src/config.c

   1 /* Configuration file parsing and CONFIG GET/SET commands implementation.
   2  *
   3  * Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  *   * Redistributions of source code must retain the above copyright notice,
  10  *     this list of conditions and the following disclaimer.
  11  *   * Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *   * Neither the name of Redis nor the names of its contributors may be used
  15  *     to endorse or promote products derived from this software without
  16  *     specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31
  32 #include "redis.h"
  33
  34 /*-----------------------------------------------------------------------------
  35  * Config file parsing
  36  *----------------------------------------------------------------------------*/
  37
  38 int yesnotoi(char *s) {
  39     if (!strcasecmp(s,"yes")) return 1;
  40     else if (!strcasecmp(s,"no")) return 0;
  41     else return -1;
  42 }
  43
  44 void appendServerSaveParams(time_t seconds, int changes) {
  45     server.saveparams = zrealloc(server.saveparams,sizeof(struct saveparam)*(server.saveparamslen+1));
  46     server.saveparams[server.saveparamslen].seconds = seconds;
  47     server.saveparams[server.saveparamslen].changes = changes;
  48     server.saveparamslen++;
  49 }
  50
  51 void resetServerSaveParams() {
  52     zfree(server.saveparams);
  53     server.saveparams = NULL;
  54     server.saveparamslen = 0;
  55 }
  56
  57 void loadServerConfigFromString(char *config) {
  58     char *err = NULL;
  59     int linenum = 0, totlines, i;
  60     sds *lines;
  61
  62     lines = sdssplitlen(config,strlen(config),"\n",1,&totlines);
  63
  64     for (i = 0; i < totlines; i++) {
  65         sds *argv;
  66         int argc;
  67
  68         linenum = i+1;
  69         lines[i] = sdstrim(lines[i]," \t\r\n");
  70
  71         /* Skip comments and blank lines*/
  72         if (lines[i][0] == '#' || lines[i][0] == '\0') continue;
  73
  74         /* Split into arguments */
  75         argv = sdssplitargs(lines[i],&argc);
  76         sdstolower(argv[0]);
  77
  78         /* Execute config directives */
  79         if (!strcasecmp(argv[0],"timeout") && argc == 2) {
  80             server.maxidletime = atoi(argv[1]);
  81             if (server.maxidletime < 0) {
  82                 err = "Invalid timeout value"; goto loaderr;
  83             }
  84         } else if (!strcasecmp(argv[0],"port") && argc == 2) {
  85             server.port = atoi(argv[1]);
  86             if (server.port < 0 || server.port > 65535) {
  87                 err = "Invalid port"; goto loaderr;
  88             }
  89         } else if (!strcasecmp(argv[0],"bind") && argc == 2) {
  90             server.bindaddr = zstrdup(argv[1]);
  91         } else if (!strcasecmp(argv[0],"unixsocket") && argc == 2) {
  92             server.unixsocket = zstrdup(argv[1]);
  93         } else if (!strcasecmp(argv[0],"unixsocketperm") && argc == 2) {
  94             errno = 0;
  95             server.unixsocketperm = (mode_t)strtol(argv[1], NULL, 8);
  96             if (errno || server.unixsocketperm > 0777) {
  97                 err = "Invalid socket file permissions"; goto loaderr;
  98             }
  99         } else if (!strcasecmp(argv[0],"save")) {
 100             if (argc == 3) {
 101                 int seconds = atoi(argv[1]);
 102                 int changes = atoi(argv[2]);
 103                 if (seconds < 1 || changes < 0) {
 104                     err = "Invalid save parameters"; goto loaderr;
 105                 }
 106                 appendServerSaveParams(seconds,changes);
 107             } else if (argc == 2 && !strcasecmp(argv[1],"")) {
 108                 resetServerSaveParams();
 109             }
 110         } else if (!strcasecmp(argv[0],"dir") && argc == 2) {
 111             if (chdir(argv[1]) == -1) {
 112                 redisLog(REDIS_WARNING,"Can't chdir to '%s': %s",
 113                     argv[1], strerror(errno));
 114                 exit(1);
 115             }
 116         } else if (!strcasecmp(argv[0],"loglevel") && argc == 2) {
 117             if (!strcasecmp(argv[1],"debug")) server.verbosity = REDIS_DEBUG;
 118             else if (!strcasecmp(argv[1],"verbose")) server.verbosity = REDIS_VERBOSE;
 119             else if (!strcasecmp(argv[1],"notice")) server.verbosity = REDIS_NOTICE;
 120             else if (!strcasecmp(argv[1],"warning")) server.verbosity = REDIS_WARNING;
 121             else {
 122                 err = "Invalid log level. Must be one of debug, notice, warning";
 123                 goto loaderr;
 124             }
 125         } else if (!strcasecmp(argv[0],"logfile") && argc == 2) {
 126             FILE *logfp;
 127
 128             server.logfile = zstrdup(argv[1]);
 129             if (!strcasecmp(server.logfile,"stdout")) {
 130                 zfree(server.logfile);
 131                 server.logfile = NULL;
 132             }
 133             if (server.logfile) {
 134                 /* Test if we are able to open the file. The server will not
 135                  * be able to abort just for this problem later... */
 136                 logfp = fopen(server.logfile,"a");
 137                 if (logfp == NULL) {
 138                     err = sdscatprintf(sdsempty(),
 139                         "Can't open the log file: %s", strerror(errno));
 140                     goto loaderr;
 141                 }
 142                 fclose(logfp);
 143             }
