1 files changed, 11 insertions, 14 deletions
diff --git a/lib/libsys/getgroups.2 b/lib/libsys/getgroups.2
index 4881a65d532e..4e94b32d4e7b 100644
--- a/lib/libsys/getgroups.2
+++ b/lib/libsys/getgroups.2
@@ -33,7 +33,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd September 17, 2025
+.Dd October 10, 2025
 .Dt GETGROUPS 2
 .Os
 .Sh NAME
@@ -107,10 +107,8 @@ array.
 The
 .Fn getgroups
 system call conforms to
-.St -p1003.1-2008
-with the additional properties that supplementary groups are reported in
-strictly ascending order and the returned size coincides with the cardinal of
-the set.
+.St -p1003.1-2008 ,
+not reporting the effective group ID.
 .Sh HISTORY
 The
 .Fn getgroups
@@ -121,8 +119,8 @@ Since
 .Fx 14.3 ,
 the
 .Fn getgroups
-system call has treated the supplementary groups as a set, reporting them in
-strictly ascending order and returning the cardinal of the set.
+system call has been reporting the supplementary groups in strictly ascending
+order.
 .Pp
 Before
 .Fx 15.0 ,
@@ -138,15 +136,14 @@ system call gets the supplementary groups set in the
 array.
 In particular, as evoked in
 .Sx HISTORY ,
-it does not anymore retrieve the effective GID in the first slot of
+it does not anymore retrieve the effective group ID in the first slot of
 .Fa gidset .
-Programs should not make any assumption about which group is placed in the first
-slot of
-.Fa gidset
-other than it being the supplementary group with smallest GID.
+Programs that process this slot in a specific way must be modified to obtain the
+effective group ID through other means, such as a call to
+.Xr getegid 2 .
 .Pp
-The effective GID is present in the supplementary groups set if and only if it
-was explicitly set as a supplementary group.
+The effective group ID is present in the supplementary groups set if and only if
+it was explicitly set as a supplementary group.
 The function
 .Fn initgroups
 enforces that, while the