src/config.c

   1 #include "redis.h"
   2
   3 /*-----------------------------------------------------------------------------
   4  * Config file parsing
   5  *----------------------------------------------------------------------------*/
   6
   7 int yesnotoi(char *s) {
   8     if (!strcasecmp(s,"yes")) return 1;
   9     else if (!strcasecmp(s,"no")) return 0;
  10     else return -1;
  11 }
  12
  13 void appendServerSaveParams(time_t seconds, int changes) {
  14     server.saveparams = zrealloc(server.saveparams,sizeof(struct saveparam)*(server.saveparamslen+1));
  15     server.saveparams[server.saveparamslen].seconds = seconds;
  16     server.saveparams[server.saveparamslen].changes = changes;
  17     server.saveparamslen++;
  18 }
  19
  20 void resetServerSaveParams() {
  21     zfree(server.saveparams);
  22     server.saveparams = NULL;
  23     server.saveparamslen = 0;
  24 }
  25
  26 void loadServerConfigFromString(char *config) {
  27     char *err = NULL;
  28     int linenum = 0, totlines, i;
  29     sds *lines;
  30
  31     lines = sdssplitlen(config,strlen(config),"\n",1,&totlines);
  32
  33     for (i = 0; i < totlines; i++) {
  34         sds *argv;
  35         int argc;
  36
  37         linenum = i+1;
  38         lines[i] = sdstrim(lines[i]," \t\r\n");
  39
  40         /* Skip comments and blank lines*/
  41         if (lines[i][0] == '#' || lines[i][0] == '\0') continue;
  42
  43         /* Split into arguments */
  44         argv = sdssplitargs(lines[i],&argc);
  45         sdstolower(argv[0]);
  46
  47         /* Execute config directives */
  48         if (!strcasecmp(argv[0],"timeout") && argc == 2) {
  49             server.maxidletime = atoi(argv[1]);
  50             if (server.maxidletime < 0) {
  51                 err = "Invalid timeout value"; goto loaderr;
  52             }
  53         } else if (!strcasecmp(argv[0],"port") && argc == 2) {
  54             server.port = atoi(argv[1]);
  55             if (server.port < 0 || server.port > 65535) {
  56                 err = "Invalid port"; goto loaderr;
  57             }
  58         } else if (!strcasecmp(argv[0],"bind") && argc == 2) {
  59             server.bindaddr = zstrdup(argv[1]);
  60         } else if (!strcasecmp(argv[0],"unixsocket") && argc == 2) {
  61             server.unixsocket = zstrdup(argv[1]);
  62         } else if (!strcasecmp(argv[0],"unixsocketperm") && argc == 2) {
  63             errno = 0;
  64             server.unixsocketperm = (mode_t)strtol(argv[1], NULL, 8);
  65             if (errno || server.unixsocketperm > 0777) {
  66                 err = "Invalid socket file permissions"; goto loaderr;
  67             }
  68         } else if (!strcasecmp(argv[0],"save")) {
  69             if (argc == 3) {
  70                 int seconds = atoi(argv[1]);
  71                 int changes = atoi(argv[2]);
  72                 if (seconds < 1 || changes < 0) {
  73                     err = "Invalid save parameters"; goto loaderr;
  74                 }
  75                 appendServerSaveParams(seconds,changes);
  76             } else if (argc == 2 && !strcasecmp(argv[1],"")) {
  77                 resetServerSaveParams();
  78             }
  79         } else if (!strcasecmp(argv[0],"dir") && argc == 2) {
  80             if (chdir(argv[1]) == -1) {
  81                 redisLog(REDIS_WARNING,"Can't chdir to '%s': %s",
  82                     argv[1], strerror(errno));
  83                 exit(1);
  84             }
  85         } else if (!strcasecmp(argv[0],"loglevel") && argc == 2) {
  86             if (!strcasecmp(argv[1],"debug")) server.verbosity = REDIS_DEBUG;
  87             else if (!strcasecmp(argv[1],"verbose")) server.verbosity = REDIS_VERBOSE;
  88             else if (!strcasecmp(argv[1],"notice")) server.verbosity = REDIS_NOTICE;
  89             else if (!strcasecmp(argv[1],"warning")) server.verbosity = REDIS_WARNING;
  90             else {
  91                 err = "Invalid log level. Must be one of debug, notice, warning";
  92                 goto loaderr;
  93             }
  94         } else if (!strcasecmp(argv[0],"logfile") && argc == 2) {
  95             FILE *logfp;
  96
  97             server.logfile = zstrdup(argv[1]);
  98             if (!strcasecmp(server.logfile,"stdout")) {
  99                 zfree(server.logfile);
 100                 server.logfile = NULL;
 101             }
 102             if (server.logfile) {
 103                 /* Test if we are able to open the file. The server will not
 104                  * be able to abort just for this problem later... */
 105                 logfp = fopen(server.logfile,"a");
 106                 if (logfp == NULL) {
 107                     err = sdscatprintf(sdsempty(),
 108                         "Can't open the log file: %s", strerror(errno));
 109                     goto loaderr;
 110                 }
 111                 fclose(logfp);
 112             }
