Anonymous

#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

int main(void) {
   pid_t childpid;

   int fd[2]; //file descriptor1
   int fd2[2];//file descriptor2



   //pipe them both
   if (pipe(fd)==-1 || pipe(fd2) == -1) {
     printf(" i blame capitalism \n" );
   }

   //connects both ends of pipes via dupe
   if (dup2(fd[0], fd2[1]) == -1 ) {
     printf(" failed at connecting\n");
   }

   childpid = fork();
 
   /* Hi is the child */
   if (childpid==0) {                                 
     if (dup2(fd[1] , 1) == -1) {
       perror("Failed to redirect stdout of ls");
     }
     else {
       printf("HI\n");//Send HI to fd[1].
     }
     return 1;
   }

   /* word count is the parent */
   if (dup2(fd2[0], 0) == -1) //Get output from fd2[0]               
       perror("Failed to redirect stdin of sort");
   else {
     execl("/usr/bin/wc", "-cl", NULL);//exec should read fd2[0]'s output
     perror("could not call anything");
   }
   return 1;
}