1 /*
2 * Copyright (c) 2018, Salvatore Sanfilippo <antirez at gmail dot com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * * Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * * Neither the name of Redis nor the names of its contributors may be used
14 * to endorse or promote products derived from this software without
15 * specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 *
29 * ----------------------------------------------------------------------------
30 *
31 * This file implements the LOLWUT command. The command should do something
32 * fun and interesting, and should be replaced by a new implementation at
33 * each new version of Redis.
34 */
35
36 #include "server.h"
37
38 void lolwut5Command(client *c);
39
40 /* The default target for LOLWUT if no matching version was found.
41 * This is what unstable versions of Redis will display. */
lolwutUnstableCommand(client * c)42 void lolwutUnstableCommand(client *c) {
43 sds rendered = sdsnew("Redis ver. ");
44 rendered = sdscat(rendered,REDIS_VERSION);
45 rendered = sdscatlen(rendered,"\n",1);
46 addReplyBulkSds(c,rendered);
47 }
48
lolwutCommand(client * c)49 void lolwutCommand(client *c) {
50 char *v = REDIS_VERSION;
51 if ((v[0] == '5' && v[1] == '.') ||
52 (v[0] == '4' && v[1] == '.' && v[2] == '9'))
53 lolwut5Command(c);
54 else
55 lolwutUnstableCommand(c);
56 }
57