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],"slave-read-only") && argc == 2) {
 206             if ((server.repl_slave_ro = yesnotoi(argv[1])) == -1) {
 207                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 208             }
 209         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 210             if ((server.rdb_compression = yesnotoi(argv[1])) == -1) {
 211                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 212             }
 213         } else if (!strcasecmp(argv[0],"rdbchecksum") && argc == 2) {
 214             if ((server.rdb_checksum = yesnotoi(argv[1])) == -1) {
 215                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 216             }
 217         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 218             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 219                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 220             }
 221         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 222             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 223                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 224             }
 225         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 226             int yes;
 227
 228             if ((yes = yesnotoi(argv[1])) == -1) {
 229                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 230             }
 231             server.aof_state = yes ? REDIS_AOF_ON : REDIS_AOF_OFF;
 232         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 233             zfree(server.aof_filename);
 234             server.aof_filename = zstrdup(argv[1]);
 235         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 236                    && argc == 2) {
 237             if ((server.aof_no_fsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 238                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 239             }
 240         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 241             if (!strcasecmp(argv[1],"no")) {
 242                 server.aof_fsync = AOF_FSYNC_NO;
 243             } else if (!strcasecmp(argv[1],"always")) {
 244                 server.aof_fsync = AOF_FSYNC_ALWAYS;
 245             } else if (!strcasecmp(argv[1],"everysec")) {
 246                 server.aof_fsync = AOF_FSYNC_EVERYSEC;
 247             } else {
 248                 err = "argument must be 'no', 'always' or 'everysec'";
 249                 goto loaderr;
 250             }
 251         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-percentage") &&
 252                    argc == 2)
 253         {
 254             server.aof_rewrite_perc = atoi(argv[1]);
 255             if (server.aof_rewrite_perc < 0) {
 256                 err = "Invalid negative percentage for AOF auto rewrite";
 257                 goto loaderr;
 258             }
 259         } else if (!strcasecmp(argv[0],"auto-aof-rewrite-min-size") &&
 260                    argc == 2)
 261         {
 262             server.aof_rewrite_min_size = memtoll(argv[1],NULL);
 263         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 264             server.requirepass = zstrdup(argv[1]);
 265         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 266             zfree(server.pidfile);
 267             server.pidfile = zstrdup(argv[1]);
 268         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 269             zfree(server.rdb_filename);
 270             server.rdb_filename = zstrdup(argv[1]);
 271         } else if (!strcasecmp(argv[0],"hash-max-ziplist-entries") && argc == 2) {
 272             server.hash_max_ziplist_entries = memtoll(argv[1], NULL);
 273         } else if (!strcasecmp(argv[0],"hash-max-ziplist-value") && argc == 2) {
 274             server.hash_max_ziplist_value = memtoll(argv[1], NULL);
 275         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 276             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 277         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
 278             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 279         } else if (!strcasecmp(argv[0],"set-max-intset-entries") && argc == 2) {
 280             server.set_max_intset_entries = memtoll(argv[1], NULL);
 281         } else if (!strcasecmp(argv[0],"zset-max-ziplist-entries") && argc == 2) {
 282             server.zset_max_ziplist_entries = memtoll(argv[1], NULL);
