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],"requirepass") && argc == 2) {
 235             server.requirepass = zstrdup(argv[1]);
 236         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 237             zfree(server.pidfile);
 238             server.pidfile = zstrdup(argv[1]);
 239         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 240             zfree(server.dbfilename);
 241             server.dbfilename = zstrdup(argv[1]);
 242         } else if (!strcasecmp(argv[0],"diskstore-enabled") && argc == 2) {
 243             if ((server.ds_enabled = yesnotoi(argv[1])) == -1) {
 244                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 245             }
 246         } else if (!strcasecmp(argv[0],"diskstore-path") && argc == 2) {
 247             sdsfree(server.ds_path);
 248             server.ds_path = sdsnew(argv[1]);
 249         } else if (!strcasecmp(argv[0],"cache-max-memory") && argc == 2) {
 250             server.cache_max_memory = memtoll(argv[1],NULL);
 251         } else if (!strcasecmp(argv[0],"cache-flush-delay") && argc == 2) {
 252             server.cache_flush_delay = atoi(argv[1]);
 253             if (server.cache_flush_delay < 0) server.cache_flush_delay = 0;
 254         } else if (!strcasecmp(argv[0],"hash-max-zipmap-entries") && argc == 2) {
 255             server.hash_max_zipmap_entries = memtoll(argv[1], NULL);
 256         } else if (!strcasecmp(argv[0],"hash-max-zipmap-value") && argc == 2) {
 257             server.hash_max_zipmap_value = memtoll(argv[1], NULL);
 258         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 259             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 260         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
 261             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 262         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2) {
 263             server.set_max_intset_entries = memtoll(argv[1], NULL);
 264         } else if (!strcasecmp(argv[0],"zset-max-ziplist-entries") && argc == 2) {
 265             server.zset_max_ziplist_entries = memtoll(argv[1], NULL);
 266         } else if (!strcasecmp(argv[0],"zset-max-ziplist-value") && argc == 2) {
 267             server.zset_max_ziplist_value = memtoll(argv[1], NULL);
 268         } else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
 269             struct redisCommand *cmd = lookupCommand(argv[1]);
 270             int retval;
 271
 272             if (!cmd) {
 273                 err = "No such command in rename-command";
 274                 goto loaderr;
 275             }
 276
 277             /* If the target command name is the emtpy string we just
 278              * remove it from the command table. */
 279             retval = dictDelete(server.commands, argv[1]);
 280             redisAssert(retval == DICT_OK);
 281
 282             /* Otherwise we re-add the command under a different name. */
 283             if (sdslen(argv[2]) != 0) {
 284                 sds copy = sdsdup(argv[2]);
 285
 286                 retval = dictAdd(server.commands, copy, cmd);
 287                 if (retval != DICT_OK) {
 288                     sdsfree(copy);
 289                     err = "Target command name already exists"; goto loaderr;
 290                 }
 291             }
 292         } else if (!strcasecmp(argv[0],"cluster-enabled") && argc == 2) {
 293             if ((server.cluster_enabled = yesnotoi(argv[1])) == -1) {
 294                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 295             }
 296         } else if (!strcasecmp(argv[0],"cluster-config-file") && argc == 2) {
 297             zfree(server.cluster.configfile);
 298             server.cluster.configfile = zstrdup(argv[1]);
 299         } else if (!strcasecmp(argv[0],"lua-time-limit") && argc == 2) {
 300             server.lua_time_limit = strtoll(argv[1],NULL,10);
 301         } else {
 302             err = "Bad directive or wrong number of arguments"; goto loaderr;
 303         }
 304         for (j = 0; j < argc; j++)
 305             sdsfree(argv[j]);
 306         zfree(argv);
 307         sdsfree(line);
 308     }
 309     if (fp != stdin) fclose(fp);
 310     return;
 311
 312 loaderr:
 313     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 314     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 315     fprintf(stderr, ">>> '%s'\n", line);
 316     fprintf(stderr, "%s\n", err);
 317     exit(1);
 318 }
 319
 320 /*-----------------------------------------------------------------------------
 321  * CONFIG command for remote configuration
 322  *----------------------------------------------------------------------------*/
 323
 324 void configSetCommand(redisClient *c) {
 325     robj *o;
