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document -s option with -D; PR#1374

.\" $OpenBSD: useradd.8,v 1.9 2000/08/25 16:37:28 jakob Exp $ */
.\" $NetBSD: useradd.8,v 1.5 2000/02/28 05:10:57 enami Exp $ */
.\"
.\"
.\" Copyright (c) 1999 Alistair G. Crooks.  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 Alistair G. Crooks.
.\" 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 AUTHOR ``AS IS'' AND ANY EXPRESS
.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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.\" 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,
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.\"
.Dd November 30, 1999
.Dt USERADD 8
.Os
.Sh NAME
.Nm useradd
.Nd add a user to the system
.Sh SYNOPSIS
.Nm useradd
.Op Fl D
.Op Fl b Ar base-dir
.Op Fl e Ar expiry-time
.Op Fl f Ar inactive-secs
.Op Fl g Ar gid/name/=uid
.Op Fl r Ar low..high
.Op Fl s Ar shell
.Nm useradd
.Op Fl G Ar secondary-group[,group,...]
.Op Fl b Ar base-dir
.Op Fl c Ar comment
.Op Fl d Ar home-dir
.Op Fl e Ar expiry-time
.Op Fl f Ar inactive-secs
.Op Fl g Ar gid/name/=uid
.Op Fl k Ar skel-dir
.Op Fl m
.Op Fl o
.Op Fl p Ar password
.Op Fl r Ar low..high
.Op Fl s Ar shell
.Op Fl u Ar uid
.Op Fl v
.Ar user
.Sh DESCRIPTION
The
.Nm useradd
utility adds a user to the system, creating and
populating a home directory if necessary.
Any skeleton dot files will be provided
for the new user if they exist in the
.Pa /etc/skel
directory.
Default values for the base directory, the time of password expiry,
the skeleton directory,
seconds until password change, primary group, the range from which the uid will be
allocated,
and default login shell can be provided in the
.Pa /etc/usermgmt.conf
file.
.Pp
The first format of the command shown above (utilising the -D option)
sets and displays the defaults for the
.Nm
utility.
.Bl -tag -width Ds
.It Fl D
without any further options, -D will show the current defaults which
will be used by the
.Nm
utility. Together with one of the options shown for the first version
of the command, -D will set the default to be the new value.
.It Fl b Ar base-dir
sets the base directory. This is the directory to which the user name
is added, which will be created if the -m option is specified and no
-d option is specified.
.It Fl e Ar expiry-time
sets the time at which the current password will expire for this user.
.It Fl f Ar inactive-secs
sets the number of seconds after which, if no login has occurred for
the user during that time, the login will be "locked".
.It Fl g Ar gid/groupname/=uid
sets the default group for any user added using the
.Nm
command.
.It Fl r Ar low..high
sets the low and high bounds of uid ranges for new users. A new user
can only be created if there are uids which can be assigned from one
of the free ranges.
.It Fl s Ar shell
sets the login shell for new users.
.El
.Pp
In the second form of the command,
after setting any defaults, and then values from that file,
the command line options are processed:
.Bl -tag -width Ds
.It Fl G Ar secondary-group[,group,...]
is the secondary groups to which the user will be added in the
.Pa /etc/group
file.
.It Fl b Ar base-directory
is the base directory name, in which the user's new home
directory will be created, should the -m option be specified.
This value can be preset for all users
by using the
.Ar base_dir
field in the
.Pa /etc/usermgmt.conf
file - it has the format:
.Ar base_dir <path-to-base-dir> .
.It Fl c Ar comment
is the comment field (also, for historical reasons known as the
GECOS field) which will be added for the user, and typically will include
the username, and, perhaps, contact information for the user.
.It Fl d Ar home-directory
is the home directory which will be created and populated for the user,
should the -m option be specified.
.It Fl e Ar secs-to-expiry
provides the number of seconds since the epoch (UTC) at
which the current password change expire. This
can be used to implement password aging.
A value of
0 can be used to switch off this feature.
The default value for this field is 0.
See
.Xr passwd 5
for more details.
This value can be preset for all users
by using the
.Ar expire
field in the
.Pa /etc/usermgmt.conf
file - it has the format:
.Ar expire <secs-to-expiry> .
.It Fl g Ar gid/name/=uid
gives the group name or identifier to be used for the new user's primary group.
If this is
.Ar "-g=uid" ,
then a uid and gid will be picked which are both unique
and the same, and a line added to
.Pa /etc/group
to describe the new group.
This value can be preset for all users
by using the
.Ar gid
field in the
.Pa /etc/usermgmt.conf
file - it has the format:
.Ar group <groupname/groupid/=uid> .
.It Fl k Ar skeleton directory
gives the skeleton directory in which to find dot files
with which to populate the new user's home directory.
.It Fl m
create a new home directory for the new user.
.It Fl o
allow the new user to have a uid which is already in use for another user.
.It Fl p Ar password
specifies an already-encrypted password for the new user.
This password can then be changed by using the
.Xr chpass 1
utility.
This value can be preset for all users
by using the
.Ar password
field in the
.Pa /etc/usermgmt.conf
file - it has the format:
.Ar password <encrypted-password> .
.It Fl s Ar shell
specifies the login shell for the new user.
This value can be preset for all users
by using the
.Ar shell
field in the
.Pa /etc/usermgmt.conf
file - it has the format:
.Ar shell <login-shell> .
.It Fl u Ar uid
specifies a uid for the new user.
Boundaries for this value can be preset for all users
by using the
.Ar range
field in the
.Pa /etc/usermgmt.conf
file - they have the format:
.Ar range <starting-uid>..<ending-uid> .
.It Fl v
enables verbose mode - explain the commands as they are executed.
.El
.Pp
The
.Nm
utility exits 0 on success, and >0 if an error occurs.
.Sh FILES
.Bl -tag -width /etc/usermgmt.conf -compact
.It Pa /etc/usermgmt.conf
.It Pa /etc/skel/.[A-z]*
.El
.Sh SEE ALSO
.Xr chpass 1 ,
.Xr passwd 5 ,
.Xr group 5 ,
.Xr user 8 ,
.Xr userdel 8 ,
.Xr usermod 8
.Sh HISTORY
The
.Nm
utility first appeared in
.Ox 2.7 .
.Sh AUTHOR
The
.Nm
utility was written by Alistair G. Crooks (agc@netbsd.org).