 283         } else if (!strcasecmp(argv[0],"zset-max-ziplist-value") && argc == 2) {
 284             server.zset_max_ziplist_value = memtoll(argv[1], NULL);
 285         } else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
 286             struct redisCommand *cmd = lookupCommand(argv[1]);
 287             int retval;
 288
 289             if (!cmd) {
 290                 err = "No such command in rename-command";
 291                 goto loaderr;
 292             }
 293
 294             /* If the target command name is the emtpy string we just
 295              * remove it from the command table. */
 296             retval = dictDelete(server.commands, argv[1]);
 297             redisAssert(retval == DICT_OK);
 298
 299             /* Otherwise we re-add the command under a different name. */
 300             if (sdslen(argv[2]) != 0) {
 301                 sds copy = sdsdup(argv[2]);
 302
 303                 retval = dictAdd(server.commands, copy, cmd);
 304                 if (retval != DICT_OK) {
 305                     sdsfree(copy);
 306                     err = "Target command name already exists"; goto loaderr;
 307                 }
 308             }
 309         } else if (!strcasecmp(argv[0],"lua-time-limit") && argc == 2) {
 310             server.lua_time_limit = strtoll(argv[1],NULL,10);
 311         } else if (!strcasecmp(argv[0],"slowlog-log-slower-than") &&
 312                    argc == 2)
 313         {
 314             server.slowlog_log_slower_than = strtoll(argv[1],NULL,10);
 315         } else if (!strcasecmp(argv[0],"slowlog-max-len") && argc == 2) {
 316             server.slowlog_max_len = strtoll(argv[1],NULL,10);
 317         } else if (!strcasecmp(argv[0],"client-output-buffer-limit") &&
 318                    argc == 5)
 319         {
 320             int class = getClientLimitClassByName(argv[1]);
 321             unsigned long long hard, soft;
 322             int soft_seconds;
 323
 324             if (class == -1) {
 325                 err = "Unrecognized client limit class";
 326                 goto loaderr;
 327             }
 328             hard = memtoll(argv[2],NULL);
 329             soft = memtoll(argv[3],NULL);
 330             soft_seconds = atoi(argv[4]);
 331             if (soft_seconds < 0) {
 332                 err = "Negative number of seconds in soft limt is invalid";
 333                 goto loaderr;
 334             }
 335             server.client_obuf_limits[class].hard_limit_bytes = hard;
 336             server.client_obuf_limits[class].soft_limit_bytes = soft;
 337             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 338         } else if (!strcasecmp(argv[0],"stop-writes-on-bgsave-error") &&
 339                    argc == 2) {
 340             if ((server.stop_writes_on_bgsave_err = yesnotoi(argv[1])) == -1) {
 341                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 342             }
 343         } else {
 344             err = "Bad directive or wrong number of arguments"; goto loaderr;
 345         }
 346         sdsfreesplitres(argv,argc);
 347     }
 348     sdsfreesplitres(lines,totlines);
 349     return;
 350
 351 loaderr:
 352     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 353     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 354     fprintf(stderr, ">>> '%s'\n", lines[i]);
 355     fprintf(stderr, "%s\n", err);
 356     exit(1);
 357 }
 358
 359 /* Load the server configuration from the specified filename.
 360  * The function appends the additional configuration directives stored
 361  * in the 'options' string to the config file before loading.
 362  *
 363  * Both filename and options can be NULL, in such a case are considered
 364  * emtpy. This way loadServerConfig can be used to just load a file or
 365  * just load a string. */
 366 void loadServerConfig(char *filename, char *options) {
 367     sds config = sdsempty();
 368     char buf[REDIS_CONFIGLINE_MAX+1];
 369
 370     /* Load the file content */
 371     if (filename) {
 372         FILE *fp;
 373
 374         if (filename[0] == '-' && filename[1] == '\0') {
 375             fp = stdin;
 376         } else {
 377             if ((fp = fopen(filename,"r")) == NULL) {
 378                 redisLog(REDIS_WARNING,
 379                     "Fatal error, can't open config file '%s'", filename);
 380                 exit(1);
 381             }
 382         }
 383         while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL)
 384             config = sdscat(config,buf);
 385         if (fp != stdin) fclose(fp);
 386     }
 387     /* Append the additional options */
 388     if (options) {
 389         config = sdscat(config,"\n");
 390         config = sdscat(config,options);
 391     }
 392     loadServerConfigFromString(config);
 393     sdsfree(config);
 394 }
 395
 396 /*-----------------------------------------------------------------------------
 397  * CONFIG command for remote configuration
 398  *----------------------------------------------------------------------------*/
 399
 400 void configSetCommand(redisClient *c) {
 401     robj *o;
 402     long long ll;
 403     redisAssertWithInfo(c,c->argv[2],c->argv[2]->encoding == REDIS_ENCODING_RAW);
 404     redisAssertWithInfo(c,c->argv[2],c->argv[3]->encoding == REDIS_ENCODING_RAW);
 405     o = c->argv[3];
 406
 407     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 408         zfree(server.rdb_filename);
 409         server.rdb_filename = zstrdup(o->ptr);
 410     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 411         zfree(server.requirepass);
 412         server.requirepass = ((char*)o->ptr)[0] ? zstrdup(o->ptr) : NULL;
 413     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 414         zfree(server.masterauth);
 415         server.masterauth = zstrdup(o->ptr);
 416     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 417         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 418             ll < 0) goto badfmt;
 419         server.maxmemory = ll;
 420         if (server.maxmemory) freeMemoryIfNeeded();
 421     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
 422         if (!strcasecmp(o->ptr,"volatile-lru")) {
 423             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
 424         } else if (!strcasecmp(o->ptr,"volatile-random")) {
 425             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_RANDOM;
 426         } else if (!strcasecmp(o->ptr,"volatile-ttl")) {
 427             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_TTL;
 428         } else if (!strcasecmp(o->ptr,"allkeys-lru")) {
 429             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_LRU;
 430         } else if (!strcasecmp(o->ptr,"allkeys-random")) {
 431             server.maxmemory_policy = REDIS_MAXMEMORY_ALLKEYS_RANDOM;
 432         } else if (!strcasecmp(o->ptr,"noeviction")) {
 433             server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
 434         } else {
 435             goto badfmt;
 436         }
 437     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-samples")) {
 438         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 439             ll <= 0) goto badfmt;
 440         server.maxmemory_samples = ll;
 441     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 442         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 443             ll < 0 || ll > LONG_MAX) goto badfmt;
 444         server.maxidletime = ll;
 445     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 446         if (!strcasecmp(o->ptr,"no")) {
 447             server.aof_fsync = AOF_FSYNC_NO;
 448         } else if (!strcasecmp(o->ptr,"everysec")) {
 449             server.aof_fsync = AOF_FSYNC_EVERYSEC;
 450         } else if (!strcasecmp(o->ptr,"always")) {
 451             server.aof_fsync = AOF_FSYNC_ALWAYS;
 452         } else {
 453             goto badfmt;
 454         }
 455     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 456         int yn = yesnotoi(o->ptr);
 457
 458         if (yn == -1) goto badfmt;
 459         server.aof_no_fsync_on_rewrite = yn;
 460     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 461         int enable = yesnotoi(o->ptr);
 462
 463         if (enable == -1) goto badfmt;
 464         if (enable == 0 && server.aof_state != REDIS_AOF_OFF) {
 465             stopAppendOnly();
 466         } else if (enable && server.aof_state == REDIS_AOF_OFF) {
 467             if (startAppendOnly() == REDIS_ERR) {
 468                 addReplyError(c,
 469                     "Unable to turn on AOF. Check server logs.");
 470                 return;
 471             }
 472         }
 473     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-percentage")) {
 474         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 475         server.aof_rewrite_perc = ll;
 476     } else if (!strcasecmp(c->argv[2]->ptr,"auto-aof-rewrite-min-size")) {
 477         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 478         server.aof_rewrite_min_size = ll;
