists the environment variables used by the utility, and explains the syntax
and semantics of their values. The environ(7) manual provides examples of
typical content and formatting.
See Ev.
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.).
See Pa.
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.
See Ex.
EXAMPLES
Example usages. This often contains snippets of well-formed, well-tested
invocations. Make sure that examples work properly!
DIAGNOSTICS
Documents error messages. 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.
See Bl -diag.
ERRORS
Documents errno(2) settings in sections 2, 3, 4, and 9.
See Er.
SEE ALSO
References other manuals with related topics. This section should exist for
most manuals. Cross-references should conventionally be ordered first by
section, then alphabetically (ignoring case).
References to other documentation concerning the topic of the manual page, for example authoritative books or journal articles, may also be provided in this section.
See Rs and Xr.
STANDARDS
References any standards implemented or used. If not adhering to any
standards, the HISTORY section should be used instead.
See St.
HISTORY
A brief history of the subject, including where it was first implemented, and
when it was ported to or reimplemented for the operating system at hand.
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.
See An.
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.
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 below in the alphabetical MACRO REFERENCE.
Dd | document date: $Mdocdate$ | month day, year |
Dt | document title: TITLE section [arch] |
Os | operating system version: [system [version]] |
Nm | document name (one argument) |
Nd | document description (one line) |
Sh | section header (one line) |
Ss | subsection header (one line) |
Sx | internal cross reference to a section or subsection |
Xr | cross reference to another manual page: name section |
Pp, Lp | start a text paragraph (no arguments) |
Bd, Ed | display block: |
-type | |
[-offset width] | |
[-compact] | |
D1 | indented display (one line) |
Dl | indented literal display (one line) |
Ql | in-line literal display: ‘text’ |
Bl, El | list block: |
-type | |
[-width val] | |
[-offset val] | |
[-compact] | |
It | list item (syntax depends on -type) |
Ta | table cell separator in Bl -column lists |
Rs, %*, Re | bibliographic block (references) |
Pf | prefix, no following horizontal space (one argument) |
Ns | roman font, no preceding horizontal space (no arguments) |
Ap | apostrophe without surrounding whitespace (no arguments) |
Sm | switch horizontal spacing mode: [on | off] |
Bk, Ek | keep block: -words |
Nm | start a SYNOPSIS block with the name of a utility |
Fl | command line options (flags) (>=0 arguments) |
Cm | command modifier (>0 arguments) |
Ar | command arguments (>=0 arguments) |
Op, Oo, Oc | optional syntax elements (enclosure) |
Ic | internal or interactive command (>0 arguments) |
Ev | environmental variable (>0 arguments) |
Pa | file system path (>=0 arguments) |
Lb | function library (one argument) |
In | include file (one argument) |
Fd | other preprocessor directive (>0 arguments) |
Ft | function type (>0 arguments) |
Fo, Fc | function block: funcname |
Fn | function name: |
[functype] | |
funcname | |
[[argtype] | |
argname] | |
Fa | function argument (>0 arguments) |
Vt | variable type (>0 arguments) |
Va | variable name (>0 arguments) |
Dv | defined variable or preprocessor constant (>0 arguments) |
Er | error constant (>0 arguments) |
Ev | environmental variable (>0 arguments) |
An | author name (>0 arguments) |
Lk | hyperlink: uri [name] |
Mt | “mailto” hyperlink: address |
Cd | kernel configuration declaration (>0 arguments) |
Ad | memory address (>0 arguments) |
Ms | mathematical symbol (>0 arguments) |
Em | italic font or underline (emphasis) (>0 arguments) |
Sy | boldface font (symbolic) (>0 arguments) |
Li | typewriter font (literal) (>0 arguments) |
No | return to roman font (normal) (no arguments) |
Bf, Ef | font block: |
[-type | Em | Li | Sy] |
Dq, Do, Dc | enclose in typographic double quotes: “text” |
Qq, Qo, Qc | enclose in typewriter double quotes: "text" |
Sq, So, Sc | enclose in single quotes: ‘text’ |
Pq, Po, Pc | enclose in parentheses: (text) |
Bq, Bo, Bc | enclose in square brackets: [text] |
Brq, Bro, Brc | enclose in curly braces: {text} |
Aq, Ao, Ac | enclose in angle brackets: ⟨text⟩ |
Eo, Ec | generic enclosure |
Ex -std | standard command exit values: [utility ...] |
Rv -std | standard function return values: [function ...] |
St | reference to a standards document (one argument) |
At | AT&T UNIX |
Bx | BSD |
Bsx | BSD/OS |
Nx | NetBSD |
Fx | FreeBSD |
Ox | OpenBSD |
Dx | DragonFly |
This section is a canonical reference of all macros, arranged alphabetically. For the scoping of individual macros, see MACRO SYNTAX.
Author name of an Rs block. Multiple authors should each be accorded their own %A line. Author names should be ordered with full or abbreviated forename(s) first, then full surname.
Book title of an Rs block. This macro may also be used in a non-bibliographic context when referring to book titles.
Publication city or location of an Rs block.
Publication date of an Rs block. Recommended formats of arguments are month day, year or just year.
Publisher or issuer name of an Rs block.
Journal name of an Rs block.
Issue number (usually for journals) of an Rs block.
Optional information of an Rs block.
Book or journal page number of an Rs block.
Institutional author (school, government, etc.) of an Rs block. Multiple institutional authors should each be accorded their own %Q line.
Technical report name of an Rs block.
Article title of an Rs block. This macro may also be used in a non-bibliographical context when referring to article titles.
URI of reference document.
Volume number of an Rs block.
Close an Ao block. Does not have any tail arguments.
Memory address. Do not use this for postal addresses.
Examples:
Author name. Can be used both for the authors of the program, function, or driver documented in the manual, or for the authors of the manual itself. Requires either the name of an author or one of the following arguments:
The default is -nosplit. The effect of selecting either of the -split modes ends at the beginning of the AUTHORS section. In the AUTHORS section, the default is -nosplit for the first author listing and -split for all other author listings.
Examples:
Begin a block enclosed by angle brackets. Does not have any head arguments. This macro is almost never useful. See Aq for more details.
Inserts an apostrophe without any surrounding whitespace. This is generally used as a grammatical device when referring to the verb form of a function.
Examples:
Encloses its arguments in angle brackets. The only important use case is for email addresses. See Mt for an example.
Occasionally, it is used for names of characters and keys, for example:
Press the .Aq escape key to ...
For URIs, use Lk instead, and In for “#include” directives. Never wrap Ar in Aq.
Since Aq usually renders with non-ASCII characters in non-ASCII output modes, do not use it where the ASCII characters ‘<’ and ‘>’ are required as syntax elements. Instead, use these characters directly in such cases, combining them with the macros Pf, Ns, or Eo as needed.
See also Ao.
Command arguments. If an argument is not provided, the string “file ...” is used as a default.
Examples:
The arguments to the Ar macro are names and placeholders for command arguments; for fixed strings to be passed verbatim as arguments, use Fl or Cm.
Formats an AT&T UNIX version. Accepts one optional argument:
Note that these arguments do not begin with a hyphen.
Examples:
See also Bsx, Bx, Dx, Fx, Nx, and Ox.
Close a Bo block. Does not have any tail arguments.
Begin a display block. Its syntax is as follows:
Display blocks are used to select a different indentation and justification than the one used by the surrounding text. They may contain both macro lines and text lines. By default, a display block is preceded by a vertical space.
The type must be one of the following:
The type must be provided first. Additional arguments may follow:
One of the pre-defined strings indent, the width of a standard indentation (six constant width characters); indent-two, twice indent; left, which has no effect; right, which justifies to the right margin; or center, which aligns around an imagined center axis.
A macro invocation, which selects a predefined width associated with that macro. The most popular is the imaginary macro Ds, which resolves to 6n.
A scaling width as described in roff(7).
An arbitrary string, which indents by the length of this string.
When the argument is missing, -offset is ignored.
Examples:
.Bd -literal -offset indent -compact
Hello world. .Ed
See also D1 and Dl.
Change the font mode for a scoped block of text. Its syntax is as follows:
The -emphasis and Em argument are equivalent, as are -symbolic and Sy, and -literal and Li. Without an argument, this macro does nothing. The font mode continues until broken by a new font mode in a nested scope or Ef is encountered.
See also Li, Ef, Em, and Sy.
For each macro, keep its output together on the same output line, until the end of the macro or the end of the input line is reached, whichever comes first. Line breaks in text lines are unaffected. The syntax is as follows:
The -words argument is required; additional arguments are ignored.
The following example will not break within each Op macro line:
.Bk -words .Op Fl f Ar flags .Op Fl o Ar output .Ek
Be careful in using over-long lines within a keep block! Doing so will clobber the right margin.
Begin a list. Lists consist of items specified using the It macro, containing a head or a body or both. The list syntax is as follows:
The list type is mandatory and must be specified first. The -width and -offset arguments accept macro names as described for Bd -offset, scaling widths as described in roff(7), or use the length of the given string. The -offset is a global indentation for the whole list, affecting both item heads and bodies. For those list types supporting it, the -width argument requests an additional indentation of item bodies, to be added to the -offset. Unless the -compact argument is specified, list entries are separated by vertical space.
