| 1 | /* $Cambridge: exim/src/src/lookups/oracle.c,v 1.6 2009/11/16 19:50:38 nm4 Exp $ */ |
| 2 | |
| 3 | /************************************************* |
| 4 | * Exim - an Internet mail transport agent * |
| 5 | *************************************************/ |
| 6 | |
| 7 | /* Copyright (c) University of Cambridge 1995 - 2009 */ |
| 8 | /* See the file NOTICE for conditions of use and distribution. */ |
| 9 | |
| 10 | /* Interface to an Oracle database. This code was originally supplied by |
| 11 | Paul Kelly, but I have hacked it around for various reasons, and tried to add |
| 12 | some comments from my position of Oracle ignorance. */ |
| 13 | |
| 14 | |
| 15 | #include "../exim.h" |
| 16 | |
| 17 | |
| 18 | /* We can't just compile this code and allow the library mechanism to omit the |
| 19 | functions if they are not wanted, because we need to have the ORACLE headers |
| 20 | available for compiling. Therefore, compile these functions only if |
| 21 | LOOKUP_ORACLE is defined. However, some compilers don't like compiling empty |
| 22 | modules, so keep them happy with a dummy when skipping the rest. Make it |
| 23 | reference itself to stop picky compilers complaining that it is unused, and put |
| 24 | in a dummy argument to stop even pickier compilers complaining about infinite |
| 25 | loops. */ |
| 26 | |
| 27 | #ifndef LOOKUP_ORACLE |
| 28 | static void dummy(int x) { dummy(x-1); } |
| 29 | #else |
| 30 | |
| 31 | /* The Oracle system headers */ |
| 32 | |
| 33 | #include <oratypes.h> |
| 34 | #include <ocidfn.h> |
| 35 | #include <ocikpr.h> |
| 36 | |
| 37 | #include "oracle.h" /* The local header */ |
| 38 | |
| 39 | #define PARSE_NO_DEFER 0 /* parse straight away */ |
| 40 | #define PARSE_V7_LNG 2 |
| 41 | #define MAX_ITEM_BUFFER_SIZE 1024 /* largest size of a cell of data */ |
| 42 | #define MAX_SELECT_LIST_SIZE 32 /* maximum number of columns (not rows!) */ |
| 43 | |
| 44 | /* Paul's comment on this was "change this to 512 for 64bit cpu", but I don't |
| 45 | understand why. The Oracle manual just asks for 256 bytes. |
| 46 | |
| 47 | That was years ago. Jin Choi suggested (March 2007) that this change should |
| 48 | be made in the source, as at worst it wastes 256 bytes, and it saves people |
| 49 | having to discover about this for themselves as more and more systems are |
| 50 | 64-bit. So I have changed 256 to 512. */ |
| 51 | |
| 52 | #define HDA_SIZE 512 |
| 53 | |
| 54 | /* Internal/external datatype codes */ |
| 55 | |
| 56 | #define NUMBER_TYPE 2 |
| 57 | #define INT_TYPE 3 |
| 58 | #define FLOAT_TYPE 4 |
| 59 | #define STRING_TYPE 5 |
| 60 | #define ROWID_TYPE 11 |
| 61 | #define DATE_TYPE 12 |
| 62 | |
| 63 | /* ORACLE error codes used in demonstration programs */ |
| 64 | |
| 65 | #define VAR_NOT_IN_LIST 1007 |
| 66 | #define NO_DATA_FOUND 1403 |
| 67 | |
| 68 | typedef struct Ora_Describe { |
| 69 | sb4 dbsize; |
| 70 | sb2 dbtype; |
| 71 | sb1 buf[MAX_ITEM_BUFFER_SIZE]; |
| 72 | sb4 buflen; |
| 73 | sb4 dsize; |
| 74 | sb2 precision; |
| 75 | sb2 scale; |
| 76 | sb2 nullok; |
| 77 | } Ora_Describe; |
| 78 | |
| 79 | typedef struct Ora_Define { |
| 80 | ub1 buf[MAX_ITEM_BUFFER_SIZE]; |
| 81 | float flt_buf; |
| 82 | sword int_buf; |
| 83 | sb2 indp; |
| 84 | ub2 col_retlen, col_retcode; |
| 85 | } Ora_Define; |
| 86 | |
| 87 | /* Structure and anchor for caching connections. */ |
| 88 | |
| 89 | typedef struct oracle_connection { |
| 90 | struct oracle_connection *next; |
| 91 | uschar *server; |
| 92 | struct cda_def *handle; |
| 93 | void *hda_mem; |
