| Linux / Unix Command: mdoc.samples |
NAME
mdoc.samples - tutorial sampler for writing BSD manuals with -mdocSYNOPSIS
man mdoc.samplesDESCRIPTION
A tutorial sampler for writing BSD manual pages with the -mdoc macro package, a content -based and domain -based formatting package for troff(1). Its predecessor, the -man7 package, addressed page layout leaving the manipulation of fonts and other typesetting details to the individual author. In -mdoc page layout macros make up the page structure domain which consists of macros for titles, section headers, displays and lists. Essentially items which affect the physical position of text on a formatted page. In addition to the page structure domain, there are two more domains, the manual domain and the general text domain. The general text domain is defined as macros which perform tasks such as quoting or emphasizing pieces of text. The manual domain is defined as macros that are a subset of the day to day informal language used to describe commands, routines and related BSD files. Macros in the manual domain handle command names, command line arguments and options, function names, function parameters, pathnames, variables, cross references to other manual pages, and so on. These domain items have value for both the author and the future user of the manual page. It is hoped the consistency gained across the manual set will provide easier translation to future documentation tools.Throughout the UNIX manual pages, a manual entry is simply referred to as a man page, regardless of actual length and without sexist intention.
GETTING STARTED
Since a tutorial document is normally read when a person desires to use the material immediately, the assumption has been made that the user of this document may be impatient. The material presented in the remained of this document is outlined as follows:-
TROFF IDIOSYNCRASIES
- "Macro Usage"
- "Passing Space Characters in an Argument"
- "Trailing Blank Space Characters (a warning)"
- "Escaping Special Characters"
-
THE ANATOMY OF A MAN PAGE
- "A manual page template"
- TITLE MACROS
-
INTRODUCTION OF MANUAL AND GENERAL TEXT DOMAINS
- "What's in a name..."
- "General Syntax"
-
MANUAL DOMAIN
- "Addresses"
- "Author name"
- "Arguments"
- "Configuration Declarations (section four only)"
- "Command Modifier"
- "Defined Variables"
- "Errno's (Section two only)"
- "Environment Variables"
- "Function Argument"
- "Function Declaration"
- "Flags"
- "Functions (library routines)"
- "Function Types"
- "Interactive Commands"
- "Names"
- "Options"
- "Pathnames"
- "Variables"
- "Cross References"
-
GENERAL TEXT DOMAIN
- "AT&T Macro"
- "BSD Macro"
- "FreeBSD Macro"
- "UNIX Macro"
- "Enclosure/Quoting Macros"
-
- "Angle Bracket Quote/Enclosure"
- "Bracket Quotes/Enclosure"
- "Double Quote macro/Enclosure"
- "Parenthesis Quote/Enclosure"
- "Single Quotes/Enclosure"
- "Prefix Macro"
- "No-[or Normal Text Macro]
- "Space Macro
- "Section Cross References"
- "References and Citations"
- "Return Values (sections two and three only)"
- "Trade Names (Acronyms and Type Names)"
- "Extended Arguments"
-
PAGE STRUCTURE DOMAIN
- "Section Headers"
- "Paragraphs and Line Spacing"
- "Keeps"
- "Displays"
- "Font Modes (Emphasis, Literal, and Symbolic)"
- "Lists and Columns"
- PREDEFINED STRINGS
- DIAGNOSTICS
- FORMATTING WITH GROFF, TROFF AND NROFF
- BUGS
TROFF IDIOSYNCRASIES
The -mdoc package attempts to simplify the process of writing a man page. Theoretically, one should not have to learn the dirty details of troff(1) to use -mdoc however, there are a few limitations which are unavoidable and best gotten out of the way. And, too, be forewarned, this package is not fast.Macro Usage
As in troff(1), a macro is called by placing a `.' (dot character) at the beginning of a line followed by the two character name for the macro. Arguments may follow the macro separated by spaces. It is the dot character at the beginning of the line which causes troff(1) to interpret the next two characters as a macro name. To place a `.' (dot character) at the beginning of a line in some context other than a macro invocation, precede the `.' (dot) with the `\&' escape sequence. The `\&' translates literally to a zero width space, and is never displayed in the output.In general, troff(1) macros accept up to nine arguments, any extra arguments are ignored. Most macros in -mdoc accept nine arguments and, in limited cases, arguments may be continued or extended on the next line (See Sx Extensions ) . A few macros handle quoted arguments (see Sx Passing Space Characters in an Argument below).
Most of the -mdoc general text domain and manual domain macros are special in that their argument lists are parsed for callable macro names. This means an argument on the argument list which matches a general text or manual domain macro name and is determined to be callable will be executed or called when it is processed. In this case the argument, although the name of a macro, is not preceded by a `.' (dot). It is in this manner that many macros are nested; for example the option macro, `.[,] ' may call the flag and argument macros, `- ' and `file ... ' to specify an optional flag with an argument:
- [-s bytes ]
- is produced by .[-s bytes ]
To prevent a two character string from being interpreted as a macro name, precede the string with the escape sequence `\&' :
- [-s bytes ]
- is produced by .[\&-s \&bytes ]
Here the strings `- ' and `file ... ' are not interpreted as macros. Macros whose argument lists are parsed for callable arguments are referred to as parsed and macros which may be called from an argument list are referred to as callable throughout this document and in the companion quick reference manual mdoc(7). This is a technical faux pas as almost all of the macros in -mdoc are parsed, but as it was cumbersome to constantly refer to macros as being callable and being able to call other macros, the term parsed has been used.
Passing Space Characters in an Argument
Sometimes it is desirable to give as one argument a string containing one or more blank space characters. This may be necessary to defeat the nine argument limit or to specify arguments to macros which expect particular arrangement of items in the argument list. For example, the function macro `.Fn expects ' the first argument to be the name of a function and any remaining arguments to be function parameters. As ANSI C stipulates the declaration of function parameters in the parenthesized parameter list, each parameter is guaranteed to be at minimum a two word string. For example, Fa int foo .There are two possible ways to pass an argument which contains an embedded space. Implementation note Unfortunately, the most convenient way of passing spaces in between quotes by reassigning individual arguments before parsing was fairly expensive speed wise and space wise to implement in all the macros for AT&T troff. It is not expensive for groff but for the sake of portability, has been limited to the following macros which need it the most:
- Configuration declaration (section 4
- Sx SYNOPSIS )
- Begin list (for the width specifier).
- Emphasized text.
- Fn Functions (sections two and four).
- List items.
-
- Literal text.
- Symbolic text.
- %B
- Book titles.
- %J
- Journal names.
- %O
- Optional notes for a reference.
- %R
- Report title (in a reference).
- %T
- Title of article in a book or journal.
One way of passing a string
containing blank spaces is to use the hard or unpaddable space character
`\
,'
that is, a blank space preceded by the escape character
`\'
This method may be used with any macro but has the side effect
of interfering with the adjustment of text
over the length of a line.
Troff
sees the hard space as if it were any other printable character and
cannot split the string into blank or newline separated pieces as one
would expect.
The method is useful for strings which are not expected
to overlap a line boundary.
For example:
- Fn fetch char *str
- is created by `.Fn fetch ' char\ *str
- Fn fetch char *str
- can also be created by `.Fn fetch ' \*qchar *str\*q
If the `\' or quotes were omitted, `.Fn would ' see three arguments and the result would be:
Fn fetch char *str
For an example of what happens when the parameter list overlaps a newline boundary, see the Sx BUGS section.