 479     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 480         int vlen, j;
 481         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 482
 483         /* Perform sanity check before setting the new config:
 484          * - Even number of args
 485          * - Seconds >= 1, changes >= 0 */
 486         if (vlen & 1) {
 487             sdsfreesplitres(v,vlen);
 488             goto badfmt;
 489         }
 490         for (j = 0; j < vlen; j++) {
 491             char *eptr;
 492             long val;
 493
 494             val = strtoll(v[j], &eptr, 10);
 495             if (eptr[0] != '\0' ||
 496                 ((j & 1) == 0 && val < 1) ||
 497                 ((j & 1) == 1 && val < 0)) {
 498                 sdsfreesplitres(v,vlen);
 499                 goto badfmt;
 500             }
 501         }
 502         /* Finally set the new config */
 503         resetServerSaveParams();
 504         for (j = 0; j < vlen; j += 2) {
 505             time_t seconds;
 506             int changes;
 507
 508             seconds = strtoll(v[j],NULL,10);
 509             changes = strtoll(v[j+1],NULL,10);
 510             appendServerSaveParams(seconds, changes);
 511         }
 512         sdsfreesplitres(v,vlen);
 513     } else if (!strcasecmp(c->argv[2]->ptr,"slave-serve-stale-data")) {
 514         int yn = yesnotoi(o->ptr);
 515
 516         if (yn == -1) goto badfmt;
 517         server.repl_serve_stale_data = yn;
 518     } else if (!strcasecmp(c->argv[2]->ptr,"slave-read-only")) {
 519         int yn = yesnotoi(o->ptr);
 520
 521         if (yn == -1) goto badfmt;
 522         server.repl_slave_ro = yn;
 523     } else if (!strcasecmp(c->argv[2]->ptr,"dir")) {
 524         if (chdir((char*)o->ptr) == -1) {
 525             addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
 526             return;
 527         }
 528     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-entries")) {
 529         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 530         server.hash_max_ziplist_entries = ll;
 531     } else if (!strcasecmp(c->argv[2]->ptr,"hash-max-ziplist-value")) {
 532         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 533         server.hash_max_ziplist_value = ll;
 534     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-entries")) {
 535         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 536         server.list_max_ziplist_entries = ll;
 537     } else if (!strcasecmp(c->argv[2]->ptr,"list-max-ziplist-value")) {
 538         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 539         server.list_max_ziplist_value = ll;
 540     } else if (!strcasecmp(c->argv[2]->ptr,"set-max-intset-entries")) {
 541         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 542         server.set_max_intset_entries = ll;
 543     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-entries")) {
 544         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 545         server.zset_max_ziplist_entries = ll;
 546     } else if (!strcasecmp(c->argv[2]->ptr,"zset-max-ziplist-value")) {
 547         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 548         server.zset_max_ziplist_value = ll;
 549     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
 550         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 551         server.lua_time_limit = ll;
 552     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-log-slower-than")) {
 553         if (getLongLongFromObject(o,&ll) == REDIS_ERR) goto badfmt;
 554         server.slowlog_log_slower_than = ll;
 555     } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-max-len")) {
 556         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 557         server.slowlog_max_len = (unsigned)ll;
 558     } else if (!strcasecmp(c->argv[2]->ptr,"loglevel")) {
 559         if (!strcasecmp(o->ptr,"warning")) {
 560             server.verbosity = REDIS_WARNING;
 561         } else if (!strcasecmp(o->ptr,"notice")) {
 562             server.verbosity = REDIS_NOTICE;
 563         } else if (!strcasecmp(o->ptr,"verbose")) {
 564             server.verbosity = REDIS_VERBOSE;
 565         } else if (!strcasecmp(o->ptr,"debug")) {
 566             server.verbosity = REDIS_DEBUG;
 567         } else {
 568             goto badfmt;
 569         }
 570     } else if (!strcasecmp(c->argv[2]->ptr,"client-output-buffer-limit")) {
 571         int vlen, j;
