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

For what DMSP stands, For what DMSP stands? DMSP stans here for Dist ri...

For what DMSP stands? DMSP stans here for Dist ributed Mai l system Protocol.

How will you prepare problem statement, How will you prepare problem statem...

How will you prepare problem statement? Problem statement should state what is to be completed and not how it is to be executed. It should be a statement of requirements not a

Html 4.0 element, , an HTML 4.0 element supported by Netscape6 and MSIE, de...

, an HTML 4.0 element supported by Netscape6 and MSIE, defines a set of text which is associated with a specific form element. For illustration, code belo

Define TII, TII stands for? Ans. TII stands for Table of incomplete ins...

TII stands for? Ans. TII stands for Table of incomplete instructions.

What are the limitations of traditional payment instruments, What are the l...

What are the limitations of traditional payment instruments? The limitations of traditional payment system are that they take a lot of time.  These systems needs manual work to

Explain the term- viruses, Explain the term- Viruses Use of firewalls a...

Explain the term- Viruses Use of firewalls and ant-virus software to prevent viruses entering a computer. It's also sensible not to open attachments/emails from "unknown" sourc

Set up to use parallel virtual machine, Q. Set up to Use parallel virtual m...

Q. Set up to Use parallel virtual machine? PVM employs two environment variables when starting and running. Each and every PVM user needs to set these two variables to employ P

Explain about com add-ins, COM add-ins are software program's which are inc...

COM add-ins are software program's which are included into an application and they add already built in features to an existing application. They have general architecture across m

Device controllers, All components of computer communicate with processor b...

All components of computer communicate with processor by the system bus. Which means I/O devices required to be attached to system bus. But I/O devices aren't connected directly to

Qwerty - keyboard layout, Q. QWERTY - Keyboard Layout ? A keyboard layo...

Q. QWERTY - Keyboard Layout ? A keyboard layout is arrangement of keys across the keyboard. There is one keyboard layout which anybody who has worked on a standard keyboard or

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