| 1 | /************************************************* |
| 2 | * Exim - an Internet mail transport agent * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
| 6 | /* See the file NOTICE for conditions of use and distribution. */ |
| 7 | |
| 8 | |
| 9 | #include "exim.h" |
| 10 | |
| 11 | |
| 12 | /* Functions for accessing Exim's hints database, which consists of a number of |
| 13 | different DBM files. This module does not contain code for reading DBM files |
| 14 | for (e.g.) alias expansion. That is all contained within the general search |
| 15 | functions. As Exim now has support for several DBM interfaces, all the relevant |
| 16 | functions are called as macros. |
| 17 | |
| 18 | All the data in Exim's database is in the nature of *hints*. Therefore it |
| 19 | doesn't matter if it gets destroyed by accident. These functions are not |
| 20 | supposed to implement a "safe" database. |
| 21 | |
| 22 | Keys are passed in as C strings, and the terminating zero *is* used when |
| 23 | building the dbm files. This just makes life easier when scanning the files |
| 24 | sequentially. |
| 25 | |
| 26 | Synchronization is required on the database files, and this is achieved by |
| 27 | means of locking on independent lock files. (Earlier attempts to lock on the |
| 28 | DBM files themselves were never completely successful.) Since callers may in |
| 29 | general want to do more than one read or write while holding the lock, there |
| 30 | are separate open and close functions. However, the calling modules should |
| 31 | arrange to hold the locks for the bare minimum of time. */ |
| 32 | |
| 33 | |
| 34 | |
| 35 | /************************************************* |
| 36 | * Berkeley DB error callback * |
| 37 | *************************************************/ |
| 38 | |
| 39 | /* For Berkeley DB >= 2, we can define a function to be called in case of DB |
| 40 | errors. This should help with debugging strange DB problems, e.g. getting "File |
| 41 | exists" when you try to open a db file. The API for this function was changed |
| 42 | at DB release 4.3. */ |
| 43 | |
| 44 | #if defined(USE_DB) && defined(DB_VERSION_STRING) |
| 45 | void |
| 46 | #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3) |
| 47 | dbfn_bdb_error_callback(const DB_ENV *dbenv, const char *pfx, const char *msg) |
| 48 | { |
| 49 | dbenv = dbenv; |
| 50 | #else |
| 51 | dbfn_bdb_error_callback(const char *pfx, char *msg) |
| 52 | { |
| 53 | #endif |
| 54 | pfx = pfx; |
| 55 | log_write(0, LOG_MAIN, "Berkeley DB error: %s", msg); |
| 56 | } |
| 57 | #endif |
| 58 | |
| 59 | |
| 60 | |
| 61 | |
| 62 | /************************************************* |
| 63 | * Open and lock a database file * |
| 64 | *************************************************/ |
| 65 | |
| 66 | /* Used for accessing Exim's hints databases. |
| 67 | |
| 68 | Arguments: |
| 69 | name The single-component name of one of Exim's database files. |
| 70 | flags Either O_RDONLY or O_RDWR, indicating the type of open required; |
| 71 | O_RDWR implies "create if necessary" |
| 72 | dbblock Points to an open_db block to be filled in. |
| 73 | lof If TRUE, write to the log for actual open failures (locking failures |
| 74 | are always logged). |
| 75 | |
| 76 | Returns: NULL if the open failed, or the locking failed. After locking |