 572         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 573
 574         /* We need a multiple of 4: <class> <hard> <soft> <soft_seconds> */
 575         if (vlen % 4) {
 576             sdsfreesplitres(v,vlen);
 577             goto badfmt;
 578         }
 579
 580         /* Sanity check of single arguments, so that we either refuse the
 581          * whole configuration string or accept it all, even if a single
 582          * error in a single client class is present. */
 583         for (j = 0; j < vlen; j++) {
 584             char *eptr;
 585             long val;
 586
 587             if ((j % 4) == 0) {
 588                 if (getClientLimitClassByName(v[j]) == -1) {
 589                     sdsfreesplitres(v,vlen);
 590                     goto badfmt;
 591                 }
 592             } else {
 593                 val = strtoll(v[j], &eptr, 10);
 594                 if (eptr[0] != '\0' || val < 0) {
 595                     sdsfreesplitres(v,vlen);
 596                     goto badfmt;
 597                 }
 598             }
 599         }
 600         /* Finally set the new config */
 601         for (j = 0; j < vlen; j += 4) {
 602             int class;
 603             unsigned long long hard, soft;
 604             int soft_seconds;
 605
 606             class = getClientLimitClassByName(v[j]);
 607             hard = strtoll(v[j+1],NULL,10);
 608             soft = strtoll(v[j+2],NULL,10);
 609             soft_seconds = strtoll(v[j+3],NULL,10);
 610
 611             server.client_obuf_limits[class].hard_limit_bytes = hard;
 612             server.client_obuf_limits[class].soft_limit_bytes = soft;
 613             server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
 614         }
 615         sdsfreesplitres(v,vlen);
 616     } else if (!strcasecmp(c->argv[2]->ptr,"stop-writes-on-bgsave-error")) {
 617         int yn = yesnotoi(o->ptr);
 618
 619         if (yn == -1) goto badfmt;
 620         server.stop_writes_on_bgsave_err = yn;
 621     } else if (!strcasecmp(c->argv[2]->ptr,"repl-ping-slave-period")) {
 622         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 623         server.repl_ping_slave_period = ll;
 624     } else if (!strcasecmp(c->argv[2]->ptr,"repl-timeout")) {
 625         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll <= 0) goto badfmt;
 626         server.repl_timeout = ll;
 627     } else if (!strcasecmp(c->argv[2]->ptr,"watchdog-period")) {
 628         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
 629         if (ll)
 630             enableWatchdog(ll);
 631         else
 632             disableWatchdog();
 633     } else if (!strcasecmp(c->argv[2]->ptr,"rdbcompression")) {
 634         int yn = yesnotoi(o->ptr);
 635
 636         if (yn == -1) goto badfmt;
 637         server.rdb_compression = yn;
 638     } else if (!strcasecmp(c->argv[2]->ptr,"rdbchecksum")) {
 639         int yn = yesnotoi(o->ptr);
 640
 641         if (yn == -1) goto badfmt;
 642         server.rdb_checksum = yn;
 643     } else {
 644         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
 645             (char*)c->argv[2]->ptr);
 646         return;
 647     }
 648     addReply(c,shared.ok);
 649     return;
 650
 651 badfmt: /* Bad format errors */
 652     addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
 653             (char*)o->ptr,
 654             (char*)c->argv[2]->ptr);
 655 }
 656
 657 #define config_get_string_field(_name,_var) do { \
 658     if (stringmatch(pattern,_name,0)) { \
 659         addReplyBulkCString(c,_name); \
 660         addReplyBulkCString(c,_var ? _var : ""); \
 661         matches++; \
 662     } \
 663 } while(0);
 664
 665 #define config_get_bool_field(_name,_var) do { \
 666     if (stringmatch(pattern,_name,0)) { \
 667         addReplyBulkCString(c,_name); \
 668         addReplyBulkCString(c,_var ? "yes" : "no"); \
 669         matches++; \
 670     } \
 671 } while(0);
 672
 673 #define config_get_numerical_field(_name,_var) do { \
 674     if (stringmatch(pattern,_name,0)) { \
 675         ll2string(buf,sizeof(buf),_var); \
 676         addReplyBulkCString(c,_name); \
 677         addReplyBulkCString(c,buf); \
 678         matches++; \
 679     } \
 680 } while(0);
 681
 682 void configGetCommand(redisClient *c) {
 683     robj *o = c->argv[2];
 684     void *replylen = addDeferredMultiBulkLength(c);
 685     char *pattern = o->ptr;
 686     char buf[128];
 687     int matches = 0;
