터치 패널 디스크 온도 캐시 분리

touch_panel/rpi_disk_temp_cache.py

@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+import os
+import re
+import subprocess
+import time
+from pathlib import Path
+
+
+CACHE_FILE = Path("/run/control-rpi-disk-temp")
+DISK = "/dev/sda"
+INTERVAL_SECONDS = 5
+SMARTCTL = "/usr/sbin/smartctl"
+
+
+def parse_temp(output):
+    for line in output.splitlines():
+        stripped = line.strip()
+        if stripped.startswith("Temperature:"):
+            match = re.search(r"([0-9]+(?:\.[0-9]+)?)", stripped)
+            if match:
+                return float(match.group(1))
+        if "Temperature_Celsius" in stripped or "Airflow_Temperature_Cel" in stripped:
+            parts = stripped.split()
+            for part in reversed(parts):
+                if part.isdigit():
+                    return float(part)
+    return None
+
+
+def read_temp():
+    result = subprocess.run(
+        [SMARTCTL, "-A", "-d", "sntasmedia", DISK],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.DEVNULL,
+        text=True,
+        timeout=4,
+        check=False,
+    )
+    if result.returncode not in (0, 4, 64):
+        return None
+    return parse_temp(result.stdout)
+
+
+def write_cache(temp):
+    tmp = CACHE_FILE.with_suffix(".tmp")
+    if temp is None:
+        content = f"UPDATED={time.time():.3f}\nTEMP=\nOK=0\n"
+    else:
+        content = f"UPDATED={time.time():.3f}\nTEMP={temp:.1f}\nOK=1\n"
+    tmp.write_text(content, encoding="utf-8")
+    os.replace(tmp, CACHE_FILE)
+    os.chmod(CACHE_FILE, 0o644)
+
+
+def main():
+    while True:
+        try:
+            write_cache(read_temp())
+        except Exception:
+            write_cache(None)
+        time.sleep(INTERVAL_SECONDS)
+
+
+if __name__ == "__main__":
+    main()