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 < 1 || server.port > 65535) {
  70                 err = "Invalid port"; goto loaderr;
  71             }
  72         } else if (!strcasecmp(argv[0],"bind") && argc == 2) {
  73             server.bindaddr = zstrdup(argv[1]);
  74         } else if (!strcasecmp(argv[0],"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],"syslog-ident") && argc == 2) {
 154
 155
 156             server.syslog_ident = zstrdup(argv[1]);
 157         } else if (!strcasecmp(argv[0],"databases") && argc == 2) {
 158             server.dbnum = atoi(argv[1]);
 159             if (server.dbnum < 1) {
 160                 err = "Invalid number of databases"; goto loaderr;
 161             }
 162         } else if (!strcasecmp(argv[0],"include") && argc == 2) {
 163             loadServerConfig(argv[1]);
 164         } else if (!strcasecmp(argv[0],"maxclients") && argc == 2) {
 165             server.maxclients = atoi(argv[1]);
 166         } else if (!strcasecmp(argv[0],"maxmemory") && argc == 2) {
 167             server.maxmemory = memtoll(argv[1],NULL);
 168         } else if (!strcasecmp(argv[0],"maxmemory-policy") && argc == 2) {
 169             if (!strcasecmp(argv[1],"volatile-lru")) {
 170                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 171             } else if (!strcasecmp(argv[1],"volatile-random")) {
 172                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 173             } else if (!strcasecmp(argv[1],"volatile-ttl")) {
 174                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 175             } else if (!strcasecmp(argv[1],"allkeys-lru")) {
 176                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 177             } else if (!strcasecmp(argv[1],"allkeys-random")) {
 178                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 179             } else if (!strcasecmp(argv[1],"noeviction")) {
 180                 server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 181             } else {
 182                 err = "Invalid maxmemory policy";
 183                 goto loaderr;
 184             }
 185         } else if (!strcasecmp(argv[0],"maxmemory-samples") && argc == 2) {
 186             server.maxmemory_samples = atoi(argv[1]);
 187             if (server.maxmemory_samples <= 0) {
 188                 err = "maxmemory-samples must be 1 or greater";
 189                 goto loaderr;
 190             }
 191         } else if (!strcasecmp(argv[0],"slaveof") && argc == 3) {
 192             server.masterhost = sdsnew(argv[1]);
 193             server.masterport = atoi(argv[2]);
 194             server.replstate = REDIS_REPL_CONNECT;
 195         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
 196                 server.masterauth = zstrdup(argv[1]);
 197         } else if (!strcasecmp(argv[0],"slave-serve-stale-data") && argc == 2) {
 198             if ((server.repl_serve_stale_data = yesnotoi(argv[1])) == -1) {
 199                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 200             }
 201         } else if (!strcasecmp(argv[0],"glueoutputbuf") && argc == 2) {
 202             if ((server.glueoutputbuf = yesnotoi(argv[1])) == -1) {
 203                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 204             }
 205         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 206             if ((server.rdbcompression = yesnotoi(argv[1])) == -1) {
 207                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 208             }
 209         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 210             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 211                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 212             }
 213         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 214             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 215                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 216             }
 217         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 218             if ((server.appendonly = yesnotoi(argv[1])) == -1) {
 219                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 220             }
 221         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 222             zfree(server.appendfilename);
 223             server.appendfilename = zstrdup(argv[1]);
 224         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 225                    && argc == 2) {
 226             if ((server.no_appendfsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 227                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 228             }
 229         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 230             if (!strcasecmp(argv[1],"no")) {
 231                 server.appendfsync = APPENDFSYNC_NO;
 232             } else if (!strcasecmp(argv[1],"always")) {
