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 if (!strcasecmp(argv[0],"client-output-buffer-limit") &&
 319                    argc == 5)
 320         {
 321             int class = getClientLimitClassByName(argv[1]);
 322             unsigned long long hard, soft;
 323             int soft_seconds;
 324
 325             if (class == -1) {
 326                 err = "Unrecognized client limit class";
 327                 goto loaderr;
 328             }
 329             hard = memtoll(argv[2],NULL);
 330             soft = memtoll(argv[3],NULL);
 331             soft_seconds = atoi(argv[4]);
 332             if (soft_seconds < 0) {
 333                 err = "Negative number of seconds in soft limt is invalid";
 334                 goto loaderr;
 335             }
 336             server.client_obuf_limits[class].hard_limit_bytes = hard;
 337             server.client_obuf_limits[class].soft_limit_bytes = soft;
 338             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 339         } else if (!strcasecmp(argv[0],"stop-writes-on-bgsave-error") &&
 340                    argc == 2) {
 341             if ((server.stop_writes_on_bgsave_err = yesnotoi(argv[1])) == -1) {
 342                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 343             }
 344         } else {
 345             err = "Bad directive or wrong number of arguments"; goto loaderr;
 346         }
 347         sdsfreesplitres(argv,argc);
 348     }
 349     sdsfreesplitres(lines,totlines);
 350     return;
 351
 352 loaderr:
 353     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 354     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 355     fprintf(stderr, ">>> '%s'\n", lines[i]);
 356     fprintf(stderr, "%s\n", err);
 357     exit(1);
 358 }
 359
 360 /* Load the server configuration from the specified filename.
 361  * The function appends the additional configuration directives stored
 362  * in the 'options' string to the config file before loading.
 363  *
 364  * Both filename and options can be NULL, in such a case are considered
 365  * emtpy. This way loadServerConfig can be used to just load a file or
 366  * just load a string. */
 367 void loadServerConfig(char *filename, char *options) {
 368     sds config = sdsempty();
 369     char buf[REDIS_CONFIGLINE_MAX+1];
 370
 371     /* Load the file content */
 372     if (filename) {
 373         FILE *fp;
 374
 375         if (filename[0] == '-' && filename[1] == '\0') {
 376             fp = stdin;
 377         } else {
 378             if ((fp = fopen(filename,"r")) == NULL) {
 379                 redisLog(REDIS_WARNING,
 380                     "Fatal error, can't open config file '%s'", filename);
 381                 exit(1);
 382             }
 383         }
 384         while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL)
 385             config = sdscat(config,buf);
 386         if (fp != stdin) fclose(fp);
 387     }
 388     /* Append the additional options */
 389     if (options) {
 390         config = sdscat(config,"\n");
 391         config = sdscat(config,options);
 392     }
 393     loadServerConfigFromString(config);
 394     sdsfree(config);
 395 }
 396
 397 /*-----------------------------------------------------------------------------
 398  * CONFIG command for remote configuration
 399  *----------------------------------------------------------------------------*/
 400
 401 void configSetCommand(redisClient *c) {
 402     robj *o;
 403     long long ll;
 404     redisAssertWithInfo(c,c->argv[2],c->argv[2]->encoding == REDIS_ENCODING_RAW);
 405     redisAssertWithInfo(c,c->argv[2],c->argv[3]->encoding == REDIS_ENCODING_RAW);
 406     o = c->argv[3];
 407
 408     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 409         zfree(server.rdb_filename);
 410         server.rdb_filename = zstrdup(o->ptr);
 411     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 412         zfree(server.requirepass);
 413         server.requirepass = ((char*)o->ptr)[0] ? zstrdup(o->ptr) : NULL;
 414     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 415         zfree(server.masterauth);
 416         server.masterauth = zstrdup(o->ptr);
 417     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 418         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 419             ll < 0) goto badfmt;
 420         server.maxmemory = ll;
 421         if (server.maxmemory) freeMemoryIfNeeded();
 422     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 423         if (!strcasecmp(o->ptr,"volatile-lru")) {
