Retro68/gcc/newlib/libc/posix/_isatty.c

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2017-04-11 21:13:36 +00:00
/* isatty.c */
/* Dumb implementation so programs will at least run. */
#include <sys/stat.h>
#include <errno.h>
int
_DEFUN(_isatty, (fd), int fd)
{
struct stat buf;
if (fstat (fd, &buf) < 0) {
errno = EBADF;
return 0;
}
if (S_ISCHR (buf.st_mode))
return 1;
errno = ENOTTY;
return 0;
}