src/config.c

   1 /* Configuration file parsing and CONFIG GET/SET commands implementation.
   2  *
   3  * Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  *   * Redistributions of source code must retain the above copyright notice,
  10  *     this list of conditions and the following disclaimer.
  11  *   * Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *   * Neither the name of Redis nor the names of its contributors may be used
  15  *     to endorse or promote products derived from this software without
  16  *     specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31
  32 #include "redis.h"
  33
  34 /*-----------------------------------------------------------------------------
  35  * Config file parsing
  36  *----------------------------------------------------------------------------*/
  37
  38 int yesnotoi(char *s) {
  39     if (!strcasecmp(s,"yes")) return 1;
  40     else if (!strcasecmp(s,"no")) return 0;
  41     else return -1;
  42 }
  43
  44 void appendServerSaveParams(time_t seconds, int changes) {
  45     server.saveparams = zrealloc(server.saveparams,sizeof(struct saveparam)*(server.saveparamslen+1));
  46     server.saveparams[server.saveparamslen].seconds = seconds;
  47     server.saveparams[server.saveparamslen].changes = changes;
  48     server.saveparamslen++;
  49 }
  50
  51 void resetServerSaveParams() {
  52     zfree(server.saveparams);
  53     server.saveparams = NULL;
  54     server.saveparamslen = 0;
  55 }
  56
  57 void loadServerConfigFromString(char *config) {
  58     char *err = NULL;
  59     int linenum = 0, totlines, i;
  60     sds *lines;
  61
  62     lines = sdssplitlen(config,strlen(config),"\n",1,&totlines);
  63
  64     for (i = 0; i < totlines; i++) {
  65         sds *argv;
  66         int argc;
  67
  68         linenum = i+1;
  69         lines[i] = sdstrim(lines[i]," \t\r\n");
  70
  71         /* Skip comments and blank lines*/
  72         if (lines[i][0] == '#' || lines[i][0] == '\0') continue;
  73
  74         /* Split into arguments */
  75         argv = sdssplitargs(lines[i],&argc);
  76         sdstolower(argv[0]);
  77
  78         /* Execute config directives */
  79         if (!strcasecmp(argv[0],"timeout") && argc == 2) {
  80             server.maxidletime = atoi(argv[1]);
  81             if (server.maxidletime < 0) {
  82                 err = "Invalid timeout value"; goto loaderr;
  83             }
  84         } else if (!strcasecmp(argv[0],"port") && argc == 2) {
  85             server.port = atoi(argv[1]);
  86             if (server.port < 0 || server.port > 65535) {
  87                 err = "Invalid port"; goto loaderr;
  88             }
  89         } else if (!strcasecmp(argv[0],"bind") && argc == 2) {
  90             server.bindaddr = zstrdup(argv[1]);
  91         } else if (!strcasecmp(argv[0],"unixsocket") && argc == 2) {
  92             server.unixsocket = zstrdup(argv[1]);
  93         } else if (!strcasecmp(argv[0],"unixsocketperm") && argc == 2) {
  94             errno = 0;
  95             server.unixsocketperm = (mode_t)strtol(argv[1], NULL, 8);
  96             if (errno || server.unixsocketperm > 0777) {
  97                 err = "Invalid socket file permissions"; goto loaderr;
  98             }
  99         } else if (!strcasecmp(argv[0],"save")) {
 100             if (argc == 3) {
 101                 int seconds = atoi(argv[1]);
 102                 int changes = atoi(argv[2]);
 103                 if (seconds < 1 || changes < 0) {
 104                     err = "Invalid save parameters"; goto loaderr;
 105                 }
 106                 appendServerSaveParams(seconds,changes);
 107             } else if (argc == 2 && !strcasecmp(argv[1],"")) {
 108                 resetServerSaveParams();
 109             }
 110         } else if (!strcasecmp(argv[0],"dir") && argc == 2) {
 111             if (chdir(argv[1]) == -1) {
 112                 redisLog(REDIS_WARNING,"Can't chdir to '%s': %s",
 113                     argv[1], strerror(errno));
 114                 exit(1);
 115             }
 116         } else if (!strcasecmp(argv[0],"loglevel") && argc == 2) {
 117             if (!strcasecmp(argv[1],"debug")) server.verbosity = REDIS_DEBUG;
 118             else if (!strcasecmp(argv[1],"verbose")) server.verbosity = REDIS_VERBOSE;
 119             else if (!strcasecmp(argv[1],"notice")) server.verbosity = REDIS_NOTICE;
 120             else if (!strcasecmp(argv[1],"warning")) server.verbosity = REDIS_WARNING;
 121             else {
 122                 err = "Invalid log level. Must be one of debug, notice, warning";
 123                 goto loaderr;
 124             }
 125         } else if (!strcasecmp(argv[0],"logfile") && argc == 2) {
 126             FILE *logfp;
 127
 128             server.logfile = zstrdup(argv[1]);
 129             if (!strcasecmp(server.logfile,"stdout")) {
 130                 zfree(server.logfile);
 131                 server.logfile = NULL;
 132             }
 133             if (server.logfile) {
 134                 /* Test if we are able to open the file. The server will not
 135                  * be able to abort just for this problem later... */
 136                 logfp = fopen(server.logfile,"a");
 137                 if (logfp == NULL) {
 138                     err = sdscatprintf(sdsempty(),
 139                         "Can't open the log file: %s", strerror(errno));
 140                     goto loaderr;
 141                 }
 142                 fclose(logfp);
 143             }
 144         } else if (!strcasecmp(argv[0],"syslog-enabled") && argc == 2) {
 145             if ((server.syslog_enabled = yesnotoi(argv[1])) == -1) {
 146                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 147             }
 148         } else if (!strcasecmp(argv[0],"syslog-ident") && argc == 2) {
 149             if (server.syslog_ident) zfree(server.syslog_ident);
 150             server.syslog_ident = zstrdup(argv[1]);
 151         } else if (!strcasecmp(argv[0],"syslog-facility") && argc == 2) {
 152             struct {
 153                 const char     *name;
 154                 const int       value;
 155             } validSyslogFacilities[] = {
 156                 {"user",    LOG_USER},
 157                 {"local0",  LOG_LOCAL0},
 158                 {"local1",  LOG_LOCAL1},
 159                 {"local2",  LOG_LOCAL2},
 160                 {"local3",  LOG_LOCAL3},
 161                 {"local4",  LOG_LOCAL4},
 162                 {"local5",  LOG_LOCAL5},
 163                 {"local6",  LOG_LOCAL6},
 164                 {"local7",  LOG_LOCAL7},
 165                 {NULL, 0}
 166             };
 167             int i;
 168
 169             for (i = 0; validSyslogFacilities[i].name; i++) {
 170                 if (!strcasecmp(validSyslogFacilities[i].name, argv[1])) {
 171                     server.syslog_facility = validSyslogFacilities[i].value;
 172                     break;
 173                 }
 174             }
 175
 176             if (!validSyslogFacilities[i].name) {
 177                 err = "Invalid log facility. Must be one of USER or between LOCAL0-LOCAL7";
 178                 goto loaderr;
 179             }
 180         } else if (!strcasecmp(argv[0],"databases") && argc == 2) {
 181             server.dbnum = atoi(argv[1]);
 182             if (server.dbnum < 1) {
 183                 err = "Invalid number of databases"; goto loaderr;
 184             }
 185         } else if (!strcasecmp(argv[0],"include") && argc == 2) {
 186             loadServerConfig(argv[1],NULL);
 187         } else if (!strcasecmp(argv[0],"maxclients") && argc == 2) {
 188             server.maxclients = atoi(argv[1]);
 189             if (server.maxclients < 1) {
 190                 err = "Invalid max clients limit"; goto loaderr;
 191             }
 192         } else if (!strcasecmp(argv[0],"maxmemory") && argc == 2) {
 193             server.maxmemory = memtoll(argv[1],NULL);
 194         } else if (!strcasecmp(argv[0],"maxmemory-policy") && argc == 2) {
 195             if (!strcasecmp(argv[1],"volatile-lru")) {
 196                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 197             } else if (!strcasecmp(argv[1],"volatile-random")) {
 198                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 199             } else if (!strcasecmp(argv[1],"volatile-ttl")) {
 200                 server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 201             } else if (!strcasecmp(argv[1],"allkeys-lru")) {
 202                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 203             } else if (!strcasecmp(argv[1],"allkeys-random")) {
 204                 server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 205             } else if (!strcasecmp(argv[1],"noeviction")) {
 206                 server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 207             } else {
 208                 err = "Invalid maxmemory policy";
 209                 goto loaderr;
 210             }
 211         } else if (!strcasecmp(argv[0],"maxmemory-samples") && argc == 2) {
 212             server.maxmemory_samples = atoi(argv[1]);
 213             if (server.maxmemory_samples <= 0) {
 214                 err = "maxmemory-samples must be 1 or greater";
 215                 goto loaderr;
 216             }
 217         } else if (!strcasecmp(argv[0],"slaveof") && argc == 3) {
 218             server.masterhost = sdsnew(argv[1]);
 219             server.masterport = atoi(argv[2]);
 220             server.repl_state = REDIS_REPL_CONNECT;
 221         } else if (!strcasecmp(argv[0],"repl-ping-slave-period") && argc == 2) {
 222             server.repl_ping_slave_period = atoi(argv[1]);
 223             if (server.repl_ping_slave_period <= 0) {
 224                 err = "repl-ping-slave-period must be 1 or greater";
 225                 goto loaderr;
 226             }
 227         } else if (!strcasecmp(argv[0],"repl-timeout") && argc == 2) {
 228             server.repl_timeout = atoi(argv[1]);
 229             if (server.repl_timeout <= 0) {
 230                 err = "repl-timeout must be 1 or greater";
 231                 goto loaderr;
 232             }
 233         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
 234                 server.masterauth = zstrdup(argv[1]);
 235         } else if (!strcasecmp(argv[0],"slave-serve-stale-data") && argc == 2) {
 236             if ((server.repl_serve_stale_data = yesnotoi(argv[1])) == -1) {
 237                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 238             }
 239         } else if (!strcasecmp(argv[0],"slave-read-only") && argc == 2) {
 240             if ((server.repl_slave_ro = yesnotoi(argv[1])) == -1) {
 241                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 242             }
 243         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 244             if ((server.rdb_compression = yesnotoi(argv[1])) == -1) {
