Refactor VM volume mounting

- Replace bind-mounts on /lmn/media/$USER with separate
  mounting for Home and Share SMB shares in the VM.
- Update vm-run to start virtiofsd with /lmn/media/$USER
  (/home/$USER on localhome machines).
- Use vm-vminfo to generate a JSON file containing user
  information, including Username, Groups, printer list
  krb5-ticket and some more
- Configure vminfo.service (systemd-timer) to periodically
  call vm-vminfo.
- Ensure krb5-ticket (TGT) is injected into the Windows VM.
- Mount SMB-Home and SMB-Share shares as part of the new structure.

roles/lmn_vm/files/vm-vminfo

@@ -0,0 +1,113 @@
+#!/usr/bin/python3
+
+import argparse
+import struct
+import subprocess
+import json
+
+from os import environ,path
+from impacket.krb5.ccache import CCache
+from base64 import b64encode
+
+home = ""
+nethome = ""
+vminfo = {}
+
+def get_printers():
+    printers = []
+    try:
+        result = subprocess.run(['lpstat', '-v'], capture_output=True, text=True, check=True)
+        for line in result.stdout.splitlines():
+            # Extrahiere den Druckernamen
+            printer_name = line.split()[2].rstrip(':')
+            ipp_url = f"ipp://192.168.122.1/printers/{printer_name}"
+            printer = { 'Name': printer_name, 'IppURL': ipp_url }
+            printers.append(printer)
+        return printers
+    except subprocess.CalledProcessError as e:
+        print(f"Fehler beim Abrufen der Drucker: {e}")
+        return []
+
+def get_groups(username):
+    try:
+        result = subprocess.run(['id', '-Gnz',  username], capture_output=True, text=True, check=True)
+        groups = result.stdout.strip().split('\0')
+        return groups
+    except subprocess.CalledProcessError as e:
+        print(f"Fehler beim Abrufen der Gruppen: {e}")
+        return []
+
+def get_krb5 ():
+    krb5 = {}
+    ccachefilename = environ.get('KRB5CCNAME').replace('FILE:', '')
+    if ccachefilename:
+        try:
+            ccache = CCache.loadFile(ccachefilename)
+            cred = ccache.toKRBCRED()
+            cred_enc = b64encode(cred)
+            krb5['cred'] = cred_enc.decode('utf-8')
+            krb5['starttime'] = ccache.credentials[0]['time']['starttime']
+            krb5['endtime'] = ccache.credentials[0]['time']['endtime']
+            krb5['renew_till'] = ccache.credentials[0]['time']['renew_till']
+        except:
+            print("Fehler beim Ticket laden")
+    return krb5
+
+def get_mounts():
+    mounts = []
+    mounts.append({ 'Drive': 'H', 'RemotePath': '\\\\server.pn.steinbeis.schule' + nethome.replace('/srv/samba/schools','').replace('/','\\'), 'Name': 'Home_Server' })
+    mounts.append({ 'Drive': 'T', 'RemotePath': '\\\\server.pn.steinbeis.schule\default-school\share', 'Name': 'Tausch' })
+    return mounts
+
+def get_user_folders():
+    HOME="H:"
+    if environ.get('HOME') != nethome:
+        HOME="Y:"
+    folders = []
+    folders.append( {'Name': 'Personal', 'Path': f"{HOME}\Dokumente"} )
+    folders.append( {'Name': 'My Pictures', 'Path': f"{HOME}\Bilder"} )
+    folders.append( {'Name': 'My Music', 'Path': f"{HOME}\Musik"} )
+    folders.append( {'Name': 'My Video', 'Path': f"{HOME}\Videos"} )
+    return folders
+
+def get_quickaccess():
+    quickaccess = []
+    quickaccess.append( 'H:\\transfer' )
+    return quickaccess
+
+def parse_args():
+    parser = argparse.ArgumentParser()
+    #parser.add_argument('input_file', help="File in kirbi (KRB-CRED) or ccache format")
+    #parser.add_argument('output_file', help="Output file")
+    return parser.parse_args()
+
+
+def main():
+    global home, nethome
+
+    args = parse_args()
+
+    home = environ.get('HOME')
+
+    vminfo['User'] = environ.get('USER')
+    vminfo['Groups'] = get_groups(environ.get('USER'))
+
+    if 'teachers' in vminfo['Groups']:
+        nethome = f"/srv/samba/schools/default-school/teachers/{vminfo['User']}"
+    else:
+        result = subprocess.run(['find', '/srv/samba/schools/default-school/students/', '-name', vminfo['User'], '-maxdepth', '2', '-type', 'd'], capture_output=True, text=True, check=False)
+        nethome = result.stdout
+
+    vminfo['Printers'] = get_printers()
+    vminfo['krb5'] = get_krb5()
+    vminfo['Mounts'] = get_mounts()
+    vminfo['UserShellFolders'] = get_user_folders()
+    vminfo['QuickAccess'] = get_quickaccess()
+
+    vminfo_json = json.dumps(vminfo, ensure_ascii=False, indent=4)
+    print(vminfo_json) 
+
+if __name__ == '__main__':
+    main()
+
+