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             if (server.maxclients < 1) {
 159                 err = "Invalid max clients limit"; goto loaderr;
 160             }
 161         } else if (!strcasecmp(argv[0],"maxmemory") && argc == 2) {
 162             server.maxmemory = memtoll(argv[1],NULL);
 163         } else if (!strcasecmp(argv[0],"maxmemory-policy") && argc == 2) {
 164             if (!strcasecmp(argv[1],"volatile-lru")) {
 165                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 166             } else if (!strcasecmp(argv[1],"volatile-random")) {
 167                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 168             } else if (!strcasecmp(argv[1],"volatile-ttl")) {
 169                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 170             } else if (!strcasecmp(argv[1],"allkeys-lru")) {
 171                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 172             } else if (!strcasecmp(argv[1],"allkeys-random")) {
 173                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 174             } else if (!strcasecmp(argv[1],"noeviction")) {
 175                 server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 176             } else {
 177                 err = "Invalid maxmemory policy";
 178                 goto loaderr;
 179             }
 180         } else if (!strcasecmp(argv[0],"maxmemory-samples") && argc == 2) {
 181             server.maxmemory_samples = atoi(argv[1]);
 182             if (server.maxmemory_samples <= 0) {
 183                 err = "maxmemory-samples must be 1 or greater";
 184                 goto loaderr;
 185             }
 186         } else if (!strcasecmp(argv[0],"slaveof") && argc == 3) {
 187             server.masterhost = sdsnew(argv[1]);
 188             server.masterport = atoi(argv[2]);
 189             server.repl_state = REDIS_REPL_CONNECT;
 190         } else if (!strcasecmp(argv[0],"repl-ping-slave-period") && argc == 2) {
 191             server.repl_ping_slave_period = atoi(argv[1]);
 192             if (server.repl_ping_slave_period <= 0) {
 193                 err = "repl-ping-slave-period must be 1 or greater";
 194                 goto loaderr;
 195             }
 196         } else if (!strcasecmp(argv[0],"repl-timeout") && argc == 2) {
 197             server.repl_timeout = atoi(argv[1]);
 198             if (server.repl_timeout <= 0) {
 199                 err = "repl-timeout must be 1 or greater";
 200                 goto loaderr;
 201             }
 202         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
 203                 server.masterauth = zstrdup(argv[1]);
 204         } else if (!strcasecmp(argv[0],"slave-serve-stale-data") && argc == 2) {
 205             if ((server.repl_serve_stale_data = yesnotoi(argv[1])) == -1) {
 206                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 207             }
 208         } else if (!strcasecmp(argv[0],"slave-read-only") && argc == 2) {
 209             if ((server.repl_slave_ro = yesnotoi(argv[1])) == -1) {
 210                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 211             }
 212         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 213             if ((server.rdb_compression = yesnotoi(argv[1])) == -1) {
 214                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 215             }
 216         } else if (!strcasecmp(argv[0],"rdbchecksum") && argc == 2) {
 217             if ((server.rdb_checksum = yesnotoi(argv[1])) == -1) {
 218                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 219             }
 220         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 221             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 222                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 223             }
 224         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 225             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 226                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 227             }
 228         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 229             int yes;
 230
 231             if ((yes = yesnotoi(argv[1])) == -1) {
 232                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 233             }
 234             server.aof_state = yes ? REDIS_AOF_ON : REDIS_AOF_OFF;
 235         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 236             zfree(server.aof_filename);
 237             server.aof_filename = zstrdup(argv[1]);
 238         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 239                    && argc == 2) {
 240             if ((server.aof_no_fsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 241                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 242             }
 243         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 244             if (!strcasecmp(argv[1],"no")) {
 245                 server.aof_fsync = AOF_FSYNC_NO;
 246             } else if (!strcasecmp(argv[1],"always")) {
 247                 server.aof_fsync = AOF_FSYNC_ALWAYS;
 248             } else if (!strcasecmp(argv[1],"everysec")) {
 249                 server.aof_fsync = AOF_FSYNC_EVERYSEC;
 250             } else {
 251                 err = "argument must be 'no', 'always' or 'everysec'";
 252                 goto loaderr;
