- return __ptsname_r (fd, buffer, sizeof (buffer)) != 0 ? NULL : buffer;
-}
-
-
-/* Store at most BUFLEN characters of the pathname of the slave pseudo
- terminal associated with the master FD is open on in BUF.
- Return 0 on success, otherwise an error number. */
-static int
-__ptsname_r (int fd, char *buf, size_t buflen)
-{
- int save_errno = errno;
- struct stat st;
-
- if (buf == NULL)
- {
- __set_errno (EINVAL);
- return EINVAL;
- }
-
- if (!__isatty (fd))
- /* We rely on isatty to set errno properly (i.e. EBADF or ENOTTY). */
- return errno;
-
- if (buflen < strlen (_PATH_TTY) + 3)
- {
- __set_errno (ERANGE);
- return ERANGE;
- }
-
- if (__ttyname_r (fd, buf, buflen) != 0)
- return errno;
-
- buf[sizeof (_PATH_DEV) - 1] = 't';
-
- if (__stat (buf, &st) < 0)
- return errno;
-
- __set_errno (save_errno);
- return 0;