// C program to implement one side of FIFO 
// This side writes first, then reads 
#include <stdio.h> 
#include <string.h> 
#include <fcntl.h> 
#include <sys/stat.h> 
#include <sys/types.h> 
#include <unistd.h> 

int main() 
{ 
	int fd; 

	// FIFO file path 
	char * myfifo = "/export/home/public/spiegel/cis552/demo/FIFO/myfifo"; 
	printf("Start rw to get the prompt\n");
	// Creating the named file(FIFO) 
	// mkfifo(<pathname>, <permission>) 
	mkfifo(myfifo, 0666); 

	char arr1[80], arr2[80]; 
	while (1) 
	{ 
		// Open FIFO for write only 
		fd = open(myfifo, O_WRONLY); 

		// Take an input arr2ing from user. 
		printf("Enter a string of up to 80 characters\n");
		// 80 is maximum length 
		fgets(arr2, 80, stdin); 

		// Write the input arr2ing on FIFO 
		// and close it 
		// printf("About to write %s to pipe with descriptor %d\n",arr2,fd);
		write(fd, arr2, strlen(arr2)+1); 
		// printf("Wrote %s to pipe with descriptor %d\n",arr2,fd);
		close(fd); 

		// Open FIFO for Read only 
		fd = open(myfifo, O_RDONLY); 

		// printf("About to read from pipe with descriptor %d\n",fd);
		// Read from FIFO 
		read(fd, arr1, sizeof(arr1)); 
		// printf("Read %s from pipe with descriptor %d\n",arr1,fd);

		// Print the read message 
		printf("User2: %s\n", arr1); 
		close(fd); 
	} 
	return 0; 
}