Operating Systems

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410442 Operating Systems

Teaching Scheme                                                                      Examination Scheme

 Lectures: 3 HrslWeek                                                               Theory: 100 Marks
.

Objectives

. To study advanced concepts of operating systems.

. To study the comparison of different function of different OSs.

UNIT I :

Process synchronization and inter-process communication:

Background, Critical section problem, semaphores, classic problems of 
synchronizations, critical

regions, monitors, OS synchronization                                                                                 4 Hrs

UNIT II :

Deadlocks: System model, deadlock characterization, methods for handling deadlocks, deadlocks detection, prevention, avoidance, recovery

Protection: Goals of protection, domain of protection, Access matrix, Implementation of Access matrix, Revocation of a(:cess rights

Security: Security problem, User authentication, program threats, system threats, securing system

and facilities, Intrusion detection and cryptography                                                               6 Hrs

UNIT III :

System Architecture, User perspective, Operating System Services, Assumptions about hardware, Architecture of UNIX OS, Introduction to System Concepts, Kernel Data Structures, System Administration, Buffer Headers, Structure of the Buffer Pool, Scenarios for retrieval of a Buffer, Reading and Writing Disk Blocks, Advantages and Disadvantages of the Buffer Cache

8 Hrs

UNIT IV :

Internal Representation of files: Inodes, Structure of a regular file, Directories, Conversion of a path name to an Inode, Super Block, Inode assignment to a new file, Allocation of Disk Blocks, Other file types,

System Calls for the file system: open, read, write, file & Record Locking, lseek, Close, File Creation, Creation of Special Files, Change Directory and Change Root, Change Owner and Change Mode, stat and fstat, pipes, dup, mounting and unmounting file systems, link, unlink, file system abstrations, file system maintenance                                   8 Hrs

UNIT V :

Structures of processes: Process States and Transitions, Layout of System Memory, The Context of a process, Saving the context of a process, Manipulation of the process address space, Sleep,

Process control: Process Creation, Signals, Process Termination, Awaiting Process Termination, Invoking other programs, The User ID of a process, Changing the size of a process, The shell, System boot and the init process,

Process Scheduling and Time: Process Scheduiing, System calls for time & clock

8 Hrs

UNIT VI :

Memory Management Policies: Swapping, Demand Paging, a hybrid system with swapping and demand paging

I/O Subsystem: Driver interfaces, Disk drivers, Terminal drivers, Streams                              4 Hrs

Text Books:

      1. William Stallings, "Operating System-Intemals and Design Principles ", 5/c, Prentice

            Hall India, ISBN-81-297-0 1 094-3

      2. Silberschatz, Galvin, Gagnes , "Operating System Concepts" 6/e , John Wiley & Sons,

            ISBN-9971-51-388-9

Reference Books:

       I. Dhamdhre D. M.,"Operating Systems - A Concept-Based Approach", Tata McGraw Hill

             Publications, 2nd

             Edition-2006

       2. Andrew S. Tanenbaum, " Modem Operating Systems", 2/e, Prentice Hall India, ISBN­

             81-203-2063-8 .

       3. Maurice J. Bach, "The design of the UNIX Operating System", Prentice Hall India,

             ISBN-81-203-0516- 7