src/redis-cli.c

   1 /* Redis CLI (command line interface)
   2  *
   3  * Copyright (c) 2009-2012, 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 <time.h>
  39 #include <ctype.h>
  40 #include <errno.h>
  41 #include <sys/stat.h>
  42 #include <sys/time.h>
  43 #include <assert.h>
  44
  45 #include "hiredis.h"
  46 #include "sds.h"
  47 #include "zmalloc.h"
  48 #include "linenoise.h"
  49 #include "help.h"
  50 #include "anet.h"
  51 #include "ae.h"
  52
  53 #define REDIS_NOTUSED(V) ((void) V)
  54
  55 #define OUTPUT_STANDARD 0
  56 #define OUTPUT_RAW 1
  57 #define OUTPUT_CSV 2
  58
  59 static redisContext *context;
  60 static struct config {
  61     char *hostip;
  62     int hostport;
  63     char *hostsocket;
  64     long repeat;
  65     long interval;
  66     int dbnum;
  67     int interactive;
  68     int shutdown;
  69     int monitor_mode;
  70     int pubsub_mode;
  71     int latency_mode;
  72     int cluster_mode;
  73     int cluster_reissue_command;
  74     int slave_mode;
  75     int pipe_mode;
  76     int bigkeys;
  77     int stdinarg; /* get last arg from stdin. (-x option) */
  78     char *auth;
  79     int output; /* output mode, see OUTPUT_* defines */
  80     sds mb_delim;
  81     char prompt[128];
  82     char *eval;
  83 } config;
  84
  85 static void usage();
  86 char *redisGitSHA1(void);
  87 char *redisGitDirty(void);
  88
  89 /*------------------------------------------------------------------------------
  90  * Utility functions
  91  *--------------------------------------------------------------------------- */
  92
  93 static long long mstime(void) {
  94     struct timeval tv;
  95     long long mst;
  96
  97     gettimeofday(&tv, NULL);
  98     mst = ((long long)tv.tv_sec)*1000;
  99     mst += tv.tv_usec/1000;
 100     return mst;
 101 }
 102
 103 static void cliRefreshPrompt(void) {
 104     int len;
 105
 106     if (config.hostsocket != NULL)
 107         len = snprintf(config.prompt,sizeof(config.prompt),"redis %s",
 108                        config.hostsocket);
 109     else
 110         len = snprintf(config.prompt,sizeof(config.prompt),"redis %s:%d",
 111                        config.hostip, config.hostport);
 112     /* Add [dbnum] if needed */
 113     if (config.dbnum != 0)
 114         len += snprintf(config.prompt+len,sizeof(config.prompt)-len,"[%d]",
 115             config.dbnum);
 116     snprintf(config.prompt+len,sizeof(config.prompt)-len,"> ");
 117 }
 118
 119 /*------------------------------------------------------------------------------
 120  * Help functions
 121  *--------------------------------------------------------------------------- */
 122
 123 #define CLI_HELP_COMMAND 1
 124 #define CLI_HELP_GROUP 2
 125
 126 typedef struct {
 127     int type;
 128     int argc;
 129     sds *argv;
 130     sds full;
 131
 132     /* Only used for help on commands */
 133     struct commandHelp *org;
 134 } helpEntry;
 135
 136 static helpEntry *helpEntries;
 137 static int helpEntriesLen;
 138
 139 static sds cliVersion() {
 140     sds version;
 141     version = sdscatprintf(sdsempty(), "%s", REDIS_VERSION);
 142
 143     /* Add git commit and working tree status when available */
 144     if (strtoll(redisGitSHA1(),NULL,16)) {
 145         version = sdscatprintf(version, " (git:%s", redisGitSHA1());
 146         if (strtoll(redisGitDirty(),NULL,10))
 147             version = sdscatprintf(version, "-dirty");
 148         version = sdscat(version, ")");
 149     }
 150     return version;
 151 }
 152
 153 static void cliInitHelp() {
 154     int commandslen = sizeof(commandHelp)/sizeof(struct commandHelp);
 155     int groupslen = sizeof(commandGroups)/sizeof(char*);
 156     int i, len, pos = 0;
 157     helpEntry tmp;
 158
 159     helpEntriesLen = len = commandslen+groupslen;
 160     helpEntries = malloc(sizeof(helpEntry)*len);
 161
 162     for (i = 0; i < groupslen; i++) {
 163         tmp.argc = 1;
 164         tmp.argv = malloc(sizeof(sds));
 165         tmp.argv[0] = sdscatprintf(sdsempty(),"@%s",commandGroups[i]);
 166         tmp.full = tmp.argv[0];
 167         tmp.type = CLI_HELP_GROUP;
 168         tmp.org = NULL;
 169         helpEntries[pos++] = tmp;
 170     }
 171
 172     for (i = 0; i < commandslen; i++) {
 173         tmp.argv = sdssplitargs(commandHelp[i].name,&tmp.argc);
 174         tmp.full = sdsnew(commandHelp[i].name);
 175         tmp.type = CLI_HELP_COMMAND;
 176         tmp.org = &commandHelp[i];
 177         helpEntries[pos++] = tmp;
 178     }
 179 }
 180
 181 /* Output command help to stdout. */
 182 static void cliOutputCommandHelp(struct commandHelp *help, int group) {
 183     printf("\r\n  \x1b[1m%s\x1b[0m \x1b[90m%s\x1b[0m\r\n", help->name, help->params);
 184     printf("  \x1b[33msummary:\x1b[0m %s\r\n", help->summary);
 185     printf("  \x1b[33msince:\x1b[0m %s\r\n", help->since);
 186     if (group) {
 187         printf("  \x1b[33mgroup:\x1b[0m %s\r\n", commandGroups[help->group]);
 188     }
 189 }
 190
 191 /* Print generic help. */
 192 static void cliOutputGenericHelp() {
 193     sds version = cliVersion();
 194     printf(
 195         "redis-cli %s\r\n"
 196         "Type: \"help @<group>\" to get a list of commands in <group>\r\n"
 197         "      \"help <command>\" for help on <command>\r\n"
 198         "      \"help <tab>\" to get a list of possible help topics\r\n"
 199         "      \"quit\" to exit\r\n",
 200         version
 201     );
 202     sdsfree(version);
 203 }
 204
 205 /* Output all command help, filtering by group or command name. */
 206 static void cliOutputHelp(int argc, char **argv) {
 207     int i, j, len;
