A test/gather-battery-data.py

@@ -0,0 +1,45 @@ 
+#!/usr/bin/env python
+
+import os
+import os.path
+import tarfile
+try:
+  from StringIO import StringIO
+except ImportError:
+  from io import StringIO
+
+
+class TarWriter:
+  def __init__(self, out_name):
+    print("Creating: " + out_name)
+    self.tar = tarfile.open(out_name, "w")
+
+  def add(self, path):
+    print("Adding: " + path)
+    if os.path.isfile(path):
+      metadata = self.tar.gettarinfo(path)
+      try:
+        with open(path) as f:
+          buf = f.read()
+          fbuf = StringIO(buf)
+          metadata.size = len(buf)
+          self.tar.addfile(metadata, fbuf)
+          fbuf.close()
+      except:
+        fbuf = StringIO()
+        metadata.size = 0
+        self.tar.addfile(metadata, fbuf)
+        fbuf.close()
+
+  def close(self):
+    self.tar.close()
+
+
+writer = TarWriter("battery.tar")
+for root, dirs, files in os.walk("/sys/class/power_supply"):
+  for device in dirs:
+    for root2, dirs2, files2 in os.walk(root + "/" + device):
+      for f in files2:
+        writer.add(root2 + "/" + f)
+writer.close()
+print("Finished.")