 245                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 246             }
 247         } else if (!strcasecmp(argv[0],"rdbchecksum") && argc == 2) {
 248             if ((server.rdb_checksum = yesnotoi(argv[1])) == -1) {
 249                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 250             }
 251         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 252             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 253                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 254             }
 255         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 256             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 257                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 258             }
 259         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 260             int yes;
 261
 262             if ((yes = yesnotoi(argv[1])) == -1) {
 263                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 264             }
 265             server.aof_state = yes ? REDIS_AOF_ON : REDIS_AOF_OFF;
 266         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 267             zfree(server.aof_filename);
 268             server.aof_filename = zstrdup(argv[1]);
 269         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 270                    && argc == 2) {
 271             if ((server.aof_no_fsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 272                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 273             }
 274         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 275             if (!strcasecmp(argv[1],"no")) {
 276                 server.aof_fsync = AOF_FSYNC_NO;
 277             } else if (!strcasecmp(argv[1],"always")) {
 278                 server.aof_fsync = AOF_FSYNC_ALWAYS;
 279             } else if (!strcasecmp(argv[1],"everysec")) {
 280                 server.aof_fsync = AOF_FSYNC_EVERYSEC;
 281             } else {
 282                 err = "argument must be 'no', 'always' or 'everysec'";
 283                 goto loaderr;
 284             }
 285         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-percentage") &&
 286                    argc == 2)
 287         {
 288             server.aof_rewrite_perc = atoi(argv[1]);
 289             if (server.aof_rewrite_perc < 0) {
 290                 err = "Invalid negative percentage for AOF auto rewrite";
 291                 goto loaderr;
 292             }
 293         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-min-size") &&
 294                    argc == 2)
 295         {
 296             server.aof_rewrite_min_size = memtoll(argv[1],NULL);
 297         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 298             if (strlen(argv[1]) > REDIS_AUTHPASS_MAX_LEN) {
 299                 err = "Password is longer than REDIS_AUTHPASS_MAX_LEN";
 300                 goto loaderr;
 301             }
 302             server.requirepass = zstrdup(argv[1]);
 303         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 304             zfree(server.pidfile);
 305             server.pidfile = zstrdup(argv[1]);
 306         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 307             zfree(server.rdb_filename);
 308             server.rdb_filename = zstrdup(argv[1]);
 309         } else if (!strcasecmp(argv[0],"hash-max-ziplist-entries") && argc == 2) {
 310             server.hash_max_ziplist_entries = memtoll(argv[1], NULL);
 311         } else if (!strcasecmp(argv[0],"hash-max-ziplist-value") && argc == 2) {
 312             server.hash_max_ziplist_value = memtoll(argv[1], NULL);
 313         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 314             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 315         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
 316             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 317         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2) {
 318             server.set_max_intset_entries = memtoll(argv[1], NULL);
 319         } else if (!strcasecmp(argv[0],"zset-max-ziplist-entries") && argc == 2) {
 320             server.zset_max_ziplist_entries = memtoll(argv[1], NULL);
 321         } else if (!strcasecmp(argv[0],"zset-max-ziplist-value") && argc == 2) {
 322             server.zset_max_ziplist_value = memtoll(argv[1], NULL);
 323         } else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
 324             struct redisCommand *cmd = lookupCommand(argv[1]);
 325             int retval;
 326
 327             if (!cmd) {
 328                 err = "No such command in rename-command";
 329                 goto loaderr;
 330             }
 331
 332             /* If the target command name is the emtpy string we just
 333              * remove it from the command table. */
 334             retval = dictDelete(server.commands, argv[1]);
 335             redisAssert(retval == DICT_OK);
 336
 337             /* Otherwise we re-add the command under a different name. */
 338             if (sdslen(argv[2]) != 0) {
 339                 sds copy = sdsdup(argv[2]);
 340
 341                 retval = dictAdd(server.commands, copy, cmd);
 342                 if (retval != DICT_OK) {
 343                     sdsfree(copy);
 344                     err = "Target command name already exists"; goto loaderr;
 345                 }
 346             }