| 94 | } oracle_connection; |
| 95 | |
| 96 | static oracle_connection *oracle_connections = NULL; |
| 97 | |
| 98 | |
| 99 | |
| 100 | |
| 101 | |
| 102 | /************************************************* |
| 103 | * Set up message after error * |
| 104 | *************************************************/ |
| 105 | |
| 106 | /* Sets up a message from a local string plus whatever Oracle gives. |
| 107 | |
| 108 | Arguments: |
| 109 | oracle_handle the handle of the connection |
| 110 | rc the return code |
| 111 | msg local text message |
| 112 | */ |
| 113 | |
| 114 | static uschar * |
| 115 | oracle_error(struct cda_def *oracle_handle, int rc, uschar *msg) |
| 116 | { |
| 117 | uschar tmp[1024]; |
| 118 | oerhms(oracle_handle, rc, tmp, sizeof(tmp)); |
| 119 | return string_sprintf("ORACLE %s: %s", msg, tmp); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | |
| 124 | /************************************************* |
| 125 | * Describe and define the select list items * |
| 126 | *************************************************/ |
| 127 | |
| 128 | /* Figures out sizes, types, and numbers. |
| 129 | |
| 130 | Arguments: |
| 131 | cda the connection |
| 132 | def |
| 133 | desc descriptions put here |
| 134 | |
| 135 | Returns: number of fields |
| 136 | */ |
| 137 | |
| 138 | static sword |
| 139 | describe_define(Cda_Def *cda, Ora_Define *def, Ora_Describe *desc) |
| 140 | { |
| 141 | sword col, deflen, deftyp; |
| 142 | static ub1 *defptr; |
| 143 | static sword numwidth = 8; |
| 144 | |
| 145 | /* Describe the select-list items. */ |
| 146 | |
| 147 | for (col = 0; col < MAX_SELECT_LIST_SIZE; col++) |
| 148 | { |
| 149 | desc[col].buflen = MAX_ITEM_BUFFER_SIZE; |
| 150 | |
| 151 | if (odescr(cda, col + 1, &desc[col].dbsize, |
| 152 | &desc[col].dbtype, &desc[col].buf[0], |
| 153 | &desc[col].buflen, &desc[col].dsize, |
| 154 | &desc[col].precision, &desc[col].scale, |
| 155 | &desc[col].nullok) != 0) |
| 156 | { |
| 157 | /* Break on end of select list. */ |
| 158 | if (cda->rc == VAR_NOT_IN_LIST) break; else return -1; |
| 159 | } |
| 160 | |
| 161 | /* Adjust sizes and types for display, handling NUMBER with scale as float. */ |
| 162 | |
| 163 | if (desc[col].dbtype == NUMBER_TYPE) |
| 164 | { |
| 165 | desc[col].dbsize = numwidth; |
| 166 | if (desc[col].scale != 0) |
| 167 | { |
| 168 | defptr = (ub1 *)&def[col].flt_buf; |
| 169 | deflen = (sword) sizeof(float); |
| 170 | deftyp = FLOAT_TYPE; |
| 171 | desc[col].dbtype = FLOAT_TYPE; |
| 172 | } |
| 173 | else |
| 174 | { |
| 175 | defptr = (ub1 *)&def[col].int_buf; |
| 176 | deflen = (sword) sizeof(sword); |
| 177 | deftyp = INT_TYPE; |
| 178 | desc[col].dbtype = INT_TYPE; |
| 179 | } |
| 180 | } |
| 181 | else |
| 182 | { |
| 183 | if (desc[col].dbtype == DATE_TYPE) |
| 184 | desc[col].dbsize = 9; |
| 185 | if (desc[col].dbtype == ROWID_TYPE) |
| 186 | desc[col].dbsize = 18; |
| 187 | defptr = def[col].buf; |
| 188 | deflen = desc[col].dbsize > MAX_ITEM_BUFFER_SIZE ? |
| 189 | MAX_ITEM_BUFFER_SIZE : desc[col].dbsize + 1; |
| 190 | deftyp = STRING_TYPE; |
| 191 | desc[col].dbtype = STRING_TYPE; |
| 192 | } |
| 193 | |
| 194 | /* Define an output variable */ |
| 195 | |
| 196 | if (odefin(cda, col + 1, |
| 197 | defptr, deflen, deftyp, |
| 198 | -1, &def[col].indp, (text *) 0, -1, -1, |
| 199 | &def[col].col_retlen, |
| 200 | &def[col].col_retcode) != 0) |
| 201 | return -1; |
| 202 | } /* Loop for each column */ |
| 203 | |
| 204 | return col; |
| 205 | } |
| 206 | |
| 207 | |
| 208 | |
