Chapter 2 - Operating-system structures provides new coverage of user interfaces for mobile devices, including discussions of iOS and Android, and expanded coverage of Mac OS X as a type of hybrid system. | Chapter 2: Operating-System Structures Operating System Concepts – 9th Edition Silberschatz, Galvin and Gagne ©2013 Chapter 2: Operating-System Structures Operating System Services User Operating System Interface System Calls Types of System Calls System Programs Operating System Design and Implementation Operating System Structure Operating System Debugging Operating System Generation System Boot Operating System Concepts – 9th Edition Silberschatz, Galvin and Gagne ©2013 Objectives To describe the services an operating system provides to users, processes, and other systems To discuss the various ways of structuring an operating system To explain how operating systems are installed and customized and how they boot Operating System Concepts – 9th Edition Silberschatz, Galvin and Gagne ©2013 Operating System Services Operating systems provide an environment for execution of programs and services to programs and users One set of operating-system services provides functions that are helpful to the user: User interface - Almost all operating systems have a user interface (UI). Varies between Command-Line (CLI), Graphics User Interface (GUI), Batch Program execution - The system must be able to load a program into memory and to run that program, end execution, either normally or abnormally (indicating error) I/O operations - A running program may require I/O, which may involve a file or an I/O device Operating System Concepts – 9th Edition Silberschatz, Galvin and Gagne ©2013 Operating System Services (Cont.) One set of operating-system services provides functions that are helpful to the user (Cont.): File-system manipulation - The file system is of particular interest. Programs need to read and write files and directories, create and delete them, search them, list file Information, permission management. Communications – Processes may exchange information, on the same computer or
