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 static redisContext *context;
  53 static struct config {
  54     char *hostip;
  55     int hostport;
  56     char *hostsocket;
  57     long repeat;
  58     long interval;
  59     int dbnum;
  60     int interactive;
  61     int shutdown;
  62     int monitor_mode;
  63     int pubsub_mode;
  64     int latency_mode;
  65     int cluster_mode;
  66     int cluster_reissue_command;
  67     int stdinarg; /* get last arg from stdin. (-x option) */
  68     char *auth;
  69     int raw_output; /* output mode per command */
  70     sds mb_delim;
  71     char prompt[32];
  72 } config;
  73
  74 static void usage();
  75 char *redisGitSHA1(void);
  76 char *redisGitDirty(void);
  77
  78 /*------------------------------------------------------------------------------
  79  * Utility functions
  80  *--------------------------------------------------------------------------- */
  81
  82 static long long mstime(void) {
  83     struct timeval tv;
  84     long long mst;
  85
  86     gettimeofday(&tv, NULL);
  87     mst = ((long)tv.tv_sec)*1000;
  88     mst += tv.tv_usec/1000;
  89     return mst;
  90 }
  91
  92 static void cliRefreshPrompt(void) {
  93     if (config.dbnum == 0)
  94         snprintf(config.prompt,sizeof(config.prompt),"redis %s:%d> ",
  95             config.hostip, config.hostport);
  96     else
  97         snprintf(config.prompt,sizeof(config.prompt),"redis %s:%d[%d]> ",
  98             config.hostip, config.hostport, config.dbnum);
  99 }
 100
 101 /*------------------------------------------------------------------------------
 102  * Help functions
 103  *--------------------------------------------------------------------------- */
 104
 105 #define CLI_HELP_COMMAND 1
 106 #define CLI_HELP_GROUP 2
 107
 108 typedef struct {
 109     int type;
 110     int argc;
 111     sds *argv;
 112     sds full;
 113
 114     /* Only used for help on commands */
 115     struct commandHelp *org;
 116 } helpEntry;
 117
 118 static helpEntry *helpEntries;
 119 static int helpEntriesLen;
 120
 121 static sds cliVersion() {
 122     sds version;
 123     version = sdscatprintf(sdsempty(), "%s", REDIS_VERSION);
 124
 125     /* Add git commit and working tree status when available */
 126     if (strtoll(redisGitSHA1(),NULL,16)) {
 127         version = sdscatprintf(version, " (git:%s", redisGitSHA1());
 128         if (strtoll(redisGitDirty(),NULL,10))
 129             version = sdscatprintf(version, "-dirty");
 130         version = sdscat(version, ")");
 131     }
 132     return version;
 133 }
 134
 135 static void cliInitHelp() {
 136     int commandslen = sizeof(commandHelp)/sizeof(struct commandHelp);
 137     int groupslen = sizeof(commandGroups)/sizeof(char*);
 138     int i, len, pos = 0;
 139     helpEntry tmp;
 140
 141     helpEntriesLen = len = commandslen+groupslen;
 142     helpEntries = malloc(sizeof(helpEntry)*len);
 143
 144     for (i = 0; i < groupslen; i++) {
 145         tmp.argc = 1;
 146         tmp.argv = malloc(sizeof(sds));
 147         tmp.argv[0] = sdscatprintf(sdsempty(),"@%s",commandGroups[i]);
 148         tmp.full = tmp.argv[0];
 149         tmp.type = CLI_HELP_GROUP;
 150         tmp.org = NULL;
 151         helpEntries[pos++] = tmp;
 152     }
 153
 154     for (i = 0; i < commandslen; i++) {
 155         tmp.argv = sdssplitargs(commandHelp[i].name,&tmp.argc);
 156         tmp.full = sdsnew(commandHelp[i].name);
 157         tmp.type = CLI_HELP_COMMAND;
 158         tmp.org = &commandHelp[i];
 159         helpEntries[pos++] = tmp;
