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 = sdssplitargs(line,&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 < 0 || 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],"unixsocket") && argc == 2) {
  75             server.unixsocket = zstrdup(argv[1]);
  76         } else if (!strcasecmp(argv[0],"save") && argc == 3) {
  77             int seconds = atoi(argv[1]);
  78             int changes = atoi(argv[2]);
  79             if (seconds < 1 || changes < 0) {
  80                 err = "Invalid save parameters"; goto loaderr;
  81             }
  82             appendServerSaveParams(seconds,changes);
  83         } else if (!strcasecmp(argv[0],"dir") && argc == 2) {
  84             if (chdir(argv[1]) == -1) {
  85                 redisLog(REDIS_WARNING,"Can't chdir to '%s': %s",
  86                     argv[1], strerror(errno));
  87                 exit(1);
  88             }
  89         } else if (!strcasecmp(argv[0],"loglevel") && argc == 2) {
  90             if (!strcasecmp(argv[1],"debug")) server.verbosity = REDIS_DEBUG;
  91             else if (!strcasecmp(argv[1],"verbose")) server.verbosity = REDIS_VERBOSE;
  92             else if (!strcasecmp(argv[1],"notice")) server.verbosity = REDIS_NOTICE;
  93             else if (!strcasecmp(argv[1],"warning")) server.verbosity = REDIS_WARNING;
  94             else {
  95                 err = "Invalid log level. Must be one of debug, notice, warning";
  96                 goto loaderr;
  97             }
  98         } else if (!strcasecmp(argv[0],"logfile") && argc == 2) {
  99             FILE *logfp;
 100
 101             server.logfile = zstrdup(argv[1]);
 102             if (!strcasecmp(server.logfile,"stdout")) {
 103                 zfree(server.logfile);
 104                 server.logfile = NULL;
 105             }
 106             if (server.logfile) {
 107                 /* Test if we are able to open the file. The server will not
 108                  * be able to abort just for this problem later... */
 109                 logfp = fopen(server.logfile,"a");
 110                 if (logfp == NULL) {
 111                     err = sdscatprintf(sdsempty(),
 112                         "Can't open the log file: %s", strerror(errno));
 113                     goto loaderr;
 114                 }
 115                 fclose(logfp);
 116             }
 117         } else if (!strcasecmp(argv[0],"syslog-enabled") && argc == 2) {
 118             if ((server.syslog_enabled = yesnotoi(argv[1])) == -1) {
 119                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 120             }
 121         } else if (!strcasecmp(argv[0],"syslog-ident") && argc == 2) {
 122             if (server.syslog_ident) zfree(server.syslog_ident);
 123             server.syslog_ident = zstrdup(argv[1]);
 124         } else if (!strcasecmp(argv[0],"syslog-facility") && argc == 2) {
 125             struct {
 126                 const char     *name;
 127                 const int       value;
 128             } validSyslogFacilities[] = {
 129                 {"user",    LOG_USER},
 130                 {"local0",  LOG_LOCAL0},
 131                 {"local1",  LOG_LOCAL1},
 132                 {"local2",  LOG_LOCAL2},
 133                 {"local3",  LOG_LOCAL3},
 134                 {"local4",  LOG_LOCAL4},
 135                 {"local5",  LOG_LOCAL5},
 136                 {"local6",  LOG_LOCAL6},
 137                 {"local7",  LOG_LOCAL7},
 138                 {NULL, 0}
 139             };
 140             int i;
 141
 142             for (i = 0; validSyslogFacilities[i].name; i++) {
 143                 if (!strcasecmp(validSyslogFacilities[i].name, argv[1])) {
 144                     server.syslog_facility = validSyslogFacilities[i].value;
 145                     break;
 146                 }
 147             }
 148
 149             if (!validSyslogFacilities[i].name) {
 150                 err = "Invalid log facility. Must be one of USER or between LOCAL0-LOCAL7";
 151                 goto loaderr;
 152             }
 153         } else if (!strcasecmp(argv[0],"databases") && argc == 2) {
 154             server.dbnum = atoi(argv[1]);
 155             if (server.dbnum < 1) {
 156                 err = "Invalid number of databases"; goto loaderr;
 157             }
 158         } else if (!strcasecmp(argv[0],"include") && argc == 2) {
 159             loadServerConfig(argv[1]);
 160         } else if (!strcasecmp(argv[0],"maxclients") && argc == 2) {
 161             server.maxclients = atoi(argv[1]);
 162         } else if (!strcasecmp(argv[0],"maxmemory") && argc == 2) {
 163             server.maxmemory = memtoll(argv[1],NULL);
 164         } else if (!strcasecmp(argv[0],"maxmemory-policy") && argc == 2) {
 165             if (!strcasecmp(argv[1],"volatile-lru")) {
