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

Two ways for restricting the value range for a domain, What are the two way...

What are the two ways for restricting the value range for a domain? By specifying fixed values. By stipulating a value table.

Public key infrastructure solutions, Public Key Infrastructure solutions ...

Public Key Infrastructure solutions The use of public-key based security systems requires great attention and due care in design and management of security features. The secur

Determine number of final selector in 10000 line exchange, In a 10000 line ...

In a 10000 line exchange, 0000 to 2999 is allotted to x group of subscribers, out of which 40% are active during busy hour. The remaining numbers are domestic numbers out of which

Define the system users, Q. Define the System users? System users are d...

Q. Define the System users? System users are defined as the people who employ information systems or who are affected by information system on a regular basis i.e. validating,

Illustrate decimal fixed point representation, Q. Illustrate Decimal Fixed ...

Q. Illustrate Decimal Fixed Point Representation? The point of this representation is to keep the number in decimal equivalent form and not binary as above. A decimal digit is

Defined for a push button fields in the screen attributes, What is to be de...

What is to be defined for a push button fields in the screen attributes? A function code has to be described in the screen attributes for the push buttons in a screen.

Mathlab , Windy Grid World This assignment is to use Reinforcement Learni...

Windy Grid World This assignment is to use Reinforcement Learning to solve the following "Windy Grid World" problem illustrated in the above picture. Each cell in the image is a

Explain about theta notation, Q. Explain about Theta Notation? Theta Θ...

Q. Explain about Theta Notation? Theta Θ Notation : The set Θ (g(n)) comprises all functions f(n) for that there exist positive constants c1,c2 such that f(n) is squeezed in b

Difference between top-down and bottom-up programming, What is the differen...

What is the difference between top-down and bottom-up, programming? Ans: Top-down and Bottom-up Approaches In Top-down programming approach, we begin by identifying the main

Difference between visual check and parity check, Difference between Visual...

Difference between Visual check and Parity check Visual check This is checking for errors by comparing entered data with original document (NOTE: this is not the same as

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