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],"slaveof") && argc == 3) {
 142             server.masterhost = sdsnew(argv[1]);
 143             server.masterport = atoi(argv[2]);
 144             server.replstate = REDIS_REPL_CONNECT;
 145         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
 146                 server.masterauth = zstrdup(argv[1]);
 147         } else if (!strcasecmp(argv[0],"glueoutputbuf") && argc == 2) {
 148             if ((server.glueoutputbuf = yesnotoi(argv[1])) == -1) {
 149                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 150             }
 151         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 152             if ((server.rdbcompression = yesnotoi(argv[1])) == -1) {
 153                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 154             }
 155         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 156             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 157                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 158             }
 159         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 160             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 161                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 162             }
 163         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 164             if ((server.appendonly = yesnotoi(argv[1])) == -1) {
 165                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 166             }
 167         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 168             zfree(server.appendfilename);
 169             server.appendfilename = zstrdup(argv[1]);
 170         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 171                    && argc == 2) {
 172             if ((server.no_appendfsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 173                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 174             }
 175         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 176             if (!strcasecmp(argv[1],"no")) {
 177                 server.appendfsync = APPENDFSYNC_NO;
 178             } else if (!strcasecmp(argv[1],"always")) {
 179                 server.appendfsync = APPENDFSYNC_ALWAYS;
 180             } else if (!strcasecmp(argv[1],"everysec")) {
 181                 server.appendfsync = APPENDFSYNC_EVERYSEC;
 182             } else {
 183                 err = "argument must be 'no', 'always' or 'everysec'";
 184                 goto loaderr;
 185             }
 186         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 187             server.requirepass = zstrdup(argv[1]);
 188         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 189             zfree(server.pidfile);
 190             server.pidfile = zstrdup(argv[1]);
 191         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 192             zfree(server.dbfilename);
 193             server.dbfilename = zstrdup(argv[1]);
 194         } else if (!strcasecmp(argv[0],"vm-enabled") && argc == 2) {
 195             if ((server.vm_enabled = yesnotoi(argv[1])) == -1) {
 196                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 197             }
 198         } else if (!strcasecmp(argv[0],"vm-swap-file") && argc == 2) {
 199             zfree(server.vm_swap_file);
 200             server.vm_swap_file = zstrdup(argv[1]);
 201         } else if (!strcasecmp(argv[0],"vm-max-memory") && argc == 2) {
 202             server.vm_max_memory = memtoll(argv[1],NULL);
 203         } else if (!strcasecmp(argv[0],"vm-page-size") && argc == 2) {
 204             server.vm_page_size = memtoll(argv[1], NULL);
 205         } else if (!strcasecmp(argv[0],"vm-pages") && argc == 2) {
 206             server.vm_pages = memtoll(argv[1], NULL);
 207         } else if (!strcasecmp(argv[0],"vm-max-threads") && argc == 2) {
 208             server.vm_max_threads = strtoll(argv[1], NULL, 10);
 209         } else if (!strcasecmp(argv[0],"hash-max-zipmap-entries") && argc == 2){
 210             server.hash_max_zipmap_entries = memtoll(argv[1], NULL);
 211         } else if (!strcasecmp(argv[0],"hash-max-zipmap-value") && argc == 2){
 212             server.hash_max_zipmap_value = memtoll(argv[1], NULL);
 213         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 214             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 215         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2){
 216             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 217         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2){
 218             server.set_max_intset_entries = memtoll(argv[1], NULL);
 219         } else {
 220             err = "Bad directive or wrong number of arguments"; goto loaderr;
 221         }
 222         for (j = 0; j < argc; j++)
 223             sdsfree(argv[j]);
 224         zfree(argv);
 225         sdsfree(line);
 226     }
