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