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             if (strlen(argv[1]) > REDIS_AUTHPASS_MAX_LEN) {
 268                 err = "Password is longer than REDIS_AUTHPASS_MAX_LEN";
 269                 goto loaderr;
 270             }
 271             server.requirepass = zstrdup(argv[1]);
 272         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 273             zfree(server.pidfile);
 274             server.pidfile = zstrdup(argv[1]);
 275         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 276             zfree(server.rdb_filename);
 277             server.rdb_filename = zstrdup(argv[1]);
 278         } else if (!strcasecmp(argv[0],"hash-max-ziplist-entries") && argc == 2) {
 279             server.hash_max_ziplist_entries = memtoll(argv[1], NULL);
 280         } else if (!strcasecmp(argv[0],"hash-max-ziplist-value") && argc == 2) {
 281             server.hash_max_ziplist_value = memtoll(argv[1], NULL);
 282         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 283             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 284         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
 285             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 286         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2) {
 287             server.set_max_intset_entries = memtoll(argv[1], NULL);
 288         } else if (!strcasecmp(argv[0],"zset-max-ziplist-entries") && argc == 2) {
 289             server.zset_max_ziplist_entries = memtoll(argv[1], NULL);
 290         } else if (!strcasecmp(argv[0],"zset-max-ziplist-value") && argc == 2) {
 291             server.zset_max_ziplist_value = memtoll(argv[1], NULL);
 292         } else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
 293             struct redisCommand *cmd = lookupCommand(argv[1]);
 294             int retval;
 295
 296             if (!cmd) {
 297                 err = "No such command in rename-command";
 298                 goto loaderr;
 299             }
 300
 301             /* If the target command name is the emtpy string we just
 302              * remove it from the command table. */
 303             retval = dictDelete(server.commands, argv[1]);
 304             redisAssert(retval == DICT_OK);
 305
 306             /* Otherwise we re-add the command under a different name. */
 307             if (sdslen(argv[2]) != 0) {
 308                 sds copy = sdsdup(argv[2]);
 309
 310                 retval = dictAdd(server.commands, copy, cmd);
 311                 if (retval != DICT_OK) {
 312                     sdsfree(copy);
 313                     err = "Target command name already exists"; goto loaderr;
 314                 }
 315             }
 316         } else if (!strcasecmp(argv[0],"cluster-enabled") && argc == 2) {
 317             if ((server.cluster_enabled = yesnotoi(argv[1])) == -1) {
 318                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 319             }
 320         } else if (!strcasecmp(argv[0],"cluster-config-file") && argc == 2) {
 321             zfree(server.cluster.configfile);
 322             server.cluster.configfile = zstrdup(argv[1]);
 323         } else if (!strcasecmp(argv[0],"lua-time-limit") && argc == 2) {
 324             server.lua_time_limit = strtoll(argv[1],NULL,10);
 325         } else if (!strcasecmp(argv[0],"slowlog-log-slower-than") &&
 326                    argc == 2)
 327         {
 328             server.slowlog_log_slower_than = strtoll(argv[1],NULL,10);
 329         } else if (!strcasecmp(argv[0],"slowlog-max-len") && argc == 2) {
 330             server.slowlog_max_len = strtoll(argv[1],NULL,10);
 331         } else if (!strcasecmp(argv[0],"client-output-buffer-limit") &&
 332                    argc == 5)
 333         {
 334             int class = getClientLimitClassByName(argv[1]);
 335             unsigned long long hard, soft;
 336             int soft_seconds;
 337
 338             if (class == -1) {
 339                 err = "Unrecognized client limit class";
 340                 goto loaderr;
 341             }
 342             hard = memtoll(argv[2],NULL);
 343             soft = memtoll(argv[3],NULL);
 344             soft_seconds = atoi(argv[4]);
 345             if (soft_seconds < 0) {
 346                 err = "Negative number of seconds in soft limt is invalid";
 347                 goto loaderr;
 348             }
 349             server.client_obuf_limits[class].hard_limit_bytes = hard;
 350             server.client_obuf_limits[class].soft_limit_bytes = soft;
 351             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 352         } else if (!strcasecmp(argv[0],"stop-writes-on-bgsave-error") &&
 353                    argc == 2) {
 354             if ((server.stop_writes_on_bgsave_err = yesnotoi(argv[1])) == -1) {
 355                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 356             }
 357         } else if (!strcasecmp(argv[0],"slave-priority") && argc == 2) {
 358             server.slave_priority = atoi(argv[1]);
 359         } else if (!strcasecmp(argv[0],"sentinel")) {
 360             /* argc == 1 is handled by main() as we need to enter the sentinel
 361              * mode ASAP. */
 362             if (argc != 1) {
 363                 if (!server.sentinel_mode) {
 364                     err = "sentinel directive while not in sentinel mode";
 365                     goto loaderr;
 366                 }
 367                 err = sentinelHandleConfiguration(argv+1,argc-1);
 368                 if (err) goto loaderr;
 369             }
 370         } else {
 371             err = "Bad directive or wrong number of arguments"; goto loaderr;
 372         }
 373         sdsfreesplitres(argv,argc);
 374     }
 375     sdsfreesplitres(lines,totlines);
 376     return;
 377
 378 loaderr:
 379     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 380     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 381     fprintf(stderr, ">>> '%s'\n", lines[i]);
 382     fprintf(stderr, "%s\n", err);
 383     exit(1);
 384 }
 385
 386 /* Load the server configuration from the specified filename.
