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],"lua-time-limit") && argc == 2) {
 348             server.lua_time_limit = strtoll(argv[1],NULL,10);
 349         } else if (!strcasecmp(argv[0],"slowlog-log-slower-than") &&
 350                    argc == 2)
 351         {
 352             server.slowlog_log_slower_than = strtoll(argv[1],NULL,10);
 353         } else if (!strcasecmp(argv[0],"slowlog-max-len") && argc == 2) {
 354             server.slowlog_max_len = strtoll(argv[1],NULL,10);
 355         } else if (!strcasecmp(argv[0],"client-output-buffer-limit") &&
 356                    argc == 5)
 357         {
 358             int class = getClientLimitClassByName(argv[1]);
 359             unsigned long long hard, soft;
 360             int soft_seconds;
 361
 362             if (class == -1) {
 363                 err = "Unrecognized client limit class";
 364                 goto loaderr;
 365             }
 366             hard = memtoll(argv[2],NULL);
 367             soft = memtoll(argv[3],NULL);
 368             soft_seconds = atoi(argv[4]);
 369             if (soft_seconds < 0) {
 370                 err = "Negative number of seconds in soft limt is invalid";
 371                 goto loaderr;
 372             }
 373             server.client_obuf_limits[class].hard_limit_bytes = hard;
 374             server.client_obuf_limits[class].soft_limit_bytes = soft;
 375             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 376         } else if (!strcasecmp(argv[0],"stop-writes-on-bgsave-error") &&
 377                    argc == 2) {
 378             if ((server.stop_writes_on_bgsave_err = yesnotoi(argv[1])) == -1) {
 379                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 380             }
 381         } else if (!strcasecmp(argv[0],"slave-priority") && argc == 2) {
 382             server.slave_priority = atoi(argv[1]);
 383         } else if (!strcasecmp(argv[0],"sentinel")) {
 384             /* argc == 1 is handled by main() as we need to enter the sentinel
 385              * mode ASAP. */
 386             if (argc != 1) {
 387                 if (!server.sentinel_mode) {
 388                     err = "sentinel directive while not in sentinel mode";
 389                     goto loaderr;
 390                 }
 391                 err = sentinelHandleConfiguration(argv+1,argc-1);
 392                 if (err) goto loaderr;
 393             }
 394         } else {
 395             err = "Bad directive or wrong number of arguments"; goto loaderr;
 396         }
 397         sdsfreesplitres(argv,argc);
 398     }
 399     sdsfreesplitres(lines,totlines);
 400     return;
 401
 402 loaderr:
 403     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 404     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 405     fprintf(stderr, ">>> '%s'\n", lines[i]);
 406     fprintf(stderr, "%s\n", err);
 407     exit(1);
 408 }
 409
 410 /* Load the server configuration from the specified filename.
 411  * The function appends the additional configuration directives stored
 412  * in the 'options' string to the config file before loading.
