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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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
* or http://www.opensolaris.org/os/licensing.
* 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 (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/* 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.
*/
#include <sys/param.h>
#include <sys/isa_defs.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/fcntl.h>
#include <sys/pathname.h>
#include <sys/var.h>
#include <sys/vfs.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/mode.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/filio.h>
#include <sys/fcntl.h>
#include <sys/debug.h>
#include <c2/audit.h>
/*
* Change ownership of file.
*/
int
fchownat(int fd, char *name, uid_t uid, gid_t gid, int flags)
{
vnode_t *startvp, *vp;
file_t *filefp;
struct vattr vattr;
int error = 0;
char startchar;
struct zone *zone = crgetzone(CRED());
if (uid != (uid_t)-1 && !VALID_UID(uid, zone) ||
gid != (gid_t)-1 && !VALID_GID(gid, zone)) {
return (set_errno(EINVAL));
}
vattr.va_uid = uid;
vattr.va_gid = gid;
vattr.va_mask = 0;
if (vattr.va_uid != -1)
vattr.va_mask |= AT_UID;
if (vattr.va_gid != -1)
vattr.va_mask |= AT_GID;
if (fd == AT_FDCWD && name == NULL)
return (set_errno(EFAULT));
if (name != NULL) {
if (copyin(name, &startchar, sizeof (char)))
return (set_errno(EFAULT));
} else {
startchar = '\0';
}
if (fd == AT_FDCWD)
startvp = NULL;
else {
/*
* only get fd if not doing absolute lookup
*/
if (startchar != '/') {
if ((filefp = getf(fd)) == NULL)
return (set_errno(EBADF));
startvp = filefp->f_vnode;
VN_HOLD(startvp);
releasef(fd);
} else {
startvp = NULL;
}
}
if (AU_AUDITING() && (startvp != NULL))
audit_setfsat_path(1);
/*
* Do lookup for fchownat when name not NULL
*/
if (name != NULL) {
if (error = lookupnameat(name, UIO_USERSPACE,
(flags == AT_SYMLINK_NOFOLLOW) ?
NO_FOLLOW : FOLLOW,
NULLVPP, &vp, startvp)) {
if (startvp != NULL)
VN_RELE(startvp);
return (set_errno(error));
}
} else {
vp = startvp;
ASSERT(vp);
VN_HOLD(vp);
}
if (vn_is_readonly(vp)) {
error = EROFS;
} else {
error = VOP_SETATTR(vp, &vattr, 0, CRED(), NULL);
}
if (startvp != NULL)
VN_RELE(startvp);
if (vp != NULL)
VN_RELE(vp);
if (error != 0)
return (set_errno(error));
else
return (error);
}
int
chown(char *fname, uid_t uid, gid_t gid)
{
return (fchownat(AT_FDCWD, fname, uid, gid, 0));
}
int
lchown(char *fname, uid_t uid, gid_t gid)
{
return (fchownat(AT_FDCWD, fname, uid, gid, AT_SYMLINK_NOFOLLOW));
}
int
fchown(int fd, uid_t uid, uid_t gid)
{
return (fchownat(fd, NULL, uid, gid, 0));
}
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