 144         } else if (!strcasecmp(argv[0],"syslog-enabled") && argc == 2) {
 145             if ((server.syslog_enabled = yesnotoi(argv[1])) == -1) {
 146                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 147             }
 148         } else if (!strcasecmp(argv[0],"syslog-ident") && argc == 2) {
 149             if (server.syslog_ident) zfree(server.syslog_ident);
 150             server.syslog_ident = zstrdup(argv[1]);
 151         } else if (!strcasecmp(argv[0],"syslog-facility") && argc == 2) {
 152             struct {
 153                 const char     *name;
 154                 const int       value;
 155             } validSyslogFacilities[] = {
 156                 {"user",    LOG_USER},
 157                 {"local0",  LOG_LOCAL0},
 158                 {"local1",  LOG_LOCAL1},
 159                 {"local2",  LOG_LOCAL2},
 160                 {"local3",  LOG_LOCAL3},
 161                 {"local4",  LOG_LOCAL4},
 162                 {"local5",  LOG_LOCAL5},
 163                 {"local6",  LOG_LOCAL6},
 164                 {"local7",  LOG_LOCAL7},
 165                 {NULL, 0}
 166             };
 167             int i;
 168
 169             for (i = 0; validSyslogFacilities[i].name; i++) {
 170                 if (!strcasecmp(validSyslogFacilities[i].name, argv[1])) {
 171                     server.syslog_facility = validSyslogFacilities[i].value;
 172                     break;
 173                 }
 174             }
 175
 176             if (!validSyslogFacilities[i].name) {
 177                 err = "Invalid log facility. Must be one of USER or between LOCAL0-LOCAL7";
 178                 goto loaderr;
 179             }
 180         } else if (!strcasecmp(argv[0],"databases") && argc == 2) {
 181             server.dbnum = atoi(argv[1]);
 182             if (server.dbnum < 1) {
 183                 err = "Invalid number of databases"; goto loaderr;
 184             }
 185         } else if (!strcasecmp(argv[0],"include") && argc == 2) {
 186             loadServerConfig(argv[1],NULL);
 187         } else if (!strcasecmp(argv[0],"maxclients") && argc == 2) {
 188             server.maxclients = atoi(argv[1]);
 189             if (server.maxclients < 1) {
 190                 err = "Invalid max clients limit"; goto loaderr;
 191             }
 192         } else if (!strcasecmp(argv[0],"maxmemory") && argc == 2) {
 193             server.maxmemory = memtoll(argv[1],NULL);
 194         } else if (!strcasecmp(argv[0],"maxmemory-policy") && argc == 2) {
 195             if (!strcasecmp(argv[1],"volatile-lru")) {
 196                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 197             } else if (!strcasecmp(argv[1],"volatile-random")) {
 198                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 199             } else if (!strcasecmp(argv[1],"volatile-ttl")) {
 200                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 201             } else if (!strcasecmp(argv[1],"allkeys-lru")) {
 202                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 203             } else if (!strcasecmp(argv[1],"allkeys-random")) {
 204                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 205             } else if (!strcasecmp(argv[1],"noeviction")) {
 206                 server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 207             } else {
 208                 err = "Invalid maxmemory policy";
 209                 goto loaderr;
 210             }
 211         } else if (!strcasecmp(argv[0],"maxmemory-samples") && argc == 2) {
 212             server.maxmemory_samples = atoi(argv[1]);
 213             if (server.maxmemory_samples <= 0) {
 214                 err = "maxmemory-samples must be 1 or greater";
 215                 goto loaderr;
 216             }
 217         } else if (!strcasecmp(argv[0],"slaveof") && argc == 3) {
 218             server.masterhost = sdsnew(argv[1]);
 219             server.masterport = atoi(argv[2]);
 220             server.repl_state = REDIS_REPL_CONNECT;
 221         } else if (!strcasecmp(argv[0],"repl-ping-slave-period") && argc == 2) {
 222             server.repl_ping_slave_period = atoi(argv[1]);
 223             if (server.repl_ping_slave_period <= 0) {
 224                 err = "repl-ping-slave-period must be 1 or greater";
 225                 goto loaderr;
 226             }
 227         } else if (!strcasecmp(argv[0],"repl-timeout") && argc == 2) {
 228             server.repl_timeout = atoi(argv[1]);
 229             if (server.repl_timeout <= 0) {
 230                 err = "repl-timeout must be 1 or greater";
 231                 goto loaderr;
 232             }
 233         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
 234                 server.masterauth = zstrdup(argv[1]);
 235         } else if (!strcasecmp(argv[0],"slave-serve-stale-data") && argc == 2) {
 236             if ((server.repl_serve_stale_data = yesnotoi(argv[1])) == -1) {
 237                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 238             }
 239         } else if (!strcasecmp(argv[0],"slave-read-only") && argc == 2) {
 240             if ((server.repl_slave_ro = yesnotoi(argv[1])) == -1) {
 241                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 242             }
 243         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 244             if ((server.rdb_compression = yesnotoi(argv[1])) == -1) {
 245                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 246             }
 247         } else if (!strcasecmp(argv[0],"rdbchecksum") && argc == 2) {
