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@node getlogin_r
@section @code{getlogin_r}
@findex getlogin_r
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/getlogin_r.html}
Gnulib module: getlogin_r
Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
NetBSD 3.0, Minix 3.1.8, mingw, MSVC 9.
@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
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