 166                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 167             } else if (!strcasecmp(argv[1],"volatile-random")) {
 168                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 169             } else if (!strcasecmp(argv[1],"volatile-ttl")) {
 170                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 171             } else if (!strcasecmp(argv[1],"allkeys-lru")) {
 172                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 173             } else if (!strcasecmp(argv[1],"allkeys-random")) {
 174                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 175             } else if (!strcasecmp(argv[1],"noeviction")) {
 176                 server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 177             } else {
 178                 err = "Invalid maxmemory policy";
 179                 goto loaderr;
 180             }
 181         } else if (!strcasecmp(argv[0],"maxmemory-samples") && argc == 2) {
 182             server.maxmemory_samples = atoi(argv[1]);
 183             if (server.maxmemory_samples <= 0) {
 184                 err = "maxmemory-samples must be 1 or greater";
 185                 goto loaderr;
 186             }
 187         } else if (!strcasecmp(argv[0],"slaveof") && argc == 3) {
 188             server.masterhost = sdsnew(argv[1]);
 189             server.masterport = atoi(argv[2]);
 190             server.replstate = REDIS_REPL_CONNECT;
 191         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
 192                 server.masterauth = zstrdup(argv[1]);
 193         } else if (!strcasecmp(argv[0],"slave-serve-stale-data") && argc == 2) {
 194             if ((server.repl_serve_stale_data = yesnotoi(argv[1])) == -1) {
 195                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 196             }
 197         } else if (!strcasecmp(argv[0],"glueoutputbuf")) {
 198             redisLog(REDIS_WARNING, "Deprecated configuration directive: \"%s\"", argv[0]);
 199         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 200             if ((server.rdbcompression = yesnotoi(argv[1])) == -1) {
 201                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 202             }
 203         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 204             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 205                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 206             }
 207         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 208             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 209                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 210             }
 211         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 212             if ((server.appendonly = yesnotoi(argv[1])) == -1) {
 213                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 214             }
 215         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 216             zfree(server.appendfilename);
 217             server.appendfilename = zstrdup(argv[1]);
 218         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 219                    && argc == 2) {
 220             if ((server.no_appendfsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 221                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 222             }
 223         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 224             if (!strcasecmp(argv[1],"no")) {
 225                 server.appendfsync = APPENDFSYNC_NO;
 226             } else if (!strcasecmp(argv[1],"always")) {
 227                 server.appendfsync = APPENDFSYNC_ALWAYS;
 228             } else if (!strcasecmp(argv[1],"everysec")) {
 229                 server.appendfsync = APPENDFSYNC_EVERYSEC;
 230             } else {
 231                 err = "argument must be 'no', 'always' or 'everysec'";
 232                 goto loaderr;
 233             }
 234         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-percentage") &&
 235                    argc == 2)
 236         {
 237             server.auto_aofrewrite_perc = atoi(argv[1]);
 238             if (server.auto_aofrewrite_perc < 0) {
 239                 err = "Invalid negative percentage for AOF auto rewrite";
 240                 goto loaderr;
 241             }
 242         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-min-size") &&
 243                    argc == 2)
 244         {
 245             server.auto_aofrewrite_min_size = memtoll(argv[1],NULL);
 246         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 247             server.requirepass = zstrdup(argv[1]);
 248         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 249             zfree(server.pidfile);