 248             if ((server.rdb_checksum = yesnotoi(argv[1])) == -1) {
 249                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 250             }
 251         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 252             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 253                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 254             }
 255         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 256             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 257                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 258             }
 259         } else if (!strcasecmp(argv[0],"keyarchive") && argc == 2) {
 260             int yes;
 261
 262             if ((yes = yesnotoi(argv[1])) == -1) {
 263                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 264             }
 265             server.mdb_state = yes ? REDIS_MDB_ON : REDIS_MDB_OFF;
 266         } else if (!strcasecmp(argv[0],"mdb-environment") && argc == 2) {
 267             zfree(server.mdb_environment);
 268             server.mdb_environment = zstrdup(argv[1]);
 269         } else if (!strcasecmp(argv[0],"mdb-mapsize") && argc == 2) {
 270             server.mdb_mapsize = memtoll(argv[1], NULL);
 271         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 272             int yes;
 273
 274             if ((yes = yesnotoi(argv[1])) == -1) {
 275                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 276             }
 277             server.aof_state = yes ? REDIS_AOF_ON : REDIS_AOF_OFF;
 278         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 279             zfree(server.aof_filename);
 280             server.aof_filename = zstrdup(argv[1]);
 281         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 282                    && argc == 2) {
 283             if ((server.aof_no_fsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 284                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 285             }
 286         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 287             if (!strcasecmp(argv[1],"no")) {
 288                 server.aof_fsync = AOF_FSYNC_NO;
 289             } else if (!strcasecmp(argv[1],"always")) {
 290                 server.aof_fsync = AOF_FSYNC_ALWAYS;
 291             } else if (!strcasecmp(argv[1],"everysec")) {
 292                 server.aof_fsync = AOF_FSYNC_EVERYSEC;
 293             } else {
 294                 err = "argument must be 'no', 'always' or 'everysec'";
 295                 goto loaderr;
 296             }
 297         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-percentage") &&
 298                    argc == 2)
 299         {
 300             server.aof_rewrite_perc = atoi(argv[1]);
 301             if (server.aof_rewrite_perc < 0) {
 302                 err = "Invalid negative percentage for AOF auto rewrite";
 303                 goto loaderr;
 304             }
 305         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-min-size") &&
 306                    argc == 2)
 307         {
 308             server.aof_rewrite_min_size = memtoll(argv[1],NULL);
 309         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 310             if (strlen(argv[1]) > REDIS_AUTHPASS_MAX_LEN) {
 311                 err = "Password is longer than REDIS_AUTHPASS_MAX_LEN";
 312                 goto loaderr;
 313             }
 314             server.requirepass = zstrdup(argv[1]);
 315         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 316             zfree(server.pidfile);
 317             server.pidfile = zstrdup(argv[1]);
 318         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 319             zfree(server.rdb_filename);
 320             server.rdb_filename = zstrdup(argv[1]);
 321         } else if (!strcasecmp(argv[0],"hash-max-ziplist-entries") && argc == 2) {
 322             server.hash_max_ziplist_entries = memtoll(argv[1], NULL);
 323         } else if (!strcasecmp(argv[0],"hash-max-ziplist-value") && argc == 2) {
 324             server.hash_max_ziplist_value = memtoll(argv[1], NULL);
 325         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 326             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 327         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
 328             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 329         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2) {
 330             server.set_max_intset_entries = memtoll(argv[1], NULL);
 331         } else if (!strcasecmp(argv[0],"zset-max-ziplist-entries") && argc == 2) {
 332             server.zset_max_ziplist_entries = memtoll(argv[1], NULL);
 333         } else if (!strcasecmp(argv[0],"zset-max-ziplist-value") && argc == 2) {
 334             server.zset_max_ziplist_value = memtoll(argv[1], NULL);
 335         } else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
 336             struct redisCommand *cmd = lookupCommand(argv[1]);
 337             int retval;
 338
 339             if (!cmd) {
 340                 err = "No such command in rename-command";
 341                 goto loaderr;
 342             }
 343
 344             /* If the target command name is the emtpy string we just
 345              * remove it from the command table. */
 346             retval = dictDelete(server.commands, argv[1]);
 347             redisAssert(retval == DICT_OK);
 348
 349             /* Otherwise we re-add the command under a different name. */
