Removed need for superfluous `os' value in overstep calculation (thanks Ingo Schwarze).

[mandoc.git] / mandoc.1

diff --git a/mandoc.1 b/mandoc.1
index 54f9233be9d8a9a03cc2ef9359d6f1906d859089..431be5a0ada9bdba403390912fca8f1c5573c317 100644 (file)
--- a/mandoc.1
+++ b/mandoc.1
@@ -1,81 +1,84 @@
-.\" $Id: mandoc.1,v 1.15 2009/04/12 19:30:45 kristaps Exp $
+.\"    $Id: mandoc.1,v 1.43 2009/10/15 02:42:53 kristaps Exp $

 .\"
 .\"

-.\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@openbsd.org>
+.\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>

 .\"
 .\" Permission to use, copy, modify, and distribute this software for any
 .\"
 .\" 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.
+.\" 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.
+.\" 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: April 12 2009 $
+.Dd $Mdocdate: October 15 2009 $

 .Dt MANDOC 1
 .Os
 .Dt MANDOC 1
 .Os

-.\" SECTION
+.
+.

 .Sh NAME
 .Nm mandoc
 .Nd format and display UNIX manuals
 .Sh NAME
 .Nm mandoc
 .Nd format and display UNIX manuals

-.\" SECTION
+.
+.

 .Sh SYNOPSIS
 .Nm mandoc
 .Sh SYNOPSIS
 .Nm mandoc

-.Op Fl V

 .Op Fl f Ns Ar option...
 .Op Fl m Ns Ar format
 .Op Fl f Ns Ar option...
 .Op Fl m Ns Ar format

-.Op Fl W Ns Ar err...
+.Op Fl o Ns Ar option...

 .Op Fl T Ns Ar output
 .Op Fl T Ns Ar output

+.Op Fl V
+.Op Fl W Ns Ar err...

 .Op Ar infile...
 .Op Ar infile...

-.\" SECTION
+.
+.

 .Sh DESCRIPTION
 The
 .Nm
 .Sh DESCRIPTION
 The
 .Nm

-utility formats 
+utility formats

 .Ux
 manual pages for display.  The arguments are as follows:
 .Ux
 manual pages for display.  The arguments are as follows:

-.Bl -tag -width XXXXXXXXXXXX
-.\" ITEM
+.
+.Bl -tag -width Ds

 .It Fl f Ns Ar option...
 .It Fl f Ns Ar option...

-Override default compiler behaviour.  See 
+Comma-separated compiler options.  See

 .Sx Compiler Options
 for details.
 .Sx Compiler Options
 for details.

-.\" ITEM
-.It Fl m
+.
+.It Fl m Ns Ar format

 Input format.  See
 .Sx Input Formats
 for available formats.  Defaults to
 .Fl m Ns Ar andoc .
 Input format.  See
 .Sx Input Formats
 for available formats.  Defaults to
 .Fl m Ns Ar andoc .

-.\" ITEM
-.It Fl T
+.
+.It Fl o Ns Ar option...
+Comma-separated output options.  See
+.Sx Output Options
+for details.
+.
+.It Fl T Ns Ar output

 Output format.  See
 .Sx Output Formats
 for available formats.  Defaults to
 .Fl T Ns Ar ascii .
 Output format.  See
 .Sx Output Formats
 for available formats.  Defaults to
 .Fl T Ns Ar ascii .

-.\" ITEM
+.

 .It Fl V
 Print version and exit.
 .It Fl V
 Print version and exit.

-.\" ITEM
+.

 .It Fl W Ns Ar err...
 .It Fl W Ns Ar err...

-Print warning messages.  May be set to 
+Comma-separated warning options.  Use

 .Fl W Ns Ar all
 .Fl W Ns Ar all

-for all warnings, 
-.Ar compat
-for groff/troff-compatibility warnings, or
-.Ar syntax
-for syntax warnings.  If
-.Fl W Ns Ar error 
-is specified, warnings are considered errors and cause utility
-termination.  Multiple 
+to print warnings,
+.Fl W Ns Ar error
+for warnings to be considered errors and cause utility
+termination.  Multiple

 .Fl W
 arguments may be comma-separated, such as
 .Fl W Ns Ar error,all .
 .Fl W
 arguments may be comma-separated, such as
 .Fl W Ns Ar error,all .

-.\" ITEM
+.

 .It Ar infile...
 Read input from zero or more
 .Ar infile .
 .It Ar infile...
 Read input from zero or more
 .Ar infile .


@@ -83,11 +86,11 @@ If unspecified, reads from stdin.  If multiple files are specified,
 .Nm
 will halt with the first failed parse.
 .El
 .Nm
 will halt with the first failed parse.
 .El

-.\" PARAGRAPH
+.

