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diff --git a/bin/tpm-sysfs-resource b/bin/tpm-sysfs-resource
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+#!/usr/bin/env python3
+# Copyright 2015 Canonical Ltd.
+# All rights reserved.
+#
+# Written by:
+# Zygmunt Krynicki <zygmunt.krynicki@canonical.com>
+
+
+"""Collect information about all sysfs attributes related to TPM."""
+
+import os
+
+import guacamole
+
+
+class tpm_sysfs_resource(guacamole.Command):
+
+ """
+ Collect information about all sysfs attributes related to TPM.
+
+ This program traverses all the TPM device nodes found in /sys/class/tpm/.
+ Each present device is subsequently inspected by reading all readable files
+ in /sys/class/tpm/*/device/* and presenting the data present there as
+ subsequent RFC822 records. There is one record per TPM chip. In order to
+ differentiate each chip, each record contains the field x-sysfs-device-name
+ that stores the full sysfs directory name of the chip.
+
+ @EPILOG@
+
+ Unreadable files (typically due to permissions) are silently skipped.
+ """
+
+ def invoked(self, ctx):
+ # This is found on 4.2 kernels
+ sysfs_root_tpm = '/sys/class/tpm/'
+ # This is found on 3.19 kernels
+ sysfs_root_misc = '/sys/class/misc/'
+ if os.path.isdir(sysfs_root_tpm):
+ sysfs_root = sysfs_root_tpm
+ elif os.path.isdir(sysfs_root_misc):
+ sysfs_root = sysfs_root_misc
+ else:
+ return
+ for tpm_id in sorted(os.listdir(sysfs_root)):
+ if sysfs_root == sysfs_root_misc and not tpm_id.startswith('tpm'):
+ continue
+ print("x-sysfs-device-name: {}".format(tpm_id))
+ tpm_dirname = os.path.join(sysfs_root, tpm_id, 'device')
+ for tpm_attr in sorted(os.listdir(tpm_dirname)):
+ tpm_filename = os.path.join(tpm_dirname, tpm_attr)
+ if not os.path.isfile(tpm_filename):
+ continue
+ if not os.access(tpm_filename, os.R_OK):
+ continue
+ with open(tpm_filename, 'rt', encoding='utf-8') as stream:
+ tpm_data = stream.read()
+ tpm_data = tpm_data.rstrip()
+ if '\n' in tpm_data:
+ print("{}:".format(tpm_attr))
+ for tpm_data_chunk in tpm_data.splitlines():
+ print(" {}".format(tpm_data_chunk))
+ else:
+ print("{}: {}".format(tpm_attr, tpm_data))
+ print()
+
+
+if __name__ == "__main__":
+ tpm_sysfs_resource().main()