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