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
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <stdlib.h>
  36 #include <unistd.h>
  37 #include <ctype.h>
  38
  39 #include "anet.h"
  40 #include "sds.h"
  41 #include "adlist.h"
  42 #include "zmalloc.h"
  43 #include "linenoise.h"
  44
  45 #define REDIS_CMD_INLINE 1
  46 #define REDIS_CMD_BULK 2
  47 #define REDIS_CMD_MULTIBULK 4
  48
  49 #define REDIS_NOTUSED(V) ((void) V)
  50
  51 static struct config {
  52     char *hostip;
  53     int hostport;
  54     long repeat;
  55     int dbnum;
  56     int interactive;
  57     int monitor_mode;
  58     int pubsub_mode;
  59     int raw_output;
  60     char *auth;
  61 } config;
  62
  63 struct redisCommand {
  64     char *name;
  65     int arity;
  66     int flags;
  67 };
  68
  69 #define CMDFLAG_NONE 0
  70 #define CMDFLAG_RAWOUTPUT 1
  71
  72 static struct redisCommand cmdTable[] = {
  73     {"auth",2,CMDFLAG_NONE},
  74     {"get",2,CMDFLAG_NONE},
  75     {"set",3,CMDFLAG_NONE},
  76     {"setnx",3,CMDFLAG_NONE},
  77     {"setex",4,CMDFLAG_NONE},
  78     {"append",3,CMDFLAG_NONE},
  79     {"substr",4,CMDFLAG_NONE},
  80     {"del",-2,CMDFLAG_NONE},
  81     {"exists",2,CMDFLAG_NONE},
  82     {"incr",2,CMDFLAG_NONE},
  83     {"decr",2,CMDFLAG_NONE},
  84     {"rpush",3,CMDFLAG_NONE},
  85     {"lpush",3,CMDFLAG_NONE},
  86     {"rpop",2,CMDFLAG_NONE},
  87     {"lpop",2,CMDFLAG_NONE},
  88     {"brpop",-3,CMDFLAG_NONE},
  89     {"blpop",-3,CMDFLAG_NONE},
  90     {"llen",2,CMDFLAG_NONE},
  91     {"lindex",3,CMDFLAG_NONE},
  92     {"lset",4,CMDFLAG_NONE},
  93     {"lrange",4,CMDFLAG_NONE},
  94     {"ltrim",4,CMDFLAG_NONE},
  95     {"lrem",4,CMDFLAG_NONE},
  96     {"rpoplpush",3,CMDFLAG_NONE},
  97     {"sadd",3,CMDFLAG_NONE},
  98     {"srem",3,CMDFLAG_NONE},
  99     {"smove",4,CMDFLAG_NONE},
 100     {"sismember",3,CMDFLAG_NONE},
 101     {"scard",2,CMDFLAG_NONE},
 102     {"spop",2,CMDFLAG_NONE},
 103     {"srandmember",2,CMDFLAG_NONE},
 104     {"sinter",-2,CMDFLAG_NONE},
 105     {"sinterstore",-3,CMDFLAG_NONE},
 106     {"sunion",-2,CMDFLAG_NONE},
 107     {"sunionstore",-3,CMDFLAG_NONE},
 108     {"sdiff",-2,CMDFLAG_NONE},
 109     {"sdiffstore",-3,CMDFLAG_NONE},
 110     {"smembers",2,CMDFLAG_NONE},
 111     {"zadd",4,CMDFLAG_NONE},
 112     {"zincrby",4,CMDFLAG_NONE},
 113     {"zrem",3,CMDFLAG_NONE},
 114     {"zremrangebyscore",4,CMDFLAG_NONE},
 115     {"zmerge",-3,CMDFLAG_NONE},
 116     {"zmergeweighed",-4,CMDFLAG_NONE},
 117     {"zrange",-4,CMDFLAG_NONE},
 118     {"zrank",3,CMDFLAG_NONE},
 119     {"zrevrank",3,CMDFLAG_NONE},
 120     {"zrangebyscore",-4,CMDFLAG_NONE},
 121     {"zcount",4,CMDFLAG_NONE},
 122     {"zrevrange",-4,CMDFLAG_NONE},
 123     {"zcard",2,CMDFLAG_NONE},
 124     {"zscore",3,CMDFLAG_NONE},
 125     {"incrby",3,CMDFLAG_NONE},
 126     {"decrby",3,CMDFLAG_NONE},
 127     {"getset",3,CMDFLAG_NONE},
 128     {"randomkey",1,CMDFLAG_NONE},
 129     {"select",2,CMDFLAG_NONE},
 130     {"move",3,CMDFLAG_NONE},
 131     {"rename",3,CMDFLAG_NONE},
 132     {"renamenx",3,CMDFLAG_NONE},
 133     {"keys",2,CMDFLAG_NONE},
 134     {"dbsize",1,CMDFLAG_NONE},
 135     {"ping",1,CMDFLAG_NONE},
 136     {"echo",2,CMDFLAG_NONE},
 137     {"save",1,CMDFLAG_NONE},
 138     {"bgsave",1,CMDFLAG_NONE},
 139     {"rewriteaof",1,CMDFLAG_NONE},
 140     {"bgrewriteaof",1,CMDFLAG_NONE},
 141     {"shutdown",1,CMDFLAG_NONE},
 142     {"lastsave",1,CMDFLAG_NONE},
 143     {"type",2,CMDFLAG_NONE},
 144     {"flushdb",1,CMDFLAG_NONE},
 145     {"flushall",1,CMDFLAG_NONE},
 146     {"sort",-2,CMDFLAG_NONE},
 147     {"info",1,CMDFLAG_RAWOUTPUT},
 148     {"mget",-2,CMDFLAG_NONE},
 149     {"expire",3,CMDFLAG_NONE},
 150     {"expireat",3,CMDFLAG_NONE},
 151     {"ttl",2,CMDFLAG_NONE},
 152     {"slaveof",3,CMDFLAG_NONE},