 253             }
 254         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-percentage") &&
 255                    argc == 2)
 256         {
 257             server.aof_rewrite_perc = atoi(argv[1]);
 258             if (server.aof_rewrite_perc < 0) {
 259                 err = "Invalid negative percentage for AOF auto rewrite";
 260                 goto loaderr;
 261             }
 262         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-min-size") &&
 263                    argc == 2)
 264         {
 265             server.aof_rewrite_min_size = memtoll(argv[1],NULL);
 266         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 267             server.requirepass = zstrdup(argv[1]);
 268         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 269             zfree(server.pidfile);
 270             server.pidfile = zstrdup(argv[1]);
 271         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 272             zfree(server.rdb_filename);
 273             server.rdb_filename = zstrdup(argv[1]);
 274         } else if (!strcasecmp(argv[0],"hash-max-ziplist-entries") && argc == 2) {
 275             server.hash_max_ziplist_entries = memtoll(argv[1], NULL);
 276         } else if (!strcasecmp(argv[0],"hash-max-ziplist-value") && argc == 2) {
 277             server.hash_max_ziplist_value = memtoll(argv[1], NULL);
 278         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 279             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 280         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
 281             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 282         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2) {
 283             server.set_max_intset_entries = memtoll(argv[1], NULL);
 284         } else if (!strcasecmp(argv[0],"zset-max-ziplist-entries") && argc == 2) {
 285             server.zset_max_ziplist_entries = memtoll(argv[1], NULL);
 286         } else if (!strcasecmp(argv[0],"zset-max-ziplist-value") && argc == 2) {
 287             server.zset_max_ziplist_value = memtoll(argv[1], NULL);
 288         } else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
 289             struct redisCommand *cmd = lookupCommand(argv[1]);
 290             int retval;
 291
 292             if (!cmd) {
 293                 err = "No such command in rename-command";
 294                 goto loaderr;
 295             }
 296
 297             /* If the target command name is the emtpy string we just
 298              * remove it from the command table. */
 299             retval = dictDelete(server.commands, argv[1]);
 300             redisAssert(retval == DICT_OK);
 301
 302             /* Otherwise we re-add the command under a different name. */
 303             if (sdslen(argv[2]) != 0) {
 304                 sds copy = sdsdup(argv[2]);
 305
 306                 retval = dictAdd(server.commands, copy, cmd);
 307                 if (retval != DICT_OK) {
 308                     sdsfree(copy);
 309                     err = "Target command name already exists"; goto loaderr;
 310                 }
 311             }
 312         } else if (!strcasecmp(argv[0],"lua-time-limit") && argc == 2) {
 313             server.lua_time_limit = strtoll(argv[1],NULL,10);
 314         } else if (!strcasecmp(argv[0],"slowlog-log-slower-than") &&
 315                    argc == 2)
 316         {
 317             server.slowlog_log_slower_than = strtoll(argv[1],NULL,10);
 318         } else if (!strcasecmp(argv[0],"slowlog-max-len") && argc == 2) {
 319             server.slowlog_max_len = strtoll(argv[1],NULL,10);
 320         } else if (!strcasecmp(argv[0],"client-output-buffer-limit") &&
 321                    argc == 5)
 322         {
 323             int class = getClientLimitClassByName(argv[1]);
 324             unsigned long long hard, soft;
 325             int soft_seconds;
 326
 327             if (class == -1) {
 328                 err = "Unrecognized client limit class";
 329                 goto loaderr;
 330             }
 331             hard = memtoll(argv[2],NULL);
 332             soft = memtoll(argv[3],NULL);
 333             soft_seconds = atoi(argv[4]);
 334             if (soft_seconds < 0) {
 335                 err = "Negative number of seconds in soft limt is invalid";
 336                 goto loaderr;
 337             }
 338             server.client_obuf_limits[class].hard_limit_bytes = hard;
 339             server.client_obuf_limits[class].soft_limit_bytes = soft;
 340             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 341         } else if (!strcasecmp(argv[0],"stop-writes-on-bgsave-error") &&
 342                    argc == 2) {
 343             if ((server.stop_writes_on_bgsave_err = yesnotoi(argv[1])) == -1) {
 344                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 345             }
 346         } else {
 347             err = "Bad directive or wrong number of arguments"; goto loaderr;
 348         }
 349         sdsfreesplitres(argv,argc);
 350     }
 351     sdsfreesplitres(lines,totlines);
 352     return;
 353
 354 loaderr:
 355     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 356     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 357     fprintf(stderr, ">>> '%s'\n", lines[i]);
 358     fprintf(stderr, "%s\n", err);
 359     exit(1);
 360 }
 361
 362 /* Load the server configuration from the specified filename.
