▍Pipeline Communications
int main(int argc, char **argv){int pipefds[2],pipefds2[2];pid_t pid;int i,j;char buffer[255];If (pipe (pipefds) < 0)//first pipeline{printf("errorn");}pid=fork();if(pid<0)exit(1);if (pid==0){close(pipefds[1]);memset(buffer,0,sizeof(buffer));while(1){I=read (pipefds[0],buffer,sizeof...