@section @code{getlogin_r}
@findex getlogin_r
-POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/getlogin_r.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/getlogin_r.html}
Gnulib module: getlogin_r
@item
This function is missing on some platforms:
NetBSD 3.0, mingw.
+@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 2010-11 (when @code{_POSIX_PTHREAD_SEMANTICS} is not defined).
+@item
+This function returns a truncated result, instead of failing with error code
+@code{ERANGE}, when the buffer is not large enough, on some platforms:
+OSF/1 5.1.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
+@item
+This function fails even when standard input is a tty on some platforms:
+HP-UX 11.11.
+@item
+This function fails with error code @code{EINVAL} instead of @code{ERANGE} when
+the second argument is zero on some platforms:
+HP-UX 11.31.
@end itemize