kernel/syscall/chmod.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 #include <sys/param.h>
  30 #include <sys/isa_defs.h>
  31 #include <sys/types.h>
  32 #include <sys/sysmacros.h>
  33 #include <sys/dirent.h>
  34 #include <sys/systm.h>
  35 #include <sys/errno.h>
  36 #include <sys/fcntl.h>
  37 #include <sys/pathname.h>
  38 #include <sys/vfs.h>
  39 #include <sys/vnode.h>
  40 #include <sys/file.h>
  41 #include <sys/mode.h>
  42 #include <sys/uio.h>
  43 #include <sys/filio.h>
  44 #include <sys/debug.h>
  45
  46 /*
  47  * Change mode of file.
  48  */
  49 int
  50 fchmodat(int fd, char *path, int mode, int flag)
  51 {
  52         struct vattr vattr;
  53         int error;
  54
  55         if (flag & ~AT_SYMLINK_NOFOLLOW)
  56                 return (set_errno(EINVAL));
  57
  58         if (flag & AT_SYMLINK_NOFOLLOW)
  59                 return (set_errno(EOPNOTSUPP));
  60
  61         vattr.va_mode = mode & MODEMASK;
  62         vattr.va_mask = AT_MODE;
  63         error = fsetattrat(fd, path, flag, &vattr);
  64         if (error)
  65                 return (set_errno(error));
  66         return (0);
  67 }
  68
  69 /*
  70  * Change mode of file given path name.
  71  */
  72 int
  73 chmod(char *path, int mode)
  74 {
  75         return (fchmodat(AT_FDCWD, path, mode, 0));
  76 }
  77
  78 /*
  79  * Change mode of file given file descriptor.
  80  */
  81 int
  82 fchmod(int fd, int mode)
  83 {
  84         return (fchmodat(fd, NULL, mode, 0));
  85 }