 424             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 425         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 426             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 427         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 428             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 429         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 430             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 431         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 432             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 433         } else if (!strcasecmp(o->ptr,"noeviction")) {
 434             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 435         } else {
 436             goto badfmt;
 437         }
 438     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 439         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 440             ll <= 0) goto badfmt;
 441         server.maxmemory_samples = ll;
 442     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 443         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 444             ll < 0 || ll > LONG_MAX) goto badfmt;
 445         server.maxidletime = ll;
 446     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 447         if (!strcasecmp(o->ptr,"no")) {
 448             server.aof_fsync = AOF_FSYNC_NO;
 449         } else if (!strcasecmp(o->ptr,"everysec")) {
 450             server.aof_fsync = AOF_FSYNC_EVERYSEC;
 451         } else if (!strcasecmp(o->ptr,"always")) {
 452             server.aof_fsync = AOF_FSYNC_ALWAYS;
 453         } else {
 454             goto badfmt;
 455         }
 456     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 457         int yn = yesnotoi(o->ptr);
 458
 459         if (yn == -1) goto badfmt;
 460         server.aof_no_fsync_on_rewrite = yn;
 461     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 462         int enable = yesnotoi(o->ptr);
 463
 464         if (enable == -1) goto badfmt;
 465         if (enable == 0 && server.aof_state != REDIS_AOF_OFF) {
 466             stopAppendOnly();
 467         } else if (enable && server.aof_state == REDIS_AOF_OFF) {
 468             if (startAppendOnly() == REDIS_ERR) {
 469                 addReplyError(c,
 470                     "Unable to turn on AOF. Check server logs.");
 471                 return;
 472             }
 473         }
 474     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-percentage")) {
 475         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 476         server.aof_rewrite_perc = ll;
 477     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-min-size")) {
 478         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 479         server.aof_rewrite_min_size = ll;
 480     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 481         int vlen, j;
 482         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 483
 484         /* Perform sanity check before setting the new config:
 485          * - Even number of args
 486          * - Seconds >= 1, changes >= 0 */
 487         if (vlen & 1) {
 488             sdsfreesplitres(v,vlen);
 489             goto badfmt;
 490         }
 491         for (j = 0; j < vlen; j++) {
 492             char *eptr;
 493             long val;
 494
 495             val = strtoll(v[j], &eptr, 10);
 496             if (eptr[0] != '\0' ||
 497                 ((j & 1) == 0 && val < 1) ||
 498                 ((j & 1) == 1 && val < 0)) {
 499                 sdsfreesplitres(v,vlen);
 500                 goto badfmt;
 501             }
 502         }
 503         /* Finally set the new config */
 504         resetServerSaveParams();
 505         for (j = 0; j < vlen; j += 2) {
 506             time_t seconds;
 507             int changes;
 508
 509             seconds = strtoll(v[j],NULL,10);
 510             changes = strtoll(v[j+1],NULL,10);
 511             appendServerSaveParams(seconds, changes);
 512         }
 513         sdsfreesplitres(v,vlen);
 514     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 515         int yn = yesnotoi(o->ptr);
 516
 517         if (yn == -1) goto badfmt;
 518         server.repl_serve_stale_data = yn;
 519     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 520         if (chdir((char*)o->ptr) == -1) {
 521             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 522             return;
 523         }
 524     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-zipmap-entries")) {
 525         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 526         server.hash_max_zipmap_entries = ll;
 527     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-zipmap-value")) {
 528         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 529         server.hash_max_zipmap_value = ll;
