From a1a1d1c6cf0ae302f76bc39a3d83aba66aee3228 Mon Sep 17 00:00:00 2001
From: John Crispin <john@phrozen.org>
Date: Sun, 15 May 2016 16:18:41 +0200
Subject: [PATCH] preinit: create a sentinel file during preinit

Signed-off-by: John Crispin <john@phrozen.org>
---
 initd/preinit.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/initd/preinit.c b/initd/preinit.c
index f38d8ef..51fde31 100644
--- a/initd/preinit.c
+++ b/initd/preinit.c
@@ -15,6 +15,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/mount.h>
+#include <fcntl.h>
 
 #include <libubox/uloop.h>
 #include <libubox/utils.h>
@@ -64,6 +65,7 @@ spawn_procd(struct uloop_process *proc, int ret)
 
 	unsetenv("INITRAMFS");
 	unsetenv("PREINIT");
+	unlink("/tmp/.preinit");
 	DEBUG(2, "Exec to real procd now\n");
 	if (wdt_fd)
 		setenv("WDTFD", wdt_fd, 1);
@@ -104,6 +106,7 @@ preinit(void)
 	uloop_process_add(&plugd_proc);
 
 	setenv("PREINIT", "1", 1);
+	creat("/tmp/.preinit", 0600);
 
 	preinit_proc.cb = spawn_procd;
 	preinit_proc.pid = fork();
-- 
2.25.1