| 77 | failures, errno is zero. |
| 78 | |
| 79 | On success, dbblock is returned. This contains the dbm pointer and |
| 80 | the fd of the locked lock file. |
| 81 | |
| 82 | There are some calls that use O_RDWR|O_CREAT for the flags. Having discovered |
| 83 | this in December 2005, I'm not sure if this is correct or not, but for the |
| 84 | moment I haven't changed them. |
| 85 | */ |
| 86 | |
| 87 | open_db * |
| 88 | dbfn_open(uschar *name, int flags, open_db *dbblock, BOOL lof) |
| 89 | { |
| 90 | int rc, save_errno; |
| 91 | BOOL read_only = flags == O_RDONLY; |
| 92 | BOOL created = FALSE; |
| 93 | flock_t lock_data; |
| 94 | uschar dirname[256], filename[256]; |
| 95 | |
| 96 | DEBUG(D_hints_lookup) acl_level++; |
| 97 | |
| 98 | /* The first thing to do is to open a separate file on which to lock. This |
| 99 | ensures that Exim has exclusive use of the database before it even tries to |
| 100 | open it. Early versions tried to lock on the open database itself, but that |
| 101 | gave rise to mysterious problems from time to time - it was suspected that some |
| 102 | DB libraries "do things" on their open() calls which break the interlocking. |
| 103 | The lock file is never written to, but we open it for writing so we can get a |
| 104 | write lock if required. If it does not exist, we create it. This is done |
| 105 | separately so we know when we have done it, because when running as root we |
| 106 | need to change the ownership - see the bottom of this function. We also try to |
| 107 | make the directory as well, just in case. We won't be doing this many times |
| 108 | unnecessarily, because usually the lock file will be there. If the directory |
| 109 | exists, there is no error. */ |
| 110 | |
| 111 | snprintf(CS dirname, sizeof(dirname), "%s/db", spool_directory); |
| 112 | snprintf(CS filename, sizeof(filename), "%s/%s.lockfile", dirname, name); |
| 113 | |
| 114 | if ((dbblock->lockfd = Uopen(filename, O_RDWR, EXIMDB_LOCKFILE_MODE)) < 0) |
| 115 | { |
| 116 | created = TRUE; |
| 117 | (void)directory_make(spool_directory, US"db", EXIMDB_DIRECTORY_MODE, TRUE); |
| 118 | dbblock->lockfd = Uopen(filename, O_RDWR|O_CREAT, EXIMDB_LOCKFILE_MODE); |
| 119 | } |
| 120 | |
| 121 | if (dbblock->lockfd < 0) |
| 122 | { |
| 123 | log_write(0, LOG_MAIN, "%s", |
| 124 | string_open_failed(errno, "database lock file %s", filename)); |
| 125 | errno = 0; /* Indicates locking failure */ |
| 126 | DEBUG(D_hints_lookup) acl_level--; |
| 127 | return NULL; |
| 128 | } |
| 129 | |
| 130 | /* Now we must get a lock on the opened lock file; do this with a blocking |
| 131 | lock that times out. */ |
| 132 | |
| 133 | lock_data.l_type = read_only? F_RDLCK : F_WRLCK; |
| 134 | lock_data.l_whence = lock_data.l_start = lock_data.l_len = 0; |
| 135 | |
| 136 | DEBUG(D_hints_lookup|D_retry|D_route|D_deliver) |
| 137 | debug_printf_indent("locking %s\n", filename); |
| 138 | |
| 139 | sigalrm_seen = FALSE; |
| 140 | ALARM(EXIMDB_LOCK_TIMEOUT); |
| 141 | rc = fcntl(dbblock->lockfd, F_SETLKW, &lock_data); |
| 142 | ALARM_CLR(0); |
| 143 | |
| 144 | if (sigalrm_seen) errno = ETIMEDOUT; |
| 145 | if (rc < 0) |
| 146 | { |
| 147 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to get %s lock for %s: %s", |
| 148 | read_only ? "read" : "write", filename, |