 326     long long ll;
 327     redisAssert(c->argv[2]->encoding == REDIS_ENCODING_RAW);
 328     redisAssert(c->argv[3]->encoding == REDIS_ENCODING_RAW);
 329     o = c->argv[3];
 330
 331     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 332         zfree(server.dbfilename);
 333         server.dbfilename = zstrdup(o->ptr);
 334     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 335         zfree(server.requirepass);
 336         server.requirepass = zstrdup(o->ptr);
 337     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 338         zfree(server.masterauth);
 339         server.masterauth = zstrdup(o->ptr);
 340     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 341         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 342             ll < 0) goto badfmt;
 343         server.maxmemory = ll;
 344         if (server.maxmemory) freeMemoryIfNeeded();
 345     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 346         if (!strcasecmp(o->ptr,"volatile-lru")) {
 347             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 348         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 349             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 350         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 351             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 352         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 353             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 354         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 355             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 356         } else if (!strcasecmp(o->ptr,"noeviction")) {
 357             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 358         } else {
 359             goto badfmt;
 360         }
 361     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 362         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 363             ll <= 0) goto badfmt;
 364         server.maxmemory_samples = ll;
 365     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 366         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 367             ll < 0 || ll > LONG_MAX) goto badfmt;
 368         server.maxidletime = ll;
 369     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 370         if (!strcasecmp(o->ptr,"no")) {
 371             server.appendfsync = APPENDFSYNC_NO;
 372         } else if (!strcasecmp(o->ptr,"everysec")) {
 373             server.appendfsync = APPENDFSYNC_EVERYSEC;
 374         } else if (!strcasecmp(o->ptr,"always")) {
 375             server.appendfsync = APPENDFSYNC_ALWAYS;
 376         } else {
 377             goto badfmt;
 378         }
 379     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 380         int yn = yesnotoi(o->ptr);
 381
 382         if (yn == -1) goto badfmt;
 383         server.no_appendfsync_on_rewrite = yn;
 384     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 385         int old = server.appendonly;
 386         int new = yesnotoi(o->ptr);
 387
 388         if (new == -1) goto badfmt;
 389         if (old != new) {
 390             if (new == 0) {
 391                 stopAppendOnly();
 392             } else {
 393                 if (startAppendOnly() == REDIS_ERR) {
 394                     addReplyError(c,
 395                         "Unable to turn on AOF. Check server logs.");
 396                     return;
 397                 }
 398             }
 399         }
 400     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 401         int vlen, j;
 402         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 403
 404         /* Perform sanity check before setting the new config:
 405          * - Even number of args
 406          * - Seconds >= 1, changes >= 0 */
 407         if (vlen & 1) {
 408             sdsfreesplitres(v,vlen);
 409             goto badfmt;
 410         }
 411         for (j = 0; j < vlen; j++) {
 412             char *eptr;
 413             long val;
 414
 415             val = strtoll(v[j], &eptr, 10);
 416             if (eptr[0] != '\0' ||
 417                 ((j & 1) == 0 && val < 1) ||
 418                 ((j & 1) == 1 && val < 0)) {
 419                 sdsfreesplitres(v,vlen);
 420                 goto badfmt;
 421             }
 422         }
 423         /* Finally set the new config */
 424         resetServerSaveParams();
 425         for (j = 0; j < vlen; j += 2) {
 426             time_t seconds;
 427             int changes;
 428
 429             seconds = strtoll(v[j],NULL,10);
 430             changes = strtoll(v[j+1],NULL,10);
 431             appendServerSaveParams(seconds, changes);
 432         }
 433         sdsfreesplitres(v,vlen);
