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