basic parsing

.gitignore

@@ -0,0 +1 @@
+results/*

smart_stats

@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+
+import json
+import os
+import pprint
+import subprocess
+import sys
+
+def do(cmd):
+    p = subprocess.run(cmd, check=False, capture_output=True, encoding='UTF-8')
+    return (p.stdout, p.stderr, p.returncode)
+
+
+def get_drives():
+    drives = []
+    cmd = ['lsblk', '-J']
+    stdout, stderr, exit_code = do(cmd)
+    if stderr or exit_code != 0:
+        sys.exit(f'error: {stderr}')
+    drive_data = json.loads(stdout)
+    try:
+        bds = drive_data['blockdevices']
+    except KeyError:
+        sys.exit('No fucking drives')
+    for drive in bds:
+        drives.append(drive['name'])
+    return drives
+
+
+# TODO(luket): add exit code parsing
+#
+# Bit 0: Command line did not parse.
+# Bit 1: Device open failed, device did not return an IDENTIFY DEVICE structure, or device is in a low-power mode (see '-n' option above).
+# Bit 2: Some SMART or other ATA command to the disk failed, or there was a checksum error in a SMART data structure (see '-b' option above).
+# Bit 3: SMART status check returned "DISK FAILING".
+# Bit 4: We found prefail Attributes <= threshold.
+# Bit 5: SMART status check returned "DISK OK" but we found that some (usage or prefail) Attributes have been <= threshold at some time in the past.
+# Bit 6: The device error log contains records of errors.
+# Bit 7: The device self-test log contains records of errors.  [ATA only] Failed self-tests outdated by a newer successful extended self-test are ignored.
+
+def get_smart(drives):
+    if os.getuid() != 0:
+        sys.exit('Need to be root to get smart.')
+    for drive in drives:
+        drive_path = f'/dev/{drive}'
+        cmd = ['/usr/bin/smartctl', '--json', '-a', drive_path]
+        stdout, stderr, exit_code = do(cmd)
+        drive_data = json.loads(stdout)
+        pprint.pprint(drive_data)
+
+
+def main():
+    get_smart(get_drives())
+
+if __name__ == '__main__':
+    main()