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 void loadServerConfigFromString(char *config) {
  27     char *err = NULL;
  28     int linenum = 0, totlines, i;
  29     sds *lines;
  30
  31     lines = sdssplitlen(config,strlen(config),"\n",1,&totlines);
  32
  33     for (i = 0; i < totlines; i++) {
  34         sds *argv;
  35         int argc;
  36
  37         linenum = i+1;
  38         lines[i] = sdstrim(lines[i]," \t\r\n");
  39
  40         /* Skip comments and blank lines*/
  41         if (lines[i][0] == '#' || lines[i][0] == '\0') continue;
  42
  43         /* Split into arguments */
  44         argv = sdssplitargs(lines[i],&argc);
  45         sdstolower(argv[0]);
  46
  47         /* Execute config directives */
  48         if (!strcasecmp(argv[0],"timeout") && argc == 2) {
  49             server.maxidletime = atoi(argv[1]);
  50             if (server.maxidletime < 0) {
  51                 err = "Invalid timeout value"; goto loaderr;
  52             }
  53         } else if (!strcasecmp(argv[0],"port") && argc == 2) {
  54             server.port = atoi(argv[1]);
  55             if (server.port < 0 || server.port > 65535) {
  56                 err = "Invalid port"; goto loaderr;
  57             }
  58         } else if (!strcasecmp(argv[0],"bind") && argc == 2) {
  59             server.bindaddr = zstrdup(argv[1]);
  60         } else if (!strcasecmp(argv[0],"unixsocket") && argc == 2) {
  61             server.unixsocket = zstrdup(argv[1]);
  62         } else if (!strcasecmp(argv[0],"unixsocketperm") && argc == 2) {
  63             errno = 0;
  64             server.unixsocketperm = (mode_t)strtol(argv[1], NULL, 8);
  65             if (errno || server.unixsocketperm > 0777) {
  66                 err = "Invalid socket file permissions"; goto loaderr;
  67             }
  68         } else if (!strcasecmp(argv[0],"save")) {
  69             if (argc == 3) {
  70                 int seconds = atoi(argv[1]);
  71                 int changes = atoi(argv[2]);
  72                 if (seconds < 1 || changes < 0) {
  73                     err = "Invalid save parameters"; goto loaderr;
  74                 }
  75                 appendServerSaveParams(seconds,changes);
  76             } else if (argc == 2 && !strcasecmp(argv[1],"")) {
  77                 resetServerSaveParams();
  78             }
  79         } else if (!strcasecmp(argv[0],"dir") && argc == 2) {
  80             if (chdir(argv[1]) == -1) {
  81                 redisLog(REDIS_WARNING,"Can't chdir to '%s': %s",
  82                     argv[1], strerror(errno));
  83                 exit(1);
  84             }
  85         } else if (!strcasecmp(argv[0],"loglevel") && argc == 2) {
  86             if (!strcasecmp(argv[1],"debug")) server.verbosity = REDIS_DEBUG;
  87             else if (!strcasecmp(argv[1],"verbose")) server.verbosity = REDIS_VERBOSE;
  88             else if (!strcasecmp(argv[1],"notice")) server.verbosity = REDIS_NOTICE;
  89             else if (!strcasecmp(argv[1],"warning")) server.verbosity = REDIS_WARNING;
  90             else {
  91                 err = "Invalid log level. Must be one of debug, notice, warning";
  92                 goto loaderr;
  93             }
  94         } else if (!strcasecmp(argv[0],"logfile") && argc == 2) {
  95             FILE *logfp;
  96
  97             server.logfile = zstrdup(argv[1]);
  98             if (!strcasecmp(server.logfile,"stdout")) {
  99                 zfree(server.logfile);
 100                 server.logfile = NULL;
 101             }
 102             if (server.logfile) {
 103                 /* Test if we are able to open the file. The server will not
 104                  * be able to abort just for this problem later... */
 105                 logfp = fopen(server.logfile,"a");
 106                 if (logfp == NULL) {
 107                     err = sdscatprintf(sdsempty(),
 108                         "Can't open the log file: %s", strerror(errno));
 109                     goto loaderr;
 110                 }
 111                 fclose(logfp);
 112             }
 113         } else if (!strcasecmp(argv[0],"syslog-enabled") && argc == 2) {
 114             if ((server.syslog_enabled = yesnotoi(argv[1])) == -1) {
 115                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 116             }
 117         } else if (!strcasecmp(argv[0],"syslog-ident") && argc == 2) {
 118             if (server.syslog_ident) zfree(server.syslog_ident);
 119             server.syslog_ident = zstrdup(argv[1]);
 120         } else if (!strcasecmp(argv[0],"syslog-facility") && argc == 2) {
 121             struct {
 122                 const char     *name;
 123                 const int       value;
 124             } validSyslogFacilities[] = {
 125                 {"user",    LOG_USER},
 126                 {"local0",  LOG_LOCAL0},
 127                 {"local1",  LOG_LOCAL1},
 128                 {"local2",  LOG_LOCAL2},
 129                 {"local3",  LOG_LOCAL3},
 130                 {"local4",  LOG_LOCAL4},
 131                 {"local5",  LOG_LOCAL5},
 132                 {"local6",  LOG_LOCAL6},
 133                 {"local7",  LOG_LOCAL7},
 134                 {NULL, 0}
 135             };
 136             int i;
 137
 138             for (i = 0; validSyslogFacilities[i].name; i++) {
 139                 if (!strcasecmp(validSyslogFacilities[i].name, argv[1])) {
 140                     server.syslog_facility = validSyslogFacilities[i].value;
 141                     break;
 142                 }
 143             }
 144
 145             if (!validSyslogFacilities[i].name) {
 146                 err = "Invalid log facility. Must be one of USER or between LOCAL0-LOCAL7";
 147                 goto loaderr;
 148             }
 149         } else if (!strcasecmp(argv[0],"databases") && argc == 2) {
 150             server.dbnum = atoi(argv[1]);
 151             if (server.dbnum < 1) {
 152                 err = "Invalid number of databases"; goto loaderr;
 153             }
 154         } else if (!strcasecmp(argv[0],"include") && argc == 2) {
 155             loadServerConfig(argv[1],NULL);
 156         } else if (!strcasecmp(argv[0],"maxclients") && argc == 2) {
 157             server.maxclients = atoi(argv[1]);
 158         } else if (!strcasecmp(argv[0],"maxmemory") && argc == 2) {
 159             server.maxmemory = memtoll(argv[1],NULL);
 160         } else if (!strcasecmp(argv[0],"maxmemory-policy") && argc == 2) {
 161             if (!strcasecmp(argv[1],"volatile-lru")) {
 162                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 163             } else if (!strcasecmp(argv[1],"volatile-random")) {
 164                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 165             } else if (!strcasecmp(argv[1],"volatile-ttl")) {
 166                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 167             } else if (!strcasecmp(argv[1],"allkeys-lru")) {
 168                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 169             } else if (!strcasecmp(argv[1],"allkeys-random")) {
 170                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 171             } else if (!strcasecmp(argv[1],"noeviction")) {
 172                 server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 173             } else {
 174                 err = "Invalid maxmemory policy";
 175                 goto loaderr;
 176             }
 177         } else if (!strcasecmp(argv[0],"maxmemory-samples") && argc == 2) {
 178             server.maxmemory_samples = atoi(argv[1]);
 179             if (server.maxmemory_samples <= 0) {
 180                 err = "maxmemory-samples must be 1 or greater";
 181                 goto loaderr;
 182             }
 183         } else if (!strcasecmp(argv[0],"slaveof") && argc == 3) {
 184             server.masterhost = sdsnew(argv[1]);
 185             server.masterport = atoi(argv[2]);
 186             server.repl_state = REDIS_REPL_CONNECT;
 187         } else if (!strcasecmp(argv[0],"repl-ping-slave-period") && argc == 2) {
 188             server.repl_ping_slave_period = atoi(argv[1]);
 189             if (server.repl_ping_slave_period <= 0) {
 190                 err = "repl-ping-slave-period must be 1 or greater";
 191                 goto loaderr;
 192             }
 193         } else if (!strcasecmp(argv[0],"repl-timeout") && argc == 2) {
 194             server.repl_timeout = atoi(argv[1]);
 195             if (server.repl_timeout <= 0) {
 196                 err = "repl-timeout must be 1 or greater";
 197                 goto loaderr;
