C

int  read_stdin = 1;//初始化从标准输入端输入
int  read_file = 0;

 

typedef enum {
 HPI_SHELL_OK = 0,
 HPI_SHELL_CMD_ERROR = -1,
 HPI_SHELL_PARM_ERROR = -2,
 HPI_SHELL_SYNTAX_ERROR = -3
} ret_code_t;