 113         } else if (!strcasecmp(argv[0],"syslog-enabled") && argc == 2) {
 114             if ((server.syslog_enabled = yesnotoi(argv[1])) == -1) {
 115                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 116             }
 117         } else if (!strcasecmp(argv[0],"syslog-ident") && argc == 2) {
 118             if (server.syslog_ident) zfree(server.syslog_ident);
 119             server.syslog_ident = zstrdup(argv[1]);
 120         } else if (!strcasecmp(argv[0],"syslog-facility") && argc == 2) {
 121             struct {
 122                 const char     *name;
 123                 const int       value;
 124             } validSyslogFacilities[] = {
 125                 {"user",    LOG_USER},
 126                 {"local0",  LOG_LOCAL0},
 127                 {"local1",  LOG_LOCAL1},
 128                 {"local2",  LOG_LOCAL2},
 129                 {"local3",  LOG_LOCAL3},
 130                 {"local4",  LOG_LOCAL4},
 131                 {"local5",  LOG_LOCAL5},
 132                 {"local6",  LOG_LOCAL6},
 133                 {"local7",  LOG_LOCAL7},
 134                 {NULL, 0}
 135             };
 136             int i;
 137
 138             for (i = 0; validSyslogFacilities[i].name; i++) {
 139                 if (!strcasecmp(validSyslogFacilities[i].name, argv[1])) {
 140                     server.syslog_facility = validSyslogFacilities[i].value;
 141                     break;
 142                 }
 143             }
 144
 145             if (!validSyslogFacilities[i].name) {
 146                 err = "Invalid log facility. Must be one of USER or between LOCAL0-LOCAL7";
 147                 goto loaderr;
 148             }
 149         } else if (!strcasecmp(argv[0],"databases") && argc == 2) {
 150             server.dbnum = atoi(argv[1]);
 151             if (server.dbnum < 1) {
 152                 err = "Invalid number of databases"; goto loaderr;
 153             }
 154         } else if (!strcasecmp(argv[0],"include") && argc == 2) {
 155             loadServerConfig(argv[1],NULL);
 156         } else if (!strcasecmp(argv[0],"maxclients") && argc == 2) {
 157             server.maxclients = atoi(argv[1]);
 158         } else if (!strcasecmp(argv[0],"maxmemory") && argc == 2) {
 159             server.maxmemory = memtoll(argv[1],NULL);
 160         } else if (!strcasecmp(argv[0],"maxmemory-policy") && argc == 2) {
 161             if (!strcasecmp(argv[1],"volatile-lru")) {
 162                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 163             } else if (!strcasecmp(argv[1],"volatile-random")) {
 164                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 165             } else if (!strcasecmp(argv[1],"volatile-ttl")) {
 166                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 167             } else if (!strcasecmp(argv[1],"allkeys-lru")) {
 168                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 169             } else if (!strcasecmp(argv[1],"allkeys-random")) {
 170                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 171             } else if (!strcasecmp(argv[1],"noeviction")) {
 172                 server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 173             } else {
 174                 err = "Invalid maxmemory policy";
 175                 goto loaderr;
 176             }
 177         } else if (!strcasecmp(argv[0],"maxmemory-samples") && argc == 2) {
 178             server.maxmemory_samples = atoi(argv[1]);
 179             if (server.maxmemory_samples <= 0) {
 180                 err = "maxmemory-samples must be 1 or greater";
 181                 goto loaderr;
 182             }
 183         } else if (!strcasecmp(argv[0],"slaveof") && argc == 3) {
 184             server.masterhost = sdsnew(argv[1]);
 185             server.masterport = atoi(argv[2]);
 186             server.repl_state = REDIS_REPL_CONNECT;
 187         } else if (!strcasecmp(argv[0],"repl-ping-slave-period") && argc == 2) {
 188             server.repl_ping_slave_period = atoi(argv[1]);
 189             if (server.repl_ping_slave_period <= 0) {
 190                 err = "repl-ping-slave-period must be 1 or greater";
 191                 goto loaderr;
 192             }
 193         } else if (!strcasecmp(argv[0],"repl-timeout") && argc == 2) {
 194             server.repl_timeout = atoi(argv[1]);
 195             if (server.repl_timeout <= 0) {
 196                 err = "repl-timeout must be 1 or greater";
 197                 goto loaderr;
 198             }
 199         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
 200                 server.masterauth = zstrdup(argv[1]);
 201         } else if (!strcasecmp(argv[0],"slave-serve-stale-data") && argc == 2) {
 202             if ((server.repl_serve_stale_data = yesnotoi(argv[1])) == -1) {
 203                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 204             }