 347         } else if (!strcasecmp(argv[0],"cluster-enabled") && argc == 2) {
 348             if ((server.cluster_enabled = yesnotoi(argv[1])) == -1) {
 349                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 350             }
 351         } else if (!strcasecmp(argv[0],"cluster-config-file") && argc == 2) {
 352             zfree(server.cluster.configfile);
 353             server.cluster.configfile = zstrdup(argv[1]);
 354         } else if (!strcasecmp(argv[0],"lua-time-limit") && argc == 2) {
 355             server.lua_time_limit = strtoll(argv[1],NULL,10);
 356         } else if (!strcasecmp(argv[0],"slowlog-log-slower-than") &&
 357                    argc == 2)
 358         {
 359             server.slowlog_log_slower_than = strtoll(argv[1],NULL,10);
 360         } else if (!strcasecmp(argv[0],"slowlog-max-len") && argc == 2) {
 361             server.slowlog_max_len = strtoll(argv[1],NULL,10);
 362         } else if (!strcasecmp(argv[0],"client-output-buffer-limit") &&
 363                    argc == 5)
 364         {
 365             int class = getClientLimitClassByName(argv[1]);
 366             unsigned long long hard, soft;
 367             int soft_seconds;
 368
 369             if (class == -1) {
 370                 err = "Unrecognized client limit class";
 371                 goto loaderr;
 372             }
 373             hard = memtoll(argv[2],NULL);
 374             soft = memtoll(argv[3],NULL);
 375             soft_seconds = atoi(argv[4]);
 376             if (soft_seconds < 0) {
 377                 err = "Negative number of seconds in soft limt is invalid";
 378                 goto loaderr;
 379             }
 380             server.client_obuf_limits[class].hard_limit_bytes = hard;
 381             server.client_obuf_limits[class].soft_limit_bytes = soft;
 382             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 383         } else if (!strcasecmp(argv[0],"stop-writes-on-bgsave-error") &&
 384                    argc == 2) {
 385             if ((server.stop_writes_on_bgsave_err = yesnotoi(argv[1])) == -1) {
 386                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 387             }
 388         } else if (!strcasecmp(argv[0],"slave-priority") && argc == 2) {
 389             server.slave_priority = atoi(argv[1]);
 390         } else if (!strcasecmp(argv[0],"sentinel")) {
 391             /* argc == 1 is handled by main() as we need to enter the sentinel
 392              * mode ASAP. */
 393             if (argc != 1) {
 394                 if (!server.sentinel_mode) {
 395                     err = "sentinel directive while not in sentinel mode";
 396                     goto loaderr;
 397                 }
 398                 err = sentinelHandleConfiguration(argv+1,argc-1);
 399                 if (err) goto loaderr;
 400             }
 401         } else {
 402             err = "Bad directive or wrong number of arguments"; goto loaderr;
 403         }
 404         sdsfreesplitres(argv,argc);
 405     }
 406     sdsfreesplitres(lines,totlines);
 407     return;
 408
 409 loaderr:
 410     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 411     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 412     fprintf(stderr, ">>> '%s'\n", lines[i]);
 413     fprintf(stderr, "%s\n", err);
 414     exit(1);
 415 }
 416
 417 /* Load the server configuration from the specified filename.
 418  * The function appends the additional configuration directives stored
 419  * in the 'options' string to the config file before loading.
 420  *
 421  * Both filename and options can be NULL, in such a case are considered
 422  * emtpy. This way loadServerConfig can be used to just load a file or
 423  * just load a string. */
 424 void loadServerConfig(char *filename, char *options) {
 425     sds config = sdsempty();
 426     char buf[REDIS_CONFIGLINE_MAX+1];
 427
 428     /* Load the file content */
 429     if (filename) {
 430         FILE *fp;
 431
 432         if (filename[0] == '-' && filename[1] == '\0') {
 433             fp = stdin;
 434         } else {
 435             if ((fp = fopen(filename,"r")) == NULL) {
 436                 redisLog(REDIS_WARNING,
 437                     "Fatal error, can't open config file '%s'", filename);
 438                 exit(1);
 439             }
 440         }
 441         while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL)
 442             config = sdscat(config,buf);
 443         if (fp != stdin) fclose(fp);
 444     }
 445     /* Append the additional options */
 446     if (options) {
 447         config = sdscat(config,"\n");
 448         config = sdscat(config,options);
 449     }
 450     loadServerConfigFromString(config);
 451     sdsfree(config);
 452 }
 453
 454 /*-----------------------------------------------------------------------------
 455  * CONFIG command for remote configuration
 456  *----------------------------------------------------------------------------*/
 457
 458 void configSetCommand(redisClient *c) {
 459     robj *o;
 460     long long ll;
 461     redisAssertWithInfo(c,c->argv[2],c->argv[2]->encoding == REDIS_ENCODING_RAW);
 462     redisAssertWithInfo(c,c->argv[2],c->argv[3]->encoding == REDIS_ENCODING_RAW);
 463     o = c->argv[3];
 464
 465     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 466         zfree(server.rdb_filename);
 467         server.rdb_filename = zstrdup(o->ptr);
