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- 1. Advanced Operating System (Programming Assignment #1) Teacher’s Name Nabeel Sabir Khan Student Name Farhan Ali Student Reg.No L1S09MSCS0003 University Of Central Punjab Faculty of Computer Sciences (PICS)
- 2. 1. PCB I. Process Id (The id of the process to which it belongs to) II. User Id (The Owner of the process who initialize the process) III. Address Space a) Program Code (All the code of that is to be executed is placed here. A pointer called PC points it in the core memory) b) Static Data c) Heap d) Stack Both heap and stack extends in the opposite directions. There is a pointer SP that points to the Stack. IV. Open Files (Keep the information that a particular process is using in its execution and also shared by the child of that process) V. Memory management information VI. Privileged Information (Access that a particular process has) VII. Scheduling priorities VIII. Recourses information (All the resources which is occupy by this process) 2. Process Creation & Management I. fork(), vfork() (used for the creation of a process) II. wait() (used by a parent process to wait until its child has finish its execution) III. exec() (used by a process to run another program into it) IV. read(), write() (used by process to read and write data from memory or from some shared media)
- 3. V. pipe() (used to create a inter-process channel that is shared by different processes.) VI. exit() (used to terminate a process) VII. kill() (forcefully terminates the process of another process) VIII. getpid(), getppid() (used to get the process id and parent process id respectively) 3. C-Program Void main(){ cout<<”Enter the depth of the tree”; int tree_depth; cin>>tree_depth; main_process = fork(); if(main_process == 0){ cout<<”Process Id is”<<getpid()<<” and parent id is ”<<getppid(); for(int i=1; i<=tree_depth; i++){ } } }