 250             server.pidfile = zstrdup(argv[1]);
 251         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 252             zfree(server.dbfilename);
 253             server.dbfilename = zstrdup(argv[1]);
 254         } else if (!strcasecmp(argv[0],"diskstore-enabled") && argc == 2) {
 255             if ((server.ds_enabled = yesnotoi(argv[1])) == -1) {
 256                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 257             }
 258         } else if (!strcasecmp(argv[0],"diskstore-path") && argc == 2) {
 259             sdsfree(server.ds_path);
 260             server.ds_path = sdsnew(argv[1]);
 261         } else if (!strcasecmp(argv[0],"cache-max-memory") && argc == 2) {
 262             server.cache_max_memory = memtoll(argv[1],NULL);
 263         } else if (!strcasecmp(argv[0],"cache-flush-delay") && argc == 2) {
 264             server.cache_flush_delay = atoi(argv[1]);
 265             if (server.cache_flush_delay < 0) server.cache_flush_delay = 0;
 266         } else if (!strcasecmp(argv[0],"hash-max-zipmap-entries") && argc == 2) {
 267             server.hash_max_zipmap_entries = memtoll(argv[1], NULL);
 268         } else if (!strcasecmp(argv[0],"hash-max-zipmap-value") && argc == 2) {
 269             server.hash_max_zipmap_value = memtoll(argv[1], NULL);
 270         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 271             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 272         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
 273             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 274         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2) {
 275             server.set_max_intset_entries = memtoll(argv[1], NULL);
 276         } else if (!strcasecmp(argv[0],"zset-max-ziplist-entries") && argc == 2) {
 277             server.zset_max_ziplist_entries = memtoll(argv[1], NULL);
 278         } else if (!strcasecmp(argv[0],"zset-max-ziplist-value") && argc == 2) {
 279             server.zset_max_ziplist_value = memtoll(argv[1], NULL);
 280         } else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
 281             struct redisCommand *cmd = lookupCommand(argv[1]);
 282             int retval;
 283
 284             if (!cmd) {
 285                 err = "No such command in rename-command";
 286                 goto loaderr;
 287             }
 288
 289             /* If the target command name is the emtpy string we just
 290              * remove it from the command table. */
 291             retval = dictDelete(server.commands, argv[1]);
 292             redisAssert(retval == DICT_OK);
 293
 294             /* Otherwise we re-add the command under a different name. */
 295             if (sdslen(argv[2]) != 0) {
 296                 sds copy = sdsdup(argv[2]);
 297
 298                 retval = dictAdd(server.commands, copy, cmd);
 299                 if (retval != DICT_OK) {
 300                     sdsfree(copy);
 301                     err = "Target command name already exists"; goto loaderr;
 302                 }
 303             }
 304         } else if (!strcasecmp(argv[0],"cluster-enabled") && argc == 2) {
 305             if ((server.cluster_enabled = yesnotoi(argv[1])) == -1) {
 306                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 307             }
 308         } else if (!strcasecmp(argv[0],"cluster-config-file") && argc == 2) {
 309             zfree(server.cluster.configfile);
 310             server.cluster.configfile = zstrdup(argv[1]);
 311         } else {
 312             err = "Bad directive or wrong number of arguments"; goto loaderr;
 313         }
 314         for (j = 0; j < argc; j++)
 315             sdsfree(argv[j]);
 316         zfree(argv);
 317         sdsfree(line);
 318     }
 319     if (fp != stdin) fclose(fp);
 320     return;
 321
 322 loaderr:
 323     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 324     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 325     fprintf(stderr, ">>> '%s'\n", line);
 326     fprintf(stderr, "%s\n", err);
 327     exit(1);
 328 }
 329
 330 /*-----------------------------------------------------------------------------
 331  * CONFIG command for remote configuration
 332  *----------------------------------------------------------------------------*/
 333
 334 void configSetCommand(redisClient *c) {
 335     robj *o;
 336     long long ll;
 337     redisAssert(c->argv[2]->encoding == REDIS_ENCODING_RAW);
 338     redisAssert(c->argv[3]->encoding == REDIS_ENCODING_RAW);
 339     o = c->argv[3];
 340
 341     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 342         zfree(server.dbfilename);
 343         server.dbfilename = zstrdup(o->ptr);
 344     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 345         zfree(server.requirepass);