| 149 | errno == ETIMEDOUT ? "timed out" : strerror(errno)); |
| 150 | (void)close(dbblock->lockfd); |
| 151 | errno = 0; /* Indicates locking failure */ |
| 152 | DEBUG(D_hints_lookup) acl_level--; |
| 153 | return NULL; |
| 154 | } |
| 155 | |
| 156 | DEBUG(D_hints_lookup) debug_printf_indent("locked %s\n", filename); |
| 157 | |
| 158 | /* At this point we have an opened and locked separate lock file, that is, |
| 159 | exclusive access to the database, so we can go ahead and open it. If we are |
| 160 | expected to create it, don't do so at first, again so that we can detect |
| 161 | whether we need to change its ownership (see comments about the lock file |
| 162 | above.) There have been regular reports of crashes while opening hints |
| 163 | databases - often this is caused by non-matching db.h and the library. To make |
| 164 | it easy to pin this down, there are now debug statements on either side of the |
| 165 | open call. */ |
| 166 | |
| 167 | snprintf(CS filename, sizeof(filename), "%s/%s", dirname, name); |
| 168 | EXIM_DBOPEN(filename, dirname, flags, EXIMDB_MODE, &(dbblock->dbptr)); |
| 169 | |
| 170 | if (!dbblock->dbptr && errno == ENOENT && flags == O_RDWR) |
| 171 | { |
| 172 | DEBUG(D_hints_lookup) |
| 173 | debug_printf_indent("%s appears not to exist: trying to create\n", filename); |
| 174 | created = TRUE; |
| 175 | EXIM_DBOPEN(filename, dirname, flags|O_CREAT, EXIMDB_MODE, &(dbblock->dbptr)); |
| 176 | } |
| 177 | |
| 178 | save_errno = errno; |
| 179 | |
| 180 | /* If we are running as root and this is the first access to the database, its |
| 181 | files will be owned by root. We want them to be owned by exim. We detect this |
| 182 | situation by noting above when we had to create the lock file or the database |
| 183 | itself. Because the different dbm libraries use different extensions for their |
| 184 | files, I don't know of any easier way of arranging this than scanning the |
| 185 | directory for files with the appropriate base name. At least this deals with |
| 186 | the lock file at the same time. Also, the directory will typically have only |
| 187 | half a dozen files, so the scan will be quick. |
| 188 | |
| 189 | This code is placed here, before the test for successful opening, because there |
| 190 | was a case when a file was created, but the DBM library still returned NULL |
| 191 | because of some problem. It also sorts out the lock file if that was created |
| 192 | but creation of the database file failed. */ |
| 193 | |
| 194 | if (created && geteuid() == root_uid) |
| 195 | { |
| 196 | DIR *dd; |
| 197 | struct dirent *ent; |
| 198 | uschar *lastname = Ustrrchr(filename, '/') + 1; |
| 199 | int namelen = Ustrlen(name); |
| 200 | |
| 201 | *lastname = 0; |
| 202 | dd = opendir(CS filename); |
| 203 | |
| 204 | while ((ent = readdir(dd))) |
| 205 | if (Ustrncmp(ent->d_name, name, namelen) == 0) |
| 206 | { |
| 207 | struct stat statbuf; |
| 208 | Ustrcpy(lastname, ent->d_name); |
| 209 | if (Ustat(filename, &statbuf) >= 0 && statbuf.st_uid != exim_uid) |
| 210 | { |
| 211 | DEBUG(D_hints_lookup) debug_printf_indent("ensuring %s is owned by exim\n", filename); |
| 212 | if (exim_chown(filename, exim_uid, exim_gid)) |
| 213 | DEBUG(D_hints_lookup) debug_printf_indent("failed setting %s to owned by exim\n", filename); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | closedir(dd); |
