source3/modules/vfs_catia.c

   1 /*
   2  * Catia VFS module
   3  *
   4  * Implement a fixed mapping of forbidden NT characters in filenames that are
   5  * used a lot by the CAD package Catia.
   6  *
   7  * Yes, this a BAD BAD UGLY INCOMPLETE hack, but it helps quite some people
   8  * out there. Catia V4 on AIX uses characters like "<*$ a *lot*, all forbidden
   9  * under Windows...
  10  *
  11  * Copyright (C) Volker Lendecke, 2005
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 3 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  25  */
  26
  27
  28 #include "includes.h"
  29
  30 static char *catia_string_replace(TALLOC_CTX *ctx,
  31                         const char *s,
  32                         unsigned char oldc,
  33                         unsigned char newc)
  34 {
  35         smb_ucs2_t *tmpbuf = NULL;
  36         smb_ucs2_t *ptr = NULL;
  37         smb_ucs2_t old = oldc;
  38         char *ret = NULL;
  39         size_t converted_size;
  40
  41         if (!s) {
  42                 return NULL;
  43         }
  44
  45         if (!push_ucs2_talloc(ctx, &tmpbuf, s, &converted_size)) {
  46                 return NULL;
  47         }
  48
  49         ptr = tmpbuf;
  50
  51         for (;*ptr;ptr++) {
  52                 if (*ptr==old) {
  53                         *ptr=newc;
  54                 }
  55         }
  56
  57         if (!pull_ucs2_talloc(ctx, &ret, tmpbuf, &converted_size)) {
  58                 TALLOC_FREE(tmpbuf);
  59                 return NULL;
  60         }
  61         TALLOC_FREE(tmpbuf);
  62         return ret;
  63 }
  64
  65 static char *from_unix(TALLOC_CTX *ctx, const char *s)
  66 {
  67         char *ret = catia_string_replace(ctx, s, '\x22', '\xa8');
  68         ret = catia_string_replace(ctx, ret, '\x2a', '\xa4');
  69         ret = catia_string_replace(ctx, ret, '\x2f', '\xf8');
  70         ret = catia_string_replace(ctx, ret, '\x3a', '\xf7');
  71         ret = catia_string_replace(ctx, ret, '\x3c', '\xab');
  72         ret = catia_string_replace(ctx, ret, '\x3e', '\xbb');
  73         ret = catia_string_replace(ctx, ret, '\x3f', '\xbf');
  74         ret = catia_string_replace(ctx, ret, '\x5c', '\xff');
  75         ret = catia_string_replace(ctx, ret, '\x7c', '\xa6');
  76         return catia_string_replace(ctx, ret, ' ', '\xb1');
  77 }
  78
  79 static char *to_unix(TALLOC_CTX *ctx, const char *s)
  80 {
  81         char *ret = catia_string_replace(ctx, s, '\xa8', '\x22');
  82         ret = catia_string_replace(ctx, ret, '\xa4', '\x2a');
  83         ret = catia_string_replace(ctx, ret, '\xf8', '\x2f');
  84         ret = catia_string_replace(ctx, ret, '\xf7', '\x3a');
  85         ret = catia_string_replace(ctx, ret, '\xab', '\x3c');
  86         ret = catia_string_replace(ctx, ret, '\xbb', '\x3e');
  87         ret = catia_string_replace(ctx, ret, '\xbf', '\x3f');
  88         ret = catia_string_replace(ctx, ret, '\xff', '\x5c');
  89         ret = catia_string_replace(ctx, ret, '\xa6', '\x7c');
  90         return catia_string_replace(ctx, ret, '\xb1', ' ');
  91 }
  92
  93 static SMB_STRUCT_DIR *catia_opendir(vfs_handle_struct *handle,
  94                           const char *fname, const char *mask, uint32 attr)
  95 {
  96         char *name = to_unix(talloc_tos(), fname);
  97
  98         if (!name) {
  99                 errno = ENOMEM;
 100                 return NULL;
 101         }
 102         return SMB_VFS_NEXT_OPENDIR(handle, name, mask, attr);
 103 }
 104
 105 static SMB_STRUCT_DIRENT *catia_readdir(vfs_handle_struct *handle,
 106                                         SMB_STRUCT_DIR *dirp,
 107                                         SMB_STRUCT_STAT *sbuf)
 108 {
 109         SMB_STRUCT_DIRENT *result = NULL;
 110         SMB_STRUCT_DIRENT *newdirent = NULL;
 111         char *newname;
 112         size_t newnamelen;
 113
 114         result = SMB_VFS_NEXT_READDIR(handle, dirp, NULL);
 115         if (result == NULL) {
 116                 return result;
 117         }
 118
 119         newname = from_unix(talloc_tos(), result->d_name);
 120         if (!newname) {
 121                 return NULL;
 122         }
 123         newnamelen = strlen(newname)+1;
 124         newdirent = (SMB_STRUCT_DIRENT *)TALLOC_ARRAY(talloc_tos(),
 125                                                 char,