| 209 | /************************************************* |
| 210 | * Open entry point * |
| 211 | *************************************************/ |
| 212 | |
| 213 | /* See local README for interface description. */ |
| 214 | |
| 215 | void * |
| 216 | oracle_open(uschar *filename, uschar **errmsg) |
| 217 | { |
| 218 | return (void *)(1); /* Just return something non-null */ |
| 219 | } |
| 220 | |
| 221 | |
| 222 | |
| 223 | /************************************************* |
| 224 | * Tidy entry point * |
| 225 | *************************************************/ |
| 226 | |
| 227 | /* See local README for interface description. */ |
| 228 | |
| 229 | void |
| 230 | oracle_tidy(void) |
| 231 | { |
| 232 | oracle_connection *cn; |
| 233 | while ((cn = oracle_connections) != NULL) |
| 234 | { |
| 235 | oracle_connections = cn->next; |
| 236 | DEBUG(D_lookup) debug_printf("close ORACLE connection: %s\n", cn->server); |
| 237 | ologof(cn->handle); |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | |
| 242 | |
| 243 | /************************************************* |
| 244 | * Internal search function * |
| 245 | *************************************************/ |
| 246 | |
| 247 | /* This function is called from the find entry point to do the search for a |
| 248 | single server. |
| 249 | |
| 250 | Arguments: |
| 251 | query the query string |
| 252 | server the server string |
| 253 | resultptr where to store the result |
| 254 | errmsg where to point an error message |
| 255 | defer_break TRUE if no more servers are to be tried after DEFER |
| 256 | |
| 257 | The server string is of the form "host/dbname/user/password", for compatibility |
| 258 | with MySQL and pgsql, but at present, the dbname is not used. This string is in |
| 259 | a nextinlist temporary buffer, so can be overwritten. |
| 260 | |
| 261 | Returns: OK, FAIL, or DEFER |
| 262 | */ |
| 263 | |
| 264 | static int |
| 265 | perform_oracle_search(uschar *query, uschar *server, uschar **resultptr, |
| 266 | uschar **errmsg, BOOL *defer_break) |
| 267 | { |
| 268 | Cda_Def *cda = NULL; |
| 269 | struct cda_def *oracle_handle = NULL; |
| 270 | Ora_Describe *desc = NULL; |
| 271 | Ora_Define *def = NULL; |
| 272 | void *hda = NULL; |
| 273 | |
| 274 | int i; |
| 275 | int ssize = 0; |
| 276 | int offset = 0; |
| 277 | int yield = DEFER; |
| 278 | unsigned int num_fields = 0; |
| 279 | uschar *result = NULL; |
| 280 | oracle_connection *cn = NULL; |
| 281 | uschar *server_copy = NULL; |
| 282 | uschar *sdata[4]; |
| 283 | uschar tmp[1024]; |
| 284 | |
| 285 | /* Disaggregate the parameters from the server argument. The order is host, |
| 286 | database, user, password. We can write to the string, since it is in a |
| 287 | nextinlist temporary buffer. The copy of the string that is used for caching |
| 288 | has the password removed. This copy is also used for debugging output. */ |
| 289 | |
| 290 | for (i = 3; i > 0; i--) |
| 291 | { |
| 292 | uschar *pp = Ustrrchr(server, '/'); |
| 293 | if (pp == NULL) |
| 294 | { |
| 295 | *errmsg = string_sprintf("incomplete ORACLE server data: %s", server); |
| 296 | *defer_break = TRUE; |
| 297 | return DEFER; |
| 298 | } |
| 299 | *pp++ = 0; |
| 300 | sdata[i] = pp; |
| 301 | if (i == 3) server_copy = string_copy(server); /* sans password */ |
| 302 | } |
| 303 | sdata[0] = server; /* What's left at the start */ |
| 304 | |
| 305 | /* If the database is the empty string, set it NULL - the query must then |
| 306 | define it. */ |
| 307 | |
| 308 | if (sdata[1][0] == 0) sdata[1] = NULL; |