 198             }
 199         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
 200                 server.masterauth = zstrdup(argv[1]);
 201         } else if (!strcasecmp(argv[0],"slave-serve-stale-data") && argc == 2) {
 202             if ((server.repl_serve_stale_data = yesnotoi(argv[1])) == -1) {
 203                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 204             }
 205         } else if (!strcasecmp(argv[0],"glueoutputbuf")) {
 206             redisLog(REDIS_WARNING, "Deprecated configuration directive: \"%s\"", argv[0]);
 207         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 208             if ((server.rdb_compression = yesnotoi(argv[1])) == -1) {
 209                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 210             }
 211         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 212             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 213                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 214             }
 215         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 216             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 217                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 218             }
 219         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 220             int yes;
 221
 222             if ((yes = yesnotoi(argv[1])) == -1) {
 223                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 224             }
 225             server.aof_state = yes ? REDIS_AOF_ON : REDIS_AOF_OFF;
 226         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 227             zfree(server.aof_filename);
 228             server.aof_filename = zstrdup(argv[1]);
 229         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 230                    && argc == 2) {
 231             if ((server.aof_no_fsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 232                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 233             }
 234         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 235             if (!strcasecmp(argv[1],"no")) {
 236                 server.aof_fsync = AOF_FSYNC_NO;
 237             } else if (!strcasecmp(argv[1],"always")) {
 238                 server.aof_fsync = AOF_FSYNC_ALWAYS;
 239             } else if (!strcasecmp(argv[1],"everysec")) {
 240                 server.aof_fsync = AOF_FSYNC_EVERYSEC;
 241             } else {
 242                 err = "argument must be 'no', 'always' or 'everysec'";
 243                 goto loaderr;
 244             }
 245         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-percentage") &&
 246                    argc == 2)
 247         {
 248             server.aof_rewrite_perc = atoi(argv[1]);
 249             if (server.aof_rewrite_perc < 0) {
 250                 err = "Invalid negative percentage for AOF auto rewrite";
 251                 goto loaderr;
 252             }
 253         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-min-size") &&
 254                    argc == 2)
 255         {
 256             server.aof_rewrite_min_size = memtoll(argv[1],NULL);
 257         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 258             server.requirepass = zstrdup(argv[1]);
 259         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 260             zfree(server.pidfile);
 261             server.pidfile = zstrdup(argv[1]);
 262         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 263             zfree(server.rdb_filename);
 264             server.rdb_filename = zstrdup(argv[1]);
 265         } else if (!strcasecmp(argv[0],"hash-max-zipmap-entries") && argc == 2) {
 266             server.hash_max_zipmap_entries = memtoll(argv[1], NULL);
 267         } else if (!strcasecmp(argv[0],"hash-max-zipmap-value") && argc == 2) {
 268             server.hash_max_zipmap_value = memtoll(argv[1], NULL);
 269         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 270             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 271         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
 272             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 273         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2) {
 274             server.set_max_intset_entries = memtoll(argv[1], NULL);
