[RFC PATCH] scripts: coccicheck: Improve error feedback when coccicheck fails

[Sumera Priyadarsini <sylphrenadin@gmail.com>]

Currently, coccicheck fails with only the message "coccicheck failed"
and the error code for the failure. To obtain the error logs,
one needs to specify a debug file using the DEBUG_FILE option.

Modify coccicheck to display error logs when it crashes unless
DEBUG_FILE is set, in which case, the error logs are stored in
the specified debug file.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
---
 scripts/coccicheck | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/scripts/coccicheck b/scripts/coccicheck
index e04d328210ac..dbeafa21f359 100755
--- a/scripts/coccicheck
+++ b/scripts/coccicheck
@@ -126,8 +126,14 @@ run_cmd_parmap() {
 	if [ $VERBOSE -ne 0 ] ; then
 		echo "Running ($NPROC in parallel): $@"
 	fi
-	echo $@ >>$DEBUG_FILE
-	$@ 2>>$DEBUG_FILE
+	if [ "$DEBUG_FILE" != "/dev/null" -a "$DEBUG_FILE" != "" ]; then
+                echo $@>>$DEBUG_FILE
+                $@ 2>>$DEBUG_FILE
+        else
+                echo $@
+                $@ 2>&1
+	fi
+
 	err=$?
 	if [[ $err -ne 0 ]]; then
 		echo "coccicheck failed"
-- 
2.25.1