A list must specify one of the following list types:
Lists may be nested within lists and displays. Nesting of -column and -enum lists may not be portable.
See also El and It.
Begin a block enclosed by square brackets. Does not have any head arguments.
Examples:
.Bo 1 , .Dv BUFSIZ Bc
See also Bq.
Encloses its arguments in square brackets.
Examples:
Remarks: this macro is sometimes abused to emulate optional arguments for commands; the correct macros to use for this purpose are Op, Oo, and Oc.
See also Bo.
Close a Bro block. Does not have any tail arguments.
Begin a block enclosed by curly braces. Does not have any head arguments.
Examples:
.Bro 1 , ... , .Va n Brc
See also Brq.
Encloses its arguments in curly braces.
Examples:
See also Bro.
Format the BSD/OS version provided as an argument, or a default value if no argument is provided.
Examples:
See also At, Bx, Dx, Fx, Nx, and Ox.
Supported only for compatibility, do not use this in new manuals. Prints “is currently in beta test.”
Format the BSD version provided as an argument, or a default value if no argument is provided.
Examples:
See also At, Bsx, Dx, Fx, Nx, and Ox.
Kernel configuration declaration. This denotes strings accepted by config(8). It is most often used in section 4 manual pages.
Examples:
Remarks: this macro is commonly abused by using quoted literals to retain whitespace and align consecutive Cd declarations. This practise is discouraged.
Command modifiers. Typically used for fixed strings passed as arguments, unless Fl is more appropriate. Also useful when specifying configuration options or keys.
Examples:
One-line indented display. This is formatted by the default rules and is useful for simple indented statements. It is followed by a newline.
Examples:
See also Bd and Dl.
This macro is obsolete. No replacement is needed. It is ignored by mandoc(1) and groff including its arguments. It was formerly used to toggle a debugging mode.
Close a Do block. Does not have any tail arguments.
Document date for display in the page footer. This is the mandatory first macro of any mdoc manual. Its syntax is as follows:
The month is the full English month name, the day is an integer number, and the year is the full four-digit year.
Other arguments are not portable; the mandoc(1) utility handles them as follows:
Examples:
See also Dt and Os.
One-line indented display. This is formatted as literal text and is useful for commands and invocations. It is followed by a newline.
Examples:
See also Ql, Bd -literal, and D1.
Begin a block enclosed by double quotes. Does not have any head arguments.
Examples:
.Do April is the cruellest month .Dc \(em T.S. Eliot
See also Dq.
Encloses its arguments in “typographic” double-quotes.
Examples:
.Dq April is the cruellest month \(em T.S. Eliot
See also Qq, Sq, and Do.
Document title for display in the page header. This is the mandatory second macro of any mdoc file. Its syntax is as follows:
Its arguments are as follows:
Examples:
See also Dd and Os.
Defined variables such as preprocessor constants, constant symbols, enumeration values, and so on.
Examples:
See also Er and Ev for special-purpose constants, Va for variable symbols, and Fd for listing preprocessor variable definitions in the SYNOPSIS.
Format the DragonFly version provided as an argument, or a default value if no argument is provided.
Examples:
See also At, Bsx, Bx, Fx, Nx, and Ox.
Close a scope started by Eo. Its syntax is as follows:
The TERM argument is used as the enclosure tail, for example, specifying \(rq will emulate Dc.
End a display context started by Bd.
End a font mode context started by Bf.
End a keep context started by Bk.
End a list context started by Bl.
See also Bl and It.
Request an italic font. If the output device does not provide that, underline.
This is most often used for stress emphasis (not to be confused with importance, see Sy). In the rare cases where none of the semantic markup macros fit, it can also be used for technical terms and placeholders, except that for syntax elements, Sy and Ar are preferred, respectively.
Examples:
Selected lines are those .Em not matching any of the specified patterns. Some of the functions use a .Em hold space to save the pattern space for subsequent retrieval.
See also Bf, Li, No, and Sy.
This macro is obsolete. Use Eo or any of the other enclosure macros.
It encloses its argument in the delimiters specified by the last Es macro.
An arbitrary enclosure. Its syntax is as follows:
The TERM argument is used as the enclosure head, for example, specifying \(lq will emulate Do.
Error constants for definitions of the errno libc global variable. This is most often used in section 2 and 3 manual pages.
Examples:
See also Dv for general constants.
This macro is obsolete. Use Eo or any of the other enclosure macros.
It takes two arguments, defining the delimiters to be used by subsequent En macros.
Environmental variables such as those specified in environ(7).
Examples:
See also Dv for general constants.
