Addressing review comments

Author: rameshraghupathy

data/debian/sonic-host-services-data.gnoi-shutdown.service

@@ -6,7 +6,7 @@ After=network-online.target database.service
 
 [Service]
 Type=simple
-ExecStartPre=/usr/local/bin/check_platform.sh
+ExecStartPre=/usr/local/bin/check_platform.py
 ExecStartPre=/usr/local/bin/wait-for-sonic-core.sh
 ExecStart=/usr/local/bin/gnoi-shutdown-daemon
 Restart=always

scripts/check_platform.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+"""
+Check if the current platform is a SmartSwitch NPU (not DPU).
+Exit 0 if SmartSwitch NPU, exit 1 otherwise.
+"""
+import sys
+import subprocess
+
+def main():
+    try:
+        # Get subtype from config
+        result = subprocess.run(
+            ['sonic-cfggen', '-d', '-v', 'DEVICE_METADATA.localhost.subtype'],
+            capture_output=True,
+            text=True,
+            timeout=5
+        )
+        subtype = result.stdout.strip()
+        
+        # Check if DPU
+        try:
+            from utilities_common.chassis import is_dpu
+            is_dpu_platform = is_dpu()
+        except Exception:
+            is_dpu_platform = False
+        
+        # Check if SmartSwitch NPU (not DPU)
+        if subtype == "SmartSwitch" and not is_dpu_platform:
+            sys.exit(0)
+        else:
+            sys.exit(1)
+    except Exception:
+        sys.exit(1)
+
+if __name__ == "__main__":
+    main()

scripts/check_platform.sh

@@ -42,7 +42,7 @@
         'scripts/procdockerstatsd',
         'scripts/determine-reboot-cause',
         'scripts/process-reboot-cause',
-        'scripts/check_platform.sh',
+        'scripts/check_platform.py',
         'scripts/wait-for-sonic-core.sh',
         'scripts/sonic-host-server',
         'scripts/ldap.py'