src/redis-cli.c

   1 /* Redis CLI (command line interface)
   2  *
   3  * Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  *   * Redistributions of source code must retain the above copyright notice,
  10  *     this list of conditions and the following disclaimer.
  11  *   * Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *   * Neither the name of Redis nor the names of its contributors may be used
  15  *     to endorse or promote products derived from this software without
  16  *     specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "fmacros.h"
  32 #include "version.h"
  33
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <stdlib.h>
  37 #include <unistd.h>
  38 #include <ctype.h>
  39 #include <errno.h>
  40 #include <sys/stat.h>
  41 #include <sys/time.h>
  42 #include <assert.h>
  43
  44 #include "hiredis.h"
  45 #include "sds.h"
  46 #include "zmalloc.h"
  47 #include "linenoise.h"
  48 #include "help.h"
  49
  50 #define REDIS_NOTUSED(V) ((void) V)
  51
  52 #define OUTPUT_STANDARD 0
  53 #define OUTPUT_RAW 1
  54 #define OUTPUT_CSV 2
  55
  56 static redisContext *context;
  57 static struct config {
  58     char *hostip;
  59     int hostport;
  60     char *hostsocket;
  61     long repeat;
  62     long interval;
  63     int dbnum;
  64     int interactive;
  65     int shutdown;
  66     int monitor_mode;
  67     int pubsub_mode;
  68     int latency_mode;
  69     int cluster_mode;
  70     int cluster_reissue_command;
  71     int slave_mode;
  72     int bigkeys;
  73     int stdinarg; /* get last arg from stdin. (-x option) */
  74     char *auth;
  75     int output; /* output mode, see OUTPUT_* defines */
  76     sds mb_delim;
  77     char prompt[128];
  78     char *eval;
  79 } config;
  80
  81 static void usage();
  82 char *redisGitSHA1(void);
  83 char *redisGitDirty(void);
  84
  85 /*------------------------------------------------------------------------------
  86  * Utility functions
  87  *--------------------------------------------------------------------------- */
  88
  89 static long long mstime(void) {
  90     struct timeval tv;
  91     long long mst;
  92
  93     gettimeofday(&tv, NULL);
  94     mst = ((long)tv.tv_sec)*1000;
  95     mst += tv.tv_usec/1000;
  96     return mst;
  97 }
  98
  99 static void cliRefreshPrompt(void) {
 100     int len;
 101
 102     if (config.hostsocket != NULL)
 103         len = snprintf(config.prompt,sizeof(config.prompt),"redis %s",
 104                        config.hostsocket);
 105     else
 106         len = snprintf(config.prompt,sizeof(config.prompt),"redis %s:%d",
 107                        config.hostip, config.hostport);
 108     /* Add [dbnum] if needed */
 109     if (config.dbnum != 0)
 110         len += snprintf(config.prompt+len,sizeof(config.prompt)-len,"[%d]",
 111             config.dbnum);
 112     snprintf(config.prompt+len,sizeof(config.prompt)-len,"> ");
 113 }
 114
 115 /*------------------------------------------------------------------------------
 116  * Help functions
 117  *--------------------------------------------------------------------------- */
 118
 119 #define CLI_HELP_COMMAND 1
 120 #define CLI_HELP_GROUP 2
 121
 122 typedef struct {
 123     int type;
 124     int argc;
 125     sds *argv;
 126     sds full;
 127
 128     /* Only used for help on commands */
 129     struct commandHelp *org;
 130 } helpEntry;
 131
 132 static helpEntry *helpEntries;
 133 static int helpEntriesLen;
 134
 135 static sds cliVersion() {
 136     sds version;
 137     version = sdscatprintf(sdsempty(), "%s", REDIS_VERSION);
 138
 139     /* Add git commit and working tree status when available */
 140     if (strtoll(redisGitSHA1(),NULL,16)) {
 141         version = sdscatprintf(version, " (git:%s", redisGitSHA1());
 142         if (strtoll(redisGitDirty(),NULL,10))
 143             version = sdscatprintf(version, "-dirty");
 144         version = sdscat(version, ")");
 145     }
 146     return version;
 147 }
 148
 149 static void cliInitHelp() {
 150     int commandslen = sizeof(commandHelp)/sizeof(struct commandHelp);
 151     int groupslen = sizeof(commandGroups)/sizeof(char*);
 152     int i, len, pos = 0;
 153     helpEntry tmp;
 154
 155     helpEntriesLen = len = commandslen+groupslen;
 156     helpEntries = malloc(sizeof(helpEntry)*len);
 157
 158     for (i = 0; i < groupslen; i++) {
 159         tmp.argc = 1;
 160         tmp.argv = malloc(sizeof(sds));
 161         tmp.argv[0] = sdscatprintf(sdsempty(),"@%s",commandGroups[i]);
 162         tmp.full = tmp.argv[0];
 163         tmp.type = CLI_HELP_GROUP;
 164         tmp.org = NULL;
 165         helpEntries[pos++] = tmp;
 166     }
 167
 168     for (i = 0; i < commandslen; i++) {