 233                 server.appendfsync = APPENDFSYNC_ALWAYS;
 234             } else if (!strcasecmp(argv[1],"everysec")) {
 235                 server.appendfsync = APPENDFSYNC_EVERYSEC;
 236             } else {
 237                 err = "argument must be 'no', 'always' or 'everysec'";
 238                 goto loaderr;
 239             }
 240         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 241             server.requirepass = zstrdup(argv[1]);
 242         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 243             zfree(server.pidfile);
 244             server.pidfile = zstrdup(argv[1]);
 245         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 246             zfree(server.dbfilename);
 247             server.dbfilename = zstrdup(argv[1]);
 248         } else if (!strcasecmp(argv[0],"vm-enabled") && argc == 2) {
 249             if ((server.vm_enabled = yesnotoi(argv[1])) == -1) {
 250                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 251             }
 252         } else if (!strcasecmp(argv[0],"vm-swap-file") && argc == 2) {
 253             zfree(server.vm_swap_file);
 254             server.vm_swap_file = zstrdup(argv[1]);
 255         } else if (!strcasecmp(argv[0],"vm-max-memory") && argc == 2) {
 256             server.vm_max_memory = memtoll(argv[1],NULL);
 257         } else if (!strcasecmp(argv[0],"vm-page-size") && argc == 2) {
 258             server.vm_page_size = memtoll(argv[1], NULL);
 259         } else if (!strcasecmp(argv[0],"vm-pages") && argc == 2) {
 260             server.vm_pages = memtoll(argv[1], NULL);
 261         } else if (!strcasecmp(argv[0],"vm-max-threads") && argc == 2) {
 262             server.vm_max_threads = strtoll(argv[1], NULL, 10);
 263         } else if (!strcasecmp(argv[0],"hash-max-zipmap-entries") && argc == 2) {
 264             server.hash_max_zipmap_entries = memtoll(argv[1], NULL);
 265         } else if (!strcasecmp(argv[0],"hash-max-zipmap-value") && argc == 2) {
 266             server.hash_max_zipmap_value = memtoll(argv[1], NULL);
 267         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 268             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 269         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
 270             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 271         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2) {
 272             server.set_max_intset_entries = memtoll(argv[1], NULL);
 273         } else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
 274             struct redisCommand *cmd = lookupCommand(argv[1]);
 275             int retval;
 276
 277             if (!cmd) {
 278                 err = "No such command in rename-command";
 279                 goto loaderr;
 280             }
 281
 282             /* If the target command name is the emtpy string we just
 283              * remove it from the command table. */
 284             retval = dictDelete(server.commands, argv[1]);
 285             redisAssert(retval == DICT_OK);
 286
 287             /* Otherwise we re-add the command under a different name. */
 288             if (sdslen(argv[2]) != 0) {
 289                 sds copy = sdsdup(argv[2]);
 290
 291                 retval = dictAdd(server.commands, copy, cmd);
 292                 if (retval != DICT_OK) {
 293                     sdsfree(copy);
 294                     err = "Target command name already exists"; goto loaderr;
 295                 }
 296             }
 297         } else {
 298             err = "Bad directive or wrong number of arguments"; goto loaderr;
 299         }
 300         for (j = 0; j < argc; j++)
 301             sdsfree(argv[j]);
 302         zfree(argv);
 303         sdsfree(line);
 304     }
 305     if (fp != stdin) fclose(fp);
 306     return;
 307
 308 loaderr:
 309     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 310     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 311     fprintf(stderr, ">>> '%s'\n", line);
 312     fprintf(stderr, "%s\n", err);
 313     exit(1);
 314 }
 315
 316 /*-----------------------------------------------------------------------------
 317  * CONFIG command for remote configuration
 318  *----------------------------------------------------------------------------*/
 319
 320 void configSetCommand(redisClient *c) {
 321     robj *o;
 322     long long ll;
 323     redisAssert(c->argv[2]->encoding == REDIS_ENCODING_RAW);
 324     redisAssert(c->argv[3]->encoding == REDIS_ENCODING_RAW);
 325     o = c->argv[3];
 326
 327     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 328         zfree(server.dbfilename);
 329         server.dbfilename = zstrdup(o->ptr);
 330     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 331         zfree(server.requirepass);
 332         server.requirepass = zstrdup(o->ptr);
 333     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 334         zfree(server.masterauth);
