OS Roles, Services System Calls

OS Roles, Services System Calls

1. Roles of OS

   • Process management
     • A process a running program
       • Starting, terminating processes
         • Coordinating processes (allowing processes to talk to one another, protecting them from one another)
   • Memory Management
     • Allocation of memory for the processes
       • Protect memory from being written by another process
         • How to handle when we run out of RAM
   • I/O Management
     • Device drivers
       • Providing API for the user programs (encapsulation principle)
   • Storage Management
     • File systems and data