check for a loaded kernel on reboot

Explicitly pass "kexec" to the shutdown script if we detect a preloaded
kernel already in memory. We mask read errors for custom kernels where
kexec is not available.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/rc.shutdown b/rc.shutdown
index d0d8405..78f56c4 100755
--- a/rc.shutdown
+++ b/rc.shutdown
@@ -82,7 +82,12 @@ if [[ -x /run/initramfs/shutdown ]]; then
 	if [[ $RUNLEVEL = 0 ]]; then
 		action="poweroff"
 	else
-		action="reboot"
+		{ read kexec_loaded </sys/kernel/kexec_loaded; } 2>/dev/null
+		if (( kexec_loaded )); then
+			action="kexec"
+		else
+			action="reboot"
+		fi
 	fi
 
 	# make /run/initrafs a mount