| 218 | } |
| 219 | |
| 220 | /* If the open has failed, return NULL, leaving errno set. If lof is TRUE, |
| 221 | log the event - also for debugging - but debug only if the file just doesn't |
| 222 | exist. */ |
| 223 | |
| 224 | if (!dbblock->dbptr) |
| 225 | { |
| 226 | if (lof && save_errno != ENOENT) |
| 227 | log_write(0, LOG_MAIN, "%s", string_open_failed(save_errno, "DB file %s", |
| 228 | filename)); |
| 229 | else |
| 230 | DEBUG(D_hints_lookup) |
| 231 | debug_printf_indent("%s\n", CS string_open_failed(save_errno, "DB file %s", |
| 232 | filename)); |
| 233 | (void)close(dbblock->lockfd); |
| 234 | errno = save_errno; |
| 235 | DEBUG(D_hints_lookup) acl_level--; |
| 236 | return NULL; |
| 237 | } |
| 238 | |
| 239 | DEBUG(D_hints_lookup) |
| 240 | debug_printf_indent("opened hints database %s: flags=%s\n", filename, |
| 241 | flags == O_RDONLY ? "O_RDONLY" |
| 242 | : flags == O_RDWR ? "O_RDWR" |
| 243 | : flags == (O_RDWR|O_CREAT) ? "O_RDWR|O_CREAT" |
| 244 | : "??"); |
| 245 | |
| 246 | /* Pass back the block containing the opened database handle and the open fd |
| 247 | for the lock. */ |
| 248 | |
| 249 | return dbblock; |
| 250 | } |
| 251 | |
| 252 | |
| 253 | |
| 254 | |
| 255 | /************************************************* |
| 256 | * Unlock and close a database file * |
| 257 | *************************************************/ |
| 258 | |
| 259 | /* Closing a file automatically unlocks it, so after closing the database, just |
| 260 | close the lock file. |
| 261 | |
| 262 | Argument: a pointer to an open database block |
| 263 | Returns: nothing |
| 264 | */ |
| 265 | |
| 266 | void |
| 267 | dbfn_close(open_db *dbblock) |
| 268 | { |
| 269 | EXIM_DBCLOSE(dbblock->dbptr); |
| 270 | (void)close(dbblock->lockfd); |
| 271 | DEBUG(D_hints_lookup) |
| 272 | { debug_printf_indent("closed hints database and lockfile\n"); acl_level--; } |
| 273 | } |
| 274 | |
| 275 | |
| 276 | |
| 277 | |
| 278 | /************************************************* |
| 279 | * Read from database file * |
| 280 | *************************************************/ |
| 281 | |
| 282 | /* Passing back the pointer unchanged is useless, because there is |
| 283 | no guarantee of alignment. Since all the records used by Exim need |
| 284 | to be properly aligned to pick out the timestamps, etc., we might as |
| 285 | well do the copying centrally here. |
| 286 | |
| 287 | Most calls don't need the length, so there is a macro called dbfn_read which |
| 288 | has two arguments; it calls this function adding NULL as the third. |
| 289 | |
| 290 | Arguments: |
| 291 | dbblock a pointer to an open database block |
| 292 | key the key of the record to be read |
| 293 | length a pointer to an int into which to return the length, if not NULL |
| 294 | |
| 295 | Returns: a pointer to the retrieved record, or |
| 296 | NULL if the record is not found |
| 297 | */ |
| 298 | |
| 299 | void * |
| 300 | dbfn_read_with_length(open_db *dbblock, const uschar *key, int *length) |
| 301 | { |
| 302 | void *yield; |
| 303 | EXIM_DATUM key_datum, result_datum; |
| 304 | int klen = Ustrlen(key) + 1; |
| 305 | uschar * key_copy = store_get(klen); |
| 306 | |
| 307 | memcpy(key_copy, key, klen); |
| 308 | |
