br: fix br integration test file corruption (#56799)

close #53835

br/tests/br_pitr/run.sh

@@ -172,32 +172,49 @@ fi
 echo "restart a services"
 restart_services
 
-echo "corrupt a log file"
-filename=$(find $TEST_DIR/$PREFIX/log -regex ".*\.log" | grep -v "schema-meta" | tail -n 1)
-filename_temp=$filename"_temp"
-filename_bak=$filename"_bak"
-echo "corruption" > $filename_temp
-cat $filename >> $filename_temp
+file_corruption() {
+    echo "corrupt the whole log files"
+    for filename in $(find $TEST_DIR/$PREFIX/log -regex ".*\.log" | grep -v "schema-meta"); do
+        echo "corrupt the log file $filename"
+        filename_temp=$filename"_temp"
+        echo "corruption" > $filename_temp
+        cat $filename >> $filename_temp
+        mv $filename_temp $filename
+        truncate -s -11 $filename
+    done
+}
 
-# file lost
-mv $filename $filename_bak
+# file corruption
+file_corruption
 export GO_FAILPOINTS="github.com/pingcap/tidb/br/pkg/utils/set-import-attempt-to-one=return(true)"
 restore_fail=0
 run_br --pd $PD_ADDR restore point -s "local://$TEST_DIR/$PREFIX/log" --full-backup-storage "local://$TEST_DIR/$PREFIX/full" || restore_fail=1
 export GO_FAILPOINTS=""
 if [ $restore_fail -ne 1 ]; then
-    echo 'pitr success on file lost'
+    echo 'pitr success on file corruption'
     exit 1
 fi
 
-# file corruption
-mv $filename_temp $filename
-truncate --size=-11 $filename
+# start a new cluster for corruption
+echo "restart a services"
+restart_services
+
+file_lost() {
+    echo "lost the whole log files"
+    for filename in $(find $TEST_DIR/$PREFIX/log -regex ".*\.log" | grep -v "schema-meta"); do
+        echo "lost the log file $filename"
+        filename_temp=$filename"_temp"
+        mv $filename $filename_temp
+    done
+}
+
+# file lost
+file_lost
 export GO_FAILPOINTS="github.com/pingcap/tidb/br/pkg/utils/set-import-attempt-to-one=return(true)"
 restore_fail=0
 run_br --pd $PD_ADDR restore point -s "local://$TEST_DIR/$PREFIX/log" --full-backup-storage "local://$TEST_DIR/$PREFIX/full" || restore_fail=1
 export GO_FAILPOINTS=""
 if [ $restore_fail -ne 1 ]; then
-    echo 'pitr success on file corruption'
+    echo 'pitr success on file lost'
     exit 1
 fi