 530     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 531         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 532         server.list_max_ziplist_entries = ll;
 533     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 534         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 535         server.list_max_ziplist_value = ll;
 536     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 537         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 538         server.set_max_intset_entries = ll;
 539     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 540         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 541         server.zset_max_ziplist_entries = ll;
 542     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 543         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 544         server.zset_max_ziplist_value = ll;
 545     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
 546         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 547         server.lua_time_limit = ll;
 548     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-log-slower-than")) {
 549         if (getLongLongFromObject(o,&ll) == REDIS_ERR) goto badfmt;
 550         server.slowlog_log_slower_than = ll;
 551     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-max-len")) {
 552         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 553         server.slowlog_max_len = (unsigned)ll;
 554     } else if (!strcasecmp(c->argv[2]->ptr,"loglevel")) {
 555         if (!strcasecmp(o->ptr,"warning")) {
 556             server.verbosity = REDIS_WARNING;
 557         } else if (!strcasecmp(o->ptr,"notice")) {
 558             server.verbosity = REDIS_NOTICE;
 559         } else if (!strcasecmp(o->ptr,"verbose")) {
 560             server.verbosity = REDIS_VERBOSE;
 561         } else if (!strcasecmp(o->ptr,"debug")) {
 562             server.verbosity = REDIS_DEBUG;
 563         } else {
 564             goto badfmt;
 565         }
 566     } else if (!strcasecmp(c->argv[2]->ptr,"client-output-buffer-limit")) {
 567         int vlen, j;
 568         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 569
 570         /* We need a multiple of 4: <class> <hard> <soft> <soft_seconds> */
 571         if (vlen % 4) {
 572             sdsfreesplitres(v,vlen);
 573             goto badfmt;
 574         }
 575
 576         /* Sanity check of single arguments, so that we either refuse the
 577          * whole configuration string or accept it all, even if a single
 578          * error in a single client class is present. */
 579         for (j = 0; j < vlen; j++) {
 580             char *eptr;
 581             long val;
 582
 583             if ((j % 4) == 0) {
 584                 if (getClientLimitClassByName(v[j]) == -1) {
 585                     sdsfreesplitres(v,vlen);
 586                     goto badfmt;
 587                 }
 588             } else {
 589                 val = strtoll(v[j], &eptr, 10);
 590                 if (eptr[0] != '\0' || val < 0) {
 591                     sdsfreesplitres(v,vlen);
 592                     goto badfmt;
 593                 }
 594             }
 595         }
 596         /* Finally set the new config */
 597         for (j = 0; j < vlen; j += 4) {
 598             int class;
 599             unsigned long long hard, soft;
 600             int soft_seconds;
 601
 602             class = getClientLimitClassByName(v[j]);
 603             hard = strtoll(v[j+1],NULL,10);
 604             soft = strtoll(v[j+2],NULL,10);
 605             soft_seconds = strtoll(v[j+3],NULL,10);
 606
 607             server.client_obuf_limits[class].hard_limit_bytes = hard;
 608             server.client_obuf_limits[class].soft_limit_bytes = soft;
 609             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 610         }
 611         sdsfreesplitres(v,vlen);
 612     } else if (!strcasecmp(c->argv[2]->ptr,"stop-writes-on-bgsave-error")) {
 613         int yn = yesnotoi(o->ptr);
 614
 615         if (yn == -1) goto badfmt;
 616         server.stop_writes_on_bgsave_err = yn;
 617     } else {
 618         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 619             (char*)c->argv[2]->ptr);
 620         return;
 621     }
 622     addReply(c,shared.ok);
 623     return;
 624
 625 badfmt: /* Bad format errors */
 626     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 627             (char*)o->ptr,
 628             (char*)c->argv[2]->ptr);
 629 }
 630
 631 void configGetCommand(redisClient *c) {
 632     robj *o = c->argv[2];
 633     void *replylen = addDeferredMultiBulkLength(c);
 634     char *pattern = o->ptr;
 635     char buf[128];
 636     int matches = 0;
 637     redisAssertWithInfo(c,o,o->encoding == REDIS_ENCODING_RAW);
 638
 639     if (stringmatch(pattern,"dir",0)) {