| 309 | DEBUG(D_hints_lookup) debug_printf_indent("dbfn_read: key=%s\n", key); |
| 310 | |
| 311 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */ |
| 312 | EXIM_DATUM_INIT(result_datum); /* to be cleared before use. */ |
| 313 | EXIM_DATUM_DATA(key_datum) = CS key_copy; |
| 314 | EXIM_DATUM_SIZE(key_datum) = klen; |
| 315 | |
| 316 | if (!EXIM_DBGET(dbblock->dbptr, key_datum, result_datum)) return NULL; |
| 317 | |
| 318 | yield = store_get(EXIM_DATUM_SIZE(result_datum)); |
| 319 | memcpy(yield, EXIM_DATUM_DATA(result_datum), EXIM_DATUM_SIZE(result_datum)); |
| 320 | if (length != NULL) *length = EXIM_DATUM_SIZE(result_datum); |
| 321 | |
| 322 | EXIM_DATUM_FREE(result_datum); /* Some DBM libs require freeing */ |
| 323 | return yield; |
| 324 | } |
| 325 | |
| 326 | |
| 327 | |
| 328 | /************************************************* |
| 329 | * Write to database file * |
| 330 | *************************************************/ |
| 331 | |
| 332 | /* |
| 333 | Arguments: |
| 334 | dbblock a pointer to an open database block |
| 335 | key the key of the record to be written |
| 336 | ptr a pointer to the record to be written |
| 337 | length the length of the record to be written |
| 338 | |
| 339 | Returns: the yield of the underlying dbm or db "write" function. If this |
| 340 | is dbm, the value is zero for OK. |
| 341 | */ |
| 342 | |
| 343 | int |
| 344 | dbfn_write(open_db *dbblock, const uschar *key, void *ptr, int length) |
| 345 | { |
| 346 | EXIM_DATUM key_datum, value_datum; |
| 347 | dbdata_generic *gptr = (dbdata_generic *)ptr; |
| 348 | int klen = Ustrlen(key) + 1; |
| 349 | uschar * key_copy = store_get(klen); |
| 350 | |
| 351 | memcpy(key_copy, key, klen); |
| 352 | gptr->time_stamp = time(NULL); |
| 353 | |
| 354 | DEBUG(D_hints_lookup) debug_printf_indent("dbfn_write: key=%s\n", key); |
| 355 | |
| 356 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */ |
| 357 | EXIM_DATUM_INIT(value_datum); /* to be cleared before use. */ |
| 358 | EXIM_DATUM_DATA(key_datum) = CS key_copy; |
| 359 | EXIM_DATUM_SIZE(key_datum) = klen; |
| 360 | EXIM_DATUM_DATA(value_datum) = CS ptr; |
| 361 | EXIM_DATUM_SIZE(value_datum) = length; |
| 362 | return EXIM_DBPUT(dbblock->dbptr, key_datum, value_datum); |
| 363 | } |
| 364 | |
| 365 | |
| 366 | |
| 367 | /************************************************* |
| 368 | * Delete record from database file * |
| 369 | *************************************************/ |
| 370 | |
| 371 | /* |
| 372 | Arguments: |
| 373 | dbblock a pointer to an open database block |
| 374 | key the key of the record to be deleted |
| 375 | |
| 376 | Returns: the yield of the underlying dbm or db "delete" function. |
| 377 | */ |
| 378 | |
| 379 | int |
| 380 | dbfn_delete(open_db *dbblock, const uschar *key) |
| 381 | { |
| 382 | int klen = Ustrlen(key) + 1; |
| 383 | uschar * key_copy = store_get(klen); |
| 384 | |
| 385 | DEBUG(D_hints_lookup) debug_printf_indent("dbfn_delete: key=%s\n", key); |
| 386 | |
| 387 | memcpy(key_copy, key, klen); |
| 388 | EXIM_DATUM key_datum; |
| 389 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require clearing */ |
| 390 | EXIM_DATUM_DATA(key_datum) = CS key_copy; |
| 391 | EXIM_DATUM_SIZE(key_datum) = klen; |
| 392 | return EXIM_DBDEL(dbblock->dbptr, key_datum); |
| 393 | } |
| 394 | |
