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