Break keys, Computer Engineering

Assignment Help:

Like a normal read, your input should break on the new line character "\n"  and also on the up and down arrow keys. You will process the input made by the user when he/she enters new line.

History

Your shell must keep a history of the last 10 commands executed. When the user presses the up key the current input should show the last command executed (as the user typed it). So if the user executed the "ls" command, then pressed the up key, then pressed enter, the ls command should be executed. When the user presses up multiple times, you should replace the input with the next previous command. Until you reach the end of the history list (max of 10). If the user presses up and reaches the end of the list, the next time up is pressed nothing should happen. Conversely when the down arrow is pressed you should cycle through the history in the other direction. So if

the user presses down without pressing up, nothing should happen. That is because you will be at the bottom of the list. After a command is executed it should be added to the list and the index of where the user is in the history should be reset. This functionality should be similar to how the Bash shell works.


Related Discussions:- Break keys

Salient features of a parallel programmable interface-8255, Determine the s...

Determine the salient features of a parallel programmable interface, 8255. 24 I/O lines in 3 8-bit port groups - A, B, C A, B can be 8-bit input or output ports C

Secure systems development, Write an academic report on a significant softw...

Write an academic report on a significant software security exploit you have studied. Your report should include details such as, for example: The nature of the software vuln

Final implementation of object oriented modelling, Final Implementation of ...

Final Implementation of Object oriented modelling Final Implementation: At this phase, the final execution of classes and  relationships developed while object design takes

standard console application, Three projects as follows: a. Life  stati...

Three projects as follows: a. Life  static library, code for every needed  function in the Life program. b. LifeGame  .exe application, i.e., a standard console application t

Define the arithmetic micro-operations, Q. Define the Arithmetic Micro-oper...

Q. Define the Arithmetic Micro-operations? These micro-operations execute simple arithmetic operations on numeric data stored in registers. The fundamental arithmetic micro-ope

What are preprocessor directives, What are preprocessor directives? Pre...

What are preprocessor directives? Preprocessor directives: These are the commands given to a program called as pre-processor that processes the source code before it passes by

What is polling, What is polling? Polling is a scheme or an algorithm t...

What is polling? Polling is a scheme or an algorithm to recognize the devices interrupting the processor. Polling is employed when multiple devices interrupt the processor by o

A graph ''g'' with ''n'' nodes is bipartite, A graph 'G' with 'n' nodes is ...

A graph 'G' with 'n' nodes is bipartite if it have  no cycle of odd length.

Which error detecting method detect more errors, Error detecting method tha...

Error detecting method that can detect more errors without increasing additional information in each packet is? Error detecting method which can detect more errors without rais

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd