.\"	$NetBSD: pkgvi.1,v 1.10 2013/07/20 21:50:53 wiz Exp $
.\"
.\" Copyright (c) 2001 Tomasz Luchowski. 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 Tomasz Luchowski
.\"	for the NetBSD Project
.\" 4. The name of the author may not be used to endorse or promote products
.\"    derived from this software without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd August 1, 2006
.Dt PKGVI 1
.Os
.Sh NAME
.Nm pkgvi
.Nd "run editor and make backup of given file if necessary"
.Sh SYNOPSIS
.Nm
.Op +command
.Ar file
.Sh DESCRIPTION
The
.Nm
utility runs the user's favourite editor
on a copy of specified file.
If no changes are made in the editor, nothing happens.
Else the original file is kept as
.Pa filename.orig ,
and the modified file
is saved as
.Pa filename .
If
.Nm
finds
.Pa filename.orig ,
it behaves as normal editor and changes are only made to
.Pa filename ,
not affecting
.Pa filename.orig .
In both cases
.Nm
ensures that the file to be edited is writable by the user.
.Pp
Available option:
.Bl -tag -width indent
.It Cm +command
This option is passed unmodified as first argument to the editor.
This is useful when the editor used is
.Xr vi 1 .
.El
.Sh ENVIRONMENT
.Nm
uses $PKGEDITOR if defined, then it looks for $EDITOR,
if neither is defined, it uses
.Xr vi 1 .
.Sh SEE ALSO
.Xr pkgdiff 1
.Sh AUTHORS
The pkgvi utility was written by
.An Tomasz Luchowski Aq Mt zuntum@netbsd.org .