 434     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 435         int yn = yesnotoi(o->ptr);
 436
 437         if (yn == -1) goto badfmt;
 438         server.repl_serve_stale_data = yn;
 439     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 440         if (chdir((char*)o->ptr) == -1) {
 441             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 442             return;
 443         }
 444     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-zipmap-entries")) {
 445         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 446         server.hash_max_zipmap_entries = ll;
 447     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-zipmap-value")) {
 448         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 449         server.hash_max_zipmap_value = ll;
 450     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 451         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 452         server.list_max_ziplist_entries = ll;
 453     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 454         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 455         server.list_max_ziplist_value = ll;
 456     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 457         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 458         server.set_max_intset_entries = ll;
 459     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 460         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 461         server.zset_max_ziplist_entries = ll;
 462     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 463         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 464         server.zset_max_ziplist_value = ll;
 465     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
 466         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 467         server.lua_time_limit = ll;
 468     } else {
 469         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 470             (char*)c->argv[2]->ptr);
 471         return;
 472     }
 473     addReply(c,shared.ok);
 474     return;
 475
 476 badfmt: /* Bad format errors */
 477     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 478             (char*)o->ptr,
 479             (char*)c->argv[2]->ptr);
 480 }
 481
 482 void configGetCommand(redisClient *c) {
 483     robj *o = c->argv[2];
 484     void *replylen = addDeferredMultiBulkLength(c);
 485     char *pattern = o->ptr;
 486     char buf[128];
 487     int matches = 0;
 488     redisAssert(o->encoding == REDIS_ENCODING_RAW);
 489
 490     if (stringmatch(pattern,"dir",0)) {
 491         char buf[1024];
 492
 493         addReplyBulkCString(c,"dir");
 494         if (getcwd(buf,sizeof(buf)) == NULL) {
 495             buf[0] = '\0';
 496         } else {
 497             addReplyBulkCString(c,buf);
 498         }
 499         matches++;
 500     }
 501     if (stringmatch(pattern,"dbfilename",0)) {
 502         addReplyBulkCString(c,"dbfilename");
 503         addReplyBulkCString(c,server.dbfilename);
 504         matches++;
 505     }
 506     if (stringmatch(pattern,"requirepass",0)) {
 507         addReplyBulkCString(c,"requirepass");
 508         addReplyBulkCString(c,server.requirepass);
 509         matches++;
 510     }
 511     if (stringmatch(pattern,"masterauth",0)) {
 512         addReplyBulkCString(c,"masterauth");
 513         addReplyBulkCString(c,server.masterauth);
 514         matches++;
 515     }
 516     if (stringmatch(pattern,"maxmemory",0)) {
 517         ll2string(buf,sizeof(buf),server.maxmemory);
 518         addReplyBulkCString(c,"maxmemory");
 519         addReplyBulkCString(c,buf);
 520         matches++;
 521     }
 522     if (stringmatch(pattern,"maxmemory-policy",0)) {
 523         char *s;
 524
 525         switch(server.maxmemory_policy) {
 526         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 527         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 528         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 529         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 530         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 531         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 532         default: s = "unknown"; break; /* too harmless to panic */
 533         }
 534         addReplyBulkCString(c,"maxmemory-policy");
 535         addReplyBulkCString(c,s);
 536         matches++;
 537     }
 538     if (stringmatch(pattern,"maxmemory-samples",0)) {
 539         ll2string(buf,sizeof(buf),server.maxmemory_samples);
 540         addReplyBulkCString(c,"maxmemory-samples");
 541         addReplyBulkCString(c,buf);
 542         matches++;
 543     }
 544     if (stringmatch(pattern,"timeout",0)) {
 545         ll2string(buf,sizeof(buf),server.maxidletime);
 546         addReplyBulkCString(c,"timeout");