 208     int group = -1;
 209     helpEntry *entry;
 210     struct commandHelp *help;
 211
 212     if (argc == 0) {
 213         cliOutputGenericHelp();
 214         return;
 215     } else if (argc > 0 && argv[0][0] == '@') {
 216         len = sizeof(commandGroups)/sizeof(char*);
 217         for (i = 0; i < len; i++) {
 218             if (strcasecmp(argv[0]+1,commandGroups[i]) == 0) {
 219                 group = i;
 220                 break;
 221             }
 222         }
 223     }
 224
 225     assert(argc > 0);
 226     for (i = 0; i < helpEntriesLen; i++) {
 227         entry = &helpEntries[i];
 228         if (entry->type != CLI_HELP_COMMAND) continue;
 229
 230         help = entry->org;
 231         if (group == -1) {
 232             /* Compare all arguments */
 233             if (argc == entry->argc) {
 234                 for (j = 0; j < argc; j++) {
 235                     if (strcasecmp(argv[j],entry->argv[j]) != 0) break;
 236                 }
 237                 if (j == argc) {
 238                     cliOutputCommandHelp(help,1);
 239                 }
 240             }
 241         } else {
 242             if (group == help->group) {
 243                 cliOutputCommandHelp(help,0);
 244             }
 245         }
 246     }
 247     printf("\r\n");
 248 }
 249
 250 static void completionCallback(const char *buf, linenoiseCompletions *lc) {
 251     size_t startpos = 0;
 252     int mask;
 253     int i;
 254     size_t matchlen;
 255     sds tmp;
 256
 257     if (strncasecmp(buf,"help ",5) == 0) {
 258         startpos = 5;
 259         while (isspace(buf[startpos])) startpos++;
 260         mask = CLI_HELP_COMMAND | CLI_HELP_GROUP;
 261     } else {
 262         mask = CLI_HELP_COMMAND;
 263     }
 264
 265     for (i = 0; i < helpEntriesLen; i++) {
 266         if (!(helpEntries[i].type & mask)) continue;
 267
 268         matchlen = strlen(buf+startpos);
 269         if (strncasecmp(buf+startpos,helpEntries[i].full,matchlen) == 0) {
 270             tmp = sdsnewlen(buf,startpos);
 271             tmp = sdscat(tmp,helpEntries[i].full);
 272             linenoiseAddCompletion(lc,tmp);
 273             sdsfree(tmp);
 274         }
 275     }
 276 }
 277
 278 /*------------------------------------------------------------------------------
 279  * Networking / parsing
 280  *--------------------------------------------------------------------------- */
 281
 282 /* Send AUTH command to the server */
 283 static int cliAuth() {
 284     redisReply *reply;
 285     if (config.auth == NULL) return REDIS_OK;
 286
 287     reply = redisCommand(context,"AUTH %s",config.auth);
 288     if (reply != NULL) {
 289         freeReplyObject(reply);
 290         return REDIS_OK;
 291     }
 292     return REDIS_ERR;
 293 }
 294
 295 /* Send SELECT dbnum to the server */
 296 static int cliSelect() {
 297     redisReply *reply;
 298     if (config.dbnum == 0) return REDIS_OK;
 299
 300     reply = redisCommand(context,"SELECT %d",config.dbnum);
 301     if (reply != NULL) {
 302         freeReplyObject(reply);
 303         return REDIS_OK;
 304     }
 305     return REDIS_ERR;
 306 }
 307
 308 /* Connect to the client. If force is not zero the connection is performed
 309  * even if there is already a connected socket. */
 310 static int cliConnect(int force) {
 311     if (context == NULL || force) {
 312         if (context != NULL)
 313             redisFree(context);
 314
 315         if (config.hostsocket == NULL) {
 316             context = redisConnect(config.hostip,config.hostport);
 317         } else {
 318             context = redisConnectUnix(config.hostsocket);
 319         }
 320
 321         if (context->err) {
 322             fprintf(stderr,"Could not connect to Redis at ");
 323             if (config.hostsocket == NULL)
 324                 fprintf(stderr,"%s:%d: %s\n",config.hostip,config.hostport,context->errstr);
 325             else
 326                 fprintf(stderr,"%s: %s\n",config.hostsocket,context->errstr);
 327             redisFree(context);
 328             context = NULL;
 329             return REDIS_ERR;
 330         }
 331
 332         /* Do AUTH and select the right DB. */
 333         if (cliAuth() != REDIS_OK)
 334             return REDIS_ERR;
 335         if (cliSelect() != REDIS_OK)
 336             return REDIS_ERR;
 337     }
 338     return REDIS_OK;
 339 }
 340
 341 static void cliPrintContextError() {
 342     if (context == NULL) return;
 343     fprintf(stderr,"Error: %s\n",context->errstr);
 344 }
 345
 346 static sds cliFormatReplyTTY(redisReply *r, char *prefix) {
 347     sds out = sdsempty();
 348     switch (r->type) {
 349     case REDIS_REPLY_ERROR:
 350         out = sdscatprintf(out,"(error) %s\n", r->str);
 351     break;
 352     case REDIS_REPLY_STATUS:
 353         out = sdscat(out,r->str);
 354         out = sdscat(out,"\n");
 355     break;
 356     case REDIS_REPLY_INTEGER:
 357         out = sdscatprintf(out,"(integer) %lld\n",r->integer);
 358     break;
 359     case REDIS_REPLY_STRING:
 360         /* If you are producing output for the standard output we want
 361         * a more interesting output with quoted characters and so forth */
 362         out = sdscatrepr(out,r->str,r->len);
 363         out = sdscat(out,"\n");
 364     break;
 365     case REDIS_REPLY_NIL:
 366         out = sdscat(out,"(nil)\n");
 367     break;
 368     case REDIS_REPLY_ARRAY:
 369         if (r->elements == 0) {
 370             out = sdscat(out,"(empty list or set)\n");
 371         } else {
 372             unsigned int i, idxlen = 0;
 373             char _prefixlen[16];
