[PATCH] image: check if the file is core dump

[Zhibin Dong <developerdong@gmail.com>]

The previous code does a wrong judgement in two cases:
1. a file is suffixed by .core but is not a core dump file
2. a file is a core dump file but is not suffixed by .core

The new code uses `file` to determine the type of files, which is more
accurate.

Signed-off-by: Zhibin Dong <zhibin.dong@siemens.com>
---
 meta/classes/image.bbclass | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index 98741da0..10923947 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -444,7 +444,7 @@ EOSUDO
 
     # Sometimes qemu-user-static generates coredumps in chroot, move them
     # to work temporary directory and inform user about it.
-    for f in $(sudo find ${ROOTFSDIR} -type f -name *.core); do
+    for f in $(sudo find ${ROOTFSDIR} -type f -exec file {} \; | grep 'core file' | cut -d: -f1); do
         sudo mv "${f}" "${WORKDIR}/temp/"
         bbwarn "found core dump in rootfs, check it in ${WORKDIR}/temp/${f##*/}"
     done
-- 
2.39.2