 346         server.requirepass = zstrdup(o->ptr);
 347     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 348         zfree(server.masterauth);
 349         server.masterauth = zstrdup(o->ptr);
 350     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 351         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 352             ll < 0) goto badfmt;
 353         server.maxmemory = ll;
 354         if (server.maxmemory) freeMemoryIfNeeded();
 355     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 356         if (!strcasecmp(o->ptr,"volatile-lru")) {
 357             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 358         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 359             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 360         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 361             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 362         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 363             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 364         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 365             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 366         } else if (!strcasecmp(o->ptr,"noeviction")) {
 367             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 368         } else {
 369             goto badfmt;
 370         }
 371     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 372         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 373             ll <= 0) goto badfmt;
 374         server.maxmemory_samples = ll;
 375     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 376         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 377             ll < 0 || ll > LONG_MAX) goto badfmt;
 378         server.maxidletime = ll;
 379     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 380         if (!strcasecmp(o->ptr,"no")) {
 381             server.appendfsync = APPENDFSYNC_NO;
 382         } else if (!strcasecmp(o->ptr,"everysec")) {
 383             server.appendfsync = APPENDFSYNC_EVERYSEC;
 384         } else if (!strcasecmp(o->ptr,"always")) {
 385             server.appendfsync = APPENDFSYNC_ALWAYS;
 386         } else {
 387             goto badfmt;
 388         }
 389     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 390         int yn = yesnotoi(o->ptr);
 391
 392         if (yn == -1) goto badfmt;
 393         server.no_appendfsync_on_rewrite = yn;
 394     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 395         int old = server.appendonly;
 396         int new = yesnotoi(o->ptr);
 397
 398         if (new == -1) goto badfmt;
 399         if (old != new) {
 400             if (new == 0) {
 401                 stopAppendOnly();
 402             } else {
 403                 if (startAppendOnly() == REDIS_ERR) {
 404                     addReplyError(c,
 405                         "Unable to turn on AOF. Check server logs.");
 406                     return;
 407                 }
 408             }
 409         }
 410     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-percentage")) {
 411         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 412         server.auto_aofrewrite_perc = ll;
 413     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-min-size")) {
 414         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 415         server.auto_aofrewrite_min_size = ll;
 416     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 417         int vlen, j;
 418         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 419
 420         /* Perform sanity check before setting the new config:
 421          * - Even number of args
 422          * - Seconds >= 1, changes >= 0 */
 423         if (vlen & 1) {
 424             sdsfreesplitres(v,vlen);
 425             goto badfmt;
 426         }
 427         for (j = 0; j < vlen; j++) {
 428             char *eptr;
 429             long val;
 430
 431             val = strtoll(v[j], &eptr, 10);
 432             if (eptr[0] != '\0' ||
 433                 ((j & 1) == 0 && val < 1) ||
 434                 ((j & 1) == 1 && val < 0)) {
 435                 sdsfreesplitres(v,vlen);
 436                 goto badfmt;
 437             }
 438         }
 439         /* Finally set the new config */
 440         resetServerSaveParams();
 441         for (j = 0; j < vlen; j += 2) {
 442             time_t seconds;
 443             int changes;
 444
 445             seconds = strtoll(v[j],NULL,10);
 446             changes = strtoll(v[j+1],NULL,10);
 447             appendServerSaveParams(seconds, changes);
 448         }
 449         sdsfreesplitres(v,vlen);
 450     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 451         int yn = yesnotoi(o->ptr);
