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Write a threaded echo client / shell program using sockets in C/C++
Your problem is to add a "nice" feature to this program to allow a user to start a command-line shell on the host machine.
Modify the source code from the lecture so that when the client sends the command "shell" to server, all further commands from the client will be treated as shell commands on the server. Return back to normal operation when the user enters the "exit" command in the client (i.e., return to just echoing output).
You code must support multiple connections to the server. This means that the server has to keep track of multiple sockets: one to listen for new connections and then a socket pair per connection to which you direct output from the server (either echo or standard output from running shell commands).
On the server, the naive approach would be to use the system() system call to execute the command sent from the client. This works but leaves too much information available for a security analyst to detect what program is doing the malicious deeds.
Instead, use the code from the previous assignment and have the server code do a fork() and exec() to execute the command on the server. (EXTRA CREDIT: do what you can to mask the parent process id of the child process.)
Define monomeric and polymorphic type systems. Check in the Pascal manual if procedures and functions can be overloaded.
Define the following terms- Clipping, Normalize, Amplitude, Frequency and Rarefactions. Write the number -9 in two's complement.
Suppose that you are building 5 cylindrical nuclear reactors of various diameters. Ask the user to input height and diameter of each cylinder.
Describe and critically evaluate the role and relevance of [analytical investigation] to the solution of business information problems and Explain the concepts that underpin the subject area of [data mining] making reference to main established co..
question 1 use the auto summarize capability in ms word against a textual item you have.how well did it work. search
You have an option to implement it on Windows Server 2008 or Windows Server 2012.
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create a program that simulates a slot machine. when the program runs it should do the following1. asks the user to
Prepare a stacked bar chart that shows the total cost, including the design, implementation, and maintenance costs over an expected system life of seven years.
Make a recommendation to Fred about which is better for his company
Write an expression for the number of single dollars that would have to be paid.
A discrete multitone system is using a modulation technique on its subchannels. What is the maximum data rate of the discrete multitone system?
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