 169         tmp.argv = sdssplitargs(commandHelp[i].name,&tmp.argc);
 170         tmp.full = sdsnew(commandHelp[i].name);
 171         tmp.type = CLI_HELP_COMMAND;
 172         tmp.org = &commandHelp[i];
 173         helpEntries[pos++] = tmp;
 174     }
 175 }
 176
 177 /* Output command help to stdout. */
 178 static void cliOutputCommandHelp(struct commandHelp *help, int group) {
 179     printf("\r\n  \x1b[1m%s\x1b[0m \x1b[90m%s\x1b[0m\r\n", help->name, help->params);
 180     printf("  \x1b[33msummary:\x1b[0m %s\r\n", help->summary);
 181     printf("  \x1b[33msince:\x1b[0m %s\r\n", help->since);
 182     if (group) {
 183         printf("  \x1b[33mgroup:\x1b[0m %s\r\n", commandGroups[help->group]);
 184     }
 185 }
 186
 187 /* Print generic help. */
 188 static void cliOutputGenericHelp() {
 189     sds version = cliVersion();
 190     printf(
 191         "redis-cli %s\r\n"
 192         "Type: \"help @<group>\" to get a list of commands in <group>\r\n"
 193         "      \"help <command>\" for help on <command>\r\n"
 194         "      \"help <tab>\" to get a list of possible help topics\r\n"
 195         "      \"quit\" to exit\r\n",
 196         version
 197     );
 198     sdsfree(version);
 199 }
 200
 201 /* Output all command help, filtering by group or command name. */
 202 static void cliOutputHelp(int argc, char **argv) {
 203     int i, j, len;
 204     int group = -1;
 205     helpEntry *entry;
 206     struct commandHelp *help;
 207
 208     if (argc == 0) {
 209         cliOutputGenericHelp();
 210         return;
 211     } else if (argc > 0 && argv[0][0] == '@') {
 212         len = sizeof(commandGroups)/sizeof(char*);
 213         for (i = 0; i < len; i++) {
 214             if (strcasecmp(argv[0]+1,commandGroups[i]) == 0) {
 215                 group = i;
 216                 break;
 217             }
 218         }
 219     }
 220
 221     assert(argc > 0);
 222     for (i = 0; i < helpEntriesLen; i++) {
 223         entry = &helpEntries[i];
 224         if (entry->type != CLI_HELP_COMMAND) continue;
 225
 226         help = entry->org;
 227         if (group == -1) {
 228             /* Compare all arguments */
 229             if (argc == entry->argc) {
 230                 for (j = 0; j < argc; j++) {
 231                     if (strcasecmp(argv[j],entry->argv[j]) != 0) break;
 232                 }
 233                 if (j == argc) {
 234                     cliOutputCommandHelp(help,1);
 235                 }
 236             }
 237         } else {
 238             if (group == help->group) {
 239                 cliOutputCommandHelp(help,0);
 240             }
 241         }
 242     }
 243     printf("\r\n");
 244 }
 245
 246 static void completionCallback(const char *buf, linenoiseCompletions *lc) {
 247     size_t startpos = 0;
 248     int mask;
 249     int i;
 250     size_t matchlen;
 251     sds tmp;
 252
 253     if (strncasecmp(buf,"help ",5) == 0) {
 254         startpos = 5;
 255         while (isspace(buf[startpos])) startpos++;
 256         mask = CLI_HELP_COMMAND | CLI_HELP_GROUP;
 257     } else {
 258         mask = CLI_HELP_COMMAND;
 259     }
 260
 261     for (i = 0; i < helpEntriesLen; i++) {
 262         if (!(helpEntries[i].type & mask)) continue;
 263
 264         matchlen = strlen(buf+startpos);
 265         if (strncasecmp(buf+startpos,helpEntries[i].full,matchlen) == 0) {
 266             tmp = sdsnewlen(buf,startpos);
 267             tmp = sdscat(tmp,helpEntries[i].full);
 268             linenoiseAddCompletion(lc,tmp);
 269             sdsfree(tmp);
 270         }
 271     }
 272 }
 273
 274 /*------------------------------------------------------------------------------
 275  * Networking / parsing
 276  *--------------------------------------------------------------------------- */
 277
 278 /* Send AUTH command to the server */
 279 static int cliAuth() {
 280     redisReply *reply;
 281     if (config.auth == NULL) return REDIS_OK;
 282
 283     reply = redisCommand(context,"AUTH %s",config.auth);
 284     if (reply != NULL) {
 285         freeReplyObject(reply);
 286         return REDIS_OK;
 287     }
 288     return REDIS_ERR;
 289 }
 290
 291 /* Send SELECT dbnum to the server */
 292 static int cliSelect() {
 293     redisReply *reply;
 294     if (config.dbnum == 0) return REDIS_OK;
 295
 296     reply = redisCommand(context,"SELECT %d",config.dbnum);
 297     if (reply != NULL) {
 298         freeReplyObject(reply);
 299         return REDIS_OK;
 300     }
 301     return REDIS_ERR;
 302 }
 303
 304 /* Connect to the client. If force is not zero the connection is performed
 305  * even if there is already a connected socket. */
 306 static int cliConnect(int force) {
 307     if (context == NULL || force) {
 308         if (context != NULL)
