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
  38 #include "anet.h"
  39 #include "sds.h"
  40 #include "adlist.h"
  41 #include "zmalloc.h"
  42
  43 #define REDIS_CMD_INLINE 1
  44 #define REDIS_CMD_BULK 2
  45 #define REDIS_CMD_MULTIBULK 4
  46
  47 #define REDIS_NOTUSED(V) ((void) V)
  48
  49 static struct config {
  50     char *hostip;
  51     int hostport;
  52     long repeat;
  53     int dbnum;
  54     int interactive;
  55     char *authpw;
  56 } config;
  57
  58 struct redisCommand {
  59     char *name;
  60     int arity;
  61     int flags;
  62 };
  63
  64 static struct redisCommand cmdTable[] = {
  65     {"auth",2,REDIS_CMD_INLINE},
  66     {"get",2,REDIS_CMD_INLINE},
  67     {"set",3,REDIS_CMD_BULK},
  68     {"setnx",3,REDIS_CMD_BULK},
  69     {"append",3,REDIS_CMD_BULK},
  70     {"substr",4,REDIS_CMD_INLINE},
  71     {"del",-2,REDIS_CMD_INLINE},
  72     {"exists",2,REDIS_CMD_INLINE},
  73     {"incr",2,REDIS_CMD_INLINE},
  74     {"decr",2,REDIS_CMD_INLINE},
  75     {"rpush",3,REDIS_CMD_BULK},
  76     {"lpush",3,REDIS_CMD_BULK},
  77     {"rpop",2,REDIS_CMD_INLINE},
  78     {"lpop",2,REDIS_CMD_INLINE},
  79     {"brpop",-3,REDIS_CMD_INLINE},
  80     {"blpop",-3,REDIS_CMD_INLINE},
  81     {"llen",2,REDIS_CMD_INLINE},
  82     {"lindex",3,REDIS_CMD_INLINE},
  83     {"lset",4,REDIS_CMD_BULK},
  84     {"lrange",4,REDIS_CMD_INLINE},
  85     {"ltrim",4,REDIS_CMD_INLINE},
  86     {"lrem",4,REDIS_CMD_BULK},
  87     {"rpoplpush",3,REDIS_CMD_BULK},
  88     {"sadd",3,REDIS_CMD_BULK},
  89     {"srem",3,REDIS_CMD_BULK},
  90     {"smove",4,REDIS_CMD_BULK},
  91     {"sismember",3,REDIS_CMD_BULK},
  92     {"scard",2,REDIS_CMD_INLINE},
  93     {"spop",2,REDIS_CMD_INLINE},
  94     {"srandmember",2,REDIS_CMD_INLINE},
  95     {"sinter",-2,REDIS_CMD_INLINE},
  96     {"sinterstore",-3,REDIS_CMD_INLINE},
  97     {"sunion",-2,REDIS_CMD_INLINE},
  98     {"sunionstore",-3,REDIS_CMD_INLINE},
  99     {"sdiff",-2,REDIS_CMD_INLINE},
 100     {"sdiffstore",-3,REDIS_CMD_INLINE},
 101     {"smembers",2,REDIS_CMD_INLINE},
 102     {"zadd",4,REDIS_CMD_BULK},
 103     {"zincrby",4,REDIS_CMD_BULK},
 104     {"zrem",3,REDIS_CMD_BULK},
 105     {"zremrangebyscore",4,REDIS_CMD_INLINE},
 106     {"zmerge",-3,REDIS_CMD_INLINE},
 107     {"zmergeweighed",-4,REDIS_CMD_INLINE},
 108     {"zrange",-4,REDIS_CMD_INLINE},
 109     {"zrank",3,REDIS_CMD_BULK},
 110     {"zrevrank",3,REDIS_CMD_BULK},
 111     {"zrangebyscore",-4,REDIS_CMD_INLINE},
 112     {"zcount",4,REDIS_CMD_INLINE},
 113     {"zrevrange",-4,REDIS_CMD_INLINE},
 114     {"zcard",2,REDIS_CMD_INLINE},
 115     {"zscore",3,REDIS_CMD_BULK},
 116     {"incrby",3,REDIS_CMD_INLINE},
 117     {"decrby",3,REDIS_CMD_INLINE},
 118     {"getset",3,REDIS_CMD_BULK},
 119     {"randomkey",1,REDIS_CMD_INLINE},
 120     {"select",2,REDIS_CMD_INLINE},
 121     {"move",3,REDIS_CMD_INLINE},
 122     {"rename",3,REDIS_CMD_INLINE},
 123     {"renamenx",3,REDIS_CMD_INLINE},
 124     {"keys",2,REDIS_CMD_INLINE},
 125     {"dbsize",1,REDIS_CMD_INLINE},
 126     {"ping",1,REDIS_CMD_INLINE},
 127     {"echo",2,REDIS_CMD_BULK},
 128     {"save",1,REDIS_CMD_INLINE},
 129     {"bgsave",1,REDIS_CMD_INLINE},
 130     {"rewriteaof",1,REDIS_CMD_INLINE},