 413  *
 414  * Both filename and options can be NULL, in such a case are considered
 415  * emtpy. This way loadServerConfig can be used to just load a file or
 416  * just load a string. */
 417 void loadServerConfig(char *filename, char *options) {
 418     sds config = sdsempty();
 419     char buf[REDIS_CONFIGLINE_MAX+1];
 420
 421     /* Load the file content */
 422     if (filename) {
 423         FILE *fp;
 424
 425         if (filename[0] == '-' && filename[1] == '\0') {
 426             fp = stdin;
 427         } else {
 428             if ((fp = fopen(filename,"r")) == NULL) {
 429                 redisLog(REDIS_WARNING,
 430                     "Fatal error, can't open config file '%s'", filename);
 431                 exit(1);
 432             }
 433         }
 434         while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL)
 435             config = sdscat(config,buf);
 436         if (fp != stdin) fclose(fp);
 437     }
 438     /* Append the additional options */
 439     if (options) {
 440         config = sdscat(config,"\n");
 441         config = sdscat(config,options);
 442     }
 443     loadServerConfigFromString(config);
 444     sdsfree(config);
 445 }
 446
 447 /*-----------------------------------------------------------------------------
 448  * CONFIG command for remote configuration
 449  *----------------------------------------------------------------------------*/
 450
 451 void configSetCommand(redisClient *c) {
 452     robj *o;
 453     long long ll;
 454     redisAssertWithInfo(c,c->argv[2],c->argv[2]->encoding == REDIS_ENCODING_RAW);
 455     redisAssertWithInfo(c,c->argv[2],c->argv[3]->encoding == REDIS_ENCODING_RAW);
 456     o = c->argv[3];
 457
 458     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 459         zfree(server.rdb_filename);
 460         server.rdb_filename = zstrdup(o->ptr);
 461     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 462         if (sdslen(o->ptr) > REDIS_AUTHPASS_MAX_LEN) goto badfmt;
 463         zfree(server.requirepass);
 464         server.requirepass = ((char*)o->ptr)[0] ? zstrdup(o->ptr) : NULL;
 465     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 466         zfree(server.masterauth);
 467         server.masterauth = zstrdup(o->ptr);
 468     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 469         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 470             ll < 0) goto badfmt;
 471         server.maxmemory = ll;
 472         if (server.maxmemory) {
 473             if (server.maxmemory < zmalloc_used_memory()) {
 474                 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.");
 475             }
 476             freeMemoryIfNeeded();
 477         }
 478     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 479         if (!strcasecmp(o->ptr,"volatile-lru")) {
 480             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 481         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 482             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 483         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 484             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 485         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 486             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 487         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 488             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 489         } else if (!strcasecmp(o->ptr,"noeviction")) {
 490             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 491         } else {
 492             goto badfmt;
 493         }
 494     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 495         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 496             ll <= 0) goto badfmt;
 497         server.maxmemory_samples = ll;
 498     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 499         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 500             ll < 0 || ll > LONG_MAX) goto badfmt;
 501         server.maxidletime = ll;
 502     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 503         if (!strcasecmp(o->ptr,"no")) {
 504             server.aof_fsync = AOF_FSYNC_NO;
 505         } else if (!strcasecmp(o->ptr,"everysec")) {
 506             server.aof_fsync = AOF_FSYNC_EVERYSEC;
 507         } else if (!strcasecmp(o->ptr,"always")) {
 508             server.aof_fsync = AOF_FSYNC_ALWAYS;
 509         } else {
 510             goto badfmt;
 511         }
 512     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 513         int yn = yesnotoi(o->ptr);
 514
 515         if (yn == -1) goto badfmt;
 516         server.aof_no_fsync_on_rewrite = yn;
