src/config.c

   1 #include "redis.h"
   2
   3 /*-----------------------------------------------------------------------------
   4  * Config file parsing
   5  *----------------------------------------------------------------------------*/
   6
   7 int yesnotoi(char *s) {
   8     if (!strcasecmp(s,"yes")) return 1;
   9     else if (!strcasecmp(s,"no")) return 0;
  10     else return -1;
  11 }
  12
  13 void appendServerSaveParams(time_t seconds, int changes) {
  14     server.saveparams = zrealloc(server.saveparams,sizeof(struct saveparam)*(server.saveparamslen+1));
  15     server.saveparams[server.saveparamslen].seconds = seconds;
  16     server.saveparams[server.saveparamslen].changes = changes;
  17     server.saveparamslen++;
  18 }
  19
  20 void resetServerSaveParams() {
  21     zfree(server.saveparams);
  22     server.saveparams = NULL;
  23     server.saveparamslen = 0;
  24 }
  25
  26 /* I agree, this is a very rudimental way to load a configuration...
  27    will improve later if the config gets more complex */
  28 void loadServerConfig(char *filename) {
  29     FILE *fp;
  30     char buf[REDIS_CONFIGLINE_MAX+1], *err = NULL;
  31     int linenum = 0;
  32     sds line = NULL;
  33
  34     if (filename[0] == '-' && filename[1] == '\0')
  35         fp = stdin;
  36     else {
  37         if ((fp = fopen(filename,"r")) == NULL) {
  38             redisLog(REDIS_WARNING, "Fatal error, can't open config file '%s'", filename);
  39             exit(1);
  40         }
  41     }
  42
  43     while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL) {
  44         sds *argv;
  45         int argc, j;
  46
  47         linenum++;
  48         line = sdsnew(buf);
  49         line = sdstrim(line," \t\r\n");
  50
  51         /* Skip comments and blank lines*/
  52         if (line[0] == '#' || line[0] == '\0') {
  53             sdsfree(line);
  54             continue;
  55         }
  56
  57         /* Split into arguments */
  58         argv = sdssplitlen(line,sdslen(line)," ",1,&argc);
  59         sdstolower(argv[0]);
  60
  61         /* Execute config directives */
  62         if (!strcasecmp(argv[0],"timeout") && argc == 2) {
  63             server.maxidletime = atoi(argv[1]);
  64             if (server.maxidletime < 0) {
  65                 err = "Invalid timeout value"; goto loaderr;
  66             }
  67         } else if (!strcasecmp(argv[0],"port") && argc == 2) {
  68             server.port = atoi(argv[1]);
  69             if (server.port < 1 || server.port > 65535) {
  70                 err = "Invalid port"; goto loaderr;
  71             }
  72         } else if (!strcasecmp(argv[0],"bind") && argc == 2) {
  73             server.bindaddr = zstrdup(argv[1]);
  74         } else if (!strcasecmp(argv[0],"save") && argc == 3) {
  75             int seconds = atoi(argv[1]);
  76             int changes = atoi(argv[2]);
  77             if (seconds < 1 || changes < 0) {
  78                 err = "Invalid save parameters"; goto loaderr;
  79             }
  80             appendServerSaveParams(seconds,changes);
  81         } else if (!strcasecmp(argv[0],"dir") && argc == 2) {
  82             if (chdir(argv[1]) == -1) {
  83                 redisLog(REDIS_WARNING,"Can't chdir to '%s': %s",
  84                     argv[1], strerror(errno));
  85                 exit(1);
  86             }
  87         } else if (!strcasecmp(argv[0],"loglevel") && argc == 2) {
  88             if (!strcasecmp(argv[1],"debug")) server.verbosity = REDIS_DEBUG;
  89             else if (!strcasecmp(argv[1],"verbose")) server.verbosity = REDIS_VERBOSE;
  90             else if (!strcasecmp(argv[1],"notice")) server.verbosity = REDIS_NOTICE;
  91             else if (!strcasecmp(argv[1],"warning")) server.verbosity = REDIS_WARNING;
  92             else {
  93                 err = "Invalid log level. Must be one of debug, notice, warning";
  94                 goto loaderr;
  95             }
  96         } else if (!strcasecmp(argv[0],"logfile") && argc == 2) {
  97             FILE *logfp;
  98
  99             server.logfile = zstrdup(argv[1]);
 100             if (!strcasecmp(server.logfile,"stdout")) {
 101                 zfree(server.logfile);
 102                 server.logfile = NULL;
 103             }
 104             if (server.logfile) {
 105                 /* Test if we are able to open the file. The server will not
