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authorChristian Poessinger <christian@poessinger.com>2020-06-08 21:42:09 +0200
committerChristian Poessinger <christian@poessinger.com>2020-06-09 21:00:39 +0200
commita75bc85df3da707d75531b001150cc8501573184 (patch)
tree645f8ae0bdef1f1e7c4043c0255139874ad8dd50 /src/conf_mode/system_console.py
parentdc7654cbc6cd18bd202a3fa52c2afef3fbc11b45 (diff)
downloadvyos-1x-a75bc85df3da707d75531b001150cc8501573184.tar.gz
vyos-1x-a75bc85df3da707d75531b001150cc8501573184.zip
console: T2569: initial implementation with XML and Python
Migrate the serial console subsystem to XML and Python.
Diffstat (limited to 'src/conf_mode/system_console.py')
-rwxr-xr-xsrc/conf_mode/system_console.py111
1 files changed, 111 insertions, 0 deletions
diff --git a/src/conf_mode/system_console.py b/src/conf_mode/system_console.py
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+++ b/src/conf_mode/system_console.py
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+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import os
+
+from vyos.config import Config
+from vyos.util import call
+from vyos import ConfigError, airbag
+airbag.enable()
+
+serial_getty_file = '/lib/systemd/system/serial-getty@.service'
+
+def get_config():
+ conf = Config()
+ base = ['system', 'console']
+
+ if not conf.exists(base):
+ return None
+
+ # retrieve configuration at once
+ console = conf.get_config_dict(base)
+
+ # set default values
+ if 'device' in console.keys():
+ for device in console['device'].keys():
+ # no speed setting has been configured - use default value
+ if not 'speed' in console['device'][device].keys():
+ tmp = { 'speed': '' }
+ if device.startswith('hvc'):
+ tmp['speed'] = 38400
+ else:
+ tmp['speed'] = 115200
+
+ console['device'][device].update(tmp)
+
+ return console
+
+def verify(console):
+ if not os.path.isfile(serial_getty_file):
+ raise ConfigError(f'Could not open: {serial_getty_file}')
+
+ return None
+
+def generate(console):
+ base_dir = '/etc/systemd/system'
+ # Remove all serial-getty configuration files in advance
+ for root, dirs, files in os.walk(base_dir):
+ for basename in files:
+ if 'serial-getty' in basename:
+ call(f'systemctl stop {basename}')
+ os.unlink(os.path.join(root, basename))
+
+ # bail out early if serial device is not configured
+ if not console or 'device' not in console.keys():
+ return None
+
+ for device in console['device'].keys():
+ serial_getty_device_file = f'{base_dir}/serial-getty@{device}.service'
+ serial_getty_wants_file = f'{base_dir}/getty.target.wants/serial-getty@{device}.service'
+
+ with open(serial_getty_file, 'r') as f:
+ tmp = f.read()
+ tmp = tmp.replace('115200,38400,9600', str(console['device'][device]['speed']))
+
+ with open(serial_getty_device_file, 'w') as f:
+ f.write(tmp)
+
+ # Reload systemd manager configuration
+ call('systemctl daemon-reload')
+ return None
+
+def apply(console):
+ # bail out early
+ if not console:
+ call( '/usr/bin/setterm -blank 0 -powersave off -powerdown 0 -term linux </dev/console >/dev/console 2>&1')
+ return None
+
+ # Configure screen blank powersaving on VGA console
+ if 'powersave' in console.keys():
+ call('/usr/bin/setterm -blank 15 -powersave powerdown -powerdown 60 -term linux </dev/console >/dev/console 2>&1')
+ else:
+ call( '/usr/bin/setterm -blank 0 -powersave off -powerdown 0 -term linux </dev/console >/dev/console 2>&1')
+
+ # Start getty process on configured serial interfaces
+ for device in console['device'].keys():
+ call(f'systemctl start serial-getty@{device}.service')
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)