 309             redisFree(context);
 310
 311         if (config.hostsocket == NULL) {
 312             context = redisConnect(config.hostip,config.hostport);
 313         } else {
 314             context = redisConnectUnix(config.hostsocket);
 315         }
 316
 317         if (context->err) {
 318             fprintf(stderr,"Could not connect to Redis at ");
 319             if (config.hostsocket == NULL)
 320                 fprintf(stderr,"%s:%d: %s\n",config.hostip,config.hostport,context->errstr);
 321             else
 322                 fprintf(stderr,"%s: %s\n",config.hostsocket,context->errstr);
 323             redisFree(context);
 324             context = NULL;
 325             return REDIS_ERR;
 326         }
 327
 328         /* Do AUTH and select the right DB. */
 329         if (cliAuth() != REDIS_OK)
 330             return REDIS_ERR;
 331         if (cliSelect() != REDIS_OK)
 332             return REDIS_ERR;
 333     }
 334     return REDIS_OK;
 335 }
 336
 337 static void cliPrintContextError() {
 338     if (context == NULL) return;
 339     fprintf(stderr,"Error: %s\n",context->errstr);
 340 }
 341
 342 static sds cliFormatReplyTTY(redisReply *r, char *prefix) {
 343     sds out = sdsempty();
 344     switch (r->type) {
 345     case REDIS_REPLY_ERROR:
 346         out = sdscatprintf(out,"(error) %s\n", r->str);
 347     break;
 348     case REDIS_REPLY_STATUS:
 349         out = sdscat(out,r->str);
 350         out = sdscat(out,"\n");
 351     break;
 352     case REDIS_REPLY_INTEGER:
 353         out = sdscatprintf(out,"(integer) %lld\n",r->integer);
 354     break;
 355     case REDIS_REPLY_STRING:
 356         /* If you are producing output for the standard output we want
 357         * a more interesting output with quoted characters and so forth */
 358         out = sdscatrepr(out,r->str,r->len);
 359         out = sdscat(out,"\n");
 360     break;
 361     case REDIS_REPLY_NIL:
 362         out = sdscat(out,"(nil)\n");
 363     break;
 364     case REDIS_REPLY_ARRAY:
 365         if (r->elements == 0) {
 366             out = sdscat(out,"(empty list or set)\n");
 367         } else {
 368             unsigned int i, idxlen = 0;
 369             char _prefixlen[16];
 370             char _prefixfmt[16];
 371             sds _prefix;
 372             sds tmp;
 373
 374             /* Calculate chars needed to represent the largest index */
 375             i = r->elements;
 376             do {
 377                 idxlen++;
 378                 i /= 10;
 379             } while(i);
 380
 381             /* Prefix for nested multi bulks should grow with idxlen+2 spaces */
 382             memset(_prefixlen,' ',idxlen+2);
 383             _prefixlen[idxlen+2] = '\0';
 384             _prefix = sdscat(sdsnew(prefix),_prefixlen);
 385
 386             /* Setup prefix format for every entry */
 387             snprintf(_prefixfmt,sizeof(_prefixfmt),"%%s%%%dd) ",idxlen);
 388
 389             for (i = 0; i < r->elements; i++) {
 390                 /* Don't use the prefix for the first element, as the parent
 391                  * caller already prepended the index number. */
 392                 out = sdscatprintf(out,_prefixfmt,i == 0 ? "" : prefix,i+1);
 393
 394                 /* Format the multi bulk entry */
 395                 tmp = cliFormatReplyTTY(r->element[i],_prefix);
 396                 out = sdscatlen(out,tmp,sdslen(tmp));
 397                 sdsfree(tmp);
 398             }
 399             sdsfree(_prefix);
 400         }
 401     break;
 402     default:
 403         fprintf(stderr,"Unknown reply type: %d\n", r->type);
 404         exit(1);
 405     }
 406     return out;
 407 }
 408
 409 static sds cliFormatReplyRaw(redisReply *r) {
 410     sds out = sdsempty(), tmp;
 411     size_t i;
 412
 413     switch (r->type) {
 414     case REDIS_REPLY_NIL:
 415         /* Nothing... */
 416         break;
 417     case REDIS_REPLY_ERROR:
 418         out = sdscatlen(out,r->str,r->len);
 419         out = sdscatlen(out,"\n",1);
 420         break;
 421     case REDIS_REPLY_STATUS:
 422     case REDIS_REPLY_STRING:
 423         out = sdscatlen(out,r->str,r->len);
 424         break;
 425     case REDIS_REPLY_INTEGER:
 426         out = sdscatprintf(out,"%lld",r->integer);
 427         break;
 428     case REDIS_REPLY_ARRAY:
 429         for (i = 0; i < r->elements; i++) {
 430             if (i > 0) out = sdscat(out,config.mb_delim);
 431             tmp = cliFormatReplyRaw(r->element[i]);
 432             out = sdscatlen(out,tmp,sdslen(tmp));
 433             sdsfree(tmp);
 434         }
 435         break;
 436     default:
 437         fprintf(stderr,"Unknown reply type: %d\n", r->type);
 438         exit(1);
 439     }
 440     return out;
