1/*
2 * Fake Perms VFS module.  Implements passthrough operation of all VFS
3 * calls to disk functions, except for file permissions, which are now
4 * mode 0700 for the current uid/gid.
5 *
6 * Copyright (C) Tim Potter, 1999-2000
7 * Copyright (C) Alexander Bokovoy, 2002
8 * Copyright (C) Andrew Bartlett, 2002
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25#include "includes.h"
26
27#undef DBGC_CLASS
28#define DBGC_CLASS DBGC_VFS
29
30static int fake_perms_stat(vfs_handle_struct *handle, connection_struct *conn, const char *fname, SMB_STRUCT_STAT *sbuf)
31{
32	int ret = -1;
33
34	ret = SMB_VFS_NEXT_STAT(handle, conn, fname, sbuf);
35	if (ret == 0) {
36		extern struct current_user current_user;
37
38		if (S_ISDIR(sbuf->st_mode)) {
39			sbuf->st_mode = S_IFDIR | S_IRWXU;
40		} else {
41			sbuf->st_mode = S_IRWXU;
42		}
43		sbuf->st_uid = current_user.uid;
44		sbuf->st_gid = current_user.gid;
45	}
46
47	return ret;
48}
49
50static int fake_perms_fstat(vfs_handle_struct *handle, files_struct *fsp, int fd, SMB_STRUCT_STAT *sbuf)
51{
52	int ret = -1;
53
54	ret = SMB_VFS_NEXT_FSTAT(handle, fsp, fd, sbuf);
55	if (ret == 0) {
56		extern struct current_user current_user;
57
58		if (S_ISDIR(sbuf->st_mode)) {
59			sbuf->st_mode = S_IFDIR | S_IRWXU;
60		} else {
61			sbuf->st_mode = S_IRWXU;
62		}
63		sbuf->st_uid = current_user.uid;
64		sbuf->st_gid = current_user.gid;
65	}
66	return ret;
67}
68
69/* VFS operations structure */
70
71static vfs_op_tuple fake_perms_ops[] = {
72	{SMB_VFS_OP(fake_perms_stat),	SMB_VFS_OP_STAT,	SMB_VFS_LAYER_TRANSPARENT},
73	{SMB_VFS_OP(fake_perms_fstat),	SMB_VFS_OP_FSTAT,	SMB_VFS_LAYER_TRANSPARENT},
74
75	{SMB_VFS_OP(NULL),		SMB_VFS_OP_NOOP,	SMB_VFS_LAYER_NOOP}
76};
77
78NTSTATUS vfs_fake_perms_init(void)
79{
80	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "fake_perms", fake_perms_ops);
81}
82