 275         } else if (!strcasecmp(argv[0],"zset-max-ziplist-entries") && argc == 2) {
 276             server.zset_max_ziplist_entries = memtoll(argv[1], NULL);
 277         } else if (!strcasecmp(argv[0],"zset-max-ziplist-value") && argc == 2) {
 278             server.zset_max_ziplist_value = memtoll(argv[1], NULL);
 279         } else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
 280             struct redisCommand *cmd = lookupCommand(argv[1]);
 281             int retval;
 282
 283             if (!cmd) {
 284                 err = "No such command in rename-command";
 285                 goto loaderr;
 286             }
 287
 288             /* If the target command name is the emtpy string we just
 289              * remove it from the command table. */
 290             retval = dictDelete(server.commands, argv[1]);
 291             redisAssert(retval == DICT_OK);
 292
 293             /* Otherwise we re-add the command under a different name. */
 294             if (sdslen(argv[2]) != 0) {
 295                 sds copy = sdsdup(argv[2]);
 296
 297                 retval = dictAdd(server.commands, copy, cmd);
 298                 if (retval != DICT_OK) {
 299                     sdsfree(copy);
 300                     err = "Target command name already exists"; goto loaderr;
 301                 }
 302             }
 303         } else if (!strcasecmp(argv[0],"cluster-enabled") && argc == 2) {
 304             if ((server.cluster_enabled = yesnotoi(argv[1])) == -1) {
 305                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 306             }
 307         } else if (!strcasecmp(argv[0],"cluster-config-file") && argc == 2) {
 308             zfree(server.cluster.configfile);
 309             server.cluster.configfile = zstrdup(argv[1]);
 310         } else if (!strcasecmp(argv[0],"lua-time-limit") && argc == 2) {
 311             server.lua_time_limit = strtoll(argv[1],NULL,10);
 312         } else if (!strcasecmp(argv[0],"slowlog-log-slower-than") &&
 313                    argc == 2)
 314         {
 315             server.slowlog_log_slower_than = strtoll(argv[1],NULL,10);
 316         } else if (!strcasecmp(argv[0],"slowlog-max-len") && argc == 2) {
 317             server.slowlog_max_len = strtoll(argv[1],NULL,10);
 318         } else {
 319             err = "Bad directive or wrong number of arguments"; goto loaderr;
 320         }
 321         sdsfreesplitres(argv,argc);
 322     }
 323     sdsfreesplitres(lines,totlines);
 324     return;
 325
 326 loaderr:
 327     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 328     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 329     fprintf(stderr, ">>> '%s'\n", lines[i]);
 330     fprintf(stderr, "%s\n", err);
 331     exit(1);
 332 }
 333
 334 /* Load the server configuration from the specified filename.
 335  * The function appends the additional configuration directives stored
 336  * in the 'options' string to the config file before loading.
 337  *
 338  * Both filename and options can be NULL, in such a case are considered
 339  * emtpy. This way loadServerConfig can be used to just load a file or
 340  * just load a string. */
 341 void loadServerConfig(char *filename, char *options) {
 342     sds config = sdsempty();
 343     char buf[REDIS_CONFIGLINE_MAX+1];
 344
 345     /* Load the file content */
 346     if (filename) {
 347         FILE *fp;
 348
 349         if (filename[0] == '-' && filename[1] == '\0') {
 350             fp = stdin;
 351         } else {
 352             if ((fp = fopen(filename,"r")) == NULL) {
 353                 redisLog(REDIS_WARNING,
 354                     "Fatal error, can't open config file '%s'", filename);
 355                 exit(1);
 356             }
 357         }
 358         while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL)
 359             config = sdscat(config,buf);
 360         if (fp != stdin) fclose(fp);
 361     }
 362     /* Append the additional options */
 363     if (options) {
 364         config = sdscat(config,"\n");
 365         config = sdscat(config,options);
 366     }
 367     loadServerConfigFromString(config);
 368     sdsfree(config);
 369 }
 370
 371 /*-----------------------------------------------------------------------------
 372  * CONFIG command for remote configuration
 373  *----------------------------------------------------------------------------*/
 374
 375 void configSetCommand(redisClient *c) {
 376     robj *o;
 377     long long ll;
 378     redisAssertWithInfo(c,c->argv[2],c->argv[2]->encoding == REDIS_ENCODING_RAW);
 379     redisAssertWithInfo(c,c->argv[2],c->argv[3]->encoding == REDIS_ENCODING_RAW);
 380     o = c->argv[3];
 381
 382     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 383         zfree(server.rdb_filename);
 384         server.rdb_filename = zstrdup(o->ptr);
 385     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 386         zfree(server.requirepass);
 387         server.requirepass = ((char*)o->ptr)[0] ? zstrdup(o->ptr) : NULL;
 388     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 389         zfree(server.masterauth);
 390         server.masterauth = zstrdup(o->ptr);
 391     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 392         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 393             ll < 0) goto badfmt;
 394         server.maxmemory = ll;
 395         if (server.maxmemory) freeMemoryIfNeeded();
 396     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 397         if (!strcasecmp(o->ptr,"volatile-lru")) {
 398             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 399         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 400             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 401         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 402             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 403         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 404             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 405         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 406             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 407         } else if (!strcasecmp(o->ptr,"noeviction")) {
 408             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 409         } else {
 410             goto badfmt;
 411         }
 412     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 413         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 414             ll <= 0) goto badfmt;
 415         server.maxmemory_samples = ll;
 416     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 417         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 418             ll < 0 || ll > LONG_MAX) goto badfmt;
 419         server.maxidletime = ll;
 420     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 421         if (!strcasecmp(o->ptr,"no")) {
 422             server.aof_fsync = AOF_FSYNC_NO;
 423         } else if (!strcasecmp(o->ptr,"everysec")) {
 424             server.aof_fsync = AOF_FSYNC_EVERYSEC;
 425         } else if (!strcasecmp(o->ptr,"always")) {
 426             server.aof_fsync = AOF_FSYNC_ALWAYS;
 427         } else {
 428             goto badfmt;
 429         }
 430     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 431         int yn = yesnotoi(o->ptr);
 432
 433         if (yn == -1) goto badfmt;
 434         server.aof_no_fsync_on_rewrite = yn;
 435     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 436         int enable = yesnotoi(o->ptr);
 437
 438         if (enable == -1) goto badfmt;
 439         if (enable == 0 && server.aof_state != REDIS_AOF_OFF) {
 440             stopAppendOnly();
 441         } else if (enable && server.aof_state == REDIS_AOF_OFF) {
 442             if (startAppendOnly() == REDIS_ERR) {
 443                 addReplyError(c,
 444                     "Unable to turn on AOF. Check server logs.");
 445                 return;
 446             }
 447         }
 448     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-percentage")) {
 449         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 450         server.aof_rewrite_perc = ll;
 451     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-min-size")) {
 452         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 453         server.aof_rewrite_min_size = ll;
 454     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 455         int vlen, j;
 456         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 457
 458         /* Perform sanity check before setting the new config:
 459          * - Even number of args