| 309 | |
| 310 | /* See if we have a cached connection to the server */ |
| 311 | |
| 312 | for (cn = oracle_connections; cn != NULL; cn = cn->next) |
| 313 | { |
| 314 | if (strcmp(cn->server, server_copy) == 0) |
| 315 | { |
| 316 | oracle_handle = cn->handle; |
| 317 | hda = cn->hda_mem; |
| 318 | break; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | /* If no cached connection, we must set one up */ |
| 323 | |
| 324 | if (cn == NULL) |
| 325 | { |
| 326 | DEBUG(D_lookup) debug_printf("ORACLE new connection: host=%s database=%s " |
| 327 | "user=%s\n", sdata[0], sdata[1], sdata[2]); |
| 328 | |
| 329 | /* Get store for a new connection, initialize it, and connect to the server */ |
| 330 | |
| 331 | oracle_handle = store_get(sizeof(struct cda_def)); |
| 332 | hda = store_get(HDA_SIZE); |
| 333 | memset(hda,'\0',HDA_SIZE); |
| 334 | |
| 335 | /* |
| 336 | * Perform a default (blocking) login |
| 337 | * |
| 338 | * sdata[0] = tnsname (service name - typically host name) |
| 339 | * sdata[1] = dbname - not used at present |
| 340 | * sdata[2] = username |
| 341 | * sdata[3] = passwd |
| 342 | */ |
| 343 | |
| 344 | if(olog(oracle_handle, hda, sdata[2], -1, sdata[3], -1, sdata[0], -1, |
| 345 | (ub4)OCI_LM_DEF) != 0) |
| 346 | { |
| 347 | *errmsg = oracle_error(oracle_handle, oracle_handle->rc, |
| 348 | US"connection failed"); |
| 349 | *defer_break = FALSE; |
| 350 | goto ORACLE_EXIT_NO_VALS; |
| 351 | } |
| 352 | |
| 353 | /* Add the connection to the cache */ |
| 354 | |
| 355 | cn = store_get(sizeof(oracle_connection)); |
| 356 | cn->server = server_copy; |
| 357 | cn->handle = oracle_handle; |
| 358 | cn->next = oracle_connections; |
| 359 | cn->hda_mem = hda; |
| 360 | oracle_connections = cn; |
| 361 | } |
| 362 | |
| 363 | /* Else use a previously cached connection - we can write to the server string |
| 364 | to obliterate the password because it is in a nextinlist temporary buffer. */ |
| 365 | |
| 366 | else |
| 367 | { |
| 368 | DEBUG(D_lookup) |
| 369 | debug_printf("ORACLE using cached connection for %s\n", server_copy); |
| 370 | } |
| 371 | |
| 372 | /* We have a connection. Open a cursor and run the query */ |
| 373 | |
| 374 | cda = store_get(sizeof(Cda_Def)); |
| 375 | |
| 376 | if (oopen(cda, oracle_handle, (text *)0, -1, -1, (text *)0, -1) != 0) |
| 377 | { |
| 378 | *errmsg = oracle_error(oracle_handle, cda->rc, "failed to open cursor"); |
| 379 | *defer_break = FALSE; |
| 380 | goto ORACLE_EXIT_NO_VALS; |
| 381 | } |
| 382 | |
| 383 | if (oparse(cda, (text *)query, (sb4) -1, |
| 384 | (sword)PARSE_NO_DEFER, (ub4)PARSE_V7_LNG) != 0) |
| 385 | { |
| 386 | *errmsg = oracle_error(oracle_handle, cda->rc, "query failed"); |
| 387 | *defer_break = FALSE; |
| 388 | oclose(cda); |
| 389 | goto ORACLE_EXIT_NO_VALS; |
| 390 | } |
| 391 | |
| 392 | /* Find the number of fields returned and sort out their types. If the number |
| 393 | is one, we don't add field names to the data. Otherwise we do. */ |
| 394 | |
| 395 | def = store_get(sizeof(Ora_Define)*MAX_SELECT_LIST_SIZE); |
| 396 | desc = store_get(sizeof(Ora_Describe)*MAX_SELECT_LIST_SIZE); |
| 397 | |
| 398 | if ((num_fields = describe_define(cda,def,desc)) == -1) |
| 399 | { |
| 400 | *errmsg = oracle_error(oracle_handle, cda->rc, "describe_define failed"); |
| 401 | *defer_break = FALSE; |
| 402 | goto ORACLE_EXIT; |
| 403 | } |
| 404 | |
| 405 | if (oexec(cda)!=0) |
| 406 | { |
| 407 | *errmsg = oracle_error(oracle_handle, cda->rc, "oexec failed"); |
| 408 | *defer_break = FALSE; |
| 409 | goto ORACLE_EXIT; |
