【C++】基于linux文件管理和C＋＋的I/O框架，实现命令行下的文件管理器

浅浅的花香味﹌ 2023-10-17 15:10 2阅读 0赞

#### 一、实验项目内容 ####

1、实现文件夹创建、删除、进入。  
2、实现当前文件夹下的内容罗列。  
3、实现文件拷贝和文件夹拷贝（文件夹拷贝指深度拷贝，包括所有子目录和文件）。

#### 二、实验过程或算法 ####

**DocumentManger.h**

#ifndef CIRCLE_H
    #define CIRCLE_H
    
    #include<stdlib.h>
    #include <stdio.h>
    #include <errno.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <unistd.h>
    #include <dirent.h>
    #include <string.h>
    #include<sstream>
    #include<iostream>
    #include <dirent.h>
    #include <fstream>
    using namespace std;
    
    class DocumentManager {                         //DocumentManger 文件管理类
    
    private:
        char *path;
        char *newpath;
    public:
        DocumentManager();                         //构造函数1
        DocumentManager( char *path);              //构造函数2
    
        void setNewpath( char* newpath);
        void setPath( char* path);
        void displayTips();                            //命令提示行
    
        int make_dir(const char *path, mode_t mode);   //创建文件夹
        int change_dir(const char *path);              //改变路径
        int remove_dir(const char* path);              //移除文件夹
        int get_file_size_time(const char *filename);  //获取文件的信息
        DIR * open_dir(const char *path);              //打开文件夹
        void read_dir(const char *path, bool ListAllFiles);    //读取文件夹
        int copy_dir(const char *filename, const char *newfilename);   //拷贝文件夹
    
    };
    
    #endif

**DocumentManager.cpp**

#include "DocumentManager.h"
    
    DocumentManager::DocumentManager() {
        this->path = NULL;
    }
    DocumentManager::DocumentManager(char *path) {
        this->path = path;
    }
    
    
    void DocumentManager::setNewpath(char* newpath) {
        this->newpath = newpath;
    }
    
    void DocumentManager::setPath(char* path) {           //store this current path
        this->path = path;
    }
    
    void DocumentManager::displayTips() {                 //display these tips
        cout << "please input commands as the following: " << endl;
        cout << "0.mkdir [path]" << endl;
        cout << "1.chdir [path]" << endl;
        cout << "2.rmdir [path]" << endl;
        cout << "3.opendir [path]" << endl;
        cout << "4.readdir [path]" << endl;
        cout << "5.lldir [path]" << endl;
        cout << "5.copy [path] [newPath]" << endl;
        cout << "7.exit" << endl;
    }
    
    int DocumentManager::make_dir(const char *path, mode_t mode){
        if (mkdir(path,mode) != 0) {                       //make dir with mode
            cerr << "make dir fail" << endl;
        } else {
            cout << "make dir success" << endl;
        }
        return 0;
    }
    int DocumentManager::get_file_size_time(const char *filename)
    {
        struct stat statbuf;                               //get the informations of file
        if (stat(filename, &statbuf) == -1) {
            cerr << "Get stat on" << filename << "  Error: " << endl;
            cerr << strerror(errno) << endl;
        }
        if (S_ISDIR(statbuf.st_mode)) {
        }
        if (S_ISREG(statbuf.st_mode)) {
            cout << filename << " size:" << statbuf.st_size << " bytes"
                    << " modified at " << ctime(&statbuf.st_mtime) << endl;
        }
    
        return 0;
    
    }
    int DocumentManager::change_dir(const char *path ){   //change the dir
        this->path=(char*)path;
    
        if (chdir(path) != 0) {
            cout << "change dir fail" << endl;
        } else {
            cout << "change dir success" << endl;
        }
        return 0;
    }
    
    int DocumentManager::remove_dir(const char* path){    //remove dir
        DIR *dirp=opendir(path);
        if(dirp==NULL){                                   //打开文件夹失败
            perror(path);                                 //输出错误的原因
            return 0;
        }
        struct dirent *entry;
        int ret;
        while (1) {
            entry = readdir(dirp);
            if (entry == NULL) {                          //若父目录为空，直接退出循环
                break;
            }
            if(strcmp(".",entry->d_name)==0||strcmp("..",entry->d_name)==0){
                continue;
            }
            char buf[80];
            snprintf(buf,80,"%s/%s",path,entry->d_name);  //重构子目录
            ret=remove(buf);                              //delete these files
            if(ret==-1){
                if(errno==ENOTEMPTY){                     //删除失败
                    remove_dir(buf);
                    continue;
                }
                perror(buf);                              //输出失败的原因
                return 0;
            }
    
        }
    
        closedir(dirp);
        ret=rmdir(path);                                  //delete the empty dir
        if(ret==-1){
            perror(path);
        }
        else{
            cout<<"remove dir success!"<<endl;
        }
        return 0;
    }
    
