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Mandoc fix.

.\" $Id: mdocterm.1,v 1.25 2009/03/17 00:40:17 kristaps Exp $
.\"
.\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@openbsd.org>
.\"
.\" 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: March 17 2009 $
.Dt mdocterm 1
.Os
.\" SECTION
.Sh NAME
.Nm mdocterm
.Nd mdoc macro compiler
.\" SECTION
.Sh SYNOPSIS
.Nm mdocterm
.Op Fl vV
.Op Fl f Ns Ar option...
.Op Fl O Ns Ar option...
.Op Fl W Ns Ar err...
.Op Ar infile
.Nm mdocterm
.Op Fl hi
.Op Fl m Ns Ar name
.Op Fl n Ns Ar num
.Op Fl o Ns Ar list
.Op Fl r Ns Ar cn
.Op Fl T Ns Ar name
.Op Ar infile
.\" SECTION
.Sh DESCRIPTION
The
.Nm
utility formats a BSD 
.Dq mdoc 
manual page for display on the terminal.  The arguments are as follows:
.Bl -tag -width XXXXXXXXXXXX
.\" ITEM
.It Fl v
Print verbose parsing output.
.\" ITEM
.It Fl v
Print version and exit.
.\" ITEM
.It Fl f Ns Ar option...
Override default compiler behaviour.  See 
.Sx Compiler Options
for details.
.\" ITEM
.It Fl O Ns Ar option...
Front-end options.  See
.Sx Front-end Options
for details.
.\" ITEM
.It Fl W Ns Ar err...
Print warning messages.  May be set to 
.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 
.Fl W
arguments may be comma-separated, such as
.Fl W Ns Ar error,all .
.\" ITEM
.It Ar infile
Read input from
.Ar infile ,
which may be 
.Dq \-
for stdin.
.El
.\" PARAGRAPH
.Pp
If
.Xr nroff 1
arguments are supplied on the command line
.Pq Fl himnorT ,
these are ignored unless 
.Xr nroff 1
is invoked on parse failure.
.\" PARAGRAPH
.Pp
The
.Nm
utility is a formatting front-end for
.Xr mdoc 3 ,
which parses the 
.Dq mdoc
input, documented at
.Xr mdoc 7
and
.Xr mdoc.samples 7 ,
into an abstract syntax tree.  
.\" PARAGRAPH
.Pp
By default, 
.Nm 
reads from stdin and prints nroff 
.Qq backspace
terminal-encoded output to stdout, at this time to a fixed column with
of 78 characters.  If
.Ar infile
can't be parsed (isn't valid mdoc, doesn't contain valid syntax, etc.),
.Xr nroff 1
is invoked.  If no 
.Xr nroff 1
command-line argumnets aren't provided,
.Fl m Ns Ar andoc
is implied.
.\" PARAGRAPH
.Pp
.Ex -std mdocterm
.\" SUB-SECTION
.Ss Front-end Options
The default behaviour may be overriden with the
.Fl O
flag.  The available options are as follows:
.Bl -tag -width XXXXXXXXXXXX -offset XXXX
.It Fl O Ns Ar nopunt
Don't punt to 
.Xr nroff 1
if 
.Ar infile
may not be parsed.
.El
.\" SUB-SECTION
.Ss Compiler Options
Default compiler behaviour may be overriden with the
.Fl f
flag.  The available options are as follows:
.Bl -tag -width XXXXXXXXXXXX -offset XXXX
.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.
.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.
.El
.\" PARAGRAPH
.Pp
As with the
.Fl W
flag, multiple
.Fl f
and
.Fl O
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.
.\" SUB-SECTION
.Ss Character Escapes
The
.Nm
utility correctly renders all 
.Sx Special Characters
in
.Xr mdoc 7
in 7-bit ASCII.
.Pp
In the general sense, 
.Nm
will make a 
.Pq best-effort
to render complex characters; however, if a manual is using considerable
special characters, some meaning may be lost in translation.
.\" SECTION
.Sh EXAMPLES
To display this manual page:
.\" PARAGRAPH
.Pp
.D1 % mdocterm \-Wall,error mdocterm.1 
.\" PARAGRAPH
.Pp
To pipe a manual page to the pager:
.Pp
.D1 % mdocterm mdocterm.1 | less
.\" SECTION
.Sh SEE ALSO
.Xr mdoctree 1 ,
.Xr mdoclint 1 ,
.Xr mdoc 7 ,
.Xr mdoc 3
.\" 
.Sh AUTHORS
The
.Nm
utility was written by 
.An Kristaps Dzonsons Aq kristaps@openbsd.org .
.\" SECTION
.Sh CAVEATS
See
.Xr mdoc 3
for a list of bugs, caveats, and incomplete macros regarding the
document parse.
.Pp
The 
.Nm
utility doesn't yet know how to display the following:
.Pp
.Bl -bullet -compact
.It
The \-hang 
.Sq \&Bl
list is not yet supported.
.It
The \-literal and \-unfilled 
.Sq \&Bd
displays only accept text contents.
.It
The
.Sq \&Xo/Xc
pair isn't supported (and never will be).
.It
The
.Sq \&Sm
macro has no effect, yet.
.El