 160     }
 161 }
 162
 163 /* Output command help to stdout. */
 164 static void cliOutputCommandHelp(struct commandHelp *help, int group) {
 165     printf("\r\n  \x1b[1m%s\x1b[0m \x1b[90m%s\x1b[0m\r\n", help->name, help->params);
 166     printf("  \x1b[33msummary:\x1b[0m %s\r\n", help->summary);
 167     printf("  \x1b[33msince:\x1b[0m %s\r\n", help->since);
 168     if (group) {
 169         printf("  \x1b[33mgroup:\x1b[0m %s\r\n", commandGroups[help->group]);
 170     }
 171 }
 172
 173 /* Print generic help. */
 174 static void cliOutputGenericHelp() {
 175     sds version = cliVersion();
 176     printf(
 177         "redis-cli %s\r\n"
 178         "Type: \"help @<group>\" to get a list of commands in <group>\r\n"
 179         "      \"help <command>\" for help on <command>\r\n"
 180         "      \"help <tab>\" to get a list of possible help topics\r\n"
 181         "      \"quit\" to exit\r\n",
 182         version
 183     );
 184     sdsfree(version);
 185 }
 186
 187 /* Output all command help, filtering by group or command name. */
 188 static void cliOutputHelp(int argc, char **argv) {
 189     int i, j, len;
 190     int group = -1;
 191     helpEntry *entry;
 192     struct commandHelp *help;
 193
 194     if (argc == 0) {
 195         cliOutputGenericHelp();
 196         return;
 197     } else if (argc > 0 && argv[0][0] == '@') {
 198         len = sizeof(commandGroups)/sizeof(char*);
 199         for (i = 0; i < len; i++) {
 200             if (strcasecmp(argv[0]+1,commandGroups[i]) == 0) {
 201                 group = i;
 202                 break;
 203             }
 204         }
 205     }
 206
 207     assert(argc > 0);
 208     for (i = 0; i < helpEntriesLen; i++) {
 209         entry = &helpEntries[i];
 210         if (entry->type != CLI_HELP_COMMAND) continue;
 211
 212         help = entry->org;
 213         if (group == -1) {
 214             /* Compare all arguments */
 215             if (argc == entry->argc) {
 216                 for (j = 0; j < argc; j++) {
 217                     if (strcasecmp(argv[j],entry->argv[j]) != 0) break;
 218                 }
 219                 if (j == argc) {
 220                     cliOutputCommandHelp(help,1);
 221                 }
 222             }
 223         } else {
 224             if (group == help->group) {
 225                 cliOutputCommandHelp(help,0);
 226             }
 227         }
 228     }
 229     printf("\r\n");
 230 }
 231
 232 static void completionCallback(const char *buf, linenoiseCompletions *lc) {
 233     size_t startpos = 0;
 234     int mask;
 235     int i;
 236     size_t matchlen;
 237     sds tmp;
 238
 239     if (strncasecmp(buf,"help ",5) == 0) {
 240         startpos = 5;
 241         while (isspace(buf[startpos])) startpos++;
 242         mask = CLI_HELP_COMMAND | CLI_HELP_GROUP;
 243     } else {
 244         mask = CLI_HELP_COMMAND;
 245     }
 246
 247     for (i = 0; i < helpEntriesLen; i++) {
 248         if (!(helpEntries[i].type & mask)) continue;
 249
 250         matchlen = strlen(buf+startpos);
 251         if (strncasecmp(buf+startpos,helpEntries[i].full,matchlen) == 0) {
 252             tmp = sdsnewlen(buf,startpos);
 253             tmp = sdscat(tmp,helpEntries[i].full);
 254             linenoiseAddCompletion(lc,tmp);
 255             sdsfree(tmp);
 256         }
 257     }
 258 }
 259
 260 /*------------------------------------------------------------------------------
 261  * Networking / parsing
 262  *--------------------------------------------------------------------------- */
 263
 264 /* Send AUTH command to the server */