 227     if (fp != stdin) fclose(fp);
 228     return;
 229
 230 loaderr:
 231     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 232     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 233     fprintf(stderr, ">>> '%s'\n", line);
 234     fprintf(stderr, "%s\n", err);
 235     exit(1);
 236 }
 237
 238 /*-----------------------------------------------------------------------------
 239  * CONFIG command for remote configuration
 240  *----------------------------------------------------------------------------*/
 241
 242 void configSetCommand(redisClient *c) {
 243     robj *o = getDecodedObject(c->argv[3]);
 244     long long ll;
 245
 246     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 247         zfree(server.dbfilename);
 248         server.dbfilename = zstrdup(o->ptr);
 249     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 250         zfree(server.requirepass);
 251         server.requirepass = zstrdup(o->ptr);
 252     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 253         zfree(server.masterauth);
 254         server.masterauth = zstrdup(o->ptr);
 255     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 256         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 257             ll < 0) goto badfmt;
 258         server.maxmemory = ll;
 259         if (server.maxmemory) freeMemoryIfNeeded();
 260     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 261         if (!strcasecmp(o->ptr,"volatile-lru")) {
 262             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 263         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 264             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 265         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 266             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 267         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 268             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 269         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 270             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 271         } else {
 272             goto badfmt;
 273         }
 274     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 275         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 276             ll < 0 || ll > LONG_MAX) goto badfmt;
 277         server.maxidletime = ll;
 278     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 279         if (!strcasecmp(o->ptr,"no")) {
 280             server.appendfsync = APPENDFSYNC_NO;
 281         } else if (!strcasecmp(o->ptr,"everysec")) {
 282             server.appendfsync = APPENDFSYNC_EVERYSEC;
 283         } else if (!strcasecmp(o->ptr,"always")) {
 284             server.appendfsync = APPENDFSYNC_ALWAYS;
 285         } else {
 286             goto badfmt;
 287         }
 288     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 289         int yn = yesnotoi(o->ptr);
 290
 291         if (yn == -1) goto badfmt;
 292         server.no_appendfsync_on_rewrite = yn;
 293     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 294         int old = server.appendonly;
 295         int new = yesnotoi(o->ptr);
 296
 297         if (new == -1) goto badfmt;
 298         if (old != new) {
 299             if (new == 0) {
 300                 stopAppendOnly();
 301             } else {
 302                 if (startAppendOnly() == REDIS_ERR) {
 303                     addReplyError(c,
 304                         "Unable to turn on AOF. Check server logs.");
 305                     decrRefCount(o);
 306                     return;
 307                 }
 308             }
 309         }
 310     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 311         int vlen, j;
 312         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 313
 314         /* Perform sanity check before setting the new config:
 315          * - Even number of args
 316          * - Seconds >= 1, changes >= 0 */
 317         if (vlen & 1) {
 318             sdsfreesplitres(v,vlen);
 319             goto badfmt;
 320         }
 321         for (j = 0; j < vlen; j++) {
 322             char *eptr;
 323             long val;
 324
 325             val = strtoll(v[j], &eptr, 10);
 326             if (eptr[0] != '\0' ||
 327                 ((j & 1) == 0 && val < 1) ||
 328                 ((j & 1) == 1 && val < 0)) {
 329                 sdsfreesplitres(v,vlen);
 330                 goto badfmt;
 331             }
 332         }
 333         /* Finally set the new config */
 334         resetServerSaveParams();
 335         for (j = 0; j < vlen; j += 2) {
 336             time_t seconds;
 337             int changes;
 338
 339             seconds = strtoll(v[j],NULL,10);
 340             changes = strtoll(v[j+1],NULL,10);
 341             appendServerSaveParams(seconds, changes);
 342         }
 343         sdsfreesplitres(v,vlen);
 344     } else {
 345         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 346             (char*)c->argv[2]->ptr);