 153     {"debug",-2,CMDFLAG_NONE},
 154     {"mset",-3,CMDFLAG_NONE},
 155     {"msetnx",-3,CMDFLAG_NONE},
 156     {"monitor",1,CMDFLAG_NONE},
 157     {"multi",1,CMDFLAG_NONE},
 158     {"exec",1,CMDFLAG_NONE},
 159     {"discard",1,CMDFLAG_NONE},
 160     {"hset",4,CMDFLAG_NONE},
 161     {"hget",3,CMDFLAG_NONE},
 162     {"hmset",-4,CMDFLAG_NONE},
 163     {"hmget",-3,CMDFLAG_NONE},
 164     {"hincrby",4,CMDFLAG_NONE},
 165     {"hdel",3,CMDFLAG_NONE},
 166     {"hlen",2,CMDFLAG_NONE},
 167     {"hkeys",2,CMDFLAG_NONE},
 168     {"hvals",2,CMDFLAG_NONE},
 169     {"hgetall",2,CMDFLAG_NONE},
 170     {"hexists",3,CMDFLAG_NONE},
 171     {"config",-2,CMDFLAG_NONE},
 172     {"subscribe",-2,CMDFLAG_NONE},
 173     {"unsubscribe",-1,CMDFLAG_NONE},
 174     {"psubscribe",-2,CMDFLAG_NONE},
 175     {"punsubscribe",-1,CMDFLAG_NONE},
 176     {"publish",3,CMDFLAG_NONE},
 177     {NULL,0,CMDFLAG_NONE}
 178 };
 179
 180 static int cliReadReply(int fd);
 181 static void usage();
 182
 183 static struct redisCommand *lookupCommand(char *name) {
 184     int j = 0;
 185     while(cmdTable[j].name != NULL) {
 186         if (!strcasecmp(name,cmdTable[j].name)) return &cmdTable[j];
 187         j++;
 188     }
 189     return NULL;
 190 }
 191
 192 static int cliConnect(void) {
 193     char err[ANET_ERR_LEN];
 194     static int fd = ANET_ERR;
 195
 196     if (fd == ANET_ERR) {
 197         fd = anetTcpConnect(err,config.hostip,config.hostport);
 198         if (fd == ANET_ERR) {
 199             fprintf(stderr, "Could not connect to Redis at %s:%d: %s", config.hostip, config.hostport, err);
 200             return -1;
 201         }
 202         anetTcpNoDelay(NULL,fd);
 203     }
 204     return fd;
 205 }
 206
 207 static sds cliReadLine(int fd) {
 208     sds line = sdsempty();
 209
 210     while(1) {
 211         char c;
 212         ssize_t ret;
 213
 214         ret = read(fd,&c,1);
 215         if (ret == -1) {
 216             sdsfree(line);
 217             return NULL;
 218         } else if ((ret == 0) || (c == '\n')) {
 219             break;
 220         } else {
 221             line = sdscatlen(line,&c,1);
 222         }
 223     }
 224     return sdstrim(line,"\r\n");
 225 }
 226
 227 static int cliReadSingleLineReply(int fd, int quiet) {
 228     sds reply = cliReadLine(fd);
 229
 230     if (reply == NULL) return 1;
 231     if (!quiet)
 232         printf("%s\n", reply);
 233     sdsfree(reply);
 234     return 0;
 235 }
 236
 237 static void printStringRepr(char *s, int len) {
 238     printf("\"");
 239     while(len--) {
 240         switch(*s) {
 241         case '\\':
 242         case '"':
 243             printf("\\%c",*s);
 244             break;
 245         case '\n': printf("\\n"); break;
 246         case '\r': printf("\\r"); break;
 247         case '\t': printf("\\t"); break;
 248         case '\a': printf("\\a"); break;
 249         case '\b': printf("\\b"); break;
 250         default:
 251             if (isprint(*s))
 252                 printf("%c",*s);
 253             else
 254                 printf("\\x%02x",(unsigned char)*s);
 255             break;
 256         }
 257         s++;
 258     }
 259     printf("\"\n");
 260 }
 261
 262 static int cliReadBulkReply(int fd) {
 263     sds replylen = cliReadLine(fd);
 264     char *reply, crlf[2];
 265     int bulklen;
 266
 267     if (replylen == NULL) return 1;
 268     bulklen = atoi(replylen);
 269     if (bulklen == -1) {
 270         sdsfree(replylen);
 271         printf("(nil)\n");
 272         return 0;
 273     }
 274     reply = zmalloc(bulklen);
 275     anetRead(fd,reply,bulklen);
 276     anetRead(fd,crlf,2);
 277     if (config.raw_output || !isatty(fileno(stdout))) {
 278         if (bulklen && fwrite(reply,bulklen,1,stdout) == 0) {
 279             zfree(reply);
 280             return 1;
 281         }
 282     } else {
 283         /* If you are producing output for the standard output we want
 284          * a more interesting output with quoted characters and so forth */
 285         printStringRepr(reply,bulklen);
 286     }
 287     zfree(reply);
 288     return 0;
 289 }
 290
 291 static int cliReadMultiBulkReply(int fd) {
 292     sds replylen = cliReadLine(fd);
 293     int elements, c = 1;
 294
 295     if (replylen == NULL) return 1;
 296     elements = atoi(replylen);
 297     if (elements == -1) {
 298         sdsfree(replylen);
 299         printf("(nil)\n");
 300         return 0;
 301     }
 302     if (elements == 0) {
 303         printf("(empty list or set)\n");
 304     }
 305     while(elements--) {
 306         printf("%d. ", c);
 307         if (cliReadReply(fd)) return 1;
 308         c++;
 309     }
 310     return 0;
 311 }
 312
 313 static int cliReadReply(int fd) {
 314     char type;
 315
 316     if (anetRead(fd,&type,1) <= 0) exit(1);
 317     switch(type) {
 318     case '-':
 319         printf("(error) ");
 320         cliReadSingleLineReply(fd,0);
 321         return 1;
 322     case '+':
 323         return cliReadSingleLineReply(fd,0);
 324     case ':':
 325         printf("(integer) ");
 326         return cliReadSingleLineReply(fd,0);
 327     case '$':
 328         return cliReadBulkReply(fd);
 329     case '*':
 330         return cliReadMultiBulkReply(fd);
 331     default:
 332         printf("protocol error, got '%c' as reply type byte\n", type);
 333         return 1;
 334     }
 335 }
 336
 337 static int selectDb(int fd) {
 338     int retval;
 339     sds cmd;
 340     char type;
 341
 342     if (config.dbnum == 0)
 343         return 0;
 344
 345     cmd = sdsempty();
 346     cmd = sdscatprintf(cmd,"SELECT %d\r\n",config.dbnum);
 347     anetWrite(fd,cmd,sdslen(cmd));
 348     anetRead(fd,&type,1);
 349     if (type <= 0 || type != '+') return 1;
 350     retval = cliReadSingleLineReply(fd,1);
 351     if (retval) {
 352         return retval;
 353     }
 354     return 0;
 355 }
 356
 357 static int cliSendCommand(int argc, char **argv, int repeat) {
 358     struct redisCommand *rc = lookupCommand(argv[0]);
 359     int fd, j, retval = 0;
 360     sds cmd;
 361
 362     if (!rc) {
 363         fprintf(stderr,"Unknown command '%s'\n",argv[0]);
 364         return 1;
 365     }
 366     config.raw_output = (rc->flags & CMDFLAG_RAWOUTPUT);
 367
 368     if ((rc->arity > 0 && argc != rc->arity) ||
 369         (rc->arity < 0 && argc < -rc->arity)) {
 370             fprintf(stderr,"Wrong number of arguments for '%s'\n",rc->name);
 371             return 1;
 372     }
 373     if (!strcasecmp(rc->name,"monitor")) config.monitor_mode = 1;
 374     if (!strcasecmp(rc->name,"subscribe") ||
 375         !strcasecmp(rc->name,"psubscribe")) config.pubsub_mode = 1;
 376     if ((fd = cliConnect()) == -1) return 1;
 377
 378     /* Select db number */
 379     retval = selectDb(fd);
 380     if (retval) {
 381         fprintf(stderr,"Error setting DB num\n");
 382         return 1;
 383     }
 384
 385     while(repeat--) {
 386         /* Build the command to send */
 387         cmd = sdscatprintf(sdsempty(),"*%d\r\n",argc);
 388         for (j = 0; j < argc; j++) {
 389             cmd = sdscatprintf(cmd,"$%lu\r\n",
 390                 (unsigned long)sdslen(argv[j]));
 391             cmd = sdscatlen(cmd,argv[j],sdslen(argv[j]));
 392             cmd = sdscatlen(cmd,"\r\n",2);
 393         }
 394         anetWrite(fd,cmd,sdslen(cmd));
 395         sdsfree(cmd);
 396
 397         while (config.monitor_mode) {
 398             cliReadSingleLineReply(fd,0);
 399         }
 400
 401         if (config.pubsub_mode) {