| 395 | |
| 396 | |
| 397 | /************************************************* |
| 398 | * Scan the keys of a database file * |
| 399 | *************************************************/ |
| 400 | |
| 401 | /* |
| 402 | Arguments: |
| 403 | dbblock a pointer to an open database block |
| 404 | start TRUE if starting a new scan |
| 405 | FALSE if continuing with the current scan |
| 406 | cursor a pointer to a pointer to a cursor anchor, for those dbm libraries |
| 407 | that use the notion of a cursor |
| 408 | |
| 409 | Returns: the next record from the file, or |
| 410 | NULL if there are no more |
| 411 | */ |
| 412 | |
| 413 | uschar * |
| 414 | dbfn_scan(open_db *dbblock, BOOL start, EXIM_CURSOR **cursor) |
| 415 | { |
| 416 | EXIM_DATUM key_datum, value_datum; |
| 417 | uschar *yield; |
| 418 | value_datum = value_datum; /* dummy; not all db libraries use this */ |
| 419 | |
| 420 | DEBUG(D_hints_lookup) debug_printf_indent("dbfn_scan\n"); |
| 421 | |
| 422 | /* Some dbm require an initialization */ |
| 423 | |
| 424 | if (start) EXIM_DBCREATE_CURSOR(dbblock->dbptr, cursor); |
| 425 | |
| 426 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */ |
| 427 | EXIM_DATUM_INIT(value_datum); /* to be cleared before use. */ |
| 428 | |
| 429 | yield = (EXIM_DBSCAN(dbblock->dbptr, key_datum, value_datum, start, *cursor))? |
| 430 | US EXIM_DATUM_DATA(key_datum) : NULL; |
| 431 | |
| 432 | /* Some dbm require a termination */ |
| 433 | |
| 434 | if (!yield) EXIM_DBDELETE_CURSOR(*cursor); |
| 435 | return yield; |
| 436 | } |
| 437 | |
| 438 | |
| 439 | |
| 440 | /************************************************* |
| 441 | ************************************************** |
| 442 | * Stand-alone test program * |
| 443 | ************************************************** |
| 444 | *************************************************/ |
| 445 | |
| 446 | #ifdef STAND_ALONE |
| 447 | |
| 448 | int |
| 449 | main(int argc, char **cargv) |
| 450 | { |
| 451 | open_db dbblock[8]; |
| 452 | int max_db = sizeof(dbblock)/sizeof(open_db); |
| 453 | int current = -1; |
| 454 | int showtime = 0; |
| 455 | int i; |
| 456 | dbdata_wait *dbwait = NULL; |
| 457 | uschar **argv = USS cargv; |
| 458 | uschar buffer[256]; |
| 459 | uschar structbuffer[1024]; |
| 460 | |
| 461 | if (argc != 2) |
| 462 | { |
| 463 | printf("Usage: test_dbfn directory\n"); |
| 464 | printf("The subdirectory called \"db\" in the given directory is used for\n"); |
| 465 | printf("the files used in this test program.\n"); |
| 466 | return 1; |
| 467 | } |
| 468 | |
| 469 | /* Initialize */ |
| 470 | |
| 471 | spool_directory = argv[1]; |
| 472 | debug_selector = D_all - D_memory; |
| 473 | debug_file = stderr; |
| 474 | big_buffer = malloc(big_buffer_size); |
| 475 | |
| 476 | for (i = 0; i < max_db; i++) dbblock[i].dbptr = NULL; |
| 477 | |
| 478 | printf("\nExim's db functions tester: interface type is %s\n", EXIM_DBTYPE); |
| 479 | printf("DBM library: "); |
| 480 | |
| 481 | #ifdef DB_VERSION_STRING |
| 482 | printf("Berkeley DB: %s\n", DB_VERSION_STRING); |
| 483 | #elif defined(BTREEVERSION) && defined(HASHVERSION) |
| 484 | #ifdef USE_DB |
| 485 | printf("probably Berkeley DB version 1.8x (native mode)\n"); |
| 486 | #else |
| 487 | printf("probably Berkeley DB version 1.8x (compatibility mode)\n"); |