    DIR * DocumentManager::open_dir(const char *path) {
        DIR *dirp=opendir(path);                          //open the dir
        if (dirp!= NULL) {
            cout << "open dir success" << endl;
        }
        else{
            cerr<<"Open Directory"<<path<<"  Error: "<<endl;
            cerr<<strerror(errno)<<endl;
        }
        closedir(dirp);                                    //closedir
        return dirp;
    }
    
    void DocumentManager::read_dir(const char *path,bool JustListFileName)
    {
        DIR *dirp=opendir(path);
        struct dirent *direntp;
        static char dot[] = ".", dotdot[] = "..";
        char buf[80];
        while ((direntp = readdir(dirp)) != NULL) {
            if (strcmp(direntp->d_name, dot) && strcmp(direntp->d_name, dotdot)) {
                if (JustListFileName) {                  //just read the filename
                    cout << direntp->d_name << endl;
                } else {
                    sprintf(buf, "%s/%s", path, direntp->d_name);
                    if (get_file_size_time(buf) == -1)          //get the information
                        break;
                }
            }
        }
        closedir(dirp);                                 //closedir
    }
    
    
    
    int DocumentManager::copy_dir(const char *filename, const char *newfilename) {
        struct stat cur_file;
        stat(filename, &cur_file);
    
        if (S_ISDIR(cur_file.st_mode)) {               //路径是文件夹
            DIR *cur_dir;
            dirent *cur_ent;
            int errnum = 0;
    
            if ((cur_dir = opendir(filename)) == NULL){
                return 1;
            }
            if (access(newfilename, F_OK)){          //文件夹不存在，创建这个目标文件夹
                errnum |= mkdir(newfilename, S_IRWXU);
            }
            while ((cur_ent = readdir(cur_dir)) != NULL)    //递归，复制子目录
                if (strcmp(cur_ent->d_name, ".") && strcmp(cur_ent->d_name, "..")) {
                    errnum |= copy_dir(((string)filename + "/" + cur_ent->d_name).c_str(),
                            ((string)newfilename + "/" + cur_ent->d_name).c_str());
                }
            closedir(cur_dir);                       //close dir
            return errnum;
        } else {                                    //路径是文件名
            if (filename == newfilename){           //若两个路径相同则视为无效，退出
                return 0;
            }
            fstream fsin, fsout;                   //拷贝文件
            fsin.open(filename,ios::in | ios::binary);
            fsout.open(newfilename, ios::out |ios::binary);
            fsout << fsin.rdbuf();
            return 1;
        }
    }

**DocumenManger的测试类：**

#include "DocumentManager.h"
    #include<stdlib.h>
    #include <stdio.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <unistd.h>
    #include <dirent.h>
    #include <errno.h>
    #include <string.h>
    #include<sstream>
    #include<iostream>
    #include <dirent.h>
    #include <fstream>
    using namespace std;
    
    int main(){
    
        DocumentManager documentmanger;              //declare a DocumentManager
    
        documentmanger.displayTips();                //outputs the tips
    
        string input, command, path, newPath;
        int i;
        while (getline(cin, input)) {
            istringstream is(input);
            string s;                                //deal this inputs
            for (i = 0; is >> s; i++) {
                if (s.compare("exit") == 0) {        //command is exit
                    exit(0);
                }
            }
            if (i != 2 & i != 3) {
                cerr << "your input is Illegal" << endl;
                continue;
            }
            istringstream temp(input);
            temp >> command >> path >> newPath;
    
            if (command.compare("mkdir") == 0) {     //command is mkdir
                const char* pa = path.c_str();
                documentmanger.make_dir(pa, 0755);
            }
            else if (command.compare("chdir") == 0) {
       //command is chdir
                const char* pa = path.c_str();
                documentmanger.change_dir(pa);
    
            }
            else if (command.compare("rmdir") == 0) {
       //command is rmdir
                const char* pa = path.c_str();
                documentmanger.remove_dir((char* )pa);
            }
            else if (command.compare("opendir") == 0) {
       //command is opendir
                const char* pa = path.c_str();
                documentmanger.open_dir((pa));
            }
            else if (command.compare("readdir") == 0) {
       //command is readdir
                const char* pa = path.c_str();
                documentmanger.read_dir(pa,1);
            }
            else if (command.compare("lldir") == 0) {
       //command is lldir
                const char* pa = path.c_str();
                documentmanger.read_dir(pa,0);
            }
            else if (command.compare("copy") == 0) { //command is copy
                const char* pa = path.c_str();
                const char* npa = newPath.c_str();
                documentmanger.copy_dir(pa, npa);
            }
        }
        return 0;
    }

#### 三、实验结果和截图 ####

![这里写图片描述][SouthEast]  
![这里写图片描述][SouthEast 1]  
![这里写图片描述][SouthEast 2]  
![这里写图片描述][SouthEast 3]  
![这里写图片描述][SouthEast 4]

[SouthEast]: https://img-blog.csdn.net/20170817220805215?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYWRtaW5wZA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
[SouthEast 1]: https://img-blog.csdn.net/20170817220818841?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYWRtaW5wZA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
[SouthEast 2]: https://img-blog.csdn.net/20170817220836920?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYWRtaW5wZA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
[SouthEast 3]: https://img-blog.csdn.net/20170817220849285?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYWRtaW5wZA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
[SouthEast 4]: https://img-blog.csdn.net/20170817220858857?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYWRtaW5wZA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast