1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
|
/*
* Fake Perms VFS module. Implements passthrough operation of all VFS
* calls to disk functions, except for file permissions, which are now
* mode 0700 for the current uid/gid.
*
* Copyright (C) Tim Potter, 1999-2000
* Copyright (C) Alexander Bokovoy, 2002
* Copyright (C) Andrew Bartlett, 2002
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "config.h"
#include <stdio.h>
#include <sys/stat.h>
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif
#ifdef HAVE_DIRENT_H
#include <dirent.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <errno.h>
#include <string.h>
#include <includes.h>
#include <vfs.h>
static struct vfs_ops default_vfs_ops; /* For passthrough operation */
static struct smb_vfs_handle_struct *fake_perms_handle; /* use fake_perms_handle->data for storing per-instance private data */
static int fake_perms_stat(struct connection_struct *conn, const char *fname, SMB_STRUCT_STAT *sbuf)
{
int ret = default_vfs_ops.stat(conn, fname, sbuf);
if (ret == 0) {
extern struct current_user current_user;
if (S_ISDIR(sbuf->st_mode)) {
sbuf->st_mode = S_IFDIR | S_IRWXU;
} else {
sbuf->st_mode = S_IRWXU;
}
sbuf->st_uid = current_user.uid;
sbuf->st_gid = current_user.gid;
}
return ret;
}
static int fake_perms_fstat(struct files_struct *fsp, int fd, SMB_STRUCT_STAT *sbuf)
{
int ret = default_vfs_ops.fstat(fsp, fd, sbuf);
if (ret == 0) {
extern struct current_user current_user;
if (S_ISDIR(sbuf->st_mode)) {
sbuf->st_mode = S_IFDIR | S_IRWXU;
} else {
sbuf->st_mode = S_IRWXU;
}
sbuf->st_uid = current_user.uid;
sbuf->st_gid = current_user.gid;
}
return ret;
}
#if 0
static size_t fake_perms_fget_nt_acl(struct files_struct *fsp, int fd, struct security_descriptor_info **ppdesc)
{
return default_vfs_ops.fget_nt_acl(fsp, fd, ppdesc);
}
static size_t fake_perms_get_nt_acl(struct files_struct *fsp, const char *name, struct security_descriptor_info **ppdesc)
{
return default_vfs_ops.get_nt_acl(fsp, name, ppdesc);
}
static BOOL fake_perms_fset_nt_acl(struct files_struct *fsp, int fd, uint32 security_info_sent, struct security_descriptor_info *psd)
{
return default_vfs_ops.fset_nt_acl(fsp, fd, security_info_sent, psd);
}
static BOOL fake_perms_set_nt_acl(struct files_struct *fsp, const char *name, uint32 security_info_sent, struct security_descriptor_info *psd)
{
return default_vfs_ops.set_nt_acl(fsp, name, security_info_sent, psd);
}
static BOOL fake_perms_chmod_acl(struct connection_struct *conn, const char *name, mode_t mode)
{
return default_vfs_ops.chmod_acl(conn, name, mode);
}
static BOOL fake_perms_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode)
{
return default_vfs_ops.fchmod_acl(fsp, fd, mode);
}
static int fake_perms_sys_acl_get_entry(struct connection_struct *conn, SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
return default_vfs_ops.sys_acl_get_entry(conn, theacl, entry_id, entry_p);
}
static int fake_perms_sys_acl_get_tag_type(struct connection_struct *conn, SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
{
return default_vfs_ops.sys_acl_get_tag_type(conn, entry_d, tag_type_p);
}
static int fake_perms_sys_acl_get_permset(struct connection_struct *conn, SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
return default_vfs_ops.sys_acl_get_permset(conn, entry_d, permset_p);
}
static void *fake_perms_sys_acl_get_qualifier(struct connection_struct *conn, SMB_ACL_ENTRY_T entry_d)
{
return default_vfs_ops.sys_acl_get_qualifier(conn, entry_d);
}
static SMB_ACL_T fake_perms_sys_acl_get_file(struct connection_struct *conn, const char *path_p, SMB_ACL_TYPE_T type)
{
return default_vfs_ops.sys_acl_get_file(conn, path_p, type);
}
static SMB_ACL_T fake_perms_sys_acl_get_fd(struct files_struct *fsp, int fd)
{
return default_vfs_ops.sys_acl_get_fd(fsp, fd);
}
static int fake_perms_sys_acl_clear_perms(struct connection_struct *conn, SMB_ACL_PERMSET_T permset)
{
return default_vfs_ops.sys_acl_clear_perms(conn, permset);
}
static int fake_perms_sys_acl_add_perm(struct connection_struct *conn, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
return default_vfs_ops.sys_acl_add_perm(conn, permset, perm);
}
static char *fake_perms_sys_acl_to_text(struct connection_struct *conn, SMB_ACL_T theacl, ssize_t *plen)
{
return default_vfs_ops.sys_acl_to_text(conn, theacl, plen);
}
static SMB_ACL_T fake_perms_sys_acl_init(struct connection_struct *conn, int count)
{
return default_vfs_ops.sys_acl_init(conn, count);
}
static int fake_perms_sys_acl_create_entry(struct connection_struct *conn, SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry)
{
return default_vfs_ops.sys_acl_create_entry(conn, pacl, pentry);
}
static int fake_perms_sys_acl_set_tag_type(struct connection_struct *conn, SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype)
{
return default_vfs_ops.sys_acl_set_tag_type(conn, entry, tagtype);
}
static int fake_perms_sys_acl_set_qualifier(struct connection_struct *conn, SMB_ACL_ENTRY_T entry, void *qual)
{