 688     redisAssertWithInfo(c,o,o->encoding == REDIS_ENCODING_RAW);
 689
 690     /* String values */
 691     config_get_string_field("dbfilename",server.rdb_filename);
 692     config_get_string_field("requirepass",server.requirepass);
 693     config_get_string_field("masterauth",server.requirepass);
 694     config_get_string_field("bind",server.bindaddr);
 695     config_get_string_field("unixsocket",server.unixsocket);
 696     config_get_string_field("logfile",server.logfile);
 697     config_get_string_field("pidfile",server.pidfile);
 698
 699     /* Numerical values */
 700     config_get_numerical_field("maxmemory",server.maxmemory);
 701     config_get_numerical_field("maxmemory-samples",server.maxmemory_samples);
 702     config_get_numerical_field("timeout",server.maxidletime);
 703     config_get_numerical_field("auto-aof-rewrite-percentage",
 704             server.aof_rewrite_perc);
 705     config_get_numerical_field("auto-aof-rewrite-min-size",
 706             server.aof_rewrite_min_size);
 707     config_get_numerical_field("hash-max-ziplist-entries",
 708             server.hash_max_ziplist_entries);
 709     config_get_numerical_field("hash-max-ziplist-value",
 710             server.hash_max_ziplist_value);
 711     config_get_numerical_field("list-max-ziplist-entries",
 712             server.list_max_ziplist_entries);
 713     config_get_numerical_field("list-max-ziplist-value",
 714             server.list_max_ziplist_value);
 715     config_get_numerical_field("set-max-intset-entries",
 716             server.set_max_intset_entries);
 717     config_get_numerical_field("zset-max-ziplist-entries",
 718             server.zset_max_ziplist_entries);
 719     config_get_numerical_field("zset-max-ziplist-value",
 720             server.zset_max_ziplist_value);
 721     config_get_numerical_field("lua-time-limit",server.lua_time_limit);
 722     config_get_numerical_field("slowlog-log-slower-than",
 723             server.slowlog_log_slower_than);
 724     config_get_numerical_field("slowlog-max-len",
 725             server.slowlog_max_len);
 726     config_get_numerical_field("port",server.port);
 727     config_get_numerical_field("databases",server.dbnum);
 728     config_get_numerical_field("repl-ping-slave-period",server.repl_ping_slave_period);
 729     config_get_numerical_field("repl-timeout",server.repl_timeout);
 730     config_get_numerical_field("maxclients",server.maxclients);
 731     config_get_numerical_field("watchdog-period",server.watchdog_period);
 732
 733     /* Bool (yes/no) values */
 734     config_get_bool_field("no-appendfsync-on-rewrite",
 735             server.aof_no_fsync_on_rewrite);
 736     config_get_bool_field("slave-serve-stale-data",
 737             server.repl_serve_stale_data);
 738     config_get_bool_field("slave-read-only",
 739             server.repl_slave_ro);
 740     config_get_bool_field("stop-writes-on-bgsave-error",
 741             server.stop_writes_on_bgsave_err);
 742     config_get_bool_field("daemonize", server.daemonize);
 743     config_get_bool_field("rdbcompression", server.rdb_compression);
 744     config_get_bool_field("rdbchecksum", server.rdb_checksum);
 745     config_get_bool_field("activerehashing", server.activerehashing);
 746
 747     /* Everything we can't handle with macros follows. */
 748
 749     if (stringmatch(pattern,"appendonly",0)) {
 750         addReplyBulkCString(c,"appendonly");
 751         addReplyBulkCString(c,server.aof_state == REDIS_AOF_OFF ? "no" : "yes");
 752         matches++;
 753     }
 754     if (stringmatch(pattern,"dir",0)) {
 755         char buf[1024];
 756
 757         if (getcwd(buf,sizeof(buf)) == NULL)
 758             buf[0] = '\0';
 759
 760         addReplyBulkCString(c,"dir");
 761         addReplyBulkCString(c,buf);
 762         matches++;
 763     }
 764     if (stringmatch(pattern,"maxmemory-policy",0)) {
 765         char *s;
 766
 767         switch(server.maxmemory_policy) {
 768         case REDIS_MAXMEMORY_VOLATILE_LRU: s = "volatile-lru"; break;
 769         case REDIS_MAXMEMORY_VOLATILE_TTL: s = "volatile-ttl"; break;
 770         case REDIS_MAXMEMORY_VOLATILE_RANDOM: s = "volatile-random"; break;
 771         case REDIS_MAXMEMORY_ALLKEYS_LRU: s = "allkeys-lru"; break;
 772         case REDIS_MAXMEMORY_ALLKEYS_RANDOM: s = "allkeys-random"; break;
 773         case REDIS_MAXMEMORY_NO_EVICTION: s = "noeviction"; break;
 774         default: s = "unknown"; break; /* too harmless to panic */
 775         }