 402             printf("Reading messages... (press Ctrl-c to quit)\n");
 403             while (1) {
 404                 cliReadReply(fd);
 405                 printf("\n");
 406             }
 407         }
 408
 409         retval = cliReadReply(fd);
 410         if (retval) {
 411             return retval;
 412         }
 413     }
 414     return 0;
 415 }
 416
 417 static int parseOptions(int argc, char **argv) {
 418     int i;
 419
 420     for (i = 1; i < argc; i++) {
 421         int lastarg = i==argc-1;
 422
 423         if (!strcmp(argv[i],"-h") && !lastarg) {
 424             char *ip = zmalloc(32);
 425             if (anetResolve(NULL,argv[i+1],ip) == ANET_ERR) {
 426                 printf("Can't resolve %s\n", argv[i]);
 427                 exit(1);
 428             }
 429             config.hostip = ip;
 430             i++;
 431         } else if (!strcmp(argv[i],"-h") && lastarg) {
 432             usage();
 433         } else if (!strcmp(argv[i],"-p") && !lastarg) {
 434             config.hostport = atoi(argv[i+1]);
 435             i++;
 436         } else if (!strcmp(argv[i],"-r") && !lastarg) {
 437             config.repeat = strtoll(argv[i+1],NULL,10);
 438             i++;
 439         } else if (!strcmp(argv[i],"-n") && !lastarg) {
 440             config.dbnum = atoi(argv[i+1]);
 441             i++;
 442         } else if (!strcmp(argv[i],"-a") && !lastarg) {
 443             config.auth = argv[i+1];
 444             i++;
 445         } else if (!strcmp(argv[i],"-i")) {
 446             config.interactive = 1;
 447         } else {
 448             break;
 449         }
 450     }
 451     return i;
 452 }
 453
 454 static sds readArgFromStdin(void) {
 455     char buf[1024];
 456     sds arg = sdsempty();
 457
 458     while(1) {
 459         int nread = read(fileno(stdin),buf,1024);
 460
 461         if (nread == 0) break;
 462         else if (nread == -1) {
 463             perror("Reading from standard input");
 464             exit(1);
 465         }
 466         arg = sdscatlen(arg,buf,nread);
 467     }
 468     return arg;
 469 }
 470
 471 static void usage() {
 472     fprintf(stderr, "usage: redis-cli [-h host] [-p port] [-a authpw] [-r repeat_times] [-n db_num] [-i] cmd arg1 arg2 arg3 ... argN\n");
 473     fprintf(stderr, "usage: echo \"argN\" | redis-cli [-h host] [-a authpw] [-p port] [-r repeat_times] [-n db_num] cmd arg1 arg2 ... arg(N-1)\n");
 474     fprintf(stderr, "\nIf a pipe from standard input is detected this data is used as last argument.\n\n");
 475     fprintf(stderr, "example: cat /etc/passwd | redis-cli set my_passwd\n");
 476     fprintf(stderr, "example: redis-cli get my_passwd\n");
 477     fprintf(stderr, "example: redis-cli -r 100 lpush mylist x\n");
 478     fprintf(stderr, "\nRun in interactive mode: redis-cli -i or just don't pass any command\n");
 479     exit(1);
 480 }
 481
 482 /* Turn the plain C strings into Sds strings */
 483 static char **convertToSds(int count, char** args) {
 484   int j;
 485   char **sds = zmalloc(sizeof(char*)*count+1);
 486
 487   for(j = 0; j < count; j++)
 488     sds[j] = sdsnew(args[j]);
 489
 490   return sds;
 491 }
 492
 493 static char **splitArguments(char *line, int *argc) {
 494     char *p = line;
 495     char *current = NULL;
 496     char **vector = NULL;
 497
 498     *argc = 0;
 499     while(1) {
 500         /* skip blanks */
 501         while(*p && isspace(*p)) p++;
 502         if (*p) {
 503             /* get a token */
 504             int inq=0; /* set to 1 if we are in "quotes" */
 505             int done = 0;
 506
 507             if (current == NULL) current = sdsempty();
 508             while(!done) {
 509                 if (inq) {
 510                     if (*p == '\\' && *(p+1)) {
 511                         char c;
 512
 513                         p++;