 265 static int cliAuth() {
 266     redisReply *reply;
 267     if (config.auth == NULL) return REDIS_OK;
 268
 269     reply = redisCommand(context,"AUTH %s",config.auth);
 270     if (reply != NULL) {
 271         freeReplyObject(reply);
 272         return REDIS_OK;
 273     }
 274     return REDIS_ERR;
 275 }
 276
 277 /* Send SELECT dbnum to the server */
 278 static int cliSelect() {
 279     redisReply *reply;
 280     if (config.dbnum == 0) return REDIS_OK;
 281
 282     reply = redisCommand(context,"SELECT %d",config.dbnum);
 283     if (reply != NULL) {
 284         freeReplyObject(reply);
 285         return REDIS_OK;
 286     }
 287     return REDIS_ERR;
 288 }
 289
 290 /* Connect to the client. If force is not zero the connection is performed
 291  * even if there is already a connected socket. */
 292 static int cliConnect(int force) {
 293     if (context == NULL || force) {
 294         if (context != NULL)
 295             redisFree(context);
 296
 297         if (config.hostsocket == NULL) {
 298             context = redisConnect(config.hostip,config.hostport);
 299         } else {
 300             context = redisConnectUnix(config.hostsocket);
 301         }
 302
 303         if (context->err) {
 304             fprintf(stderr,"Could not connect to Redis at ");
 305             if (config.hostsocket == NULL)
 306                 fprintf(stderr,"%s:%d: %s\n",config.hostip,config.hostport,context->errstr);
 307             else
 308                 fprintf(stderr,"%s: %s\n",config.hostsocket,context->errstr);
 309             redisFree(context);
 310             context = NULL;
 311             return REDIS_ERR;
 312         }
 313
 314         /* Do AUTH and select the right DB. */
 315         if (cliAuth() != REDIS_OK)
 316             return REDIS_ERR;
 317         if (cliSelect() != REDIS_OK)
 318             return REDIS_ERR;
 319     }
 320     return REDIS_OK;
 321 }
 322
 323 static void cliPrintContextError() {
 324     if (context == NULL) return;
 325     fprintf(stderr,"Error: %s\n",context->errstr);
 326 }
 327
 328 static sds cliFormatReplyTTY(redisReply *r, char *prefix) {
 329     sds out = sdsempty();
 330     switch (r->type) {
 331     case REDIS_REPLY_ERROR:
 332         out = sdscatprintf(out,"(error) %s\n", r->str);
 333     break;
 334     case REDIS_REPLY_STATUS:
 335         out = sdscat(out,r->str);
 336         out = sdscat(out,"\n");
 337     break;
 338     case REDIS_REPLY_INTEGER:
 339         out = sdscatprintf(out,"(integer) %lld\n",r->integer);
 340     break;
 341     case REDIS_REPLY_STRING:
 342         /* If you are producing output for the standard output we want
 343         * a more interesting output with quoted characters and so forth */
 344         out = sdscatrepr(out,r->str,r->len);
 345         out = sdscat(out,"\n");
 346     break;
 347     case REDIS_REPLY_NIL:
 348         out = sdscat(out,"(nil)\n");
 349     break;
 350     case REDIS_REPLY_ARRAY:
 351         if (r->elements == 0) {
 352             out = sdscat(out,"(empty list or set)\n");
 353         } else {
 354             unsigned int i, idxlen = 0;
 355             char _prefixlen[16];
 356             char _prefixfmt[16];
 357             sds _prefix;
 358             sds tmp;
 359
 360             /* Calculate chars needed to represent the largest index */
 361             i = r->elements;
 362             do {
 363                 idxlen++;
 364                 i /= 10;
 365             } while(i);
 366
 367             /* Prefix for nested multi bulks should grow with idxlen+2 spaces */