 350             if (sdslen(argv[2]) != 0) {
 351                 sds copy = sdsdup(argv[2]);
 352
 353                 retval = dictAdd(server.commands, copy, cmd);
 354                 if (retval != DICT_OK) {
 355                     sdsfree(copy);
 356                     err = "Target command name already exists"; goto loaderr;
 357                 }
 358             }
 359         } else if (!strcasecmp(argv[0],"lua-time-limit") && argc == 2) {
 360             server.lua_time_limit = strtoll(argv[1],NULL,10);
 361         } else if (!strcasecmp(argv[0],"slowlog-log-slower-than") &&
 362                    argc == 2)
 363         {
 364             server.slowlog_log_slower_than = strtoll(argv[1],NULL,10);
 365         } else if (!strcasecmp(argv[0],"slowlog-max-len") && argc == 2) {
 366             server.slowlog_max_len = strtoll(argv[1],NULL,10);
 367         } else if (!strcasecmp(argv[0],"client-output-buffer-limit") &&
 368                    argc == 5)
 369         {
 370             int class = getClientLimitClassByName(argv[1]);
 371             unsigned long long hard, soft;
 372             int soft_seconds;
 373
 374             if (class == -1) {
 375                 err = "Unrecognized client limit class";
 376                 goto loaderr;
 377             }
 378             hard = memtoll(argv[2],NULL);
 379             soft = memtoll(argv[3],NULL);
 380             soft_seconds = atoi(argv[4]);
 381             if (soft_seconds < 0) {
 382                 err = "Negative number of seconds in soft limt is invalid";
 383                 goto loaderr;
 384             }
 385             server.client_obuf_limits[class].hard_limit_bytes = hard;
 386             server.client_obuf_limits[class].soft_limit_bytes = soft;
 387             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 388         } else if (!strcasecmp(argv[0],"stop-writes-on-bgsave-error") &&
 389                    argc == 2) {
 390             if ((server.stop_writes_on_bgsave_err = yesnotoi(argv[1])) == -1) {
 391                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 392             }
 393         } else if (!strcasecmp(argv[0],"slave-priority") && argc == 2) {
 394             server.slave_priority = atoi(argv[1]);
 395         } else if (!strcasecmp(argv[0],"sentinel")) {
 396             /* argc == 1 is handled by main() as we need to enter the sentinel
 397              * mode ASAP. */
 398             if (argc != 1) {
 399                 if (!server.sentinel_mode) {
 400                     err = "sentinel directive while not in sentinel mode";
 401                     goto loaderr;
 402                 }
 403                 err = sentinelHandleConfiguration(argv+1,argc-1);
 404                 if (err) goto loaderr;
 405             }
 406         } else {
 407             err = "Bad directive or wrong number of arguments"; goto loaderr;
 408         }
 409         sdsfreesplitres(argv,argc);
 410     }
 411     sdsfreesplitres(lines,totlines);
 412     return;
 413
 414 loaderr:
 415     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 416     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 417     fprintf(stderr, ">>> '%s'\n", lines[i]);
 418     fprintf(stderr, "%s\n", err);
 419     exit(1);
 420 }
 421
 422 /* Load the server configuration from the specified filename.
 423  * The function appends the additional configuration directives stored
 424  * in the 'options' string to the config file before loading.
 425  *
 426  * Both filename and options can be NULL, in such a case are considered
 427  * emtpy. This way loadServerConfig can be used to just load a file or
 428  * just load a string. */
 429 void loadServerConfig(char *filename, char *options) {
 430     sds config = sdsempty();
 431     char buf[REDIS_CONFIGLINE_MAX+1];
 432
 433     /* Load the file content */
 434     if (filename) {
 435         FILE *fp;
 436
 437         if (filename[0] == '-' && filename[1] == '\0') {
 438             fp = stdin;
 439         } else {
 440             if ((fp = fopen(filename,"r")) == NULL) {
 441                 redisLog(REDIS_WARNING,
 442                     "Fatal error, can't open config file '%s'", filename);
 443                 exit(1);
 444             }
 445         }
 446         while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL)
 447             config = sdscat(config,buf);
 448         if (fp != stdin) fclose(fp);
 449     }
 450     /* Append the additional options */
 451     if (options) {
 452         config = sdscat(config,"\n");
 453         config = sdscat(config,options);
 454     }
 455     loadServerConfigFromString(config);
 456     sdsfree(config);
 457 }
 458
 459 /*-----------------------------------------------------------------------------
 460  * CONFIG command for remote configuration
 461  *----------------------------------------------------------------------------*/
 462
 463 void configSetCommand(redisClient *c) {
 464     robj *o;
 465     long long ll;
 466     redisAssertWithInfo(c,c->argv[2],c->argv[2]->encoding == REDIS_ENCODING_RAW);
 467     redisAssertWithInfo(c,c->argv[2],c->argv[3]->encoding == REDIS_ENCODING_RAW);
 468     o = c->argv[3];
 469
 470     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 471         zfree(server.rdb_filename);
 472         server.rdb_filename = zstrdup(o->ptr);
 473     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 474         if (sdslen(o->ptr) > REDIS_AUTHPASS_MAX_LEN) goto badfmt;
 475         zfree(server.requirepass);
 476         server.requirepass = ((char*)o->ptr)[0] ? zstrdup(o->ptr) : NULL;
 477     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 478         zfree(server.masterauth);
 479         server.masterauth = zstrdup(o->ptr);
 480     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 481         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 482             ll < 0) goto badfmt;
 483         server.maxmemory = ll;
 484         if (server.maxmemory) {
 485             if (server.maxmemory < zmalloc_used_memory()) {
 486                 redisLog(REDIS_WARNING,"WARNING: the new maxmemory value set via CONFIG SET is smaller than the current memory usage. This will result in keys eviction and/or inability to accept new write commands depending on the maxmemory-policy.");
 487             }
 488             freeMemoryIfNeeded();
 489         }
 490     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 491         if (!strcasecmp(o->ptr,"volatile-lru")) {
 492             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 493         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 494             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 495         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 496             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 497         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 498             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 499         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 500             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 501         } else if (!strcasecmp(o->ptr,"noeviction")) {
 502             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 503         } else {
 504             goto badfmt;
 505         }
 506     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 507         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 508             ll <= 0) goto badfmt;
 509         server.maxmemory_samples = ll;
 510     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 511         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 512             ll < 0 || ll > LONG_MAX) goto badfmt;
 513         server.maxidletime = ll;
 514     } else if (!strcasecmp(c->argv[2]->ptr,"keyarchive")) {
 515         int enable = yesnotoi(o->ptr);
 516
 517         if (enable == -1) goto badfmt;
 518         if (enable == 0 && server.mdb_state != REDIS_MDB_OFF) {
 519             stopKeyArchive();
 520         } else if (enable && server.mdb_state == REDIS_MDB_OFF) {
 521             if (startKeyArchive() != 0) {
 522                 addReplyError(c,
 523                     "Unable to turn on MDB. Check server logs.");
 524                 return;
 525             }
 526         }
 527     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 528         if (!strcasecmp(o->ptr,"no")) {
 529             server.aof_fsync = AOF_FSYNC_NO;
 530         } else if (!strcasecmp(o->ptr,"everysec")) {
 531             server.aof_fsync = AOF_FSYNC_EVERYSEC;
 532         } else if (!strcasecmp(o->ptr,"always")) {
 533             server.aof_fsync = AOF_FSYNC_ALWAYS;
 534         } else {
 535             goto badfmt;
 536         }
 537     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 538         int yn = yesnotoi(o->ptr);
 539
 540         if (yn == -1) goto badfmt;
 541         server.aof_no_fsync_on_rewrite = yn;
 542     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 543         int enable = yesnotoi(o->ptr);
 544
 545         if (enable == -1) goto badfmt;
 546         if (enable == 0 && server.aof_state != REDIS_AOF_OFF) {
 547             stopAppendOnly();
 548         } else if (enable && server.aof_state == REDIS_AOF_OFF) {
 549             if (startAppendOnly() == REDIS_ERR) {
 550                 addReplyError(c,
 551                     "Unable to turn on AOF. Check server logs.");
 552                 return;
 553             }
 554         }
 555     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-percentage")) {
 556         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 557         server.aof_rewrite_perc = ll;
 558     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-min-size")) {
 559         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 560         server.aof_rewrite_min_size = ll;
 561     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 562         int vlen, j;
 563         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 564
 565         /* Perform sanity check before setting the new config:
 566          * - Even number of args
 567          * - Seconds >= 1, changes >= 0 */
 568         if (vlen & 1) {
 569             sdsfreesplitres(v,vlen);
 570             goto badfmt;
 571         }
 572         for (j = 0; j < vlen; j++) {
 573             char *eptr;
 574             long val;
 575
 576             val = strtoll(v[j], &eptr, 10);
 577             if (eptr[0] != '\0' ||
 578                 ((j & 1) == 0 && val < 1) ||
 579                 ((j & 1) == 1 && val < 0)) {
 580                 sdsfreesplitres(v,vlen);
 581                 goto badfmt;
 582             }
 583         }
 584         /* Finally set the new config */
 585         resetServerSaveParams();
 586         for (j = 0; j < vlen; j += 2) {
 587             time_t seconds;
 588             int changes;
 589
 590             seconds = strtoll(v[j],NULL,10);
 591             changes = strtoll(v[j+1],NULL,10);
 592             appendServerSaveParams(seconds, changes);
 593         }
 594         sdsfreesplitres(v,vlen);