Insert a standard sentence regarding command exit values of 0 on success and >0 on failure. This is most often used in section 1, 6, and 8 manual pages. Its syntax is as follows:
If utility is not specified, the document's name set by Nm is used. Multiple utility arguments are treated as separate utilities.
See also Rv.
Function argument or parameter. Its syntax is as follows:
Each argument may be a name and a type (recommended for the SYNOPSIS section), a name alone (for function invocations), or a type alone (for function prototypes). If both a type and a name are given or if the type consists of multiple words, all words belonging to the same function argument have to be given in a single argument to the Fa macro.
This macro is also used to specify the field name of a structure.
Most often, the Fa macro is used in the SYNOPSIS within Fo blocks when documenting multi-line function prototypes. If invoked with multiple arguments, the arguments are separated by a comma. Furthermore, if the following macro is another Fa, the last argument will also have a trailing comma.
Examples:
See also Fo.
End a function context started by Fo.
Preprocessor directive, in particular for listing it in the SYNOPSIS. Historically, it was also used to document include files. The latter usage has been deprecated in favour of In.
Its syntax is as follows:
Examples:
See also MANUAL STRUCTURE, In, and Dv.
Command-line flag or option. Used when listing arguments to command-line utilities. Prints a fixed-width hyphen ‘-’ directly followed by each argument. If no arguments are provided, a hyphen is printed followed by a space. If the argument is a macro, a hyphen is prefixed to the subsequent macro output.
Examples:
See also Cm.
A function name. Its syntax is as follows:
Function arguments are surrounded in parenthesis and are delimited by commas. If no arguments are specified, blank parenthesis are output. In the SYNOPSIS section, this macro starts a new output line, and a blank line is automatically inserted between function definitions.
Examples:
.Ft functype .Fn funcname
When referring to a function documented in another manual page, use Xr instead. See also MANUAL STRUCTURE, Fo, and Ft.
Begin a function block. This is a multi-line version of Fn. Its syntax is as follows:
Invocations usually occur in the following context:
A Fo scope is closed by Fc.
See also MANUAL STRUCTURE, Fa, Fc, and Ft.
This macro is obsolete. No replacement markup is needed.
It was used to show numerical function return values in an italic font.
A function type. Its syntax is as follows:
In the SYNOPSIS section, a new output line is started after this macro.
Examples:
.Ft functype .Fn funcname
See also MANUAL STRUCTURE, Fn, and Fo.
Format the FreeBSD version provided as an argument, or a default value if no argument is provided.
Examples:
See also At, Bsx, Bx, Dx, Nx, and Ox.
This macro is not implemented in mandoc(1).
It was used to include the contents of a (header) file literally. The syntax was:
Designate an internal or interactive command. This is similar to Cm but used for instructions rather than values.
Examples:
Note that using Bd -literal or D1 is preferred for displaying code; the Ic macro is used when referring to specific instructions.
The name of an include file. This macro is most often used in section 2, 3, and 9 manual pages.
When invoked as the first macro on an input line in the SYNOPSIS section, the argument is displayed in angle brackets and preceded by "#include", and a blank line is inserted in front if there is a preceding function declaration. In other sections, it only encloses its argument in angle brackets and causes no line break.
Examples:
See also MANUAL STRUCTURE.
A list item. The syntax of this macro depends on the list type.
Lists of type -hang, -ohang, -inset, and -diag have the following syntax:
Lists of type -bullet, -dash, -enum, -hyphen and -item have the following syntax:
with subsequent lines interpreted within the scope of the It until either a closing El or another It.
The -tag list has the following syntax:
Subsequent lines are interpreted as with -bullet and family. The line arguments correspond to the list's left-hand side; body arguments correspond to the list's contents.
The -column list is the most complicated. Its syntax is as follows:
The arguments consist of one or more lines of text and macros representing a complete table line. Cells within the line are delimited by the special Ta block macro or by literal tab characters.
Using literal tabs is strongly discouraged because they are very hard to use correctly and mdoc code using them is very hard to read. In particular, a blank character is syntactically significant before and after the literal tab character. If a word precedes or follows the tab without an intervening blank, that word is never interpreted as a macro call, but always output literally.
The tab cell delimiter may only be used within the It line itself; on following lines, only the Ta macro can be used to delimit cells, and portability requires that Ta is called by other macros: some parsers do not recognize it when it appears as the first macro on a line.
Note that quoted strings may span tab-delimited cells on an It line. For example,
will preserve the whitespace before both commas, but not the whitespace before the semicolon.
See also Bl.