 205         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 206             if ((server.rdb_compression = yesnotoi(argv[1])) == -1) {
 207                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 208             }
 209         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 210             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 211                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 212             }
 213         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 214             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 215                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 216             }
 217         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 218             int yes;
 219
 220             if ((yes = yesnotoi(argv[1])) == -1) {
 221                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 222             }
 223             server.aof_state = yes ? REDIS_AOF_ON : REDIS_AOF_OFF;
 224         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 225             zfree(server.aof_filename);
 226             server.aof_filename = zstrdup(argv[1]);
 227         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 228                    && argc == 2) {
 229             if ((server.aof_no_fsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 230                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 231             }
 232         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 233             if (!strcasecmp(argv[1],"no")) {
 234                 server.aof_fsync = AOF_FSYNC_NO;
 235             } else if (!strcasecmp(argv[1],"always")) {
 236                 server.aof_fsync = AOF_FSYNC_ALWAYS;
 237             } else if (!strcasecmp(argv[1],"everysec")) {
 238                 server.aof_fsync = AOF_FSYNC_EVERYSEC;
 239             } else {
 240                 err = "argument must be 'no', 'always' or 'everysec'";
 241                 goto loaderr;
 242             }
 243         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-percentage") &&
 244                    argc == 2)
 245         {
 246             server.aof_rewrite_perc = atoi(argv[1]);
 247             if (server.aof_rewrite_perc < 0) {
 248                 err = "Invalid negative percentage for AOF auto rewrite";
 249                 goto loaderr;
 250             }
 251         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-min-size") &&
 252                    argc == 2)
 253         {
 254             server.aof_rewrite_min_size = memtoll(argv[1],NULL);
 255         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 256             server.requirepass = zstrdup(argv[1]);
 257         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 258             zfree(server.pidfile);
 259             server.pidfile = zstrdup(argv[1]);
 260         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 261             zfree(server.rdb_filename);
 262             server.rdb_filename = zstrdup(argv[1]);
 263         } else if (!strcasecmp(argv[0],"hash-max-ziplist-entries") && argc == 2) {
 264             server.hash_max_ziplist_entries = memtoll(argv[1], NULL);
 265         } else if (!strcasecmp(argv[0],"hash-max-ziplist-value") && argc == 2) {
 266             server.hash_max_ziplist_value = memtoll(argv[1], NULL);
 267         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 268             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 269         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
 270             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 271         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2) {
 272             server.set_max_intset_entries = memtoll(argv[1], NULL);
 273         } else if (!strcasecmp(argv[0],"zset-max-ziplist-entries") && argc == 2) {
 274             server.zset_max_ziplist_entries = memtoll(argv[1], NULL);
 275         } else if (!strcasecmp(argv[0],"zset-max-ziplist-value") && argc == 2) {
 276             server.zset_max_ziplist_value = memtoll(argv[1], NULL);
 277         } else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
 278             struct redisCommand *cmd = lookupCommand(argv[1]);
 279             int retval;
 280
 281             if (!cmd) {
 282                 err = "No such command in rename-command";
 283                 goto loaderr;
 284             }
 285
 286             /* If the target command name is the emtpy string we just
 287              * remove it from the command table. */
 288             retval = dictDelete(server.commands, argv[1]);
 289             redisAssert(retval == DICT_OK);
 290
 291             /* Otherwise we re-add the command under a different name. */
 292             if (sdslen(argv[2]) != 0) {
 293                 sds copy = sdsdup(argv[2]);
 294
 295                 retval = dictAdd(server.commands, copy, cmd);
 296                 if (retval != DICT_OK) {
 297                     sdsfree(copy);
 298                     err = "Target command name already exists"; goto loaderr;
 299                 }
 300             }
 301         } else if (!strcasecmp(argv[0],"cluster-enabled") && argc == 2) {
 302             if ((server.cluster_enabled = yesnotoi(argv[1])) == -1) {
 303                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 304             }
 305         } else if (!strcasecmp(argv[0],"cluster-config-file") && argc == 2) {
 306             zfree(server.cluster.configfile);
 307             server.cluster.configfile = zstrdup(argv[1]);
 308         } else if (!strcasecmp(argv[0],"lua-time-limit") && argc == 2) {
 309             server.lua_time_limit = strtoll(argv[1],NULL,10);
 310         } else if (!strcasecmp(argv[0],"slowlog-log-slower-than") &&
 311                    argc == 2)
 312         {
 313             server.slowlog_log_slower_than = strtoll(argv[1],NULL,10);
 314         } else if (!strcasecmp(argv[0],"slowlog-max-len") && argc == 2) {
 315             server.slowlog_max_len = strtoll(argv[1],NULL,10);
 316         } else if (!strcasecmp(argv[0],"client-output-buffer-limit") &&
 317                    argc == 5)
 318         {
 319             int class = getClientLimitClassByName(argv[1]);
 320             unsigned long long hard, soft;
 321             int soft_seconds;
 322
 323             if (class == -1) {
 324                 err = "Unrecognized client limit class";
 325                 goto loaderr;
 326             }
 327             hard = memtoll(argv[2],NULL);
 328             soft = memtoll(argv[3],NULL);
 329             soft_seconds = atoi(argv[4]);
 330             if (soft_seconds < 0) {
 331                 err = "Negative number of seconds in soft limt is invalid";
 332                 goto loaderr;
 333             }
 334             server.client_obuf_limits[class].hard_limit_bytes = hard;
 335             server.client_obuf_limits[class].soft_limit_bytes = soft;
 336             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 337         } else if (!strcasecmp(argv[0],"stop-writes-on-bgsave-error") &&
 338                    argc == 2) {
 339             if ((server.stop_writes_on_bgsave_err = yesnotoi(argv[1])) == -1) {
 340                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 341             }
 342         } else {
 343             err = "Bad directive or wrong number of arguments"; goto loaderr;
 344         }
 345         sdsfreesplitres(argv,argc);
 346     }
 347     sdsfreesplitres(lines,totlines);
 348     return;
 349
 350 loaderr:
 351     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 352     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 353     fprintf(stderr, ">>> '%s'\n", lines[i]);
 354     fprintf(stderr, "%s\n", err);
 355     exit(1);
 356 }
 357
 358 /* Load the server configuration from the specified filename.
 359  * The function appends the additional configuration directives stored
 360  * in the 'options' string to the config file before loading.
 361  *
 362  * Both filename and options can be NULL, in such a case are considered
 363  * emtpy. This way loadServerConfig can be used to just load a file or
 364  * just load a string. */
 365 void loadServerConfig(char *filename, char *options) {
 366     sds config = sdsempty();
 367     char buf[REDIS_CONFIGLINE_MAX+1];
 368
 369     /* Load the file content */
 370     if (filename) {
 371         FILE *fp;
 372
 373         if (filename[0] == '-' && filename[1] == '\0') {
 374             fp = stdin;
 375         } else {
 376             if ((fp = fopen(filename,"r")) == NULL) {
 377                 redisLog(REDIS_WARNING,
 378                     "Fatal error, can't open config file '%s'", filename);
 379                 exit(1);
 380             }
 381         }
 382         while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL)
 383             config = sdscat(config,buf);
 384         if (fp != stdin) fclose(fp);
 385     }
 386     /* Append the additional options */
 387     if (options) {
 388         config = sdscat(config,"\n");
 389         config = sdscat(config,options);
 390     }
 391     loadServerConfigFromString(config);
 392     sdsfree(config);
 393 }
 394
 395 /*-----------------------------------------------------------------------------
 396  * CONFIG command for remote configuration
 397  *----------------------------------------------------------------------------*/
 398
 399 void configSetCommand(redisClient *c) {
 400     robj *o;
 401     long long ll;
 402     redisAssertWithInfo(c,c->argv[2],c->argv[2]->encoding == REDIS_ENCODING_RAW);
 403     redisAssertWithInfo(c,c->argv[2],c->argv[3]->encoding == REDIS_ENCODING_RAW);
 404     o = c->argv[3];
 405
 406     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 407         zfree(server.rdb_filename);
 408         server.rdb_filename = zstrdup(o->ptr);
 409     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 410         zfree(server.requirepass);