 595     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 596         int yn = yesnotoi(o->ptr);
 597
 598         if (yn == -1) goto badfmt;
 599         server.repl_serve_stale_data = yn;
 600     } else if (!strcasecmp(c->argv[2]->ptr,"slave-read-only")) {
 601         int yn = yesnotoi(o->ptr);
 602
 603         if (yn == -1) goto badfmt;
 604         server.repl_slave_ro = yn;
 605     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 606         if (chdir((char*)o->ptr) == -1) {
 607             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 608             return;
 609         }
 610     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-entries")) {
 611         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 612         server.hash_max_ziplist_entries = ll;
 613     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-value")) {
 614         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 615         server.hash_max_ziplist_value = ll;
 616     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 617         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 618         server.list_max_ziplist_entries = ll;
 619     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 620         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 621         server.list_max_ziplist_value = ll;
 622     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 623         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 624         server.set_max_intset_entries = ll;
 625     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 626         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 627         server.zset_max_ziplist_entries = ll;
 628     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 629         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 630         server.zset_max_ziplist_value = ll;
 631     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
 632         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 633         server.lua_time_limit = ll;
 634     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-log-slower-than")) {
 635         if (getLongLongFromObject(o,&ll) == REDIS_ERR) goto badfmt;
 636         server.slowlog_log_slower_than = ll;
 637     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-max-len")) {
 638         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 639         server.slowlog_max_len = (unsigned)ll;
 640     } else if (!strcasecmp(c->argv[2]->ptr,"loglevel")) {
 641         if (!strcasecmp(o->ptr,"warning")) {
 642             server.verbosity = REDIS_WARNING;
 643         } else if (!strcasecmp(o->ptr,"notice")) {
 644             server.verbosity = REDIS_NOTICE;
 645         } else if (!strcasecmp(o->ptr,"verbose")) {
 646             server.verbosity = REDIS_VERBOSE;
 647         } else if (!strcasecmp(o->ptr,"debug")) {
 648             server.verbosity = REDIS_DEBUG;
 649         } else {
 650             goto badfmt;
 651         }
 652     } else if (!strcasecmp(c->argv[2]->ptr,"client-output-buffer-limit")) {
 653         int vlen, j;
 654         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 655
 656         /* We need a multiple of 4: <class> <hard> <soft> <soft_seconds> */
 657         if (vlen % 4) {
 658             sdsfreesplitres(v,vlen);
 659             goto badfmt;
 660         }
 661
 662         /* Sanity check of single arguments, so that we either refuse the
 663          * whole configuration string or accept it all, even if a single
 664          * error in a single client class is present. */
 665         for (j = 0; j < vlen; j++) {
 666             char *eptr;
 667             long val;
 668
 669             if ((j % 4) == 0) {
 670                 if (getClientLimitClassByName(v[j]) == -1) {
 671                     sdsfreesplitres(v,vlen);
 672                     goto badfmt;
 673                 }
 674             } else {
 675                 val = strtoll(v[j], &eptr, 10);
 676                 if (eptr[0] != '\0' || val < 0) {
 677                     sdsfreesplitres(v,vlen);
 678                     goto badfmt;
 679                 }
 680             }
 681         }
 682         /* Finally set the new config */
 683         for (j = 0; j < vlen; j += 4) {
 684             int class;
 685             unsigned long long hard, soft;
 686             int soft_seconds;
 687
 688             class = getClientLimitClassByName(v[j]);
 689             hard = strtoll(v[j+1],NULL,10);
 690             soft = strtoll(v[j+2],NULL,10);
 691             soft_seconds = strtoll(v[j+3],NULL,10);
 692
 693             server.client_obuf_limits[class].hard_limit_bytes = hard;
 694             server.client_obuf_limits[class].soft_limit_bytes = soft;
 695             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 696         }
 697         sdsfreesplitres(v,vlen);
 698     } else if (!strcasecmp(c->argv[2]->ptr,"stop-writes-on-bgsave-error")) {
 699         int yn = yesnotoi(o->ptr);
 700
 701         if (yn == -1) goto badfmt;
 702         server.stop_writes_on_bgsave_err = yn;
 703     } else if (!strcasecmp(c->argv[2]->ptr,"repl-ping-slave-period")) {
 704         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 705         server.repl_ping_slave_period = ll;
 706     } else if (!strcasecmp(c->argv[2]->ptr,"repl-timeout")) {
 707         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 708         server.repl_timeout = ll;
 709     } else if (!strcasecmp(c->argv[2]->ptr,"watchdog-period")) {
 710         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 711         if (ll)
