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