X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=doc%2Fposix-functions%2Fgetgroups.texi;h=0e838f77cd17473c3130030c26120c483afa473b;hb=54b5ce0e1a4f6a4af37f970e45e6e173e5b0a1c6;hp=951705e8a522b4c70cc42bef2e5f7a2a9e8c7869;hpb=09ef7461110822a3970aa8eebcfaa740996a82f2;p=gnulib.git

diff --git a/doc/posix-functions/getgroups.texi b/doc/posix-functions/getgroups.texi
index 951705e8a..0e838f77c 100644
--- a/doc/posix-functions/getgroups.texi
+++ b/doc/posix-functions/getgroups.texi
@@ -12,10 +12,23 @@ 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}.
+@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