 106                  * be able to abort just for this problem later... */
 107                 logfp = fopen(server.logfile,"a");
 108                 if (logfp == NULL) {
 109                     err = sdscatprintf(sdsempty(),
 110                         "Can't open the log file: %s", strerror(errno));
 111                     goto loaderr;
 112                 }
 113                 fclose(logfp);
 114             }
 115         } else if (!strcasecmp(argv[0],"databases") && argc == 2) {
 116             server.dbnum = atoi(argv[1]);
 117             if (server.dbnum < 1) {
 118                 err = "Invalid number of databases"; goto loaderr;
 119             }
 120         } else if (!strcasecmp(argv[0],"include") && argc == 2) {
 121             loadServerConfig(argv[1]);
 122         } else if (!strcasecmp(argv[0],"maxclients") && argc == 2) {
 123             server.maxclients = atoi(argv[1]);
 124         } else if (!strcasecmp(argv[0],"maxmemory") && argc == 2) {
 125             server.maxmemory = memtoll(argv[1],NULL);
 126         } else if (!strcasecmp(argv[0],"maxmemory-policy") && argc == 2) {
 127             if (!strcasecmp(argv[1],"volatile-lru")) {
 128                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 129             } else if (!strcasecmp(argv[1],"volatile-random")) {
 130                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 131             } else if (!strcasecmp(argv[1],"volatile-ttl")) {
 132                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 133             } else if (!strcasecmp(argv[1],"allkeys-lru")) {
 134                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 135             } else if (!strcasecmp(argv[1],"allkeys-random")) {
 136                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 137             } else {
 138                 err = "Invalid maxmemory policy";
 139                 goto loaderr;
 140             }
 141         } else if (!strcasecmp(argv[0],"maxmemory-samples") && argc == 2) {
 142             server.maxmemory_samples = atoi(argv[1]);
 143             if (server.maxmemory_samples <= 0) {
 144                 err = "maxmemory-samples must be 1 or greater";
 145                 goto loaderr;
 146             }
 147         } else if (!strcasecmp(argv[0],"slaveof") && argc == 3) {
 148             server.masterhost = sdsnew(argv[1]);
 149             server.masterport = atoi(argv[2]);
 150             server.replstate = REDIS_REPL_CONNECT;
 151         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
 152                 server.masterauth = zstrdup(argv[1]);
 153         } else if (!strcasecmp(argv[0],"glueoutputbuf") && argc == 2) {
 154             if ((server.glueoutputbuf = yesnotoi(argv[1])) == -1) {
 155                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 156             }
 157         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 158             if ((server.rdbcompression = yesnotoi(argv[1])) == -1) {
 159                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 160             }
 161         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 162             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 163                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 164             }
 165         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 166             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 167                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 168             }
 169         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 170             if ((server.appendonly = yesnotoi(argv[1])) == -1) {
 171                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 172             }
 173         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 174             zfree(server.appendfilename);
 175             server.appendfilename = zstrdup(argv[1]);
 176         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 177                    && argc == 2) {
 178             if ((server.no_appendfsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 179                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 180             }
 181         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 182             if (!strcasecmp(argv[1],"no")) {
 183                 server.appendfsync = APPENDFSYNC_NO;
