getgroups: work around FreeBSD bug

[gnulib.git] / doc / posix-functions / getgroups.texi

diff --git a/doc/posix-functions/getgroups.texi b/doc/posix-functions/getgroups.texi
index 951705e..e503b22 100644 (file)
--- a/doc/posix-functions/getgroups.texi
+++ b/doc/posix-functions/getgroups.texi
@@ -12,7 +12,11 @@ Portability problems fixed by Gnulib:
 This function is missing on some platforms:
 mingw.
 @item
-On Ultrix 4.3, @code{getgroups (0, 0)} always fails.  See macro
+On some platforms, this function fails to reject a negative count,
+even though that is less than the size that would be returned:
+FreeBSD 7.2.
+@item
+On Ultrix 4.3, @code{getgroups (0, NULL)} always fails.  See macro
 @samp{AC_FUNC_GETGROUPS}.
 @end itemize