 131     {"bgrewriteaof",1,REDIS_CMD_INLINE},
 132     {"shutdown",1,REDIS_CMD_INLINE},
 133     {"lastsave",1,REDIS_CMD_INLINE},
 134     {"type",2,REDIS_CMD_INLINE},
 135     {"flushdb",1,REDIS_CMD_INLINE},
 136     {"flushall",1,REDIS_CMD_INLINE},
 137     {"sort",-2,REDIS_CMD_INLINE},
 138     {"info",1,REDIS_CMD_INLINE},
 139     {"mget",-2,REDIS_CMD_INLINE},
 140     {"expire",3,REDIS_CMD_INLINE},
 141     {"expireat",3,REDIS_CMD_INLINE},
 142     {"ttl",2,REDIS_CMD_INLINE},
 143     {"slaveof",3,REDIS_CMD_INLINE},
 144     {"debug",-2,REDIS_CMD_INLINE},
 145     {"mset",-3,REDIS_CMD_MULTIBULK},
 146     {"msetnx",-3,REDIS_CMD_MULTIBULK},
 147     {"monitor",1,REDIS_CMD_INLINE},
 148     {"multi",1,REDIS_CMD_INLINE},
 149     {"exec",1,REDIS_CMD_INLINE},
 150     {"discard",1,REDIS_CMD_INLINE},
 151     {"hset",4,REDIS_CMD_MULTIBULK},
 152     {"hget",3,REDIS_CMD_BULK},
 153     {"hdel",3,REDIS_CMD_BULK},
 154     {"hlen",2,REDIS_CMD_INLINE},
 155     {"hkeys",2,REDIS_CMD_INLINE},
 156     {"hvals",2,REDIS_CMD_INLINE},
 157     {"hgetall",2,REDIS_CMD_INLINE},
 158     {"hexists",3,REDIS_CMD_BULK},
 159     {NULL,0,0}
 160 };
 161
 162 static int cliReadReply(int fd);
 163 static void usage();
 164
 165 static struct redisCommand *lookupCommand(char *name) {
 166     int j = 0;
 167     while(cmdTable[j].name != NULL) {
 168         if (!strcasecmp(name,cmdTable[j].name)) return &cmdTable[j];
 169         j++;
 170     }
 171     return NULL;
 172 }
 173
 174 static int cliConnect(void) {
 175     char err[ANET_ERR_LEN];
 176     static int fd = ANET_ERR;
 177
 178     if (fd == ANET_ERR) {
 179         fd = anetTcpConnect(err,config.hostip,config.hostport);
 180         if (fd == ANET_ERR) {
 181             fprintf(stderr, "Could not connect to Redis at %s:%d: %s", config.hostip, config.hostport, err);
 182             return -1;
 183         }
 184         anetTcpNoDelay(NULL,fd);
 185     }
 186     return fd;
 187 }
 188
 189 static sds cliReadLine(int fd) {
 190     sds line = sdsempty();
 191
 192     while(1) {
 193         char c;
 194         ssize_t ret;
 195
 196         ret = read(fd,&c,1);
 197         if (ret == -1) {
 198             sdsfree(line);
 199             return NULL;
 200         } else if ((ret == 0) || (c == '\n')) {
 201             break;
 202         } else {
 203             line = sdscatlen(line,&c,1);
 204         }
 205     }
 206     return sdstrim(line,"\r\n");
 207 }
 208
 209 static int cliReadSingleLineReply(int fd, int quiet) {
 210     sds reply = cliReadLine(fd);
 211
 212     if (reply == NULL) return 1;
 213     if (!quiet)
 214         printf("%s\n", reply);
 215     sdsfree(reply);
 216     return 0;
 217 }
 218
 219 static int cliReadBulkReply(int fd) {
 220     sds replylen = cliReadLine(fd);
 221     char *reply, crlf[2];
 222     int bulklen;
 223
 224     if (replylen == NULL) return 1;
 225     bulklen = atoi(replylen);
 226     if (bulklen == -1) {
 227         sdsfree(replylen);
 228         printf("(nil)\n");
 229         return 0;
 230     }
 231     reply = zmalloc(bulklen);
 232     anetRead(fd,reply,bulklen);
 233     anetRead(fd,crlf,2);
 234     if (bulklen && fwrite(reply,bulklen,1,stdout) == 0) {
 235         zfree(reply);
 236         return 1;
