chdir.c revision c8343062f6e25afd9c2a31b65df357030e69fa55
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Portions of this source code were derived from Berkeley 4.3 BSD
* under license from the Regents of the University of California.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/isa_defs.h>
#include <sys/sysmacros.h>
#include <sys/pathname.h>
/*
* Change current working directory (".").
*/
int
{
int error;
goto lookup;
}
if (error) {
goto lookup;
}
return (0);
}
/*
* File-descriptor based version of 'chdir'.
*/
int
{
int error;
if (error)
return (0);
}
/*
* Change notion of root ("/") directory.
*/
int
{
int error;
goto lookup;
}
if (error) {
goto lookup;
}
return (0);
}
/*
* ++++++++++++++++++++++++
* ++ SunOS4.1 Buyback ++
* ++++++++++++++++++++++++
* Change root directory with a user given fd
*/
int
{
int error;
if (error)
return (0);
}
static int
{
int error;
int newcwd = 1;
goto bad;
}
goto bad;
/*
* The VOP_ACCESS() may have covered 'vp' with a new filesystem,
* if 'vp' is an autoFS vnode. Traverse the mountpoint so
* that we don't end up with a covered current directory.
*/
goto bad;
}
/*
* Special chroot semantics: chroot is allowed if privileged
* or if the target is really a loopback mount of the root (or
* root of the zone) as determined by comparing dev and inode
* numbers
*/
if (ischroot) {
goto bad;
goto bad;
goto bad;
} else {
}
#ifdef C2_AUDIT
if (audit_active) /* update abs cwd/root path see c2audit.c */
#endif
/*
* This bit of logic prevents us from overwriting u_cwd if we are
* changing to the same directory. We set the cwd to NULL so that we
* don't try to do the lookup on the next call to getcwd().
*/
newcwd = 0;
if (oldvp)
return (0);
bad:
return (error);
}