.SH DESCRIPTION
.B really
checks whether the caller is allowed, and if it is it changes its uids
-and gids according to the command line options and executes the
-specified command.
+and gids (and perhaps root directory) according to the command line
+options and executes the specified command.
.PP
If no options are specified, the uid will be set to 0 and the gids
-will be left unchanged.
+and root directory will be left unchanged.
.PP
If no command is specified,
.B really
.BR "$SHELL -i" .
.PP
A caller is allowed if it has write access to
-.BR /etc/inittab .
-This is most easily achieved by creating or using a suitable group,
-containing all the appropriate users, and making
+.BR /etc/inittab
+and is also member of the group
+.BR root .
+This is most easily achieved by making inittab group-writeable by some
+suitable group containing all the appropriate users, and making
.B /etc/inittab
-group-owned by that group and group-writeable.
+group-owned by that group and group-writeable. The root group is
+perhaps a good choice if it isn't being used for anything else.
.SH OPTIONS
.TP
\fB-u\fR \fIusername\fR | \fB--user\fR \fIusername\fR
.B -z
in the argument list is not relevant.
.TP
+\fB-R\fR \fIroot-dir\fR | \fB--chroot\fR \fIroot-dir\fR
+The program will have its root directory set to
+.IR root-dir .
+
+.BR "Do not use this option unless you know what you are doing" :
+Unlike chroot(8), the current working directory will remain unchanged.
+This means that if the current directory isn't underneath the
+specified new root, the program will still be able to access files
+outside the new root by using relative pathnames. If this isn't
+what you want, please use the chroot utility instead.
+.TP
.B \-\-
Indicates the end of the options. The next argument (if present) will
be interpreted as the command name, even if it starts with a hyphen.
.B really
was written by Ian Jackson <ian@chiark.greenend.org.uk>.
.PP
-It and this manpage are Copyright (C) 1992-5,2003 Ian Jackson
+It and this manpage are Copyright (C) 1992-5,2004,2013 Ian Jackson
<ian@chiark.greenend.org.uk>.
.PP
.B really
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,
+published by the Free Software Foundation; either version 3,
or (at your option) any later version.
.PP
.B really
GNU General Public License for more details.
.PP
You should have received a copy of the GNU General Public
-License along with this file; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+License along with this file; if not, consult the Free Software
+Foundation's website at www.fsf.org, or the GNU Project website at
+www.gnu.org.
.SH AVAILABILITY
.B really
is currently part of