 363  * The function appends the additional configuration directives stored
 364  * in the 'options' string to the config file before loading.
 365  *
 366  * Both filename and options can be NULL, in such a case are considered
 367  * emtpy. This way loadServerConfig can be used to just load a file or
 368  * just load a string. */
 369 void loadServerConfig(char *filename, char *options) {
 370     sds config = sdsempty();
 371     char buf[REDIS_CONFIGLINE_MAX+1];
 372
 373     /* Load the file content */
 374     if (filename) {
 375         FILE *fp;
 376
 377         if (filename[0] == '-' && filename[1] == '\0') {
 378             fp = stdin;
 379         } else {
 380             if ((fp = fopen(filename,"r")) == NULL) {
 381                 redisLog(REDIS_WARNING,
 382                     "Fatal error, can't open config file '%s'", filename);
 383                 exit(1);
 384             }
 385         }
 386         while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL)
 387             config = sdscat(config,buf);
 388         if (fp != stdin) fclose(fp);
 389     }
 390     /* Append the additional options */
 391     if (options) {
 392         config = sdscat(config,"\n");
 393         config = sdscat(config,options);
 394     }
 395     loadServerConfigFromString(config);
 396     sdsfree(config);
 397 }
 398
 399 /*-----------------------------------------------------------------------------
 400  * CONFIG command for remote configuration
 401  *----------------------------------------------------------------------------*/
 402
 403 void configSetCommand(redisClient *c) {
 404     robj *o;
 405     long long ll;
 406     redisAssertWithInfo(c,c->argv[2],c->argv[2]->encoding == REDIS_ENCODING_RAW);
 407     redisAssertWithInfo(c,c->argv[2],c->argv[3]->encoding == REDIS_ENCODING_RAW);
 408     o = c->argv[3];
 409
 410     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 411         zfree(server.rdb_filename);
 412         server.rdb_filename = zstrdup(o->ptr);
 413     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 414         zfree(server.requirepass);
 415         server.requirepass = ((char*)o->ptr)[0] ? zstrdup(o->ptr) : NULL;
 416     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 417         zfree(server.masterauth);
 418         server.masterauth = zstrdup(o->ptr);
 419     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 420         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 421             ll < 0) goto badfmt;
 422         server.maxmemory = ll;
 423         if (server.maxmemory) freeMemoryIfNeeded();
 424     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 425         if (!strcasecmp(o->ptr,"volatile-lru")) {
 426             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 427         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 428             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 429         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 430             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 431         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 432             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 433         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 434             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 435         } else if (!strcasecmp(o->ptr,"noeviction")) {
 436             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 437         } else {
 438             goto badfmt;
 439         }
 440     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 441         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 442             ll <= 0) goto badfmt;
 443         server.maxmemory_samples = ll;
 444     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 445         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 446             ll < 0 || ll > LONG_MAX) goto badfmt;
 447         server.maxidletime = ll;
 448     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 449         if (!strcasecmp(o->ptr,"no")) {
 450             server.aof_fsync = AOF_FSYNC_NO;
 451         } else if (!strcasecmp(o->ptr,"everysec")) {
 452             server.aof_fsync = AOF_FSYNC_EVERYSEC;
 453         } else if (!strcasecmp(o->ptr,"always")) {
 454             server.aof_fsync = AOF_FSYNC_ALWAYS;
 455         } else {
 456             goto badfmt;
 457         }
 458     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 459         int yn = yesnotoi(o->ptr);
 460
 461         if (yn == -1) goto badfmt;
 462         server.aof_no_fsync_on_rewrite = yn;