 441 }
 442
 443 static sds cliFormatReplyCSV(redisReply *r) {
 444     unsigned int i;
 445
 446     sds out = sdsempty();
 447     switch (r->type) {
 448     case REDIS_REPLY_ERROR:
 449         out = sdscat(out,"ERROR,");
 450         out = sdscatrepr(out,r->str,strlen(r->str));
 451     break;
 452     case REDIS_REPLY_STATUS:
 453         out = sdscatrepr(out,r->str,r->len);
 454     break;
 455     case REDIS_REPLY_INTEGER:
 456         out = sdscatprintf(out,"%lld",r->integer);
 457     break;
 458     case REDIS_REPLY_STRING:
 459         out = sdscatrepr(out,r->str,r->len);
 460     break;
 461     case REDIS_REPLY_NIL:
 462         out = sdscat(out,"NIL\n");
 463     break;
 464     case REDIS_REPLY_ARRAY:
 465         for (i = 0; i < r->elements; i++) {
 466             sds tmp = cliFormatReplyCSV(r->element[i]);
 467             out = sdscatlen(out,tmp,sdslen(tmp));
 468             if (i != r->elements-1) out = sdscat(out,",");
 469             sdsfree(tmp);
 470         }
 471     break;
 472     default:
 473         fprintf(stderr,"Unknown reply type: %d\n", r->type);
 474         exit(1);
 475     }
 476     return out;
 477 }
 478
 479 static int cliReadReply(int output_raw_strings) {
 480     void *_reply;
 481     redisReply *reply;
 482     sds out = NULL;
 483     int output = 1;
 484
 485     if (redisGetReply(context,&_reply) != REDIS_OK) {
 486         if (config.shutdown)
 487             return REDIS_OK;
 488         if (config.interactive) {
 489             /* Filter cases where we should reconnect */
 490             if (context->err == REDIS_ERR_IO && errno == ECONNRESET)
 491                 return REDIS_ERR;
 492             if (context->err == REDIS_ERR_EOF)
 493                 return REDIS_ERR;
 494         }
 495         cliPrintContextError();
 496         exit(1);
 497         return REDIS_ERR; /* avoid compiler warning */
 498     }
 499
 500     reply = (redisReply*)_reply;
 501
 502     /* Check if we need to connect to a different node and reissue the
 503      * request. */
 504     if (config.cluster_mode && reply->type == REDIS_REPLY_ERROR &&
 505         (!strncmp(reply->str,"MOVED",5) || !strcmp(reply->str,"ASK")))
 506     {
 507         char *p = reply->str, *s;
 508         int slot;
 509
 510         output = 0;
 511         /* Comments show the position of the pointer as:
 512          *
 513          * [S] for pointer 's'
 514          * [P] for pointer 'p'
 515          */
 516         s = strchr(p,' ');      /* MOVED[S]3999 127.0.0.1:6381 */
 517         p = strchr(s+1,' ');    /* MOVED[S]3999[P]127.0.0.1:6381 */
 518         *p = '\0';
 519         slot = atoi(s+1);
 520         s = strchr(p+1,':');    /* MOVED 3999[P]127.0.0.1[S]6381 */
 521         *s = '\0';
 522         sdsfree(config.hostip);
 523         config.hostip = sdsnew(p+1);
 524         config.hostport = atoi(s+1);
 525         if (config.interactive)
 526             printf("-> Redirected to slot [%d] located at %s:%d\n",
 527                 slot, config.hostip, config.hostport);
 528         config.cluster_reissue_command = 1;
 529     }
 530
 531     if (output) {
 532         if (output_raw_strings) {
 533             out = cliFormatReplyRaw(reply);
 534         } else {
 535             if (config.output == OUTPUT_RAW) {
 536                 out = cliFormatReplyRaw(reply);
 537                 out = sdscat(out,"\n");
 538             } else if (config.output == OUTPUT_STANDARD) {
 539                 out = cliFormatReplyTTY(reply,"");
 540             } else if (config.output == OUTPUT_CSV) {
 541                 out = cliFormatReplyCSV(reply);
 542                 out = sdscat(out,"\n");
 543             }
 544         }
 545         fwrite(out,sdslen(out),1,stdout);
 546         sdsfree(out);
 547     }
 548     freeReplyObject(reply);
 549     return REDIS_OK;
 550 }
 551
 552 static int cliSendCommand(int argc, char **argv, int repeat) {
 553     char *command = argv[0];
 554     size_t *argvlen;
 555     int j, output_raw;
 556
 557     if (!strcasecmp(command,"help") || !strcasecmp(command,"?")) {
 558         cliOutputHelp(--argc, ++argv);
 559         return REDIS_OK;
 560     }
 561
 562     if (context == NULL) return REDIS_ERR;
 563
 564     output_raw = 0;
 565     if (!strcasecmp(command,"info") ||
 566         (argc == 2 && !strcasecmp(command,"cluster") &&
 567                       (!strcasecmp(argv[1],"nodes") ||
 568                        !strcasecmp(argv[1],"info"))) ||
 569         (argc == 2 && !strcasecmp(command,"client") &&
 570                        !strcasecmp(argv[1],"list")))
 571
 572     {
 573         output_raw = 1;
 574     }
 575
 576     if (!strcasecmp(command,"shutdown")) config.shutdown = 1;
