qvm-ls & qvm-device: Handle removal of VM during on_shutdown.

Fixes QubesOS/qubes-issues#5105

qubesadmin/tools/qvm_device.py

@@ -91,8 +91,11 @@ def list_devices(args):
 
         else:
             for domain in app.domains:
+                try:
                     for dev in domain.devices[args.devclass].available():
                         devices.add(dev)
+                except qubesadmin.exc.QubesVMNotFoundError:
+                    continue
     except qubesadmin.exc.QubesDaemonAccessError:
         raise qubesadmin.exc.QubesException(
             "Failed to list '%s' devices, this device type either "
@@ -105,6 +108,7 @@ def list_devices(args):
             if domain == dev.backend_domain:
                 continue
 
+            try:
                 for assignment in domain.devices[args.devclass].assignments():
                     if dev != assignment:
                         continue
@@ -115,6 +119,8 @@ def list_devices(args):
                                               assignment.options.items())))
                     else:
                         result[dev].frontends.append(str(domain))
+            except qubesadmin.exc.QubesVMNotFoundError:
+                continue
 
     qubesadmin.tools.print_table(prepare_table(result.values()))
 
@@ -281,7 +287,8 @@ def main(args=None, app=None):
     if basename.startswith('qvm-') and basename != 'qvm-device':
         devclass = basename[4:]
 
-    args = get_parser(devclass).parse_args(args, app=app)
+    parser = get_parser(devclass)
+    args = parser.parse_args(args, app=app)
 
     if args.list_device_classes:
         print('\n'.join(qubesadmin.Qubes().list_deviceclass()))
@@ -290,7 +297,7 @@ def main(args=None, app=None):
     try:
         args.func(args)
     except qubesadmin.exc.QubesException as e:
-        print(str(e), file=sys.stderr)
+        parser.print_error(str(e))
         return 1
     return 0
 

qubesadmin/tools/qvm_ls.py

@@ -467,17 +467,25 @@ class Table(object):
             table_data.append(self.get_head())
             self.spinner.update()
             if self.tree_sorted:
+                #FIXME: handle qubesadmin.exc.QubesVMNotFoundError
+                #       (see QubesOS/qubes-issues#5105)
                 insertion_vm_list = self.sort_to_tree(self.domains)
                 for insertion, vm in insertion_vm_list:
                     table_data.append(self.get_row(vm, insertion))
             else:
                 for vm in sorted(self.domains):
+                    try:
                         table_data.append(self.get_row(vm))
+                    except qubesadmin.exc.QubesVMNotFoundError:
+                        continue
             self.spinner.hide()
             qubesadmin.tools.print_table(table_data, stream=stream)
         else:
             for vm in sorted(self.domains):
+                try:
                     stream.write('|'.join(self.get_row(vm)) + '\n')
+                except qubesadmin.exc.QubesVMNotFoundError:
+                    continue
 
 
 #: Available formats. Feel free to plug your own one.
@@ -576,7 +584,7 @@ def get_parser():
     parser = qubesadmin.tools.QubesArgumentParser(
         vmname_nargs=argparse.ZERO_OR_MORE,
         formatter_class=argparse.RawTextHelpFormatter,
-        description='List Qubes domains and their parametres.',
+        description='List Qubes domains and their parameters.',
         epilog='available formats (see --help-formats):\n{}\n\n'
                'available columns (see --help-columns):\n{}'.format(
                 wrapper.fill(', '.join(sorted(formats.keys()))),