 .Pp
 .Pp

-By default, 
-.Nm 
-reads 
+By default,
+.Nm
+reads

 .Xr mdoc 7
 or
 .Xr man 7
 .Xr mdoc 7
 or
 .Xr man 7


@@ -96,41 +99,52 @@ text from stdin, implying
 and prints 78-column backspace-encoded output to stdout as if
 .Fl T Ns Ar ascii
 were provided.
 and prints 78-column backspace-encoded output to stdout as if
 .Fl T Ns Ar ascii
 were provided.

-.\" PARAGRAPH
+.

 .Pp
 .Ex -std mandoc
 .Pp
 .Ex -std mandoc

-.\" SUB-SECTION
-.Ss Punctuation
+.
+.
+.Ss Punctuation and Spacing

 If punctuation is set apart from words, such as in the phrase
 .Dq to be \&, or not to be ,
 it's processed by
 .Nm
 If punctuation is set apart from words, such as in the phrase
 .Dq to be \&, or not to be ,
 it's processed by
 .Nm

-according to the following rules.  Opening punctuation
+according to the following rules:  opening punctuation

 .Po
 .Po

-.Sq \&( , 
-.Sq \&[ , 
+.Sq \&( ,
+.Sq \&[ ,

 and
 .Sq \&{
 and
 .Sq \&{

-.Pc 
-is not followed by a space. Closing punctuation
+.Pc
+is not followed by a space; closing punctuation

 .Po
 .Po

-.Sq \&. , 
-.Sq \&, , 
-.Sq \&; , 
-.Sq \&: , 
-.Sq \&? , 
-.Sq \&! , 
-.Sq \&) , 
-.Sq \&] 
+.Sq \&. ,
+.Sq \&, ,
+.Sq \&; ,
+.Sq \&: ,
+.Sq \&? ,
+.Sq \&! ,
+.Sq \&) ,
+.Sq \&]

 and
 .Sq \&}
 and
 .Sq \&}

-.Pc 
+.Pc

 is not preceded by whitespace.
 is not preceded by whitespace.

+.

 .Pp
 If the input is
 .Xr mdoc 7 ,
 these rules are also applied to macro arguments when appropriate.
 .Pp
 If the input is
 .Xr mdoc 7 ,
 these rules are also applied to macro arguments when appropriate.

-.\" SUB-SECTION
+.
+.Pp
+White-space, in non-literal (normal) mode, is stripped from input and
+replaced on output by a single space.  Thus, if you wish to preserve multiple
+spaces, they must be space-escaped or used in a literal display mode, e.g.,
+.Sq \&Bd \-literal
+in
+.Xr mdoc 7 .
+.
+.

 .Ss Input Formats
 The
 .Nm
 .Ss Input Formats
 The
 .Nm


@@ -146,146 +160,257 @@ respectively.  The
 .Xr mdoc 7
 format is
 .Em strongly
 .Xr mdoc 7
 format is
 .Em strongly

-recommended; 
+recommended;

 .Xr man 7
 should only be used for legacy manuals.
 .Xr man 7
 should only be used for legacy manuals.

+.

 .Pp
 A third option,
 .Fl m Ns Ar andoc ,
 which is also the default, determines encoding on-the-fly: if the first
 .Pp
 A third option,
 .Fl m Ns Ar andoc ,
 which is also the default, determines encoding on-the-fly: if the first

-non-comment macro is 
-.Sq \&.Dd
+non-comment macro is
+.Sq \&Dd

 or
 or

-.Sq \&.Dt ,
-the 
+.Sq \&Dt ,
+the

 .Xr mdoc 7
 parser is used; otherwise, the
 .Xr man 7
 parser is used.
 .Xr mdoc 7
 parser is used; otherwise, the
 .Xr man 7
 parser is used.

+.

 .Pp
 If multiple
 .Pp
 If multiple

-files are specified with 
-.Fl m Ns Ar andoc , 
+files are specified with
+.Fl m Ns Ar andoc ,

 each has its file-type determined this way.  If multiple files are
 specified and
 .Fl m Ns Ar doc
 or
 .Fl m Ns Ar an
 is specified, then this format is used exclusively.
 each has its file-type determined this way.  If multiple files are
 specified and
 .Fl m Ns Ar doc
 or
 .Fl m Ns Ar an
 is specified, then this format is used exclusively.

-.\" .Pp
-.\" The following escape sequences are recognised, although the per-format
-.\" compiler may not allow certain sequences.
-.\" .Bl -tag -width Ds -offset XXXX
-.\" .It \efX
-.\" sets the font mode to X (B, I, R or P, where P resets the font)
-.\" .It \eX, \e(XX, \e[XN]
-.\" queries the special-character table for a corresponding symbol
-.\" .It \e*X, \e*(XX, \e*[XN]
-.\" deprecated special-character format
-.\" .El
-.\" SUB-SECTION
+.
+.