 517     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 518         int enable = yesnotoi(o->ptr);
 519
 520         if (enable == -1) goto badfmt;
 521         if (enable == 0 && server.aof_state != REDIS_AOF_OFF) {
 522             stopAppendOnly();
 523         } else if (enable && server.aof_state == REDIS_AOF_OFF) {
 524             if (startAppendOnly() == REDIS_ERR) {
 525                 addReplyError(c,
 526                     "Unable to turn on AOF. Check server logs.");
 527                 return;
 528             }
 529         }
 530     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-percentage")) {
 531         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 532         server.aof_rewrite_perc = ll;
 533     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-min-size")) {
 534         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 535         server.aof_rewrite_min_size = ll;
 536     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 537         int vlen, j;
 538         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 539
 540         /* Perform sanity check before setting the new config:
 541          * - Even number of args
 542          * - Seconds >= 1, changes >= 0 */
 543         if (vlen & 1) {
 544             sdsfreesplitres(v,vlen);
 545             goto badfmt;
 546         }
 547         for (j = 0; j < vlen; j++) {
 548             char *eptr;
 549             long val;
 550
 551             val = strtoll(v[j], &eptr, 10);
 552             if (eptr[0] != '\0' ||
 553                 ((j & 1) == 0 && val < 1) ||
 554                 ((j & 1) == 1 && val < 0)) {
 555                 sdsfreesplitres(v,vlen);
 556                 goto badfmt;
 557             }
 558         }
 559         /* Finally set the new config */
 560         resetServerSaveParams();
 561         for (j = 0; j < vlen; j += 2) {
 562             time_t seconds;
 563             int changes;
 564
 565             seconds = strtoll(v[j],NULL,10);
 566             changes = strtoll(v[j+1],NULL,10);
 567             appendServerSaveParams(seconds, changes);
 568         }
 569         sdsfreesplitres(v,vlen);
 570     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 571         int yn = yesnotoi(o->ptr);
 572
 573         if (yn == -1) goto badfmt;
 574         server.repl_serve_stale_data = yn;
 575     } else if (!strcasecmp(c->argv[2]->ptr,"slave-read-only")) {
 576         int yn = yesnotoi(o->ptr);
 577
 578         if (yn == -1) goto badfmt;
 579         server.repl_slave_ro = yn;
 580     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 581         if (chdir((char*)o->ptr) == -1) {
 582             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 583             return;
 584         }
 585     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-entries")) {
 586         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 587         server.hash_max_ziplist_entries = ll;
 588     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-value")) {
 589         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 590         server.hash_max_ziplist_value = ll;
 591     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 592         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 593         server.list_max_ziplist_entries = ll;
 594     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 595         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 596         server.list_max_ziplist_value = ll;
 597     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 598         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 599         server.set_max_intset_entries = ll;
 600     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 601         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 602         server.zset_max_ziplist_entries = ll;
 603     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 604         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 605         server.zset_max_ziplist_value = ll;
 606     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
 607         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 608         server.lua_time_limit = ll;
 609     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-log-slower-than")) {
 610         if (getLongLongFromObject(o,&ll) == REDIS_ERR) goto badfmt;
 611         server.slowlog_log_slower_than = ll;
 612     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-max-len")) {
 613         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 614         server.slowlog_max_len = (unsigned)ll;
 615     } else if (!strcasecmp(c->argv[2]->ptr,"loglevel")) {
 616         if (!strcasecmp(o->ptr,"warning")) {