Trailing Blank Space Characters
Troff can be confused by blank space characters at the end of a line. It is a wise preventive measure to globally remove all blank spaces from <blank-space><end-of-line> character sequences. Should the need arise to force a blank character at the end of a line, it may be forced with an unpaddable space and the `\&' escape character. For example, `string\\& .'Escaping Special Characters
Special characters like the newline character `\n' , are handled by replacing the `\' with `\e' (e.g. `\en' ) to preserve the backslash.THE ANATOMY OF A MAN PAGE
The body of a man page is easily constructed from a basic template found in the file /usr/share/misc/mdoc.template Several example man pages can also be found in /usr/share/examples/mdocA manual page template
.\" The following requests are required for all man pages. .Dd Month day, year .Os OPERATING_SYSTEM [version/release] .Dt DOCUMENT_TITLE [section number] [volume] .Sh NAME .Nm name .Nd one line description of name .Sh SYNOPSIS .Sh DESCRIPTION .\" The following requests should be uncommented and .\" used where appropriate. This next request is .\" for sections 2 and 3 function return values only. .\" .Sh RETURN VALUES .\" This next request is for sections 1, 6, 7 & 8 only .\" .Sh ENVIRONMENT .\" .Sh FILES .\" .Sh EXAMPLES .\" This next request is for sections 1, 6, 7 & 8 only .\" (command return values (to shell) and .\" fprintf/stderr type diagnostics) .\" .Sh DIAGNOSTICS .\" The next request is for sections 2 and 3 error .\" and signal handling only. .\" .Sh ERRORS .\" .Sh SEE ALSO .\" .Sh CONFORMING TO .\" .Sh HISTORY .\" .Sh AUTHORS .\" .Sh BUGS
The first items in the template are the macros (., ., . ) the document date, the operating system the man page or subject source is developed or modified for, and the man page title (in upper case ) along with the section of the manual the page belongs in. These macros identify the page, and are discussed below in Sx TITLE MACROS .
The remaining items in the template are section headers (.
;
) of which Sx NAME , Sx SYNOPSIS and Sx DESCRIPTION are mandatory. The headers are discussed in Sx PAGE STRUCTURE DOMAIN , after presentation of Sx MANUAL DOMAIN . Several content macros are used to demonstrate page layout macros; reading about content macros before page layout macros is recommended.TITLE MACROS
The title macros are the first portion of the page structure domain, but are presented first and separate for someone who wishes to start writing a man page yesterday. Three header macros designate the document title or manual page title, the operating system, and the date of authorship. These macros are one called once at the very beginning of the document and are used to construct the headers and footers only.- .
-
The document title is the
subject of the man page and must be in
CAPITALS
due to troff
limitations.
The section number may be 1, ..., 8,
and if it is specified,
the volume title may be omitted.
A volume title may be arbitrary or one of the following:
- AMD UNIX Ancestral Manual Documents
- SMM UNIX System Manager's Manual
- URM UNIX Reference Manual
- PRMUNIX Programmer's Manual
The default volume labeling is
URM for sections 1, 6, and 7; SMM for section 8; PRM for sections 2, 3, 4, and 5. - .operating_system release#
-
The name of the operating system
should be the common acronym, e.g.
BSD
or
FreeBSD
or
ATT
The release should be the standard release
nomenclature for the system specified, e.g. 4.3, 4.3+Tahoe, V.3,
V.4.
Unrecognized arguments are displayed as given in the page footer.
For instance, a typical footer might be:
.BSD 4.3
or
.FreeBSD 2.2
or for a locally produced set
.CS Department
The Berkeley default, `.without ' an argument, has been defined as BSD in the site specific file /usr/share/tmac/mdoc/doc-common It really should default to LOCAL Note, if the `.macro ' is not present, the bottom left corner of the page will be ugly.
- .month day, year
-
The date should be written formally:
January 25, 1989
INTRODUCTION OF MANUAL AND GENERAL TEXT DOMAINS
What's in a name...
The manual domain macro names are derived from the day to day informal language used to describe commands, subroutines and related files. Slightly different variations of this language are used to describe the three different aspects of writing a man page. First, there is the description of -mdoc macro request usage. Second is the description of a UNIX command with -mdoc macros and third, the description of a command to a user in the verbal sense; that is, discussion of a command in the text of a man page.In the first case, troff(1) macros are themselves a type of command; the general syntax for a troff command is:
.Va argument1 argument2 ... argument9
The `.is ' a macro command or request, and anything following it is an argument to be processed. In the second case, the description of a UNIX command using the content macros is a bit more involved; a typical Sx SYNOPSIS command line might be displayed as:
filter [-flag ] infile outfile
Here, filter is the command name and the bracketed string -flag is a flag argument designated as optional by the option brackets. In -mdoc terms, infile and outfile are called arguments The macros which formatted the above example:
.Nm filter .Op Fl flag .Ar infile outfile
In the third case, discussion of commands and command syntax includes both examples above, but may add more detail. The arguments infile and outfile from the example above might be referred to as operands or file arguments Some command line argument lists are quite long:
- make
- [-eiknqrstv ] [-D variable ] [-d flags ] [-f makefile ] -words [-I directory ] [-j max_jobs ] [variable=value ] -words [target ... ]
Here one might talk about the command make and qualify the argument makefile as an argument to the flag, -f or discuss the optional file operand target In the verbal context, such detail can prevent confusion, however the -mdoc package does not have a macro for an argument to a flag. Instead the `file ... ' argument macro is used for an operand or file argument like target as well as an argument to a flag like variable The make command line was produced from:
.Nm make .Op Fl eiknqrstv .Op Fl D Ar variable .Op Fl d Ar flags .Op Fl f Ar makefile .Op Fl I Ar directory .Op Fl j Ar max_jobs .Op Ar variable=value .Bk -words .Op Ar target ... .Ek
The `.and ' `.macros ' are explained in Sx Keeps .
General Syntax
The manual domain and general text domain macros share a similar syntax with a few minor deviations: `.file ... ' `.- ' `.man mdoc.samples ' and `.differ ' only when called without arguments; `.Fn and ' `.impose ' an order on their argument lists and the `.[and] ' `.Fn macros ' have nesting limitations. All content macros are capable of recognizing and properly handling punctuation, provided each punctuation character is separated by a leading space. If an request is given:
.sptr, ptr),
The result is:
sptr, ptr),
The punctuation is not recognized and all is output in the literal font. If the punctuation is separated by a leading white space:
.sptr , ptr ) ,
The result is:
sptr , ptr
The punctuation is now recognized and is output in the default font distinguishing it from the strings in literal font.
To remove the special meaning from a punctuation character escape it with `\&' Troff is limited as a macro language, and has difficulty when presented with a string containing a member of the mathematical, logical or quotation set:
{+,-,/,*,%,<,>,<=,>=,=,==,&,`,',"}
The problem is that troff may assume it is supposed to actually perform the operation or evaluation suggested by the characters. To prevent the accidental evaluation of these characters, escape them with `\&' Typical syntax is shown in the first content macro displayed below, `. '
MANUAL DOMAIN
Address Macro
The address macro identifies an address construct of the form addr1[,addr2[,addr3]].
Usage: .address ...
- .addr1
- addr1
- .addr1
- addr1
- .addr1 , file2
- addr1 , file2
- .f1 , f2 , f3:
- f1 , f2 , f3
- .addr ) ),
- addr ) )
It is an error to call `.without ' arguments. `.is ' callable by other macros and is parsed.
Author Name
The `.An macro ' is used to specify the name of the author of the item being documented, or the name of the author of the actual manual page. Any remaining arguments after the name information are assumed to be punctuation.
Usage: .An author_name
- .An Joe Author
- An Joe Author
- .An Joe Author,
- An Joe Author ,
- .An Joe Author Aq nobody@FreeBSD.ORG
- An Joe Author Aq nobody@FreeBSD.ORG
- .An Joe Author ) ),
- An Joe Author ) ) ,
The `.An macro ' is parsed and is callable. It is an error to call `.An without ' any arguments.
Argument Macro
The `.file ... ' argument macro may be used whenever a command line argument is referenced.
Usage: .argument ...
- .file ...
- file ...
- .file1
- file1
- .file1
- file1
- .file1 file2
- file1 file2
- .f1 f2 f3:
- f1 f2 f3
- .file ) ),
- file ) )
If `.file ... ' is called without arguments `file ... ' is assumed. The `.file ... ' macro is parsed and is callable.
Configuration Declaration (section four only)
The `.macro ' is used to demonstrate a config(8) declaration for a device interface in a section four manual. This macro accepts quoted arguments (double quotes only).
- device le0 at scode?
- produced by: `.device ' le0 at scode? .
Command Modifier
The command modifier is identical to the `.- ' (flag) command with the exception the `.macro ' does not assert a dash in front of every argument. Traditionally flags are marked by the preceding dash, some commands or subsets of commands do not use them. Command modifiers may also be specified in conjunction with interactive commands such as editor commands. See Sx Flags .Defined Variables
A variable which is defined in an include file is specified by the macro `. '
Usage: .defined_variable ...
- .MAXHOSTNAMELEN
- MAXHOSTNAMELEN
- .TIOCGPGRP )
- TIOCGPGRP
It is an error to call `.without ' arguments. `.is ' parsed and is callable.
Errno's (Section two only)
The `.Er errno ' macro specifies the error return value for section two library routines. The second example below shows `.Er used ' with the `.Bq general ' text domain macro, as it would be used in a section two manual page.
Usage: .Er ERRNOTYPE ...
- .Er ENOENT
- Er ENOENT
- .Er ENOENT );
- Er ENOENT ) ;
- .Bq Er ENOTDIR
- Bq Er ENOTDIR
It is an error to call `.Er without ' arguments. The `.Er macro ' is parsed and is callable.
Environment Variables
The `.macro ' specifies an environment variable.
Usage: .argument ...
- .DISPLAY
- DISPLAY
- .PATH
- PATH
- .PRINTER ) ),
- PRINTER ) )
It is an error to call `.without ' arguments. The `.macro ' is parsed and is callable.
Function Argument
The `.Fa macro ' is used to refer to function arguments (parameters) outside of the Sx SYNOPSIS section of the manual or inside the Sx SYNOPSIS section should a parameter list be too long for the `.Fn macro ' and the enclosure macros `.Fo and ' `.Fc must ' be used. `.Fa may ' also be used to refer to structure members.
Usage: .Fa function_argument ...
- .Fa d_namlen ) ),
- Fa d_namlen ) ) ,
- .Fa iov_len
- Fa iov_len
It is an error to call `.Fa without ' arguments. `.Fa is ' parsed and is callable.
Function Declaration
The `.Fd macro ' is used in the Sx SYNOPSIS section with section two or three functions. The `.Fd macro ' does not call other macros and is not callable by other macros.
Usage: .Fd include_file (or defined variable)
In the Sx SYNOPSIS section a `.Fd request ' causes a line break if a function has already been presented and a break has not occurred. This leaves a nice vertical space in between the previous function call and the declaration for the next function.
Flags
The `.- ' macro handles command line flags. It prepends a dash, `-' , to the flag. For interactive command flags, which are not prepended with a dash, the `.(command ' modifier) macro is identical, but without the dash.
Usage: .-argument ...
- .-
- -
- .-cfv
- -cfv
- .-cfv
- -cfv
- .-s v t
- -s v t
- .--,
- --
- .-xyz ),
- -xyz )
The `.- ' macro without any arguments results in a dash representing stdin/stdout. Note that giving `.- ' a single dash, will result in two dashes. The `.- ' macro is parsed and is callable.
Functions (library routines)
The .Fn macro is modeled on ANSI C conventions.Usage: .Fn [type] function [[type] parameters ... ]
- .Fn getchar
- Fn getchar
- .Fn strlen ) ,
- Fn strlen ) ,
- .Fn \*qint align\*q \*qconst * char *sptrs\*q
- Fn int align const * char *sptrs ,
It is an error to call `.Fn without ' any arguments. The `.Fn macro ' is parsed and is callable, note that any call to another macro signals the end of the `.Fn call ' (it will close-parenthesis at that point).
For functions that have more than eight parameters (and this is rare), the macros `.Fo (function ' open) and `.Fc (function ' close) may be used with `.Fa (function ' argument) to get around the limitation. For example:
.Fo "int res_mkquery" .Fa "int op" .Fa "char *dname" .Fa "int class" .Fa "int type" .Fa "char *data" .Fa "int datalen" .Fa "struct rrec *newrr" .Fa "char *buf" .Fa "int buflen" .Fc
Produces:
Fo int res_mkquery Fa int op Fa char *dname Fa int class Fa int type Fa char *data Fa int datalen Fa struct rrec *newrr Fa char *buf Fa int buflen Fc
The `.Fo and ' `.Fc macros ' are parsed and are callable. In the Sx SYNOPSIS section, the function will always begin at the beginning of line. If there is more than one function presented in the Sx SYNOPSIS section and a function type has not been given, a line break will occur, leaving a nice vertical space between the current function name and the one prior. At the moment, `.Fn does ' not check its word boundaries against troff line lengths and may split across a newline ungracefully. This will be fixed in the near future.
Function Type
This macro is intended for the Sx SYNOPSIS section. It may be used anywhere else in the man page without problems, but its main purpose is to present the function type in kernel normal form for the Sx SYNOPSIS of sections two and three (it causes a line break allowing the function name to appear on the next line).
Usage: .Ft type ...
- .Ft struct stat
- Ft struct stat
The `.Ft request ' is not callable by other macros.
Interactive Commands
The `.macro ' designates an interactive or internal command.
Usage: .argument ...
- .:wq
- :wq
- .do while {...}
- do while {...}
- .setenv , unsetenv
- setenv , unsetenv
It is an error to call `.without ' arguments. The `.macro ' is parsed and is callable.
Name Macro
The `.man mdoc.samples ' macro is used for the document title or subject name. It has the peculiarity of remembering the first argument it was called with, which should always be the subject name of the page. When called without arguments, `.man mdoc.samples ' regurgitates this initial name for the sole purpose of making less work for the author. Note: a section two or three document function name is addressed with the `.man mdoc.samples ' in the Sx NAME section, and with `.Fn in ' the Sx SYNOPSIS and remaining sections. For interactive commands, such as the `while' command keyword in csh(1), the `.macro ' should be used. While the `.is ' nearly identical to `.man mdoc.samples ' it can not recall the first argument it was invoked with.
Usage: .argument ...
- .mdoc.sample
- mdoc.sample
- .\-mdoc
- -mdoc
- .foo ) ),
- foo ) )
- .man mdoc.samples
- man mdoc.samples
The `.man mdoc.samples ' macro is parsed and is callable.
Options
The `.[macro] ' places option brackets around the any remaining arguments on the command line, and places any trailing punctuation outside the brackets. The macros `.] ' and `.[may ' be used across one or more lines.
Usage: .[options ... ]
- .[[
- .[-k ]
-
]
]
- [-k ]
- .[-k ) . ]
- [-k ]
- .[-k kookfile ]
- [-k kookfile ]
- .[-k kookfile , ]
- [-k kookfile ]
- .[objfil [corfil ] ]
- [objfil [corfil ] ]
- .[-c objfil [corfil , ] ]
- [-c objfil [corfil ] ]
- .[word1 word2]
- [word1 word2]
The `.] ' and `.[macros: '
.Oo .Op Fl k Ar kilobytes .Op Fl i Ar interval .Op Fl c Ar count .Oc
Produce: [[-k kilobytes ] [-i interval ] [-c count ] ]
The macros `.[,] ' `.] ' and `.[are ' parsed and are callable.
Pathnames
The `.macro ' formats path or file names.
Usage: .pathname
- ./usr/share
- /usr/share
- ./tmp/fooXXXXX )
- /tmp/fooXXXXX )
The `.macro ' is parsed and is callable.
Variables
Generic variable reference:
Usage: .variable ...
- .count
- count
- .settimer
- settimer
- .int *prt ):
- int *prt )
- .char s ] ) ),
- char s ] ) )
It is an error to call `.without ' any arguments. The `.macro ' is parsed and is callable.
Manual Page Cross References
The `.macro ' expects the first argument to be a manual page name, and the second argument, if it exists, to be either a section page number or punctuation. Any remaining arguments are assumed to be punctuation.
Usage: .man_page[1,...,8]
The `.macro ' is parsed and is callable. It is an error to call `.without ' any arguments.
GENERAL TEXT DOMAIN
AT&T Macro
Usage: .At [v6 | v7 | 32v | V.1 | V.4] ...
- .At
- AT&T System
- .AT&T System v6 .