 184             } else if (!strcasecmp(argv[1],"always")) {
 185                 server.appendfsync = APPENDFSYNC_ALWAYS;
 186             } else if (!strcasecmp(argv[1],"everysec")) {
 187                 server.appendfsync = APPENDFSYNC_EVERYSEC;
 188             } else {
 189                 err = "argument must be 'no', 'always' or 'everysec'";
 190                 goto loaderr;
 191             }
 192         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 193             server.requirepass = zstrdup(argv[1]);
 194         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 195             zfree(server.pidfile);
 196             server.pidfile = zstrdup(argv[1]);
 197         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 198             zfree(server.dbfilename);
 199             server.dbfilename = zstrdup(argv[1]);
 200         } else if (!strcasecmp(argv[0],"vm-enabled") && argc == 2) {
 201             if ((server.vm_enabled = yesnotoi(argv[1])) == -1) {
 202                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 203             }
 204         } else if (!strcasecmp(argv[0],"vm-swap-file") && argc == 2) {
 205             zfree(server.vm_swap_file);
 206             server.vm_swap_file = zstrdup(argv[1]);
 207         } else if (!strcasecmp(argv[0],"vm-max-memory") && argc == 2) {
 208             server.vm_max_memory = memtoll(argv[1],NULL);
 209         } else if (!strcasecmp(argv[0],"vm-page-size") && argc == 2) {
 210             server.vm_page_size = memtoll(argv[1], NULL);
 211         } else if (!strcasecmp(argv[0],"vm-pages") && argc == 2) {
 212             server.vm_pages = memtoll(argv[1], NULL);
 213         } else if (!strcasecmp(argv[0],"vm-max-threads") && argc == 2) {
 214             server.vm_max_threads = strtoll(argv[1], NULL, 10);
 215         } else if (!strcasecmp(argv[0],"hash-max-zipmap-entries") && argc == 2){
 216             server.hash_max_zipmap_entries = memtoll(argv[1], NULL);
 217         } else if (!strcasecmp(argv[0],"hash-max-zipmap-value") && argc == 2){
 218             server.hash_max_zipmap_value = memtoll(argv[1], NULL);
 219         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 220             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 221         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2){
 222             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 223         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2){
 224             server.set_max_intset_entries = memtoll(argv[1], NULL);
 225         } else {
 226             err = "Bad directive or wrong number of arguments"; goto loaderr;
 227         }
 228         for (j = 0; j < argc; j++)
 229             sdsfree(argv[j]);
 230         zfree(argv);
 231         sdsfree(line);
 232     }
 233     if (fp != stdin) fclose(fp);
 234     return;
 235
 236 loaderr:
 237     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 238     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 239     fprintf(stderr, ">>> '%s'\n", line);
 240     fprintf(stderr, "%s\n", err);
 241     exit(1);
 242 }
 243
 244 /*-----------------------------------------------------------------------------
 245  * CONFIG command for remote configuration
 246  *----------------------------------------------------------------------------*/
 247
 248 void configSetCommand(redisClient *c) {
 249     robj *o = getDecodedObject(c->argv[3]);
 250     long long ll;
 251
 252     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 253         zfree(server.dbfilename);
 254         server.dbfilename = zstrdup(o->ptr);
 255     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 256         zfree(server.requirepass);
 257         server.requirepass = zstrdup(o->ptr);
 258     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 259         zfree(server.masterauth);
 260         server.masterauth = zstrdup(o->ptr);
 261     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 262         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 263             ll < 0) goto badfmt;
 264         server.maxmemory = ll;
 265         if (server.maxmemory) freeMemoryIfNeeded();
 266     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 267         if (!strcasecmp(o->ptr,"volatile-lru")) {
