9.349 getlogin_r

POSIX specification:
http://www.opengroup.org/onlinepubs/9699919799/functions/getlogin_r.html

Gnulib module: getlogin_r

Portability problems fixed by Gnulib:

• This function is missing on some platforms: NetBSD 3.0, Minix 3.1.8, mingw, MSVC 9.
• This function is not declared unless _REENTRANT is defined, on some platforms: HP-UX 11.
• This function returns a truncated result, instead of failing with error code ERANGE, when the buffer is not large enough, on some platforms: OSF/1 5.1.

Portability problems not fixed by Gnulib:

• This function has an incompatible declaration on some platforms: Solaris 11 2011-11 (when _POSIX_PTHREAD_SEMANTICS is not defined).
• This function fails even when standard input is a tty on some platforms: HP-UX 11.11.
• This function fails with error code EINVAL instead of ERANGE when the second argument is zero on some platforms: HP-UX 11.31.