@node ttyname_r
@section @code{ttyname_r}
@findex ttyname_r

POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/ttyname_r.html}

Gnulib module: ttyname_r

Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
NetBSD 3.0, mingw, BeOS.
@item
This function has an incompatible declaration on some platforms:
MacOS X 10.4, Solaris 11 2010-11 (when @code{_POSIX_PTHREAD_SEMANTICS} is not defined).
@item
This function refuses to do anything when the output buffer is less than 128
bytes large, on some platforms:
Solaris 11 2010-11.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@end itemize