File bsc#1210857-0001-Low-daemons-pacemakerd-S-should-wait-for-shutdown-be.patch of Package pacemaker.29727

From 6ec6bac351b4eaf74e4abd76d172190d60d016b6 Mon Sep 17 00:00:00 2001
From: Chris Lumens <clumens@redhat.com>
Date: Mon, 1 May 2023 14:47:12 -0400
Subject: [PATCH] Low: daemons: pacemakerd -S should wait for shutdown before
 returning

Previously, `pacemakerd -S` would request a shutdown and then sit in a
loop for 30 minutes, waiting for the IPC connection to drop.  Only then
would it return to the command line.  This gave the user a way of
knowing the shutdown completed.

There are potentially various ways of solving this problem.  However, a
shutdown works by adding an event to the main loop which makes it
difficult to know exactly when it happens.  So, just go with the easiest
fix and re-implement the loop checking the IPC connection status.

Regression in 2.1.1 introduced by 64d4f9b5f
---
 daemons/pacemakerd/pacemakerd.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/daemons/pacemakerd/pacemakerd.c b/daemons/pacemakerd/pacemakerd.c
index cc55a6af1..9f77ccca2 100644
--- a/daemons/pacemakerd/pacemakerd.c
+++ b/daemons/pacemakerd/pacemakerd.c
@@ -337,9 +337,32 @@ main(int argc, char **argv)
         if (old_instance_connected) {
             rc = pcmk_pacemakerd_api_shutdown(old_instance, crm_system_name);
             pcmk_dispatch_ipc(old_instance);
-            pcmk_free_ipc_api(old_instance);
+
             exit_code = pcmk_rc2exitc(rc);
+
+            if (exit_code != CRM_EX_OK) {
+                pcmk_free_ipc_api(old_instance);
+                goto done;
+            }
+
+            /* We get the ACK immediately, and the response right after that,
+             * but it might take a while for pacemakerd to get around to
+             * shutting down.  Wait for that to happen (with 30-minute timeout).
+             */
+            for (int i = 0; i < 900; i++) {
+                if (!pcmk_ipc_is_connected(old_instance)) {
+                    exit_code = CRM_EX_OK;
+                    pcmk_free_ipc_api(old_instance);
+                    goto done;
+                }
+
+                sleep(2);
+            }
+
+            exit_code = CRM_EX_TIMEOUT;
+            pcmk_free_ipc_api(old_instance);
             goto done;
+
         } else {
             out->err(out, "Could not request shutdown "
                      "of existing Pacemaker instance: %s", pcmk_rc_str(rc));
-- 
2.35.3