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.\"
.\" Copyright (c) 1996, 1997 Shigio Yamaguchi. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by Shigio Yamaguchi.
.\" 4. Neither the name of the author nor the names of any co-contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd June 28, 1997
.Dt HTAGS 1
.Os BSD 4
.Sh NAME
.Nm htags
.Nd generate hypertext from C and Yacc source code
.Sh SYNOPSIS
.Nm htags
.Op Fl a
.Op Fl f
.Op Fl l
.Op Fl n
.Op Fl v
.Op Fl w
.Op Fl d Ar tagdir
.Op Fl t Ar title
.Op Ar dir
.Sh DESCRIPTION
.Nm Htags
makes hypertext from C and Yacc source code using GLOBAL database (GTAGS, GRTAGS).
.Pp
In advance of using this command, you must execute
.Xr gtags 1
at the root directory of the source tree.
Then you can execute
.Nm htags
at the same place.
.Nm Htags
makes HTML directory and generate hypertext in it.
.Pp
You can start browsing from 'HTML/index.html'.
Once hypertext generated, you can move it anywhere and browse it
by any browsers.
.Pp
.br
.Bl -tag -width Ds
.It Fl a
make an alphabetical function index. It's suitable for large project.
.It Fl f
support input form and dynamic index by CGI program.
You need to setup HTTP server for it.
.It Fl l
make name tag(<A NAME=line number>) for each line so that outer hypertext
can point any line of this hypertext.
By default, make it only for lines which have referred object.
.It Fl n
print line number. By default, doesn't print it.
.It Fl v
verbose mode.
.It Fl w
print warning message.
.It Fl d Ar tagdir
the directory in which GTAGS and GRTAGS exist. Default is current directory.
.It Fl t Ar title
Tile of this hypertext. Default is the last component of current path.
.It Ar dir
the directory in which hypertext generated. Default is current directory.
.Sh EXAMPLES
  % cd /usr/src/sys
  # gtags -se
  # htags -fnvat 'Welcom to FreeBSD kernel source tour!'
  % lynx HTML/index.html
.Sh FILES
.Bl -tag -width tags -compact
.It Pa HTML/index.html
Index file.
.It Pa GTAGS
tags file for function definitions.
.It Pa GRTAGS
tags file for function references.
.El
.Sh ENVIRONMENT
The following environment variables affect the execution of htags.
.Pp
.Bl -tag -width indent
.It Ev TMPDIR
If this variable is set, its value is used as the directory to make temporary file.
Default is /tmp.
.Sh DIAGNOSTICS
.Nm Htags
exits with a value of 1 if an error occurred, 0 otherwise.
.Sh SEE ALSO
.Xr btreeop 1 ,
.Xr gctags 1 ,
.Xr global 1 ,
.Xr gtags 1 .
.Sh BUG
Generated hypertext is VERY LARGE. In advance, check the space of your disk.
.Sh AUTHORS
Shigio Yamaguchi (shigio@wafu.netgate.net)
.Sh HISTORY
The
.Nm
command appeared in FreeBSD 2.2.