 387  * The function appends the additional configuration directives stored
 388  * in the 'options' string to the config file before loading.
 389  *
 390  * Both filename and options can be NULL, in such a case are considered
 391  * emtpy. This way loadServerConfig can be used to just load a file or
 392  * just load a string. */
 393 void loadServerConfig(char *filename, char *options) {
 394     sds config = sdsempty();
 395     char buf[REDIS_CONFIGLINE_MAX+1];
 396
 397     /* Load the file content */
 398     if (filename) {
 399         FILE *fp;
 400
 401         if (filename[0] == '-' && filename[1] == '\0') {
 402             fp = stdin;
 403         } else {
 404             if ((fp = fopen(filename,"r")) == NULL) {
 405                 redisLog(REDIS_WARNING,
 406                     "Fatal error, can't open config file '%s'", filename);
 407                 exit(1);
 408             }
 409         }
 410         while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL)
 411             config = sdscat(config,buf);
 412         if (fp != stdin) fclose(fp);
 413     }
 414     /* Append the additional options */
 415     if (options) {
 416         config = sdscat(config,"\n");
 417         config = sdscat(config,options);
 418     }
 419     loadServerConfigFromString(config);
 420     sdsfree(config);
 421 }
 422
 423 /*-----------------------------------------------------------------------------
 424  * CONFIG command for remote configuration
 425  *----------------------------------------------------------------------------*/
 426
 427 void configSetCommand(redisClient *c) {
 428     robj *o;
 429     long long ll;
 430     redisAssertWithInfo(c,c->argv[2],c->argv[2]->encoding == REDIS_ENCODING_RAW);
 431     redisAssertWithInfo(c,c->argv[2],c->argv[3]->encoding == REDIS_ENCODING_RAW);
 432     o = c->argv[3];
 433
 434     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 435         zfree(server.rdb_filename);
 436         server.rdb_filename = zstrdup(o->ptr);
 437     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 438         if (sdslen(o->ptr) > REDIS_AUTHPASS_MAX_LEN) goto badfmt;
 439         zfree(server.requirepass);
 440         server.requirepass = ((char*)o->ptr)[0] ? zstrdup(o->ptr) : NULL;
 441     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 442         zfree(server.masterauth);
 443         server.masterauth = zstrdup(o->ptr);
 444     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 445         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 446             ll < 0) goto badfmt;
 447         server.maxmemory = ll;
 448         if (server.maxmemory) freeMemoryIfNeeded();
 449     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 450         if (!strcasecmp(o->ptr,"volatile-lru")) {
 451             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 452         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 453             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 454         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 455             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 456         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 457             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 458         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 459             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 460         } else if (!strcasecmp(o->ptr,"noeviction")) {
 461             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 462         } else {
 463             goto badfmt;
 464         }
 465     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 466         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 467             ll <= 0) goto badfmt;
 468         server.maxmemory_samples = ll;
 469     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 470         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 471             ll < 0 || ll > LONG_MAX) goto badfmt;
 472         server.maxidletime = ll;
 473     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 474         if (!strcasecmp(o->ptr,"no")) {
 475             server.aof_fsync = AOF_FSYNC_NO;
 476         } else if (!strcasecmp(o->ptr,"everysec")) {
 477             server.aof_fsync = AOF_FSYNC_EVERYSEC;
 478         } else if (!strcasecmp(o->ptr,"always")) {
 479             server.aof_fsync = AOF_FSYNC_ALWAYS;
 480         } else {
 481             goto badfmt;
 482         }
 483     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 484         int yn = yesnotoi(o->ptr);
 485
 486         if (yn == -1) goto badfmt;
 487         server.aof_no_fsync_on_rewrite = yn;