 776         addReplyBulkCString(c,"maxmemory-policy");
 777         addReplyBulkCString(c,s);
 778         matches++;
 779     }
 780     if (stringmatch(pattern,"appendfsync",0)) {
 781         char *policy;
 782
 783         switch(server.aof_fsync) {
 784         case AOF_FSYNC_NO: policy = "no"; break;
 785         case AOF_FSYNC_EVERYSEC: policy = "everysec"; break;
 786         case AOF_FSYNC_ALWAYS: policy = "always"; break;
 787         default: policy = "unknown"; break; /* too harmless to panic */
 788         }
 789         addReplyBulkCString(c,"appendfsync");
 790         addReplyBulkCString(c,policy);
 791         matches++;
 792     }
 793     if (stringmatch(pattern,"save",0)) {
 794         sds buf = sdsempty();
 795         int j;
 796
 797         for (j = 0; j < server.saveparamslen; j++) {
 798             buf = sdscatprintf(buf,"%ld %d",
 799                     server.saveparams[j].seconds,
 800                     server.saveparams[j].changes);
 801             if (j != server.saveparamslen-1)
 802                 buf = sdscatlen(buf," ",1);
 803         }
 804         addReplyBulkCString(c,"save");
 805         addReplyBulkCString(c,buf);
 806         sdsfree(buf);
 807         matches++;
 808     }
 809     if (stringmatch(pattern,"loglevel",0)) {
 810         char *s;
 811
 812         switch(server.verbosity) {
 813         case REDIS_WARNING: s = "warning"; break;
 814         case REDIS_VERBOSE: s = "verbose"; break;
 815         case REDIS_NOTICE: s = "notice"; break;
 816         case REDIS_DEBUG: s = "debug"; break;
 817         default: s = "unknown"; break; /* too harmless to panic */
 818         }
 819         addReplyBulkCString(c,"loglevel");
 820         addReplyBulkCString(c,s);
 821         matches++;
 822     }
 823     if (stringmatch(pattern,"client-output-buffer-limit",0)) {
 824         sds buf = sdsempty();
 825         int j;
 826
 827         for (j = 0; j < REDIS_CLIENT_LIMIT_NUM_CLASSES; j++) {
 828             buf = sdscatprintf(buf,"%s %llu %llu %ld",
 829                     getClientLimitClassName(j),
 830                     server.client_obuf_limits[j].hard_limit_bytes,
 831                     server.client_obuf_limits[j].soft_limit_bytes,
 832                     (long) server.client_obuf_limits[j].soft_limit_seconds);
 833             if (j != REDIS_CLIENT_LIMIT_NUM_CLASSES-1)
 834                 buf = sdscatlen(buf," ",1);
 835         }
 836         addReplyBulkCString(c,"client-output-buffer-limit");
 837         addReplyBulkCString(c,buf);
 838         sdsfree(buf);
 839         matches++;
 840     }
 841     if (stringmatch(pattern,"unixsocketperm",0)) {
 842         char buf[32];
 843         snprintf(buf,sizeof(buf),"%o",server.unixsocketperm);
 844         addReplyBulkCString(c,"unixsocketperm");
 845         addReplyBulkCString(c,buf);
 846         matches++;
 847     }
 848     if (stringmatch(pattern,"slaveof",0)) {
 849         char buf[256];
 850
 851         addReplyBulkCString(c,"slaveof");
 852         if (server.masterhost)
 853             snprintf(buf,sizeof(buf),"%s %d",
 854                 server.masterhost, server.masterport);
 855         else
 856             buf[0] = '\0';
 857         addReplyBulkCString(c,buf);
 858         matches++;
 859     }
 860     setDeferredMultiBulkLength(c,replylen,matches*2);
 861 }
 862
 863 void configCommand(redisClient *c) {
 864     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 865         if (c->argc != 4) goto badarity;
 866         configSetCommand(c);
 867     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 868         if (c->argc != 3) goto badarity;
 869         configGetCommand(c);
 870     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 871         if (c->argc != 2) goto badarity;
 872         server.stat_keyspace_hits = 0;
 873         server.stat_keyspace_misses = 0;
 874         server.stat_numcommands = 0;
 875         server.stat_numconnections = 0;
 876         server.stat_expiredkeys = 0;
 877         server.stat_rejected_conn = 0;
 878         server.stat_fork_time = 0;
 879         server.aof_delayed_fsync = 0;
 880         resetCommandTableStats();
 881         addReply(c,shared.ok);
 882     } else {
 883         addReplyError(c,
 884             "CONFIG subcommand must be one of GET, SET, RESETSTAT");
 885     }
 886     return;
 887
 888 badarity:
 889     addReplyErrorFormat(c,"Wrong number of arguments for CONFIG %s",
 890         (char*) c->argv[1]->ptr);
 891 }