This assignment will help you to understand Linux operating system file structur
ID: 3917825 • Letter: T
Question
This assignment will help you to understand Linux operating system file structure and basic file interface techniques. The systems administrator at your company has asked you to write a file utility program that gives useful information about the file system on the company server. Your program (written in C or C++) should include as a minimum:
A menu-driven or GUI interface (your choice)
Thorough commenting
Error handling
The ability to select a file or files to view
The ability to select specific information about a file(s) to display
The ability to change the permissions on a file or files
The ability to copy a file to a new directory
Explanation / Answer
Its partially done, but i guess you can extend it to complete it easily. Hope it helps!
#include<stdio.h>
#include<unistd.h>
#include<dirent.h>
#include<string.h>
#include<stdlib.h>
#define MAX_FILE_NAME_LEN 100
int main()
{
int file_count= 0;
int option=0;
struct dirent *de = NULL; //pointer for directory entry
printf("Hello welcome to the File Utility ");
printf("Enter the number for one of the below options to proceed: 1. Select File(s) 2.Exit ");
scanf("%d",&option);
//exiting utility if Exit option chosen
if(option == 2)
return 0;
//getting pointer of DIR tyoe for cwd
DIR *dr = opendir(".");
if(dr == NULL)
{
printf("Error in opening current working directory ");
return -1;
}
printf("The files present in current directory are: ");
while ((de = readdir(dr)) != NULL)
{
printf("%s ,", de->d_name);
file_count++;
}
closedir(dr);
//creating array to take input of name of files
char file_input[file_count*MAX_FILE_NAME_LEN + file_count];
//creating array of pointers to handle number of files
char* files[file_count];
printf(" Enter the name of the file to select. In case of multiple files, enter file names separated by ','. ");
scanf("%s",file_input);
printf("Files selected by you are: ");
char *temp = strtok(file_input,",");
int file_selected = 0;
while(temp != NULL)
{
printf("%s ",temp);
files[file_selected]=temp;
file_selected++;
temp=strtok(NULL,",");
}
//options for further functions
printf("Enter the number for one of the below options to proceed: 1. View Information of file 2.Change Permission 3. Copy file to different directory ");
scanf("%d", &option);
char command[1000]="";
char path[1000];
//switch case to handle with options
switch(option)
{
case 1:
for(int i=0;i<file_selected;i++)
{
strcat(command,"stat ");
strcat(command,files[i]);
system(command);
}
break;
case 2:
//can use same system command to create and execute chmod command for permission changes, hope that helps!
case 3:
printf("Please, enter the absolute path alongwith file name where you want to copy the selected files ");
scanf("%s",path);
strcat(command,"sudo cp ");
for(int i=0;i<file_selected;i++)
{
strcat(command,files[i]);
strcat(command," ");
}
strcat(command,path);
system(command);
break;
default:
printf("Invalid selection, exiting utility ");
return 0;
}
}