 411         server.requirepass = ((char*)o->ptr)[0] ? zstrdup(o->ptr) : NULL;
 412     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 413         zfree(server.masterauth);
 414         server.masterauth = zstrdup(o->ptr);
 415     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 416         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 417             ll < 0) goto badfmt;
 418         server.maxmemory = ll;
 419         if (server.maxmemory) freeMemoryIfNeeded();
 420     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 421         if (!strcasecmp(o->ptr,"volatile-lru")) {
 422             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 423         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 424             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 425         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 426             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 427         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 428             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 429         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 430             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 431         } else if (!strcasecmp(o->ptr,"noeviction")) {
 432             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 433         } else {
 434             goto badfmt;
 435         }
 436     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 437         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 438             ll <= 0) goto badfmt;
 439         server.maxmemory_samples = ll;
 440     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 441         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 442             ll < 0 || ll > LONG_MAX) goto badfmt;
 443         server.maxidletime = ll;
 444     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 445         if (!strcasecmp(o->ptr,"no")) {
 446             server.aof_fsync = AOF_FSYNC_NO;
 447         } else if (!strcasecmp(o->ptr,"everysec")) {
 448             server.aof_fsync = AOF_FSYNC_EVERYSEC;
 449         } else if (!strcasecmp(o->ptr,"always")) {
 450             server.aof_fsync = AOF_FSYNC_ALWAYS;
 451         } else {
 452             goto badfmt;
 453         }
 454     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 455         int yn = yesnotoi(o->ptr);
 456
 457         if (yn == -1) goto badfmt;
 458         server.aof_no_fsync_on_rewrite = yn;
 459     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 460         int enable = yesnotoi(o->ptr);
 461
 462         if (enable == -1) goto badfmt;
 463         if (enable == 0 && server.aof_state != REDIS_AOF_OFF) {
 464             stopAppendOnly();
 465         } else if (enable && server.aof_state == REDIS_AOF_OFF) {
 466             if (startAppendOnly() == REDIS_ERR) {
 467                 addReplyError(c,
 468                     "Unable to turn on AOF. Check server logs.");
 469                 return;
 470             }
 471         }
 472     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-percentage")) {
 473         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 474         server.aof_rewrite_perc = ll;
 475     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-min-size")) {
 476         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 477         server.aof_rewrite_min_size = ll;
 478     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 479         int vlen, j;
 480         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 481
 482         /* Perform sanity check before setting the new config:
 483          * - Even number of args
 484          * - Seconds >= 1, changes >= 0 */
 485         if (vlen & 1) {
 486             sdsfreesplitres(v,vlen);
 487             goto badfmt;
 488         }
 489         for (j = 0; j < vlen; j++) {
 490             char *eptr;
 491             long val;
 492
 493             val = strtoll(v[j], &eptr, 10);
 494             if (eptr[0] != '\0' ||
 495                 ((j & 1) == 0 && val < 1) ||
 496                 ((j & 1) == 1 && val < 0)) {
 497                 sdsfreesplitres(v,vlen);
 498                 goto badfmt;
 499             }
 500         }
 501         /* Finally set the new config */
 502         resetServerSaveParams();
 503         for (j = 0; j < vlen; j += 2) {
 504             time_t seconds;
 505             int changes;
 506
 507             seconds = strtoll(v[j],NULL,10);
 508             changes = strtoll(v[j+1],NULL,10);
 509             appendServerSaveParams(seconds, changes);
 510         }
 511         sdsfreesplitres(v,vlen);
 512     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 513         int yn = yesnotoi(o->ptr);
 514
 515         if (yn == -1) goto badfmt;
 516         server.repl_serve_stale_data = yn;
 517     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 518         if (chdir((char*)o->ptr) == -1) {
