@node ptsname_r
@subsection @code{ptsname_r}
@findex ptsname_r

Gnulib module: ptsname_r

Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8,
AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11.4, Cygwin 1.7.9, mingw,
MSVC 14, BeOS.
@item
This function is not declared unless @code{_REENTRANT} is defined,
on some platforms:
OSF/1 5.1.
@item
This function has an incompatible declaration on some platforms:
OSF/1 5.1.
@item
When this functions fails, it returns -1 instead of the error code
on some platforms:
Android 4.3.
@end itemize

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

Note: Portable programs should expect to find the error code as the
return value of this function, not as the value of @code{errno}.
This is needed for compatibility with musl libc and with the
forthcoming POSIX Issue 8.