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.\"     @(#)chroot.8	8.1 (Berkeley) 6/9/93
.\" $FreeBSD$
.\"
.Dd June 7, 2003
.Dt CHROOT 8
.Os
.Sh NAME
.Nm chroot
.Nd change root directory
.Sh SYNOPSIS
.Nm
.Op Fl u Ar user
.Op Fl g Ar group
.Op Fl G Ar group,group,...
.Ar newroot
.Op Ar command
.Sh DESCRIPTION
The
.Nm
utility changes its current and root directories to the supplied directory
.Ar newroot
and then exec's
.Ar command ,
if supplied,
or an interactive copy of the user's login shell.
.Pp
If the
.Fl u ,
.Fl g
or
.Fl G
options are given,
the user,
group and group list of the process are set to
these values after the
.Nm
has taken place.
.Sh ENVIRONMENT
The following environment variable is referenced by
.Nm :
.Bl -tag -width ".Ev SHELL"
.It Ev SHELL
If set,
the string specified by
.Ev SHELL
is interpreted as the name of
the shell to exec.
If the variable
.Ev SHELL
is not set,
.Pa /bin/sh
is used.
.El
.Sh SEE ALSO
.Xr chdir 2 ,
.Xr chroot 2 ,
.Xr setgid 2 ,
.Xr setgroups 2 ,
.Xr setuid 2 ,
.Xr getgrnam 3 ,
.Xr environ 7 ,
.Xr jail 8
.Sh HISTORY
The
.Nm
utility first appeared in
.Bx 4.4 .