 547         addReplyBulkCString(c,buf);
 548         matches++;
 549     }
 550     if (stringmatch(pattern,"appendonly",0)) {
 551         addReplyBulkCString(c,"appendonly");
 552         addReplyBulkCString(c,server.appendonly ? "yes" : "no");
 553         matches++;
 554     }
 555     if (stringmatch(pattern,"no-appendfsync-on-rewrite",0)) {
 556         addReplyBulkCString(c,"no-appendfsync-on-rewrite");
 557         addReplyBulkCString(c,server.no_appendfsync_on_rewrite ? "yes" : "no");
 558         matches++;
 559     }
 560     if (stringmatch(pattern,"appendfsync",0)) {
 561         char *policy;
 562
 563         switch(server.appendfsync) {
 564         case APPENDFSYNC_NO: policy = "no"; break;
 565         case APPENDFSYNC_EVERYSEC: policy = "everysec"; break;
 566         case APPENDFSYNC_ALWAYS: policy = "always"; break;
 567         default: policy = "unknown"; break; /* too harmless to panic */
 568         }
 569         addReplyBulkCString(c,"appendfsync");
 570         addReplyBulkCString(c,policy);
 571         matches++;
 572     }
 573     if (stringmatch(pattern,"save",0)) {
 574         sds buf = sdsempty();
 575         int j;
 576
 577         for (j = 0; j < server.saveparamslen; j++) {
 578             buf = sdscatprintf(buf,"%ld %d",
 579                     server.saveparams[j].seconds,
 580                     server.saveparams[j].changes);
 581             if (j != server.saveparamslen-1)
 582                 buf = sdscatlen(buf," ",1);
 583         }
 584         addReplyBulkCString(c,"save");
 585         addReplyBulkCString(c,buf);
 586         sdsfree(buf);
 587         matches++;
 588     }
 589     if (stringmatch(pattern,"slave-serve-stale-data",0)) {
 590         addReplyBulkCString(c,"slave-serve-stale-data");
 591         addReplyBulkCString(c,server.repl_serve_stale_data ? "yes" : "no");
 592         matches++;
 593     }
 594     if (stringmatch(pattern,"hash-max-zipmap-entries",0)) {
 595         addReplyBulkCString(c,"hash-max-zipmap-entries");
 596         addReplyBulkLongLong(c,server.hash_max_zipmap_entries);
 597         matches++;
 598     }
 599     if (stringmatch(pattern,"hash-max-zipmap-value",0)) {
 600         addReplyBulkCString(c,"hash-max-zipmap-value");
 601         addReplyBulkLongLong(c,server.hash_max_zipmap_value);
 602         matches++;
 603     }
 604     if (stringmatch(pattern,"list-max-ziplist-entries",0)) {
 605         addReplyBulkCString(c,"list-max-ziplist-entries");
 606         addReplyBulkLongLong(c,server.list_max_ziplist_entries);
 607         matches++;
 608     }
 609     if (stringmatch(pattern,"list-max-ziplist-value",0)) {
 610         addReplyBulkCString(c,"list-max-ziplist-value");
 611         addReplyBulkLongLong(c,server.list_max_ziplist_value);
 612         matches++;
 613     }
 614     if (stringmatch(pattern,"set-max-intset-entries",0)) {
 615         addReplyBulkCString(c,"set-max-intset-entries");
 616         addReplyBulkLongLong(c,server.set_max_intset_entries);
 617         matches++;
 618     }
 619     if (stringmatch(pattern,"zset-max-ziplist-entries",0)) {
 620         addReplyBulkCString(c,"zset-max-ziplist-entries");
 621         addReplyBulkLongLong(c,server.zset_max_ziplist_entries);
 622         matches++;
 623     }
 624     if (stringmatch(pattern,"zset-max-ziplist-value",0)) {
 625         addReplyBulkCString(c,"zset-max-ziplist-value");
 626         addReplyBulkLongLong(c,server.zset_max_ziplist_value);
 627         matches++;
 628     }
 629     if (stringmatch(pattern,"lua-time-limit",0)) {
 630         addReplyBulkCString(c,"lua-time-limit");
 631         addReplyBulkLongLong(c,server.lua_time_limit);
 632         matches++;
 633     }
 634     setDeferredMultiBulkLength(c,replylen,matches*2);
 635 }
 636
 637 void configCommand(redisClient *c) {
 638     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 639         if (c->argc != 4) goto badarity;
 640         configSetCommand(c);
 641     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 642         if (c->argc != 3) goto badarity;
 643         configGetCommand(c);
 644     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 645         if (c->argc != 2) goto badarity;
 646         server.stat_keyspace_hits = 0;
 647         server.stat_keyspace_misses = 0;
 648         server.stat_numcommands = 0;
 649         server.stat_numconnections = 0;
 650         server.stat_expiredkeys = 0;
 651         resetCommandTableStats();
 652         addReply(c,shared.ok);
 653     } else {
 654         addReplyError(c,
 655             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 656     }
 657     return;
 658
 659 badarity:
 660     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 661         (char*) c->argv[1]->ptr);
 662 }