 712             enableWatchdog(ll);
 713         else
 714             disableWatchdog();
 715     } else if (!strcasecmp(c->argv[2]->ptr,"rdbcompression")) {
 716         int yn = yesnotoi(o->ptr);
 717
 718         if (yn == -1) goto badfmt;
 719         server.rdb_compression = yn;
 720     } else if (!strcasecmp(c->argv[2]->ptr,"rdbchecksum")) {
 721         int yn = yesnotoi(o->ptr);
 722
 723         if (yn == -1) goto badfmt;
 724         server.rdb_checksum = yn;
 725     } else if (!strcasecmp(c->argv[2]->ptr,"slave-priority")) {
 726         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 727             ll <= 0) goto badfmt;
 728         server.slave_priority = ll;
 729     } else {
 730         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 731             (char*)c->argv[2]->ptr);
 732         return;
 733     }
 734     addReply(c,shared.ok);
 735     return;
 736
 737 badfmt: /* Bad format errors */
 738     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 739             (char*)o->ptr,
 740             (char*)c->argv[2]->ptr);
 741 }
 742
 743 #define config_get_string_field(_name,_var) do { \
 744     if (stringmatch(pattern,_name,0)) { \
 745         addReplyBulkCString(c,_name); \
 746         addReplyBulkCString(c,_var ? _var : ""); \
 747         matches++; \
 748     } \
 749 } while(0);
 750
 751 #define config_get_bool_field(_name,_var) do { \
 752     if (stringmatch(pattern,_name,0)) { \
 753         addReplyBulkCString(c,_name); \
 754         addReplyBulkCString(c,_var ? "yes" : "no"); \
 755         matches++; \
 756     } \
 757 } while(0);
 758
 759 #define config_get_numerical_field(_name,_var) do { \
 760     if (stringmatch(pattern,_name,0)) { \
 761         ll2string(buf,sizeof(buf),_var); \
 762         addReplyBulkCString(c,_name); \
 763         addReplyBulkCString(c,buf); \
 764         matches++; \
 765     } \
 766 } while(0);
 767
 768 void configGetCommand(redisClient *c) {
 769     robj *o = c->argv[2];
 770     void *replylen = addDeferredMultiBulkLength(c);
 771     char *pattern = o->ptr;
 772     char buf[128];
 773     int matches = 0;
 774     redisAssertWithInfo(c,o,o->encoding == REDIS_ENCODING_RAW);
 775
 776     /* String values */
 777     config_get_string_field("dbfilename",server.rdb_filename);
 778     config_get_string_field("requirepass",server.requirepass);
 779     config_get_string_field("masterauth",server.requirepass);
 780     config_get_string_field("bind",server.bindaddr);
 781     config_get_string_field("unixsocket",server.unixsocket);
 782     config_get_string_field("logfile",server.logfile);
 783     config_get_string_field("pidfile",server.pidfile);
 784
 785     /* Numerical values */
 786     config_get_numerical_field("maxmemory",server.maxmemory);
 787     config_get_numerical_field("maxmemory-samples",server.maxmemory_samples);
 788     config_get_numerical_field("timeout",server.maxidletime);
 789     config_get_numerical_field("auto-aof-rewrite-percentage",
 790             server.aof_rewrite_perc);
 791     config_get_numerical_field("auto-aof-rewrite-min-size",
 792             server.aof_rewrite_min_size);
 793     config_get_numerical_field("hash-max-ziplist-entries",
 794             server.hash_max_ziplist_entries);
 795     config_get_numerical_field("hash-max-ziplist-value",
 796             server.hash_max_ziplist_value);
 797     config_get_numerical_field("list-max-ziplist-entries",
 798             server.list_max_ziplist_entries);
 799     config_get_numerical_field("list-max-ziplist-value",
 800             server.list_max_ziplist_value);
 801     config_get_numerical_field("set-max-intset-entries",
 802             server.set_max_intset_entries);
 803     config_get_numerical_field("zset-max-ziplist-entries",
 804             server.zset_max_ziplist_entries);
 805     config_get_numerical_field("zset-max-ziplist-value",
 806             server.zset_max_ziplist_value);
 807     config_get_numerical_field("lua-time-limit",server.lua_time_limit);
 808     config_get_numerical_field("slowlog-log-slower-than",
 809             server.slowlog_log_slower_than);
 810     config_get_numerical_field("slowlog-max-len",
 811             server.slowlog_max_len);
 812     config_get_numerical_field("port",server.port);
 813     config_get_numerical_field("databases",server.dbnum);
 814     config_get_numerical_field("repl-ping-slave-period",server.repl_ping_slave_period);
 815     config_get_numerical_field("repl-timeout",server.repl_timeout);
 816     config_get_numerical_field("maxclients",server.maxclients);
 817     config_get_numerical_field("watchdog-period",server.watchdog_period);
 818     config_get_numerical_field("slave-priority",server.slave_priority);
 819
 820     /* Bool (yes/no) values */
 821     config_get_bool_field("no-appendfsync-on-rewrite",
 822             server.aof_no_fsync_on_rewrite);
 823     config_get_bool_field("slave-serve-stale-data",
 824             server.repl_serve_stale_data);
 825     config_get_bool_field("slave-read-only",
 826             server.repl_slave_ro);
 827     config_get_bool_field("stop-writes-on-bgsave-error",
 828             server.stop_writes_on_bgsave_err);
 829     config_get_bool_field("daemonize", server.daemonize);
 830     config_get_bool_field("rdbcompression", server.rdb_compression);
 831     config_get_bool_field("rdbchecksum", server.rdb_checksum);
 832     config_get_bool_field("activerehashing", server.activerehashing);
 833
 834     /* Everything we can't handle with macros follows. */
 835
 836     if (stringmatch(pattern,"appendonly",0)) {
