Create a program(forkchildren.c) that will fork off two children. One child will run the “ls -l” command. The other will run “cat forkchildren.c”. The main program will wait for the children to finish and then print a note saying it is finished and then it will end. No pipe is needed for this assignment, each child
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- Create a program(forkchildren.c) that will fork off two children.
- One child will run the “ls -l” command.
- The other will run “cat forkchildren.c”.
- The main program will wait for the children to finish and then print a note saying it is finished and then it will end.
- No pipe is needed for this assignment, each child is separate.
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- Modify this code to let it run concurrently to send and receive any messages between 2 processes and take one command line argument to change between 2 processes, for example, 1 or 2 to indicate the process 1 or process 2. #include <unistd.h>#include <stdlib.h>#include <stdio.h> #include <string.h>#include <fcntl.h>#include <sys/types.h>#include <sys/stat.h>#define FIFO_NAME “/tmp/my_ fo”int main(int argc, char *argv[]){int res, open_mode = 0; if (argc < 2){fprintf(stderr, “Usage: %s <[O_RDONLY, O_WRONLY, O_RDWR, O_NONBLOCK]>\n”, *argv); exit(EXIT_FAILURE);}argv++;if (*argv){if (strncmp(*argv, “O_RDONLY”, 8) == 0)open_mode |= O_RDONLY;if (strncmp(*argv, “O_WRONLY”, 8) == 0)open_mode |= O_WRONLY; if (strncmp(*argv, “O_RDWR”, 6) == 0) open_mode |= O_RDWR;if (strncmp(*argv, “O_NONBLOCK”, 10) == 0)open_mode |= O_NONBLOCK;} if (access(FIFO_NAME, F_OK) == -1{res = mk fo(FIFO_NAME, 0777);if (res){fprintf(stderr, “Could not create fo%s\n”,…please write with proper explanation. Question half solution is here please write what is main disadvantages of this approach? Half solve questions: Mutual Exclusion: Mutex is an abbreviation for Mutual Exclusion. It is a programme object that prevents multiple users from accessing a shared resource at the same time. When a process accesses a shared variable, it is said to be in the critical section. When no two processes are present in the critical section at the same time, this is referred to as Mutual Exclusion or Mutex. while (true) { semaphore sem = S; while (S <= 0) do no operation { S = S-1; wait (S); } /*critical section*/ while (S > 0) { S = S+1; signal (S); } /*remainder section*/ }PID is a command to print all jobs stemming from a particular ID. (T/F) The preprocessing phase of compilation is the phase which breaks the code down to machine code (T/F) git is used as a source control management system. (T/F) When a C program forks off a child, the new process overlays the old process. (T/F)
- Write a program i.e. is a version of a shell that can take command(s) from the user and execute them on behalf of the user (by spawning a child process to execute the command on behalf of the parent process). It can only execute a few commands as listed below: [+] mkdir [ ... ] [+] ls [] [+] cp [+] mv [ ... ] [+] rm where parameters enclosed in [ ] are optional parameters. Note that multiple commands are recognized by the shell if each command is delimited by ";". These commands will be executed one after the other. Write a C program will act as a shell interface that should accept and execute each command in a separate process. There should be a parent process that will read the command and then the parent process will create a child process that will execute the command. The parent process should wait for the child process before continuing. Your program should mimic the Linux terminal. This program should be written in C and executed in Linux. You are required to implement five…C++ 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!!In C++ Implement a simple version of the linux grep command in C++. grep - Looks through a file, line by line, trying to find a user-specified search term in the line. If a line has the word within it, the line is printed out, otherwise it is not. Use the system calls open(), getline(), close(). Requirements (examples run from. terminal) Your program grep is always passed a search term and zero or more files to grep through (thus, more than one is possible). It should go through each line and see if the search term is in it; if so, the line should be printed, and if not, the line should be skipped. [terminal]$ ./grep ! main.cpp main2.cppcout << "Hello, World!";cout << "Programming is great fun!"; The matching is case sensitive. Thus, if searching for world, lines with World will not match. Lines can be arbitrarily long (that is, you may see many many characters before you encounter a newline character, \n). grep should work as expected even with very long lines. For…
- Write a C program which creates two childprocesses. One of the child processes mustopen data1.txt and fill it with 10 randomintegers (0-9). The other child process mustopen data2.txt and fill it with 10 randomletters (a-z). In the meanwhile, parent mustprint both child processes' id's and wait forthem to finish.What usually happens when a child process accesses the parent's message buffer through unnamed pipes?My name is Fatima Execute the code using Linux interfacesMake the file name your own, for example (touch seaid.c)Take a picture of the input and output Program 4:1 Orphan process//orphan process#include <stdio.h>#include<unistd.h>int main ( ){int pid ;printf ("I'am the original process with PID %d and PPID %d.\n", getpid ( ), getppid ( ) ) ;pid = fork ( ) ; /* Duplicate. Child and parent continue from here */if ( pid != 0 ) /* pid is non-zero, so I must be the parent */{printf ("I'am the parent process with PID %d and PPID %d.\n", getpid ( ), getppid ( ) ) ;printf ("My child's PID is %d\n", pid ) ;}else /* pid is zero, so I must be the child */{sleep (4) ; /* make sure that the parent terminates first */printf ("I'am the child process with PID %d and PPID %d.\n", getpid ( ), getppid ( ) ) ;}printf ("PID %d terminates.\n", getpid ( ) ) ;}
- What typically happens when a child process accesses the parent's message buffer using unnamed pipes?You are required to write a C program on Unix/Linux in which the parent process creates three child processes, lets them run concurrently, and waits for them to return and prints their exit status. The three child processes are assigned different tasks. Child one is to calculate and display the average mark of a class of twenty students for a unit. Child one is required to get the marks from the standard input (i.e. the keyboard). Child two is to load a program called “wc” (word count) to count file1. Child two is required to get file1 by the command line argument. Child three is to modify file2 by first inserting “this is the updated version.” at the beginning of this file and then replacing all the occurrences of the word “run” by “execute” and “examine” by “study”. You are required to write your OWN program for the file update. Child three is required to get file2 by the command line argument.What typically happens when a child process accesses the parent's message buffer via unnamed pipes?