 463     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 464         int enable = yesnotoi(o->ptr);
 465
 466         if (enable == -1) goto badfmt;
 467         if (enable == 0 && server.aof_state != REDIS_AOF_OFF) {
 468             stopAppendOnly();
 469         } else if (enable && server.aof_state == REDIS_AOF_OFF) {
 470             if (startAppendOnly() == REDIS_ERR) {
 471                 addReplyError(c,
 472                     "Unable to turn on AOF. Check server logs.");
 473                 return;
 474             }
 475         }
 476     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-percentage")) {
 477         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 478         server.aof_rewrite_perc = ll;
 479     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-min-size")) {
 480         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 481         server.aof_rewrite_min_size = ll;
 482     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 483         int vlen, j;
 484         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 485
 486         /* Perform sanity check before setting the new config:
 487          * - Even number of args
 488          * - Seconds >= 1, changes >= 0 */
 489         if (vlen & 1) {
 490             sdsfreesplitres(v,vlen);
 491             goto badfmt;
 492         }
 493         for (j = 0; j < vlen; j++) {
 494             char *eptr;
 495             long val;
 496
 497             val = strtoll(v[j], &eptr, 10);
 498             if (eptr[0] != '\0' ||
 499                 ((j & 1) == 0 && val < 1) ||
 500                 ((j & 1) == 1 && val < 0)) {
 501                 sdsfreesplitres(v,vlen);
 502                 goto badfmt;
 503             }
 504         }
 505         /* Finally set the new config */
 506         resetServerSaveParams();
 507         for (j = 0; j < vlen; j += 2) {
 508             time_t seconds;
 509             int changes;
 510
 511             seconds = strtoll(v[j],NULL,10);
 512             changes = strtoll(v[j+1],NULL,10);
 513             appendServerSaveParams(seconds, changes);
 514         }
 515         sdsfreesplitres(v,vlen);
 516     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 517         int yn = yesnotoi(o->ptr);
 518
 519         if (yn == -1) goto badfmt;
 520         server.repl_serve_stale_data = yn;
 521     } else if (!strcasecmp(c->argv[2]->ptr,"slave-read-only")) {
 522         int yn = yesnotoi(o->ptr);
 523
 524         if (yn == -1) goto badfmt;
 525         server.repl_slave_ro = yn;
 526     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 527         if (chdir((char*)o->ptr) == -1) {
 528             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 529             return;
 530         }
 531     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-entries")) {
 532         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 533         server.hash_max_ziplist_entries = ll;
 534     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-value")) {
 535         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 536         server.hash_max_ziplist_value = ll;
 537     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 538         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 539         server.list_max_ziplist_entries = ll;
 540     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 541         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 542         server.list_max_ziplist_value = ll;
 543     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 544         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 545         server.set_max_intset_entries = ll;
 546     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 547         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 548         server.zset_max_ziplist_entries = ll;
 549     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 550         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 551         server.zset_max_ziplist_value = ll;
 552     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
 553         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 554         server.lua_time_limit = ll;
 555     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-log-slower-than")) {
 556         if (getLongLongFromObject(o,&ll) == REDIS_ERR) goto badfmt;
 557         server.slowlog_log_slower_than = ll;
 558     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-max-len")) {
 559         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 560         server.slowlog_max_len = (unsigned)ll;
 561     } else if (!strcasecmp(c->argv[2]->ptr,"loglevel")) {