 237     }
 238     if (isatty(fileno(stdout)) && reply[bulklen-1] != '\n')
 239         printf("\n");
 240     zfree(reply);
 241     return 0;
 242 }
 243
 244 static int cliReadMultiBulkReply(int fd) {
 245     sds replylen = cliReadLine(fd);
 246     int elements, c = 1;
 247
 248     if (replylen == NULL) return 1;
 249     elements = atoi(replylen);
 250     if (elements == -1) {
 251         sdsfree(replylen);
 252         printf("(nil)\n");
 253         return 0;
 254     }
 255     if (elements == 0) {
 256         printf("(empty list or set)\n");
 257     }
 258     while(elements--) {
 259         printf("%d. ", c);
 260         if (cliReadReply(fd)) return 1;
 261         c++;
 262     }
 263     return 0;
 264 }
 265
 266 static int cliReadReply(int fd) {
 267     char type;
 268
 269     if (anetRead(fd,&type,1) <= 0) exit(1);
 270     switch(type) {
 271     case '-':
 272         printf("(error) ");
 273         cliReadSingleLineReply(fd,0);
 274         return 1;
 275     case '+':
 276         return cliReadSingleLineReply(fd,0);
 277     case ':':
 278         printf("(integer) ");
 279         return cliReadSingleLineReply(fd,0);
 280     case '$':
 281         return cliReadBulkReply(fd);
 282     case '*':
 283         return cliReadMultiBulkReply(fd);
 284     default:
 285         printf("protocol error, got '%c' as reply type byte\n", type);
 286         return 1;
 287     }
 288 }
 289
 290 static int selectDb(int fd) {
 291     int retval;
 292     sds cmd;
 293     char type;
 294
 295     if (config.dbnum == 0)
 296         return 0;
 297
 298     cmd = sdsempty();
 299     cmd = sdscatprintf(cmd,"SELECT %d\r\n",config.dbnum);
 300     anetWrite(fd,cmd,sdslen(cmd));
 301     anetRead(fd,&type,1);
 302     if (type <= 0 || type != '+') return 1;
 303     retval = cliReadSingleLineReply(fd,1);
 304     if (retval) {
 305         return retval;
 306     }
 307     return 0;
 308 }
 309
 310 static int cliLogin(int fd)
 311 {
 312     int retval = 1;
 313     sds cmd;
 314     char type;
 315     if (config.authpw[0] != '\0') {
 316         cmd = sdsempty();
 317         cmd = sdscatprintf(cmd,"AUTH %s\r\n",config.authpw);
 318         anetWrite(fd,cmd,sdslen(cmd));
 319         anetRead(fd,&type,1);
 320         if (type == '+')
 321             retval = 0;
 322         int ret2 = cliReadSingleLineReply(fd,1);
 323         if (ret2)
 324             close(fd);
 325     } else {
 326         retval = 0;
 327     }
 328     return retval;
 329 }
 330
 331 static int cliSendCommand(int argc, char **argv) {
 332     struct redisCommand *rc = lookupCommand(argv[0]);
 333     int fd, j, retval = 0;
 334     int read_forever = 0;
 335     sds cmd;
 336
 337     if (!rc) {
 338         fprintf(stderr,"Unknown command '%s'\n",argv[0]);
 339         return 1;
 340     }
 341
 342     if ((rc->arity > 0 && argc != rc->arity) ||
 343         (rc->arity < 0 && argc < -rc->arity)) {
 344             fprintf(stderr,"Wrong number of arguments for '%s'\n",rc->name);
 345             return 1;
 346     }
 347     if (!strcasecmp(rc->name,"monitor")) read_forever = 1;
 348     if ((fd = cliConnect()) == -1) return 1;
 349
 350     /* Select db number */
 351     retval = selectDb(fd);