 452
 453         if (yn == -1) goto badfmt;
 454         server.repl_serve_stale_data = yn;
 455     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 456         if (chdir((char*)o->ptr) == -1) {
 457             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 458             return;
 459         }
 460     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-zipmap-entries")) {
 461         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 462         server.hash_max_zipmap_entries = ll;
 463     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-zipmap-value")) {
 464         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 465         server.hash_max_zipmap_value = ll;
 466     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 467         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 468         server.list_max_ziplist_entries = ll;
 469     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 470         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 471         server.list_max_ziplist_value = ll;
 472     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 473         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 474         server.set_max_intset_entries = ll;
 475     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 476         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 477         server.zset_max_ziplist_entries = ll;
 478     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 479         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 480         server.zset_max_ziplist_value = ll;
 481     } else {
 482         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 483             (char*)c->argv[2]->ptr);
 484         return;
 485     }
 486     addReply(c,shared.ok);
 487     return;
 488
 489 badfmt: /* Bad format errors */
 490     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 491             (char*)o->ptr,
 492             (char*)c->argv[2]->ptr);
 493 }
 494
 495 void configGetCommand(redisClient *c) {
 496     robj *o = c->argv[2];
 497     void *replylen = addDeferredMultiBulkLength(c);
 498     char *pattern = o->ptr;
 499     char buf[128];
 500     int matches = 0;
 501     redisAssert(o->encoding == REDIS_ENCODING_RAW);
 502
 503     if (stringmatch(pattern,"dir",0)) {
 504         char buf[1024];
 505
 506         addReplyBulkCString(c,"dir");
 507         if (getcwd(buf,sizeof(buf)) == NULL) {
 508             buf[0] = '\0';
 509         } else {
 510             addReplyBulkCString(c,buf);
 511         }
 512         matches++;
 513     }
 514     if (stringmatch(pattern,"dbfilename",0)) {
 515         addReplyBulkCString(c,"dbfilename");
 516         addReplyBulkCString(c,server.dbfilename);
 517         matches++;
 518     }
 519     if (stringmatch(pattern,"requirepass",0)) {
 520         addReplyBulkCString(c,"requirepass");
 521         addReplyBulkCString(c,server.requirepass);
 522         matches++;
 523     }
 524     if (stringmatch(pattern,"masterauth",0)) {
 525         addReplyBulkCString(c,"masterauth");
 526         addReplyBulkCString(c,server.masterauth);
 527         matches++;
 528     }
 529     if (stringmatch(pattern,"maxmemory",0)) {
 530         ll2string(buf,sizeof(buf),server.maxmemory);
 531         addReplyBulkCString(c,"maxmemory");
 532         addReplyBulkCString(c,buf);
 533         matches++;
 534     }
 535     if (stringmatch(pattern,"maxmemory-policy",0)) {
 536         char *s;
 537
 538         switch(server.maxmemory_policy) {
 539         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 540         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 541         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 542         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 543         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 544         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 545         default: s = "unknown"; break; /* too harmless to panic */
 546         }
 547         addReplyBulkCString(c,"maxmemory-policy");
 548         addReplyBulkCString(c,s);
 549         matches++;
 550     }
 551     if (stringmatch(pattern,"maxmemory-samples",0)) {
 552         ll2string(buf,sizeof(buf),server.maxmemory_samples);
 553         addReplyBulkCString(c,"maxmemory-samples");
 554         addReplyBulkCString(c,buf);
 555         matches++;
 556     }
 557     if (stringmatch(pattern,"timeout",0)) {
 558         ll2string(buf,sizeof(buf),server.maxidletime);
 559         addReplyBulkCString(c,"timeout");
 560         addReplyBulkCString(c,buf);
 561         matches++;
 562     }
 563     if (stringmatch(pattern,"appendonly",0)) {
 564         addReplyBulkCString(c,"appendonly");
 565         addReplyBulkCString(c,server.appendonly ? "yes" : "no");
