Linux项目一

Linux项目一

引言：

　　这是我去年做的东西，一直没有时间整理，今天又要做一个基于这个项目的客户端与服务器版本。

　　以前我写的库文件中的函数耦合度很大，在一个函数中调用另一个函数，导致一无法拆开使用！

　　因此，我对以前写的库进行接口的更改，以更好的适应更多的项目。

　　当然我也把以前写的小程序贴出来，以供大家参考！

需求：

　　1.搜索bmp图片转换成黑白图片复制到另一个文件中

　　2.系统为Linux

自定义功能函数：

　　1.打印目录：

 #include<unistd.h>
 #include<stdio.h>
 #include<dirent.h>
 #include<string.h>
 #include<sys/stat.h>
 #include<stdlib.h>
 void printdir(char *dir,int depth)/*打印目录*/
 {
     DIR *dp;
     struct dirent *entry;
     struct stat statbuf;

     if((dp=opendir(dir))==NULL)
     {
         fprintf(stderr,"cannot open directory:%s\n",dir);
         return;
     }
     chdir(dir);
     while((entry=readdir(dp))!=NULL)
     {
         lstat(entry->d_name,&statbuf);/**获取文件信息，保存在statbuf**/
         if(S_ISDIR(statbuf.st_mode))/***判断是否为目录***/
         {
             if(strcmp(".",entry->d_name)==||strcmp("..",entry->d_name)==)
                 continue;
             printf("%*s%s/\n",depth," ",entry->d_name);
             printdir(entry->d_name,depth+);
         }
         else
              printf("%*s%s/\n",depth," ",entry->d_name);/***为文件***/
     }
     chdir("..");
     closedir(dp);
 }

　　2.删除文件：

 #include<unistd.h>
 void del_file(const char *filename)
 {
     unlink(filename);
     return ;
 }

　　3.复制文件：

#include<unistd.h>
void lkbmp(const char *source,const char *target)
{
    if(link(source,target)==)
      printf(" link is successful\n");
    else
    printf(" link is error\n");
}

　　4.对彩色图片转换成黑白图片

#include<stdio.h>
#include<string.h>
int bmp(char filename[])
{
    FILE *fo,*fin;
    RGN rgb,black={,,,},white={,,,};
    char name[]="\0";
    unsigned char temp[]="\0";
    unsigned int offset=;
    /***在文件名中添加copy_来区别原文件***/
    int len=strlen(filename);
    strncpy(name,filename,len-);
    strcat(name,"_copy.bmp");

    if((fo=fopen(filename,"rb+"))==NULL)
        printf("can not open %s",filename);
    if((fin=fopen(name,"wb+"))==NULL)
        printf("can not open %s",name);
    fseek(fo,,);
    fread(&offset,,,fo);
    printf("%X\n",offset);
    fseek(fo,,);
    unsigned int i=;
    while(i<=offset)
    {
        fread(temp,,,fo);
        fwrite(temp,,,fin);
        i+=;
    }
    while(!feof(fo))
    {
        fread(&rgb,,,fo);
        if((rgb.Blue+rgb.Green+rgb.Red)/<)
            fwrite(&black,,,fin);
        else
            fwrite(&white,,,fin);
    }

    fclose(fo);
    fclose(fin);
    return ;
}

完整自定义库文件：

 #include<unistd.h>
 #include<stdio.h>
 #include<dirent.h>
 #include<string.h>
 #include<stdlib.h>
 #include<sys/stat.h>
 #include<sys/types.h>
 #include<sys/wait.h>
 #include<stdlib.h>
 #include<time.h>
 #include <sys/msg.h>
 FILE *fp,*fbmp,*flog;
 struct dirent *entry;
 struct stat statbuf;
 unsigned short  BMP=0x4D42,
             JPG=0xD8FF,
         PNG[]={0x5089,0x474E,0x0A0D,0x0A1A},
         GIF[]={0x4947,0x3846,0x6139};
 static char path1[],path2[],watchdog[],name[];
 struct tm *tm_ptr;
 time_t the_time;

 //判断图片头文件的结构体
 typedef struct tagRGBQUAD
 {
 unsigned char Blue;// À¶É«µÄÁÁ¶È£šÖµ·¶Î§Îª0-255)
 unsigned char Green; // ÂÌÉ«µÄÁÁ¶È£šÖµ·¶Î§Îª0-255)
 unsigned char Red; // ºìÉ«µÄÁÁ¶È£šÖµ·¶Î§Îª0-255)
 unsigned char Reserved;// ±£Áô£¬±ØÐëΪ0
 } RGN;

 void init()/*用于初始化程序*/
 {
     printf("file opened now\n");
     fp=fopen("wrg.text","w+");
     flog=fopen("wrlog.text","w+");
     fbmp=fopen("bmpname.text","w+");
 }
 void Exit()
 {
     printf("everything is gone\n");
     fclose(fp);
     fclose(fbmp);
     fclose(flog);
 }
 int istupian(char entry[])
 /*返加值为
 1 bmp;
 2 jpg;
 3 png;
 4 gif;
 */
 {
     FILE *fis;
     short int i=;
     unsigned short pis[];
     int flag=;//每次调用都进行初始化
     if((fis=fopen(entry,"r"))==NULL)
         printf("can not read %s\n",entry);
     fread(pis,,,fis);

     if(pis[]==BMP)
     {
         flag=;
         printf("it is a bmp\n");
     }
     else if(pis[]==JPG)
     {
         flag=;
         printf("it is a jpg\n");
     }
     else if(PNG[]==pis[]&&PNG[]==pis[]&&PNG[]==pis[]&&PNG[]==pis[])
     {
         flag=;
         printf("it is a png\n");
     }
     else if(GIF[]==pis[]&&GIF[]==pis[]&&GIF[]==pis[])
     {
         flag=;
         printf("it is a gif\n");
     }
     return flag;

