xref: /illumos-gate/usr/src/uts/common/syscall/chmod.c (revision 6a634c9d)
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
fchmodat(int fd,char * path,int mode,int flag)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
chmod(char * path,int mode)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
fchmod(int fd,int mode)82 fchmod(int fd, int mode)
83 {
84 	return (fchmodat(fd, NULL, mode, 0));
85 }
86