From 507f89a83ad6ac005d67028438aa741f6d62a3ce Mon Sep 17 00:00:00 2001
From: Euler Taveira <euler@eulerto.com>
Date: Thu, 17 Jul 2025 11:58:43 -0300
Subject: [PATCH 3/4] fixup! Create a separate file listing backend types

---
 src/backend/postmaster/launch_backend.c              |  2 +-
 src/backend/utils/init/miscinit.c                    |  2 +-
 .../postmaster/{proctype_list.h => proctypelist.h}   | 12 +++++++++---
 3 files changed, 11 insertions(+), 5 deletions(-)
 rename src/include/postmaster/{proctype_list.h => proctypelist.h} (84%)

diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index d8ac514bbbc..8b2f1a0cf41 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -179,7 +179,7 @@ typedef struct
 static child_process_kind child_process_kinds[] = {
 #define PG_PROCTYPE(bktype, description, main_func, shmem_attach) \
 	[bktype] = {description, main_func, shmem_attach},
-#include "postmaster/proctype_list.h"
+#include "postmaster/proctypelist.h"
 #undef PG_PROCTYPE
 };
 
diff --git a/src/backend/utils/init/miscinit.c b/src/backend/utils/init/miscinit.c
index 53a232cee41..dec220a61f5 100644
--- a/src/backend/utils/init/miscinit.c
+++ b/src/backend/utils/init/miscinit.c
@@ -268,7 +268,7 @@ GetBackendTypeDesc(BackendType backendType)
 	{
 #define PG_PROCTYPE(bktype, description, main_func, shmem_attach) \
 		case bktype: backendDesc = gettext_noop(description); break;
-#include "postmaster/proctype_list.h"
+#include "postmaster/proctypelist.h"
 #undef PG_PROCTYPE
 	}
 	return backendDesc;
diff --git a/src/include/postmaster/proctype_list.h b/src/include/postmaster/proctypelist.h
similarity index 84%
rename from src/include/postmaster/proctype_list.h
rename to src/include/postmaster/proctypelist.h
index 749a6db8364..2626e7a5ac5 100644
--- a/src/include/postmaster/proctype_list.h
+++ b/src/include/postmaster/proctypelist.h
@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * proctype_list.h
+ * proctypelist.h
  *
  * The list of process types is kept on its own source file for use by
  * automatic tools.  The exact representation of a process type is
@@ -11,12 +11,18 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  src/include/postmaster/proctype_list.h
+ *	  src/include/postmaster/proctypelist.h
  *
  *-------------------------------------------------------------------------
  */
 
-/* there is deliberately not an #ifndef PROCTYPE_LIST_H here */
+/* there is deliberately not an #ifndef PROCTYPELIST_H here */
+
+/*
+ * WAL senders start their life as regular backend processes, and change their
+ * type after authenticating the client for replication.  We list it here for
+ * PostmasterChildName() but cannot launch them directly.
+ */
 
 /*
  * List of process types (symbol, description, Main function, shmem_attach)
-- 
2.39.5