updates to force CoreCommandError to contain string values for stderr and stdout, couple bugfixes in handling bad commands when using execute commands from tlv based api or coresendmsg, also updates to coresendmsg to display everything in lowercase to mimic previous look and feel, however coresendmg will now work regardless of casing to avoid breaking things again

daemon/core/utils.py

@@ -231,14 +231,17 @@ def cmd(
         p = Popen(args, stdout=PIPE, stderr=PIPE, env=env, cwd=cwd, shell=shell)
         if wait:
             stdout, stderr = p.communicate()
+            stdout = stdout.decode("utf-8").strip()
+            stderr = stderr.decode("utf-8").strip()
             status = p.wait()
             if status != 0:
                 raise CoreCommandError(status, args, stdout, stderr)
-            return stdout.decode("utf-8").strip()
+            return stdout
         else:
             return ""
-    except OSError:
-        raise CoreCommandError(-1, args)
+    except OSError as e:
+        logging.error("cmd error: %s", e.strerror)
+        raise CoreCommandError(1, args, "", e.strerror)
 
 
 def file_munge(pathname: str, header: str, text: str) -> None: