From 01595b35d598ca37cc4a4823d11ce1a9404f58e8 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 21 May 2012 20:00:58 +0200
Subject: [PATCH] util: rework in_initrd() logic

Checking the device major/minor is not a good idea. Let's replace this
with an explicit flag file, which we model after /etc/os-release and
call /etc/initrd-release.
(cherry picked from commit 8f33b5b8b3e85f9c3b00eb004e601f7a72fa6461)

Conflicts:
	TODO
---
 src/shared/util.c |   16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/src/shared/util.c b/src/shared/util.c
index 83b4a24..aef6ebd 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -5654,16 +5654,10 @@ bool is_valid_documentation_url(const char *url) {
 }
 
 bool in_initrd(void) {
-        static bool checked=false;
-        static bool is_in_initrd=false;
-
-        if (!checked) {
-                struct stat sb;
-                if (stat("/", &sb) == 0) {
-                        is_in_initrd = (sb.st_dev == 1);
-                        checked = true;
-                }
-        }
+        static int saved = -1;
+
+        if (saved < 0)
+                saved = access("/etc/initrd-release", F_OK) >= 0;
 
-        return is_in_initrd;
+        return saved;
 }