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 /* I agree, this is a very rudimental way to load a configuration...
  27    will improve later if the config gets more complex */
  28 void loadServerConfig(char *filename) {
  29     FILE *fp;
  30     char buf[REDIS_CONFIGLINE_MAX+1], *err = NULL;
  31     int linenum = 0;
  32     sds line = NULL;
  33
  34     if (filename[0] == '-' && filename[1] == '\0')
  35         fp = stdin;
  36     else {
  37         if ((fp = fopen(filename,"r")) == NULL) {
  38             redisLog(REDIS_WARNING, "Fatal error, can't open config file '%s'", filename);
  39             exit(1);
  40         }
  41     }
  42
  43     while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL) {
  44         sds *argv;
  45         int argc, j;
  46
  47         linenum++;
  48         line = sdsnew(buf);
  49         line = sdstrim(line," \t\r\n");
  50
  51         /* Skip comments and blank lines*/
  52         if (line[0] == '#' || line[0] == '\0') {
  53             sdsfree(line);
  54             continue;
  55         }
  56
  57         /* Split into arguments */
  58         argv = sdssplitlen(line,sdslen(line)," ",1,&argc);
  59         sdstolower(argv[0]);
  60
  61         /* Execute config directives */
  62         if (!strcasecmp(argv[0],"timeout") && argc == 2) {
  63             server.maxidletime = atoi(argv[1]);
  64             if (server.maxidletime < 0) {
  65                 err = "Invalid timeout value"; goto loaderr;
  66             }
  67         } else if (!strcasecmp(argv[0],"port") && argc == 2) {
  68             server.port = atoi(argv[1]);
  69             if (server.port < 1 || server.port > 65535) {
  70                 err = "Invalid port"; goto loaderr;
  71             }
  72         } else if (!strcasecmp(argv[0],"bind") && argc == 2) {
  73             server.bindaddr = zstrdup(argv[1]);
  74         } else if (!strcasecmp(argv[0],"save") && argc == 3) {
  75             int seconds = atoi(argv[1]);
  76             int changes = atoi(argv[2]);
  77             if (seconds < 1 || changes < 0) {
  78                 err = "Invalid save parameters"; goto loaderr;
  79             }
  80             appendServerSaveParams(seconds,changes);
  81         } else if (!strcasecmp(argv[0],"dir") && argc == 2) {
  82             if (chdir(argv[1]) == -1) {
  83                 redisLog(REDIS_WARNING,"Can't chdir to '%s': %s",
  84                     argv[1], strerror(errno));
  85                 exit(1);
  86             }
  87         } else if (!strcasecmp(argv[0],"loglevel") && argc == 2) {
  88             if (!strcasecmp(argv[1],"debug")) server.verbosity = REDIS_DEBUG;
  89             else if (!strcasecmp(argv[1],"verbose")) server.verbosity = REDIS_VERBOSE;
  90             else if (!strcasecmp(argv[1],"notice")) server.verbosity = REDIS_NOTICE;
  91             else if (!strcasecmp(argv[1],"warning")) server.verbosity = REDIS_WARNING;
  92             else {
  93                 err = "Invalid log level. Must be one of debug, notice, warning";
  94                 goto loaderr;
  95             }
  96         } else if (!strcasecmp(argv[0],"logfile") && argc == 2) {
  97             FILE *logfp;
  98
  99             server.logfile = zstrdup(argv[1]);
 100             if (!strcasecmp(server.logfile,"stdout")) {
 101                 zfree(server.logfile);
 102                 server.logfile = NULL;
 103             }
 104             if (server.logfile) {
 105                 /* Test if we are able to open the file. The server will not
 106                  * be able to abort just for this problem later... */
 107                 logfp = fopen(server.logfile,"a");
 108                 if (logfp == NULL) {
 109                     err = sdscatprintf(sdsempty(),
 110                         "Can't open the log file: %s", strerror(errno));
 111                     goto loaderr;
 112                 }
 113                 fclose(logfp);
 114             }
 115         } else if (!strcasecmp(argv[0],"databases") && argc == 2) {
 116             server.dbnum = atoi(argv[1]);
 117             if (server.dbnum < 1) {
 118                 err = "Invalid number of databases"; goto loaderr;
 119             }
 120         } else if (!strcasecmp(argv[0],"include") && argc == 2) {
 121             loadServerConfig(argv[1]);
 122         } else if (!strcasecmp(argv[0],"maxclients") && argc == 2) {
 123             server.maxclients = atoi(argv[1]);
 124         } else if (!strcasecmp(argv[0],"maxmemory") && argc == 2) {
 125             server.maxmemory = memtoll(argv[1],NULL);
 126         } else if (!strcasecmp(argv[0],"slaveof") && argc == 3) {
 127             server.masterhost = sdsnew(argv[1]);
 128             server.masterport = atoi(argv[2]);
 129             server.replstate = REDIS_REPL_CONNECT;
 130         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
 131                 server.masterauth = zstrdup(argv[1]);
 132         } else if (!strcasecmp(argv[0],"glueoutputbuf") && argc == 2) {
 133             if ((server.glueoutputbuf = yesnotoi(argv[1])) == -1) {
 134                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 135             }
 136         } else if (!strcasecmp(argv[0],"rdbcompression") && argc == 2) {
 137             if ((server.rdbcompression = yesnotoi(argv[1])) == -1) {
 138                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 139             }
 140         } else if (!strcasecmp(argv[0],"activerehashing") && argc == 2) {
 141             if ((server.activerehashing = yesnotoi(argv[1])) == -1) {
 142                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 143             }
 144         } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
 145             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
 146                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 147             }
 148         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
 149             if ((server.appendonly = yesnotoi(argv[1])) == -1) {
 150                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 151             }
 152         } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
 153             zfree(server.appendfilename);
 154             server.appendfilename = zstrdup(argv[1]);
 155         } else if (!strcasecmp(argv[0],"no-appendfsync-on-rewrite")
 156                    && argc == 2) {
 157             if ((server.no_appendfsync_on_rewrite= yesnotoi(argv[1])) == -1) {
 158                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 159             }
 160         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
 161             if (!strcasecmp(argv[1],"no")) {
 162                 server.appendfsync = APPENDFSYNC_NO;
 163             } else if (!strcasecmp(argv[1],"always")) {
 164                 server.appendfsync = APPENDFSYNC_ALWAYS;
 165             } else if (!strcasecmp(argv[1],"everysec")) {
 166                 server.appendfsync = APPENDFSYNC_EVERYSEC;
 167             } else {
 168                 err = "argument must be 'no', 'always' or 'everysec'";
 169                 goto loaderr;
 170             }
 171         } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
 172             server.requirepass = zstrdup(argv[1]);
 173         } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
 174             zfree(server.pidfile);
 175             server.pidfile = zstrdup(argv[1]);
 176         } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
 177             zfree(server.dbfilename);
 178             server.dbfilename = zstrdup(argv[1]);
 179         } else if (!strcasecmp(argv[0],"vm-enabled") && argc == 2) {
 180             if ((server.vm_enabled = yesnotoi(argv[1])) == -1) {
 181                 err = "argument must be 'yes' or 'no'"; goto loaderr;
 182             }
 183         } else if (!strcasecmp(argv[0],"vm-swap-file") && argc == 2) {
 184             zfree(server.vm_swap_file);
 185             server.vm_swap_file = zstrdup(argv[1]);
 186         } else if (!strcasecmp(argv[0],"vm-max-memory") && argc == 2) {
 187             server.vm_max_memory = memtoll(argv[1],NULL);
 188         } else if (!strcasecmp(argv[0],"vm-page-size") && argc == 2) {
 189             server.vm_page_size = memtoll(argv[1], NULL);
 190         } else if (!strcasecmp(argv[0],"vm-pages") && argc == 2) {
 191             server.vm_pages = memtoll(argv[1], NULL);
 192         } else if (!strcasecmp(argv[0],"vm-max-threads") && argc == 2) {
 193             server.vm_max_threads = strtoll(argv[1], NULL, 10);
 194         } else if (!strcasecmp(argv[0],"hash-max-zipmap-entries") && argc == 2){
 195             server.hash_max_zipmap_entries = memtoll(argv[1], NULL);
 196         } else if (!strcasecmp(argv[0],"hash-max-zipmap-value") && argc == 2){
 197             server.hash_max_zipmap_value = memtoll(argv[1], NULL);
 198         } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
 199             server.list_max_ziplist_entries = memtoll(argv[1], NULL);
 200         } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2){