 468     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 469         if (sdslen(o->ptr) > REDIS_AUTHPASS_MAX_LEN) goto badfmt;
 470         zfree(server.requirepass);
 471         server.requirepass = ((char*)o->ptr)[0] ? zstrdup(o->ptr) : NULL;
 472     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 473         zfree(server.masterauth);
 474         server.masterauth = zstrdup(o->ptr);
 475     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 476         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 477             ll < 0) goto badfmt;
 478         server.maxmemory = ll;
 479         if (server.maxmemory) {
 480             if (server.maxmemory < zmalloc_used_memory()) {
 481                 redisLog(REDIS_WARNING,"WARNING: the new maxmemory value set via CONFIG SET is smaller than the current memory usage. This will result in keys eviction and/or inability to accept new write commands depending on the maxmemory-policy.");
 482             }
 483             freeMemoryIfNeeded();
 484         }
 485     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 486         if (!strcasecmp(o->ptr,"volatile-lru")) {
 487             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 488         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 489             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 490         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 491             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 492         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 493             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 494         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 495             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 496         } else if (!strcasecmp(o->ptr,"noeviction")) {
 497             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 498         } else {
 499             goto badfmt;
 500         }
 501     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 502         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 503             ll <= 0) goto badfmt;
 504         server.maxmemory_samples = ll;
 505     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 506         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 507             ll < 0 || ll > LONG_MAX) goto badfmt;
 508         server.maxidletime = ll;
 509     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 510         if (!strcasecmp(o->ptr,"no")) {
 511             server.aof_fsync = AOF_FSYNC_NO;
 512         } else if (!strcasecmp(o->ptr,"everysec")) {
 513             server.aof_fsync = AOF_FSYNC_EVERYSEC;
 514         } else if (!strcasecmp(o->ptr,"always")) {
 515             server.aof_fsync = AOF_FSYNC_ALWAYS;
 516         } else {
 517             goto badfmt;
 518         }
 519     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 520         int yn = yesnotoi(o->ptr);
 521
 522         if (yn == -1) goto badfmt;
 523         server.aof_no_fsync_on_rewrite = yn;
 524     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 525         int enable = yesnotoi(o->ptr);
 526
 527         if (enable == -1) goto badfmt;
 528         if (enable == 0 && server.aof_state != REDIS_AOF_OFF) {
 529             stopAppendOnly();
 530         } else if (enable && server.aof_state == REDIS_AOF_OFF) {
 531             if (startAppendOnly() == REDIS_ERR) {
 532                 addReplyError(c,
 533                     "Unable to turn on AOF. Check server logs.");
 534                 return;
 535             }
 536         }
 537     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-percentage")) {
 538         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 539         server.aof_rewrite_perc = ll;
 540     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-min-size")) {
 541         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 542         server.aof_rewrite_min_size = ll;
 543     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 544         int vlen, j;
 545         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 546
 547         /* Perform sanity check before setting the new config:
 548          * - Even number of args
 549          * - Seconds >= 1, changes >= 0 */
 550         if (vlen & 1) {
 551             sdsfreesplitres(v,vlen);
 552             goto badfmt;
 553         }
 554         for (j = 0; j < vlen; j++) {
 555             char *eptr;
 556             long val;
 557
 558             val = strtoll(v[j], &eptr, 10);
 559             if (eptr[0] != '\0' ||
 560                 ((j & 1) == 0 && val < 1) ||
 561                 ((j & 1) == 1 && val < 0)) {
 562                 sdsfreesplitres(v,vlen);
 563                 goto badfmt;
 564             }
 565         }
 566         /* Finally set the new config */
 567         resetServerSaveParams();
 568         for (j = 0; j < vlen; j += 2) {
 569             time_t seconds;
 570             int changes;
 571
 572             seconds = strtoll(v[j],NULL,10);
 573             changes = strtoll(v[j+1],NULL,10);
 574             appendServerSaveParams(seconds, changes);
 575         }
 576         sdsfreesplitres(v,vlen);
 577     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 578         int yn = yesnotoi(o->ptr);
 579
 580         if (yn == -1) goto badfmt;
 581         server.repl_serve_stale_data = yn;
 582     } else if (!strcasecmp(c->argv[2]->ptr,"slave-read-only")) {
 583         int yn = yesnotoi(o->ptr);
 584
 585         if (yn == -1) goto badfmt;
 586         server.repl_slave_ro = yn;
 587     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 588         if (chdir((char*)o->ptr) == -1) {
 589             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 590             return;
 591         }
 592     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-entries")) {
 593         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 594         server.hash_max_ziplist_entries = ll;
 595     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-value")) {
 596         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 597         server.hash_max_ziplist_value = ll;
 598     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 599         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 600         server.list_max_ziplist_entries = ll;
 601     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 602         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 603         server.list_max_ziplist_value = ll;
 604     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 605         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 606         server.set_max_intset_entries = ll;
 607     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 608         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 609         server.zset_max_ziplist_entries = ll;
 610     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 611         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 612         server.zset_max_ziplist_value = ll;
 613     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
 614         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 615         server.lua_time_limit = ll;
 616     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-log-slower-than")) {
 617         if (getLongLongFromObject(o,&ll) == REDIS_ERR) goto badfmt;
 618         server.slowlog_log_slower_than = ll;
 619     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-max-len")) {
 620         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 621         server.slowlog_max_len = (unsigned)ll;
 622     } else if (!strcasecmp(c->argv[2]->ptr,"loglevel")) {
 623         if (!strcasecmp(o->ptr,"warning")) {
 624             server.verbosity = REDIS_WARNING;
 625         } else if (!strcasecmp(o->ptr,"notice")) {
 626             server.verbosity = REDIS_NOTICE;
 627         } else if (!strcasecmp(o->ptr,"verbose")) {
 628             server.verbosity = REDIS_VERBOSE;
 629         } else if (!strcasecmp(o->ptr,"debug")) {
 630             server.verbosity = REDIS_DEBUG;
 631         } else {
 632             goto badfmt;
 633         }
 634     } else if (!strcasecmp(c->argv[2]->ptr,"client-output-buffer-limit")) {
 635         int vlen, j;
 636         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 637
 638         /* We need a multiple of 4: <class> <hard> <soft> <soft_seconds> */
 639         if (vlen % 4) {
 640             sdsfreesplitres(v,vlen);
 641             goto badfmt;
 642         }
 643
 644         /* Sanity check of single arguments, so that we either refuse the
 645          * whole configuration string or accept it all, even if a single
 646          * error in a single client class is present. */
 647         for (j = 0; j < vlen; j++) {
 648             char *eptr;
 649             long val;
 650
 651             if ((j % 4) == 0) {
 652                 if (getClientLimitClassByName(v[j]) == -1) {
 653                     sdsfreesplitres(v,vlen);
 654                     goto badfmt;
 655                 }
 656             } else {
 657                 val = strtoll(v[j], &eptr, 10);
 658                 if (eptr[0] != '\0' || val < 0) {
 659                     sdsfreesplitres(v,vlen);
 660                     goto badfmt;
 661                 }
 662             }
 663         }
 664         /* Finally set the new config */
 665         for (j = 0; j < vlen; j += 4) {
 666             int class;
 667             unsigned long long hard, soft;
 668             int soft_seconds;
 669
 670             class = getClientLimitClassByName(v[j]);
 671             hard = strtoll(v[j+1],NULL,10);
 672             soft = strtoll(v[j+2],NULL,10);
 673             soft_seconds = strtoll(v[j+3],NULL,10);
 674
 675             server.client_obuf_limits[class].hard_limit_bytes = hard;
 676             server.client_obuf_limits[class].soft_limit_bytes = soft;
 677             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 678         }
 679         sdsfreesplitres(v,vlen);
 680     } else if (!strcasecmp(c->argv[2]->ptr,"stop-writes-on-bgsave-error")) {
 681         int yn = yesnotoi(o->ptr);
 682
 683         if (yn == -1) goto badfmt;
 684         server.stop_writes_on_bgsave_err = yn;
 685     } else if (!strcasecmp(c->argv[2]->ptr,"repl-ping-slave-period")) {
 686         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 687         server.repl_ping_slave_period = ll;
 688     } else if (!strcasecmp(c->argv[2]->ptr,"repl-timeout")) {
 689         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 690         server.repl_timeout = ll;
 691     } else if (!strcasecmp(c->argv[2]->ptr,"watchdog-period")) {
 692         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 693         if (ll)
 694             enableWatchdog(ll);
 695         else
 696             disableWatchdog();
 697     } else if (!strcasecmp(c->argv[2]->ptr,"rdbcompression")) {
 698         int yn = yesnotoi(o->ptr);
 699
 700         if (yn == -1) goto badfmt;
 701         server.rdb_compression = yn;
 702     } else if (!strcasecmp(c->argv[2]->ptr,"rdbchecksum")) {
 703         int yn = yesnotoi(o->ptr);
 704
 705         if (yn == -1) goto badfmt;
 706         server.rdb_checksum = yn;
 707     } else if (!strcasecmp(c->argv[2]->ptr,"slave-priority")) {
 708         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 709             ll <= 0) goto badfmt;
 710         server.slave_priority = ll;
 711     } else {
 712         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 713             (char*)c->argv[2]->ptr);
 714         return;
 715     }
 716     addReply(c,shared.ok);
 717     return;
 718
 719 badfmt: /* Bad format errors */
 720     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 721             (char*)o->ptr,
 722             (char*)c->argv[2]->ptr);
 723 }
 724
 725 #define config_get_string_field(_name,_var) do { \
 726     if (stringmatch(pattern,_name,0)) { \
 727         addReplyBulkCString(c,_name); \
 728         addReplyBulkCString(c,_var ? _var : ""); \
 729         matches++; \
 730     } \
 731 } while(0);
 732
 733 #define config_get_bool_field(_name,_var) do { \
 734     if (stringmatch(pattern,_name,0)) { \
 735         addReplyBulkCString(c,_name); \
 736         addReplyBulkCString(c,_var ? "yes" : "no"); \
 737         matches++; \
 738     } \
 739 } while(0);
 740
 741 #define config_get_numerical_field(_name,_var) do { \
 742     if (stringmatch(pattern,_name,0)) { \
 743         ll2string(buf,sizeof(buf),_var); \
 744         addReplyBulkCString(c,_name); \
 745         addReplyBulkCString(c,buf); \
 746         matches++; \
 747     } \
 748 } while(0);
 749
 750 void configGetCommand(redisClient *c) {
 751     robj *o = c->argv[2];
 752     void *replylen = addDeferredMultiBulkLength(c);
 753     char *pattern = o->ptr;
 754     char buf[128];
 755     int matches = 0;
 756     redisAssertWithInfo(c,o,o->encoding == REDIS_ENCODING_RAW);
 757
 758     /* String values */
 759     config_get_string_field("dbfilename",server.rdb_filename);
 760     config_get_string_field("requirepass",server.requirepass);
 761     config_get_string_field("masterauth",server.requirepass);
 762     config_get_string_field("bind",server.bindaddr);
 763     config_get_string_field("unixsocket",server.unixsocket);
 764     config_get_string_field("logfile",server.logfile);
 765     config_get_string_field("pidfile",server.pidfile);
 766
 767     /* Numerical values */
 768     config_get_numerical_field("maxmemory",server.maxmemory);
 769     config_get_numerical_field("maxmemory-samples",server.maxmemory_samples);
 770     config_get_numerical_field("timeout",server.maxidletime);
 771     config_get_numerical_field("auto-aof-rewrite-percentage",
 772             server.aof_rewrite_perc);
 773     config_get_numerical_field("auto-aof-rewrite-min-size",
 774             server.aof_rewrite_min_size);
 775     config_get_numerical_field("hash-max-ziplist-entries",
 776             server.hash_max_ziplist_entries);
 777     config_get_numerical_field("hash-max-ziplist-value",
 778             server.hash_max_ziplist_value);
 779     config_get_numerical_field("list-max-ziplist-entries",
 780             server.list_max_ziplist_entries);
 781     config_get_numerical_field("list-max-ziplist-value",
 782             server.list_max_ziplist_value);
 783     config_get_numerical_field("set-max-intset-entries",
 784             server.set_max_intset_entries);
 785     config_get_numerical_field("zset-max-ziplist-entries",
 786             server.zset_max_ziplist_entries);
 787     config_get_numerical_field("zset-max-ziplist-value",
 788             server.zset_max_ziplist_value);
 789     config_get_numerical_field("lua-time-limit",server.lua_time_limit);
 790     config_get_numerical_field("slowlog-log-slower-than",
 791             server.slowlog_log_slower_than);
 792     config_get_numerical_field("slowlog-max-len",
 793             server.slowlog_max_len);
 794     config_get_numerical_field("port",server.port);
 795     config_get_numerical_field("databases",server.dbnum);
 796     config_get_numerical_field("repl-ping-slave-period",server.repl_ping_slave_period);
 797     config_get_numerical_field("repl-timeout",server.repl_timeout);
 798     config_get_numerical_field("maxclients",server.maxclients);
 799     config_get_numerical_field("watchdog-period",server.watchdog_period);
 800     config_get_numerical_field("slave-priority",server.slave_priority);
 801
 802     /* Bool (yes/no) values */
 803     config_get_bool_field("no-appendfsync-on-rewrite",
 804             server.aof_no_fsync_on_rewrite);
 805     config_get_bool_field("slave-serve-stale-data",
 806             server.repl_serve_stale_data);
 807     config_get_bool_field("slave-read-only",
 808             server.repl_slave_ro);
 809     config_get_bool_field("stop-writes-on-bgsave-error",
 810             server.stop_writes_on_bgsave_err);
 811     config_get_bool_field("daemonize", server.daemonize);
 812     config_get_bool_field("rdbcompression", server.rdb_compression);
 813     config_get_bool_field("rdbchecksum", server.rdb_checksum);
 814     config_get_bool_field("activerehashing", server.activerehashing);
 815
 816     /* Everything we can't handle with macros follows. */
 817
 818     if (stringmatch(pattern,"appendonly",0)) {
 819         addReplyBulkCString(c,"appendonly");
