1#include <utmp.h>
 2#include <sys/ioctl.h>
 3#include <unistd.h>
 4
 5int login_tty(int fd)
 6{
 7	setsid();
 8	if (ioctl(fd, TIOCSCTTY, (char *)0)) return -1;
 9	dup2(fd, 0);
10	dup2(fd, 1);
11	dup2(fd, 2);
12	if (fd>2) close(fd);
13	return 0;
14}