 335         server.masterauth = zstrdup(o->ptr);
 336     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 337         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 338             ll < 0) goto badfmt;
 339         server.maxmemory = ll;
 340         if (server.maxmemory) freeMemoryIfNeeded();
 341     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 342         if (!strcasecmp(o->ptr,"volatile-lru")) {
 343             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 344         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 345             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 346         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 347             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 348         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 349             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 350         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 351             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 352         } else if (!strcasecmp(o->ptr,"noeviction")) {
 353             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 354         } else {
 355             goto badfmt;
 356         }
 357     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 358         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 359             ll <= 0) goto badfmt;
 360         server.maxmemory_samples = ll;
 361     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 362         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 363             ll < 0 || ll > LONG_MAX) goto badfmt;
 364         server.maxidletime = ll;
 365     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 366         if (!strcasecmp(o->ptr,"no")) {
 367             server.appendfsync = APPENDFSYNC_NO;
 368         } else if (!strcasecmp(o->ptr,"everysec")) {
 369             server.appendfsync = APPENDFSYNC_EVERYSEC;
 370         } else if (!strcasecmp(o->ptr,"always")) {
 371             server.appendfsync = APPENDFSYNC_ALWAYS;
 372         } else {
 373             goto badfmt;
 374         }
 375     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 376         int yn = yesnotoi(o->ptr);
 377
 378         if (yn == -1) goto badfmt;
 379         server.no_appendfsync_on_rewrite = yn;
 380     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 381         int old = server.appendonly;
 382         int new = yesnotoi(o->ptr);
 383
 384         if (new == -1) goto badfmt;
 385         if (old != new) {
 386             if (new == 0) {
 387                 stopAppendOnly();
 388             } else {
 389                 if (startAppendOnly() == REDIS_ERR) {
 390                     addReplyError(c,
 391                         "Unable to turn on AOF. Check server logs.");
 392                     return;
 393                 }
 394             }
 395         }
 396     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 397         int vlen, j;
 398         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 399
 400         /* Perform sanity check before setting the new config:
 401          * - Even number of args
 402          * - Seconds >= 1, changes >= 0 */
 403         if (vlen & 1) {
 404             sdsfreesplitres(v,vlen);
 405             goto badfmt;
 406         }
 407         for (j = 0; j < vlen; j++) {
 408             char *eptr;
 409             long val;
 410
 411             val = strtoll(v[j], &eptr, 10);
 412             if (eptr[0] != '\0' ||
 413                 ((j & 1) == 0 && val < 1) ||
 414                 ((j & 1) == 1 && val < 0)) {
 415                 sdsfreesplitres(v,vlen);
 416                 goto badfmt;
 417             }
 418         }
 419         /* Finally set the new config */
 420         resetServerSaveParams();
 421         for (j = 0; j < vlen; j += 2) {
 422             time_t seconds;
 423             int changes;
 424
 425             seconds = strtoll(v[j],NULL,10);
 426             changes = strtoll(v[j+1],NULL,10);
 427             appendServerSaveParams(seconds, changes);
 428         }
 429         sdsfreesplitres(v,vlen);
 430     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 431         int yn = yesnotoi(o->ptr);
 432
 433         if (yn == -1) goto badfmt;
 434         server.repl_serve_stale_data = yn;
 435     } else {
 436         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 437             (char*)c->argv[2]->ptr);
 438         return;
 439     }
 440     addReply(c,shared.ok);
 441     return;
 442
 443 badfmt: /* Bad format errors */
 444     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 445             (char*)o->ptr,
 446             (char*)c->argv[2]->ptr);
 447 }
 448
 449 void configGetCommand(redisClient *c) {
 450     robj *o = c->argv[2];
 451     void *replylen = addDeferredMultiBulkLength(c);
 452     char *pattern = o->ptr;
 453     char buf[128];
 454     int matches = 0;