Specify a library. The syntax is as follows:
The library parameter may be a system library, such as libz or libpam, in which case a small library description is printed next to the linker invocation; or a custom library, in which case the library name is printed in quotes. This is most commonly used in the SYNOPSIS section as described in MANUAL STRUCTURE.
Examples:
Denotes text that should be in a literal font mode. Note that this is a presentation term and should not be used for stylistically decorating technical terms.
On terminal output devices, this is often indistinguishable from normal text.
See also Bf, Em, No, and Sy.
Format a hyperlink. Its syntax is as follows:
Examples:
See also Mt.
Synonym for Pp.
Display a mathematical symbol. Its syntax is as follows:
Examples:
Format a “mailto:” hyperlink. Its syntax is as follows:
Examples:
A one line description of the manual's content. This is the mandatory last macro of the NAME section and not appropriate for other sections.
Examples:
The Nd macro technically accepts child macros and terminates with a subsequent Sh invocation. Do not assume this behaviour: some whatis(1) database generators are not smart enough to parse more than the line arguments and will display macros verbatim.
See also Nm.
The name of the manual page, or — in particular in section 1, 6, and 8 pages — of an additional command or feature documented in the manual page. When first invoked, the Nm macro expects a single argument, the name of the manual page. Usually, the first invocation happens in the NAME section of the page. The specified name will be remembered and used whenever the macro is called again without arguments later in the page. The Nm macro uses Block full-implicit semantics when invoked as the first macro on an input line in the SYNOPSIS section; otherwise, it uses ordinary In-line semantics.
Examples:
.Sh SYNOPSIS .Nm cat .Op Fl benstuv .Op Ar
In the SYNOPSIS of section 2, 3 and 9 manual pages, use the Fn macro rather than Nm to mark up the name of the manual page.
Normal text. Closes the scope of any preceding in-line macro. When used after physical formatting macros like Em or Sy, switches back to the standard font face and weight. Can also be used to embed plain text strings in macro lines using semantic annotation macros.
Examples:
.Sm off .Cm :C No / Ar pattern No / Ar replacement No / .Sm on
See also Em, Li, and Sy.
Suppress a space between the output of the preceding macro and the following text or macro. Following invocation, input is interpreted as normal text just like after an No macro.
This has no effect when invoked at the start of a macro line.
Examples:
See also No and Sm.
Format the NetBSD version provided as an argument, or a default value if no argument is provided.
Examples:
See also At, Bsx, Bx, Dx, Fx, and Ox.
Close multi-line Oo context.
Multi-line version of Op.
Examples:
.Oo .Op Fl flag Ns Ar value .Oc
Optional part of a command line. Prints the argument(s) in brackets. This is most often used in the SYNOPSIS section of section 1 and 8 manual pages.
Examples:
See also Oo.
Operating system version for display in the page footer. This is the mandatory third macro of any mdoc file. Its syntax is as follows:
The optional system parameter specifies the relevant operating system or environment. It is suggested to leave it unspecified, in which case mandoc(1) uses its -Ios argument or, if that isn't specified either, sysname and release as returned by uname(3).
Examples:
See also Dd and Dt.
This macro is obsolete. Use Ft instead; with mandoc(1), both have the same effect.
Historical mdoc packages described it as “old function type (FORTRAN)”.
Format the OpenBSD version provided as an argument, or a default value if no argument is provided.
Examples:
See also At, Bsx, Bx, Dx, Fx, and Nx.
An absolute or relative file system path, or a file or directory name. If an argument is not provided, the character ‘~’ is used as a default.
Examples:
See also Lk.
Close parenthesised context opened by Po.
Removes the space between its argument and the following macro. Its syntax is as follows:
This is equivalent to:
The prefix argument is not parsed for macro names or delimiters, but used verbatim as if it were escaped.
Examples:
See also Ns and Sm.
Multi-line version of Pq.
Break a paragraph. This will assert vertical space between prior and subsequent macros and/or text.
Paragraph breaks are not needed before or after Sh or Ss macros or before displays (Bd) or lists (Bl) unless the -compact flag is given.
Parenthesised enclosure.
See also Po.
Close quoted context opened by Qo.
In-line literal display. This can for example be used for complete command invocations and for multi-word code fragments when more specific markup is not appropriate and an indented display is not desired. While mandoc(1) always encloses the arguments in single quotes, other formatters usually omit the quotes on non-terminal output devices when the arguments have three or more characters.
See also Dl and Bd -literal.
Multi-line version of Qq.
Encloses its arguments in "typewriter" double-quotes. Consider using Dq.
See also Dq, Sq, and Qo.
Close an Rs block. Does not have any tail arguments.