 460          * - Seconds >= 1, changes >= 0 */
 461         if (vlen & 1) {
 462             sdsfreesplitres(v,vlen);
 463             goto badfmt;
 464         }
 465         for (j = 0; j < vlen; j++) {
 466             char *eptr;
 467             long val;
 468
 469             val = strtoll(v[j], &eptr, 10);
 470             if (eptr[0] != '\0' ||
 471                 ((j & 1) == 0 && val < 1) ||
 472                 ((j & 1) == 1 && val < 0)) {
 473                 sdsfreesplitres(v,vlen);
 474                 goto badfmt;
 475             }
 476         }
 477         /* Finally set the new config */
 478         resetServerSaveParams();
 479         for (j = 0; j < vlen; j += 2) {
 480             time_t seconds;
 481             int changes;
 482
 483             seconds = strtoll(v[j],NULL,10);
 484             changes = strtoll(v[j+1],NULL,10);
 485             appendServerSaveParams(seconds, changes);
 486         }
 487         sdsfreesplitres(v,vlen);
 488     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 489         int yn = yesnotoi(o->ptr);
 490
 491         if (yn == -1) goto badfmt;
 492         server.repl_serve_stale_data = yn;
 493     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 494         if (chdir((char*)o->ptr) == -1) {
 495             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 496             return;
 497         }
 498     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-zipmap-entries")) {
 499         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 500         server.hash_max_zipmap_entries = ll;
 501     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-zipmap-value")) {
 502         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 503         server.hash_max_zipmap_value = ll;
 504     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 505         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 506         server.list_max_ziplist_entries = ll;
 507     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 508         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 509         server.list_max_ziplist_value = ll;
 510     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 511         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 512         server.set_max_intset_entries = ll;
 513     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 514         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 515         server.zset_max_ziplist_entries = ll;
 516     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 517         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 518         server.zset_max_ziplist_value = ll;
 519     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
 520         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 521         server.lua_time_limit = ll;
 522     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-log-slower-than")) {
 523         if (getLongLongFromObject(o,&ll) == REDIS_ERR) goto badfmt;
 524         server.slowlog_log_slower_than = ll;
 525     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-max-len")) {
 526         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 527         server.slowlog_max_len = (unsigned)ll;
 528     } else if (!strcasecmp(c->argv[2]->ptr,"loglevel")) {
 529         if (!strcasecmp(o->ptr,"warning")) {
 530             server.verbosity = REDIS_WARNING;
 531         } else if (!strcasecmp(o->ptr,"notice")) {
 532             server.verbosity = REDIS_NOTICE;
 533         } else if (!strcasecmp(o->ptr,"verbose")) {
 534             server.verbosity = REDIS_VERBOSE;
 535         } else if (!strcasecmp(o->ptr,"debug")) {
 536             server.verbosity = REDIS_DEBUG;
 537         } else {
 538             goto badfmt;
 539         }
 540     } else {
 541         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 542             (char*)c->argv[2]->ptr);
 543         return;
 544     }
 545     addReply(c,shared.ok);
 546     return;
 547
 548 badfmt: /* Bad format errors */
 549     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 550             (char*)o->ptr,
 551             (char*)c->argv[2]->ptr);
 552 }
 553
 554 void configGetCommand(redisClient *c) {
 555     robj *o = c->argv[2];
 556     void *replylen = addDeferredMultiBulkLength(c);