 352     if (retval) {
 353         fprintf(stderr,"Error setting DB num\n");
 354         return 1;
 355     }
 356
 357     /* Login if necessary */
 358     retval = cliLogin(fd);
 359     if (retval) {
 360         fprintf(stderr,"Authentication failed\n");
 361         return 1;
 362     }
 363
 364     while(config.repeat--) {
 365         /* Build the command to send */
 366         cmd = sdsempty();
 367         if (rc->flags & REDIS_CMD_MULTIBULK) {
 368             cmd = sdscatprintf(cmd,"*%d\r\n",argc);
 369             for (j = 0; j < argc; j++) {
 370                 cmd = sdscatprintf(cmd,"$%lu\r\n",
 371                     (unsigned long)sdslen(argv[j]));
 372                 cmd = sdscatlen(cmd,argv[j],sdslen(argv[j]));
 373                 cmd = sdscatlen(cmd,"\r\n",2);
 374             }
 375         } else {
 376             for (j = 0; j < argc; j++) {
 377                 if (j != 0) cmd = sdscat(cmd," ");
 378                 if (j == argc-1 && rc->flags & REDIS_CMD_BULK) {
 379                     cmd = sdscatprintf(cmd,"%lu",
 380                         (unsigned long)sdslen(argv[j]));
 381                 } else {
 382                     cmd = sdscatlen(cmd,argv[j],sdslen(argv[j]));
 383                 }
 384             }
 385             cmd = sdscat(cmd,"\r\n");
 386             if (rc->flags & REDIS_CMD_BULK) {
 387                 cmd = sdscatlen(cmd,argv[argc-1],sdslen(argv[argc-1]));
 388                 cmd = sdscatlen(cmd,"\r\n",2);
 389             }
 390         }
 391         anetWrite(fd,cmd,sdslen(cmd));
 392         sdsfree(cmd);
 393
 394         while (read_forever) {
 395             cliReadSingleLineReply(fd,0);
 396         }
 397
 398         retval = cliReadReply(fd);
 399         if (retval) {
 400             return retval;
 401         }
 402     }
 403     return 0;
 404 }
 405
 406 static int parseOptions(int argc, char **argv) {
 407     int i;
 408
 409     for (i = 1; i < argc; i++) {
 410         int lastarg = i==argc-1;
 411
 412         if (!strcmp(argv[i],"-h") && !lastarg) {
 413             char *ip = zmalloc(32);
 414             if (anetResolve(NULL,argv[i+1],ip) == ANET_ERR) {
 415                 printf("Can't resolve %s\n", argv[i]);
 416                 exit(1);
 417             }
 418             config.hostip = ip;
 419             i++;
 420         } else if (!strcmp(argv[i],"-h") && lastarg) {
 421             usage();
 422         } else if (!strcmp(argv[i],"-p") && !lastarg) {
 423             config.hostport = atoi(argv[i+1]);
 424             i++;
 425         } else if (!strcmp(argv[i],"-r") && !lastarg) {
 426             config.repeat = strtoll(argv[i+1],NULL,10);
 427             i++;
 428         } else if (!strcmp(argv[i],"-n") && !lastarg) {
 429             config.dbnum = atoi(argv[i+1]);
 430             i++;
 431         } else if (!strcmp(argv[i],"-a") && !lastarg) {
 432             config.authpw = argv[i+1];
 433             i++;
 434         } else if (!strcmp(argv[i],"-i")) {
 435             config.interactive = 1;
 436         } else {
 437             break;
 438         }
 439     }
 440     return i;
 441 }
 442
 443 static sds readArgFromStdin(void) {
 444     char buf[1024];
 445     sds arg = sdsempty();
 446