| 488 | #endif |
| 489 | #elif defined(_DBM_RDONLY) || defined(dbm_dirfno) |
| 490 | printf("probably ndbm\n"); |
| 491 | #elif defined(USE_TDB) |
| 492 | printf("using tdb\n"); |
| 493 | #else |
| 494 | #ifdef USE_GDBM |
| 495 | printf("probably GDBM (native mode)\n"); |
| 496 | #else |
| 497 | printf("probably GDBM (compatibility mode)\n"); |
| 498 | #endif |
| 499 | #endif |
| 500 | |
| 501 | /* Test the functions */ |
| 502 | |
| 503 | printf("\nTest the functions\n> "); |
| 504 | |
| 505 | while (Ufgets(buffer, 256, stdin) != NULL) |
| 506 | { |
| 507 | int len = Ustrlen(buffer); |
| 508 | int count = 1; |
| 509 | clock_t start = 1; |
| 510 | clock_t stop = 0; |
| 511 | uschar *cmd = buffer; |
| 512 | while (len > 0 && isspace((uschar)buffer[len-1])) len--; |
| 513 | buffer[len] = 0; |
| 514 | |
| 515 | if (isdigit((uschar)*cmd)) |
| 516 | { |
| 517 | count = Uatoi(cmd); |
| 518 | while (isdigit((uschar)*cmd)) cmd++; |
| 519 | while (isspace((uschar)*cmd)) cmd++; |
| 520 | } |
| 521 | |
| 522 | if (Ustrncmp(cmd, "open", 4) == 0) |
| 523 | { |
| 524 | int i; |
| 525 | open_db *odb; |
| 526 | uschar *s = cmd + 4; |
| 527 | while (isspace((uschar)*s)) s++; |
| 528 | |
| 529 | for (i = 0; i < max_db; i++) |
| 530 | if (dbblock[i].dbptr == NULL) break; |
| 531 | |
| 532 | if (i >= max_db) |
| 533 | { |
| 534 | printf("Too many open databases\n> "); |
| 535 | continue; |
| 536 | } |
| 537 | |
| 538 | start = clock(); |
| 539 | odb = dbfn_open(s, O_RDWR, dbblock + i, TRUE); |
| 540 | stop = clock(); |
| 541 | |
| 542 | if (odb) |
| 543 | { |
| 544 | current = i; |
| 545 | printf("opened %d\n", current); |
| 546 | } |
| 547 | /* Other error cases will have written messages */ |
| 548 | else if (errno == ENOENT) |
| 549 | { |
| 550 | printf("open failed: %s%s\n", strerror(errno), |
| 551 | #ifdef USE_DB |
| 552 | " (or other Berkeley DB error)" |
| 553 | #else |
| 554 | "" |
| 555 | #endif |
| 556 | ); |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | else if (Ustrncmp(cmd, "write", 5) == 0) |
| 561 | { |
| 562 | int rc = 0; |
| 563 | uschar *key = cmd + 5; |
| 564 | uschar *data; |
| 565 | |
| 566 | if (current < 0) |
| 567 | { |
| 568 | printf("No current database\n"); |
| 569 | continue; |
| 570 | } |
| 571 | |
| 572 | while (isspace((uschar)*key)) key++; |
| 573 | data = key; |
| 574 | while (*data != 0 && !isspace((uschar)*data)) data++; |
| 575 | *data++ = 0; |
| 576 | while (isspace((uschar)*data)) data++; |
| 577 | |
| 578 | dbwait = (dbdata_wait *)(&structbuffer); |
| 579 | Ustrcpy(dbwait->text, data); |
| 580 | |
| 581 | start = clock(); |
| 582 | while (count-- > 0) |
| 583 | rc = dbfn_write(dbblock + current, key, dbwait, |
| 584 | Ustrlen(data) + sizeof(dbdata_wait)); |
| 585 | stop = clock(); |
| 586 | if (rc != 0) printf("Failed: %s\n", strerror(errno)); |
| 587 | } |
| 588 | |
| 589 | else if (Ustrncmp(cmd, "read", 4) == 0) |
| 590 | { |
| 591 | uschar *key = cmd + 4; |
| 592 | if (current < 0) |
| 593 | { |
| 594 | printf("No current database\n"); |
| 595 | continue; |
| 596 | } |
| 597 | while (isspace((uschar)*key)) key++; |
| 598 | start = clock(); |
| 599 | while (count-- > 0) |
| 600 | dbwait = (dbdata_wait *)dbfn_read_with_length(dbblock+ current, key, NULL); |
| 601 | stop = clock(); |
| 602 | printf("%s\n", (dbwait == NULL)? "<not found>" : CS dbwait->text); |