 640         char buf[1024];
 641
 642         if (getcwd(buf,sizeof(buf)) == NULL)
 643             buf[0] = '\0';
 644
 645         addReplyBulkCString(c,"dir");
 646         addReplyBulkCString(c,buf);
 647         matches++;
 648     }
 649     if (stringmatch(pattern,"dbfilename",0)) {
 650         addReplyBulkCString(c,"dbfilename");
 651         addReplyBulkCString(c,server.rdb_filename);
 652         matches++;
 653     }
 654     if (stringmatch(pattern,"requirepass",0)) {
 655         addReplyBulkCString(c,"requirepass");
 656         addReplyBulkCString(c,server.requirepass);
 657         matches++;
 658     }
 659     if (stringmatch(pattern,"masterauth",0)) {
 660         addReplyBulkCString(c,"masterauth");
 661         addReplyBulkCString(c,server.masterauth);
 662         matches++;
 663     }
 664     if (stringmatch(pattern,"maxmemory",0)) {
 665         ll2string(buf,sizeof(buf),server.maxmemory);
 666         addReplyBulkCString(c,"maxmemory");
 667         addReplyBulkCString(c,buf);
 668         matches++;
 669     }
 670     if (stringmatch(pattern,"maxmemory-policy",0)) {
 671         char *s;
 672
 673         switch(server.maxmemory_policy) {
 674         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 675         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 676         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 677         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 678         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 679         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 680         default: s = "unknown"; break; /* too harmless to panic */
 681         }
 682         addReplyBulkCString(c,"maxmemory-policy");
 683         addReplyBulkCString(c,s);
 684         matches++;
 685     }
 686     if (stringmatch(pattern,"maxmemory-samples",0)) {
 687         ll2string(buf,sizeof(buf),server.maxmemory_samples);
 688         addReplyBulkCString(c,"maxmemory-samples");
 689         addReplyBulkCString(c,buf);
 690         matches++;
 691     }
 692     if (stringmatch(pattern,"timeout",0)) {
 693         ll2string(buf,sizeof(buf),server.maxidletime);
 694         addReplyBulkCString(c,"timeout");
 695         addReplyBulkCString(c,buf);
 696         matches++;
 697     }
 698     if (stringmatch(pattern,"appendonly",0)) {
 699         addReplyBulkCString(c,"appendonly");
 700         addReplyBulkCString(c,server.aof_state == REDIS_AOF_OFF ? "no" : "yes");
 701         matches++;
 702     }
 703     if (stringmatch(pattern,"no-appendfsync-on-rewrite",0)) {
 704         addReplyBulkCString(c,"no-appendfsync-on-rewrite");
 705         addReplyBulkCString(c,server.aof_no_fsync_on_rewrite ? "yes" : "no");
 706         matches++;
 707     }
 708     if (stringmatch(pattern,"appendfsync",0)) {
 709         char *policy;
 710
 711         switch(server.aof_fsync) {
 712         case AOF_FSYNC_NO: policy = "no"; break;
 713         case AOF_FSYNC_EVERYSEC: policy = "everysec"; break;
 714         case AOF_FSYNC_ALWAYS: policy = "always"; break;
 715         default: policy = "unknown"; break; /* too harmless to panic */
 716         }
 717         addReplyBulkCString(c,"appendfsync");
 718         addReplyBulkCString(c,policy);
 719         matches++;
 720     }
 721     if (stringmatch(pattern,"save",0)) {
 722         sds buf = sdsempty();
 723         int j;
 724
 725         for (j = 0; j < server.saveparamslen; j++) {
 726             buf = sdscatprintf(buf,"%ld %d",
 727                     server.saveparams[j].seconds,
 728                     server.saveparams[j].changes);
 729             if (j != server.saveparamslen-1)
 730                 buf = sdscatlen(buf," ",1);
 731         }
 732         addReplyBulkCString(c,"save");
 733         addReplyBulkCString(c,buf);
 734         sdsfree(buf);
 735         matches++;
 736     }
 737     if (stringmatch(pattern,"auto-aof-rewrite-percentage",0)) {
 738         addReplyBulkCString(c,"auto-aof-rewrite-percentage");
 739         addReplyBulkLongLong(c,server.aof_rewrite_perc);
 740         matches++;
 741     }
 742     if (stringmatch(pattern,"auto-aof-rewrite-min-size",0)) {
 743         addReplyBulkCString(c,"auto-aof-rewrite-min-size");
 744         addReplyBulkLongLong(c,server.aof_rewrite_min_size);
 745         matches++;
 746     }
 747     if (stringmatch(pattern,"slave-serve-stale-data",0)) {
 748         addReplyBulkCString(c,"slave-serve-stale-data");
 749         addReplyBulkCString(c,server.repl_serve_stale_data ? "yes" : "no");
 750         matches++;
 751     }
 752     if (stringmatch(pattern,"hash-max-zipmap-entries",0)) {
 753         addReplyBulkCString(c,"hash-max-zipmap-entries");
 754         addReplyBulkLongLong(c,server.hash_max_zipmap_entries);