 374             char _prefixfmt[16];
 375             sds _prefix;
 376             sds tmp;
 377
 378             /* Calculate chars needed to represent the largest index */
 379             i = r->elements;
 380             do {
 381                 idxlen++;
 382                 i /= 10;
 383             } while(i);
 384
 385             /* Prefix for nested multi bulks should grow with idxlen+2 spaces */
 386             memset(_prefixlen,' ',idxlen+2);
 387             _prefixlen[idxlen+2] = '\0';
 388             _prefix = sdscat(sdsnew(prefix),_prefixlen);
 389
 390             /* Setup prefix format for every entry */
 391             snprintf(_prefixfmt,sizeof(_prefixfmt),"%%s%%%dd) ",idxlen);
 392
 393             for (i = 0; i < r->elements; i++) {
 394                 /* Don't use the prefix for the first element, as the parent
 395                  * caller already prepended the index number. */
 396                 out = sdscatprintf(out,_prefixfmt,i == 0 ? "" : prefix,i+1);
 397
 398                 /* Format the multi bulk entry */
 399                 tmp = cliFormatReplyTTY(r->element[i],_prefix);
 400                 out = sdscatlen(out,tmp,sdslen(tmp));
 401                 sdsfree(tmp);
 402             }
 403             sdsfree(_prefix);
 404         }
 405     break;
 406     default:
 407         fprintf(stderr,"Unknown reply type: %d\n", r->type);
 408         exit(1);
 409     }
 410     return out;
 411 }
 412
 413 static sds cliFormatReplyRaw(redisReply *r) {
 414     sds out = sdsempty(), tmp;
 415     size_t i;
 416
 417     switch (r->type) {
 418     case REDIS_REPLY_NIL:
 419         /* Nothing... */
 420         break;
 421     case REDIS_REPLY_ERROR:
 422         out = sdscatlen(out,r->str,r->len);
 423         out = sdscatlen(out,"\n",1);
 424         break;
 425     case REDIS_REPLY_STATUS:
 426     case REDIS_REPLY_STRING:
 427         out = sdscatlen(out,r->str,r->len);
 428         break;
 429     case REDIS_REPLY_INTEGER:
 430         out = sdscatprintf(out,"%lld",r->integer);
 431         break;
 432     case REDIS_REPLY_ARRAY:
 433         for (i = 0; i < r->elements; i++) {
 434             if (i > 0) out = sdscat(out,config.mb_delim);
 435             tmp = cliFormatReplyRaw(r->element[i]);
 436             out = sdscatlen(out,tmp,sdslen(tmp));
 437             sdsfree(tmp);
 438         }
 439         break;
 440     default:
 441         fprintf(stderr,"Unknown reply type: %d\n", r->type);
 442         exit(1);
 443     }
 444     return out;
 445 }
 446
 447 static sds cliFormatReplyCSV(redisReply *r) {
 448     unsigned int i;
 449
 450     sds out = sdsempty();
 451     switch (r->type) {
 452     case REDIS_REPLY_ERROR:
 453         out = sdscat(out,"ERROR,");
 454         out = sdscatrepr(out,r->str,strlen(r->str));
 455     break;
 456     case REDIS_REPLY_STATUS:
 457         out = sdscatrepr(out,r->str,r->len);
 458     break;
 459     case REDIS_REPLY_INTEGER:
 460         out = sdscatprintf(out,"%lld",r->integer);
 461     break;
 462     case REDIS_REPLY_STRING:
 463         out = sdscatrepr(out,r->str,r->len);
 464     break;
 465     case REDIS_REPLY_NIL:
 466         out = sdscat(out,"NIL\n");
 467     break;
 468     case REDIS_REPLY_ARRAY:
 469         for (i = 0; i < r->elements; i++) {
 470             sds tmp = cliFormatReplyCSV(r->element[i]);
 471             out = sdscatlen(out,tmp,sdslen(tmp));
 472             if (i != r->elements-1) out = sdscat(out,",");
 473             sdsfree(tmp);
 474         }
 475     break;
 476     default:
 477         fprintf(stderr,"Unknown reply type: %d\n", r->type);
 478         exit(1);
 479     }
 480     return out;
 481 }
 482
 483 static int cliReadReply(int output_raw_strings) {
 484     void *_reply;
 485     redisReply *reply;
 486     sds out = NULL;
 487     int output = 1;
 488
 489     if (redisGetReply(context,&_reply) != REDIS_OK) {
 490         if (config.shutdown)
 491             return REDIS_OK;
 492         if (config.interactive) {
 493             /* Filter cases where we should reconnect */
 494             if (context->err == REDIS_ERR_IO && errno == ECONNRESET)
 495                 return REDIS_ERR;
 496             if (context->err == REDIS_ERR_EOF)
 497                 return REDIS_ERR;
 498         }
 499         cliPrintContextError();
 500         exit(1);
 501         return REDIS_ERR; /* avoid compiler warning */
 502     }
 503
 504     reply = (redisReply*)_reply;
 505
 506     /* Check if we need to connect to a different node and reissue the
 507      * request. */
 508     if (config.cluster_mode && reply->type == REDIS_REPLY_ERROR &&
 509         (!strncmp(reply->str,"MOVED",5) || !strcmp(reply->str,"ASK")))
 510     {
 511         char *p = reply->str, *s;
 512         int slot;
 513
 514         output = 0;
 515         /* Comments show the position of the pointer as:
 516          *
 517          * [S] for pointer 's'
 518          * [P] for pointer 'p'
 519          */
 520         s = strchr(p,' ');      /* MOVED[S]3999 127.0.0.1:6381 */
 521         p = strchr(s+1,' ');    /* MOVED[S]3999[P]127.0.0.1:6381 */
 522         *p = '\0';
 523         slot = atoi(s+1);
 524         s = strchr(p+1,':');    /* MOVED 3999[P]127.0.0.1[S]6381 */
 525         *s = '\0';
 526         sdsfree(config.hostip);
 527         config.hostip = sdsnew(p+1);
 528         config.hostport = atoi(s+1);
 529         if (config.interactive)
 530             printf("-> Redirected to slot [%d] located at %s:%d\n",
 531                 slot, config.hostip, config.hostport);
 532         config.cluster_reissue_command = 1;
 533     }
 534
 535     if (output) {
