int builtin_exec_from_history(cmd_t* cmd, job_list_t* jobs, history_t* hist) {
int index = (int) strtol(cmd->args[0], NULL, 10);
cmd_t* past_cmd = get_from_history(hist, index);
if (past_cmd) {
cmd_t* new_cmd = copycmd(past_cmd);
printcmd(new_cmd, stdout);
return executecmd(new_cmd, jobs, hist);
}
return COMMAND_NOT_FOUND;
}
void deal(u8 * buf,u8 len)
{
u8 i = 0;
for(int k = 0;k< 256;k++)
cmdBuf[k] = 0;
while(i<len)
{
switch(state)
{
case NEEDHEAD:
if(buf[i] == HEAD)
{
i++;
state = NEEDDOT;
}
else
{
i++;
}
break;
case NEEDDOT:
if(buf[i] == DOT)
{
i++;
state = NEEDPARA;
}
else
{
state = NEEDHEAD;
i++;
}
break;
case NEEDPARA:
if(buf[i] == END)//如果检测到";"则结束，将命令缓冲区数据复制到命令列表
{
i++;
copycmd(&ctr[count],cmdBuf,j);//j是cmdbuf的数据长度
count++;
if(count == MAX)count = 0;
j=0;
state = NEEDHEAD;
}
else if(buf[i] != DOT)//如果不是",",则将字符数据复制到缓冲区
{
if(j<MAX_LENGTH + 2)//最大限制参数22字节
cmdBuf[j] = buf[i];//复制数据
else
{
//错误帧，直接抛弃所有本次接受的内容
state = NEEDHEAD;
i = 0;
j = 0;
count = 0;
return;
}
j++;
i++;
}
else if(buf[i] == DOT)
{
i++;
}
break;
}
}
}