 557     char *pattern = o->ptr;
 558     char buf[128];
 559     int matches = 0;
 560     redisAssertWithInfo(c,o,o->encoding == REDIS_ENCODING_RAW);
 561
 562     if (stringmatch(pattern,"dir",0)) {
 563         char buf[1024];
 564
 565         if (getcwd(buf,sizeof(buf)) == NULL)
 566             buf[0] = '\0';
 567
 568         addReplyBulkCString(c,"dir");
 569         addReplyBulkCString(c,buf);
 570         matches++;
 571     }
 572     if (stringmatch(pattern,"dbfilename",0)) {
 573         addReplyBulkCString(c,"dbfilename");
 574         addReplyBulkCString(c,server.rdb_filename);
 575         matches++;
 576     }
 577     if (stringmatch(pattern,"requirepass",0)) {
 578         addReplyBulkCString(c,"requirepass");
 579         addReplyBulkCString(c,server.requirepass);
 580         matches++;
 581     }
 582     if (stringmatch(pattern,"masterauth",0)) {
 583         addReplyBulkCString(c,"masterauth");
 584         addReplyBulkCString(c,server.masterauth);
 585         matches++;
 586     }
 587     if (stringmatch(pattern,"maxmemory",0)) {
 588         ll2string(buf,sizeof(buf),server.maxmemory);
 589         addReplyBulkCString(c,"maxmemory");
 590         addReplyBulkCString(c,buf);
 591         matches++;
 592     }
 593     if (stringmatch(pattern,"maxmemory-policy",0)) {
 594         char *s;
 595
 596         switch(server.maxmemory_policy) {
 597         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 598         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 599         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 600         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 601         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 602         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 603         default: s = "unknown"; break; /* too harmless to panic */
 604         }
 605         addReplyBulkCString(c,"maxmemory-policy");
 606         addReplyBulkCString(c,s);
 607         matches++;
 608     }
 609     if (stringmatch(pattern,"maxmemory-samples",0)) {
 610         ll2string(buf,sizeof(buf),server.maxmemory_samples);
 611         addReplyBulkCString(c,"maxmemory-samples");
 612         addReplyBulkCString(c,buf);
 613         matches++;
 614     }
 615     if (stringmatch(pattern,"timeout",0)) {
 616         ll2string(buf,sizeof(buf),server.maxidletime);
 617         addReplyBulkCString(c,"timeout");
 618         addReplyBulkCString(c,buf);
 619         matches++;
 620     }
 621     if (stringmatch(pattern,"appendonly",0)) {
 622         addReplyBulkCString(c,"appendonly");
 623         addReplyBulkCString(c,server.aof_state == REDIS_AOF_OFF ? "no" : "yes");
 624         matches++;
 625     }
 626     if (stringmatch(pattern,"no-appendfsync-on-rewrite",0)) {
 627         addReplyBulkCString(c,"no-appendfsync-on-rewrite");
 628         addReplyBulkCString(c,server.aof_no_fsync_on_rewrite ? "yes" : "no");
 629         matches++;
 630     }
 631     if (stringmatch(pattern,"appendfsync",0)) {
 632         char *policy;
 633
 634         switch(server.aof_fsync) {
 635         case AOF_FSYNC_NO: policy = "no"; break;
 636         case AOF_FSYNC_EVERYSEC: policy = "everysec"; break;
 637         case AOF_FSYNC_ALWAYS: policy = "always"; break;
 638         default: policy = "unknown"; break; /* too harmless to panic */
 639         }
 640         addReplyBulkCString(c,"appendfsync");
 641         addReplyBulkCString(c,policy);
 642         matches++;
 643     }
 644     if (stringmatch(pattern,"save",0)) {
 645         sds buf = sdsempty();
 646         int j;
 647
 648         for (j = 0; j < server.saveparamslen; j++) {
 649             buf = sdscatprintf(buf,"%ld %d",
 650                     server.saveparams[j].seconds,
 651                     server.saveparams[j].changes);
 652             if (j != server.saveparamslen-1)
 653                 buf = sdscatlen(buf," ",1);
 654         }
 655         addReplyBulkCString(c,"save");
 656         addReplyBulkCString(c,buf);
 657         sdsfree(buf);
 658         matches++;
 659     }
 660     if (stringmatch(pattern,"auto-aof-rewrite-percentage",0)) {
 661         addReplyBulkCString(c,"auto-aof-rewrite-percentage");
 662         addReplyBulkLongLong(c,server.aof_rewrite_perc);
 663         matches++;
 664     }