 }
 void wrtlog()/*将文件的路径写入路径中*/
 {
     printf("write to wrtlg\n");
     fprintf(fp,"%s/%s\n",getcwd(NULL,),entry->d_name);
     fprintf(fbmp,"%s\n",entry->d_name);
 }
 void wrlog(char name[])//  将日记写入文件中
 {
   static int i=;
   (void)time(&the_time);
   //tm_ptr=gmtime(&the_time);
   if(i==) fprintf(flog,"文件名                    /状态            ／时间            ／\n");
   ++i;
   fprintf(flog,"%s\t\t删除\t\t ",name);

   fprintf(flog,"%s\n",ctime(&the_time));
   //fprintf(flog,"%02d:%02d:%02d:%02d:%02d:%02d\n",tm_ptr->tm_year,tm_ptr->tm_mon+1,tm_ptr->tm_mday,tm_ptr->tm_hour,tm_ptr->tm_min,tm_ptr->tm_sec);
 }
 void printdir(char dir[])/*打印目录*/
 {
     DIR *dp;
         printf("printdir ******doing now\n");
     if((dp=opendir(dir))==NULL)
     {
         fprintf(stderr,"cannot open directory:%s\n",dir);
         return;
     }
     chdir(dir);
     while((entry=readdir(dp))!=NULL)
     {
         lstat(entry->d_name,&statbuf);
         if(S_ISDIR(statbuf.st_mode))
         {
             if(strcmp(".",entry->d_name)==||strcmp("..",entry->d_name)==)
                 continue;
             printdir(entry->d_name);
         }
         else
             wrtlog();
     }
     chdir("..");
     closedir(dp);
 }
 int bmp(char filename[])
 {
     FILE *fo,*fin;
     RGN rgb,black={,,,},white={,,,};
     char name[]="\0";
     unsigned char temp[]="\0";
     unsigned int offset=;
     /***在文件名中添加copy_来区别原文件***/
     int len=strlen(filename);
     strncpy(name,filename,len-);
     strcat(name,"_copy.bmp");

     if((fo=fopen(filename,"rb+"))==NULL)
         printf("can not open %s",filename);
     if((fin=fopen(name,"wb+"))==NULL)
         printf("can not open %s",name);
     fseek(fo,,);
     fread(&offset,,,fo);
     printf("%X\n",offset);
     fseek(fo,,);
     unsigned int i=;
     while(i<=offset)
     {
         fread(temp,,,fo);
         fwrite(temp,,,fin);
         i+=;
     }
     while(!feof(fo))
     {
         fread(&rgb,,,fo);
         if((rgb.Blue+rgb.Green+rgb.Red)/<)
             fwrite(&black,,,fin);
         else
             fwrite(&white,,,fin);
     }

     fclose(fo);
     fclose(fin);
     return ;
 }
 //硬连接
 /*返加值为
 1 bmp;
 2 jpg;
 3 png;
 4 gif;
 */
 void lkbmp()
 {
   fseek(fp,,);
   fseek(fbmp,,);
   while(fscanf(fp,"%s",path1)!=EOF&&fscanf(fbmp,"%s",name)!=EOF)
   {
     /***path2 的路径已经初始化，将文件名接到path2中，链接好后，将watchsog重新载入watchdog中***/
     strcat(path2,name);
     printf("%s",path2);
     if(link(path1,path2)==)
     {
       printf(" link is successful\n");
     }
       else
     printf(" link is error\n");
       //恢复母路径
       if(istupian(path2)==)
     bmp(path2);
       strcpy(path2,watchdog);
   }

 }
 //删除非图片文件
 int del_dir()
 {
   fseek(fp,,);
   fseek(fbmp,,);
   while(fscanf(fbmp,"%s",name)!=EOF)
   {
     //path2 的路径已经初始化，将文件名接到path2中，链接好后，将watchsog重新载入watchdog中
     strcat(path2,name);
     if(!istupian(path2)&&unlink(path2)==)
       {unlink(path2);
         printf("unlink %s is successful\n",path2);
         wrlog(path2);
       }
     else
       printf("unlink %s is error\n",path2);
           //恢复母路径
     strcpy(path2,watchdog);
   }
   return ;

 }

对应的执行文件：

 #include"myhead.h"
 #pragma pack(2)
 int main(int argc,char *argv[])
 {
     char topdir[] = ".";
         if(argc>=)
         strcpy(topdir,argv[]);
         printf("已经得到目录：\"%s\"\n",topdir);
         printf("初始化中");
         init();
         printf("初始化完毕\n");
         printf("start printdir\n");
         printf("进入原始路径,得到母路径。");
         chdir(topdir);
         chdir("..");
         strcpy(path2,getcwd(NULL,));
             //创建D目录,可以以作为子进程
           strcat(path2,"/D/");
           mkdir(path2,);
           printf("母路径:%s\n",path2);
           strcpy(watchdog,path2);
     pid_t fork_res;
     fork_res=fork();
       if(fork_res==)
       {
           printf("Child now\n");
         while(del_dir()!=);
         printf("del_dir done.\n");
           return ;
       }
       else if(fork_res>)
       {
           printdir(topdir);
           printf("printdir done.\n");
           lkbmp();
           printf("lkbmp done\n");
           del_dir();
       return  ;
       }
       else
       { perror("fork failed");
           exit();
       }

     printf("程序运行结束");
     exit();
 }