 488     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 489         int enable = yesnotoi(o->ptr);
 490
 491         if (enable == -1) goto badfmt;
 492         if (enable == 0 && server.aof_state != REDIS_AOF_OFF) {
 493             stopAppendOnly();
 494         } else if (enable && server.aof_state == REDIS_AOF_OFF) {
 495             if (startAppendOnly() == REDIS_ERR) {
 496                 addReplyError(c,
 497                     "Unable to turn on AOF. Check server logs.");
 498                 return;
 499             }
 500         }
 501     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-percentage")) {
 502         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 503         server.aof_rewrite_perc = ll;
 504     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-min-size")) {
 505         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 506         server.aof_rewrite_min_size = ll;
 507     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 508         int vlen, j;
 509         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 510
 511         /* Perform sanity check before setting the new config:
 512          * - Even number of args
 513          * - Seconds >= 1, changes >= 0 */
 514         if (vlen & 1) {
 515             sdsfreesplitres(v,vlen);
 516             goto badfmt;
 517         }
 518         for (j = 0; j < vlen; j++) {
 519             char *eptr;
 520             long val;
 521
 522             val = strtoll(v[j], &eptr, 10);
 523             if (eptr[0] != '\0' ||
 524                 ((j & 1) == 0 && val < 1) ||
 525                 ((j & 1) == 1 && val < 0)) {
 526                 sdsfreesplitres(v,vlen);
 527                 goto badfmt;
 528             }
 529         }
 530         /* Finally set the new config */
 531         resetServerSaveParams();
 532         for (j = 0; j < vlen; j += 2) {
 533             time_t seconds;
 534             int changes;
 535
 536             seconds = strtoll(v[j],NULL,10);
 537             changes = strtoll(v[j+1],NULL,10);
 538             appendServerSaveParams(seconds, changes);
 539         }
 540         sdsfreesplitres(v,vlen);
 541     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 542         int yn = yesnotoi(o->ptr);
 543
 544         if (yn == -1) goto badfmt;
 545         server.repl_serve_stale_data = yn;
 546     } else if (!strcasecmp(c->argv[2]->ptr,"slave-read-only")) {
 547         int yn = yesnotoi(o->ptr);
 548
 549         if (yn == -1) goto badfmt;
 550         server.repl_slave_ro = yn;
 551     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 552         if (chdir((char*)o->ptr) == -1) {
 553             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 554             return;
 555         }
 556     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-entries")) {
 557         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 558         server.hash_max_ziplist_entries = ll;
 559     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-value")) {
 560         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 561         server.hash_max_ziplist_value = ll;
 562     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 563         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 564         server.list_max_ziplist_entries = ll;
 565     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 566         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 567         server.list_max_ziplist_value = ll;
 568     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 569         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 570         server.set_max_intset_entries = ll;
 571     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 572         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 573         server.zset_max_ziplist_entries = ll;
 574     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 575         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 576         server.zset_max_ziplist_value = ll;
 577     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
 578         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 579         server.lua_time_limit = ll;
 580     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-log-slower-than")) {
 581         if (getLongLongFromObject(o,&ll) == REDIS_ERR) goto badfmt;
 582         server.slowlog_log_slower_than = ll;
 583     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-max-len")) {
 584         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 585         server.slowlog_max_len = (unsigned)ll;
 586     } else if (!strcasecmp(c->argv[2]->ptr,"loglevel")) {
 587         if (!strcasecmp(o->ptr,"warning")) {
 588             server.verbosity = REDIS_WARNING;
