/* isatty.c */
/* Dumb implementation so programs will at least run. */
#include <sys/stat.h>
int
_DEFUN(_isatty, (fd), int fd)
{
struct stat buf;
if (fstat (fd, &buf) < 0)
return 0;
if (S_ISCHR (buf.st_mode))
return 1;
}