.TH zvbi-chains 1 " " " " "VBI proxy wrapper"
.SH NAME
zvbi-chains - VBI proxy wrapper
.SH SYNOPSIS
.B zvbi-chains [ options ]
.SH DESCRIPTION
.B zvbi-chains
is a small wrapper which executes the VBI application given on the command
line while overloading several C library calls (such as open(2) and read(2))
so that the application can be forced to access VBI devices via the VBI
proxy instead of device files directly.

LD_PRELOAD is used to intercept C library calls and call functions in the
libzvbi-chain shared library instead. Parameters given on the command line
(e.g. device path) are passed to the library by means of environment
variables.
.SH OPTIONS
.TP
\fB-dev\fP path
Path of a VBI device from which to read data.
.TP
\fB-debug\fP level
Enables debug output: 0 = off (default); 1 = warnings, 2 = all messages.
.TP
\fB-help\fP
Print a short description of all command line options.

.SH SEE ALSO
zvbid(1), v4l-conf(8)
.br
http://zapping.sourceforge.net/  (homepage)
.SH AUTHOR
Tom Zoerner (tomzo AT users.sourceforge.net)
.SH COPYRIGHT
Copyright (C) 2003, 2004 Tom Zoerner

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.