 562         if (!strcasecmp(o->ptr,"warning")) {
 563             server.verbosity = REDIS_WARNING;
 564         } else if (!strcasecmp(o->ptr,"notice")) {
 565             server.verbosity = REDIS_NOTICE;
 566         } else if (!strcasecmp(o->ptr,"verbose")) {
 567             server.verbosity = REDIS_VERBOSE;
 568         } else if (!strcasecmp(o->ptr,"debug")) {
 569             server.verbosity = REDIS_DEBUG;
 570         } else {
 571             goto badfmt;
 572         }
 573     } else if (!strcasecmp(c->argv[2]->ptr,"client-output-buffer-limit")) {
 574         int vlen, j;
 575         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 576
 577         /* We need a multiple of 4: <class> <hard> <soft> <soft_seconds> */
 578         if (vlen % 4) {
 579             sdsfreesplitres(v,vlen);
 580             goto badfmt;
 581         }
 582
 583         /* Sanity check of single arguments, so that we either refuse the
 584          * whole configuration string or accept it all, even if a single
 585          * error in a single client class is present. */
 586         for (j = 0; j < vlen; j++) {
 587             char *eptr;
 588             long val;
 589
 590             if ((j % 4) == 0) {
 591                 if (getClientLimitClassByName(v[j]) == -1) {
 592                     sdsfreesplitres(v,vlen);
 593                     goto badfmt;
 594                 }
 595             } else {
 596                 val = strtoll(v[j], &eptr, 10);
 597                 if (eptr[0] != '\0' || val < 0) {
 598                     sdsfreesplitres(v,vlen);
 599                     goto badfmt;
 600                 }
 601             }
 602         }
 603         /* Finally set the new config */
 604         for (j = 0; j < vlen; j += 4) {
 605             int class;
 606             unsigned long long hard, soft;
 607             int soft_seconds;
 608
 609             class = getClientLimitClassByName(v[j]);
 610             hard = strtoll(v[j+1],NULL,10);
 611             soft = strtoll(v[j+2],NULL,10);
 612             soft_seconds = strtoll(v[j+3],NULL,10);
 613
 614             server.client_obuf_limits[class].hard_limit_bytes = hard;
 615             server.client_obuf_limits[class].soft_limit_bytes = soft;
 616             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 617         }
 618         sdsfreesplitres(v,vlen);
 619     } else if (!strcasecmp(c->argv[2]->ptr,"stop-writes-on-bgsave-error")) {
 620         int yn = yesnotoi(o->ptr);
 621
 622         if (yn == -1) goto badfmt;
 623         server.stop_writes_on_bgsave_err = yn;
 624     } else if (!strcasecmp(c->argv[2]->ptr,"repl-ping-slave-period")) {
 625         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 626         server.repl_ping_slave_period = ll;
 627     } else if (!strcasecmp(c->argv[2]->ptr,"repl-timeout")) {
 628         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 629         server.repl_timeout = ll;
 630     } else if (!strcasecmp(c->argv[2]->ptr,"watchdog-period")) {
 631         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 632         if (ll)
 633             enableWatchdog(ll);
 634         else
 635             disableWatchdog();
 636     } else if (!strcasecmp(c->argv[2]->ptr,"rdbcompression")) {
 637         int yn = yesnotoi(o->ptr);
 638
 639         if (yn == -1) goto badfmt;
 640         server.rdb_compression = yn;
 641     } else if (!strcasecmp(c->argv[2]->ptr,"rdbchecksum")) {
 642         int yn = yesnotoi(o->ptr);
 643
 644         if (yn == -1) goto badfmt;
 645         server.rdb_checksum = yn;
 646     } else {
 647         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 648             (char*)c->argv[2]->ptr);
 649         return;
 650     }
 651     addReply(c,shared.ok);
 652     return;
 653
 654 badfmt: /* Bad format errors */
 655     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 656             (char*)o->ptr,
 657             (char*)c->argv[2]->ptr);
 658 }
 659
 660 #define config_get_string_field(_name,_var) do { \
 661     if (stringmatch(pattern,_name,0)) { \
 662         addReplyBulkCString(c,_name); \
 663         addReplyBulkCString(c,_var ? _var : ""); \
 664         matches++; \
 665     } \
 666 } while(0);
 667
 668 #define config_get_bool_field(_name,_var) do { \
 669     if (stringmatch(pattern,_name,0)) { \
 670         addReplyBulkCString(c,_name); \
 671         addReplyBulkCString(c,_var ? "yes" : "no"); \
 672         matches++; \
 673     } \
 674 } while(0);
 675
 676 #define config_get_numerical_field(_name,_var) do { \
 677     if (stringmatch(pattern,_name,0)) { \
 678         ll2string(buf,sizeof(buf),_var); \
