Ex7-os will compile only on ubuntu 20.04!! due to use of doctest.h for testing

Authors

• @Dolev Dublon, ID: 207867342
• @Yakov Khodorkovsky, ID: 207045063

How it works && how to run

we create a file named fs_data , which is going to be the file system. the size of the file will be determined by the parameter entered.

which contain a superblock 10% inodes and the other 90% of the size will be the datablocks 512 bytes size each

the max file size is 5120 the main folder is the root folder. which will contain all the files in the file system.

dirent contains d_name member so that in order to look for files in the filesystem we open the root folder and iterate over the directory entry and print the files names file name cant be longer than 8 bytes

to see the change in the filesystem

  make; ./demo

less fs_data 

  make ./test

sources

• https://www.geeksforgeeks.org/command-line-arguments-in-c-cpp/
• https://www.equestionanswers.com/c/c-printf-scanf-working-principle.php
• https://www.youtube.com/watch?v=n2AAhiujAqs&t=3777s
• https://github.com/dolev146/youtube-file-system

you can also specify an amount of files (inodes) you want in the system as a aparameter

  make clean; make; ./demo 20 

20 will be the amount of inodes you will get.

Bulding FAT32 virtual file system demo

in this project we need to make a virtual file system replica we need to implement the data class.

• myDIR
• mydirent
• myfs.h
• libmyfs.so

int mymount(const char *source, const char *target,

const char *filesystemtype, unsigned long

mountflags, const void *data);

int myopen(const char *pathname, int flags);

int myclose(int myfd);

ssize_t myread(int myfd, void *buf, size_t count);

ssize_t mywrite(int myfd, const void *buf, size_t count);

off_t mylseek(int myfd, off_t offset, int whence);

myDIR *myopendir(const char *name);

struct mydirent *myreaddir(myDIR *dirp);

int myclosedir(myDIR *dirp);

• myFILE
• libmylibc.so
• mystdio.h

myFILE *myfopen(const char *restrict pathname, const char *restrict mode)

int myfclose(myFILE *stream);

size_t myfread(void *restrict ptr, size_t size, size_t nmemb, myFILE *restrict stream);

size_t myfwrite(const void *restrict ptr, size_t size, size_t nmemb, myFILE *restrict stream);

int myfseek(myFILE *stream, long offset, int whence);

int myfscanf(myFILE *restrict stream,

const char *restrict format, ...);

int myfprintf(myFILE *restrict stream,

const char *restrict format, ...);

Run Locally

Clone the project

  git clone https://github.com/yakov103/Ex7-os.git

Go to the project directory

  cd Ex7-os

Install dependencies

  sudo apt install make
  sudo apt install g++ 

test the program

  make; ./test

Running Tests

The first test will test handling multiple clients

first run the server

  make clean;  make; ./test