 577     if (!strcasecmp(command,"monitor")) config.monitor_mode = 1;
 578     if (!strcasecmp(command,"subscribe") ||
 579         !strcasecmp(command,"psubscribe")) config.pubsub_mode = 1;
 580
 581     /* Setup argument length */
 582     argvlen = malloc(argc*sizeof(size_t));
 583     for (j = 0; j < argc; j++)
 584         argvlen[j] = sdslen(argv[j]);
 585
 586     while(repeat--) {
 587         redisAppendCommandArgv(context,argc,(const char**)argv,argvlen);
 588         while (config.monitor_mode) {
 589             if (cliReadReply(output_raw) != REDIS_OK) exit(1);
 590             fflush(stdout);
 591         }
 592
 593         if (config.pubsub_mode) {
 594             if (config.output != OUTPUT_RAW)
 595                 printf("Reading messages... (press Ctrl-C to quit)\n");
 596             while (1) {
 597                 if (cliReadReply(output_raw) != REDIS_OK) exit(1);
 598             }
 599         }
 600
 601         if (cliReadReply(output_raw) != REDIS_OK) {
 602             free(argvlen);
 603             return REDIS_ERR;
 604         } else {
 605             /* Store database number when SELECT was successfully executed. */
 606             if (!strcasecmp(command,"select") && argc == 2) {
 607                 config.dbnum = atoi(argv[1]);
 608                 cliRefreshPrompt();
 609             }
 610         }
 611         if (config.interval) usleep(config.interval);
 612         fflush(stdout); /* Make it grep friendly */
 613     }
 614
 615     free(argvlen);
 616     return REDIS_OK;
 617 }
 618
 619 /*------------------------------------------------------------------------------
 620  * User interface
 621  *--------------------------------------------------------------------------- */
 622
 623 static int parseOptions(int argc, char **argv) {
 624     int i;
 625
 626     for (i = 1; i < argc; i++) {
 627         int lastarg = i==argc-1;
 628
 629         if (!strcmp(argv[i],"-h") && !lastarg) {
 630             sdsfree(config.hostip);
 631             config.hostip = sdsnew(argv[++i]);
 632         } else if (!strcmp(argv[i],"-h") && lastarg) {
 633             usage();
 634         } else if (!strcmp(argv[i],"--help")) {
 635             usage();
 636         } else if (!strcmp(argv[i],"-x")) {
 637             config.stdinarg = 1;
 638         } else if (!strcmp(argv[i],"-p") && !lastarg) {
 639             config.hostport = atoi(argv[++i]);
 640         } else if (!strcmp(argv[i],"-s") && !lastarg) {
 641             config.hostsocket = argv[++i];
 642         } else if (!strcmp(argv[i],"-r") && !lastarg) {
 643             config.repeat = strtoll(argv[++i],NULL,10);
 644         } else if (!strcmp(argv[i],"-i") && !lastarg) {
 645             double seconds = atof(argv[++i]);
 646             config.interval = seconds*1000000;
 647         } else if (!strcmp(argv[i],"-n") && !lastarg) {
 648             config.dbnum = atoi(argv[++i]);
 649         } else if (!strcmp(argv[i],"-a") && !lastarg) {
 650             config.auth = argv[++i];
 651         } else if (!strcmp(argv[i],"--raw")) {
 652             config.output = OUTPUT_RAW;
 653         } else if (!strcmp(argv[i],"--csv")) {
 654             config.output = OUTPUT_CSV;
 655         } else if (!strcmp(argv[i],"--latency")) {
 656             config.latency_mode = 1;
 657         } else if (!strcmp(argv[i],"--slave")) {
 658             config.slave_mode = 1;
 659         } else if (!strcmp(argv[i],"--bigkeys")) {
 660             config.bigkeys = 1;
 661         } else if (!strcmp(argv[i],"--eval") && !lastarg) {
 662             config.eval = argv[++i];
 663         } else if (!strcmp(argv[i],"-c")) {
 664             config.cluster_mode = 1;
 665         } else if (!strcmp(argv[i],"-d") && !lastarg) {
 666             sdsfree(config.mb_delim);
 667             config.mb_delim = sdsnew(argv[++i]);
 668         } else if (!strcmp(argv[i],"-v") || !strcmp(argv[i], "--version")) {
 669             sds version = cliVersion();
 670             printf("redis-cli %s\n", version);
 671             sdsfree(version);
 672             exit(0);
 673         } else {
 674             break;
 675         }
 676     }
 677     return i;
 678 }
 679
 680 static sds readArgFromStdin(void) {
 681     char buf[1024];
 682     sds arg = sdsempty();
 683
 684     while(1) {
 685         int nread = read(fileno(stdin),buf,1024);
 686
 687         if (nread == 0) break;
 688         else if (nread == -1) {
 689             perror("Reading from standard input");
 690             exit(1);
 691         }
 692         arg = sdscatlen(arg,buf,nread);
 693     }
 694     return arg;
 695 }
 696
 697 static void usage() {
 698     sds version = cliVersion();
 699     fprintf(stderr,
 700 "redis-cli %s\n"
 701 "\n"
 702 "Usage: redis-cli [OPTIONS] [cmd [arg [arg ...]]]\n"
 703 "  -h <hostname>    Server hostname (default: 127.0.0.1)\n"
 704 "  -p <port>        Server port (default: 6379)\n"
 705 "  -s <socket>      Server socket (overrides hostname and port)\n"
 706 "  -a <password>    Password to use when connecting to the server\n"
 707 "  -r <repeat>      Execute specified command N times\n"
 708 "  -i <interval>    When -r is used, waits <interval> seconds per command.\n"
 709 "                   It is possible to specify sub-second times like -i 0.1.\n"
 710 "  -n <db>          Database number\n"
 711 "  -x               Read last argument from STDIN\n"
 712 "  -d <delimiter>   Multi-bulk delimiter in for raw formatting (default: \\n)\n"
 713 "  -c               Enable cluster mode (follow -ASK and -MOVED redirections)\n"
 714 "  --raw            Use raw formatting for replies (default when STDOUT is not a tty)\n"
 715 "  --latency        Enter a special mode continuously sampling latency.\n"
 716 "  --slave          Simulate a slave showing commands received from the master.\n"
 717 "  --bigkeys        Sample Redis keys looking for big keys.\n"
 718 "  --eval <file>    Send an EVAL command using the Lua script at <file>.\n"
 719 "  --help           Output this help and exit\n"
 720 "  --version        Output version and exit\n"
 721 "\n"
 722 "Examples:\n"
 723 "  cat /etc/passwd | redis-cli -x set mypasswd\n"
 724 "  redis-cli get mypasswd\n"
 725 "  redis-cli -r 100 lpush mylist x\n"
 726 "  redis-cli -r 100 -i 1 info | grep used_memory_human:\n"
 727 "  redis-cli --eval myscript.lua key1 key2 , arg1 arg2 arg3\n"
 728 "  (Note: when using --eval the comma separates KEYS[] from ARGV[] items)\n"
 729 "\n"
 730 "When no command is given, redis-cli starts in interactive mode.\n"
 731 "Type \"help\" in interactive mode for information on available commands.\n"
 732 "\n",
 733         version);
 734     sdsfree(version);
 735     exit(1);
 736 }
 737
 738 /* Turn the plain C strings into Sds strings */
 739 static char **convertToSds(int count, char** args) {
 740   int j;
 741   char **sds = zmalloc(sizeof(char*)*count);
 742
 743   for(j = 0; j < count; j++)
 744     sds[j] = sdsnew(args[j]);
 745
 746   return sds;
 747 }
 748
 749 #define LINE_BUFLEN 4096
 750 static void repl() {
 751     sds historyfile = NULL;
 752     int history = 0;
 753     char *line;
 754     int argc;
 755     sds *argv;
 756
 757     config.interactive = 1;
 758     linenoiseSetCompletionCallback(completionCallback);
 759
 760     /* Only use history when stdin is a tty. */
 761     if (isatty(fileno(stdin))) {
 762         history = 1;
 763
 764         if (getenv("HOME") != NULL) {
 765             historyfile = sdscatprintf(sdsempty(),"%s/.rediscli_history",getenv("HOME"));
 766             linenoiseHistoryLoad(historyfile);
 767         }
 768     }
 769
 770     cliRefreshPrompt();
 771     while((line = linenoise(context ? config.prompt : "not connected> ")) != NULL) {
 772         if (line[0] != '\0') {
 773             argv = sdssplitargs(line,&argc);
 774             if (history) linenoiseHistoryAdd(line);
 775             if (historyfile) linenoiseHistorySave(historyfile);
 776
 777             if (argv == NULL) {
 778                 printf("Invalid argument(s)\n");
 779                 free(line);
 780                 continue;
 781             } else if (argc > 0) {
 782                 if (strcasecmp(argv[0],"quit") == 0 ||
 783                     strcasecmp(argv[0],"exit") == 0)
 784                 {
 785                     exit(0);
 786                 } else if (argc == 3 && !strcasecmp(argv[0],"connect")) {
 787                     sdsfree(config.hostip);
 788                     config.hostip = sdsnew(argv[1]);
 789                     config.hostport = atoi(argv[2]);
 790                     cliConnect(1);
 791                 } else if (argc == 1 && !strcasecmp(argv[0],"clear")) {
 792                     linenoiseClearScreen();
 793                 } else {
 794                     long long start_time = mstime(), elapsed;
 795                     int repeat, skipargs = 0;
 796
 797                     repeat = atoi(argv[0]);
 798                     if (argc > 1 && repeat) {
 799                         skipargs = 1;
 800                     } else {
 801                         repeat = 1;
 802                     }
 803
 804                     while (1) {
 805                         config.cluster_reissue_command = 0;
 806                         if (cliSendCommand(argc-skipargs,argv+skipargs,repeat)
 807                             != REDIS_OK)
 808                         {
 809                             cliConnect(1);
 810
 811                             /* If we still cannot send the command print error.