 368             memset(_prefixlen,' ',idxlen+2);
 369             _prefixlen[idxlen+2] = '\0';
 370             _prefix = sdscat(sdsnew(prefix),_prefixlen);
 371
 372             /* Setup prefix format for every entry */
 373             snprintf(_prefixfmt,sizeof(_prefixfmt),"%%s%%%dd) ",idxlen);
 374
 375             for (i = 0; i < r->elements; i++) {
 376                 /* Don't use the prefix for the first element, as the parent
 377                  * caller already prepended the index number. */
 378                 out = sdscatprintf(out,_prefixfmt,i == 0 ? "" : prefix,i+1);
 379
 380                 /* Format the multi bulk entry */
 381                 tmp = cliFormatReplyTTY(r->element[i],_prefix);
 382                 out = sdscatlen(out,tmp,sdslen(tmp));
 383                 sdsfree(tmp);
 384             }
 385             sdsfree(_prefix);
 386         }
 387     break;
 388     default:
 389         fprintf(stderr,"Unknown reply type: %d\n", r->type);
 390         exit(1);
 391     }
 392     return out;
 393 }
 394
 395 static sds cliFormatReplyRaw(redisReply *r) {
 396     sds out = sdsempty(), tmp;
 397     size_t i;
 398
 399     switch (r->type) {
 400     case REDIS_REPLY_NIL:
 401         /* Nothing... */
 402         break;
 403     case REDIS_REPLY_ERROR:
 404         out = sdscatlen(out,r->str,r->len);
 405         out = sdscatlen(out,"\n",1);
 406         break;
 407     case REDIS_REPLY_STATUS:
 408     case REDIS_REPLY_STRING:
 409         out = sdscatlen(out,r->str,r->len);
 410         break;
 411     case REDIS_REPLY_INTEGER:
 412         out = sdscatprintf(out,"%lld",r->integer);
 413         break;
 414     case REDIS_REPLY_ARRAY:
 415         for (i = 0; i < r->elements; i++) {
 416             if (i > 0) out = sdscat(out,config.mb_delim);
 417             tmp = cliFormatReplyRaw(r->element[i]);
 418             out = sdscatlen(out,tmp,sdslen(tmp));
 419             sdsfree(tmp);
 420         }
 421         break;
 422     default:
 423         fprintf(stderr,"Unknown reply type: %d\n", r->type);
 424         exit(1);
 425     }
 426     return out;
 427 }
 428
 429 static int cliReadReply(int output_raw_strings) {
 430     void *_reply;
 431     redisReply *reply;
 432     sds out;
 433     int output = 1;
 434
 435     if (redisGetReply(context,&_reply) != REDIS_OK) {
 436         if (config.shutdown)
 437             return REDIS_OK;
 438         if (config.interactive) {
 439             /* Filter cases where we should reconnect */
 440             if (context->err == REDIS_ERR_IO && errno == ECONNRESET)
 441                 return REDIS_ERR;
 442             if (context->err == REDIS_ERR_EOF)
 443                 return REDIS_ERR;
 444         }
 445         cliPrintContextError();
 446         exit(1);
 447         return REDIS_ERR; /* avoid compiler warning */
 448     }
 449
 450     reply = (redisReply*)_reply;
 451
 452     /* Check if we need to connect to a different node and reissue the request. */
 453     if (config.cluster_mode && reply->type == REDIS_REPLY_ERROR &&
 454         (!strncmp(reply->str,"MOVED",5) || !strcmp(reply->str,"ASK")))
 455     {
 456         char *p = reply->str, *s;
 457         int slot;
 458
 459         output = 0;
 460         /* Comments show the position of the pointer as:
 461          *
 462          * [S] for pointer 's'
 463          * [P] for pointer 'p'
 464          */
 465         s = strchr(p,' ');      /* MOVED[S]3999 127.0.0.1:6381 */
 466         p = strchr(s+1,' ');    /* MOVED[S]3999[P]127.0.0.1:6381 */
 467         *p = '\0';