 447     while(1) {
 448         int nread = read(fileno(stdin),buf,1024);
 449
 450         if (nread == 0) break;
 451         else if (nread == -1) {
 452             perror("Reading from standard input");
 453             exit(1);
 454         }
 455         arg = sdscatlen(arg,buf,nread);
 456     }
 457     return arg;
 458 }
 459
 460 static void usage() {
 461     fprintf(stderr, "usage: redis-cli [-h host] [-p port] [-a authpw] [-r repeat_times] [-n db_num] [-i] cmd arg1 arg2 arg3 ... argN\n");
 462     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");
 463     fprintf(stderr, "\nIf a pipe from standard input is detected this data is used as last argument.\n\n");
 464     fprintf(stderr, "example: cat /etc/passwd | redis-cli set my_passwd\n");
 465     fprintf(stderr, "example: redis-cli get my_passwd\n");
 466     fprintf(stderr, "example: redis-cli -r 100 lpush mylist x\n");
 467     fprintf(stderr, "\nRun in interactive mode: redis-cli -i or just don't pass any command\n");
 468     exit(1);
 469 }
 470
 471 /* Turn the plain C strings into Sds strings */
 472 static char **convertToSds(int count, char** args) {
 473   int j;
 474   char **sds = zmalloc(sizeof(char*)*count+1);
 475
 476   for(j = 0; j < count; j++)
 477     sds[j] = sdsnew(args[j]);
 478
 479   return sds;
 480 }
 481
 482 static char *prompt(char *line, int size) {
 483     char *retval;
 484
 485     do {
 486         printf(">> ");
 487         retval = fgets(line, size, stdin);
 488     } while (retval && *line == '\n');
 489     line[strlen(line) - 1] = '\0';
 490
 491     return retval;
 492 }
 493
 494 static void repl() {
 495     int size = 4096, max = size >> 1, argc;
 496     char buffer[size];
 497     char *line = buffer;
 498     char **ap, *args[max];
 499
 500     while (prompt(line, size)) {
 501         argc = 0;
 502
 503         for (ap = args; (*ap = strsep(&line, " \t")) != NULL;) {
 504             if (**ap != '\0') {
 505                 if (argc >= max) break;
 506                 if (strcasecmp(*ap,"quit") == 0 || strcasecmp(*ap,"exit") == 0)
 507                     exit(0);
 508                 ap++;
 509                 argc++;
 510             }
 511         }
 512
 513         config.repeat = 1;
 514         cliSendCommand(argc, convertToSds(argc, args));
 515         line = buffer;
 516     }
 517
 518     exit(0);
 519 }
 520
 521 int main(int argc, char **argv) {
 522     int firstarg;
 523     char **argvcopy;
 524     struct redisCommand *rc;
 525
 526     config.hostip = "127.0.0.1";
 527     config.hostport = 6379;
 528     config.repeat = 1;
 529     config.dbnum = 0;
 530     config.interactive = 0;
 531
 532     firstarg = parseOptions(argc,argv);
 533     argc -= firstarg;
 534     argv += firstarg;
 535
 536     if (argc == 0 || config.interactive == 1) repl();
 537
 538     argvcopy = convertToSds(argc, argv);
 539
 540     /* Read the last argument from stdandard input if needed */
 541     if ((rc = lookupCommand(argv[0])) != NULL) {
 542       if (rc->arity > 0 && argc == rc->arity-1) {
 543         sds lastarg = readArgFromStdin();
 544         argvcopy[argc] = lastarg;
 545         argc++;
 546       }
 547     }
 548
 549     return cliSendCommand(argc, argvcopy);
 550 }