Linux_cmd_lab #2

#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <fstream>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/uio.h>

using namespace std;

//помощь
void help(){
cout << "0 - Help" << endl << "1 - Copy file" << endl << "2 - Get info" << endl << "3 - Set rights" << endl << "4 - Exit"<< endl;
}

//копирование
void copy() {
        string file_in, file_out;
        cout << "Input name copy file\n";
        cin >> file_in;
        int out, in;
        if((in = open(file_in.c_str(), O_RDONLY)) == -1){
            cout << "File can't be readed\n";
             return;
             }
        cout << "Input name copyed file\n";
        cin >> file_out;
        if((out = open(file_out.c_str(), O_WRONLY)) == -1){
            cout << "File can't be writed or not exist\n";
              return;
            }
        char *buf[64];
        int in_out = read(in, buf, 64);
        while (in_out == 64){
            write(out, buf, 64);
            in_out = read(in, buf, 64);
        }
        write(out, buf, in_out);
}

//узнать статус файла
void file_status(){
    string filename;
    cout << "Input filename: ";
    cin >> filename;

    struct stat buf{};
    stat(filename.c_str(), &buf);
//SUID или SGID бит
    if (buf.st_mode & S_ISUID || buf.st_mode & S_ISGID)
        cout << 's';
    else cout << '-';
//создатель
    if (buf.st_mode & S_IWUSR)
        cout << 'r';
    else cout << '-';
    if (buf.st_mode &S_IWUSR)
        cout << 'w';
    else cout << '-';
    if (buf.st_mode &S_IXUSR)
        cout << 'x';
    else cout << '-';

//группа
    if (buf.st_mode &S_IRGRP)
        cout << 'r';
    else cout << '-';
    if (buf.st_mode &S_IWGRP)
        cout << 'w';
    else cout << '-';
    if (buf.st_mode &S_IXGRP)
        cout << 'x';
    else cout << '-';

//другие пользователи
    if (buf.st_mode &S_IROTH)
        cout << 'r';
    else cout << '-';
    if (buf.st_mode &S_IWOTH)
        cout << 'w';
    else cout << '-';
    if (buf.st_mode & S_IXOTH)
        cout << 'x';
    else cout << '-';
//sticky-бит
    if (buf.st_mode & S_ISVTX)
        cout << 't';

    cout << endl;
    cout << filename << ' ' << buf.st_size << " " << "byte " << buf.st_blocks << " " << "blocks\n";
}


//функция задания прав
void set_file_rights(){
    string filename;
        cout << "Input filename: ";
        cin >> filename;

        char y_n;
        cout << "Input new file rights r(Read) w(Write) x(eXecute) for owner, group and other\n";
        int rights = 0;
        cout << "PLEASE!!!, Enter '1', if you want agree\n";
        cout << "For owner\n";
        cout << "R\n";
        cin >> y_n;
        if(y_n == '1') rights += 256;
        cout << "W\n";
        cin >> y_n;
        if(y_n == '1') rights += 128;
        cout << "X\n";
        cin >> y_n;
        if(y_n == '1') rights += 64;

        cout << "For group" << endl;
        cout << "R\n";
        cin >> y_n;
        if(y_n == '1') rights += 32;
        cout << "W\n";
        cin >> y_n;
        if(y_n == '1') rights += 16;
        cout << "X\n";
        cin >> y_n;
        if(y_n == '1') rights += 8;

        cout << "For other" << endl;
        cout << "R\n";
        cin >> y_n;
        if(y_n == '1')rights += 4;
        cout << "W\n";
        cin >> y_n;
        if(y_n == '1') rights+= 2;
        cout << "X\n";
        cin >> y_n;
        if(y_n == '1') rights += 1;

    chmod(filename.c_str(), rights);
}



int main(int argc, char* argv[]) {

        int action;
    while (true) {
            cout << "Choose action ('0' for help)\n";
            if (!(cin >> action)) {
            }

            //помощь
            else if(action == 0) {
                help();
                break;

            }
            //копировать
            if(action == 1) {
                copy();
                break;

            }
            //узнать статус
            else if(action == 2) {
                file_status();
                break;

            }

            //задать права
            else if(action == 3) {
                set_file_rights();
                break;

            }

            //выйти
            else if(action == 4) {
                return 0;

            }

            else {
                cout << "Error!" << endl;

            }

        }
    }