 468         slot = atoi(s+1);
 469         s = strchr(p+1,':');    /* MOVED 3999[P]127.0.0.1[S]6381 */
 470         *s = '\0';
 471         sdsfree(config.hostip);
 472         config.hostip = sdsnew(p+1);
 473         config.hostport = atoi(s+1);
 474         if (config.interactive)
 475             printf("-> Redirected to slot [%d] located at %s:%d\n",
 476                 slot, config.hostip, config.hostport);
 477         config.cluster_reissue_command = 1;
 478     }
 479
 480     if (output) {
 481         if (output_raw_strings) {
 482             out = cliFormatReplyRaw(reply);
 483         } else {
 484             if (config.raw_output) {
 485                 out = cliFormatReplyRaw(reply);
 486                 out = sdscat(out,"\n");
 487             } else {
 488                 out = cliFormatReplyTTY(reply,"");
 489             }
 490         }
 491         fwrite(out,sdslen(out),1,stdout);
 492         sdsfree(out);
 493     }
 494     freeReplyObject(reply);
 495     return REDIS_OK;
 496 }
 497
 498 static int cliSendCommand(int argc, char **argv, int repeat) {
 499     char *command = argv[0];
 500     size_t *argvlen;
 501     int j, output_raw;
 502
 503     if (context == NULL) return REDIS_ERR;
 504
 505     output_raw = 0;
 506     if (!strcasecmp(command,"info") ||
 507         (argc == 2 && !strcasecmp(command,"cluster") &&
 508                       (!strcasecmp(argv[1],"nodes") ||
 509                        !strcasecmp(argv[1],"info"))) ||
 510         (argc == 2 && !strcasecmp(command,"client") &&
 511                        !strcasecmp(argv[1],"list")))
 512
 513     {
 514         output_raw = 1;
 515     }
 516
 517     if (!strcasecmp(command,"help") || !strcasecmp(command,"?")) {
 518         cliOutputHelp(--argc, ++argv);
 519         return REDIS_OK;
 520     }
 521     if (!strcasecmp(command,"shutdown")) config.shutdown = 1;
 522     if (!strcasecmp(command,"monitor")) config.monitor_mode = 1;
 523     if (!strcasecmp(command,"subscribe") ||
 524         !strcasecmp(command,"psubscribe")) config.pubsub_mode = 1;
 525
 526     /* Setup argument length */
 527     argvlen = malloc(argc*sizeof(size_t));
 528     for (j = 0; j < argc; j++)
 529         argvlen[j] = sdslen(argv[j]);
 530
 531     while(repeat--) {
 532         redisAppendCommandArgv(context,argc,(const char**)argv,argvlen);
 533         while (config.monitor_mode) {
 534             if (cliReadReply(output_raw) != REDIS_OK) exit(1);
 535             fflush(stdout);
 536         }
 537
 538         if (config.pubsub_mode) {
 539             if (!config.raw_output)
 540                 printf("Reading messages... (press Ctrl-C to quit)\n");
 541             while (1) {
 542                 if (cliReadReply(output_raw) != REDIS_OK) exit(1);
 543             }
 544         }
 545
 546         if (cliReadReply(output_raw) != REDIS_OK) {
 547             free(argvlen);
 548             return REDIS_ERR;
 549         } else {
 550             /* Store database number when SELECT was successfully executed. */
 551             if (!strcasecmp(command,"select") && argc == 2) {
 552                 config.dbnum = atoi(argv[1]);
 553                 cliRefreshPrompt();
 554             }
 555         }
 556         if (config.interval) usleep(config.interval);
 557         fflush(stdout); /* Make it grep friendly */
 558     }
 559
 560     free(argvlen);
 561     return REDIS_OK;
 562 }
 563
 564 /*------------------------------------------------------------------------------
 565  * User interface
 566  *--------------------------------------------------------------------------- */
 567
 568 static int parseOptions(int argc, char **argv) {
 569     int i;
 570
 571     for (i = 1; i < argc; i++) {
 572         int lastarg = i==argc-1;
 573
 574         if (!strcmp(argv[i],"-h") && !lastarg) {
 575             sdsfree(config.hostip);
 576             config.hostip = sdsnew(argv[i+1]);
 577             i++;
 578         } else if (!strcmp(argv[i],"-h") && lastarg) {
 579             usage();
 580         } else if (!strcmp(argv[i],"--help")) {
 581             usage();
 582         } else if (!strcmp(argv[i],"-x")) {
 583             config.stdinarg = 1;
 584         } else if (!strcmp(argv[i],"-p") && !lastarg) {
 585             config.hostport = atoi(argv[i+1]);
 586             i++;
 587         } else if (!strcmp(argv[i],"-s") && !lastarg) {
 588             config.hostsocket = argv[i+1];
 589             i++;
 590         } else if (!strcmp(argv[i],"-r") && !lastarg) {
 591             config.repeat = strtoll(argv[i+1],NULL,10);
 592             i++;
 593         } else if (!strcmp(argv[i],"-i") && !lastarg) {
 594             double seconds = atof(argv[i+1]);
 595             config.interval = seconds*1000000;
 596             i++;
 597         } else if (!strcmp(argv[i],"-n") && !lastarg) {
 598             config.dbnum = atoi(argv[i+1]);
 599             i++;
 600         } else if (!strcmp(argv[i],"-a") && !lastarg) {
 601             config.auth = argv[i+1];
 602             i++;
 603         } else if (!strcmp(argv[i],"--raw")) {
 604             config.raw_output = 1;
 605         } else if (!strcmp(argv[i],"--latency")) {
 606             config.latency_mode = 1;
 607         } else if (!strcmp(argv[i],"-c")) {
 608             config.cluster_mode = 1;
 609         } else if (!strcmp(argv[i],"-d") && !lastarg) {
 610             sdsfree(config.mb_delim);
 611             config.mb_delim = sdsnew(argv[i+1]);
 612             i++;
 613         } else if (!strcmp(argv[i],"-v") || !strcmp(argv[i], "--version")) {
 614             sds version = cliVersion();
 615             printf("redis-cli %s\n", version);
 616             sdsfree(version);
 617             exit(0);
 618         } else {
 619             break;
 620         }
 621     }
 622     return i;
 623 }
 624
 625 static sds readArgFromStdin(void) {
 626     char buf[1024];
 627     sds arg = sdsempty();
 628
 629     while(1) {
 630         int nread = read(fileno(stdin),buf,1024);
 631
 632         if (nread == 0) break;
 633         else if (nread == -1) {
 634             perror("Reading from standard input");
 635             exit(1);
 636         }
 637         arg = sdscatlen(arg,buf,nread);
 638     }
 639     return arg;
 640 }
 641
 642 static void usage() {
 643     sds version = cliVersion();
 644     fprintf(stderr,
 645 "redis-cli %s\n"
 646 "\n"
 647 "Usage: redis-cli [OPTIONS] [cmd [arg [arg ...]]]\n"
 648 "  -h <hostname>    Server hostname (default: 127.0.0.1)\n"
 649 "  -p <port>        Server port (default: 6379)\n"
 650 "  -s <socket>      Server socket (overrides hostname and port)\n"
 651 "  -a <password>    Password to use when connecting to the server\n"
 652 "  -r <repeat>      Execute specified command N times\n"
 653 "  -i <interval>    When -r is used, waits <interval> seconds per command.\n"
 654 "                   It is possible to specify sub-second times like -i 0.1.\n"
 655 "  -n <db>          Database number\n"
 656 "  -x               Read last argument from STDIN\n"
 657 "  -d <delimiter>   Multi-bulk delimiter in for raw formatting (default: \\n)\n"
 658 "  -c               Enable cluster mode (follow -ASK and -MOVED redirections)\n"
 659 "  --raw            Use raw formatting for replies (default when STDOUT is not a tty)\n"
 660 "  --latency        Enter a special mode continuously sampling latency.\n"
 661 "  --help           Output this help and exit\n"
 662 "  --version        Output version and exit\n"
 663 "\n"
 664 "Examples:\n"
 665 "  cat /etc/passwd | redis-cli -x set mypasswd\n"
 666 "  redis-cli get mypasswd\n"
 667 "  redis-cli -r 100 lpush mylist x\n"
 668 "  redis-cli -r 100 -i 1 info | grep used_memory_human:\n"
 669 "\n"
 670 "When no command is given, redis-cli starts in interactive mode.\n"
 671 "Type \"help\" in interactive mode for information on available commands.\n"
 672 "\n",
 673         version);
 674     sdsfree(version);
 675     exit(1);
 676 }
 677
 678 /* Turn the plain C strings into Sds strings */
 679 static char **convertToSds(int count, char** args) {
 680   int j;
 681   char **sds = zmalloc(sizeof(char*)*count);
 682
 683   for(j = 0; j < count; j++)
 684     sds[j] = sdsnew(args[j]);
 685
 686   return sds;
 687 }
 688
 689 #define LINE_BUFLEN 4096
 690 static void repl() {
 691     sds historyfile = NULL;
 692     int history = 0;
 693     char *line;
 694     int argc;
 695     sds *argv;
 696
 697     config.interactive = 1;
 698     linenoiseSetCompletionCallback(completionCallback);
 699
 700     /* Only use history when stdin is a tty. */
 701     if (isatty(fileno(stdin))) {
 702         history = 1;
 703
 704         if (getenv("HOME") != NULL) {
 705             historyfile = sdscatprintf(sdsempty(),"%s/.rediscli_history",getenv("HOME"));
 706             linenoiseHistoryLoad(historyfile);
 707         }
 708     }
 709
 710     cliRefreshPrompt();
 711     while((line = linenoise(context ? config.prompt : "not connected> ")) != NULL) {
 712         if (line[0] != '\0') {
 713             argv = sdssplitargs(line,&argc);
 714             if (history) linenoiseHistoryAdd(line);
 715             if (historyfile) linenoiseHistorySave(historyfile);
 716
 717             if (argv == NULL) {
 718                 printf("Invalid argument(s)\n");
 719                 continue;
 720             } else if (argc > 0) {
 721                 if (strcasecmp(argv[0],"quit") == 0 ||
 722                     strcasecmp(argv[0],"exit") == 0)
 723                 {
 724                     exit(0);
 725                 } else if (argc == 3 && !strcasecmp(argv[0],"connect")) {
 726                     sdsfree(config.hostip);
 727                     config.hostip = sdsnew(argv[1]);
 728                     config.hostport = atoi(argv[2]);
 729                     cliConnect(1);
 730                 } else if (argc == 1 && !strcasecmp(argv[0],"clear")) {
 731                     linenoiseClearScreen();
 732                 } else {
 733                     long long start_time = mstime(), elapsed;
 734                     int repeat, skipargs = 0;
 735
 736                     repeat = atoi(argv[0]);
 737                     if (argc > 1 && repeat) {
 738                         skipargs = 1;
 739                     } else {
 740                         repeat = 1;
 741                     }
 742
 743                     while (1) {
 744                         config.cluster_reissue_command = 0;
 745                         if (cliSendCommand(argc-skipargs,argv+skipargs,repeat)
 746                             != REDIS_OK)
 747                         {
 748                             cliConnect(1);
 749
 750                             /* If we still cannot send the command print error.