 837         addReplyBulkCString(c,"appendonly");
 838         addReplyBulkCString(c,server.aof_state == REDIS_AOF_OFF ? "no" : "yes");
 839         matches++;
 840     }
 841     if (stringmatch(pattern,"dir",0)) {
 842         char buf[1024];
 843
 844         if (getcwd(buf,sizeof(buf)) == NULL)
 845             buf[0] = '\0';
 846
 847         addReplyBulkCString(c,"dir");
 848         addReplyBulkCString(c,buf);
 849         matches++;
 850     }
 851     if (stringmatch(pattern,"maxmemory-policy",0)) {
 852         char *s;
 853
 854         switch(server.maxmemory_policy) {
 855         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 856         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 857         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 858         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 859         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 860         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 861         default: s = "unknown"; break; /* too harmless to panic */
 862         }
 863         addReplyBulkCString(c,"maxmemory-policy");
 864         addReplyBulkCString(c,s);
 865         matches++;
 866     }
 867     if (stringmatch(pattern,"appendfsync",0)) {
 868         char *policy;
 869
 870         switch(server.aof_fsync) {
 871         case AOF_FSYNC_NO: policy = "no"; break;
 872         case AOF_FSYNC_EVERYSEC: policy = "everysec"; break;
 873         case AOF_FSYNC_ALWAYS: policy = "always"; break;
 874         default: policy = "unknown"; break; /* too harmless to panic */
 875         }
 876         addReplyBulkCString(c,"appendfsync");
 877         addReplyBulkCString(c,policy);
 878         matches++;
 879     }
 880     if (stringmatch(pattern,"save",0)) {
 881         sds buf = sdsempty();
 882         int j;
 883
 884         for (j = 0; j < server.saveparamslen; j++) {
 885             buf = sdscatprintf(buf,"%ld %d",
 886                     server.saveparams[j].seconds,
 887                     server.saveparams[j].changes);
 888             if (j != server.saveparamslen-1)
 889                 buf = sdscatlen(buf," ",1);
 890         }
 891         addReplyBulkCString(c,"save");
 892         addReplyBulkCString(c,buf);
 893         sdsfree(buf);
 894         matches++;
 895     }
 896     if (stringmatch(pattern,"loglevel",0)) {
 897         char *s;
 898
 899         switch(server.verbosity) {
 900         case REDIS_WARNING: s = "warning"; break;
 901         case REDIS_VERBOSE: s = "verbose"; break;
 902         case REDIS_NOTICE: s = "notice"; break;
 903         case REDIS_DEBUG: s = "debug"; break;
 904         default: s = "unknown"; break; /* too harmless to panic */
 905         }
 906         addReplyBulkCString(c,"loglevel");
 907         addReplyBulkCString(c,s);
 908         matches++;
 909     }
 910     if (stringmatch(pattern,"client-output-buffer-limit",0)) {
 911         sds buf = sdsempty();
 912         int j;
 913
 914         for (j = 0; j < REDIS_CLIENT_LIMIT_NUM_CLASSES; j++) {
 915             buf = sdscatprintf(buf,"%s %llu %llu %ld",
 916                     getClientLimitClassName(j),
 917                     server.client_obuf_limits[j].hard_limit_bytes,
 918                     server.client_obuf_limits[j].soft_limit_bytes,
 919                     (long) server.client_obuf_limits[j].soft_limit_seconds);
 920             if (j != REDIS_CLIENT_LIMIT_NUM_CLASSES-1)
 921                 buf = sdscatlen(buf," ",1);
 922         }
 923         addReplyBulkCString(c,"client-output-buffer-limit");
 924         addReplyBulkCString(c,buf);
 925         sdsfree(buf);
 926         matches++;
 927     }
 928     if (stringmatch(pattern,"unixsocketperm",0)) {
 929         char buf[32];
 930         snprintf(buf,sizeof(buf),"%o",server.unixsocketperm);
 931         addReplyBulkCString(c,"unixsocketperm");
 932         addReplyBulkCString(c,buf);
 933         matches++;
 934     }
 935     if (stringmatch(pattern,"slaveof",0)) {
 936         char buf[256];
 937
 938         addReplyBulkCString(c,"slaveof");
 939         if (server.masterhost)
 940             snprintf(buf,sizeof(buf),"%s %d",
 941                 server.masterhost, server.masterport);
 942         else
 943             buf[0] = '\0';
 944         addReplyBulkCString(c,buf);
 945         matches++;
 946     }
 947     setDeferredMultiBulkLength(c,replylen,matches*2);
 948 }
 949
 950 void configCommand(redisClient *c) {
 951     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 952         if (c->argc != 4) goto badarity;
 953         configSetCommand(c);
 954     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 955         if (c->argc != 3) goto badarity;
 956         configGetCommand(c);
 957     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 958         if (c->argc != 2) goto badarity;
 959         server.stat_keyspace_hits = 0;
 960         server.stat_keyspace_misses = 0;
 961         server.stat_numcommands = 0;
 962         server.stat_numconnections = 0;
 963         server.stat_expiredkeys = 0;
 964         server.stat_rejected_conn = 0;
 965         server.stat_fork_time = 0;
 966         server.aof_delayed_fsync = 0;
 967         resetCommandTableStats();
 968         addReply(c,shared.ok);
 969     } else {
 970         addReplyError(c,
 971             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 972     }
 973     return;
 974
 975 badarity:
 976     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 977         (char*) c->argv[1]->ptr);
 978 }