 812                              * We'll try to reconnect the next time. */
 813                             if (cliSendCommand(argc-skipargs,argv+skipargs,repeat)
 814                                 != REDIS_OK)
 815                                 cliPrintContextError();
 816                         }
 817                         /* Issue the command again if we got redirected in cluster mode */
 818                         if (config.cluster_mode && config.cluster_reissue_command) {
 819                             cliConnect(1);
 820                         } else {
 821                             break;
 822                         }
 823                     }
 824                     elapsed = mstime()-start_time;
 825                     if (elapsed >= 500) {
 826                         printf("(%.2fs)\n",(double)elapsed/1000);
 827                     }
 828                 }
 829             }
 830             /* Free the argument vector */
 831             while(argc--) sdsfree(argv[argc]);
 832             zfree(argv);
 833         }
 834         /* linenoise() returns malloc-ed lines like readline() */
 835         free(line);
 836     }
 837     exit(0);
 838 }
 839
 840 static int noninteractive(int argc, char **argv) {
 841     int retval = 0;
 842     if (config.stdinarg) {
 843         argv = zrealloc(argv, (argc+1)*sizeof(char*));
 844         argv[argc] = readArgFromStdin();
 845         retval = cliSendCommand(argc+1, argv, config.repeat);
 846     } else {
 847         /* stdin is probably a tty, can be tested with S_ISCHR(s.st_mode) */
 848         retval = cliSendCommand(argc, argv, config.repeat);
 849     }
 850     return retval;
 851 }
 852
 853 static int evalMode(int argc, char **argv) {
 854     sds script = sdsempty();
 855     FILE *fp;
 856     char buf[1024];
 857     size_t nread;
 858     char **argv2;
 859     int j, got_comma = 0, keys = 0;
 860
 861     /* Load the script from the file, as an sds string. */
 862     fp = fopen(config.eval,"r");
 863     if (!fp) {
 864         fprintf(stderr,
 865             "Can't open file '%s': %s\n", config.eval, strerror(errno));
 866         exit(1);
 867     }
 868     while((nread = fread(buf,1,sizeof(buf),fp)) != 0) {
 869         script = sdscatlen(script,buf,nread);
 870     }
 871     fclose(fp);
 872
 873     /* Create our argument vector */
 874     argv2 = zmalloc(sizeof(sds)*(argc+3));
 875     argv2[0] = sdsnew("EVAL");
 876     argv2[1] = script;
 877     for (j = 0; j < argc; j++) {
 878         if (!got_comma && argv[j][0] == ',' && argv[j][1] == 0) {
 879             got_comma = 1;
 880             continue;
 881         }
 882         argv2[j+3-got_comma] = sdsnew(argv[j]);
 883         if (!got_comma) keys++;
 884     }
 885     argv2[2] = sdscatprintf(sdsempty(),"%d",keys);
 886
 887     /* Call it */
 888     return cliSendCommand(argc+3-got_comma, argv2, config.repeat);
 889 }
 890
 891 static void latencyMode(void) {
 892     redisReply *reply;
 893     long long start, latency, min = 0, max = 0, tot = 0, count = 0;
 894     double avg;
 895
 896     if (!context) exit(1);
 897     while(1) {
 898         start = mstime();
 899         reply = redisCommand(context,"PING");
 900         if (reply == NULL) {
 901             fprintf(stderr,"\nI/O error\n");
 902             exit(1);
 903         }
 904         latency = mstime()-start;
 905         freeReplyObject(reply);
 906         count++;
 907         if (count == 1) {
 908             min = max = tot = latency;
 909             avg = (double) latency;
 910         } else {
 911             if (latency < min) min = latency;
 912             if (latency > max) max = latency;
 913             tot += latency;
 914             avg = (double) tot/count;
 915         }
 916         printf("\x1b[0G\x1b[2Kmin: %lld, max: %lld, avg: %.2f (%lld samples)",
 917             min, max, avg, count);
 918         fflush(stdout);
 919         usleep(10000);
 920     }
 921 }
 922
 923 static void slaveMode(void) {
 924     /* To start we need to send the SYNC command and return the payload.
 925      * The hiredis client lib does not understand this part of the protocol
 926      * and we don't want to mess with its buffers, so everything is performed
 927      * using direct low-level I/O. */
 928     int fd = context->fd;
 929     char buf[1024], *p;
 930     ssize_t nread;
 931     unsigned long long payload;
 932
 933     /* Send the SYNC command. */
 934     if (write(fd,"SYNC\r\n",6) != 6) {
 935         fprintf(stderr,"Error writing to master\n");
 936         exit(1);
 937     }
 938
 939     /* Read $<payload>\r\n, making sure to read just up to "\n" */
 940     p = buf;
 941     while(1) {
 942         nread = read(fd,p,1);
 943         if (nread <= 0) {
 944             fprintf(stderr,"Error reading bulk length while SYNCing\n");
 945             exit(1);
 946         }
 947         if (*p == '\n') break;
 948         p++;
 949     }
 950     *p = '\0';
 951     payload = strtoull(buf+1,NULL,10);
 952     fprintf(stderr,"SYNC with master, discarding %lld bytes of bulk tranfer...\n",
 953             payload);
 954
 955     /* Discard the payload. */
 956     while(payload) {
 957         nread = read(fd,buf,(payload > sizeof(buf)) ? sizeof(buf) : payload);
 958         if (nread <= 0) {
 959             fprintf(stderr,"Error reading RDB payload while SYNCing\n");
 960             exit(1);
 961         }