 519             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 520             return;
 521         }
 522     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-entries")) {
 523         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 524         server.hash_max_ziplist_entries = ll;
 525     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-value")) {
 526         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 527         server.hash_max_ziplist_value = ll;
 528     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 529         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 530         server.list_max_ziplist_entries = ll;
 531     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 532         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 533         server.list_max_ziplist_value = ll;
 534     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 535         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 536         server.set_max_intset_entries = ll;
 537     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 538         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 539         server.zset_max_ziplist_entries = ll;
 540     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 541         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 542         server.zset_max_ziplist_value = ll;
 543     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
 544         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 545         server.lua_time_limit = ll;
 546     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-log-slower-than")) {
 547         if (getLongLongFromObject(o,&ll) == REDIS_ERR) goto badfmt;
 548         server.slowlog_log_slower_than = ll;
 549     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-max-len")) {
 550         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 551         server.slowlog_max_len = (unsigned)ll;
 552     } else if (!strcasecmp(c->argv[2]->ptr,"loglevel")) {
 553         if (!strcasecmp(o->ptr,"warning")) {
 554             server.verbosity = REDIS_WARNING;
 555         } else if (!strcasecmp(o->ptr,"notice")) {
 556             server.verbosity = REDIS_NOTICE;
 557         } else if (!strcasecmp(o->ptr,"verbose")) {
 558             server.verbosity = REDIS_VERBOSE;
 559         } else if (!strcasecmp(o->ptr,"debug")) {
 560             server.verbosity = REDIS_DEBUG;
 561         } else {
 562             goto badfmt;
 563         }
 564     } else if (!strcasecmp(c->argv[2]->ptr,"client-output-buffer-limit")) {
 565         int vlen, j;
 566         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 567
 568         /* We need a multiple of 4: <class> <hard> <soft> <soft_seconds> */
 569         if (vlen % 4) {
 570             sdsfreesplitres(v,vlen);
 571             goto badfmt;
 572         }
 573
 574         /* Sanity check of single arguments, so that we either refuse the
 575          * whole configuration string or accept it all, even if a single
 576          * error in a single client class is present. */
 577         for (j = 0; j < vlen; j++) {
 578             char *eptr;
 579             long val;
 580
 581             if ((j % 4) == 0) {
 582                 if (getClientLimitClassByName(v[j]) == -1) {
 583                     sdsfreesplitres(v,vlen);
 584                     goto badfmt;
 585                 }
 586             } else {
 587                 val = strtoll(v[j], &eptr, 10);
 588                 if (eptr[0] != '\0' || val < 0) {
 589                     sdsfreesplitres(v,vlen);
 590                     goto badfmt;
 591                 }
 592             }
 593         }
 594         /* Finally set the new config */
 595         for (j = 0; j < vlen; j += 4) {
 596             int class;
 597             unsigned long long hard, soft;
 598             int soft_seconds;
 599
 600             class = getClientLimitClassByName(v[j]);
 601             hard = strtoll(v[j+1],NULL,10);
 602             soft = strtoll(v[j+2],NULL,10);
 603             soft_seconds = strtoll(v[j+3],NULL,10);
 604
 605             server.client_obuf_limits[class].hard_limit_bytes = hard;
 606             server.client_obuf_limits[class].soft_limit_bytes = soft;
 607             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 608         }
 609         sdsfreesplitres(v,vlen);
 610     } else if (!strcasecmp(c->argv[2]->ptr,"stop-writes-on-bgsave-error")) {
 611         int yn = yesnotoi(o->ptr);
 612
 613         if (yn == -1) goto badfmt;
 614         server.stop_writes_on_bgsave_err = yn;
 615     } else if (!strcasecmp(c->argv[2]->ptr,"repl-ping-slave-period")) {
 616         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 617         server.repl_ping_slave_period = ll;
 618     } else if (!strcasecmp(c->argv[2]->ptr,"repl-timeout")) {
 619         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 620         server.repl_timeout = ll;
 621     } else {