 589         } else if (!strcasecmp(o->ptr,"notice")) {
 590             server.verbosity = REDIS_NOTICE;
 591         } else if (!strcasecmp(o->ptr,"verbose")) {
 592             server.verbosity = REDIS_VERBOSE;
 593         } else if (!strcasecmp(o->ptr,"debug")) {
 594             server.verbosity = REDIS_DEBUG;
 595         } else {
 596             goto badfmt;
 597         }
 598     } else if (!strcasecmp(c->argv[2]->ptr,"client-output-buffer-limit")) {
 599         int vlen, j;
 600         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 601
 602         /* We need a multiple of 4: <class> <hard> <soft> <soft_seconds> */
 603         if (vlen % 4) {
 604             sdsfreesplitres(v,vlen);
 605             goto badfmt;
 606         }
 607
 608         /* Sanity check of single arguments, so that we either refuse the
 609          * whole configuration string or accept it all, even if a single
 610          * error in a single client class is present. */
 611         for (j = 0; j < vlen; j++) {
 612             char *eptr;
 613             long val;
 614
 615             if ((j % 4) == 0) {
 616                 if (getClientLimitClassByName(v[j]) == -1) {
 617                     sdsfreesplitres(v,vlen);
 618                     goto badfmt;
 619                 }
 620             } else {
 621                 val = strtoll(v[j], &eptr, 10);
 622                 if (eptr[0] != '\0' || val < 0) {
 623                     sdsfreesplitres(v,vlen);
 624                     goto badfmt;
 625                 }
 626             }
 627         }
 628         /* Finally set the new config */
 629         for (j = 0; j < vlen; j += 4) {
 630             int class;
 631             unsigned long long hard, soft;
 632             int soft_seconds;
 633
 634             class = getClientLimitClassByName(v[j]);
 635             hard = strtoll(v[j+1],NULL,10);
 636             soft = strtoll(v[j+2],NULL,10);
 637             soft_seconds = strtoll(v[j+3],NULL,10);
 638
 639             server.client_obuf_limits[class].hard_limit_bytes = hard;
 640             server.client_obuf_limits[class].soft_limit_bytes = soft;
 641             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 642         }
 643         sdsfreesplitres(v,vlen);
 644     } else if (!strcasecmp(c->argv[2]->ptr,"stop-writes-on-bgsave-error")) {
 645         int yn = yesnotoi(o->ptr);
 646
 647         if (yn == -1) goto badfmt;
 648         server.stop_writes_on_bgsave_err = yn;
 649     } else if (!strcasecmp(c->argv[2]->ptr,"repl-ping-slave-period")) {
 650         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 651         server.repl_ping_slave_period = ll;
 652     } else if (!strcasecmp(c->argv[2]->ptr,"repl-timeout")) {
 653         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 654         server.repl_timeout = ll;
 655     } else if (!strcasecmp(c->argv[2]->ptr,"watchdog-period")) {
 656         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 657         if (ll)
 658             enableWatchdog(ll);
 659         else
 660             disableWatchdog();
 661     } else if (!strcasecmp(c->argv[2]->ptr,"rdbcompression")) {
 662         int yn = yesnotoi(o->ptr);
 663
 664         if (yn == -1) goto badfmt;
 665         server.rdb_compression = yn;
 666     } else if (!strcasecmp(c->argv[2]->ptr,"rdbchecksum")) {
 667         int yn = yesnotoi(o->ptr);
 668
 669         if (yn == -1) goto badfmt;
 670         server.rdb_checksum = yn;
 671     } else if (!strcasecmp(c->argv[2]->ptr,"slave-priority")) {
 672         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 673             ll <= 0) goto badfmt;
 674         server.slave_priority = ll;
 675     } else {
 676         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 677             (char*)c->argv[2]->ptr);
 678         return;
 679     }
 680     addReply(c,shared.ok);
 681     return;
 682
 683 badfmt: /* Bad format errors */
 684     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 685             (char*)o->ptr,
 686             (char*)c->argv[2]->ptr);
 687 }
 688
 689 #define config_get_string_field(_name,_var) do { \
 690     if (stringmatch(pattern,_name,0)) { \
 691         addReplyBulkCString(c,_name); \
 692         addReplyBulkCString(c,_var ? _var : ""); \
 693         matches++; \
 694     } \
 695 } while(0);
 696
 697 #define config_get_bool_field(_name,_var) do { \
 698     if (stringmatch(pattern,_name,0)) { \
 699         addReplyBulkCString(c,_name); \
 700         addReplyBulkCString(c,_var ? "yes" : "no"); \
 701         matches++; \
 702     } \
 703 } while(0);
 704
 705 #define config_get_numerical_field(_name,_var) do { \
 706     if (stringmatch(pattern,_name,0)) { \
 707         ll2string(buf,sizeof(buf),_var); \
 708         addReplyBulkCString(c,_name); \
 709         addReplyBulkCString(c,buf); \
 710         matches++; \
 711     } \
 712 } while(0);
 713
 714 void configGetCommand(redisClient *c) {
 715     robj *o = c->argv[2];
 716     void *replylen = addDeferredMultiBulkLength(c);
 717     char *pattern = o->ptr;
 718     char buf[128];
 719     int matches = 0;
 720     redisAssertWithInfo(c,o,o->encoding == REDIS_ENCODING_RAW);
 721
 722     /* String values */
 723     config_get_string_field("dbfilename",server.rdb_filename);
 724     config_get_string_field("requirepass",server.requirepass);
 725     config_get_string_field("masterauth",server.requirepass);
 726     config_get_string_field("bind",server.bindaddr);
 727     config_get_string_field("unixsocket",server.unixsocket);
 728     config_get_string_field("logfile",server.logfile);
 729     config_get_string_field("pidfile",server.pidfile);
 730
 731     /* Numerical values */
 732     config_get_numerical_field("maxmemory",server.maxmemory);
 733     config_get_numerical_field("maxmemory-samples",server.maxmemory_samples);
 734     config_get_numerical_field("timeout",server.maxidletime);
 735     config_get_numerical_field("auto-aof-rewrite-percentage",
 736             server.aof_rewrite_perc);
 737     config_get_numerical_field("auto-aof-rewrite-min-size",
 738             server.aof_rewrite_min_size);
 739     config_get_numerical_field("hash-max-ziplist-entries",
 740             server.hash_max_ziplist_entries);
 741     config_get_numerical_field("hash-max-ziplist-value",
 742             server.hash_max_ziplist_value);
 743     config_get_numerical_field("list-max-ziplist-entries",
 744             server.list_max_ziplist_entries);
 745     config_get_numerical_field("list-max-ziplist-value",
 746             server.list_max_ziplist_value);
 747     config_get_numerical_field("set-max-intset-entries",
 748             server.set_max_intset_entries);
 749     config_get_numerical_field("zset-max-ziplist-entries",
 750             server.zset_max_ziplist_entries);
 751     config_get_numerical_field("zset-max-ziplist-value",
 752             server.zset_max_ziplist_value);
 753     config_get_numerical_field("lua-time-limit",server.lua_time_limit);
 754     config_get_numerical_field("slowlog-log-slower-than",
 755             server.slowlog_log_slower_than);
 756     config_get_numerical_field("slowlog-max-len",
 757             server.slowlog_max_len);
 758     config_get_numerical_field("port",server.port);
 759     config_get_numerical_field("databases",server.dbnum);
 760     config_get_numerical_field("repl-ping-slave-period",server.repl_ping_slave_period);
 761     config_get_numerical_field("repl-timeout",server.repl_timeout);
 762     config_get_numerical_field("maxclients",server.maxclients);
 763     config_get_numerical_field("watchdog-period",server.watchdog_period);
 764     config_get_numerical_field("slave-priority",server.slave_priority);
 765
 766     /* Bool (yes/no) values */
 767     config_get_bool_field("no-appendfsync-on-rewrite",
 768             server.aof_no_fsync_on_rewrite);
 769     config_get_bool_field("slave-serve-stale-data",
 770             server.repl_serve_stale_data);
 771     config_get_bool_field("slave-read-only",
 772             server.repl_slave_ro);
 773     config_get_bool_field("stop-writes-on-bgsave-error",
 774             server.stop_writes_on_bgsave_err);
 775     config_get_bool_field("daemonize", server.daemonize);
 776     config_get_bool_field("rdbcompression", server.rdb_compression);
 777     config_get_bool_field("rdbchecksum", server.rdb_checksum);
 778     config_get_bool_field("activerehashing", server.activerehashing);
 779
 780     /* Everything we can't handle with macros follows. */
 781
 782     if (stringmatch(pattern,"appendonly",0)) {
 783         addReplyBulkCString(c,"appendonly");
 784         addReplyBulkCString(c,server.aof_state == REDIS_AOF_OFF ? "no" : "yes");
 785         matches++;
 786     }
 787     if (stringmatch(pattern,"dir",0)) {
 788         char buf[1024];
 789
 790         if (getcwd(buf,sizeof(buf)) == NULL)
 791             buf[0] = '\0';
 792
 793         addReplyBulkCString(c,"dir");
 794         addReplyBulkCString(c,buf);
 795         matches++;
 796     }
 797     if (stringmatch(pattern,"maxmemory-policy",0)) {
 798         char *s;
 799
 800         switch(server.maxmemory_policy) {
 801         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 802         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 803         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 804         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 805         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 806         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 807         default: s = "unknown"; break; /* too harmless to panic */
