BuiltinFunctionMap

在core/init/builtins.h中

using BuiltinFunction = std::function<int(const std::vector<std::string>&)>;       
class BuiltinFunctionMap : public KeywordMap<BuiltinFunction> {                    
  public:                                                                          
    BuiltinFunctionMap() {}                                                        
                                                                                   
  private:                                                                         
    const Map& map() const override;                                               
};    

在core/init/builtins.cpp中

const BuiltinFunctionMap::Map& BuiltinFunctionMap::map() const {                   
    constexpr std::size_t kMax = std::numeric_limits<std::size_t>::max();          
    // clang-format off                                                            
    static const Map builtin_functions = {                                         
        {"bootchart",               {1,     1,    do_bootchart}},                  
        {"chmod",                   {2,     2,    do_chmod}},                      
        {"chown",                   {2,     3,    do_chown}},                      
        {"class_reset",             {1,     1,    do_class_reset}},                
        {"class_restart",           {1,     1,    do_class_restart}},              
        {"class_start",             {1,     1,    do_class_start}},                
        {"class_stop",              {1,     1,    do_class_stop}},                 
        {"copy",                    {2,     2,    do_copy}},                                                                                                                                                
        {"domainname",              {1,     1,    do_domainname}}, 
        .......
                {"mount_all",               {1,     kMax, do_mount_all}},               
        {"mount",                   {3,     kMax, do_mount}},                   
        {"umount",                  {1,     1,    do_umount}},                  
        {"restart",                 {1,     1,    do_restart}},                 
........
        {"wait",                    {1,     2,    do_wait}},                    
        {"wait_for_prop",           {2,     2,    do_wait_for_prop}},           
        {"write",                   {2,     2,    do_write}},                                                                                                                                               
    };