 566         matches++;
 567     }
 568     if (stringmatch(pattern,"no-appendfsync-on-rewrite",0)) {
 569         addReplyBulkCString(c,"no-appendfsync-on-rewrite");
 570         addReplyBulkCString(c,server.no_appendfsync_on_rewrite ? "yes" : "no");
 571         matches++;
 572     }
 573     if (stringmatch(pattern,"appendfsync",0)) {
 574         char *policy;
 575
 576         switch(server.appendfsync) {
 577         case APPENDFSYNC_NO: policy = "no"; break;
 578         case APPENDFSYNC_EVERYSEC: policy = "everysec"; break;
 579         case APPENDFSYNC_ALWAYS: policy = "always"; break;
 580         default: policy = "unknown"; break; /* too harmless to panic */
 581         }
 582         addReplyBulkCString(c,"appendfsync");
 583         addReplyBulkCString(c,policy);
 584         matches++;
 585     }
 586     if (stringmatch(pattern,"save",0)) {
 587         sds buf = sdsempty();
 588         int j;
 589
 590         for (j = 0; j < server.saveparamslen; j++) {
 591             buf = sdscatprintf(buf,"%ld %d",
 592                     server.saveparams[j].seconds,
 593                     server.saveparams[j].changes);
 594             if (j != server.saveparamslen-1)
 595                 buf = sdscatlen(buf," ",1);
 596         }
 597         addReplyBulkCString(c,"save");
 598         addReplyBulkCString(c,buf);
 599         sdsfree(buf);
 600         matches++;
 601     }
 602     if (stringmatch(pattern,"auto-aof-rewrite-percentage",0)) {
 603         addReplyBulkCString(c,"auto-aof-rewrite-percentage");
 604         addReplyBulkLongLong(c,server.auto_aofrewrite_perc);
 605         matches++;
 606     }
 607     if (stringmatch(pattern,"auto-aof-rewrite-min-size",0)) {
 608         addReplyBulkCString(c,"auto-aof-rewrite-min-size");
 609         addReplyBulkLongLong(c,server.auto_aofrewrite_min_size);
 610         matches++;
 611     }
 612     if (stringmatch(pattern,"slave-serve-stale-data",0)) {
 613         addReplyBulkCString(c,"slave-serve-stale-data");
 614         addReplyBulkCString(c,server.repl_serve_stale_data ? "yes" : "no");
 615         matches++;
 616     }
 617     if (stringmatch(pattern,"hash-max-zipmap-entries",0)) {
 618         addReplyBulkCString(c,"hash-max-zipmap-entries");
 619         addReplyBulkLongLong(c,server.hash_max_zipmap_entries);
 620         matches++;
 621     }
 622     if (stringmatch(pattern,"hash-max-zipmap-value",0)) {
 623         addReplyBulkCString(c,"hash-max-zipmap-value");
 624         addReplyBulkLongLong(c,server.hash_max_zipmap_value);
 625         matches++;
 626     }
 627     if (stringmatch(pattern,"list-max-ziplist-entries",0)) {
 628         addReplyBulkCString(c,"list-max-ziplist-entries");
 629         addReplyBulkLongLong(c,server.list_max_ziplist_entries);
 630         matches++;
 631     }
 632     if (stringmatch(pattern,"list-max-ziplist-value",0)) {
 633         addReplyBulkCString(c,"list-max-ziplist-value");
 634         addReplyBulkLongLong(c,server.list_max_ziplist_value);
 635         matches++;
 636     }
 637     if (stringmatch(pattern,"set-max-intset-entries",0)) {
 638         addReplyBulkCString(c,"set-max-intset-entries");
 639         addReplyBulkLongLong(c,server.set_max_intset_entries);
 640         matches++;
 641     }
 642     if (stringmatch(pattern,"zset-max-ziplist-entries",0)) {
 643         addReplyBulkCString(c,"zset-max-ziplist-entries");
 644         addReplyBulkLongLong(c,server.zset_max_ziplist_entries);
 645         matches++;
 646     }
 647     if (stringmatch(pattern,"zset-max-ziplist-value",0)) {
 648         addReplyBulkCString(c,"zset-max-ziplist-value");
 649         addReplyBulkLongLong(c,server.zset_max_ziplist_value);
 650         matches++;
 651     }
 652     setDeferredMultiBulkLength(c,replylen,matches*2);
 653 }
 654
 655 void configCommand(redisClient *c) {
 656     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 657         if (c->argc != 4) goto badarity;
 658         configSetCommand(c);
 659     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 660         if (c->argc != 3) goto badarity;
 661         configGetCommand(c);
 662     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 663         if (c->argc != 2) goto badarity;
 664         server.stat_keyspace_hits = 0;
 665         server.stat_keyspace_misses = 0;
 666         server.stat_numcommands = 0;
 667         server.stat_numconnections = 0;
 668         server.stat_expiredkeys = 0;
 669         resetCommandTableStats();
 670         addReply(c,shared.ok);
 671     } else {
 672         addReplyError(c,
 673             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 674     }
 675     return;
 676
 677 badarity:
 678     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 679         (char*) c->argv[1]->ptr);
 680 }