last executed command in CLIENT LIST output.

src/networking.c

@@ -36,7 +36,7 @@ redisClient *createClient(int fd) {
     c->reqtype = 0;
     c->argc = 0;
     c->argv = NULL;
-    c->cmd = NULL;
+    c->cmd = c->lastcmd = NULL;
     c->multibulklen = 0;
     c->bulklen = -1;
     c->sentlen = 0;
@@ -966,7 +966,7 @@ sds getClientInfoString(redisClient *client) {
     if (emask & AE_WRITABLE) *p++ = 'w';
     *p = '\0';
     return sdscatprintf(sdsempty(),
-        "addr=%s:%d fd=%d idle=%ld flags=%s db=%d sub=%d psub=%d qbuf=%lu obl=%lu oll=%lu events=%s",
+        "addr=%s:%d fd=%d idle=%ld flags=%s db=%d sub=%d psub=%d qbuf=%lu obl=%lu oll=%lu events=%s cmd=%s",
         ip,port,client->fd,
         (long)(now - client->lastinteraction),
         flags,
@@ -976,7 +976,8 @@ sds getClientInfoString(redisClient *client) {
         (unsigned long) sdslen(client->querybuf),
         (unsigned long) client->bufpos,
         (unsigned long) listLength(client->reply),
-        events);
+        events,
+        client->lastcmd ? client->lastcmd->name : "NULL");
 }
 
 void clientCommand(redisClient *c) {

src/redis.c

@@ -1174,7 +1174,7 @@ int processCommand(redisClient *c) {
 
     /* Now lookup the command and check ASAP about trivial error conditions
      * such as wrong arity, bad command name and so forth. */
-    c->cmd = lookupCommand(c->argv[0]->ptr);
+    c->cmd = c->lastcmd = lookupCommand(c->argv[0]->ptr);
     if (!c->cmd) {
         addReplyErrorFormat(c,"unknown command '%s'",
             (char*)c->argv[0]->ptr);

src/redis.h

@@ -294,7 +294,7 @@ typedef struct redisClient {
     sds querybuf;
     int argc;
     robj **argv;
-    struct redisCommand *cmd;
+    struct redisCommand *cmd, *lastcmd;
     int reqtype;
     int multibulklen;       /* number of multi bulk arguments left to read */
     long bulklen;           /* length of bulk argument in multi bulk request */