 622         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 623             (char*)c->argv[2]->ptr);
 624         return;
 625     }
 626     addReply(c,shared.ok);
 627     return;
 628
 629 badfmt: /* Bad format errors */
 630     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 631             (char*)o->ptr,
 632             (char*)c->argv[2]->ptr);
 633 }
 634
 635 #define config_get_string_field(_name,_var) do { \
 636     if (stringmatch(pattern,_name,0)) { \
 637         addReplyBulkCString(c,_name); \
 638         addReplyBulkCString(c,_var ? _var : ""); \
 639         matches++; \
 640     } \
 641 } while(0);
 642
 643 #define config_get_bool_field(_name,_var) do { \
 644     if (stringmatch(pattern,_name,0)) { \
 645         addReplyBulkCString(c,_name); \
 646         addReplyBulkCString(c,_var ? "yes" : "no"); \
 647         matches++; \
 648     } \
 649 } while(0);
 650
 651 #define config_get_numerical_field(_name,_var) do { \
 652     if (stringmatch(pattern,_name,0)) { \
 653         ll2string(buf,sizeof(buf),_var); \
 654         addReplyBulkCString(c,_name); \
 655         addReplyBulkCString(c,buf); \
 656         matches++; \
 657     } \
 658 } while(0);
 659
 660 void configGetCommand(redisClient *c) {
 661     robj *o = c->argv[2];
 662     void *replylen = addDeferredMultiBulkLength(c);
 663     char *pattern = o->ptr;
 664     char buf[128];
 665     int matches = 0;
 666     redisAssertWithInfo(c,o,o->encoding == REDIS_ENCODING_RAW);
 667
 668     /* String values */
 669     config_get_string_field("dbfilename",server.rdb_filename);
 670     config_get_string_field("requirepass",server.requirepass);
 671     config_get_string_field("masterauth",server.requirepass);
 672     config_get_string_field("bind",server.bindaddr);
 673     config_get_string_field("unixsocket",server.unixsocket);
 674     config_get_string_field("logfile",server.logfile);
 675     config_get_string_field("pidfile",server.pidfile);
 676
 677     /* Numerical values */
 678     config_get_numerical_field("maxmemory",server.maxmemory);
 679     config_get_numerical_field("maxmemory-samples",server.maxmemory_samples);
 680     config_get_numerical_field("timeout",server.maxidletime);
 681     config_get_numerical_field("auto-aof-rewrite-percentage",
 682             server.aof_rewrite_perc);
 683     config_get_numerical_field("auto-aof-rewrite-min-size",
 684             server.aof_rewrite_min_size);
 685     config_get_numerical_field("hash-max-ziplist-entries",
 686             server.hash_max_ziplist_entries);
 687     config_get_numerical_field("hash-max-ziplist-value",
 688             server.hash_max_ziplist_value);
 689     config_get_numerical_field("list-max-ziplist-entries",
 690             server.list_max_ziplist_entries);
 691     config_get_numerical_field("list-max-ziplist-value",
 692             server.list_max_ziplist_value);
 693     config_get_numerical_field("set-max-intset-entries",
 694             server.set_max_intset_entries);
 695     config_get_numerical_field("zset-max-ziplist-entries",
 696             server.zset_max_ziplist_entries);
 697     config_get_numerical_field("zset-max-ziplist-value",
 698             server.zset_max_ziplist_value);
 699     config_get_numerical_field("lua-time-limit",server.lua_time_limit);
 700     config_get_numerical_field("slowlog-log-slower-than",
 701             server.slowlog_log_slower_than);
 702     config_get_numerical_field("slowlog-max-len",
 703             server.slowlog_max_len);
 704     config_get_numerical_field("port",server.port);
 705     config_get_numerical_field("databases",server.dbnum);
 706     config_get_numerical_field("repl-ping-slave-period",server.repl_ping_slave_period);
 707     config_get_numerical_field("repl-timeout",server.repl_timeout);
 708     config_get_numerical_field("maxclients",server.maxclients);
 709
 710     /* Bool (yes/no) values */
 711     config_get_bool_field("no-appendfsync-on-rewrite",
 712             server.aof_no_fsync_on_rewrite);
 713     config_get_bool_field("slave-serve-stale-data",
 714             server.repl_serve_stale_data);
 715     config_get_bool_field("stop-writes-on-bgsave-error",
 716             server.stop_writes_on_bgsave_err);
 717     config_get_bool_field("daemonize", server.daemonize);
 718     config_get_bool_field("rdbcompression", server.rdb_compression);
 719     config_get_bool_field("activerehashing", server.activerehashing);
 720
 721     /* Everything we can't handle with macros follows. */
 722
 723     if (stringmatch(pattern,"appendonly",0)) {
 724         addReplyBulkCString(c,"appendonly");
 725         addReplyBulkCString(c,server.aof_state == REDIS_AOF_OFF ? "no" : "yes");
 726         matches++;
 727     }
 728     if (stringmatch(pattern,"dir",0)) {
 729         char buf[1024];
 730
 731         if (getcwd(buf,sizeof(buf)) == NULL)
 732             buf[0] = '\0';
 733
 734         addReplyBulkCString(c,"dir");
 735         addReplyBulkCString(c,buf);
 736         matches++;
