operating system exercise threads, Exercises of Computer science

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Operating System

Operating System Learning Objectives: In this lab, you will learn about Intercrosses communication with signals and pipes. ‘The Linux IPC (Inter-process communication) facilities provide a method for multiple processes to communicate with onc another. There are several methods of IPC available to Linux C programmers: Pipes Signals Message queues Semaphore sets Shared memory segments Sockets Pipes are known as the oldest communication mechanism under UNIX. To create a simple pipe with C, we make use of the pipe() system call. It takes a single argument, which is an array of two integers, and if successful, the array will contain two new file descriptors to be used for the pipeline. A pipc is created by calling the pipe () function in the following way. int fd[2}; if (pipe(fd) < 0) print{{*Error!\n"); ‘The pipe() function is invoked. This returns two valid file descriptors in the array given as the argument. The input of the first file descriptor (l[0]) is the output of the second file descriptor (fa{1). Exercise 01:Write the following program and execute to understand the concept of pipe. #include main() { int pipefd[2]; int i; char s[1000}; char *s2; if (pipe(pipefd) < 0) { perror("pipe’); exit(1); }