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detailed explanation on unix file system
- 1. UNIX FILE SYSTEM SEMESTERPROJECT
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- 3. Introduction: • Our projectis UNIX file system. • It is a type of software that manages data files in a computer system. • It may display file details, file name, file size, save a file and delete file • This system makes file management simple.
- 4. Operating system: • Operatingsystem is a system software that act as interface between user and computer hardware • Brain of computer • Control all components of computer
- 5. What is UNIX •UNIX is multiuser, multitasking OS that runs on a wide variety of computer system from micro to super computer • UNIX was developed in 1969 by Kem ThompsonAND Dennis Ritchie. • It was written in c language.
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- 7. file system: • Whatis File System? The abstraction used by kernel to represent and organize the storage resources. • UNIX File System in general File system is organized in tree structure. File name must NOT LONGER than 256 chars. Single path name must NOT LONGER than 1023 chars.
- 8. Purpose: • The purposeof file system project is to clarify the functionality of file. • Basically, file management is used for file maintenance or maintenance operations. • File management keeps your data organized and in hierarchical form with proper naming and directory. • The main purpose of a file manager is to enable users to create and store new files on a device
- 9. Main Features OfProject •Save file •View file •File details & size •Clear & delete file •Exit program
- 10. •Name – onlyinformation kept in human-readable form •Identifier – unique tag (number) identifies file within file system •Type – needed for systems that support different types •Location – pointer to file location on device •Size – current file size attributes
- 11. •Protection – controlswho can do reading, writing, executing •Time, date, and user identification – data for protection, security, and usage monitoring •Information about files are kept in the directory structure, which is maintained on the disk Attributes(cont.)
- 12. / the rootdirectory /bin or /sbin commands for basic system operation /dev device entries /etc critical startup and configuration files Structure of File System
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- 14. structure of FileSystem(cont…)
- 15. Directory Structure Directory Files Both thedirectory structure and the files reside on disk F 1 F 2 F 3 F 4 F n
- 17. Directory Organization • Thedirectory is organized logically to obtain • Efficiency – locating a file quickly • Naming – convenient to users • Two users can have same name for different files • The same file can have several different names • Grouping – logical grouping of files by properties, (e.g., all Java programs, all games, …)
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- 19. File System Mounting •A file system must be mounted before it can be accessed • A unmounted file system (i.e., Fig. 11-11(b)) is mounted at a mount point
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- 22. • Kernel maintainsfile information in a structure called inode. • Creation, modification time stamps • Ownership, file size etc. • Commonly used INODE information can be found by using ls command • Group information and be modified by using chgrp command. INODE
- 23. REQUIREMENTS Functional requirements: • Datainsertion • Deletion • Clearing data inside file • File structure and organization • Proper naming Software requirements • 512 MB RAM • 320 GB hard disk • Windows 7 or higher.
- 24. Project structure & functionalities: PROJECTCOMPRISES OF 7 FUNCTIONS CONNECTED TO EACH OTHER AND WORKING TOGETHER.
- 25. Project structure &functionalities: 1. Save a file 2. View file content 3. Obtain file size 4. File details 5. Clear file data 6. Delete a file 7. Exit
- 26. Language & Compiler: • Projectis developed using C++ language. • we have used Dev C++ compiler for coding which is based on command line interface. Insertion: • There is no pre-defined insertion in program • Program gets data from user on run time.
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