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

Applications of generic framework for e-commerce executed, How are applicat...

How are applications of generic framework for e-commerce executed? To execute applications, this is essential to have Supporting Information and Organizational Infrastructure a

Show the categories of web browser, Q. Show the categories of Web browser? ...

Q. Show the categories of Web browser? The two basic categories of Web browser are: • Text-only browsers: A text-only browser like Lynx allows you to view Web pag

Explain the working of a weighted register d/a converter, With the help of ...

With the help of a neat diagram, explain the working of a weighted-resistor D/A converter. Ans Weighted Register D/A Converter:   Digital input that has 4 bits

Details of load sharing facility resource management, Primary objectives/de...

Primary objectives/details of Load Sharing Facility Resource Management Software (LSFRMS) are better resource utilisation by routing task to most suitable system as well a better u

Assembly program, where do i get some sample assembly projects (with coding...

where do i get some sample assembly projects (with coding included)?

What do you mean by rad, a. What are the activities included during the pro...

a. What are the activities included during the process of developing a formal specification of a sub-system interface? b. Explain the Pair Programming? What are the benefits of

Distinguish between combinational & sequential logic circuit, Distinguish b...

Distinguish between combinational logic circuits and sequential logic circuits. Ans: Combinational logic circuits:- (i) Outputs only depend upon present state of the i

Computation step in time complexity of an algorithm, Q. Computation step in...

Q. Computation step in time complexity of an algorithm? So First in the computation step the local processor executes an arithmetic and logic operation. Afterwards the several

Communications between the user and the server, Communications between the ...

Communications between the user and the server A significant enhancement was achieved when communications between the user and the server was sent in encrypted form and later

Explain about aggregations, OLAP can process difficult queries and give the...

OLAP can process difficult queries and give the output in less than 0.1 seconds, for it to achieve like performance OLAP uses aggregations. Aggregations are built by aggregating an

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