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

What types of data entry services do you perform, What types of data entry ...

What types of data entry services do you perform? Our business is to understand what data you require entered and in what particular format. After an initial analysis is perfor

Explain documentation libraries, The documentation rules are almost exactly...

The documentation rules are almost exactly the similar as for Scripts "Documenting scripts". Although from a technical point of view it is feasible to place measures in libraries i

Hybrid model, The hybrid models are mostly tailormade models suiting to exa...

The hybrid models are mostly tailormade models suiting to exact applications. Actually these fall in the category of mixed models. Such type of application-oriented models keep cro

Options with dir in dos, Q. Options with DIR in DOS? You can use a numb...

Q. Options with DIR in DOS? You can use a number of options with DIR. To get the list of files from any other drive, denote the drive name followed by ':' with DIR. For exam

Explain the physical and logical paths in a computer, How is communication ...

How is communication between computers established in Internet. What characteristics need to be defined in a communication protocol? Explain the physical and logical paths in a com

Name the two operations of stack, Name the two operations of stack A st...

Name the two operations of stack A stack has only two operations and they are insertion and deletion of items. The operation insertion is called push (or push-down) as it can b

Conversion of base 10 to base 22 numerical system?, Hypothesis ... since th...

Hypothesis ... since the Hebrew language is a Numerical language meaning that each letter in their alphabet has a numerical value. I believe, that the Hebrew-language based on a r

Operation of micro-programmed control unit, Micro-instructions are stored i...

Micro-instructions are stored in control memory. Address register for control memory comprises the address of subsequent instruction which is to be read. Control memory Buffer Regi

Programs, A palindrome is a string that reads the same from both the ends. ...

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

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