 617             server.verbosity = REDIS_WARNING;
 618         } else if (!strcasecmp(o->ptr,"notice")) {
 619             server.verbosity = REDIS_NOTICE;
 620         } else if (!strcasecmp(o->ptr,"verbose")) {
 621             server.verbosity = REDIS_VERBOSE;
 622         } else if (!strcasecmp(o->ptr,"debug")) {
 623             server.verbosity = REDIS_DEBUG;
 624         } else {
 625             goto badfmt;
 626         }
 627     } else if (!strcasecmp(c->argv[2]->ptr,"client-output-buffer-limit")) {
 628         int vlen, j;
 629         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 630
 631         /* We need a multiple of 4: <class> <hard> <soft> <soft_seconds> */
 632         if (vlen % 4) {
 633             sdsfreesplitres(v,vlen);
 634             goto badfmt;
 635         }
 636
 637         /* Sanity check of single arguments, so that we either refuse the
 638          * whole configuration string or accept it all, even if a single
 639          * error in a single client class is present. */
 640         for (j = 0; j < vlen; j++) {
 641             char *eptr;
 642             long val;
 643
 644             if ((j % 4) == 0) {
 645                 if (getClientLimitClassByName(v[j]) == -1) {
 646                     sdsfreesplitres(v,vlen);
 647                     goto badfmt;
 648                 }
 649             } else {
 650                 val = strtoll(v[j], &eptr, 10);
 651                 if (eptr[0] != '\0' || val < 0) {
 652                     sdsfreesplitres(v,vlen);
 653                     goto badfmt;
 654                 }
 655             }
 656         }
 657         /* Finally set the new config */
 658         for (j = 0; j < vlen; j += 4) {
 659             int class;
 660             unsigned long long hard, soft;
 661             int soft_seconds;
 662
 663             class = getClientLimitClassByName(v[j]);
 664             hard = strtoll(v[j+1],NULL,10);
 665             soft = strtoll(v[j+2],NULL,10);
 666             soft_seconds = strtoll(v[j+3],NULL,10);
 667
 668             server.client_obuf_limits[class].hard_limit_bytes = hard;
 669             server.client_obuf_limits[class].soft_limit_bytes = soft;
 670             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 671         }
 672         sdsfreesplitres(v,vlen);
 673     } else if (!strcasecmp(c->argv[2]->ptr,"stop-writes-on-bgsave-error")) {
 674         int yn = yesnotoi(o->ptr);
 675
 676         if (yn == -1) goto badfmt;
 677         server.stop_writes_on_bgsave_err = yn;
 678     } else if (!strcasecmp(c->argv[2]->ptr,"repl-ping-slave-period")) {
 679         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 680         server.repl_ping_slave_period = ll;
 681     } else if (!strcasecmp(c->argv[2]->ptr,"repl-timeout")) {
 682         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 683         server.repl_timeout = ll;
 684     } else if (!strcasecmp(c->argv[2]->ptr,"watchdog-period")) {
 685         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 686         if (ll)
 687             enableWatchdog(ll);
 688         else
 689             disableWatchdog();
 690     } else if (!strcasecmp(c->argv[2]->ptr,"rdbcompression")) {
 691         int yn = yesnotoi(o->ptr);
 692
 693         if (yn == -1) goto badfmt;
 694         server.rdb_compression = yn;
 695     } else if (!strcasecmp(c->argv[2]->ptr,"rdbchecksum")) {
 696         int yn = yesnotoi(o->ptr);
 697
 698         if (yn == -1) goto badfmt;
 699         server.rdb_checksum = yn;
 700     } else if (!strcasecmp(c->argv[2]->ptr,"slave-priority")) {
 701         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 702             ll <= 0) goto badfmt;
 703         server.slave_priority = ll;
 704     } else {
 705         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 706             (char*)c->argv[2]->ptr);
 707         return;
 708     }
 709     addReply(c,shared.ok);
 710     return;
 711
 712 badfmt: /* Bad format errors */
 713     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 714             (char*)o->ptr,
 715             (char*)c->argv[2]->ptr);
 716 }
 717
 718 #define config_get_string_field(_name,_var) do { \
 719     if (stringmatch(pattern,_name,0)) { \
 720         addReplyBulkCString(c,_name); \
 721         addReplyBulkCString(c,_var ? _var : ""); \
 722         matches++; \
 723     } \
 724 } while(0);
 725
 726 #define config_get_bool_field(_name,_var) do { \
 727     if (stringmatch(pattern,_name,0)) { \
 728         addReplyBulkCString(c,_name); \
 729         addReplyBulkCString(c,_var ? "yes" : "no"); \
 730         matches++; \
 731     } \
 732 } while(0);
 733
 734 #define config_get_numerical_field(_name,_var) do { \
 735     if (stringmatch(pattern,_name,0)) { \
 736         ll2string(buf,sizeof(buf),_var); \
 737         addReplyBulkCString(c,_name); \
 738         addReplyBulkCString(c,buf); \
 739         matches++; \
 740     } \
 741 } while(0);
 742
 743 void configGetCommand(redisClient *c) {
 744     robj *o = c->argv[2];
 745     void *replylen = addDeferredMultiBulkLength(c);
 746     char *pattern = o->ptr;
 747     char buf[128];
 748     int matches = 0;
 749     redisAssertWithInfo(c,o,o->encoding == REDIS_ENCODING_RAW);
 750
 751     /* String values */
 752     config_get_string_field("dbfilename",server.rdb_filename);
 753     config_get_string_field("requirepass",server.requirepass);
 754     config_get_string_field("masterauth",server.requirepass);
 755     config_get_string_field("bind",server.bindaddr);
 756     config_get_string_field("unixsocket",server.unixsocket);
 757     config_get_string_field("logfile",server.logfile);
 758     config_get_string_field("pidfile",server.pidfile);
 759
 760     /* Numerical values */
 761     config_get_numerical_field("maxmemory",server.maxmemory);
 762     config_get_numerical_field("maxmemory-samples",server.maxmemory_samples);
 763     config_get_numerical_field("timeout",server.maxidletime);
 764     config_get_numerical_field("auto-aof-rewrite-percentage",
 765             server.aof_rewrite_perc);
 766     config_get_numerical_field("auto-aof-rewrite-min-size",
 767             server.aof_rewrite_min_size);
 768     config_get_numerical_field("hash-max-ziplist-entries",
 769             server.hash_max_ziplist_entries);
 770     config_get_numerical_field("hash-max-ziplist-value",
 771             server.hash_max_ziplist_value);
 772     config_get_numerical_field("list-max-ziplist-entries",
 773             server.list_max_ziplist_entries);
 774     config_get_numerical_field("list-max-ziplist-value",
 775             server.list_max_ziplist_value);
 776     config_get_numerical_field("set-max-intset-entries",
 777             server.set_max_intset_entries);
 778     config_get_numerical_field("zset-max-ziplist-entries",
 779             server.zset_max_ziplist_entries);
 780     config_get_numerical_field("zset-max-ziplist-value",
 781             server.zset_max_ziplist_value);
 782     config_get_numerical_field("lua-time-limit",server.lua_time_limit);
 783     config_get_numerical_field("slowlog-log-slower-than",
 784             server.slowlog_log_slower_than);
 785     config_get_numerical_field("slowlog-max-len",
 786             server.slowlog_max_len);
 787     config_get_numerical_field("port",server.port);
 788     config_get_numerical_field("databases",server.dbnum);
 789     config_get_numerical_field("repl-ping-slave-period",server.repl_ping_slave_period);
 790     config_get_numerical_field("repl-timeout",server.repl_timeout);
 791     config_get_numerical_field("maxclients",server.maxclients);
 792     config_get_numerical_field("watchdog-period",server.watchdog_period);
 793     config_get_numerical_field("slave-priority",server.slave_priority);
 794
 795     /* Bool (yes/no) values */
 796     config_get_bool_field("no-appendfsync-on-rewrite",
 797             server.aof_no_fsync_on_rewrite);
 798     config_get_bool_field("slave-serve-stale-data",
 799             server.repl_serve_stale_data);
 800     config_get_bool_field("slave-read-only",
 801             server.repl_slave_ro);
 802     config_get_bool_field("stop-writes-on-bgsave-error",
 803             server.stop_writes_on_bgsave_err);
 804     config_get_bool_field("daemonize", server.daemonize);
 805     config_get_bool_field("rdbcompression", server.rdb_compression);
 806     config_get_bool_field("rdbchecksum", server.rdb_checksum);
 807     config_get_bool_field("activerehashing", server.activerehashing);
 808
 809     /* Everything we can't handle with macros follows. */
 810
 811     if (stringmatch(pattern,"appendonly",0)) {
 812         addReplyBulkCString(c,"appendonly");
 813         addReplyBulkCString(c,server.aof_state == REDIS_AOF_OFF ? "no" : "yes");
 814         matches++;
 815     }
 816     if (stringmatch(pattern,"dir",0)) {
 817         char buf[1024];
 818
 819         if (getcwd(buf,sizeof(buf)) == NULL)
 820             buf[0] = '\0';
 821
 822         addReplyBulkCString(c,"dir");
 823         addReplyBulkCString(c,buf);
 824         matches++;
 825     }
 826     if (stringmatch(pattern,"maxmemory-policy",0)) {
 827         char *s;
 828
 829         switch(server.maxmemory_policy) {