 201             server.list_max_ziplist_value = memtoll(argv[1], NULL);
 202         } else {
 203             err = "Bad directive or wrong number of arguments"; goto loaderr;
 204         }
 205         for (j = 0; j < argc; j++)
 206             sdsfree(argv[j]);
 207         zfree(argv);
 208         sdsfree(line);
 209     }
 210     if (fp != stdin) fclose(fp);
 211     return;
 212
 213 loaderr:
 214     fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
 215     fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
 216     fprintf(stderr, ">>> '%s'\n", line);
 217     fprintf(stderr, "%s\n", err);
 218     exit(1);
 219 }
 220
 221 /*-----------------------------------------------------------------------------
 222  * CONFIG command for remote configuration
 223  *----------------------------------------------------------------------------*/
 224
 225 void configSetCommand(redisClient *c) {
 226     robj *o = getDecodedObject(c->argv[3]);
 227     long long ll;
 228
 229     if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
 230         zfree(server.dbfilename);
 231         server.dbfilename = zstrdup(o->ptr);
 232     } else if (!strcasecmp(c->argv[2]->ptr,"requirepass")) {
 233         zfree(server.requirepass);
 234         server.requirepass = zstrdup(o->ptr);
 235     } else if (!strcasecmp(c->argv[2]->ptr,"masterauth")) {
 236         zfree(server.masterauth);
 237         server.masterauth = zstrdup(o->ptr);
 238     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
 239         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 240             ll < 0) goto badfmt;
 241         server.maxmemory = ll;
 242     } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
 243         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
 244             ll < 0 || ll > LONG_MAX) goto badfmt;
 245         server.maxidletime = ll;
 246     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
 247         if (!strcasecmp(o->ptr,"no")) {
 248             server.appendfsync = APPENDFSYNC_NO;
 249         } else if (!strcasecmp(o->ptr,"everysec")) {
 250             server.appendfsync = APPENDFSYNC_EVERYSEC;
 251         } else if (!strcasecmp(o->ptr,"always")) {
 252             server.appendfsync = APPENDFSYNC_ALWAYS;
 253         } else {
 254             goto badfmt;
 255         }
 256     } else if (!strcasecmp(c->argv[2]->ptr,"no-appendfsync-on-rewrite")) {
 257         int yn = yesnotoi(o->ptr);
 258
 259         if (yn == -1) goto badfmt;
 260         server.no_appendfsync_on_rewrite = yn;
 261     } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
 262         int old = server.appendonly;
 263         int new = yesnotoi(o->ptr);
 264
 265         if (new == -1) goto badfmt;
 266         if (old != new) {
 267             if (new == 0) {
 268                 stopAppendOnly();
 269             } else {
 270                 if (startAppendOnly() == REDIS_ERR) {
 271                     addReplySds(c,sdscatprintf(sdsempty(),
 272                         "-ERR Unable to turn on AOF. Check server logs.\r\n"));
 273                     decrRefCount(o);
 274                     return;
 275                 }
 276             }
 277         }
 278     } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
 279         int vlen, j;
 280         sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
 281
 282         /* Perform sanity check before setting the new config:
 283          * - Even number of args
 284          * - Seconds >= 1, changes >= 0 */
 285         if (vlen & 1) {
 286             sdsfreesplitres(v,vlen);
 287             goto badfmt;
 288         }
 289         for (j = 0; j < vlen; j++) {
 290             char *eptr;
 291             long val;
 292
 293             val = strtoll(v[j], &eptr, 10);
 294             if (eptr[0] != '\0' ||
 295                 ((j & 1) == 0 && val < 1) ||
 296                 ((j & 1) == 1 && val < 0)) {
 297                 sdsfreesplitres(v,vlen);
 298                 goto badfmt;
 299             }
 300         }
 301         /* Finally set the new config */
 302         resetServerSaveParams();
 303         for (j = 0; j < vlen; j += 2) {
 304             time_t seconds;
 305             int changes;
 306
 307             seconds = strtoll(v[j],NULL,10);
 308             changes = strtoll(v[j+1],NULL,10);
 309             appendServerSaveParams(seconds, changes);
 310         }
 311         sdsfreesplitres(v,vlen);
 312     } else {
 313         addReplySds(c,sdscatprintf(sdsempty(),