Begin a bibliographic (“reference”) block. Does not have any head arguments. The block macro may only contain %A, %B, %C, %D, %I, %J, %N, %O, %P, %Q, %R, %T, %U, and %V child macros (at least one must be specified).
Examples:
.Rs .%A J. E. Hopcroft .%A J. D. Ullman .%B Introduction to Automata Theory, Languages, and Computation .%I Addison-Wesley .%C Reading, Massachusetts .%D 1979 .Re
If an Rs block is used within a SEE ALSO section, a vertical space is asserted before the rendered output, else the block continues on the current line.
Insert a standard sentence regarding a function call's return value of 0 on success and -1 on error, with the errno libc global variable set on error. Its syntax is as follows:
If function is not specified, the document's name set by Nm is used. Multiple function arguments are treated as separate functions.
See also Ex.
Close single-quoted context opened by So.
Begin a new section. For a list of conventional manual sections, see MANUAL STRUCTURE. These sections should be used unless it's absolutely necessary that custom sections be used.
Section names should be unique so that they may be keyed by Sx. Although this macro is parsed, it should not consist of child node or it may not be linked with Sx.
See also Pp, Ss, and Sx.
Switches the spacing mode for output generated from macros. Its syntax is as follows:
By default, spacing is on. When switched off, no white space is inserted between macro arguments and between the output generated from adjacent macros, but text lines still get normal spacing between words and sentences.
When called without an argument, the Sm macro toggles the spacing mode. Using this is not recommended because it makes the code harder to read.
Multi-line version of Sq.
Encloses its arguments in ‘typewriter’ single-quotes.
See also Dq, Qq, and So.
Begin a new subsection. Unlike with Sh, there is no convention for the naming of subsections. Except DESCRIPTION, the conventional sections described in MANUAL STRUCTURE rarely have subsections.
Sub-section names should be unique so that they may be keyed by Sx. Although this macro is parsed, it should not consist of child node or it may not be linked with Sx.
See also Pp, Sh, and Sx.
Replace an abbreviation for a standard with the full form. The following standards are recognised. Where multiple lines are given without a blank line in between, they all refer to the same standard, and using the first form is recommended.
Reference a section or subsection in the same manual page. The referenced section or subsection name must be identical to the enclosed argument, including whitespace.
Examples:
See also Sh and Ss.
Request a boldface font.
This is most often used to indicate importance or seriousness (not to be confused with stress emphasis, see Em). When none of the semantic macros fit, it is also adequate for syntax elements that have to be given or that appear verbatim.
Examples:
.Sy Warning : If .Sy s appears in the owner permissions, set-user-ID mode is set. This utility replaces the former .Sy dumpdir program.
See also Bf, Em, Li, and No.
Table cell separator in Bl -column lists; can only be used below It.
Supported only for compatibility, do not use this in new manuals. Even though the macro name (“tradename”) suggests a semantic function, historic usage is inconsistent, mostly using it as a presentation-level macro to request a small caps font.
Supported only for compatibility, do not use this in new manuals. Prints out “currently under development.”
Supported only for compatibility, do not use this in new manuals. Prints out “UNIX”.
A variable name.
Examples:
For function arguments and parameters, use Fa instead. For declarations of global variables in the SYNOPSIS section, use Vt.
A variable type.
This is also used for indicating global variables in the SYNOPSIS section, in which case a variable name is also specified. Note that it accepts Block partial-implicit syntax when invoked as the first macro on an input line in the SYNOPSIS section, else it accepts ordinary In-line syntax. In the former case, this macro starts a new output line, and a blank line is inserted in front if there is a preceding function definition or include directive.
Examples:
For parameters in function prototypes, use Fa instead, for function return types Ft, and for variable names outside the SYNOPSIS section Va, even when including a type with the name. See also MANUAL STRUCTURE.
Close a scope opened by Xo.
Extend the header of an It macro or the body of a partial-implicit block macro beyond the end of the input line. This macro originally existed to work around the 9-argument limit of historic roff(7).
Link to another manual ("cross-reference"). Its syntax is as follows:
Cross reference the name and section number of another man page.
Examples:
The syntax of a macro depends on its classification. In this section, ‘-arg’ refers to macro arguments, which may be followed by zero or more ‘parm’ parameters; ‘Yo’ opens the scope of a macro; and if specified, ‘Yc’ closes it out.
The Callable column indicates that the macro may also be called by passing its name as an argument to another macro. For example, ‘.Op Fl O Ar file’ produces ‘[-O file]’. To prevent a macro call and render the macro name literally, escape it by prepending a zero-width space, ‘\&’. For example, ‘Op \&Fl O’ produces ‘[Fl O]’. If a macro is not callable but its name appears as an argument to another macro, it is interpreted as opaque text. For example, ‘.Fl Sh’ produces ‘-Sh’.