 679         addReplyBulkCString(c,_name); \
 680         addReplyBulkCString(c,buf); \
 681         matches++; \
 682     } \
 683 } while(0);
 684
 685 void configGetCommand(redisClient *c) {
 686     robj *o = c->argv[2];
 687     void *replylen = addDeferredMultiBulkLength(c);
 688     char *pattern = o->ptr;
 689     char buf[128];
 690     int matches = 0;
 691     redisAssertWithInfo(c,o,o->encoding == REDIS_ENCODING_RAW);
 692
 693     /* String values */
 694     config_get_string_field("dbfilename",server.rdb_filename);
 695     config_get_string_field("requirepass",server.requirepass);
 696     config_get_string_field("masterauth",server.requirepass);
 697     config_get_string_field("bind",server.bindaddr);
 698     config_get_string_field("unixsocket",server.unixsocket);
 699     config_get_string_field("logfile",server.logfile);
 700     config_get_string_field("pidfile",server.pidfile);
 701
 702     /* Numerical values */
 703     config_get_numerical_field("maxmemory",server.maxmemory);
 704     config_get_numerical_field("maxmemory-samples",server.maxmemory_samples);
 705     config_get_numerical_field("timeout",server.maxidletime);
 706     config_get_numerical_field("auto-aof-rewrite-percentage",
 707             server.aof_rewrite_perc);
 708     config_get_numerical_field("auto-aof-rewrite-min-size",
 709             server.aof_rewrite_min_size);
 710     config_get_numerical_field("hash-max-ziplist-entries",
 711             server.hash_max_ziplist_entries);
 712     config_get_numerical_field("hash-max-ziplist-value",
 713             server.hash_max_ziplist_value);
 714     config_get_numerical_field("list-max-ziplist-entries",
 715             server.list_max_ziplist_entries);
 716     config_get_numerical_field("list-max-ziplist-value",
 717             server.list_max_ziplist_value);
 718     config_get_numerical_field("set-max-intset-entries",
 719             server.set_max_intset_entries);
 720     config_get_numerical_field("zset-max-ziplist-entries",
 721             server.zset_max_ziplist_entries);
 722     config_get_numerical_field("zset-max-ziplist-value",
 723             server.zset_max_ziplist_value);
 724     config_get_numerical_field("lua-time-limit",server.lua_time_limit);
 725     config_get_numerical_field("slowlog-log-slower-than",
 726             server.slowlog_log_slower_than);
 727     config_get_numerical_field("slowlog-max-len",
 728             server.slowlog_max_len);
 729     config_get_numerical_field("port",server.port);
 730     config_get_numerical_field("databases",server.dbnum);
 731     config_get_numerical_field("repl-ping-slave-period",server.repl_ping_slave_period);
 732     config_get_numerical_field("repl-timeout",server.repl_timeout);
 733     config_get_numerical_field("maxclients",server.maxclients);
 734     config_get_numerical_field("watchdog-period",server.watchdog_period);
 735
 736     /* Bool (yes/no) values */
 737     config_get_bool_field("no-appendfsync-on-rewrite",
 738             server.aof_no_fsync_on_rewrite);
 739     config_get_bool_field("slave-serve-stale-data",
 740             server.repl_serve_stale_data);
 741     config_get_bool_field("slave-read-only",
 742             server.repl_slave_ro);
 743     config_get_bool_field("stop-writes-on-bgsave-error",
 744             server.stop_writes_on_bgsave_err);
 745     config_get_bool_field("daemonize", server.daemonize);
 746     config_get_bool_field("rdbcompression", server.rdb_compression);
 747     config_get_bool_field("rdbchecksum", server.rdb_checksum);
 748     config_get_bool_field("activerehashing", server.activerehashing);
 749
 750     /* Everything we can't handle with macros follows. */
 751
 752     if (stringmatch(pattern,"appendonly",0)) {
 753         addReplyBulkCString(c,"appendonly");
 754         addReplyBulkCString(c,server.aof_state == REDIS_AOF_OFF ? "no" : "yes");
 755         matches++;
 756     }
 757     if (stringmatch(pattern,"dir",0)) {
 758         char buf[1024];
 759
 760         if (getcwd(buf,sizeof(buf)) == NULL)
 761             buf[0] = '\0';
 762
 763         addReplyBulkCString(c,"dir");
 764         addReplyBulkCString(c,buf);
 765         matches++;
 766     }
 767     if (stringmatch(pattern,"maxmemory-policy",0)) {
 768         char *s;
 769
 770         switch(server.maxmemory_policy) {
 771         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 772         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 773         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 774         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 775         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 776         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 777         default: s = "unknown"; break; /* too harmless to panic */