 751                              * We'll try to reconnect the next time. */
 752                             if (cliSendCommand(argc-skipargs,argv+skipargs,repeat)
 753                                 != REDIS_OK)
 754                                 cliPrintContextError();
 755                         }
 756                         /* Issue the command again if we got redirected in cluster mode */
 757                         if (config.cluster_mode && config.cluster_reissue_command) {
 758                             cliConnect(1);
 759                         } else {
 760                             break;
 761                         }
 762                     }
 763                     elapsed = mstime()-start_time;
 764                     if (elapsed >= 500) {
 765                         printf("(%.2fs)\n",(double)elapsed/1000);
 766                     }
 767                 }
 768             }
 769             /* Free the argument vector */
 770             while(argc--) sdsfree(argv[argc]);
 771             zfree(argv);
 772         }
 773         /* linenoise() returns malloc-ed lines like readline() */
 774         free(line);
 775     }
 776     exit(0);
 777 }
 778
 779 static int noninteractive(int argc, char **argv) {
 780     int retval = 0;
 781     if (config.stdinarg) {
 782         argv = zrealloc(argv, (argc+1)*sizeof(char*));
 783         argv[argc] = readArgFromStdin();
 784         retval = cliSendCommand(argc+1, argv, config.repeat);
 785     } else {
 786         /* stdin is probably a tty, can be tested with S_ISCHR(s.st_mode) */
 787         retval = cliSendCommand(argc, argv, config.repeat);
 788     }
 789     return retval;
 790 }
 791
 792 static void latencyMode(void) {
 793     redisReply *reply;
 794     long long start, latency, min, max, tot, count = 0;
 795     double avg;
 796
 797     if (!context) exit(1);
 798     while(1) {
 799         start = mstime();
 800         reply = redisCommand(context,"PING");
 801         if (reply == NULL) {
 802             fprintf(stderr,"\nI/O error\n");
 803             exit(1);
 804         }
 805         latency = mstime()-start;
 806         freeReplyObject(reply);
 807         count++;
 808         if (count == 1) {
 809             min = max = tot = latency;
 810             avg = (double) latency;
 811         } else {
 812             if (latency < min) min = latency;
 813             if (latency > max) max = latency;
 814             tot += latency;
 815             avg = (double) tot/count;
 816         }
 817         printf("\x1b[0G\x1b[2Kmin: %lld, max: %lld, avg: %.2f (%lld samples)",
 818             min, max, avg, count);
 819         fflush(stdout);
 820         usleep(10000);
 821     }
 822 }
 823
 824 int main(int argc, char **argv) {
 825     int firstarg;
 826
 827     config.hostip = sdsnew("127.0.0.1");
 828     config.hostport = 6379;
 829     config.hostsocket = NULL;
 830     config.repeat = 1;
 831     config.interval = 0;
 832     config.dbnum = 0;
 833     config.interactive = 0;
 834     config.shutdown = 0;
 835     config.monitor_mode = 0;
 836     config.pubsub_mode = 0;
 837     config.latency_mode = 0;
 838     config.cluster_mode = 0;
 839     config.stdinarg = 0;
 840     config.auth = NULL;
 841     config.raw_output = !isatty(fileno(stdout)) && (getenv("FAKETTY") == NULL);
 842     config.mb_delim = sdsnew("\n");
 843     cliInitHelp();
 844
 845     firstarg = parseOptions(argc,argv);
 846     argc -= firstarg;
 847     argv += firstarg;
 848
 849     /* Start in latency mode if appropriate */
 850     if (config.latency_mode) {
 851         cliConnect(0);
 852         latencyMode();
 853     }
 854
 855     /* Start interactive mode when no command is provided */
 856     if (argc == 0) {
 857         /* Note that in repl mode we don't abort on connection error.
 858          * A new attempt will be performed for every command send. */
 859         cliConnect(0);
 860         repl();
 861     }
 862
 863     /* Otherwise, we have some arguments to execute */
 864     if (cliConnect(0) != REDIS_OK) exit(1);
 865     return noninteractive(argc,convertToSds(argc,argv));
 866 }