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