 830         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 831         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 832         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 833         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 834         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 835         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 836         default: s = "unknown"; break; /* too harmless to panic */
 837         }
 838         addReplyBulkCString(c,"maxmemory-policy");
 839         addReplyBulkCString(c,s);
 840         matches++;
 841     }
 842     if (stringmatch(pattern,"appendfsync",0)) {
 843         char *policy;
 844
 845         switch(server.aof_fsync) {
 846         case AOF_FSYNC_NO: policy = "no"; break;
 847         case AOF_FSYNC_EVERYSEC: policy = "everysec"; break;
 848         case AOF_FSYNC_ALWAYS: policy = "always"; break;
 849         default: policy = "unknown"; break; /* too harmless to panic */
 850         }
 851         addReplyBulkCString(c,"appendfsync");
 852         addReplyBulkCString(c,policy);
 853         matches++;
 854     }
 855     if (stringmatch(pattern,"save",0)) {
 856         sds buf = sdsempty();
 857         int j;
 858
 859         for (j = 0; j < server.saveparamslen; j++) {
 860             buf = sdscatprintf(buf,"%ld %d",
 861                     server.saveparams[j].seconds,
 862                     server.saveparams[j].changes);
 863             if (j != server.saveparamslen-1)
 864                 buf = sdscatlen(buf," ",1);
 865         }
 866         addReplyBulkCString(c,"save");
 867         addReplyBulkCString(c,buf);
 868         sdsfree(buf);
 869         matches++;
 870     }
 871     if (stringmatch(pattern,"loglevel",0)) {
 872         char *s;
 873
 874         switch(server.verbosity) {
 875         case REDIS_WARNING: s = "warning"; break;
 876         case REDIS_VERBOSE: s = "verbose"; break;
 877         case REDIS_NOTICE: s = "notice"; break;
 878         case REDIS_DEBUG: s = "debug"; break;
 879         default: s = "unknown"; break; /* too harmless to panic */
 880         }
 881         addReplyBulkCString(c,"loglevel");
 882         addReplyBulkCString(c,s);
 883         matches++;
 884     }
 885     if (stringmatch(pattern,"client-output-buffer-limit",0)) {
 886         sds buf = sdsempty();
 887         int j;
 888
 889         for (j = 0; j < REDIS_CLIENT_LIMIT_NUM_CLASSES; j++) {
 890             buf = sdscatprintf(buf,"%s %llu %llu %ld",
 891                     getClientLimitClassName(j),
 892                     server.client_obuf_limits[j].hard_limit_bytes,
 893                     server.client_obuf_limits[j].soft_limit_bytes,
 894                     (long) server.client_obuf_limits[j].soft_limit_seconds);
 895             if (j != REDIS_CLIENT_LIMIT_NUM_CLASSES-1)
 896                 buf = sdscatlen(buf," ",1);
 897         }
 898         addReplyBulkCString(c,"client-output-buffer-limit");
 899         addReplyBulkCString(c,buf);
 900         sdsfree(buf);
 901         matches++;
 902     }
 903     if (stringmatch(pattern,"unixsocketperm",0)) {
 904         char buf[32];
 905         snprintf(buf,sizeof(buf),"%o",server.unixsocketperm);
 906         addReplyBulkCString(c,"unixsocketperm");
 907         addReplyBulkCString(c,buf);
 908         matches++;
 909     }
 910     if (stringmatch(pattern,"slaveof",0)) {
 911         char buf[256];
 912
 913         addReplyBulkCString(c,"slaveof");
 914         if (server.masterhost)
 915             snprintf(buf,sizeof(buf),"%s %d",
 916                 server.masterhost, server.masterport);
 917         else
 918             buf[0] = '\0';
 919         addReplyBulkCString(c,buf);
 920         matches++;
 921     }
 922     setDeferredMultiBulkLength(c,replylen,matches*2);
 923 }
 924
 925 void configCommand(redisClient *c) {
 926     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 927         if (c->argc != 4) goto badarity;
 928         configSetCommand(c);
 929     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 930         if (c->argc != 3) goto badarity;
 931         configGetCommand(c);
 932     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 933         if (c->argc != 2) goto badarity;
 934         server.stat_keyspace_hits = 0;
 935         server.stat_keyspace_misses = 0;
 936         server.stat_numcommands = 0;
 937         server.stat_numconnections = 0;
 938         server.stat_expiredkeys = 0;
 939         server.stat_rejected_conn = 0;
 940         server.stat_fork_time = 0;
 941         server.aof_delayed_fsync = 0;
 942         resetCommandTableStats();
 943         addReply(c,shared.ok);
 944     } else {
 945         addReplyError(c,
 946             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 947     }
 948     return;
 949
 950 badarity:
 951     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 952         (char*) c->argv[1]->ptr);
 953 }