 268             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 269         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 270             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 271         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 272             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 273         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 274             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 275         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 276             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 277         } else {
 278             goto badfmt;
 279         }
 280     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 281         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 282             ll <= 0) goto badfmt;
 283         server.maxmemory_samples = ll;
 284     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 285         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 286             ll < 0 || ll > LONG_MAX) goto badfmt;
 287         server.maxidletime = ll;
 288     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 289         if (!strcasecmp(o->ptr,"no")) {
 290             server.appendfsync = APPENDFSYNC_NO;
 291         } else if (!strcasecmp(o->ptr,"everysec")) {
 292             server.appendfsync = APPENDFSYNC_EVERYSEC;
 293         } else if (!strcasecmp(o->ptr,"always")) {
 294             server.appendfsync = APPENDFSYNC_ALWAYS;
 295         } else {
 296             goto badfmt;
 297         }
 298     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 299         int yn = yesnotoi(o->ptr);
 300
 301         if (yn == -1) goto badfmt;
 302         server.no_appendfsync_on_rewrite = yn;
 303     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 304         int old = server.appendonly;
 305         int new = yesnotoi(o->ptr);
 306
 307         if (new == -1) goto badfmt;
 308         if (old != new) {
 309             if (new == 0) {
 310                 stopAppendOnly();
 311             } else {
 312                 if (startAppendOnly() == REDIS_ERR) {
 313                     addReplyError(c,
 314                         "Unable to turn on AOF. Check server logs.");
 315                     decrRefCount(o);
 316                     return;
 317                 }
 318             }
 319         }
 320     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 321         int vlen, j;
 322         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 323
 324         /* Perform sanity check before setting the new config:
 325          * - Even number of args
 326          * - Seconds >= 1, changes >= 0 */
 327         if (vlen & 1) {
 328             sdsfreesplitres(v,vlen);
 329             goto badfmt;
 330         }
 331         for (j = 0; j < vlen; j++) {
 332             char *eptr;
 333             long val;
 334
 335             val = strtoll(v[j], &eptr, 10);
 336             if (eptr[0] != '\0' ||
 337                 ((j & 1) == 0 && val < 1) ||
 338                 ((j & 1) == 1 && val < 0)) {
 339                 sdsfreesplitres(v,vlen);
 340                 goto badfmt;
 341             }
 342         }
 343         /* Finally set the new config */
 344         resetServerSaveParams();
 345         for (j = 0; j < vlen; j += 2) {
 346             time_t seconds;
 347             int changes;
 348
 349             seconds = strtoll(v[j],NULL,10);
 350             changes = strtoll(v[j+1],NULL,10);
 351             appendServerSaveParams(seconds, changes);
 352         }
 353         sdsfreesplitres(v,vlen);
 354     } else {
 355         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 356             (char*)c->argv[2]->ptr);
 357         decrRefCount(o);
 358         return;
 359     }
 360     decrRefCount(o);
 361     addReply(c,shared.ok);
 362     return;
 363
 364 badfmt: /* Bad format errors */
 365     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 366             (char*)o->ptr,
 367             (char*)c->argv[2]->ptr);
 368     decrRefCount(o);
 369 }
 370
 371 void configGetCommand(redisClient *c) {
 372     robj *o = getDecodedObject(c->argv[2]);
 373     void *replylen = addDeferredMultiBulkLength(c);
 374     char *pattern = o->ptr;
 375     char buf[128];
 376     int matches = 0;
 377
 378     if (stringmatch(pattern,"dbfilename",0)) {
 379         addReplyBulkCString(c,"dbfilename");
 380         addReplyBulkCString(c,server.dbfilename);
 381         matches++;
 382     }
 383     if (stringmatch(pattern,"requirepass",0)) {
 384         addReplyBulkCString(c,"requirepass");
 385         addReplyBulkCString(c,server.requirepass);
 386         matches++;
 387     }
 388     if (stringmatch(pattern,"masterauth",0)) {
 389         addReplyBulkCString(c,"masterauth");
 390         addReplyBulkCString(c,server.masterauth);
 391         matches++;
 392     }
 393     if (stringmatch(pattern,"maxmemory",0)) {
 394         ll2string(buf,sizeof(buf),server.maxmemory);
 395         addReplyBulkCString(c,"maxmemory");
 396         addReplyBulkCString(c,buf);
 397         matches++;
 398     }
 399     if (stringmatch(pattern,"maxmemory-policy",0)) {
 400         char *s;
 401
 402         switch(server.maxmemory_policy) {
 403         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 404         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 405         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 406         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 407         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 408         default: s = "unknown"; break; /* too harmless to panic */
 409         }
 410         addReplyBulkCString(c,"maxmemory-policy");
 411         addReplyBulkCString(c,s);
 412         matches++;
 413     }
 414     if (stringmatch(pattern,"maxmemory-samples",0)) {
 415         ll2string(buf,sizeof(buf),server.maxmemory_samples);
 416         addReplyBulkCString(c,"maxmemory-samples");
 417         addReplyBulkCString(c,buf);
 418         matches++;
 419     }
 420     if (stringmatch(pattern,"timeout",0)) {
 421         ll2string(buf,sizeof(buf),server.maxidletime);
 422         addReplyBulkCString(c,"timeout");
 423         addReplyBulkCString(c,buf);
 424         matches++;
 425     }
 426     if (stringmatch(pattern,"appendonly",0)) {
 427         addReplyBulkCString(c,"appendonly");
 428         addReplyBulkCString(c,server.appendonly ? "yes" : "no");
 429         matches++;
 430     }
 431     if (stringmatch(pattern,"no-appendfsync-on-rewrite",0)) {
 432         addReplyBulkCString(c,"no-appendfsync-on-rewrite");
 433         addReplyBulkCString(c,server.no_appendfsync_on_rewrite ? "yes" : "no");
 434         matches++;
 435     }
 436     if (stringmatch(pattern,"appendfsync",0)) {
 437         char *policy;
 438
 439         switch(server.appendfsync) {
 440         case APPENDFSYNC_NO: policy = "no"; break;
 441         case APPENDFSYNC_EVERYSEC: policy = "everysec"; break;
 442         case APPENDFSYNC_ALWAYS: policy = "always"; break;
 443         default: policy = "unknown"; break; /* too harmless to panic */
 444         }
 445         addReplyBulkCString(c,"appendfsync");
 446         addReplyBulkCString(c,policy);
 447         matches++;
 448     }
 449     if (stringmatch(pattern,"save",0)) {
 450         sds buf = sdsempty();
 451         int j;
 452
 453         for (j = 0; j < server.saveparamslen; j++) {
 454             buf = sdscatprintf(buf,"%ld %d",
 455                     server.saveparams[j].seconds,
 456                     server.saveparams[j].changes);
 457             if (j != server.saveparamslen-1)
 458                 buf = sdscatlen(buf," ",1);
 459         }
 460         addReplyBulkCString(c,"save");
 461         addReplyBulkCString(c,buf);
 462         sdsfree(buf);
 463         matches++;
 464     }
 465     decrRefCount(o);
 466     setDeferredMultiBulkLength(c,replylen,matches*2);
 467 }
 468
 469 void configCommand(redisClient *c) {
 470     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 471         if (c->argc != 4) goto badarity;
 472         configSetCommand(c);
 473     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 474         if (c->argc != 3) goto badarity;
 475         configGetCommand(c);
 476     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 477         if (c->argc != 2) goto badarity;
 478         server.stat_numcommands = 0;
 479         server.stat_numconnections = 0;
 480         server.stat_expiredkeys = 0;
 481         server.stat_starttime = time(NULL);
 482         addReply(c,shared.ok);
 483     } else {
 484         addReplyError(c,
 485             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 486     }
 487     return;
 488
 489 badarity:
 490     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 491         (char*) c->argv[1]->ptr);
 492 }