--skip-name-resolve=0 didn't work

custom code in `case OPT_SKIP_RESOLVE`
was overriding the correct value from handle_options().

sql/mysqld.cc

@@ -9484,12 +9484,6 @@ mysqld_get_one_option(int optid, const struct my_option *opt, char *argument)
   case (int) OPT_SKIP_HOST_CACHE:
     opt_specialflag|= SPECIAL_NO_HOST_CACHE;
     break;
-  case (int) OPT_SKIP_RESOLVE:
-    if ((opt_skip_name_resolve= (argument != disabled_my_option)))
-      opt_specialflag|= SPECIAL_NO_RESOLVE;
-    else
-      opt_specialflag&= ~SPECIAL_NO_RESOLVE;
-    break;
   case (int) OPT_WANT_CORE:
     test_flags |= TEST_CORE_ON_SIGNAL;
     break;

sql/mysqld.h

@@ -680,7 +680,6 @@ enum options_mysqld
   OPT_SERVER_ID,
   OPT_SILENT,
   OPT_SKIP_HOST_CACHE,
-  OPT_SKIP_RESOLVE,
   OPT_SLAVE_PARALLEL_MODE,
   OPT_SSL_CA,
   OPT_SSL_CAPATH,

sql/sql_acl.cc

@@ -315,9 +315,9 @@ public:
     update_hostname(&host, safe_strdup_root(mem, host_arg));
   }
 
-  bool check_validity(bool check_no_resolve)
+  bool check_validity()
   {
-    if (check_no_resolve &&
+    if (opt_skip_name_resolve &&
         (hostname_requires_resolving(host.hostname) ||
          hostname_requires_resolving(proxied_host.hostname)))
     {
@@ -1781,7 +1781,6 @@ static bool set_user_plugin (ACL_USER *user, size_t password_len)
 static bool acl_load(THD *thd, const Grant_tables& tables)
 {
   READ_RECORD read_record_info;
-  bool check_no_resolve= specialflag & SPECIAL_NO_RESOLVE;
   char tmp_name[SAFE_NAME_LEN+1];
   int password_length;
   Sql_mode_save old_mode_save(thd);
@@ -1825,7 +1824,7 @@ static bool acl_load(THD *thd, const Grant_tables& tables)
       host.access= host_table.get_access();
       host.access= fix_rights_for_db(host.access);
       host.sort= get_sort(2, host.host.hostname, host.db);
-      if (check_no_resolve && hostname_requires_resolving(host.host.hostname))
+      if (opt_skip_name_resolve && hostname_requires_resolving(host.host.hostname))
       {
         sql_print_warning("'host' entry '%s|%s' "
                         "ignored in --skip-name-resolve mode.",
@@ -1929,7 +1928,7 @@ static bool acl_load(THD *thd, const Grant_tables& tables)
       continue;
     }
 
-    if (!is_role && check_no_resolve &&
+    if (!is_role && opt_skip_name_resolve &&
         hostname_requires_resolving(user.host.hostname))
     {
       sql_print_warning("'user' entry '%s@%s' "
@@ -2105,7 +2104,7 @@ static bool acl_load(THD *thd, const Grant_tables& tables)
       sql_print_warning("Found an entry in the 'db' table with empty database name; Skipped");
       continue;
     }
-    if (check_no_resolve && hostname_requires_resolving(db.host.hostname))
+    if (opt_skip_name_resolve && hostname_requires_resolving(db.host.hostname))
     {
       sql_print_warning("'db' entry '%s %s@%s' "
                         "ignored in --skip-name-resolve mode.",
@@ -2160,7 +2159,7 @@ static bool acl_load(THD *thd, const Grant_tables& tables)
     {
       ACL_PROXY_USER proxy;
       proxy.init(proxies_priv_table, &acl_memroot);
-      if (proxy.check_validity(check_no_resolve))
+      if (proxy.check_validity())
         continue;
       if (push_dynamic(&acl_proxy_users, (uchar*) &proxy))
         DBUG_RETURN(TRUE);
@@ -7348,7 +7347,6 @@ static bool grant_load(THD *thd,
 {
   bool return_val= 1;
   TABLE *t_table, *c_table, *p_table;
-  bool check_no_resolve= specialflag & SPECIAL_NO_RESOLVE;
   MEM_ROOT *save_mem_root= thd->mem_root;
   sql_mode_t old_sql_mode= thd->variables.sql_mode;
   DBUG_ENTER("grant_load");
@@ -7392,7 +7390,7 @@ static bool grant_load(THD *thd,
 	goto end_unlock;
       }
 
-      if (check_no_resolve)
+      if (opt_skip_name_resolve)
       {
 	if (hostname_requires_resolving(mem_check->host.hostname))
 	{
@@ -7437,7 +7435,7 @@ static bool grant_load(THD *thd,
           goto end_unlock_p;
         }
 
-        if (check_no_resolve)
+        if (opt_skip_name_resolve)
         {
           if (hostname_requires_resolving(mem_check->host.hostname))
           {

sql/sql_connect.cc

@@ -887,7 +887,7 @@ int thd_set_peer_addr(THD *thd,
     return 1; /* The error is set by my_strdup(). */
   }
   thd->main_security_ctx.host_or_ip = thd->main_security_ctx.ip;
-  if (!(specialflag & SPECIAL_NO_RESOLVE))
+  if (!opt_skip_name_resolve)
   {
     int rc;
 

sql/sql_parse.cc

@@ -5248,7 +5248,7 @@ mysql_execute_command(THD *thd)
       List_iterator <LEX_USER> user_list(lex->users_list);
       while ((user= user_list++))
       {
-        if (specialflag & SPECIAL_NO_RESOLVE &&
+        if (opt_skip_name_resolve &&
             hostname_requires_resolving(user->host.str))
           push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
                               ER_WARN_HOSTNAME_WONT_WORK,

sql/sys_vars.cc

@@ -2811,7 +2811,7 @@ static Sys_var_mybool Sys_skip_name_resolve(
        "skip_name_resolve",
        "Don't resolve hostnames. All hostnames are IP's or 'localhost'.",
        READ_ONLY GLOBAL_VAR(opt_skip_name_resolve),
-       CMD_LINE(OPT_ARG, OPT_SKIP_RESOLVE),
+       CMD_LINE(OPT_ARG),
        DEFAULT(FALSE));
 
 static Sys_var_mybool Sys_skip_show_database(

sql/unireg.h

@@ -67,7 +67,7 @@
 #define SPECIAL_WAIT_IF_LOCKED	8		/* Wait if locked database */
 #define SPECIAL_SAME_DB_NAME   16		/* form name = file name */
 #define SPECIAL_ENGLISH        32		/* English error messages */
-#define SPECIAL_NO_RESOLVE     64		/* Don't use gethostname */
+#define SPECIAL_NO_RESOLVE     64		/* Obsolete */
 #define SPECIAL_NO_PRIOR	128		/* Obsolete */
 #define SPECIAL_BIG_SELECTS	256		/* Don't use heap tables */
 #define SPECIAL_NO_HOST_CACHE	512		/* Don't cache hosts */