 126                                                 sizeof(SMB_STRUCT_DIRENT)+
 127                                                         newnamelen);
 128         if (!newdirent) {
 129                 return NULL;
 130         }
 131         memcpy(newdirent, result, sizeof(SMB_STRUCT_DIRENT));
 132         memcpy(&newdirent->d_name, newname, newnamelen);
 133         return newdirent;
 134 }
 135
 136 static int catia_open(vfs_handle_struct *handle,
 137                       struct smb_filename *smb_fname,
 138                       files_struct *fsp,
 139                       int flags,
 140                       mode_t mode)
 141 {
 142         char *name;
 143         char *tmp_base_name;
 144         int ret;
 145
 146         name = to_unix(talloc_tos(), smb_fname->base_name);
 147         if (!name) {
 148                 errno = ENOMEM;
 149                 return -1;
 150         }
 151
 152         tmp_base_name = smb_fname->base_name;
 153         smb_fname->base_name = name;
 154
 155         ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 156
 157         smb_fname->base_name = tmp_base_name;
 158         TALLOC_FREE(name);
 159
 160         return ret;
 161 }
 162
 163 static int catia_rename(vfs_handle_struct *handle,
 164                         const struct smb_filename *smb_fname_src,
 165                         const struct smb_filename *smb_fname_dst)
 166 {
 167         TALLOC_CTX *ctx = talloc_tos();
 168         char *oname = NULL;
 169         char *nname = NULL;
 170         struct smb_filename *smb_fname_src_tmp = NULL;
 171         struct smb_filename *smb_fname_dst_tmp = NULL;
 172         NTSTATUS status;
 173         int ret = -1;
 174
 175         oname = to_unix(ctx, smb_fname_src->base_name);
 176         nname = to_unix(ctx, smb_fname_dst->base_name);
 177         if (!oname || !nname) {
 178                 errno = ENOMEM;
 179                 goto out;
 180         }
 181
 182         /* Setup temporary smb_filename structs. */
 183         status = copy_smb_filename(talloc_tos(), smb_fname_src,
 184                                    &smb_fname_src_tmp);
 185         if (!NT_STATUS_IS_OK(status)) {
 186                 errno = map_errno_from_nt_status(status);
 187                 goto out;
 188         }
 189         status = copy_smb_filename(talloc_tos(), smb_fname_dst,
 190                                    &smb_fname_dst_tmp);
 191         if (!NT_STATUS_IS_OK(status)) {
 192                 errno = map_errno_from_nt_status(status);
 193                 goto out;
 194         }
 195
 196         smb_fname_src_tmp->base_name = oname;
 197         smb_fname_dst_tmp->base_name = nname;
 198
 199         DEBUG(10, ("converted old name: %s\n",
 200                    smb_fname_str_dbg(smb_fname_src_tmp)));
 201         DEBUG(10, ("converted new name: %s\n",
 202                    smb_fname_str_dbg(smb_fname_dst_tmp)));
 203
 204         ret = SMB_VFS_NEXT_RENAME(handle, smb_fname_src_tmp,
 205                                   smb_fname_dst_tmp);
 206  out:
 207         TALLOC_FREE(oname);
 208         TALLOC_FREE(nname);
 209         TALLOC_FREE(smb_fname_src_tmp);
 210         TALLOC_FREE(smb_fname_dst_tmp);
 211         return ret;
 212 }
 213
 214 static int catia_stat(vfs_handle_struct *handle,
 215                       struct smb_filename *smb_fname)
 216 {
 217         char *name;
 218         char *tmp_base_name;
 219         int ret;
 220
 221         name = to_unix(talloc_tos(), smb_fname->base_name);
 222         if (!name) {
 223                 errno = ENOMEM;
 224                 return -1;
 225         }
 226
 227         tmp_base_name = smb_fname->base_name;
 228         smb_fname->base_name = name;
 229
 230         ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
 231
 232         smb_fname->base_name = tmp_base_name;
 233         TALLOC_FREE(name);
 234
 235         return ret;
 236 }
 237
 238 static int catia_lstat(vfs_handle_struct *handle,
 239                        struct smb_filename *smb_fname)
 240 {
 241         char *name;
 242         char *tmp_base_name;
 243         int ret;
 244
 245         name = to_unix(talloc_tos(), smb_fname->base_name);
 246         if (!name) {
 247                 errno = ENOMEM;
 248                 return -1;
 249         }
 250
 251         tmp_base_name = smb_fname->base_name;
