From a37f8ec8b478fccc2266703aef6bc5f334582b18 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Thu, 25 Sep 2014 17:01:56 +0200
Subject: [PATCH] DEBUG POPULATE two args form implemented.

The old DEBUG POPULATE form for automatic creation of test keys is:

    DEBUG POPULATE <count>

Now an additional form is available:

    DEBUG POPULATE <count> <prefix>

When prefix is not specified, it defaults to "key", so the keys are
named incrementally from key:0 to key:<count-1>. Otherwise the specified
prefix is used instead of "key".

The command is useful in order to populate different Redis instances
with key names guaranteed to don't collide. There are other debugging
uses, for example it is possible to add additional N keys using a count
of N and a random prefix at every call.
---
 src/debug.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/debug.c b/src/debug.c
index 99f8b89c..a6c2bfbb 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -325,7 +325,8 @@ void debugCommand(redisClient *c) {
                 (long long) sdslen(val->ptr),
                 (long long) sdsavail(val->ptr));
         }
-    } else if (!strcasecmp(c->argv[1]->ptr,"populate") && c->argc == 3) {
+    } else if (!strcasecmp(c->argv[1]->ptr,"populate") &&
+               (c->argc == 3 || c->argc == 4)) {
         long keys, j;
         robj *key, *val;
         char buf[128];
@@ -334,7 +335,8 @@ void debugCommand(redisClient *c) {
             return;
         dictExpand(c->db->dict,keys);
         for (j = 0; j < keys; j++) {
-            snprintf(buf,sizeof(buf),"key:%lu",j);
+            snprintf(buf,sizeof(buf),"%s:%lu",
+                (c->argc == 3) ? "key" : c->argv[3]->ptr, j);
             key = createStringObject(buf,strlen(buf));
             if (lookupKeyRead(c->db,key) != NULL) {
                 decrRefCount(key);