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