Only call gpt under macOS

scripts/wk/hw/diags.py

@@ -6,6 +6,7 @@ import atexit
 import logging
 import os
 import pathlib
+import platform
 import subprocess
 import time
 
@@ -281,11 +282,12 @@ class State():
         for test in disk.tests:
           _f.write(f'\n{test.name}:\n')
           _f.write('\n'.join(debug.generate_object_report(test, indent=1)))
-      cmd = [(
-        f'sudo gpt -r show "{disk.path}"'
-        f' >> {debug_dir}/gpt_{disk.path.name}.info'
-        )]
-      exe.run_program(cmd, check=False, shell=True)
+      if platform.system() == 'Darwin':
+        cmd = [(
+          f'sudo gpt -r show "{disk.path}"'
+          f' >> {debug_dir}/gpt_{disk.path.name}.info'
+          )]
+        exe.run_program(cmd, check=False, shell=True)
 
     # osTicket
     with open(f'{debug_dir}/osTicket.report', 'a', encoding='utf-8') as _f: