.\" $Id$ .\" .\" Copyright (c) 2009 Kristaps Dzonsons .\" .\" Permission to use, copy, modify, and distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. .\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" .Dd $Mdocdate$ .Dt MANUALS 7 .Os .\" SECTION .Sh NAME .Nm Writing UNIX Documentation .Nd a guide to writing UNIX manuals .\" SECTION .Sh DESCRIPTION .Em A utility without good documentation is of no utility at all . .\" PARAGRAPH .Pp A system component's documentation describes the utility of that component, whether it's a device driver, an executable or, most importantly, a game. .Pp This document serves as a tutorial to writing .Ux documentation .Pq Dq manuals . .\" SECTION .Sh ENVIRONMENT First, copy over the manual template from .Pa /usr/share/misc/mdoc.template into your source directory. .Pp .Dl % cp /usr/share/misc/mdoc.template \. .Pp .Em \&Do not start afresh or by copying another manual unless you know exactly what you're doing! If the template doesn't exist, bug your administrator. .\" SUBSECTION .Ss Section Numbering Find an appropriate section for your manual. There may exist multiple manual names per section, so be specific: .Pp .\" LIST .Bl -tag -width "XXXXXXXXXXXX" -offset indent -compact .It Em Section .Em Description .It 1 operator utilities .It 2 system calls .It 3, 3p, 3f programming libraries (C, Perl, Fortran) .It 5 file and wire protocol formats .It 6 games .It 7 tutorials, documents and papers .It 8 administrator utilities .It 9 in-kernel routines .El .Pp If your manual falls into multiple categories, choose the most widely-used or, better, re-consider the topic of your manual to be more specific. You can list all manuals per section by invoking .Xr apropos 1 , then provide the .Fl s flag to .Xr man 1 to see the specific section manual (section 1, in this example): .\" DISPLAY .Bd -literal -offset indent % apropos myname myname (1) - utility description myname (3) - library description % man \-s 1 myname .Ed .\" SUBSECTION .Ss Naming Name your component. Be terse, erring on the side of clarity. Look for other manuals by that same name before committing: .Pp .Dl % apropos myname .Pp Manual files are named .Pa myname.mysection , such as .Pa manuals.7 for this document. Rename the template file: .Pp .Dl % mv mdoc.template myname.mysection .\" SUBSECTION .Ss Development Tools While writing, make sure that your manual is correctly structured: .Pp .Dl % mandoc \-Tlint \-Wall \-fstrict name.1 .Pp The quick-fix feature of .Xr vim 1 is useful for checking over many manuals: .Bd -literal -offset indent % mandoc \-Wall \-fstrict \-Tlint \-fign-errors \e `find /usr/src \-name \e*\e.[1-9]` 2>&1 | \e sed 's!^mandoc: !!' > /tmp/mandoc.errs % vim -q /tmp/mandoc.errs .Ed .Pp You may spell-check your work as follows: .Pp .Dl % deroff name.1 | spell .Pp If .Xr ispell 1 is installed, it has a special mode for manuals: .Pp .Dl % ispell \-n name.1 .Pp Use .Xr cvs 1 or .Xr rcs 1 to version-control your work. If you wish the last check-in to effect your document's date, use the following RCS tag for the date macro: .Pp .Dl \&.Dd $Mdocdate$ .\" SUBSECTION .Ss Viewing mdoc documents may be paged to your terminal with .Xr mandoc 1 . If you plan on distributing your work to systems without this tool, check it against .Xr groff 1 : .Bd -literal -offset indent % mandoc \-Wall name.1 2>&1 | less % groff -mandoc name.1 2>&1 | less .Ed .\" SUBSECTION .Ss Automation Consider adding your mdoc documents to .Xr make 1 Makefiles in order to automatically check your input: .Bd -literal -offset indent \&.SUFFIXES: .1 .in \&.in.1: mandoc -Wall,error -Tlint $< cp -f $< $@ .Ed .\" SUBSECTION .Ss Licensing Your manual must have a license. It should be listed at the start of your document, just as in source code. .\" SECTION .Sh COMPOSITION Manuals should .Em always be written in the .Xr mdoc 7 formatting language. .\" PARAGRAPH .Pp Open the template you've copied into .Pa myname.mysection and begin editing. .\" SUBSECTION .Ss Language .Bl -enum .It Use clear, concise language. Favour simplicity. .It Write your manual in non-idiomatic English. Don't worry about Commonwealth or American spellings \(em just correct ones. .It Spell-check your manual, keeping in mind short-letter terms ( .Xr iwi 4 vs. .Xr iwn 4 ) . .It If you absolutely must use special characters (diacritics, mathematical symbols and so on), use the escapes dictated in .Xr mdoc 7 . .El .\" SUBSECTION .Ss Style The structure of the mdoc language makes it very hard to have any particular format style. Keep your lines under 72 characters in length. If you must have long option lines, use .Sq \&Oo/Oc . The same goes for function prototypes. .Em \&Do not use .Sq \&Xo/Xc . Find another way to structure your line. .\" SUBSECTION .Ss References Other components may be referenced with the .Sq \&Xr and .Sq \&Sx macros. Make sure that these exist. If you intend to distribute your manual, make sure .Sq \&Xr references are valid across systems (within reason). If you cross-link with .Sq \&Sx , make sure that the section reference exists. .\" SUBSECTION .Ss Citations Cite your work. If your system references standards documents or other publications, please use the .Sq \&Rs/Re block macros. .\" SUBSECTION .Ss Formatting .Em Don't style your manual . Give it meaningful content. The front-end will worry about formatting and style. .\" SECTION .Sh MAINTENANCE As your component changes and bugs are fixed, your manual may become out of date. You may be tempted to use tools like Doxygen to automate the development of your manuals. Don't. .Pp .Em Manuals are part of a system component : if you modify your code or specifications, modify the documentation.