in plugin/server_audit/server_audit.cc [2373:2393]
static void update_excl_users(MYSQL_THD thd __attribute__((unused)),
struct SYS_VAR *var __attribute__((unused)),
void *var_ptr __attribute__((unused)), const void *save)
{
const char *new_users= (*(const char * const*)(save)) ? *(const char * const*)(save) : empty_str;
size_t new_len= strlen(new_users) + 1;
mysql_prlock_wrlock(&lock_operations);
mark_always_logged(thd);
if (new_len > sizeof(excl_user_buffer))
new_len= sizeof(excl_user_buffer);
memcpy(excl_user_buffer, new_users, new_len - 1);
excl_user_buffer[new_len - 1]= 0;
excl_users= excl_user_buffer;
user_coll_fill(&excl_user_coll, excl_users, &incl_user_coll, 0);
error_header();
fprintf(stderr, "server_audit_excl_users set to '%s'.\n", excl_users);
mysql_prlock_unlock(&lock_operations);
}