 536         if (output_raw_strings) {
 537             out = cliFormatReplyRaw(reply);
 538         } else {
 539             if (config.output == OUTPUT_RAW) {
 540                 out = cliFormatReplyRaw(reply);
 541                 out = sdscat(out,"\n");
 542             } else if (config.output == OUTPUT_STANDARD) {
 543                 out = cliFormatReplyTTY(reply,"");
 544             } else if (config.output == OUTPUT_CSV) {
 545                 out = cliFormatReplyCSV(reply);
 546                 out = sdscat(out,"\n");
 547             }
 548         }
 549         fwrite(out,sdslen(out),1,stdout);
 550         sdsfree(out);
 551     }
 552     freeReplyObject(reply);
 553     return REDIS_OK;
 554 }
 555
 556 static int cliSendCommand(int argc, char **argv, int repeat) {
 557     char *command = argv[0];
 558     size_t *argvlen;
 559     int j, output_raw;
 560
 561     if (!strcasecmp(command,"help") || !strcasecmp(command,"?")) {
 562         cliOutputHelp(--argc, ++argv);
 563         return REDIS_OK;
 564     }
 565
 566     if (context == NULL) return REDIS_ERR;
 567
 568     output_raw = 0;
 569     if (!strcasecmp(command,"info") ||
 570         (argc == 2 && !strcasecmp(command,"cluster") &&
 571                       (!strcasecmp(argv[1],"nodes") ||
 572                        !strcasecmp(argv[1],"info"))) ||
 573         (argc == 2 && !strcasecmp(command,"client") &&
 574                        !strcasecmp(argv[1],"list")))
 575
 576     {
 577         output_raw = 1;
 578     }
 579
 580     if (!strcasecmp(command,"shutdown")) config.shutdown = 1;
 581     if (!strcasecmp(command,"monitor")) config.monitor_mode = 1;
 582     if (!strcasecmp(command,"subscribe") ||
 583         !strcasecmp(command,"psubscribe")) config.pubsub_mode = 1;
 584
 585     /* Setup argument length */
 586     argvlen = malloc(argc*sizeof(size_t));
 587     for (j = 0; j < argc; j++)
 588         argvlen[j] = sdslen(argv[j]);
 589
 590     while(repeat--) {
 591         redisAppendCommandArgv(context,argc,(const char**)argv,argvlen);
 592         while (config.monitor_mode) {
 593             if (cliReadReply(output_raw) != REDIS_OK) exit(1);
 594             fflush(stdout);
 595         }
 596
 597         if (config.pubsub_mode) {
 598             if (config.output != OUTPUT_RAW)
 599                 printf("Reading messages... (press Ctrl-C to quit)\n");
 600             while (1) {
 601                 if (cliReadReply(output_raw) != REDIS_OK) exit(1);
 602             }
 603         }
 604
 605         if (cliReadReply(output_raw) != REDIS_OK) {
 606             free(argvlen);
 607             return REDIS_ERR;
 608         } else {
 609             /* Store database number when SELECT was successfully executed. */
 610             if (!strcasecmp(command,"select") && argc == 2) {
 611                 config.dbnum = atoi(argv[1]);
 612                 cliRefreshPrompt();
 613             }
 614         }
 615         if (config.interval) usleep(config.interval);
 616         fflush(stdout); /* Make it grep friendly */
 617     }
 618
 619     free(argvlen);
 620     return REDIS_OK;
 621 }
 622
 623 /*------------------------------------------------------------------------------
 624  * User interface
 625  *--------------------------------------------------------------------------- */
 626
 627 static int parseOptions(int argc, char **argv) {
 628     int i;
 629
 630     for (i = 1; i < argc; i++) {
 631         int lastarg = i==argc-1;
 632
 633         if (!strcmp(argv[i],"-h") && !lastarg) {
 634             sdsfree(config.hostip);
 635             config.hostip = sdsnew(argv[++i]);
 636         } else if (!strcmp(argv[i],"-h") && lastarg) {
 637             usage();
 638         } else if (!strcmp(argv[i],"--help")) {
 639             usage();
 640         } else if (!strcmp(argv[i],"-x")) {
 641             config.stdinarg = 1;
 642         } else if (!strcmp(argv[i],"-p") && !lastarg) {
 643             config.hostport = atoi(argv[++i]);
 644         } else if (!strcmp(argv[i],"-s") && !lastarg) {
 645             config.hostsocket = argv[++i];
 646         } else if (!strcmp(argv[i],"-r") && !lastarg) {
 647             config.repeat = strtoll(argv[++i],NULL,10);
 648         } else if (!strcmp(argv[i],"-i") && !lastarg) {
 649             double seconds = atof(argv[++i]);
 650             config.interval = seconds*1000000;
 651         } else if (!strcmp(argv[i],"-n") && !lastarg) {
 652             config.dbnum = atoi(argv[++i]);
 653         } else if (!strcmp(argv[i],"-a") && !lastarg) {
 654             config.auth = argv[++i];
 655         } else if (!strcmp(argv[i],"--raw")) {
 656             config.output = OUTPUT_RAW;
 657         } else if (!strcmp(argv[i],"--csv")) {
 658             config.output = OUTPUT_CSV;
 659         } else if (!strcmp(argv[i],"--latency")) {
 660             config.latency_mode = 1;
 661         } else if (!strcmp(argv[i],"--slave")) {
 662             config.slave_mode = 1;
 663         } else if (!strcmp(argv[i],"--pipe")) {
 664             config.pipe_mode = 1;
 665         } else if (!strcmp(argv[i],"--bigkeys")) {
 666             config.bigkeys = 1;
 667         } else if (!strcmp(argv[i],"--eval") && !lastarg) {
 668             config.eval = argv[++i];
 669         } else if (!strcmp(argv[i],"-c")) {
 670             config.cluster_mode = 1;
 671         } else if (!strcmp(argv[i],"-d") && !lastarg) {
 672             sdsfree(config.mb_delim);
 673             config.mb_delim = sdsnew(argv[++i]);
 674         } else if (!strcmp(argv[i],"-v") || !strcmp(argv[i], "--version")) {
 675             sds version = cliVersion();
