From 89c7c6ea6ef12722eac31c18b8fa6fbcf429525b Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Wed, 20 Jul 2022 16:55:02 +0200
Subject: [PATCH] sulogin: fix includes

* support --enable-sulogin-emergency-mount on Linux only

* don't include unnecessary linux/magic.h

* don't include linux/fs.h, sys/mount.h should be enough, otherwise
  define a fallback for MS_RELATIME

Reported-by: Andreas Schwab <schwab@suse.de>
Signed-off-by: Karel Zak <kzak@redhat.com>
---
 configure.ac                   | 2 ++
 login-utils/sulogin-consoles.c | 7 ++++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index 824e8bbd2..51deeecd4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2615,6 +2615,8 @@ AC_ARG_ENABLE([sulogin-emergency-mount],
 )
 
 AS_IF([test "x$enable_sulogin_emergency_mount" = xyes], [
+  AS_IF([test "x$linux_os" = xyes], [ ],
+	[AC_MSG_ERROR([--enable-sulogin-emergency-mount selected for non-linux system])])
   AC_DEFINE([USE_SULOGIN_EMERGENCY_MOUNT], [1],
 	    [Should sulogin use an emergency mount of /dev and /proc?])
 ])
diff --git a/login-utils/sulogin-consoles.c b/login-utils/sulogin-consoles.c
index 9ae4b2eba..9ae525556 100644
--- a/login-utils/sulogin-consoles.c
+++ b/login-utils/sulogin-consoles.c
@@ -41,10 +41,11 @@
 #include <fcntl.h>
 #include <unistd.h>
 
-#ifdef USE_SULOGIN_EMERGENCY_MOUNT
+#if defined(USE_SULOGIN_EMERGENCY_MOUNT)
 # include <sys/mount.h>
-# include <linux/fs.h>
-# include <linux/magic.h>
+# ifndef MS_RELATIME
+#  define MS_RELATIME  (1<<21)
+# endif
 # ifndef MNT_DETACH
 #  define MNT_DETACH   2
 # endif
-- 
2.37.1