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Question 2 (v1) [8 points] The C program fragment shown below is intended to redirect the standard output of the calendar program cal to the standard input of the word counting program wc.
1. Complete the code below. Use pipes for communications. You may assume that all valid system calls are successful. Don¡¯t use either the system() or the popen() system calls.
2. Explain the circumstances under which the program writes the line ¡°Finished process- ing¡±.
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int main (int argc, char *argv[]) {
pid_t pid;
if ((pid= fork()) < 0)
if (pid > 0) {
//error occurred
if (execlp(“/usr/bin/cal”, “cal”, “2022”, (char *) 0) < 0) //error occurred
if ( execlp("/usr/bin/wc", "wc", (char *) 0) < 0 ) //error occurred
printf ("Finished processing \n");
University of Alberta examination University of Alberta examination
University of Alberta examination
University of Alberta examination University of Alberta examination
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