 962         payload -= nread;
 963     }
 964     fprintf(stderr,"SYNC done. Logging commands from master.\n");
 965
 966     /* Now we can use the hiredis to read the incoming protocol. */
 967     config.output = OUTPUT_CSV;
 968     while (cliReadReply(0) == REDIS_OK);
 969 }
 970
 971 #define TYPE_STRING 0
 972 #define TYPE_LIST   1
 973 #define TYPE_SET    2
 974 #define TYPE_HASH   3
 975 #define TYPE_ZSET   4
 976
 977 static void findBigKeys(void) {
 978     unsigned long long biggest[5] = {0,0,0,0,0};
 979     unsigned long long samples = 0;
 980     redisReply *reply1, *reply2, *reply3 = NULL;
 981     char *sizecmd, *typename[] = {"string","list","set","hash","zset"};
 982     int type;
 983
 984     printf("\n# Press ctrl+c when you have had enough of it... :)\n");
 985     printf("# You can use -i 0.1 to sleep 0.1 sec every 100 sampled keys\n");
 986     printf("# in order to reduce server load (usually not needed).\n\n");
 987     while(1) {
 988         /* Sample with RANDOMKEY */
 989         reply1 = redisCommand(context,"RANDOMKEY");
 990         if (reply1 == NULL) {
 991             fprintf(stderr,"\nI/O error\n");
 992             exit(1);
 993         } else if (reply1->type == REDIS_REPLY_ERROR) {
 994             fprintf(stderr, "RANDOMKEY error: %s\n",
 995                 reply1->str);
 996             exit(1);
 997         }
 998         /* Get the key type */
 999         reply2 = redisCommand(context,"TYPE %s",reply1->str);
1000         assert(reply2 && reply2->type == REDIS_REPLY_STATUS);
1001         samples++;
1002
1003         /* Get the key "size" */
1004         if (!strcmp(reply2->str,"string")) {
1005             sizecmd = "STRLEN";
1006             type = TYPE_STRING;
1007         } else if (!strcmp(reply2->str,"list")) {
1008             sizecmd = "LLEN";
1009             type = TYPE_LIST;
1010         } else if (!strcmp(reply2->str,"set")) {
1011             sizecmd = "SCARD";
1012             type = TYPE_SET;
1013         } else if (!strcmp(reply2->str,"hash")) {
1014             sizecmd = "HLEN";
1015             type = TYPE_HASH;
1016         } else if (!strcmp(reply2->str,"zset")) {
1017             sizecmd = "ZCARD";
1018             type = TYPE_ZSET;
1019         } else if (!strcmp(reply2->str,"none")) {
1020             freeReplyObject(reply1);
1021             freeReplyObject(reply2);
1022             freeReplyObject(reply3);
1023             continue;
1024         } else {
1025             fprintf(stderr, "Unknown key type '%s' for key '%s'\n",
1026                 reply2->str, reply1->str);
1027             exit(1);
1028         }
1029
1030         reply3 = redisCommand(context,"%s %s", sizecmd, reply1->str);
1031         if (reply3 && reply3->type == REDIS_REPLY_INTEGER) {
1032             if (biggest[type] < reply3->integer) {
1033                 printf("[%6s] %s | biggest so far with size %llu\n",
1034                     typename[type], reply1->str,
1035                     (unsigned long long) reply3->integer);
1036                 biggest[type] = reply3->integer;
1037             }
1038         }
1039
1040         if ((samples % 1000000) == 0)
1041             printf("(%llu keys sampled)\n", samples);
1042
1043         if ((samples % 100) == 0 && config.interval)
1044             usleep(config.interval);
1045
1046         freeReplyObject(reply1);
1047         freeReplyObject(reply2);
1048         if (reply3) freeReplyObject(reply3);
1049     }
1050 }
1051
1052 int main(int argc, char **argv) {
1053     int firstarg;
1054
1055     config.hostip = sdsnew("127.0.0.1");
1056     config.hostport = 6379;
1057     config.hostsocket = NULL;
1058     config.repeat = 1;
1059     config.interval = 0;
1060     config.dbnum = 0;
1061     config.interactive = 0;
1062     config.shutdown = 0;
1063     config.monitor_mode = 0;
1064     config.pubsub_mode = 0;
1065     config.latency_mode = 0;
1066     config.cluster_mode = 0;
1067     config.slave_mode = 0;
1068     config.bigkeys = 0;
1069     config.stdinarg = 0;
1070     config.auth = NULL;
1071     config.eval = NULL;
1072     if (!isatty(fileno(stdout)) && (getenv("FAKETTY") == NULL))
1073         config.output = OUTPUT_RAW;
1074     else
1075         config.output = OUTPUT_STANDARD;
1076     config.mb_delim = sdsnew("\n");
1077     cliInitHelp();
1078
1079     firstarg = parseOptions(argc,argv);
1080     argc -= firstarg;
1081     argv += firstarg;
1082
1083     /* Start in latency mode if appropriate */
1084     if (config.latency_mode) {
1085         cliConnect(0);
1086         latencyMode();
1087     }
1088
1089     /* Start in slave mode if appropriate */
1090     if (config.slave_mode) {
1091         cliConnect(0);
1092         slaveMode();
1093     }
1094
1095     /* Find big keys */
1096     if (config.bigkeys) {
1097         cliConnect(0);
1098         findBigKeys();
1099     }
1100
1101     /* Start interactive mode when no command is provided */
1102     if (argc == 0 && !config.eval) {
1103         /* Note that in repl mode we don't abort on connection error.
1104          * A new attempt will be performed for every command send. */
1105         cliConnect(0);
1106         repl();
1107     }
1108
1109     /* Otherwise, we have some arguments to execute */
1110     if (cliConnect(0) != REDIS_OK) exit(1);
1111     if (config.eval) {
1112         return evalMode(argc,argv);
1113     } else {
1114         return noninteractive(argc,convertToSds(argc,argv));
1115     }
1116 }