| 603 | } |
| 604 | |
| 605 | else if (Ustrncmp(cmd, "delete", 6) == 0) |
| 606 | { |
| 607 | uschar *key = cmd + 6; |
| 608 | if (current < 0) |
| 609 | { |
| 610 | printf("No current database\n"); |
| 611 | continue; |
| 612 | } |
| 613 | while (isspace((uschar)*key)) key++; |
| 614 | dbfn_delete(dbblock + current, key); |
| 615 | } |
| 616 | |
| 617 | else if (Ustrncmp(cmd, "scan", 4) == 0) |
| 618 | { |
| 619 | EXIM_CURSOR *cursor; |
| 620 | BOOL startflag = TRUE; |
| 621 | uschar *key; |
| 622 | uschar keybuffer[256]; |
| 623 | if (current < 0) |
| 624 | { |
| 625 | printf("No current database\n"); |
| 626 | continue; |
| 627 | } |
| 628 | start = clock(); |
| 629 | while ((key = dbfn_scan(dbblock + current, startflag, &cursor)) != NULL) |
| 630 | { |
| 631 | startflag = FALSE; |
| 632 | Ustrcpy(keybuffer, key); |
| 633 | dbwait = (dbdata_wait *)dbfn_read_with_length(dbblock + current, |
| 634 | keybuffer, NULL); |
| 635 | printf("%s: %s\n", keybuffer, dbwait->text); |
| 636 | } |
| 637 | stop = clock(); |
| 638 | printf("End of scan\n"); |
| 639 | } |
| 640 | |
| 641 | else if (Ustrncmp(cmd, "close", 5) == 0) |
| 642 | { |
| 643 | uschar *s = cmd + 5; |
| 644 | while (isspace((uschar)*s)) s++; |
| 645 | i = Uatoi(s); |
| 646 | if (i >= max_db || dbblock[i].dbptr == NULL) printf("Not open\n"); else |
| 647 | { |
| 648 | start = clock(); |
| 649 | dbfn_close(dbblock + i); |
| 650 | stop = clock(); |
| 651 | dbblock[i].dbptr = NULL; |
| 652 | if (i == current) current = -1; |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | else if (Ustrncmp(cmd, "file", 4) == 0) |
| 657 | { |
| 658 | uschar *s = cmd + 4; |
| 659 | while (isspace((uschar)*s)) s++; |
| 660 | i = Uatoi(s); |
| 661 | if (i >= max_db || dbblock[i].dbptr == NULL) printf("Not open\n"); |
| 662 | else current = i; |
| 663 | } |
| 664 | |
| 665 | else if (Ustrncmp(cmd, "time", 4) == 0) |
| 666 | { |
| 667 | showtime = ~showtime; |
| 668 | printf("Timing %s\n", showtime? "on" : "off"); |
| 669 | } |
| 670 | |
| 671 | else if (Ustrcmp(cmd, "q") == 0 || Ustrncmp(cmd, "quit", 4) == 0) break; |
| 672 | |
| 673 | else if (Ustrncmp(cmd, "help", 4) == 0) |
| 674 | { |
| 675 | printf("close [<number>] close file [<number>]\n"); |
| 676 | printf("delete <key> remove record from current file\n"); |
| 677 | printf("file <number> make file <number> current\n"); |
| 678 | printf("open <name> open db file\n"); |
| 679 | printf("q[uit] exit program\n"); |
| 680 | printf("read <key> read record from current file\n"); |
| 681 | printf("scan scan current file\n"); |
| 682 | printf("time time display on/off\n"); |
| 683 | printf("write <key> <rest-of-line> write record to current file\n"); |
| 684 | } |
| 685 | |
| 686 | else printf("Eh?\n"); |
| 687 | |
| 688 | if (showtime && stop >= start) |
| 689 | printf("start=%d stop=%d difference=%d\n", (int)start, (int)stop, |
| 690 | (int)(stop - start)); |
| 691 | |
| 692 | printf("> "); |
| 693 | } |
| 694 | |
| 695 | for (i = 0; i < max_db; i++) |
| 696 | { |
| 697 | if (dbblock[i].dbptr != NULL) |
| 698 | { |
| 699 | printf("\nClosing %d", i); |
| 700 | dbfn_close(dbblock + i); |
| 701 | } |
| 702 | } |
| 703 | |
| 704 | printf("\n"); |
| 705 | return 0; |
| 706 | } |
| 707 | |
| 708 | #endif |
| 709 | |
| 710 | /* End of dbfn.c */ |