Create a shell script that lists all the files in the present working directory in long format name this file listMyFiles.sh. Write a c program that uses the system () function and uses it to run listMyFiles.sh
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Question 1
a) Explain the difference between ls -l > mylisting.txt and ls -l >> mylisting.txt
b) Create a shell script that lists all the files in the present working directory in
long format name this file listMyFiles.sh. Write a c
system () function and uses it to run listMyFiles.sh
c) Create a daemon in C in the Unix environment, your daemon must create a
text file called aitDaemonLog.txt and populate it with 1000 lines of a string
each line must be written after 10 seconds, the string must end with the count
of the string;
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- Assignment #3: Unix shell with redirects and pipes The purpose of this assignment is to learn to develop multi-process programs. You are expected to extend the myshell.c program and add pipelines and I/O redirections. In particular, your shell program should recognize the following: > - Redirect standard output from a command to a file. Note: if the file already exists, it will be erased and overwritten without warning. For example, COP4338$ ls > 1COP4338$ sort myshell.c > 2 Note that you're not supposed to implement the Unix commands (ls, sort, ...). You do need to implement the shell that invoke these commands and you need to "wire" up the standard input and output so that they "chain" up as expected. >> - Append standard output from a command to a file if the file exists; if the file does not exist, create one. For example, COP4338$ sort myshell.c >> 1COP4338$ echo "Add A Line" >> 1 < - Redirect the standard input to be from a file, rather than the…1) Create a daemon in C in the Unix environment, your daemon must create a text file called aitDaemonLog.txt and populate it with 1000 lines of a string each line must be written after 10 seconds, the string must end with the count of the string;. 2)Create a shell script that lists all the files in the present working directory in long format name this file listMyFiles.sh. Write a c program that uses the system() function and uses it to run listMyFiles.sh 3)Write a c program to write a string of your own choosing into shared memory then read the contents of the shared memory created in 4)demonstrate in a c program how to use a fork to create a child process, using pipes let this child process send a message which is read by the parent process 5) Write a c program that shows the PID, PPID, UID and GID of a running process, let this process fork thus creating a child process, let the parent process count from 0 to 50 and the child process from 0 to 25 each process showing while counting…1.What is the primary goal in using a scripting language for programming work? 1.Write a shell program that counts the number of files in a given directory. Thedirectory should be specified as a command line argument. The program doesnot need to count files recursively in subdirectories; instead, it should not count subdirectories at all.
- Need help to implement networking in python Server.py Load data from file This option will ask the user for a fully qualified path and will load a JSON file containing the information for users and pending messages. The format of the JSON file will be defined based on your implementation and it will the same used to save the data into file (menu option #4). Functionalities the server must provide: 1) User Sign Up: adds a user identified by a phone number to the system. a) Protocol: USR|username|password|display_name b) Response: 0|OK for success. 1| for an error. c) The server should validate that the username does not exist 2) User Sign In: verify user credentials a) Protocol: LOG|username|password b) Response: i) 0|OK → the credentials are correct. ii) 1|Invalid Credentials iii) 2|Already Logged In → in case that the user is logged in from another client. c) This will help the server knowing which user is connected. d) The server should keep a list of connected clients, which should…Write a Shell program in C that can handle pushd, popd , and dirs commands supported by many shell programs including bash, tcsh and zsh. examples/how it works: The user enters pushd + [directory] The user enters popd The user enters dirsC++ PLEASE!! Working on a project that is about word count with MapReduce, need a file manager class to take care of reading all txt file from a directory with giving path. The file manager class need to open the directory with the giving path which the user will input, then open the path and open all the txt files in that directory and break the text into single line and pass it to another class to do mapping. Please help with the file manager class!! Thank you!!
- Question 2 Write a C program which creates 5 threads for storing numbers sequentally from 0 to 50.000 in a file named "numbers.dat". Each thread must write 10.000 numbers (e.g. first thread writes 0 - 9.999, second thread writes 10.000 – 19.999, etc).Please write a c++ program that will take in a file, a number_of_bytes and number_of_threads. So it will take in 3 arguments in the command line. mmap the number_of_bytes of the given file into memory. The program will mmap 100 Megabyte of file into memory and use 4 threads to examine the bytes. The main will not participate in the computation, but will create the specified number of threads, and wait for them to complete the computation, and the main will then print the answer. At most 8 threads will be specified to be created. Each file will contain a long string of letters like DNA, i.e. a,c,g,t The program should determine how many 20-character substrings contain more than 11 a's. For example, in this string there are characters matches: tattataaagtagaaatataactgaaggttcagccgctggattataaagtagaaatataaaaagtagaaatataactgaa The program should output: total matches number # number is replaced by the correct numberComputer Science Write a C/C++ program, call it findExt, to find all files in a directory hierarchy, whose extensions are in the extension list provided as arguments to the program. Your program should print the whole pathnames of the found files. Synopsis: findExt <extension-list> [-t target-directory] When target-directory is missing, the working directory (./) will be the target directory Some sample runs: $ findExt txt pdf That is, find all files whose extensions are either txt or pdf in the directory hierarchy ./ $ findExt jpg -t $HOME //target directory is home directory That is, find all files whose extensions is jpg in the directory hierarchy $HOME Requirement: - You must use the system call nftw() that allows you to walk across a file tree. This system call will do all the recursive walk and each time it visits a file or a directory, it will call your own function (a function that you pass as a parameter).
- 92. In external hashing for files of disk, the pointers which contain record position and block address within the block are classified as a. position pointers b. address pointers c. block pointers d. record pointersAssignment #3: Unix shell with redirects and pipes OCELOT UNIX OS **PLEASE INCLUDE PIPING, ANSWERS WITHOUT IT ARE NOT VERY HELPFUL SINCE THEY DONT INCLUDE IT** The purpose of this assignment is to learn to develop multi-process programs. You are expected to extend the myshell.c program and add pipelines and I/O redirections. In particular, your shell program should recognize the following: > - Redirect standard output from a command to a file. Note: if the file already exists, it will be erased and overwritten without warning. For example, COP4338$ ls > 1COP4338$ sort myshell.c > 2 Note that you're not supposed to implement the Unix commands (ls, sort, ...). You do need to implement the shell that invoke these commands and you need to "wire" up the standard input and output so that they "chain" up as expected. >> - Append standard output from a command to a file if the file exists; if the file does not exist, create one. For example, COP4338$ sort myshell.c >>…Need Help with C++ coding, and please explain the first step in detail. Write a program in C++ that performs three functions using threads on the attached text file called long_text.txt 1. Write your code in a such way that you can show in terms of time that using threads does not keep you blocked i.e., the main thread gets free once all threads start. a.This means that your program will run the three functions without threading and then with threading. 2. Functions to implement are: a. word_count() → will count the number of words in the text file b. sentence_count() → will count the number of sentences in the text file c. find_frequent_word() → finds the most frequently occurring word and number of times it occurred in the text