 676             printf("redis-cli %s\n", version);
 677             sdsfree(version);
 678             exit(0);
 679         } else {
 680             break;
 681         }
 682     }
 683     return i;
 684 }
 685
 686 static sds readArgFromStdin(void) {
 687     char buf[1024];
 688     sds arg = sdsempty();
 689
 690     while(1) {
 691         int nread = read(fileno(stdin),buf,1024);
 692
 693         if (nread == 0) break;
 694         else if (nread == -1) {
 695             perror("Reading from standard input");
 696             exit(1);
 697         }
 698         arg = sdscatlen(arg,buf,nread);
 699     }
 700     return arg;
 701 }
 702
 703 static void usage() {
 704     sds version = cliVersion();
 705     fprintf(stderr,
 706 "redis-cli %s\n"
 707 "\n"
 708 "Usage: redis-cli [OPTIONS] [cmd [arg [arg ...]]]\n"
 709 "  -h <hostname>    Server hostname (default: 127.0.0.1)\n"
 710 "  -p <port>        Server port (default: 6379)\n"
 711 "  -s <socket>      Server socket (overrides hostname and port)\n"
 712 "  -a <password>    Password to use when connecting to the server\n"
 713 "  -r <repeat>      Execute specified command N times\n"
 714 "  -i <interval>    When -r is used, waits <interval> seconds per command.\n"
 715 "                   It is possible to specify sub-second times like -i 0.1\n"
 716 "  -n <db>          Database number\n"
 717 "  -x               Read last argument from STDIN\n"
 718 "  -d <delimiter>   Multi-bulk delimiter in for raw formatting (default: \\n)\n"
 719 "  -c               Enable cluster mode (follow -ASK and -MOVED redirections)\n"
 720 "  --raw            Use raw formatting for replies (default when STDOUT is not a tty)\n"
 721 "  --latency        Enter a special mode continuously sampling latency\n"
 722 "  --slave          Simulate a slave showing commands received from the master\n"
 723 "  --pipe           Transfer raw Redis protocol from stdin to server\n"
 724 "  --bigkeys        Sample Redis keys looking for big keys\n"
 725 "  --eval <file>    Send an EVAL command using the Lua script at <file>\n"
 726 "  --help           Output this help and exit\n"
 727 "  --version        Output version and exit\n"
 728 "\n"
 729 "Examples:\n"
 730 "  cat /etc/passwd | redis-cli -x set mypasswd\n"
 731 "  redis-cli get mypasswd\n"
 732 "  redis-cli -r 100 lpush mylist x\n"
 733 "  redis-cli -r 100 -i 1 info | grep used_memory_human:\n"
 734 "  redis-cli --eval myscript.lua key1 key2 , arg1 arg2 arg3\n"
 735 "  (Note: when using --eval the comma separates KEYS[] from ARGV[] items)\n"
 736 "\n"
 737 "When no command is given, redis-cli starts in interactive mode.\n"
 738 "Type \"help\" in interactive mode for information on available commands.\n"
 739 "\n",
 740         version);
 741     sdsfree(version);
 742     exit(1);
 743 }
 744
 745 /* Turn the plain C strings into Sds strings */
 746 static char **convertToSds(int count, char** args) {
 747   int j;
 748   char **sds = zmalloc(sizeof(char*)*count);
 749
 750   for(j = 0; j < count; j++)
 751     sds[j] = sdsnew(args[j]);
 752
 753   return sds;
 754 }
 755
 756 #define LINE_BUFLEN 4096
 757 static void repl() {
 758     sds historyfile = NULL;
 759     int history = 0;
 760     char *line;
 761     int argc;
 762     sds *argv;
 763
 764     config.interactive = 1;
 765     linenoiseSetCompletionCallback(completionCallback);
 766
 767     /* Only use history when stdin is a tty. */
 768     if (isatty(fileno(stdin))) {
 769         history = 1;
 770
 771         if (getenv("HOME") != NULL) {
 772             historyfile = sdscatprintf(sdsempty(),"%s/.rediscli_history",getenv("HOME"));
 773             linenoiseHistoryLoad(historyfile);
 774         }
 775     }
 776
 777     cliRefreshPrompt();
 778     while((line = linenoise(context ? config.prompt : "not connected> ")) != NULL) {
 779         if (line[0] != '\0') {
 780             argv = sdssplitargs(line,&argc);
 781             if (history) linenoiseHistoryAdd(line);
 782             if (historyfile) linenoiseHistorySave(historyfile);
 783
 784             if (argv == NULL) {
 785                 printf("Invalid argument(s)\n");
 786                 free(line);
 787                 continue;
 788             } else if (argc > 0) {
 789                 if (strcasecmp(argv[0],"quit") == 0 ||
 790                     strcasecmp(argv[0],"exit") == 0)
 791                 {
 792                     exit(0);
 793                 } else if (argc == 3 && !strcasecmp(argv[0],"connect")) {
 794                     sdsfree(config.hostip);
 795                     config.hostip = sdsnew(argv[1]);
 796                     config.hostport = atoi(argv[2]);
 797                     cliConnect(1);
 798                 } else if (argc == 1 && !strcasecmp(argv[0],"clear")) {
 799                     linenoiseClearScreen();
 800                 } else {
 801                     long long start_time = mstime(), elapsed;
 802                     int repeat, skipargs = 0;
 803
 804                     repeat = atoi(argv[0]);
 805                     if (argc > 1 && repeat) {
 806                         skipargs = 1;
 807                     } else {
 808                         repeat = 1;
 809                     }
 810
 811                     while (1) {
 812                         config.cluster_reissue_command = 0;
 813                         if (cliSendCommand(argc-skipargs,argv+skipargs,repeat)
 814                             != REDIS_OK)
 815                         {
 816                             cliConnect(1);
 817
 818                             /* If we still cannot send the command print error.
 819                              * We'll try to reconnect the next time. */
 820                             if (cliSendCommand(argc-skipargs,argv+skipargs,repeat)
 821                                 != REDIS_OK)
 822                                 cliPrintContextError();
 823                         }
 824                         /* Issue the command again if we got redirected in cluster mode */
 825                         if (config.cluster_mode && config.cluster_reissue_command) {
 826                             cliConnect(1);
 827                         } else {
 828                             break;
 829                         }
 830                     }
 831                     elapsed = mstime()-start_time;
 832                     if (elapsed >= 500) {
 833                         printf("(%.2fs)\n",(double)elapsed/1000);
 834                     }
 835                 }
 836             }
 837             /* Free the argument vector */
 838             while(argc--) sdsfree(argv[argc]);
 839             zfree(argv);
 840         }
 841         /* linenoise() returns malloc-ed lines like readline() */
 842         free(line);
 843     }
 844     exit(0);
 845 }
 846
 847 static int noninteractive(int argc, char **argv) {
 848     int retval = 0;
 849     if (config.stdinarg) {
 850         argv = zrealloc(argv, (argc+1)*sizeof(char*));
 851         argv[argc] = readArgFromStdin();
 852         retval = cliSendCommand(argc+1, argv, config.repeat);
 853     } else {
 854         /* stdin is probably a tty, can be tested with S_ISCHR(s.st_mode) */
 855         retval = cliSendCommand(argc, argv, config.repeat);
 856     }
 857     return retval;
 858 }
 859
 860 static int evalMode(int argc, char **argv) {
 861     sds script = sdsempty();
 862     FILE *fp;
 863     char buf[1024];
 864     size_t nread;
 865     char **argv2;
 866     int j, got_comma = 0, keys = 0;
 867
 868     /* Load the script from the file, as an sds string. */
 869     fp = fopen(config.eval,"r");
 870     if (!fp) {
 871         fprintf(stderr,
 872             "Can't open file '%s': %s\n", config.eval, strerror(errno));
 873         exit(1);
 874     }
 875     while((nread = fread(buf,1,sizeof(buf),fp)) != 0) {
 876         script = sdscatlen(script,buf,nread);
 877     }
 878     fclose(fp);
 879
 880     /* Create our argument vector */
 881     argv2 = zmalloc(sizeof(sds)*(argc+3));
 882     argv2[0] = sdsnew("EVAL");
 883     argv2[1] = script;
 884     for (j = 0; j < argc; j++) {
 885         if (!got_comma && argv[j][0] == ',' && argv[j][1] == 0) {
 886             got_comma = 1;
 887             continue;
 888         }
 889         argv2[j+3-got_comma] = sdsnew(argv[j]);
 890         if (!got_comma) keys++;
 891     }
 892     argv2[2] = sdscatprintf(sdsempty(),"%d",keys);
 893
 894     /* Call it */
 895     return cliSendCommand(argc+3-got_comma, argv2, config.repeat);
 896 }
 897
 898 static void latencyMode(void) {
 899     redisReply *reply;
 900     long long start, latency, min = 0, max = 0, tot = 0, count = 0;
 901     double avg;
 902
 903     if (!context) exit(1);
 904     while(1) {
 905         start = mstime();
 906         reply = redisCommand(context,"PING");
 907         if (reply == NULL) {
 908             fprintf(stderr,"\nI/O error\n");
 909             exit(1);
 910         }
 911         latency = mstime()-start;
 912         freeReplyObject(reply);
 913         count++;
 914         if (count == 1) {
 915             min = max = tot = latency;
 916             avg = (double) latency;
 917         } else {
 918             if (latency < min) min = latency;
 919             if (latency > max) max = latency;
 920             tot += latency;
 921             avg = (double) tot/count;
 922         }
 923         printf("\x1b[0G\x1b[2Kmin: %lld, max: %lld, avg: %.2f (%lld samples)",
 924             min, max, avg, count);
 925         fflush(stdout);
 926         usleep(10000);
 927     }
 928 }
 929
 930 static void slaveMode(void) {
 931     /* To start we need to send the SYNC command and return the payload.