 314             "-ERR not supported CONFIG parameter %s\r\n",
 315             (char*)c->argv[2]->ptr));
 316         decrRefCount(o);
 317         return;
 318     }
 319     decrRefCount(o);
 320     addReply(c,shared.ok);
 321     return;
 322
 323 badfmt: /* Bad format errors */
 324     addReplySds(c,sdscatprintf(sdsempty(),
 325         "-ERR invalid argument '%s' for CONFIG SET '%s'\r\n",
 326             (char*)o->ptr,
 327             (char*)c->argv[2]->ptr));
 328     decrRefCount(o);
 329 }
 330
 331 void configGetCommand(redisClient *c) {
 332     robj *o = getDecodedObject(c->argv[2]);
 333     robj *lenobj = createObject(REDIS_STRING,NULL);
 334     char *pattern = o->ptr;
 335     int matches = 0;
 336
 337     addReply(c,lenobj);
 338     decrRefCount(lenobj);
 339
 340     if (stringmatch(pattern,"dbfilename",0)) {
 341         addReplyBulkCString(c,"dbfilename");
 342         addReplyBulkCString(c,server.dbfilename);
 343         matches++;
 344     }
 345     if (stringmatch(pattern,"requirepass",0)) {
 346         addReplyBulkCString(c,"requirepass");
 347         addReplyBulkCString(c,server.requirepass);
 348         matches++;
 349     }
 350     if (stringmatch(pattern,"masterauth",0)) {
 351         addReplyBulkCString(c,"masterauth");
 352         addReplyBulkCString(c,server.masterauth);
 353         matches++;
 354     }
 355     if (stringmatch(pattern,"maxmemory",0)) {
 356         char buf[128];
 357
 358         ll2string(buf,128,server.maxmemory);
 359         addReplyBulkCString(c,"maxmemory");
 360         addReplyBulkCString(c,buf);
 361         matches++;
 362     }
 363     if (stringmatch(pattern,"timeout",0)) {
 364         char buf[128];
 365
 366         ll2string(buf,128,server.maxidletime);
 367         addReplyBulkCString(c,"timeout");
 368         addReplyBulkCString(c,buf);
 369         matches++;
 370     }
 371     if (stringmatch(pattern,"appendonly",0)) {
 372         addReplyBulkCString(c,"appendonly");
 373         addReplyBulkCString(c,server.appendonly ? "yes" : "no");
 374         matches++;
 375     }
 376     if (stringmatch(pattern,"no-appendfsync-on-rewrite",0)) {
 377         addReplyBulkCString(c,"no-appendfsync-on-rewrite");
 378         addReplyBulkCString(c,server.no_appendfsync_on_rewrite ? "yes" : "no");
 379         matches++;
 380     }
 381     if (stringmatch(pattern,"appendfsync",0)) {
 382         char *policy;
 383
 384         switch(server.appendfsync) {
 385         case APPENDFSYNC_NO: policy = "no"; break;
 386         case APPENDFSYNC_EVERYSEC: policy = "everysec"; break;
 387         case APPENDFSYNC_ALWAYS: policy = "always"; break;
 388         default: policy = "unknown"; break; /* too harmless to panic */
 389         }
 390         addReplyBulkCString(c,"appendfsync");
 391         addReplyBulkCString(c,policy);
 392         matches++;
 393     }
 394     if (stringmatch(pattern,"save",0)) {
 395         sds buf = sdsempty();
 396         int j;
 397
 398         for (j = 0; j < server.saveparamslen; j++) {
 399             buf = sdscatprintf(buf,"%ld %d",
 400                     server.saveparams[j].seconds,
 401                     server.saveparams[j].changes);
 402             if (j != server.saveparamslen-1)
 403                 buf = sdscatlen(buf," ",1);
 404         }
 405         addReplyBulkCString(c,"save");
 406         addReplyBulkCString(c,buf);
 407         sdsfree(buf);
 408         matches++;
 409     }
 410     decrRefCount(o);
 411     lenobj->ptr = sdscatprintf(sdsempty(),"*%d\r\n",matches*2);
 412 }
 413
 414 void configCommand(redisClient *c) {
 415     if (!strcasecmp(c->argv[1]->ptr,"set")) {
 416         if (c->argc != 4) goto badarity;
 417         configSetCommand(c);
 418     } else if (!strcasecmp(c->argv[1]->ptr,"get")) {
 419         if (c->argc != 3) goto badarity;
 420         configGetCommand(c);
 421     } else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
 422         if (c->argc != 2) goto badarity;
 423         server.stat_numcommands = 0;
 424         server.stat_numconnections = 0;
 425         server.stat_expiredkeys = 0;
 426         server.stat_starttime = time(NULL);
 427         addReply(c,shared.ok);
 428     } else {
 429         addReplySds(c,sdscatprintf(sdsempty(),
 430             "-ERR CONFIG subcommand must be one of GET, SET, RESETSTAT\r\n"));
 431     }
 432     return;
 433
 434 badarity:
 435     addReplySds(c,sdscatprintf(sdsempty(),
 436         "-ERR Wrong number of arguments for CONFIG %s\r\n",
 437         (char*) c->argv[1]->ptr));
 438 }