 252         smb_fname->base_name = name;
 253
 254         ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 255
 256         smb_fname->base_name = tmp_base_name;
 257         TALLOC_FREE(name);
 258
 259         return ret;
 260 }
 261
 262 static int catia_unlink(vfs_handle_struct *handle,
 263                         const struct smb_filename *smb_fname)
 264 {
 265         struct smb_filename *smb_fname_tmp = NULL;
 266         char *name = NULL;
 267         NTSTATUS status;
 268         int ret;
 269
 270         name = to_unix(talloc_tos(), smb_fname->base_name);
 271         if (!name) {
 272                 errno = ENOMEM;
 273                 return -1;
 274         }
 275
 276         /* Setup temporary smb_filename structs. */
 277         status = copy_smb_filename(talloc_tos(), smb_fname,
 278                                    &smb_fname_tmp);
 279         if (!NT_STATUS_IS_OK(status)) {
 280                 errno = map_errno_from_nt_status(status);
 281                 return -1;
 282         }
 283
 284         smb_fname_tmp->base_name = name;
 285
 286         ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
 287
 288         TALLOC_FREE(smb_fname_tmp);
 289         return ret;
 290 }
 291
 292 static int catia_chmod(vfs_handle_struct *handle,
 293                        const char *path, mode_t mode)
 294 {
 295         char *name = to_unix(talloc_tos(), path);
 296
 297         if (!name) {
 298                 errno = ENOMEM;
 299                 return -1;
 300         }
 301         return SMB_VFS_NEXT_CHMOD(handle, name, mode);
 302 }
 303
 304 static int catia_chown(vfs_handle_struct *handle,
 305                        const char *path, uid_t uid, gid_t gid)
 306 {
 307         char *name = to_unix(talloc_tos(), path);
 308
 309         if (!name) {
 310                 errno = ENOMEM;
 311                 return -1;
 312         }
 313         return SMB_VFS_NEXT_CHOWN(handle, name, uid, gid);
 314 }
 315
 316 static int catia_lchown(vfs_handle_struct *handle,
 317                        const char *path, uid_t uid, gid_t gid)
 318 {
 319         char *name = to_unix(talloc_tos(), path);
 320
 321         if (!name) {
 322                 errno = ENOMEM;
 323                 return -1;
 324         }
 325         return SMB_VFS_NEXT_LCHOWN(handle, name, uid, gid);
 326 }
 327
 328 static int catia_chdir(vfs_handle_struct *handle,
 329                        const char *path)
 330 {
 331         char *name = to_unix(talloc_tos(), path);
 332
 333         if (!name) {
 334                 errno = ENOMEM;
 335                 return -1;
 336         }
 337         return SMB_VFS_NEXT_CHDIR(handle, name);
 338 }
 339
 340 /* VFS operations structure */
 341
 342 static vfs_op_tuple catia_op_tuples[] = {
 343
 344         /* Directory operations */
 345
 346         {SMB_VFS_OP(catia_opendir), SMB_VFS_OP_OPENDIR,
 347 SMB_VFS_LAYER_TRANSPARENT},
 348         {SMB_VFS_OP(catia_readdir), SMB_VFS_OP_READDIR,
 349 SMB_VFS_LAYER_TRANSPARENT},
 350
 351         /* File operations */
 352
 353         {SMB_VFS_OP(catia_open), SMB_VFS_OP_OPEN,
 354 SMB_VFS_LAYER_TRANSPARENT},
 355         {SMB_VFS_OP(catia_rename),                      SMB_VFS_OP_RENAME,
 356         SMB_VFS_LAYER_TRANSPARENT},
 357         {SMB_VFS_OP(catia_stat), SMB_VFS_OP_STAT,
 358 SMB_VFS_LAYER_TRANSPARENT},
 359         {SMB_VFS_OP(catia_lstat),                       SMB_VFS_OP_LSTAT,
 360 SMB_VFS_LAYER_TRANSPARENT},
 361         {SMB_VFS_OP(catia_unlink),                      SMB_VFS_OP_UNLINK,
 362         SMB_VFS_LAYER_TRANSPARENT},
 363         {SMB_VFS_OP(catia_chmod),                       SMB_VFS_OP_CHMOD,
 364 SMB_VFS_LAYER_TRANSPARENT},
 365         {SMB_VFS_OP(catia_chown),                       SMB_VFS_OP_CHOWN,
 366 SMB_VFS_LAYER_TRANSPARENT},
 367         {SMB_VFS_OP(catia_lchown),                      SMB_VFS_OP_LCHOWN,
 368 SMB_VFS_LAYER_TRANSPARENT},
 369         {SMB_VFS_OP(catia_chdir),                       SMB_VFS_OP_CHDIR,
 370 SMB_VFS_LAYER_TRANSPARENT},
 371
 372         {NULL,                                          SMB_VFS_OP_NOOP,
 373 SMB_VFS_LAYER_NOOP}
 374 };
 375
 376 NTSTATUS vfs_catia_init(void);
 377 NTSTATUS vfs_catia_init(void)
 378 {
 379         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "catia",
 380 catia_op_tuples);
 381 }