 932      * The hiredis client lib does not understand this part of the protocol
 933      * and we don't want to mess with its buffers, so everything is performed
 934      * using direct low-level I/O. */
 935     int fd = context->fd;
 936     char buf[1024], *p;
 937     ssize_t nread;
 938     unsigned long long payload;
 939
 940     /* Send the SYNC command. */
 941     if (write(fd,"SYNC\r\n",6) != 6) {
 942         fprintf(stderr,"Error writing to master\n");
 943         exit(1);
 944     }
 945
 946     /* Read $<payload>\r\n, making sure to read just up to "\n" */
 947     p = buf;
 948     while(1) {
 949         nread = read(fd,p,1);
 950         if (nread <= 0) {
 951             fprintf(stderr,"Error reading bulk length while SYNCing\n");
 952             exit(1);
 953         }
 954         if (*p == '\n') break;
 955         p++;
 956     }
 957     *p = '\0';
 958     payload = strtoull(buf+1,NULL,10);
 959     fprintf(stderr,"SYNC with master, discarding %lld bytes of bulk tranfer...\n",
 960             payload);
 961
 962     /* Discard the payload. */
 963     while(payload) {
 964         nread = read(fd,buf,(payload > sizeof(buf)) ? sizeof(buf) : payload);
 965         if (nread <= 0) {
 966             fprintf(stderr,"Error reading RDB payload while SYNCing\n");
 967             exit(1);
 968         }
 969         payload -= nread;
 970     }
 971     fprintf(stderr,"SYNC done. Logging commands from master.\n");
 972
 973     /* Now we can use the hiredis to read the incoming protocol. */
 974     config.output = OUTPUT_CSV;
 975     while (cliReadReply(0) == REDIS_OK);
 976 }
 977
 978 static void pipeMode(void) {
 979     int fd = context->fd;
 980     long long errors = 0, replies = 0, obuf_len = 0, obuf_pos = 0;
 981     char ibuf[1024*16], obuf[1024*16]; /* Input and output buffers */
 982     char aneterr[ANET_ERR_LEN];
 983     redisReader *reader = redisReaderCreate();
 984     redisReply *reply;
 985     int eof = 0; /* True once we consumed all the standard input. */
 986     int done = 0;
 987     char magic[20]; /* Special reply we recognize. */
 988
 989     srand(time(NULL));
 990
 991     /* Use non blocking I/O. */
 992     if (anetNonBlock(aneterr,fd) == ANET_ERR) {
 993         fprintf(stderr, "Can't set the socket in non blocking mode: %s\n",
 994             aneterr);
 995         exit(1);
 996     }
 997
 998     /* Transfer raw protocol and read replies from the server at the same
 999      * time. */
1000     while(!done) {
1001         int mask = AE_READABLE;
1002
1003         if (!eof || obuf_len != 0) mask |= AE_WRITABLE;
1004         mask = aeWait(fd,mask,1000);
1005
1006         /* Handle the readable state: we can read replies from the server. */
1007         if (mask & AE_READABLE) {
1008             ssize_t nread;
1009
1010             /* Read from socket and feed the hiredis reader. */
1011             do {
1012                 nread = read(fd,ibuf,sizeof(ibuf));
1013                 if (nread == -1 && errno != EAGAIN && errno != EINTR) {
1014                     fprintf(stderr, "Error reading from the server: %s\n",
1015                         strerror(errno));
1016                     exit(1);
1017                 }
1018                 if (nread > 0) redisReaderFeed(reader,ibuf,nread);
1019             } while(nread > 0);
1020
1021             /* Consume replies. */
1022             do {
1023                 if (redisReaderGetReply(reader,(void**)&reply) == REDIS_ERR) {
1024                     fprintf(stderr, "Error reading replies from server\n");
1025                     exit(1);
1026                 }
1027                 if (reply) {
1028                     if (reply->type == REDIS_REPLY_ERROR) {
1029                         fprintf(stderr,"%s\n", reply->str);
1030                         errors++;
1031                     } else if (eof && reply->type == REDIS_REPLY_STRING &&
1032                                       reply->len == 20) {
1033                         /* Check if this is the reply to our final ECHO
1034                          * command. If so everything was received
1035                          * from the server. */
1036                         if (memcmp(reply->str,magic,20) == 0) {
1037                             printf("Last reply received from server.\n");
1038                             done = 1;
1039                             replies--;
1040                         }
1041                     }
1042                     replies++;
1043                     freeReplyObject(reply);
1044                 }
1045             } while(reply);
1046         }
1047
1048         /* Handle the writable state: we can send protocol to the server. */
1049         if (mask & AE_WRITABLE) {
1050             while(1) {
1051                 /* Transfer current buffer to server. */
1052                 if (obuf_len != 0) {
1053                     ssize_t nwritten = write(fd,obuf+obuf_pos,obuf_len);
1054
1055                     if (nwritten == -1) {
1056                         if (errno != EAGAIN && errno != EINTR) {
1057                             fprintf(stderr, "Error writing to the server: %s\n",
1058                                 strerror(errno));
1059                             exit(1);
1060                         } else {
1061                             nwritten = 0;
1062                         }
1063                     }
1064                     obuf_len -= nwritten;
1065                     obuf_pos += nwritten;
1066                     if (obuf_len != 0) break; /* Can't accept more data. */
1067                 }
1068                 /* If buffer is empty, load from stdin. */
1069                 if (obuf_len == 0 && !eof) {
1070                     ssize_t nread = read(STDIN_FILENO,obuf,sizeof(obuf));
1071
1072                     if (nread == 0) {
1073                         char echo[] =
1074                         "*2\r\n$4\r\nECHO\r\n$20\r\n01234567890123456789\r\n";
1075                         int j;
1076
1077                         eof = 1;
1078                         /* Everything transfered, so we queue a special
1079                          * ECHO command that we can match in the replies
1080                          * to make sure everything was read from the server. */
1081                         for (j = 0; j < 20; j++)
