C语言 结构体数组保存到二进制文件中

在项目中我定义了一个结构体数组，头文件如下：

C/C++ code
 
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#ifndef MY_TABLE_STRUCT_H
#define  MY_TABLE_STRUCT_H
 
#define  POLICY_UTIL_ARRAY_LENGTH   256*64
 
#define     ARRAY_SIZE 256
 
long saved_policy_id[10];
long saved_udp_allow_IP_ID[10];
long save_log_ID[10];
 
 
/*与日志审计相关的文件路径定义*/
 
#define SYSTEM_LOG   "/tmp/log/system.log"
#define HTTP_LOG   "/tmp/log/http.log"
#define SMTP_LOG   "/tmp/log/smtp.log"
#define POP3_LOG   "/tmp/log/pop3.log"
 
#define SYSTEM_INTERMEDIARY_LOG   "/tmp/log/system_intermediary.log"
#define HTTP_INTERMEDIARY_LOG  "/tmp/log/http_intermediary.log"
#define SMTP_INTERMEDIARY_LOG  "/tmp/log/smtp_intermediary.log"
#define POP3_INTERMEDIARY_LOG  "/tmp/log/pop3_intermediary.log"
 
 
typedef struct{
    int used; //0 for unused
    int AppID; 
    /*
           00 "系统",
           01 "HTTP应用",
        02 "SMTP应用",
        03 "POP3应用",
        04 "FTP应用",
        05 "TELNET应用",
        06 "NULL ",
        07 "用户自定义应用",
        08 "TCP空白协议",
        09 "UDP应用",
        0a "ORACLE数据库应用",
        0b "SQL Server 数据库应用",
        0c "邮件服务器与邮件服务器应用",
    */
    char SourceIP[20];
    short SourcePort;
    char DestIP[20];
    short DestPort;
    char SourceType; //I for inner;O for outter
    char IsDestProxyMode;
    short MaxConn;
    char IsWorking; 
            // 'Y' for "自动启用,现启用"
            //'N' for "自动启用,现停用"
            //'U' for "手动启用,现停用"
            //'W' for "手动启用,现启用"
       char IsAuth;
        // 0 for no auth
        // 1  for auth
    char name[20];
         
    UINT16 InnerPort; //for udp
    UINT16 OuterPort;
     
    char IsAllowed; //安全策略黑白指示
                  // 'Y' for 白
                  // 'N' for 黑
        char FromTime[8][8];
     char ToTime[8][8];
     char WeekDay[8][8];
 
 
     //for udp allowed ip
     unsigned int inner_udp_ip[256];
     unsigned int outer_udp_ip[256];
 
     //for tcp allowed ip
     struct IP {
      char ip[255];
      int    black_white;
         } allowed_ip[256];
       
     struct POLICY {
        long p_id;
         short type;
        char IsWorking;
        char p_content[255];
        char IsAllowed;
         } policy[64];     
}TABLE_CHANNEL;
 
TABLE_CHANNEL table_channels[ARRAY_SIZE];
 
#endif


将结构体数组中的数据保存到文件中，实现函数如下:

C/C++ code
 
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void chn_write_file()
{
      FILE *fp;
    int i;
 
    DO_LOG("chn_write_file():write to the file start...\n");
     
    fp=fopen("/tmp/data/db_file/tcp_file","wb");
    if(fp==NULL)
    {
        printf("file /tmp/udp_chn open error\n");
        return;
    }
    //for(i=0;i<256;i++)
        //fwrite(&table_channels[i],sizeof(TABLE_CHANNEL),1,fp);//把内存中的信息写入到文件中去
         
    fwrite(table_channels, sizeof(TABLE_CHANNEL), 256, fp);
     
    fclose(fp);
     
    DO_LOG("chn_write_file():write to the file end...\n");
}



从文件中读取数据存储到结构体数组中，实现函数如下：

C/C++ code
 
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void chn_read_file()
{
    MY_DEBUG_LOG("chn_read_file():read from the file start...\n");
    DO_LOG("chn_read_file():read from the file start...\n");
     
    FILE *fp;
    int i, j;
     
    fp= fopen("/tmp/data/db_file/tcp_file", "rb");
 
    if(fp == NULL)
    {
        DO_LOG("chn_read_file():open file failed, because:%s!\n", strerror(errno));
 
        return ;
    }
     
    /*for(i = 0; i< 256; i++)
    {
        fread(&table_channels[i], sizeof(TABLE_CHANNEL), 1, fp);
    }*/
 
    fread(table_channels, sizeof(TABLE_CHANNEL), 256, fp);
        /*****打印结构体数组中的数据*******/
    MY_DEBUG_LOG("chn_read_file(): The informations of approuteways bellows:\n");
     
       for(i =0; i<256; i++)
    {
        if(table_channels[i].used == 0)
         {
            continue;
        }
         
