From 450873c962a1323807e934546f04894010bf8843 Mon Sep 17 00:00:00 2001
From: Ira Weiny <ira.weiny@intel.com>
Date: Mon, 23 Sep 2019 10:53:28 -0700
Subject: [PATCH] generic/131: Save stderr for debugging

Details of which internal step failed within a test are lost without
additional debugging output.  Save that output by separating stdout and
stderr.

This allows the server port to be written solely to stdout for
consumption by the script.  Then all error output can be sent to the
seqres.full file in the event of a failure.  Then, depend on the return
code of the server _and_ the client to detect failure and save the error
output for inspection.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
---
 tests/generic/131 | 63 +++++++++++++++++++++++++++++++++--------------
 1 file changed, 45 insertions(+), 18 deletions(-)

diff --git a/tests/generic/131 b/tests/generic/131
index c333e676..4d90411d 100755
--- a/tests/generic/131
+++ b/tests/generic/131
@@ -14,11 +14,15 @@ here=`pwd`
 tmp=/tmp/$$
 status=1	# failure is the default!
 trap "_cleanup; exit \$status" 0 1 2 3 15
+debug="-d"
+
+TESTFILE=$TEST_DIR/lock_file
 
 _cleanup()
 {
 	kill $client_pid > /dev/null 2>&1
 	kill $server_pid > /dev/null 2>&1
+	rm -f $TESTFILE
 }
 
 # get standard environment, filters and checks
@@ -31,48 +35,71 @@ _supported_os Linux
 _require_test
 _require_test_fcntl_advisory_locks
 
-TESTFILE=$TEST_DIR/lock_file
+# set up log files
+SERVER_LOG=$TEST_DIR/server.out
+rm -f $SERVER_LOG
+touch $SERVER_LOG
+SERVER_PORT=$TEST_DIR/server.port
+rm -f $SERVER_PORT
+touch $SERVER_PORT
+CLIENT_LOG=$TEST_DIR/client.out
+rm -f $CLIENT_LOG
+touch $CLIENT_LOG
+
+touch $TESTFILE
+
+function dump_logs_fail()
+{
+	fail_str=$1
 
-rm -f $TEST_DIR/server.out
-touch $TEST_DIR/server.out
+	echo "     ***** Client log *****" >> $seqres.full
+	cat $CLIENT_LOG >> $seqres.full
+	echo "     ***** Server log *****" >> $seqres.full
+	cat $SERVER_LOG >> $seqres.full
+	echo "     ***** End file details *****" >> $seqres.full
+	ls -la $TESTFILE >> $seqres.full
+	_fail $fail_str
+	exit 1
+}
 
 # Start the server
-src/locktest $TESTFILE 2>&1 > $TEST_DIR/server.out &
+src/locktest $debug $TESTFILE 2> $SERVER_LOG 1> $SERVER_PORT &
 server_pid=$!
 
 timeout=30
 while [ $timeout -gt 0 ]; do
 	sleep 1
 
-	PORT=$(cat $TEST_DIR/server.out | grep "^server port: " | awk '{print $3}')
+	PORT=$(cat $SERVER_PORT | grep "^server port: " | awk '{print $3}')
 	if [ -n "$PORT" ]; then
 		break
 	fi
 
 	# check the existence of server process
 	if ! kill -s 0 $server_pid >/dev/null 2>&1; then
-		echo "Server died abnormally"
-		exit 1
+		dump_logs_fail "Server died abnormally"
 	fi
 
 	let timeout=timeout-1
 done
 
 if [ -z "$PORT" ]; then
-	echo "Could not get server port"
-	exit 1
+	dump_logs_fail "Could not get server port"
 fi
 
 # Start the client
-src/locktest -p $PORT -h localhost $TESTFILE 2>&1 > $TEST_DIR/client.out
+
+src/locktest $debug -p $PORT -h localhost $TESTFILE 2> $CLIENT_LOG
+client_result=$?
 client_pid=$!
-result=$?
-if [ $result -eq 0 ]; then
-	echo success!
-	status=0
-else
-	echo "Client reported failure ($result)"
-	cat $TEST_DIR/*.out
+if [ $client_result -ne 0 ]; then
+	dump_logs_fail "Client reported failure ($client_result)"
 fi
-
+wait $server_pid
+server_result=$?
+if [ $server_result -ne 0 ]; then
+	dump_logs_fail "Server reported failure ($server_result)"
+fi
+echo success!
+status=0
 exit
-- 
2.39.5