 455     redisAssert(o->encoding == REDIS_ENCODING_RAW);
 456
 457     if (stringmatch(pattern,"dbfilename",0)) {
 458         addReplyBulkCString(c,"dbfilename");
 459         addReplyBulkCString(c,server.dbfilename);
 460         matches++;
 461     }
 462     if (stringmatch(pattern,"requirepass",0)) {
 463         addReplyBulkCString(c,"requirepass");
 464         addReplyBulkCString(c,server.requirepass);
 465         matches++;
 466     }
 467     if (stringmatch(pattern,"masterauth",0)) {
 468         addReplyBulkCString(c,"masterauth");
 469         addReplyBulkCString(c,server.masterauth);
 470         matches++;
 471     }
 472     if (stringmatch(pattern,"maxmemory",0)) {
 473         ll2string(buf,sizeof(buf),server.maxmemory);
 474         addReplyBulkCString(c,"maxmemory");
 475         addReplyBulkCString(c,buf);
 476         matches++;
 477     }
 478     if (stringmatch(pattern,"maxmemory-policy",0)) {
 479         char *s;
 480
 481         switch(server.maxmemory_policy) {
 482         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 483         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 484         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 485         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 486         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 487         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 488         default: s = "unknown"; break; /* too harmless to panic */
 489         }
 490         addReplyBulkCString(c,"maxmemory-policy");
 491         addReplyBulkCString(c,s);
 492         matches++;
 493     }
 494     if (stringmatch(pattern,"maxmemory-samples",0)) {
 495         ll2string(buf,sizeof(buf),server.maxmemory_samples);
 496         addReplyBulkCString(c,"maxmemory-samples");
 497         addReplyBulkCString(c,buf);
 498         matches++;
 499     }
 500     if (stringmatch(pattern,"timeout",0)) {
 501         ll2string(buf,sizeof(buf),server.maxidletime);
 502         addReplyBulkCString(c,"timeout");
 503         addReplyBulkCString(c,buf);
 504         matches++;
 505     }
 506     if (stringmatch(pattern,"appendonly",0)) {
 507         addReplyBulkCString(c,"appendonly");
 508         addReplyBulkCString(c,server.appendonly ? "yes" : "no");
 509         matches++;
 510     }
 511     if (stringmatch(pattern,"no-appendfsync-on-rewrite",0)) {
 512         addReplyBulkCString(c,"no-appendfsync-on-rewrite");
 513         addReplyBulkCString(c,server.no_appendfsync_on_rewrite ? "yes" : "no");
 514         matches++;
 515     }
 516     if (stringmatch(pattern,"appendfsync",0)) {
 517         char *policy;
 518
 519         switch(server.appendfsync) {
 520         case APPENDFSYNC_NO: policy = "no"; break;
 521         case APPENDFSYNC_EVERYSEC: policy = "everysec"; break;
 522         case APPENDFSYNC_ALWAYS: policy = "always"; break;
 523         default: policy = "unknown"; break; /* too harmless to panic */
 524         }
 525         addReplyBulkCString(c,"appendfsync");
 526         addReplyBulkCString(c,policy);
 527         matches++;
 528     }
 529     if (stringmatch(pattern,"save",0)) {
 530         sds buf = sdsempty();
 531         int j;
 532
 533         for (j = 0; j < server.saveparamslen; j++) {
 534             buf = sdscatprintf(buf,"%ld %d",
 535                     server.saveparams[j].seconds,
 536                     server.saveparams[j].changes);
 537             if (j != server.saveparamslen-1)
 538                 buf = sdscatlen(buf," ",1);
 539         }
 540         addReplyBulkCString(c,"save");
 541         addReplyBulkCString(c,buf);
 542         sdsfree(buf);
 543         matches++;
 544     }
 545     if (stringmatch(pattern,"slave-serve-stale-data",0)) {
 546         addReplyBulkCString(c,"slave-serve-stale-data");
 547         addReplyBulkCString(c,server.repl_serve_stale_data ? "yes" : "no");
 548         matches++;
 549     }
 550     setDeferredMultiBulkLength(c,replylen,matches*2);
 551 }
 552
 553 void configCommand(redisClient *c) {
 554     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 555         if (c->argc != 4) goto badarity;
 556         configSetCommand(c);
 557     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 558         if (c->argc != 3) goto badarity;
 559         configGetCommand(c);
 560     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 561         if (c->argc != 2) goto badarity;
 562         server.stat_keyspace_hits = 0;
 563         server.stat_keyspace_misses = 0;
 564         server.stat_numcommands = 0;
 565         server.stat_numconnections = 0;
 566         server.stat_expiredkeys = 0;
 567         addReply(c,shared.ok);
 568     } else {
 569         addReplyError(c,
 570             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 571     }
 572     return;
 573
 574 badarity:
 575     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 576         (char*) c->argv[1]->ptr);
 577 }