Add utils modules

* disk.py

	Disk discovery

* fs.py

	Uses psutil to fetch fs usage information

* menu.py

	ogBrowser menu generation

* net.py: gets nic status information

	IP address, MAC address and ethernet speed.

* probe.py: probes mountpoints for operating systems

	Uses hivexget command to try fetching Windows installation
	information.
	Looks for /etc/os-release for probing linux systems.

1 files changed, 60 insertions, 0 deletions

diff --git a/src/utils/fs.py b/src/utils/fs.py
new file mode 100644
index 0000000..43011ef
--- /dev/null
+++ b/src/utils/fs.py
@@ -0,0 +1,60 @@
+#
+# Copyright (C) 2022 Soleta Networks <info@soleta.eu>
+#
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the
+# Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+import os
+import subprocess
+
+from subprocess import DEVNULL
+
+import psutil
+
+
+def mount_mkdir(source, target):
+    """
+    Mounts and creates the mountpoint directory if it's not present.
+    """
+    if not os.path.exists(target):
+        os.mkdir(target)
+    if not os.path.ismount(target):
+        return mount(source, target)
+    return False
+
+
+def mount(source, target):
+    """
+    Mounts source into target directoru using mount(8).
+
+    Return true if exit code is 0. False otherwise.
+    """
+    cmd = f'mount {source} {target}'
+    proc = subprocess.run(cmd.split(), stderr=DEVNULL)
+
+    return not proc.returncode
+
+
+def umount(target):
+    """
+    Umounts target using umount(8).
+
+    Return true if exit code is 0. False otherwise.
+    """
+    cmd = f'umount {target}'
+    proc = subprocess.run(cmd.split(), stderr=DEVNULL)
+
+    return not proc.returncode
+
+
+def get_usedperc(mountpoint):
+    """
+    Returns percetage of used filesystem as decimal number.
+    """
+    try:
+        total, used, free, perc = psutil.disk_usage(mountpoint)
+    except FileNotFoundError:
+        return '0'
+    return str(perc)