File 2925-stdlib-Fix-ancestors-for-group-and-shell.patch of Package erlang

From 516b3bfebb16116f93856c134d0c19fba0492f9f Mon Sep 17 00:00:00 2001
From: Lukas Larsson <lukas@erlang.org>
Date: Wed, 8 Jun 2022 21:28:04 +0200
Subject: [PATCH 05/34] stdlib: Fix ancestors for group and shell

This makes observer better at drawing the application tree
---
 lib/kernel/src/group.erl | 11 ++++++++---
 lib/stdlib/src/shell.erl |  9 ++++++++-
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/lib/kernel/src/group.erl b/lib/kernel/src/group.erl
index f8ce13e947..73434984f1 100644
--- a/lib/kernel/src/group.erl
+++ b/lib/kernel/src/group.erl
@@ -21,16 +21,21 @@
 
 %% A group leader process for user io.
 
--export([start/2, start/3, server/3]).
+-export([start/2, start/3, server/4]).
 
 start(Drv, Shell) ->
     start(Drv, Shell, []).
 
 start(Drv, Shell, Options) ->
-    spawn_link(group, server, [Drv, Shell, Options]).
+    Ancestors = [self() | case get('$ancestors') of
+                              undefined -> [];
+                              Anc -> Anc
+                          end],
+    spawn_link(group, server, [Ancestors, Drv, Shell, Options]).
 
-server(Drv, Shell, Options) ->
+server(Ancestors, Drv, Shell, Options) ->
     process_flag(trap_exit, true),
+    _ = [put('$ancestors', Ancestors) || Shell =/= {}],
     edlin:init(),
     put(line_buffer, proplists:get_value(line_buffer, Options, group_history:load())),
     put(read_mode, list),
diff --git a/lib/stdlib/src/shell.erl b/lib/stdlib/src/shell.erl
index c3d9c83a66..c62d5a45d2 100644
--- a/lib/stdlib/src/shell.erl
+++ b/lib/stdlib/src/shell.erl
@@ -59,7 +59,14 @@ start(NoCtrlG) ->
 
 start(NoCtrlG, StartSync) ->
     _ = code:ensure_loaded(user_default),
-    spawn(fun() -> server(NoCtrlG, StartSync) end).
+    Ancestors = [self() | case get('$ancestors') of
+                              undefined -> [];
+                              Anc -> Anc
+                          end],
+    spawn(fun() ->
+                  put('$ancestors', Ancestors),
+                  server(NoCtrlG, StartSync)
+          end).
 
 %% Call this function to start a user restricted shell 
 %% from a normal shell session.
-- 
2.35.3