 737     }
 738     if (stringmatch(pattern,"maxmemory-policy",0)) {
 739         char *s;
 740
 741         switch(server.maxmemory_policy) {
 742         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 743         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 744         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 745         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 746         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 747         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 748         default: s = "unknown"; break; /* too harmless to panic */
 749         }
 750         addReplyBulkCString(c,"maxmemory-policy");
 751         addReplyBulkCString(c,s);
 752         matches++;
 753     }
 754     if (stringmatch(pattern,"appendfsync",0)) {
 755         char *policy;
 756
 757         switch(server.aof_fsync) {
 758         case AOF_FSYNC_NO: policy = "no"; break;
 759         case AOF_FSYNC_EVERYSEC: policy = "everysec"; break;
 760         case AOF_FSYNC_ALWAYS: policy = "always"; break;
 761         default: policy = "unknown"; break; /* too harmless to panic */
 762         }
 763         addReplyBulkCString(c,"appendfsync");
 764         addReplyBulkCString(c,policy);
 765         matches++;
 766     }
 767     if (stringmatch(pattern,"save",0)) {
 768         sds buf = sdsempty();
 769         int j;
 770
 771         for (j = 0; j < server.saveparamslen; j++) {
 772             buf = sdscatprintf(buf,"%ld %d",
 773                     server.saveparams[j].seconds,
 774                     server.saveparams[j].changes);
 775             if (j != server.saveparamslen-1)
 776                 buf = sdscatlen(buf," ",1);
 777         }
 778         addReplyBulkCString(c,"save");
 779         addReplyBulkCString(c,buf);
 780         sdsfree(buf);
 781         matches++;
 782     }
 783     if (stringmatch(pattern,"loglevel",0)) {
 784         char *s;
 785
 786         switch(server.verbosity) {
 787         case REDIS_WARNING: s = "warning"; break;
 788         case REDIS_VERBOSE: s = "verbose"; break;
 789         case REDIS_NOTICE: s = "notice"; break;
 790         case REDIS_DEBUG: s = "debug"; break;
 791         default: s = "unknown"; break; /* too harmless to panic */
 792         }
 793         addReplyBulkCString(c,"loglevel");
 794         addReplyBulkCString(c,s);
 795         matches++;
 796     }
 797     if (stringmatch(pattern,"client-output-buffer-limit",0)) {
 798         sds buf = sdsempty();
 799         int j;
 800
 801         for (j = 0; j < REDIS_CLIENT_LIMIT_NUM_CLASSES; j++) {
 802             buf = sdscatprintf(buf,"%s %llu %llu %ld",
 803                     getClientLimitClassName(j),
 804                     server.client_obuf_limits[j].hard_limit_bytes,
 805                     server.client_obuf_limits[j].soft_limit_bytes,
 806                     (long) server.client_obuf_limits[j].soft_limit_seconds);
 807             if (j != REDIS_CLIENT_LIMIT_NUM_CLASSES-1)
 808                 buf = sdscatlen(buf," ",1);
 809         }
 810         addReplyBulkCString(c,"client-output-buffer-limit");
 811         addReplyBulkCString(c,buf);
 812         sdsfree(buf);
 813         matches++;
 814     }
 815     if (stringmatch(pattern,"unixsocketperm",0)) {
 816         char buf[32];
 817         snprintf(buf,sizeof(buf),"%o",server.unixsocketperm);
 818         addReplyBulkCString(c,"unixsocketperm");
 819         addReplyBulkCString(c,buf);
 820         matches++;
 821     }
 822     if (stringmatch(pattern,"slaveof",0)) {
 823         char buf[256];
 824
 825         addReplyBulkCString(c,"slaveof");
 826         if (server.masterhost)
 827             snprintf(buf,sizeof(buf),"%s %d",
 828                 server.masterhost, server.masterport);
 829         else
 830             buf[0] = '\0';
 831         addReplyBulkCString(c,buf);
 832         matches++;
 833     }
 834     setDeferredMultiBulkLength(c,replylen,matches*2);
 835 }
 836
 837 void configCommand(redisClient *c) {
 838     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 839         if (c->argc != 4) goto badarity;
 840         configSetCommand(c);
 841     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 842         if (c->argc != 3) goto badarity;
 843         configGetCommand(c);
 844     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 845         if (c->argc != 2) goto badarity;
 846         server.stat_keyspace_hits = 0;
 847         server.stat_keyspace_misses = 0;
 848         server.stat_numcommands = 0;
 849         server.stat_numconnections = 0;
 850         server.stat_expiredkeys = 0;
 851         resetCommandTableStats();
 852         addReply(c,shared.ok);
 853     } else {
 854         addReplyError(c,
 855             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 856     }
 857     return;
 858
 859 badarity:
 860     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 861         (char*) c->argv[1]->ptr);
 862 }