From 7b86f845febc3b375bb02008a456a5514a9396c9 Mon Sep 17 00:00:00 2001
From: cperciva <cperciva@FreeBSD.org>
Date: Thu, 8 Oct 2015 15:48:44 +0000
Subject: MFC r288446: Disable suspend during shutdown.

---
 sbin/init/init.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'sbin/init/init.c')

diff --git a/sbin/init/init.c b/sbin/init/init.c
index 99041c9..e6f567c 100644
--- a/sbin/init/init.c
+++ b/sbin/init/init.c
@@ -1499,6 +1499,15 @@ static state_func_t
 death(void)
 {
 	session_t *sp;
+	int block, blocked;
+	size_t len;
+
+	/* Temporarily block suspend. */
+	len = sizeof(blocked);
+	block = 1;
+	if (sysctlbyname("kern.suspend_blocked", &blocked, &len,
+	    &block, sizeof(block)) == -1)
+		blocked = 0;
 
 	/*
 	 * Also revoke the TTY here.  Because runshutdown() may reopen
@@ -1515,6 +1524,11 @@ death(void)
 	/* Try to run the rc.shutdown script within a period of time */
 	runshutdown();
 
+	/* Unblock suspend if we blocked it. */
+	if (!blocked)
+		sysctlbyname("kern.suspend_blocked", NULL, NULL,
+		    &blocked, sizeof(blocked));
+
 	return (state_func_t) death_single;
 }
 
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