 778         }
 779         addReplyBulkCString(c,"maxmemory-policy");
 780         addReplyBulkCString(c,s);
 781         matches++;
 782     }
 783     if (stringmatch(pattern,"appendfsync",0)) {
 784         char *policy;
 785
 786         switch(server.aof_fsync) {
 787         case AOF_FSYNC_NO: policy = "no"; break;
 788         case AOF_FSYNC_EVERYSEC: policy = "everysec"; break;
 789         case AOF_FSYNC_ALWAYS: policy = "always"; break;
 790         default: policy = "unknown"; break; /* too harmless to panic */
 791         }
 792         addReplyBulkCString(c,"appendfsync");
 793         addReplyBulkCString(c,policy);
 794         matches++;
 795     }
 796     if (stringmatch(pattern,"save",0)) {
 797         sds buf = sdsempty();
 798         int j;
 799
 800         for (j = 0; j < server.saveparamslen; j++) {
 801             buf = sdscatprintf(buf,"%ld %d",
 802                     server.saveparams[j].seconds,
 803                     server.saveparams[j].changes);
 804             if (j != server.saveparamslen-1)
 805                 buf = sdscatlen(buf," ",1);
 806         }
 807         addReplyBulkCString(c,"save");
 808         addReplyBulkCString(c,buf);
 809         sdsfree(buf);
 810         matches++;
 811     }
 812     if (stringmatch(pattern,"loglevel",0)) {
 813         char *s;
 814
 815         switch(server.verbosity) {
 816         case REDIS_WARNING: s = "warning"; break;
 817         case REDIS_VERBOSE: s = "verbose"; break;
 818         case REDIS_NOTICE: s = "notice"; break;
 819         case REDIS_DEBUG: s = "debug"; break;
 820         default: s = "unknown"; break; /* too harmless to panic */
 821         }
 822         addReplyBulkCString(c,"loglevel");
 823         addReplyBulkCString(c,s);
 824         matches++;
 825     }
 826     if (stringmatch(pattern,"client-output-buffer-limit",0)) {
 827         sds buf = sdsempty();
 828         int j;
 829
 830         for (j = 0; j < REDIS_CLIENT_LIMIT_NUM_CLASSES; j++) {
 831             buf = sdscatprintf(buf,"%s %llu %llu %ld",
 832                     getClientLimitClassName(j),
 833                     server.client_obuf_limits[j].hard_limit_bytes,
 834                     server.client_obuf_limits[j].soft_limit_bytes,
 835                     (long) server.client_obuf_limits[j].soft_limit_seconds);
 836             if (j != REDIS_CLIENT_LIMIT_NUM_CLASSES-1)
 837                 buf = sdscatlen(buf," ",1);
 838         }
 839         addReplyBulkCString(c,"client-output-buffer-limit");
 840         addReplyBulkCString(c,buf);
 841         sdsfree(buf);
 842         matches++;
 843     }
 844     if (stringmatch(pattern,"unixsocketperm",0)) {
 845         char buf[32];
 846         snprintf(buf,sizeof(buf),"%o",server.unixsocketperm);
 847         addReplyBulkCString(c,"unixsocketperm");
 848         addReplyBulkCString(c,buf);
 849         matches++;
 850     }
 851     if (stringmatch(pattern,"slaveof",0)) {
 852         char buf[256];
 853
 854         addReplyBulkCString(c,"slaveof");
 855         if (server.masterhost)
 856             snprintf(buf,sizeof(buf),"%s %d",
 857                 server.masterhost, server.masterport);
 858         else
 859             buf[0] = '\0';
 860         addReplyBulkCString(c,buf);
 861         matches++;
 862     }
 863     setDeferredMultiBulkLength(c,replylen,matches*2);
 864 }
 865
 866 void configCommand(redisClient *c) {
 867     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 868         if (c->argc != 4) goto badarity;
 869         configSetCommand(c);
 870     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 871         if (c->argc != 3) goto badarity;
 872         configGetCommand(c);
 873     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 874         if (c->argc != 2) goto badarity;
 875         server.stat_keyspace_hits = 0;
 876         server.stat_keyspace_misses = 0;
 877         server.stat_numcommands = 0;
 878         server.stat_numconnections = 0;
 879         server.stat_expiredkeys = 0;
 880         server.stat_rejected_conn = 0;
 881         server.stat_fork_time = 0;
 882         server.aof_delayed_fsync = 0;
 883         resetCommandTableStats();
 884         addReply(c,shared.ok);
 885     } else {
 886         addReplyError(c,
 887             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 888     }
 889     return;
 890
 891 badarity:
 892     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 893         (char*) c->argv[1]->ptr);
 894 }