- AT&T System v6 .
The `.AT&T System ' macro is not parsed and not callable. It accepts at most two arguments.
BSD Macro
Usage: .BSD [Version/release] ...
- .Bx
- BSD
- .BSD 4.3 .
- BSD 4.3
The `.BSD macro ' is parsed and is callable.
FreeBSD Macro
Usage: .Fx Version.release ...
- .Fx 2.2 .
- Fx 2.2 .
The `.Fx macro ' is not parsed and not callable. It accepts at most two arguments.
UNIX Macro
Usage: .UNIX
- .Ux
- UNIX
The `.UNIX ' macro is parsed and is callable.
Enclosure and Quoting Macros
The concept of enclosure is similar to quoting. The object being to enclose one or more strings between a pair of characters like quotes or parentheses. The terms quoting and enclosure are used interchangeably throughout this document. Most of the one line enclosure macros end in small letter `q' to give a hint of quoting, but there are a few irregularities. For each enclosure macro there is also a pair of open and close macros which end in small letters `o' and `c' respectively. These can be used across one or more lines of text and while they have nesting limitations, the one line quote macros can be used inside of them.
Quote Close Open Function Result .Aq .Ac .Ao Angle Bracket Enclosure<string>
.Bq .Bc .Bo Bracket Enclosure [string]
.Dq .Dc .Do Double Quote ``string''
.Ec .Eo Enclose String (in XX) XXstringXX
.Pq .Pc .Po Parenthesis Enclosure (string)
.Ql Quoted Literal `st' or string
.Qq .Qc .Qo Straight Double Quote "string"
.Sq .Sc .So Single Quote `string'
Except for the irregular macros noted below, all of the quoting macros are parsed and callable. All handle punctuation properly, as long as it is presented one character at a time and separated by spaces. The quoting macros examine opening and closing punctuation to determine whether it comes before or after the enclosing string. This makes some nesting possible.
- .Ec , .Eo These macros expect the first argument to be the
- opening and closing strings respectively.
- .`The'
- quoted literal macro behaves differently for troff than nroff. If formatted with nroff, a quoted literal is always quoted. If formatted with troff, an item is only quoted if the width of the item is less than three constant width characters. This is to make short strings more visible where the font change to literal (constant width) is less noticeable.
- .The prefix macro is not callable, but it is parsed:
-
- .( Fa name2
- becomes ( Fa name2
The `.(no ' space) macro performs the analogous suffix function.
Examples of quoting:
- .Aq Aq
- .Aq ctype.h ),
-
- Aq Ar ctype.h ) ,
- .Bq Bq
- .Bq Greek , French .
-
- Bq Em Greek , French .
- .````
- .``string abc .''
-
''
''
- ``string abc''
- .``'^[A-Z]'''
- ``'^[A-Z]'''
- .`man'
- mdoc `man' mdoc
- .Qq Qq
- .Qq string ) ,
-
- Qq string ) ,
- .Qq string ),
- Qq string Ns ),
- .``
- .`string'
-
'
'
- `string'
For a good example of nested enclosure macros, see the `.[option] ' macro. It was created from the same underlying enclosure macros as those presented in the list above. The `. ' and `. ' extended argument list macros were also built from the same underlying routines and are a good example of -mdoc macro usage at its worst.
No-[or Normal Text Macro]
The macro `.is ' a hack for words in a macro command line which should not be formatted and follows the conventional syntax for content macros.Space Macro
The `.macro ' eliminates unwanted spaces in between macro requests. It is useful for old style argument lists where there is no space between the flag and argument:- .[-I directory ]
- produces [-I directory ]
Note: the `.macro ' always invokes the `.macro ' after eliminating the space unless another macro name follows it. The macro `.is ' parsed and is callable.
Section Cross References
The `.Sx macro ' designates a reference to a section header within the same document. It is parsed and is callable.
- .Sx FILES
- Sx FILES
References and Citations
The following macros make a modest attempt to handle references. At best, the macros make it convenient to manually drop in a subset of refer style references.
- .Rs
- Reference Start. Causes a line break and begins collection of reference information until the reference end macro is read.
