From a7726cdf517eca16dec37655881ddae2688aaaeb Mon Sep 17 00:00:00 2001
From: Binbin <binloveplay1314@qq.com>
Date: Wed, 8 Dec 2021 14:59:02 +0800
Subject: [PATCH] Fix SENTINEL subcommands's arity (#9909)

For `SENTINEL SET`, we can use in these ways:
1. SENTINEL SET mymaster quorum 3
2. SENTINEL SET mymaster quorum 5 parallel-syncs 1

For `SENTINEL SIMULATE-FAILURE`, although it is only used for testing:
1. SENTINEL SIMULATE-FAILURE CRASH-AFTER-ELECTION
2. SENTINEL SIMULATE-FAILURE CRASH-AFTER-ELECTION CRASH-AFTER-PROMOTION
---
 src/sentinel.c | 5 ++---
 src/server.c   | 4 ++--
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/sentinel.c b/src/sentinel.c
index 297f0591f3..e309810395 100644
--- a/src/sentinel.c
+++ b/src/sentinel.c
@@ -3726,9 +3726,9 @@ void sentinelCommand(client *c) {
 "    Reset masters for specific master name matching this pattern.",
 "SENTINELS <master-name>",
 "    Show a list of Sentinel instances for this master and their state.",
-"SET <master-name> <option> <value>",
+"SET <master-name> <option> <value> [<option> <value> ...]",
 "    Set configuration parameters for certain masters.",
-"SIMULATE-FAILURE (CRASH-AFTER-ELECTION|CRASH-AFTER-PROMOTION|HELP)",
+"SIMULATE-FAILURE [CRASH-AFTER-ELECTION] [CRASH-AFTER-PROMOTION] [HELP]",
 "    Simulate a Sentinel crash.",
 NULL
         };
@@ -3943,7 +3943,6 @@ NULL
             addReplyErrorSds(c,e);
         }
     } else if (!strcasecmp(c->argv[1]->ptr,"set")) {
-        if (c->argc <= 3) goto numargserr;
         sentinelSetCommand(c);
     } else if (!strcasecmp(c->argv[1]->ptr,"config")) {
         if (c->argc < 3) goto numargserr;
diff --git a/src/server.c b/src/server.c
index 545222d5a3..1e9ef8a4b6 100644
--- a/src/server.c
+++ b/src/server.c
@@ -693,10 +693,10 @@ struct redisCommand sentinelSubcommands[] = {
     {"sentinels",sentinelCommand,3,
      "admin only-sentinel"},
 
-    {"set",sentinelCommand,-3,
+    {"set",sentinelCommand,-5,
      "admin only-sentinel"},
 
-    {"simulate-failure",sentinelCommand,3,
+    {"simulate-failure",sentinelCommand,-3,
      "admin only-sentinel"},
 
     {"help",sentinelCommand,2,