Delete command, Computer Engineering

Assignment Help:

When the user is inputting commands into your shell, it should properly handle delete and backspace. When one of these characters is detected, you will need to remove one character from the screen. For this, you can simply print a "\b" character to the screen. This will act as the backspace. Remember also to remove the character from the buffer you are using to store the

input. Here are the byte values for the delete and backspace characters:

delete  --> 127

backspace  --> 8

When the user presses delete or backspace, it should remove a character from the screen. But, it should not remove any of the prompts. For example, if the console looks like the following after the user typed the character "a",

/home/ p r o j e c t s / cs200 / spring12 / s h e l l >a

then if the user presses the backspace twice, the console should still look like:

/home/ p r o j e c t s / cs200 / spring12 / s h e l l >

Notice that the prompt is still intact.


Related Discussions:- Delete command

Which one is better hardware or software firewall, Which one is better hard...

Which one is better hardware or software firewall While deciding whether to buy a hardware or software firewall, the user must consider important factors such as performance an

What is traffic engineering, What is Traffic Engineering? Traffic engi...

What is Traffic Engineering? Traffic engineering gives the basis for analysis and design of telecommunication network to carry a specified traffic at an exact loss probability

Determine about the programmable read only memory, Programmable read only m...

Programmable read only memory (PROM) A PROM is a memory chip on which data can be written only one time. Once a program has been written onto a PROM, it's permanent. Unlike RAM

What are the functions of virtual file system, What are the functions of vi...

What are the functions of virtual file system (VFS)? a. It splits file-system-generic operations from their implementation explaining a clean VFS interface. It allows transpare

Determine the return loss and round trip delay for echo, In a national tran...

In a national transmission system, the characteristic impedances of the 4-wire circuit and the 2-wire circuit are 1200 ? and 1000 ? respectively. The average phase velocity of the

Processes of information system, Processes of Information System The b...

Processes of Information System The basic purpose of the Information System is to convert and manage data into something that is meaningful. Bocij et al (2003) lists the basic

Thematic analysis - flash design, Thematic Analysis & Interpretation: ...

Thematic Analysis & Interpretation: The next steps in analysis are to move beyond what is literally there in the image (formal visual elements) and examine the meaning they re

Paging, specification of paging ram size is 12 frames

specification of paging ram size is 12 frames

What is the efi shell?, The EFI community has formed an open source shell e...

The EFI community has formed an open source shell environment. Rather than booting directly into a full OS, on some executions, the user can boot to the EFI shell. The shell is an

Define virtualisation and explain computer architecture, Rentrag has decide...

Rentrag has decided to replace all of the computers currently being used by all of the business and office staff. He has asked you to recommend a set of specification for computers

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