| 410 | } |
| 411 | |
| 412 | /* Get the fields and construct the result string. If there is more than one |
| 413 | row, we insert '\n' between them. */ |
| 414 | |
| 415 | while (cda->rc != NO_DATA_FOUND) /* Loop for each row */ |
| 416 | { |
| 417 | ofetch(cda); |
| 418 | if(cda->rc == NO_DATA_FOUND) break; |
| 419 | |
| 420 | if (result != NULL) result = string_cat(result, &ssize, &offset, "\n", 1); |
| 421 | |
| 422 | /* Single field - just add on the data */ |
| 423 | |
| 424 | if (num_fields == 1) |
| 425 | result = string_cat(result, &ssize, &offset, def[0].buf, def[0].col_retlen); |
| 426 | |
| 427 | /* Multiple fields - precede by file name, removing {lead,trail}ing WS */ |
| 428 | |
| 429 | else for (i = 0; i < num_fields; i++) |
| 430 | { |
| 431 | int slen; |
| 432 | uschar *s = US desc[i].buf; |
| 433 | |
| 434 | while (*s != 0 && isspace(*s)) s++; |
| 435 | slen = Ustrlen(s); |
| 436 | while (slen > 0 && isspace(s[slen-1])) slen--; |
| 437 | result = string_cat(result, &ssize, &offset, s, slen); |
| 438 | result = string_cat(result, &ssize, &offset, US"=", 1); |
| 439 | |
| 440 | /* int and float type wont ever need escaping. Otherwise, quote the value |
| 441 | if it contains spaces or is empty. */ |
| 442 | |
| 443 | if (desc[i].dbtype != INT_TYPE && desc[i].dbtype != FLOAT_TYPE && |
| 444 | (def[i].buf[0] == 0 || strchr(def[i].buf, ' ') != NULL)) |
| 445 | { |
| 446 | int j; |
| 447 | result = string_cat(result, &ssize, &offset, "\"", 1); |
| 448 | for (j = 0; j < def[i].col_retlen; j++) |
| 449 | { |
| 450 | if (def[i].buf[j] == '\"' || def[i].buf[j] == '\\') |
| 451 | result = string_cat(result, &ssize, &offset, "\\", 1); |
| 452 | result = string_cat(result, &ssize, &offset, def[i].buf+j, 1); |
| 453 | } |
| 454 | result = string_cat(result, &ssize, &offset, "\"", 1); |
| 455 | } |
| 456 | |
| 457 | else switch(desc[i].dbtype) |
| 458 | { |
| 459 | case INT_TYPE: |
| 460 | sprintf(CS tmp, "%d", def[i].int_buf); |
| 461 | result = string_cat(result, &ssize, &offset, tmp, Ustrlen(tmp)); |
| 462 | break; |
| 463 | |
| 464 | case FLOAT_TYPE: |
| 465 | sprintf(CS tmp, "%f", def[i].flt_buf); |
| 466 | result = string_cat(result, &ssize, &offset, tmp, Ustrlen(tmp)); |
| 467 | break; |
| 468 | |
| 469 | case STRING_TYPE: |
| 470 | result = string_cat(result, &ssize, &offset, def[i].buf, |
| 471 | def[i].col_retlen); |
| 472 | break; |
| 473 | |
| 474 | default: |
| 475 | *errmsg = string_sprintf("ORACLE: unknown field type %d", desc[i].dbtype); |
| 476 | *defer_break = FALSE; |
| 477 | result = NULL; |
| 478 | goto ORACLE_EXIT; |
| 479 | } |
| 480 | |
| 481 | result = string_cat(result, &ssize, &offset, " ", 1); |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | /* If result is NULL then no data has been found and so we return FAIL. |
| 486 | Otherwise, we must terminate the string which has been built; string_cat() |
| 487 | always leaves enough room for a terminating zero. */ |
| 488 | |
| 489 | if (result == NULL) |
| 490 | { |
| 491 | yield = FAIL; |
| 492 | *errmsg = "ORACLE: no data found"; |
| 493 | } |
| 494 | else |
| 495 | { |
| 496 | result[offset] = 0; |
| 497 | store_reset(result + offset + 1); |
| 498 | } |
| 499 | |
| 500 | /* Get here by goto from various error checks. */ |
| 501 | |
| 502 | ORACLE_EXIT: |
| 503 | |
| 504 | /* Close the cursor; don't close the connection, as it is cached. */ |
| 505 | |
| 506 | oclose(cda); |
| 507 | |
| 508 | ORACLE_EXIT_NO_VALS: |
| 509 | |
| 510 | /* Non-NULL result indicates a sucessful result */ |
| 511 | |
