101 lines
2.9 KiB
Groff
101 lines
2.9 KiB
Groff
.\" $NetBSD: chroot.8,v 1.13 2010/07/06 23:05:56 jruoho Exp $
|
|
.\"
|
|
.\" Copyright (c) 1988, 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. 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.
|
|
.\"
|
|
.\" from: @(#)chroot.8 8.1 (Berkeley) 6/9/93
|
|
.\"
|
|
.Dd July 7, 2010
|
|
.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
|
|
command changes its root directory to the supplied directory
|
|
.Ar newroot
|
|
and exec's
|
|
.Ar command ,
|
|
if supplied, or an interactive copy of your 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 chroot has taken place. See
|
|
.Xr setgid 2 ,
|
|
.Xr setgroups 2 ,
|
|
.Xr setuid 2 ,
|
|
.Xr getgrnam 3
|
|
and
|
|
.Xr getpwnam 3 .
|
|
.Pp
|
|
Note,
|
|
.Ar command
|
|
or the shell are run as your real-user-id.
|
|
.Sh ENVIRONMENT
|
|
The following environment variable is referenced by
|
|
.Nm :
|
|
.Bl -tag -width 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 ldd 1 ,
|
|
.Xr chdir 2 ,
|
|
.Xr chroot 2 ,
|
|
.Xr environ 7
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
utility first appeared in
|
|
.Bx 4.4 .
|
|
.Sh SECURITY CONSIDERATIONS
|
|
.Nm
|
|
should never be installed setuid root, as it would then be possible
|
|
to exploit the program to gain root privileges.
|