MDEV-27789 mysql_upgrade / mariadb-upgrade in 10.6.6 is putting passw…

…ord in host argument

Removed all dependencies of command line arguments based on positions in
an array (this kind of code should never have been written).
Instead use option names, which are stable.

Reviewer: Sergei Golubchik

client/mysql_upgrade.c

@@ -121,7 +121,6 @@ static struct my_option my_long_options[]=
    &opt_not_used, &opt_not_used, 0 , GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
   {"host", 'h', "Connect to host.", 0,
    0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
-#define PASSWORD_OPT 12
   {"password", 'p',
    "Password to use when connecting to server. If password is not given,"
    " it's solicited on the tty.", &opt_password,&opt_password,
@@ -158,7 +157,6 @@ static struct my_option my_long_options[]=
   {"upgrade-system-tables", 's', "Only upgrade the system tables in the mysql database. Tables in other databases are not checked or touched.",
    &opt_systables_only, &opt_systables_only, 0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
-#define USER_OPT (array_elements(my_long_options) - 6)
   {"user", 'u', "User for login.", &opt_user,
    &opt_user, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"verbose", 'v', "Display more output about the process; Using it twice will print connection argument; Using it 3 times will print out all CHECK, RENAME and ALTER TABLE during the check phase.",
@@ -264,11 +262,11 @@ static void print_error(const char *error_msg, DYNAMIC_STRING *output)
 */
 
 static void add_one_option_cmd_line(DYNAMIC_STRING *ds,
-                                    const struct my_option *opt,
-                                    const char* arg)
+                                    const char *name,
+                                    const char *arg)
 {
   dynstr_append(ds, "--");
-  dynstr_append(ds, opt->name);
+  dynstr_append(ds, name);
   if (arg)
   {
     dynstr_append(ds, "=");
@@ -278,10 +276,10 @@ static void add_one_option_cmd_line(DYNAMIC_STRING *ds,
 }
 
 static void add_one_option_cnf_file(DYNAMIC_STRING *ds,
-                                    const struct my_option *opt,
-                                    const char* arg)
+                                    const char *name,
+                                    const char *arg)
 {
-  dynstr_append(ds, opt->name);
+  dynstr_append(ds, name);
   if (arg)
   {
     dynstr_append(ds, "=");
@@ -324,7 +322,7 @@ get_one_option(int optid, const struct my_option *opt,
     if (argument)
     {
       /* Add password to ds_args before overwriting the arg with x's */
-      add_one_option_cnf_file(&ds_args, opt, argument);
+      add_one_option_cnf_file(&ds_args, opt->name, argument);
       while (*argument)
         *argument++= 'x';                       /* Destroy argument */
       tty_password= 0;
@@ -383,7 +381,7 @@ get_one_option(int optid, const struct my_option *opt,
   case OPT_SHARED_MEMORY_BASE_NAME: /* --shared-memory-base-name */
   case OPT_PLUGIN_DIR:                          /* --plugin-dir */
   case OPT_DEFAULT_AUTH:                        /* --default-auth */
-    add_one_option_cmd_line(&conn_args, opt, argument);
+    add_one_option_cmd_line(&conn_args, opt->name, argument);
     break;
   }
 
@@ -394,7 +392,7 @@ get_one_option(int optid, const struct my_option *opt,
       it can be passed on to "mysql" and "mysqlcheck"
       Save it in the ds_args string
     */
-    add_one_option_cnf_file(&ds_args, opt, argument);
+    add_one_option_cnf_file(&ds_args, opt->name, argument);
   }
   return 0;
 }
@@ -1349,12 +1347,10 @@ int main(int argc, char **argv)
   {
     opt_password= get_tty_password(NullS);
     /* add password to defaults file */
-    add_one_option_cnf_file(&ds_args, &my_long_options[PASSWORD_OPT], opt_password);
-    DBUG_ASSERT(strcmp(my_long_options[PASSWORD_OPT].name, "password") == 0);
+    add_one_option_cnf_file(&ds_args, "password", opt_password);
   }
   /* add user to defaults file */
-  add_one_option_cnf_file(&ds_args, &my_long_options[USER_OPT], opt_user);
-  DBUG_ASSERT(strcmp(my_long_options[USER_OPT].name, "user") == 0);
+  add_one_option_cnf_file(&ds_args, "user", opt_user);
 
   cnf_file_path= strmov(defaults_file, "--defaults-file=");
   {