linux参数的配置，文件的读写

把相关参数进行配置时，很多需要写到文件里面保存

下面是一个代码，保存之。

 

#include <stdio.h>
#include <stdlib.h>

#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

//灯数据结构体
struct _Lamp_Info
{
 int number;
 int color;
 int size;
};
typedef struct _Lamp_Info Lamp_Info;

 //灯数据节点
struct LampNode
{
 Lamp_Info lamp_info;
 struct LampNode *next;
};

//数据存储列表
struct ListData
{
 int ListNumber;
 struct LampNode *head;
 struct LampNode *tail;
};

//数据存储列表定义
struct ListData List_Data_Table;

//数据存储列表初始化
int initListData()
{
 List_Data_Table.ListNumber = 0;
 List_Data_Table.head = NULL;
 List_Data_Table.tail = NULL;
 return 0;
}

//添加数据
int Add_List_info(struct LampNode *pLampNode)
{
 if( pLampNode == NULL )
 {
  return -1;
 }

 if( List_Data_Table.head == NULL )
 {
  List_Data_Table.head = pLampNode;
  List_Data_Table.tail = pLampNode;
  pLampNode->next = NULL;
  List_Data_Table.ListNumber++;
 }
 else
 {
  pLampNode->next = NULL;
  List_Data_Table.tail->next = pLampNode;
  List_Data_Table.tail = List_Data_Table.tail->next;
  List_Data_Table.ListNumber++;
 }
 return 1;
}

//写入数据*****************************take care
int Save_Data_ToDisk(char *save_file_name)
{
 int fd = 0;
 int res= 0;

 struct LampNode *p_tempNode = NULL;

 fd = open(save_file_name, O_CREAT|O_RDWR);
    if(fd < 0)
    {
  printf("Lamp.dat failed !\n");
  return -1;
    }
 for( p_tempNode=List_Data_Table.head; p_tempNode!=NULL; p_tempNode=p_tempNode->next)
 {
  res = write(fd, &p_tempNode->lamp_info, sizeof(Lamp_Info));
  if(res<0)
  {
   return -1;
  } 
 } 
}
//读出数据*************************
int Read_Data_FromDisk(char *read_file_name)
{
 int fd = 0;
 int res = 0;

 Lamp_Info temp_lamp_info;
 struct LampNode * p_tempNode = NULL;
 
    fd = open(read_file_name,O_RDWR);
    if(fd < 0)
    {
         printf("open Lamp.dat failed !\n");
   return -1;
    }

 while(1)
 {
  memset((unsigned char*)&temp_lamp_info,0,sizeof(Lamp_Info));
  res = read(fd, (unsigned char *)&temp_lamp_info, sizeof(Lamp_Info));
  if( res < sizeof(Lamp_Info))
  {
   break;
  }
  p_tempNode = malloc(sizeof(struct LampNode));
  memcpy((unsigned char *)&p_tempNode, (unsigned char *)&temp_lamp_info,sizeof(Lamp_Info));
  //Add_List_info(p_tempNode);
  printf("%d\n",temp_lamp_info.number);
 }
}
//节点创造,准备添加
int CreateNode(Lamp_Info *plamp_info)
{
 struct LampNode *tempNode = NULL;
 tempNode = malloc(sizeof(struct LampNode));
 memcpy((unsigned char*)&tempNode, (unsigned char*)&plamp_info, sizeof(Lamp_Info));
 tempNode->next = NULL;

 Add_List_info(tempNode);
}
//lamp数据获得，get_lamp_info
Lamp_Info get_lamp_info(int number, int color, int size)
{
 Lamp_Info temp_lamp_info;printf("aaaaaa1\n");
 memset((unsigned char*)&temp_lamp_info,0,sizeof(Lamp_Info));printf("aaaaaa2\n");
 temp_lamp_info.number = number;printf("aaaaaa3\n");
 temp_lamp_info.color  = color;printf("aaaaaa4\n");
 temp_lamp_info.size   = size;printf("aaaaaa5\n");

 return temp_lamp_info;
}

int main()
{
 char save_name_org[] ="./Lamp.dat";
 Lamp_Info temp_lamp_info = get_lamp_info(1,1,1);
printf("%d,%d,%d\n",temp_lamp_info.number,temp_lamp_info.color,temp_lamp_info.size);
CreateNode(&temp_lamp_info);printf("aaaaaa\n");
//CreateNode(get_lamp_info(2,2,2));
//CreateNode(get_lamp_info(3,3,3));
Save_Data_ToDisk(save_name_org);
Read_Data_FromDisk(save_name_org);

}