/*
 * "Talk" to a file.  Two-process version.  This is useful for
 * talking to things in the portal filesystem or connected to
 * Unix domain sockets.
 *
 * Dan Cross <net!gajendra!cross>
 */

#include <fcntl.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int
main(int argc, char *argv[])
{
	pid_t pid;
	int fd, n;
	char buf[1024];

	if (argc != 2) {
		fprintf(stderr, "Usage: prog socket.\n");
		exit(EXIT_FAILURE);
	}
	fd = open(argv[1], O_RDWR);
	if (fd < 0) {
		perror(argv[1]);
		exit(EXIT_FAILURE);
	}
	pid = fork();
	if (pid < 0) {
		perror("fork");
		exit(EXIT_FAILURE);
	}
	if (pid == 0)
		while ((n = read(0, buf, sizeof buf)) > 0)
			write(fd, buf, n);
	else
		while ((n = read(fd, buf, sizeof buf)) > 0)
			write(1, buf, n);
	close(fd);

	return(EXIT_FAILURE);
}