return default_vfs_ops.sys_acl_set_qualifier(conn, entry, qual);
}
static int fake_perms_sys_acl_set_permset(struct connection_struct *conn, SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset)
{
return default_vfs_ops.sys_acl_set_permset(conn, entry, permset);
}
static int fake_perms_sys_acl_valid(struct connection_struct *conn, SMB_ACL_T theacl )
{
return default_vfs_ops.sys_acl_valid(conn, theacl );
}
static int fake_perms_sys_acl_set_file(struct connection_struct *conn, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
{
return default_vfs_ops.sys_acl_set_file(conn, name, acltype, theacl);
}
static int fake_perms_sys_acl_set_fd(struct files_struct *fsp, int fd, SMB_ACL_T theacl)
{
return default_vfs_ops.sys_acl_set_fd(fsp, fd, theacl);
}
static int fake_perms_sys_acl_delete_def_file(struct connection_struct *conn, const char *path)
{
return default_vfs_ops.sys_acl_delete_def_file(conn, path);
}
static int fake_perms_sys_acl_get_perm(struct connection_struct *conn, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
return default_vfs_ops.sys_acl_get_perm(conn, permset, perm);
}
static int fake_perms_sys_acl_free_text(struct connection_struct *conn, char *text)
{
return default_vfs_ops.sys_acl_free_text(conn, text);
}
static int fake_perms_sys_acl_free_acl(struct connection_struct *conn, SMB_ACL_T posix_acl)
{
return default_vfs_ops.sys_acl_free_acl(conn, posix_acl);
}
static int fake_perms_sys_acl_free_qualifier(struct connection_struct *conn, void *qualifier, SMB_ACL_TAG_T tagtype)
{
return default_vfs_ops.sys_acl_free_qualifier(conn, qualifier, tagtype);
}
#endif
/* VFS operations structure */
static vfs_op_tuple fake_perms_ops[] = {
/* NT File ACL operations */
#if 0
{fake_perms_fget_nt_acl, SMB_VFS_OP_FGET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_get_nt_acl, SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_fset_nt_acl, SMB_VFS_OP_FSET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_set_nt_acl, SMB_VFS_OP_SET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
/* POSIX ACL operations */
{fake_perms_chmod_acl, SMB_VFS_OP_CHMOD_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_fchmod_acl, SMB_VFS_OP_FCHMOD_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_entry, SMB_VFS_OP_SYS_ACL_GET_ENTRY, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_tag_type, SMB_VFS_OP_SYS_ACL_GET_TAG_TYPE, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_permset, SMB_VFS_OP_SYS_ACL_GET_PERMSET, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_qualifier, SMB_VFS_OP_SYS_ACL_GET_QUALIFIER, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_file, SMB_VFS_OP_SYS_ACL_GET_FILE, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_fd, SMB_VFS_OP_SYS_ACL_GET_FD, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_clear_perms, SMB_VFS_OP_SYS_ACL_CLEAR_PERMS, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_add_perm, SMB_VFS_OP_SYS_ACL_ADD_PERM, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_to_text, SMB_VFS_OP_SYS_ACL_TO_TEXT, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_init, SMB_VFS_OP_SYS_ACL_INIT, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_create_entry, SMB_VFS_OP_SYS_ACL_CREATE_ENTRY, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_set_tag_type, SMB_VFS_OP_SYS_ACL_SET_TAG_TYPE, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_set_qualifier, SMB_VFS_OP_SYS_ACL_SET_QUALIFIER, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_set_permset, SMB_VFS_OP_SYS_ACL_SET_PERMSET, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_valid, SMB_VFS_OP_SYS_ACL_VALID, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_set_file, SMB_VFS_OP_SYS_ACL_SET_FILE, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_set_fd, SMB_VFS_OP_SYS_ACL_SET_FD, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_delete_def_file, SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_perm, SMB_VFS_OP_SYS_ACL_GET_PERM, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_free_text, SMB_VFS_OP_SYS_ACL_FREE_TEXT, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_free_acl, SMB_VFS_OP_SYS_ACL_FREE_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_free_qualifier, SMB_VFS_OP_SYS_ACL_FREE_QUALIFIER, SMB_VFS_LAYER_TRANSPARENT},
#endif
{fake_perms_stat, SMB_VFS_OP_STAT, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_fstat, SMB_VFS_OP_FSTAT, SMB_VFS_LAYER_TRANSPARENT},
{NULL, SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
};
/* VFS initialisation - return initialized vfs_op_tuple array back to Samba */
static vfs_op_tuple *fake_perms_init(const struct vfs_ops *def_vfs_ops,
struct smb_vfs_handle_struct *vfs_handle)
{
DEBUG(3, ("Initialising default vfs hooks\n"));
memcpy(&default_vfs_ops, def_vfs_ops, sizeof(struct vfs_ops));
/* Remember vfs_handle for further allocation and referencing of private
information in vfs_handle->data
*/
fake_perms_handle = vfs_handle;
return fake_perms_ops;
}
int vfs_fake_perms_init(void)
{
return smb_register_vfs("fake_perms", fake_perms_init, SMB_VFS_INTERFACE_VERSION);
}
|
