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