 755         matches++;
 756     }
 757     if (stringmatch(pattern,"hash-max-zipmap-value",0)) {
 758         addReplyBulkCString(c,"hash-max-zipmap-value");
 759         addReplyBulkLongLong(c,server.hash_max_zipmap_value);
 760         matches++;
 761     }
 762     if (stringmatch(pattern,"list-max-ziplist-entries",0)) {
 763         addReplyBulkCString(c,"list-max-ziplist-entries");
 764         addReplyBulkLongLong(c,server.list_max_ziplist_entries);
 765         matches++;
 766     }
 767     if (stringmatch(pattern,"list-max-ziplist-value",0)) {
 768         addReplyBulkCString(c,"list-max-ziplist-value");
 769         addReplyBulkLongLong(c,server.list_max_ziplist_value);
 770         matches++;
 771     }
 772     if (stringmatch(pattern,"set-max-intset-entries",0)) {
 773         addReplyBulkCString(c,"set-max-intset-entries");
 774         addReplyBulkLongLong(c,server.set_max_intset_entries);
 775         matches++;
 776     }
 777     if (stringmatch(pattern,"zset-max-ziplist-entries",0)) {
 778         addReplyBulkCString(c,"zset-max-ziplist-entries");
 779         addReplyBulkLongLong(c,server.zset_max_ziplist_entries);
 780         matches++;
 781     }
 782     if (stringmatch(pattern,"zset-max-ziplist-value",0)) {
 783         addReplyBulkCString(c,"zset-max-ziplist-value");
 784         addReplyBulkLongLong(c,server.zset_max_ziplist_value);
 785         matches++;
 786     }
 787     if (stringmatch(pattern,"lua-time-limit",0)) {
 788         addReplyBulkCString(c,"lua-time-limit");
 789         addReplyBulkLongLong(c,server.lua_time_limit);
 790         matches++;
 791     }
 792     if (stringmatch(pattern,"slowlog-log-slower-than",0)) {
 793         addReplyBulkCString(c,"slowlog-log-slower-than");
 794         addReplyBulkLongLong(c,server.slowlog_log_slower_than);
 795         matches++;
 796     }
 797     if (stringmatch(pattern,"slowlog-max-len",0)) {
 798         addReplyBulkCString(c,"slowlog-max-len");
 799         addReplyBulkLongLong(c,server.slowlog_max_len);
 800         matches++;
 801     }
 802     if (stringmatch(pattern,"loglevel",0)) {
 803         char *s;
 804
 805         switch(server.verbosity) {
 806         case REDIS_WARNING: s = "warning"; break;
 807         case REDIS_VERBOSE: s = "verbose"; break;
 808         case REDIS_NOTICE: s = "notice"; break;
 809         case REDIS_DEBUG: s = "debug"; break;
 810         default: s = "unknown"; break; /* too harmless to panic */
 811         }
 812         addReplyBulkCString(c,"loglevel");
 813         addReplyBulkCString(c,s);
 814         matches++;
 815     }
 816     if (stringmatch(pattern,"client-output-buffer-limit",0)) {
 817         sds buf = sdsempty();
 818         int j;
 819
 820         for (j = 0; j < REDIS_CLIENT_LIMIT_NUM_CLASSES; j++) {
 821             buf = sdscatprintf(buf,"%s %llu %llu %ld",
 822                     getClientLimitClassName(j),
 823                     server.client_obuf_limits[j].hard_limit_bytes,
 824                     server.client_obuf_limits[j].soft_limit_bytes,
 825                     (long) server.client_obuf_limits[j].soft_limit_seconds);
 826             if (j != REDIS_CLIENT_LIMIT_NUM_CLASSES-1)
 827                 buf = sdscatlen(buf," ",1);
 828         }
 829         addReplyBulkCString(c,"client-output-buffer-limit");
 830         addReplyBulkCString(c,buf);
 831         sdsfree(buf);
 832         matches++;
 833     }
 834     if (stringmatch(pattern,"stop-writes-on-bgsave-error",0)) {
 835         addReplyBulkCString(c,"stop-writes-on-bgsave-error");
 836         addReplyBulkCString(c,server.stop_writes_on_bgsave_err ? "yes" : "no");
 837         matches++;
 838     }
 839     setDeferredMultiBulkLength(c,replylen,matches*2);
 840 }
 841
 842 void configCommand(redisClient *c) {
 843     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 844         if (c->argc != 4) goto badarity;
 845         configSetCommand(c);
 846     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 847         if (c->argc != 3) goto badarity;
 848         configGetCommand(c);
 849     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 850         if (c->argc != 2) goto badarity;
 851         server.stat_keyspace_hits = 0;
 852         server.stat_keyspace_misses = 0;
 853         server.stat_numcommands = 0;
 854         server.stat_numconnections = 0;
 855         server.stat_expiredkeys = 0;
 856         resetCommandTableStats();
 857         addReply(c,shared.ok);
 858     } else {
 859         addReplyError(c,
 860             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 861     }
 862     return;
 863
 864 badarity:
 865     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 866         (char*) c->argv[1]->ptr);
 867 }