1082                             magic[j] = rand() & 0xff;
1083                         memcpy(echo+19,magic,20);
1084                         memcpy(obuf,echo,sizeof(echo)-1);
1085                         obuf_len = sizeof(echo)-1;
1086                         obuf_pos = 0;
1087                         printf("All data transferred. Waiting for the last reply...\n");
1088                     } else if (nread == -1) {
1089                         fprintf(stderr, "Error reading from stdin: %s\n",
1090                             strerror(errno));
1091                         exit(1);
1092                     } else {
1093                         obuf_len = nread;
1094                         obuf_pos = 0;
1095                     }
1096                 }
1097                 if (obuf_len == 0 && eof) break;
1098             }
1099         }
1100     }
1101     redisReaderFree(reader);
1102     printf("errors: %lld, replies: %lld\n", errors, replies);
1103     if (errors)
1104         exit(1);
1105     else
1106         exit(0);
1107 }
1108
1109 #define TYPE_STRING 0
1110 #define TYPE_LIST   1
1111 #define TYPE_SET    2
1112 #define TYPE_HASH   3
1113 #define TYPE_ZSET   4
1114
1115 static void findBigKeys(void) {
1116     unsigned long long biggest[5] = {0,0,0,0,0};
1117     unsigned long long samples = 0;
1118     redisReply *reply1, *reply2, *reply3 = NULL;
1119     char *sizecmd, *typename[] = {"string","list","set","hash","zset"};
1120     int type;
1121
1122     printf("\n# Press ctrl+c when you have had enough of it... :)\n");
1123     printf("# You can use -i 0.1 to sleep 0.1 sec every 100 sampled keys\n");
1124     printf("# in order to reduce server load (usually not needed).\n\n");
1125     while(1) {
1126         /* Sample with RANDOMKEY */
1127         reply1 = redisCommand(context,"RANDOMKEY");
1128         if (reply1 == NULL) {
1129             fprintf(stderr,"\nI/O error\n");
1130             exit(1);
1131         } else if (reply1->type == REDIS_REPLY_ERROR) {
1132             fprintf(stderr, "RANDOMKEY error: %s\n",
1133                 reply1->str);
1134             exit(1);
1135         }
1136         /* Get the key type */
1137         reply2 = redisCommand(context,"TYPE %s",reply1->str);
1138         assert(reply2 && reply2->type == REDIS_REPLY_STATUS);
1139         samples++;
1140
1141         /* Get the key "size" */
1142         if (!strcmp(reply2->str,"string")) {
1143             sizecmd = "STRLEN";
1144             type = TYPE_STRING;
1145         } else if (!strcmp(reply2->str,"list")) {
1146             sizecmd = "LLEN";
1147             type = TYPE_LIST;
1148         } else if (!strcmp(reply2->str,"set")) {
1149             sizecmd = "SCARD";
1150             type = TYPE_SET;
1151         } else if (!strcmp(reply2->str,"hash")) {
1152             sizecmd = "HLEN";
1153             type = TYPE_HASH;
1154         } else if (!strcmp(reply2->str,"zset")) {
1155             sizecmd = "ZCARD";
1156             type = TYPE_ZSET;
1157         } else if (!strcmp(reply2->str,"none")) {
1158             freeReplyObject(reply1);
1159             freeReplyObject(reply2);
1160             freeReplyObject(reply3);
1161             continue;
1162         } else {
1163             fprintf(stderr, "Unknown key type '%s' for key '%s'\n",
1164                 reply2->str, reply1->str);
1165             exit(1);
1166         }
1167
1168         reply3 = redisCommand(context,"%s %s", sizecmd, reply1->str);
1169         if (reply3 && reply3->type == REDIS_REPLY_INTEGER) {
1170             if (biggest[type] < reply3->integer) {
1171                 printf("[%6s] %s | biggest so far with size %llu\n",
1172                     typename[type], reply1->str,
1173                     (unsigned long long) reply3->integer);
1174                 biggest[type] = reply3->integer;
1175             }
1176         }
1177
1178         if ((samples % 1000000) == 0)
1179             printf("(%llu keys sampled)\n", samples);
1180
1181         if ((samples % 100) == 0 && config.interval)
1182             usleep(config.interval);
1183
1184         freeReplyObject(reply1);
1185         freeReplyObject(reply2);
1186         if (reply3) freeReplyObject(reply3);
1187     }
1188 }
1189
1190 int main(int argc, char **argv) {
1191     int firstarg;
1192
1193     config.hostip = sdsnew("127.0.0.1");
1194     config.hostport = 6379;
1195     config.hostsocket = NULL;
1196     config.repeat = 1;
1197     config.interval = 0;
1198     config.dbnum = 0;
1199     config.interactive = 0;
1200     config.shutdown = 0;
1201     config.monitor_mode = 0;
1202     config.pubsub_mode = 0;
1203     config.latency_mode = 0;
1204     config.cluster_mode = 0;
1205     config.slave_mode = 0;
1206     config.pipe_mode = 0;
1207     config.bigkeys = 0;
1208     config.stdinarg = 0;
1209     config.auth = NULL;
1210     config.eval = NULL;
1211     if (!isatty(fileno(stdout)) && (getenv("FAKETTY") == NULL))
1212         config.output = OUTPUT_RAW;
1213     else
1214         config.output = OUTPUT_STANDARD;
1215     config.mb_delim = sdsnew("\n");
1216     cliInitHelp();
1217
1218     firstarg = parseOptions(argc,argv);
1219     argc -= firstarg;
1220     argv += firstarg;
1221
1222     /* Latency mode */
1223     if (config.latency_mode) {
1224         cliConnect(0);
1225         latencyMode();
1226     }
1227
1228     /* Slave mode */
1229     if (config.slave_mode) {
1230         cliConnect(0);
1231         slaveMode();
1232     }
1233
1234     /* Pipe mode */
1235     if (config.pipe_mode) {
1236         if (cliConnect(0) == REDIS_ERR) exit(1);
1237         pipeMode();
1238     }
1239
1240     /* Find big keys */
1241     if (config.bigkeys) {
1242         cliConnect(0);
1243         findBigKeys();
1244     }
1245
1246     /* Start interactive mode when no command is provided */
1247     if (argc == 0 && !config.eval) {
1248         /* Note that in repl mode we don't abort on connection error.
1249          * A new attempt will be performed for every command send. */
1250         cliConnect(0);
1251         repl();
1252     }
1253
1254     /* Otherwise, we have some arguments to execute */
1255     if (cliConnect(0) != REDIS_OK) exit(1);
1256     if (config.eval) {
1257         return evalMode(argc,argv);
1258     } else {
1259         return noninteractive(argc,convertToSds(argc,argv));
1260     }
1261 }