X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=doc%2Fposix-functions%2Fgetgroups.texi;h=0e838f77cd17473c3130030c26120c483afa473b;hb=a155c5688ab059c1c2fff7f132116b455ddb37ba;hp=e503b222582782b0faa47c7f359235f1ec7baccb;hpb=867cf3bc81870ba2896b5c2098e76b458c057a14;p=gnulib.git

diff --git a/doc/posix-functions/getgroups.texi b/doc/posix-functions/getgroups.texi
index e503b2225..0e838f77c 100644
--- a/doc/posix-functions/getgroups.texi
+++ b/doc/posix-functions/getgroups.texi
@@ -18,8 +18,17 @@ FreeBSD 7.2.
 @item
 On Ultrix 4.3, @code{getgroups (0, NULL)} always fails.  See macro
 @samp{AC_FUNC_GETGROUPS}.
+@item
+On very old systems, this function operated on an array of @samp{int},
+even though that was a different size than an array of @samp{gid_t}.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+It is unspecified whether the effective group id will be included in
+the returned list, nor whether the list will be sorted in any
+particular order.  For that matter, some platforms include the
+effective group id twice, if it is also a member of the current
+supplemental group ids.
 @end itemize