 820         addReplyBulkCString(c,server.aof_state == REDIS_AOF_OFF ? "no" : "yes");
 821         matches++;
 822     }
 823     if (stringmatch(pattern,"dir",0)) {
 824         char buf[1024];
 825
 826         if (getcwd(buf,sizeof(buf)) == NULL)
 827             buf[0] = '\0';
 828
 829         addReplyBulkCString(c,"dir");
 830         addReplyBulkCString(c,buf);
 831         matches++;
 832     }
 833     if (stringmatch(pattern,"maxmemory-policy",0)) {
 834         char *s;
 835
 836         switch(server.maxmemory_policy) {
 837         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 838         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 839         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 840         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 841         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 842         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 843         default: s = "unknown"; break; /* too harmless to panic */
 844         }
 845         addReplyBulkCString(c,"maxmemory-policy");
 846         addReplyBulkCString(c,s);
 847         matches++;
 848     }
 849     if (stringmatch(pattern,"appendfsync",0)) {
 850         char *policy;
 851
 852         switch(server.aof_fsync) {
 853         case AOF_FSYNC_NO: policy = "no"; break;
 854         case AOF_FSYNC_EVERYSEC: policy = "everysec"; break;
 855         case AOF_FSYNC_ALWAYS: policy = "always"; break;
 856         default: policy = "unknown"; break; /* too harmless to panic */
 857         }
 858         addReplyBulkCString(c,"appendfsync");
 859         addReplyBulkCString(c,policy);
 860         matches++;
 861     }
 862     if (stringmatch(pattern,"save",0)) {
 863         sds buf = sdsempty();
 864         int j;
 865
 866         for (j = 0; j < server.saveparamslen; j++) {
 867             buf = sdscatprintf(buf,"%ld %d",
 868                     server.saveparams[j].seconds,
 869                     server.saveparams[j].changes);
 870             if (j != server.saveparamslen-1)
 871                 buf = sdscatlen(buf," ",1);
 872         }
 873         addReplyBulkCString(c,"save");
 874         addReplyBulkCString(c,buf);
 875         sdsfree(buf);
 876         matches++;
 877     }
 878     if (stringmatch(pattern,"loglevel",0)) {
 879         char *s;
 880
 881         switch(server.verbosity) {
 882         case REDIS_WARNING: s = "warning"; break;
 883         case REDIS_VERBOSE: s = "verbose"; break;
 884         case REDIS_NOTICE: s = "notice"; break;
 885         case REDIS_DEBUG: s = "debug"; break;
 886         default: s = "unknown"; break; /* too harmless to panic */
 887         }
 888         addReplyBulkCString(c,"loglevel");
 889         addReplyBulkCString(c,s);
 890         matches++;
 891     }
 892     if (stringmatch(pattern,"client-output-buffer-limit",0)) {
 893         sds buf = sdsempty();
 894         int j;
 895
 896         for (j = 0; j < REDIS_CLIENT_LIMIT_NUM_CLASSES; j++) {
 897             buf = sdscatprintf(buf,"%s %llu %llu %ld",
 898                     getClientLimitClassName(j),
 899                     server.client_obuf_limits[j].hard_limit_bytes,
 900                     server.client_obuf_limits[j].soft_limit_bytes,
 901                     (long) server.client_obuf_limits[j].soft_limit_seconds);
 902             if (j != REDIS_CLIENT_LIMIT_NUM_CLASSES-1)
 903                 buf = sdscatlen(buf," ",1);
 904         }
 905         addReplyBulkCString(c,"client-output-buffer-limit");
 906         addReplyBulkCString(c,buf);
 907         sdsfree(buf);
 908         matches++;
 909     }
 910     if (stringmatch(pattern,"unixsocketperm",0)) {
 911         char buf[32];
 912         snprintf(buf,sizeof(buf),"%o",server.unixsocketperm);
 913         addReplyBulkCString(c,"unixsocketperm");
 914         addReplyBulkCString(c,buf);
 915         matches++;
 916     }
 917     if (stringmatch(pattern,"slaveof",0)) {
 918         char buf[256];
 919
 920         addReplyBulkCString(c,"slaveof");
 921         if (server.masterhost)
 922             snprintf(buf,sizeof(buf),"%s %d",
 923                 server.masterhost, server.masterport);
 924         else
 925             buf[0] = '\0';
 926         addReplyBulkCString(c,buf);
 927         matches++;
 928     }
 929     setDeferredMultiBulkLength(c,replylen,matches*2);
 930 }
 931
 932 void configCommand(redisClient *c) {
 933     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 934         if (c->argc != 4) goto badarity;
 935         configSetCommand(c);
 936     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 937         if (c->argc != 3) goto badarity;
 938         configGetCommand(c);
 939     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 940         if (c->argc != 2) goto badarity;
 941         server.stat_keyspace_hits = 0;
 942         server.stat_keyspace_misses = 0;
 943         server.stat_numcommands = 0;
 944         server.stat_numconnections = 0;
 945         server.stat_expiredkeys = 0;
 946         server.stat_rejected_conn = 0;
 947         server.stat_fork_time = 0;
 948         server.aof_delayed_fsync = 0;
 949         resetCommandTableStats();
 950         addReply(c,shared.ok);
 951     } else {
 952         addReplyError(c,
 953             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 954     }
 955     return;
 956
 957 badarity:
 958     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 959         (char*) c->argv[1]->ptr);
 960 }