The Parsed column indicates whether the macro may call other macros by receiving their names as arguments. If a macro is not parsed but the name of another macro appears as an argument, it is interpreted as opaque text.
The Scope column, if applicable, describes closure rules.
Multi-line scope closed by an explicit closing macro. All macros contains bodies; only Bf and (optionally) Bl contain a head.
.Yo [-arg [parm...]] [head...] [body...] .Yc
Macro | Callable | Parsed | Scope |
Bd | No | No | closed by Ed |
Bf | No | No | closed by Ef |
Bk | No | No | closed by Ek |
Bl | No | No | closed by El |
Ed | No | No | opened by Bd |
Ef | No | No | opened by Bf |
Ek | No | No | opened by Bk |
El | No | No | opened by Bl |
Multi-line scope closed by end-of-file or implicitly by another macro. All macros have bodies; some (It -bullet, -hyphen, -dash, -enum, -item) don't have heads; only one (It in Bl -column) has multiple heads.
.Yo [-arg [parm...]] [head... [Ta head...]] [body...]
Macro | Callable | Parsed | Scope |
It | No | Yes | closed by It, El |
Nd | No | No | closed by Sh |
Nm | No | Yes | closed by Nm, Sh, Ss |
Sh | No | Yes | closed by Sh |
Ss | No | Yes | closed by Sh, Ss |
Note that the Nm macro is a Block full-implicit macro only when invoked as the first macro in a SYNOPSIS section line, else it is In-line.
Like block full-explicit, but also with single-line scope. Each has at least a body and, in limited circumstances, a head (Fo, Eo) and/or tail (Ec).
.Yo [-arg [parm...]] [head...] [body...] .Yc [tail...] .Yo [-arg [parm...]] [head...] [body...] Yc [tail...]
Macro | Callable | Parsed | Scope |
Ac | Yes | Yes | opened by Ao |
Ao | Yes | Yes | closed by Ac |
Bc | Yes | Yes | closed by Bo |
Bo | Yes | Yes | opened by Bc |
Brc | Yes | Yes | opened by Bro |
Bro | Yes | Yes | closed by Brc |
Dc | Yes | Yes | opened by Do |
Do | Yes | Yes | closed by Dc |
Ec | Yes | Yes | opened by Eo |
Eo | Yes | Yes | closed by Ec |
Fc | Yes | Yes | opened by Fo |
Fo | No | No | closed by Fc |
Oc | Yes | Yes | closed by Oo |
Oo | Yes | Yes | opened by Oc |
Pc | Yes | Yes | closed by Po |
Po | Yes | Yes | opened by Pc |
Qc | Yes | Yes | opened by Oo |
Qo | Yes | Yes | closed by Oc |
Re | No | No | opened by Rs |
Rs | No | No | closed by Re |
Sc | Yes | Yes | opened by So |
So | Yes | Yes | closed by Sc |
Xc | Yes | Yes | opened by Xo |
Xo | Yes | Yes | closed by Xc |
Like block full-implicit, but with single-line scope closed by the end of the line.
.Yo [-arg [val...]] [body...] [res...]
Macro | Callable | Parsed |
Aq | Yes | Yes |
Bq | Yes | Yes |
Brq | Yes | Yes |
D1 | No | Yes |
Dl | No | Yes |
Dq | Yes | Yes |
En | Yes | Yes |
Op | Yes | Yes |
Pq | Yes | Yes |
Ql | Yes | Yes |
Yes | Yes | |
Sq | Yes | Yes |
Vt | Yes | Yes |
Note that the Vt macro is a Block partial-implicit only when invoked as the first macro in a SYNOPSIS section line, else it is In-line.
The Ta macro can only be used below It in Bl -column lists. It delimits blocks representing table cells; these blocks have bodies, but no heads.
Macro | Callable | Parsed | Scope |
Ta | Yes | Yes | closed by Ta, It |
Closed by the end of the line, fixed argument lengths, and/or subsequent macros. In-line macros have only text children. If a number (or inequality) of arguments is (n), then the macro accepts an arbitrary number of arguments.