 .Ss Output Formats
 The
 .Nm
 utility accepts the following
 .Fl T
 arguments:
 .Ss Output Formats
 The
 .Nm
 utility accepts the following
 .Fl T
 arguments:

-.Bl -tag -width XXXXXXXXXXXX 
+.
+.Bl -tag -width Ds

 .It Fl T Ns Ar ascii
 Produce 7-bit ASCII output, backspace-encoded for bold and underline
 styles.  This is the default.
 .It Fl T Ns Ar ascii
 Produce 7-bit ASCII output, backspace-encoded for bold and underline
 styles.  This is the default.

+.
+.It Fl T Ns Ar html
+Produce strict HTML-4.01 output, with a sane default style.
+.

 .It Fl T Ns Ar tree
 Produce an indented parse tree.
 .It Fl T Ns Ar tree
 Produce an indented parse tree.

+.

 .It Fl T Ns Ar lint
 Parse only: produce no output.
 .El
 .It Fl T Ns Ar lint
 Parse only: produce no output.
 .El

+.

 .Pp
 If multiple input files are specified, these will be processed by the
 corresponding filter in-order.
 .Pp
 If multiple input files are specified, these will be processed by the
 corresponding filter in-order.

-.\" SUB-SECTION
+.
+.

 .Ss Compiler Options
 .Ss Compiler Options

-Default compiler behaviour may be overriden with the
+Default compiler behaviour may be overridden with the

 .Fl f
 flag.
 .Fl f
 flag.

-.Bl -tag -width XXXXXXXXXXXXXX 
+.
+.Bl -tag -width Ds

 .It Fl f Ns Ar ign-scope
 When rewinding the scope of a block macro, forces the compiler to ignore
 scope violations.  This can seriously mangle the resulting tree.
 .Pq mdoc only
 .It Fl f Ns Ar ign-scope
 When rewinding the scope of a block macro, forces the compiler to ignore
 scope violations.  This can seriously mangle the resulting tree.
 .Pq mdoc only

-.It Fl f Ns Ar ign-escape
-Ignore invalid escape sequences.
-.It Fl f Ns Ar ign-macro
-Ignore unknown macros at the start of input lines (default for 
-.Xr man 7
-parsing).
+.
+.It Fl f Ns Ar no-ign-escape
+Don't ignore invalid escape sequences.
+.

 .It Fl f Ns Ar no-ign-macro
 .It Fl f Ns Ar no-ign-macro

-Do not ignore unknown macros at the start of input lines (default for 
-.Xr mdoc 7
-parsing).
+Do not ignore unknown macros at the start of input lines.
+.
+.It Fl f Ns Ar no-ign-chars
+Do not ignore disallowed characters.
+.
+.It Fl f Ns Ar strict
+Implies
+.Fl f Ns Ar no-ign-escape ,
+.Fl f Ns Ar no-ign-macro
+and
+.Fl f Ns Ar no-ign-chars .
+.
+.It Fl f Ns Ar ign-errors
+Don't halt when encountering parse errors.  Useful with
+.Fl T Ns Ar lint
+over a large set of manuals passed on the command line.

 .El
 .El

-.\" PARAGRAPH
-.Pp
-As with the
-.Fl W
-flag, multiple
-.Fl f
-options may be grouped and delimited with a comma.  Using
-.Fl f Ns Ar ign-scope,ign-escape ,
-for example, will try to ignore scope and character-escape errors.
-.\" SECTION
+.
+.Ss Output Options
+For the time being, only
+.Fl T Ns Ar html
+is the only mode with output options:
+.Bl -tag -width Ds
+.It Fl o Ns Ar style=style.css
+The file
+.Ar style.css
+is used for an external style-sheet.  This must be a valid absolute or
+relative URI.
+.It Fl o Ns Ar includes=fmt
+The string
+.Ar fmt ,
+for example, 
+.Ar ../src/%I.html ,
+is used as a template for linked header files (usually via the
+.Sq \&In
+macro).  Instances of
+.Sq \&%I
+are replaced with the include filename.  The default is not to present a
+hyperlink.
+.It Fl o Ns Ar man=fmt
+The string
+.Ar fmt ,
+for example, 
+.Ar ../html%S/%N.%S.html ,
+is used as a template for linked manuals (usually via the
+.Sq \&Xr
+macro).  Instances of
+.Sq \&%N
+and
+.Sq %S
+are replaced with the linked manual's name and section, respectively.
+If no section is included, section 1 is assumed.  The default is not to
+present a hyperlink.
+.El
+.

 .Sh EXAMPLES
 To page manuals to the terminal:
 .Sh EXAMPLES
 To page manuals to the terminal:

-.\" PARAGRAPH
-.Pp
-.D1 % mandoc \-Wall,error mandoc.1 2>&1 | less
+.

 .Pp
 .Pp

+.D1 % mandoc \-Wall,error \-fstrict mandoc.1 2>&1 | less

 .D1 % mandoc mandoc.1 mdoc.3 mdoc.7 | less
 .D1 % mandoc mandoc.1 mdoc.3 mdoc.7 | less

-.\" SECTION
-.Sh SEE ALSO
-.Xr mandoc_char 7 ,
-.Xr mdoc 7 ,
-.Xr man 7
-.\" 
-.Sh AUTHORS
-The
-.Nm
-utility was written by 
-.An Kristaps Dzonsons Aq kristaps@openbsd.org .
-.\" SECTION
-.Sh CAVEATS
-The 
-.Nm
-utility in
-.Fl T Ns Ar ascii
-mode doesn't yet know how to display the following:
+.

 .Pp
 .Pp

-.Bl -bullet -compact
-.It
-The \-hang 
-.Sq \&.Bl
-list is not yet supported.
-.El
+To produce HTML manuals with
+.Ar style.css
+as the style-sheet:

 .Pp
 .Pp

-Other macros still aren't supported by virtue of nobody complaining
-about their absence.  Please report any omissions: this is a work in
-progress.
+.D1 % mandoc \-Thtml -ostyle=style.css mdoc.7 > mdoc.7.html

 .Pp
 .Pp

-The following list documents differences between traditional
-.Xr nroff 1
-output and
-.Nm :
+To check over a large set of manuals:
+.

 .Pp
 .Pp

+.Dl % mandoc \-Tlint \-fign-errors `find /usr/src -name \e*\e.[1-9]`
+.
+.
+.Sh COMPATIBILITY
+This section summarises
+.Nm
+compatibility with
+.Xr groff 1 .
+Each input and output format is separately noted.
+.
+.
+.Ss ASCII output

 .Bl -bullet -compact
 .Bl -bullet -compact

-.It 
-A list of display following
-.Sq \&.Ss
+.It
+The 
+.Sq \e~
+special character doesn't produce expected behaviour in 
+.Fl T Ns Ar ascii .
+.
+.It
+The 
+.Sq \&Bd \-literal
+and 
+.Sq \&Bd \-unfilled
+macros of
+.Xr mdoc 7
+in
+.Fl T Ns Ar ascii
+are synonyms, as are \-filled and \-ragged.
+.
+.It
+In 
+.Xr groff 1 ,
+the
+.Sq \&Pa
+.Xr mdoc 7
+macro does not underline when scoped under an
+.Sq \&It
+in the FILES section.  This behaves correctly in
+.Nm .
+.
+.It
+A list or display following
+.Sq \&Ss
+.Xr mdoc 7
+macro in
+.Fl T Ns Ar ascii

 does not assert a prior vertical break, just as it doesn't with
 does not assert a prior vertical break, just as it doesn't with

-.Sq \&.Sh .
+.Sq \&Sh .
+.

 .It
 .It

-Special characters don't follow the current font style.
-.\" LIST-ITEM
+The
+.Sq \&na
+.Xr man 7
+macro in
+.Fl T Ns Ar ascii
+has no effect.
+.
+.It
+Words aren't hyphenated.
+.

 .It
 .It

-The \-literal and \-unfilled 
-.Sq \&.Bd
-displays types are synonyms, as are \-filled and \-ragged.
+In normal mode (not a literal block), blocks of spaces aren't preserved,
+so double spaces following sentence closure are reduced to a single space;
+.Xr groff 1
+retains spaces.
+.
+.It
+Sentences are unilaterally monospaced.

 .El
 .El

+.
+.Ss HTML output
+.Bl -bullet -compact
+.It
+The
+.Xr mdoc 7
+.Sq \&Bl \-hang
+and
+.Sq \&Bl \-tag
+list types render similarly (no break following overreached left-hand
+side) due to the expressive constraints of HTML.
+.
+.It
+The
+.Xr man 7
+.Sq IP
+and
+.Sq TP
+lists render similarly.
+.El
+.\" SECTION
+.Sh SEE ALSO
+.Xr mandoc_char 7 ,
+.Xr mdoc 7 ,
+.Xr man 7
+.
+.Sh AUTHORS
+The
+.Nm
+utility was written by
+.An Kristaps Dzonsons Aq kristaps@kth.se .
+.
+.Sh CAVEATS
+In
+.Fl T Ns Ar html ,
+the maximum size of an element attribute is determined by
+.Dv BUFSIZ ,
+which is usually 1024 bytes.  Be aware of this when setting long link
+formats with
+.Fl o Ns Ar man=fmt .