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+.\" Copyright (c) 1983, 1991, 1993
+.\"	The Regents of the University of California.  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 the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may 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
+.\" 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.
+.\"
+.\"     @(#)vipw.8	8.1 (Berkeley) 6/6/93
+.\"
+.Dd June 6, 1993
+.Dt VIPW 8
+.Os BSD 4
+.Sh NAME
+.Nm vipw
+.Nd edit the password file
+.Sh SYNOPSIS
+.Nm vipw
+.Sh DESCRIPTION
+.Nm Vipw
+edits the password file after setting the appropriate locks,
+and does any necessary processing after the password file is unlocked.
+If the password file is already locked for editing by another user,
+.Nm vipw
+will ask you
+to try again later. The default editor for
+.Nm vipw
+is
+.Xr vi 1 .
+.Pp
+.Nm Vipw
+performs a number of consistency checks on the password entries,
+and will not allow a password file with a
+.Dq mangled
+entry to be
+installed.
+If
+.Nm vipw
+rejects the new password file, the user is prompted to re-enter
+the edit session.
+.Pp
+Once the information has been verified,
+.Nm vipw
+uses
+.Xr pwd_mkdb 8
+to update the user database.  This is run in the background, and,
+at very large sites could take several minutes.  Until this update
+is completed, the password file is unavailable for other updates
+and the new information is not available to programs.
+.Sh ENVIRONMENT
+If the following environment variable exists it will be utilized by
+.Nm vipw :
+.Bl -tag -width EDITOR
+.It Ev EDITOR
+The editor specified by the string
+.Ev EDITOR
+will be invoked instead of the default editor
+.Xr vi 1 .
+.El
+.Sh SEE ALSO
+.Xr chpass 1 ,
+.Xr passwd 1 ,
+.Xr passwd 5 ,
+.Xr adduser 8 ,
+.Xr pwd_mkdb 8
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.0 .