 665     if (stringmatch(pattern,"auto-aof-rewrite-min-size",0)) {
 666         addReplyBulkCString(c,"auto-aof-rewrite-min-size");
 667         addReplyBulkLongLong(c,server.aof_rewrite_min_size);
 668         matches++;
 669     }
 670     if (stringmatch(pattern,"slave-serve-stale-data",0)) {
 671         addReplyBulkCString(c,"slave-serve-stale-data");
 672         addReplyBulkCString(c,server.repl_serve_stale_data ? "yes" : "no");
 673         matches++;
 674     }
 675     if (stringmatch(pattern,"hash-max-zipmap-entries",0)) {
 676         addReplyBulkCString(c,"hash-max-zipmap-entries");
 677         addReplyBulkLongLong(c,server.hash_max_zipmap_entries);
 678         matches++;
 679     }
 680     if (stringmatch(pattern,"hash-max-zipmap-value",0)) {
 681         addReplyBulkCString(c,"hash-max-zipmap-value");
 682         addReplyBulkLongLong(c,server.hash_max_zipmap_value);
 683         matches++;
 684     }
 685     if (stringmatch(pattern,"list-max-ziplist-entries",0)) {
 686         addReplyBulkCString(c,"list-max-ziplist-entries");
 687         addReplyBulkLongLong(c,server.list_max_ziplist_entries);
 688         matches++;
 689     }
 690     if (stringmatch(pattern,"list-max-ziplist-value",0)) {
 691         addReplyBulkCString(c,"list-max-ziplist-value");
 692         addReplyBulkLongLong(c,server.list_max_ziplist_value);
 693         matches++;
 694     }
 695     if (stringmatch(pattern,"set-max-intset-entries",0)) {
 696         addReplyBulkCString(c,"set-max-intset-entries");
 697         addReplyBulkLongLong(c,server.set_max_intset_entries);
 698         matches++;
 699     }
 700     if (stringmatch(pattern,"zset-max-ziplist-entries",0)) {
 701         addReplyBulkCString(c,"zset-max-ziplist-entries");
 702         addReplyBulkLongLong(c,server.zset_max_ziplist_entries);
 703         matches++;
 704     }
 705     if (stringmatch(pattern,"zset-max-ziplist-value",0)) {
 706         addReplyBulkCString(c,"zset-max-ziplist-value");
 707         addReplyBulkLongLong(c,server.zset_max_ziplist_value);
 708         matches++;
 709     }
 710     if (stringmatch(pattern,"lua-time-limit",0)) {
 711         addReplyBulkCString(c,"lua-time-limit");
 712         addReplyBulkLongLong(c,server.lua_time_limit);
 713         matches++;
 714     }
 715     if (stringmatch(pattern,"slowlog-log-slower-than",0)) {
 716         addReplyBulkCString(c,"slowlog-log-slower-than");
 717         addReplyBulkLongLong(c,server.slowlog_log_slower_than);
 718         matches++;
 719     }
 720     if (stringmatch(pattern,"slowlog-max-len",0)) {
 721         addReplyBulkCString(c,"slowlog-max-len");
 722         addReplyBulkLongLong(c,server.slowlog_max_len);
 723         matches++;
 724     }
 725     if (stringmatch(pattern,"loglevel",0)) {
 726         char *s;
 727
 728         switch(server.verbosity) {
 729         case REDIS_WARNING: s = "warning"; break;
 730         case REDIS_VERBOSE: s = "verbose"; break;
 731         case REDIS_NOTICE: s = "notice"; break;
 732         case REDIS_DEBUG: s = "debug"; break;
 733         default: s = "unknown"; break; /* too harmless to panic */
 734         }
 735         addReplyBulkCString(c,"loglevel");
 736         addReplyBulkCString(c,s);
 737         matches++;
 738     }
 739     setDeferredMultiBulkLength(c,replylen,matches*2);
 740 }
 741
 742 void configCommand(redisClient *c) {
 743     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 744         if (c->argc != 4) goto badarity;
 745         configSetCommand(c);
 746     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 747         if (c->argc != 3) goto badarity;
 748         configGetCommand(c);
 749     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 750         if (c->argc != 2) goto badarity;
 751         server.stat_keyspace_hits = 0;
 752         server.stat_keyspace_misses = 0;
 753         server.stat_numcommands = 0;
 754         server.stat_numconnections = 0;
 755         server.stat_expiredkeys = 0;
 756         resetCommandTableStats();
 757         addReply(c,shared.ok);
 758     } else {
 759         addReplyError(c,
 760             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 761     }
 762     return;
 763
 764 badarity:
 765     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 766         (char*) c->argv[1]->ptr);
 767 }