        MY_DEBUG_LOG("[ReadFile]:ID:%d, used:%d, AppID:%d, SourceIP:%s, SourcePort:%d,\
            DestIP:%s, DestPort:%d, SourceType:%c, IsDestProxyMode:%c, MaxConn:%d,\
            IsWorking:%c, IsAuth:%c, InnerPort:%d, OuterPort:%d, IsAllowed:%c, name:%s!\n", \
            i, table_channels[i].used, table_channels[i].AppID,table_channels[i].SourceIP,table_channels[i].SourcePort, \
            table_channels[i].DestIP, table_channels[i].DestPort,  table_channels[i].SourceType, table_channels[i].IsDestProxyMode,\
            table_channels[i].MaxConn,  table_channels[i].IsWorking,table_channels[i].IsAuth,table_channels[i].InnerPort,\
            table_channels[i].OuterPort,table_channels[i].IsAllowed,table_channels[i].name);
    }
 
    MY_DEBUG_LOG("chn_read_file(): The informations of allowd time bellows:\n");
     
     for(i=0; i<256; i++)
     {
 
        if(table_channels[i].used == 0)
         {
            continue;
        }
 
        for(j=0; j<8; j++)
        {   
            if(table_channels[i].FromTime[j][0] == 0)
            {   
                continue;
            }
             
            if(table_channels[i].ToTime[j][0] == 0)
            {   
                continue;
            }
             
            if(table_channels[i].WeekDay[j][0] == 0)
            {   
                continue;
            }
 
             
            MY_DEBUG_LOG("chn_read_file():ID:%d,FormTime:%s,ToTime:%s,WeekDay:%s\n",\
                i,&table_channels[i].FromTime[j][0], &table_channels[i].ToTime[j][0], &table_channels[i].WeekDay[j][0]);
        }
         
     }
 
     MY_DEBUG_LOG("chn_read_file(): The informations of allowd IPs bellows:\n");
 
     for(i=0; i<256; i++)
     {
 
        if(table_channels[i].used == 0)
         {
            continue;
        }
 
        for(j=0; j<256; j++)
        {
            if(table_channels[i].allowed_ip[j].ip[0] ==0)
            {
                continue;
            }
 
 
            if(table_channels[i].allowed_ip[j].black_white == 0)
            {
                MY_DEBUG_LOG("chn_read_file():ID:%d, ip %s, black_white:%d\n", 
                    i, table_channels[i].allowed_ip[j].ip, table_channels[i].allowed_ip[j].black_white);
            }
        }
 
          
     }
 
 
       MY_DEBUG_LOG("chn_read_file(): The informations of allowd users bellows:\n");
    for(i=0; i<256; i++)
     {
 
        if(table_channels[i].used == 0)
         {
            continue;
        }
 
        for(j=0; j<256; j++)
        {
            if(table_channels[i].allowed_ip[j].ip[0] ==0)
            {
                continue;
            }
 
 
            if(table_channels[i].allowed_ip[j].black_white == 1)
            {
                MY_DEBUG_LOG("chn_read_file():ID:%d, users %s, black_white:%d\n", 
                    i, table_channels[i].allowed_ip[j].ip, table_channels[i].allowed_ip[j].black_white);
            }
        }
 
          
     }
         
    MY_DEBUG_LOG("chn_read_file(): The informations of policies bellows:\n");
     
    for(i=0; i<256; i++)
     {
         if(table_channels[i].used == 0)
         {
                continue;
        }
 
        for(j =0 ; j <64; j++)
        {
            if(table_channels[i].policy[j].type == 0)
            {   
                continue;
            }
 
            MY_DEBUG_LOG("[ReadFile]:ID:%d, AppID:%d, used:%d, policy_id:%d , type:%x,  IsWorking:%c,  p_content:%s, IsAllowed:%c.\n", 
                i,table_channels[i].AppID,table_channels[i].used,table_channels[i].policy[j].p_id,table_channels[i].policy[j].type,
                table_channels[i].policy[j].IsWorking,table_channels[i].policy[j].p_content, table_channels[i].policy[j].IsAllowed);
        }
     }
 
     
    fclose(fp);
 
    MY_DEBUG_LOG("chn_read_file():read from the file start end...\n");
     
}



现在出现问题，请教网上各位高手：
在一个程序中可以正确执行上面的两个操作，并用日志的形式打印数据，是正确的；可是在其它地方调用void chn_read_file()函数时候，并用日志形式打印数据，却显示的是错误的数据（具体错误：allowed_ip结构体，和policy结构体中的数据是错误的，随机生成的，也就是没从文件中正确读出来）函数我用的一样，为什么会出现这种情况？

posted on 2014-06-19 13:50  知识天地  阅读(6399)  评论(0)  编辑  收藏  举报
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