 808         }
 809         addReplyBulkCString(c,"maxmemory-policy");
 810         addReplyBulkCString(c,s);
 811         matches++;
 812     }
 813     if (stringmatch(pattern,"appendfsync",0)) {
 814         char *policy;
 815
 816         switch(server.aof_fsync) {
 817         case AOF_FSYNC_NO: policy = "no"; break;
 818         case AOF_FSYNC_EVERYSEC: policy = "everysec"; break;
 819         case AOF_FSYNC_ALWAYS: policy = "always"; break;
 820         default: policy = "unknown"; break; /* too harmless to panic */
 821         }
 822         addReplyBulkCString(c,"appendfsync");
 823         addReplyBulkCString(c,policy);
 824         matches++;
 825     }
 826     if (stringmatch(pattern,"save",0)) {
 827         sds buf = sdsempty();
 828         int j;
 829
 830         for (j = 0; j < server.saveparamslen; j++) {
 831             buf = sdscatprintf(buf,"%ld %d",
 832                     server.saveparams[j].seconds,
 833                     server.saveparams[j].changes);
 834             if (j != server.saveparamslen-1)
 835                 buf = sdscatlen(buf," ",1);
 836         }
 837         addReplyBulkCString(c,"save");
 838         addReplyBulkCString(c,buf);
 839         sdsfree(buf);
 840         matches++;
 841     }
 842     if (stringmatch(pattern,"loglevel",0)) {
 843         char *s;
 844
 845         switch(server.verbosity) {
 846         case REDIS_WARNING: s = "warning"; break;
 847         case REDIS_VERBOSE: s = "verbose"; break;
 848         case REDIS_NOTICE: s = "notice"; break;
 849         case REDIS_DEBUG: s = "debug"; break;
 850         default: s = "unknown"; break; /* too harmless to panic */
 851         }
 852         addReplyBulkCString(c,"loglevel");
 853         addReplyBulkCString(c,s);
 854         matches++;
 855     }
 856     if (stringmatch(pattern,"client-output-buffer-limit",0)) {
 857         sds buf = sdsempty();
 858         int j;
 859
 860         for (j = 0; j < REDIS_CLIENT_LIMIT_NUM_CLASSES; j++) {
 861             buf = sdscatprintf(buf,"%s %llu %llu %ld",
 862                     getClientLimitClassName(j),
 863                     server.client_obuf_limits[j].hard_limit_bytes,
 864                     server.client_obuf_limits[j].soft_limit_bytes,
 865                     (long) server.client_obuf_limits[j].soft_limit_seconds);
 866             if (j != REDIS_CLIENT_LIMIT_NUM_CLASSES-1)
 867                 buf = sdscatlen(buf," ",1);
 868         }
 869         addReplyBulkCString(c,"client-output-buffer-limit");
 870         addReplyBulkCString(c,buf);
 871         sdsfree(buf);
 872         matches++;
 873     }
 874     if (stringmatch(pattern,"unixsocketperm",0)) {
 875         char buf[32];
 876         snprintf(buf,sizeof(buf),"%o",server.unixsocketperm);
 877         addReplyBulkCString(c,"unixsocketperm");
 878         addReplyBulkCString(c,buf);
 879         matches++;
 880     }
 881     if (stringmatch(pattern,"slaveof",0)) {
 882         char buf[256];
 883
 884         addReplyBulkCString(c,"slaveof");
 885         if (server.masterhost)
 886             snprintf(buf,sizeof(buf),"%s %d",
 887                 server.masterhost, server.masterport);
 888         else
 889             buf[0] = '\0';
 890         addReplyBulkCString(c,buf);
 891         matches++;
 892     }
 893     setDeferredMultiBulkLength(c,replylen,matches*2);
 894 }
 895
 896 void configCommand(redisClient *c) {
 897     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 898         if (c->argc != 4) goto badarity;
 899         configSetCommand(c);
 900     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 901         if (c->argc != 3) goto badarity;
 902         configGetCommand(c);
 903     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 904         if (c->argc != 2) goto badarity;
 905         server.stat_keyspace_hits = 0;
 906         server.stat_keyspace_misses = 0;
 907         server.stat_numcommands = 0;
 908         server.stat_numconnections = 0;
 909         server.stat_expiredkeys = 0;
 910         server.stat_rejected_conn = 0;
 911         server.stat_fork_time = 0;
 912         server.aof_delayed_fsync = 0;
 913         resetCommandTableStats();
 914         addReply(c,shared.ok);
 915     } else {
 916         addReplyError(c,
 917             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 918     }
 919     return;
 920
 921 badarity:
 922     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 923         (char*) c->argv[1]->ptr);
 924 }