- .Re
- Reference End. The reference is printed.
- .%A
- Reference author name, one name per invocation.
- .%B
- Book title.
- .%C
- City/place.
- .%D
- Date.
- .%J
- Journal name.
- .%N
- Issue number.
- .%O
- Optional information.
- .%P
- Page number.
- .%R
- Report name.
- .%T
- Title of article.
- .%V
- Volume(s).
The macros beginning with `%' are not callable, and are parsed only for the trade name macro which returns to its caller. (And not very predictably at the moment either.) The purpose is to allow trade names to be pretty printed in troffNs/NsXrditroff output.
Return Values
The `.Rv macro ' generates text for use in the Sx RETURN VALUES section.
Usage: .Rv [-std function]
`.Rv -std ' atexit will generate the following text:
Rv -std atexit
The -std option is valid only for manual page sections 2 and 3.
Trade Names (or Acronyms and Type Names)
The trade name macro is generally a small caps macro for all upper case words longer than two characters.
Usage: .symbol ...
- .DEC
- DEC
- .ASCII
- ASCII
The `.macro ' is parsed and is callable by other macros.
Extended Arguments
The `. ' and `. ' macros allow one to extend an argument list on a macro boundary. Argument lists cannot be extended within a macro which expects all of its arguments on one line such as `.[] 'Here is an example of `. ' using the space mode macro to turn spacing off:
.Sm off .It Xo Sy I Ar operation .No \en Ar count No \en .Xc .Sm on
Produces
- I operation \n count \n
.Sm off .It Cm S No / Ar old_pattern Xo .No / Ar new_pattern .No / Op Cm g .Xc .Sm on
Produces
- S / old_pattern / new_pattern / [g ]
.It Xo .Ic .ifndef .Oo \&! Oc Ns Ar variable .Op Ar operator variable ... .Xc
Produces
- .ifndef [! variable ] [operator variable ... ]
PAGE STRUCTURE DOMAIN
Section Headers
The first three `.section
' header macros list below are required in every man page. The remaining section headers are recommended at the discretion of the author writing the manual page. The `.macro
' can take up to nine arguments. It is parsed and but is not callable.- .
NAME
NAME
' macro is mandatory. If not specified, the headers, footers and page layout defaults will not be set and things will be rather unpleasant. The Sx NAME section consists of at least three items. The first is the `.man mdoc.samples ' name macro naming the subject of the man page. The second is the Name Description macro, `. - , ' which separates the subject name from the third item, which is the description. The description should be the most terse and lucid possible, as the space available is small. .Sh SYNOPSIS The Sx SYNOPSIS section describes the typical usage of the subject of a man page. The macros required are either `.Nm' , `.Cd' , `.Fn' , (and possibly `.Fo' , `.Fc' , `.Fd' , `.Ft' macros). The function name macro `.Fn' is required for manual page sections 2 and 3, the command and general name macro `.man mdoc.samples ' is required for sections 1, 5, 6, 7, 8. Section 4 manuals require a `.Nm' , `.Fd' or a `.Cd' configuration device usage macro. Several other macros may be necessary to produce the synopsis line as shown below:
cat [-benstuv ] [- ] file ...
The following macros were used:
.cat
.[-benstuv ]
.[- ]
.file ...
Note The macros `.[,] ' `.- ' and `.file ... ' recognize the pipe bar character `' so a command line such as:
".[-a | -b ]
will not go orbital. Troff normally interprets a as a special operator. See Sx PREDEFINED STRINGS for a usable character in other situations. .Sh DESCRIPTION In most cases the first text in the Sx DESCRIPTION section is a brief paragraph on the command, function or file, followed by a lexical list of options and respective explanations. To create such a list, the `.
- list-item '
- and `.
' begin-list, `.
' end-list macros are used (see Sx Lists and Columns below).
section
' headers are part of the preferred manual page layout and must be used appropriately to maintain consistency. They are listed in the order in which they would be used.- .
SEE ALSO
man(1), troff(1), mdoc(7)Important: Use the man command (% man) to see how a command is used on your particular computer.
