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@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, Minix 3.1.8, mingw, MSVC 14.
@item
This function is not declared unless @code{_REENTRANT} is defined,
on some platforms:
HP-UX 11.
@item
This function has an incompatible declaration on some platforms:
Solaris 11.4 (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.
@item
This function is just a stub that produces an error message on standard error
on some platforms:
Android 4.3.
@end itemize

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