| 512 | if (result != NULL) |
| 513 | { |
| 514 | *resultptr = result; |
| 515 | return OK; |
| 516 | } |
| 517 | else |
| 518 | { |
| 519 | DEBUG(D_lookup) debug_printf("%s\n", *errmsg); |
| 520 | return yield; /* FAIL or DEFER */ |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | |
| 525 | |
| 526 | |
| 527 | /************************************************* |
| 528 | * Find entry point * |
| 529 | *************************************************/ |
| 530 | |
| 531 | /* See local README for interface description. The handle and filename |
| 532 | arguments are not used. Loop through a list of servers while the query is |
| 533 | deferred with a retryable error. */ |
| 534 | |
| 535 | int |
| 536 | oracle_find(void *handle, uschar *filename, uschar *query, int length, |
| 537 | uschar **result, uschar **errmsg, BOOL *do_cache) |
| 538 | { |
| 539 | int sep = 0; |
| 540 | uschar *server; |
| 541 | uschar *list = oracle_servers; |
| 542 | uschar buffer[512]; |
| 543 | |
| 544 | do_cache = do_cache; /* Placate picky compilers */ |
| 545 | |
| 546 | DEBUG(D_lookup) debug_printf("ORACLE query: %s\n", query); |
| 547 | |
| 548 | while ((server = string_nextinlist(&list, &sep, buffer, sizeof(buffer))) != NULL) |
| 549 | { |
| 550 | BOOL defer_break; |
| 551 | int rc = perform_oracle_search(query, server, result, errmsg, &defer_break); |
| 552 | if (rc != DEFER || defer_break) return rc; |
| 553 | } |
| 554 | |
| 555 | if (oracle_servers == NULL) |
| 556 | *errmsg = "no ORACLE servers defined (oracle_servers option)"; |
| 557 | |
| 558 | return DEFER; |
| 559 | } |
| 560 | |
| 561 | |
| 562 | |
| 563 | /************************************************* |
| 564 | * Quote entry point * |
| 565 | *************************************************/ |
| 566 | |
| 567 | /* The only characters that need to be quoted (with backslash) are newline, |
| 568 | tab, carriage return, backspace, backslash itself, and the quote characters. |
| 569 | Percent and underscore are not escaped. They are only special in contexts where |
| 570 | they can be wild cards, and this isn't usually the case for data inserted from |
| 571 | messages, since that isn't likely to be treated as a pattern of any kind. |
| 572 | |
| 573 | Arguments: |
| 574 | s the string to be quoted |
| 575 | opt additional option text or NULL if none |
| 576 | |
| 577 | Returns: the processed string or NULL for a bad option |
| 578 | */ |
| 579 | |
| 580 | uschar * |
| 581 | oracle_quote(uschar *s, uschar *opt) |
| 582 | { |
| 583 | register int c; |
| 584 | int count = 0; |
| 585 | uschar *t = s; |
| 586 | uschar *quoted; |
| 587 | |
| 588 | if (opt != NULL) return NULL; /* No options are recognized */ |
| 589 | |
| 590 | while ((c = *t++) != 0) |
| 591 | if (strchr("\n\t\r\b\'\"\\", c) != NULL) count++; |
| 592 | |
| 593 | if (count == 0) return s; |
| 594 | t = quoted = store_get((int)strlen(s) + count + 1); |
| 595 | |
| 596 | while ((c = *s++) != 0) |
| 597 | { |
| 598 | if (strchr("\n\t\r\b\'\"\\", c) != NULL) |
| 599 | { |
| 600 | *t++ = '\\'; |
| 601 | switch(c) |
| 602 | { |
| 603 | case '\n': *t++ = 'n'; |
| 604 | break; |
| 605 | case '\t': *t++ = 't'; |
| 606 | break; |
| 607 | case '\r': *t++ = 'r'; |
| 608 | break; |
| 609 | case '\b': *t++ = 'b'; |
| 610 | break; |
| 611 | default: *t++ = c; |
| 612 | break; |
| 613 | } |
| 614 | } |
| 615 | else *t++ = c; |
| 616 | } |
| 617 | |
| 618 | *t = 0; |
| 619 | return quoted; |
| 620 | } |
| 621 | |
| 622 | #endif /* LOOKUP_ORACLE */ |
| 623 | |
| 624 | /* End of lookups/oracle.c */ |