putty的终端输入数据结构

struct bufchain_granule;
typedef struct bufchain_tag {
    struct bufchain_granule *head, *tail;
    int buffersize;
} bufchain;

#define BUFFER_GRANULE 512

struct bufchain_granule {
    struct bufchain_granule *next;
    int buflen, bufpos;
    char buf[BUFFER_GRANULE];
}