 514                         switch(*p) {
 515                         case 'n': c = '\n'; break;
 516                         case 'r': c = '\r'; break;
 517                         case 't': c = '\t'; break;
 518                         case 'b': c = '\b'; break;
 519                         case 'a': c = '\a'; break;
 520                         default: c = *p; break;
 521                         }
 522                         current = sdscatlen(current,&c,1);
 523                     } else if (*p == '"') {
 524                         done = 1;
 525                     } else {
 526                         current = sdscatlen(current,p,1);
 527                     }
 528                 } else {
 529                     switch(*p) {
 530                     case ' ':
 531                     case '\n':
 532                     case '\r':
 533                     case '\t':
 534                     case '\0':
 535                         done=1;
 536                         break;
 537                     case '"':
 538                         inq=1;
 539                         break;
 540                     default:
 541                         current = sdscatlen(current,p,1);
 542                         break;
 543                     }
 544                 }
 545                 if (*p) p++;
 546             }
 547             /* add the token to the vector */
 548             vector = zrealloc(vector,((*argc)+1)*sizeof(char*));
 549             vector[*argc] = current;
 550             (*argc)++;
 551             current = NULL;
 552         } else {
 553             return vector;
 554         }
 555     }
 556 }
 557
 558 #define LINE_BUFLEN 4096
 559 static void repl() {
 560     int argc, j;
 561     char *line, **argv;
 562
 563     while((line = linenoise("redis> ")) != NULL) {
 564         if (line[0] != '\0') {
 565             argv = splitArguments(line,&argc);
 566             linenoiseHistoryAdd(line);
 567             if (argc > 0) {
 568                 if (strcasecmp(argv[0],"quit") == 0 ||
 569                     strcasecmp(argv[0],"exit") == 0)
 570                         exit(0);
 571                 else
 572                     cliSendCommand(argc, argv, 1);
 573             }
 574             /* Free the argument vector */
 575             for (j = 0; j < argc; j++)
 576                 sdsfree(argv[j]);
 577             zfree(argv);
 578         }
 579         /* linenoise() returns malloc-ed lines like readline() */
 580         free(line);
 581     }
 582     exit(0);
 583 }
 584
 585 int main(int argc, char **argv) {
 586     int firstarg;
 587     char **argvcopy;
 588     struct redisCommand *rc;
 589
 590     config.hostip = "127.0.0.1";
 591     config.hostport = 6379;
 592     config.repeat = 1;
 593     config.dbnum = 0;
 594     config.interactive = 0;
 595     config.monitor_mode = 0;
 596     config.pubsub_mode = 0;
 597     config.raw_output = 0;
 598     config.auth = NULL;
 599
 600     firstarg = parseOptions(argc,argv);
 601     argc -= firstarg;
 602     argv += firstarg;
 603
 604     if (config.auth != NULL) {
 605         char *authargv[2];
 606
 607         authargv[0] = "AUTH";
 608         authargv[1] = config.auth;
 609         cliSendCommand(2, convertToSds(2, authargv), 1);
 610     }
 611
 612     if (argc == 0 || config.interactive == 1) repl();
 613
 614     argvcopy = convertToSds(argc, argv);
 615
 616     /* Read the last argument from stdandard input if needed */
 617     if ((rc = lookupCommand(argv[0])) != NULL) {
 618       if (rc->arity > 0 && argc == rc->arity-1) {
 619         sds lastarg = readArgFromStdin();
 620         argvcopy[argc] = lastarg;
 621         argc++;
 622       }
 623     }
 624
 625     return cliSendCommand(argc, argvcopy, config.repeat);
 626 }