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

What about page footer, By default, this page is quite barren. Though, go e...

By default, this page is quite barren. Though, go explore the Query Page some more; you will search that you can store numerous queries on the server, so if you regularly run a cer

Explain the synchronous-transmission, A control character is sent at the be...

A control character is sent at the beginning as well as at the end of every block in the synchronous-transmission in order to  (A) Synchronize the clock of transmitter and rece

Which function type is used for using "at exit-command", Which Function typ...

Which Function type has to be used for using "at exit-command" ? To Use AT EXIT - COMMAND, We must assign a function Type "E" to the relevant function in the MENU Painter OR S

Explain about the public key cryptography, Explain about the Public Key Cry...

Explain about the Public Key Cryptography. Public Key Cryptography: It is a cryptographic system which uses two keys as a public key identified to everyone and a private

Explain about olap, OLAP is called as online analytical processing which gi...

OLAP is called as online analytical processing which gives answers to queries which are multi dimensional in nature. It composes relational reporting and data mining for giving sol

Posix, POSIX is the IEEE's Portable Operating System Interface for Computer...

POSIX is the IEEE's Portable Operating System Interface for Computer Environments. The standard provides compliances criteria for operating system services and is designed to allow

Explain data parallel programming, Q. Explain Data Parallel Programming? ...

Q. Explain Data Parallel Programming? In data parallel programming model major focus is on performing concurrent operations on a data set. The data set is characteristically or

Explain sample instruction format of mips instruction, Q. Explain Sample In...

Q. Explain Sample Instruction Format of MIPS instruction? All MIPS instructions are of same size and are 32 bits long. MIPS designers chose to keep all instructions of same len

Define polling, Define Polling. A Polling process is used to recognize...

Define Polling. A Polling process is used to recognize the highest priority source by software means. In this process there is one common branch address for all interrupts.

What are the types of smart cards utilized in e-commerce, What are the type...

What are the types of smart cards utilized in e-commerce? Usually, there are two types of smart cards as: Memory smart cards, that can be viewed by minuscule removable read

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