.Yo [-arg [val...]] [args...] [res...] .Yo [-arg [val...]] [args...] Yc... .Yo [-arg [val...]] arg0 arg1 argN
Macro | Callable | Parsed | Arguments |
%A | No | No | >0 |
%B | No | No | >0 |
%C | No | No | >0 |
%D | No | No | >0 |
%I | No | No | >0 |
%J | No | No | >0 |
%N | No | No | >0 |
%O | No | No | >0 |
%P | No | No | >0 |
%Q | No | No | >0 |
%R | No | No | >0 |
%T | No | No | >0 |
%U | No | No | >0 |
%V | No | No | >0 |
Ad | Yes | Yes | >0 |
An | Yes | Yes | >0 |
Ap | Yes | Yes | 0 |
Ar | Yes | Yes | n |
At | Yes | Yes | 1 |
Bsx | Yes | Yes | n |
Bt | No | No | 0 |
Bx | Yes | Yes | n |
Cd | Yes | Yes | >0 |
Cm | Yes | Yes | >0 |
Db | No | No | 1 |
Dd | No | No | n |
Dt | No | No | n |
Dv | Yes | Yes | >0 |
Dx | Yes | Yes | n |
Em | Yes | Yes | >0 |
Er | Yes | Yes | >0 |
Es | Yes | Yes | 2 |
Ev | Yes | Yes | >0 |
Ex | No | No | n |
Fa | Yes | Yes | >0 |
Fd | No | No | >0 |
Fl | Yes | Yes | n |
Fn | Yes | Yes | >0 |
Fr | Yes | Yes | >0 |
Ft | Yes | Yes | >0 |
Fx | Yes | Yes | n |
Hf | No | No | n |
Ic | Yes | Yes | >0 |
In | No | No | 1 |
Lb | No | No | 1 |
Li | Yes | Yes | >0 |
Lk | Yes | Yes | >0 |
Lp | No | No | 0 |
Ms | Yes | Yes | >0 |
Mt | Yes | Yes | >0 |
Nm | Yes | Yes | n |
No | Yes | Yes | 0 |
Ns | Yes | Yes | 0 |
Nx | Yes | Yes | n |
Os | No | No | n |
Ot | Yes | Yes | >0 |
Ox | Yes | Yes | n |
Pa | Yes | Yes | n |
Pf | Yes | Yes | 1 |
Pp | No | No | 0 |
Rv | No | No | n |
Sm | No | No | <2 |
St | No | Yes | 1 |
Sx | Yes | Yes | >0 |
Sy | Yes | Yes | >0 |
Tn | Yes | Yes | >0 |
Ud | No | No | 0 |
Ux | Yes | Yes | n |
Va | Yes | Yes | n |
Vt | Yes | Yes | >0 |
Xr | Yes | Yes | 2 |
When a macro argument consists of one single input character considered as a delimiter, the argument gets special handling. This does not apply when delimiters appear in arguments containing more than one character. Consequently, to prevent special handling and just handle it like any other argument, a delimiter can be escaped by prepending a zero-width space (‘\&’). In text lines, delimiters never need escaping, but may be used as normal punctuation.
For many macros, when the leading arguments are opening delimiters, these delimiters are put before the macro scope, and when the trailing arguments are closing delimiters, these delimiters are put after the macro scope. Spacing is suppressed after opening delimiters and before closing delimiters. For example,
renders as:
Opening delimiters are:
Closing delimiters are:
Note that even a period preceded by a backslash (‘\.’) gets this special handling; use ‘\&.’ to prevent that.
Many in-line macros interrupt their scope when they encounter delimiters, and resume their scope when more arguments follow that are not delimiters. For example,
renders as:
This applies to both opening and closing delimiters, and also to the middle delimiter, which does not suppress spacing:
As a special case, the predefined string \*(Ba is handled and rendered in the same way as a plain ‘|’ character. Using this predefined string is not recommended in new manuals.
In mdoc documents, usage of semantic markup is recommended in order to have proper fonts automatically selected; only when no fitting semantic markup is available, consider falling back to Physical markup macros. Whenever any mdoc macro switches the roff(7) font mode, it will automatically restore the previous font when exiting its scope. Manually switching the font using the roff(7) ‘\f’ font escape sequences is never required.
This section provides an incomplete list of compatibility issues between mandoc and GNU troff ("groff").
The following problematic behaviour is found in groff:
The following features are unimplemented in mandoc:
man(1), mandoc(1), eqn(7), man(7), mandoc_char(7), roff(7), tbl(7)
The web page extended documentation for the mdoc language: http://mandoc.bsd.lv/mdoc/ provides a few tutorial-style pages for beginners, an extensive style guide for advanced authors, and an alphabetic index helping to choose the best macros for various kinds of content.
The mdoc language first appeared as a troff macro package in 4.4BSD. It was later significantly updated by Werner Lemberg and Ruslan Ermilov in groff-1.17. The standalone implementation that is part of the mandoc(1) utility written by Kristaps Dzonsons appeared in OpenBSD 4.6.
The mdoc reference was written by Kristaps Dzonsons <kristaps@bsd.lv>.
July 28, 2018 | Debian |