From 5b385cbd0ccc3985724c500fb823a722b07f0e8f Mon Sep 17 00:00:00 2001
From: Kenneth Dsouza <kdsouza@redhat.com>
Date: Wed, 15 Aug 2018 18:44:15 +0530
Subject: [PATCH] kdumpctl: Print warning in case the raw device is formatted
 and contains filesystem.

Currently the kdumpctl script doesn't check if the raw device is
formatted which might destroy existing data at the time of dump
capture.

This patch addresses this issue, by ensuring kdumpctl prints
a warning in case it finds the raw device to be formatted.

Signed-off-by: Kenneth D'souza <kdsouza@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
---
 kdumpctl | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/kdumpctl b/kdumpctl
index e07ec06..ece406f 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -786,6 +786,11 @@ save_raw()
 		echo "raw partition $raw_target not found"
 		return 1
 	}
+	check_fs=$(lsblk --nodeps -npo FSTYPE $raw_target)
+	if [[ $(echo $check_fs | wc -w) -ne 0 ]]; then
+		echo "Warning: Detected '$check_fs' signature on $raw_target, data loss is expected."
+		return 0
+	fi
 	kdump_dir=`grep ^path $KDUMP_CONFIG_FILE | cut -d' '  -f2-`
 	if [ -z "${kdump_dir}" ]; then
 		coredir="/var/crash/`date +"%Y-%m-%d-%H:%M"`"