kernel/syscall/chown.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
  27 /*        All Rights Reserved   */
  28
  29 /*
  30  * Portions of this source code were derived from Berkeley 4.3 BSD
  31  * under license from the Regents of the University of California.
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/isa_defs.h>
  36 #include <sys/types.h>
  37 #include <sys/sysmacros.h>
  38 #include <sys/systm.h>
  39 #include <sys/errno.h>
  40 #include <sys/fcntl.h>
  41 #include <sys/pathname.h>
  42 #include <sys/var.h>
  43 #include <sys/vfs.h>
  44 #include <sys/vnode.h>
  45 #include <sys/file.h>
  46 #include <sys/mode.h>
  47 #include <sys/proc.h>
  48 #include <sys/uio.h>
  49 #include <sys/filio.h>
  50 #include <sys/fcntl.h>
  51 #include <sys/debug.h>
  52 #include <c2/audit.h>
  53
  54 /*
  55  * Change ownership of file.
  56  */
  57 int
  58 fchownat(int fd, char *path, uid_t uid, gid_t gid, int flag)
  59 {
  60         struct vattr    vattr;
  61         int             error;
  62         struct zone     *zone = crgetzone(CRED());
  63
  64         if (uid != (uid_t)-1 && !VALID_UID(uid, zone) ||
  65             gid != (gid_t)-1 && !VALID_GID(gid, zone)) {
  66                 return (set_errno(EINVAL));
  67         }
  68         vattr.va_uid = uid;
  69         vattr.va_gid = gid;
  70         vattr.va_mask = 0;
  71         if (vattr.va_uid != -1)
  72                 vattr.va_mask |= AT_UID;
  73         if (vattr.va_gid != -1)
  74                 vattr.va_mask |= AT_GID;
  75
  76         error = fsetattrat(fd, path, flag, &vattr);
  77         if (error)
  78                 return (set_errno(error));
  79         return (0);
  80 }