 347         decrRefCount(o);
 348         return;
 349     }
 350     decrRefCount(o);
 351     addReply(c,shared.ok);
 352     return;
 353
 354 badfmt: /* Bad format errors */
 355     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 356             (char*)o->ptr,
 357             (char*)c->argv[2]->ptr);
 358     decrRefCount(o);
 359 }
 360
 361 void configGetCommand(redisClient *c) {
 362     robj *o = getDecodedObject(c->argv[2]);
 363     void *replylen = addDeferredMultiBulkLength(c);
 364     char *pattern = o->ptr;
 365     int matches = 0;
 366
 367     if (stringmatch(pattern,"dbfilename",0)) {
 368         addReplyBulkCString(c,"dbfilename");
 369         addReplyBulkCString(c,server.dbfilename);
 370         matches++;
 371     }
 372     if (stringmatch(pattern,"requirepass",0)) {
 373         addReplyBulkCString(c,"requirepass");
 374         addReplyBulkCString(c,server.requirepass);
 375         matches++;
 376     }
 377     if (stringmatch(pattern,"masterauth",0)) {
 378         addReplyBulkCString(c,"masterauth");
 379         addReplyBulkCString(c,server.masterauth);
 380         matches++;
 381     }
 382     if (stringmatch(pattern,"maxmemory",0)) {
 383         char buf[128];
 384
 385         ll2string(buf,128,server.maxmemory);
 386         addReplyBulkCString(c,"maxmemory");
 387         addReplyBulkCString(c,buf);
 388         matches++;
 389     }
 390     if (stringmatch(pattern,"maxmemory-policy",0)) {
 391         char *s;
 392
 393         switch(server.maxmemory_policy) {
 394         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 395         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 396         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 397         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 398         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 399         default: s = "unknown"; break; /* too harmless to panic */
 400         }
 401         addReplyBulkCString(c,"maxmemory-policy");
 402         addReplyBulkCString(c,s);
 403         matches++;
 404     }
 405     if (stringmatch(pattern,"timeout",0)) {
 406         char buf[128];
 407
 408         ll2string(buf,128,server.maxidletime);
 409         addReplyBulkCString(c,"timeout");
 410         addReplyBulkCString(c,buf);
 411         matches++;
 412     }
 413     if (stringmatch(pattern,"appendonly",0)) {
 414         addReplyBulkCString(c,"appendonly");
 415         addReplyBulkCString(c,server.appendonly ? "yes" : "no");
 416         matches++;
 417     }
 418     if (stringmatch(pattern,"no-appendfsync-on-rewrite",0)) {
 419         addReplyBulkCString(c,"no-appendfsync-on-rewrite");
 420         addReplyBulkCString(c,server.no_appendfsync_on_rewrite ? "yes" : "no");
 421         matches++;
 422     }
 423     if (stringmatch(pattern,"appendfsync",0)) {
 424         char *policy;
 425
 426         switch(server.appendfsync) {
 427         case APPENDFSYNC_NO: policy = "no"; break;
 428         case APPENDFSYNC_EVERYSEC: policy = "everysec"; break;
 429         case APPENDFSYNC_ALWAYS: policy = "always"; break;
 430         default: policy = "unknown"; break; /* too harmless to panic */
 431         }
 432         addReplyBulkCString(c,"appendfsync");
 433         addReplyBulkCString(c,policy);
 434         matches++;
 435     }
 436     if (stringmatch(pattern,"save",0)) {
 437         sds buf = sdsempty();
 438         int j;
 439
 440         for (j = 0; j < server.saveparamslen; j++) {
 441             buf = sdscatprintf(buf,"%ld %d",
 442                     server.saveparams[j].seconds,
 443                     server.saveparams[j].changes);
 444             if (j != server.saveparamslen-1)
 445                 buf = sdscatlen(buf," ",1);
 446         }
 447         addReplyBulkCString(c,"save");
 448         addReplyBulkCString(c,buf);
 449         sdsfree(buf);
 450         matches++;
 451     }
 452     decrRefCount(o);
 453     setDeferredMultiBulkLength(c,replylen,matches*2);
 454 }
 455
 456 void configCommand(redisClient *c) {
 457     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 458         if (c->argc != 4) goto badarity;
 459         configSetCommand(c);
 460     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 461         if (c->argc != 3) goto badarity;
 462         configGetCommand(c);
 463     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 464         if (c->argc != 2) goto badarity;
 465         server.stat_numcommands = 0;
 466         server.stat_numconnections = 0;
 467         server.stat_expiredkeys = 0;
 468         server.stat_starttime = time(NULL);
 469         addReply(c,shared.ok);
 470     } else {
 471         addReplyError(c,
 472             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 473     }
 474     return;
 475
 476 badarity:
 477     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 478         (char*) c->argv[1]->ptr);
 479 }