Fix compatibility issues in python 3.5

files/check_borgmatic

@@ -23,8 +23,8 @@ info_cache_file = "/tmp/check_borgmatic_info_cache"
 
 def get_cached_cmd(cmd, cache_file_path, age_max):
     if age_max == 0:
-        result = subprocess.run(cmd, shell=True, capture_output=True, text=True)
-        return result.stdout
+        (retcode, result) = subprocess.getstatusoutput(cmd)
+        return result
 
     else:
         renew_cache = True
@@ -37,7 +37,7 @@ def get_cached_cmd(cmd, cache_file_path, age_max):
 
         if renew_cache:
             cmd = "%s > %s" % (cmd, cache_file_path)
-            subprocess.check_output(cmd, shell=True)
+            (retcode, result) = subprocess.getstatusoutput(cmd)
 
         return open(cache_file_path, "r").read()
 
@@ -137,7 +137,7 @@ def main():
                 % (last_date, args.warning_age, perf_data_string)
             )
             ret = OK
-    except:
+    except Exception as e:
         print("UNKNOWN - Unable to retrieve borgmatic information")
         ret = UNKNOWN