Merge pull request #8 from jbrodriguez/id/hostname

T574: Add new style scripts and definitions for system host-name

1 files changed, 90 insertions, 0 deletions

diff --git a/src/conf-mode/vyos-config-host-name.py b/src/conf-mode/vyos-config-host-name.py
new file mode 100644
index 000000000..da053d9f6
--- /dev/null
+++ b/src/conf-mode/vyos-config-host-name.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018 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
+import re
+import sys
+
+from vyos.config import Config
+from vyos.util import ConfigError
+
+hostname_config = "/etc/hostname"
+mailname_config = "/etc/mailname"
+hostname_regex = re.compile("^[A-Za-z0-9][-.A-Za-z0-9]*[A-Za-z0-9]$")
+
+def get_config():
+    conf = Config()
+    conf.set_level("system")
+    
+	hostname = conf.return_value("host-name")
+	domain = conf.return_value("domain-name")
+
+    return {
+		"hostname": hostname,
+		"domain": domain
+	}
+
+def verify(config):
+	# check for invalid host
+	
+	# pattern $VAR(@) "^[[:alnum:]][-.[:alnum:]]*[[:alnum:]]$" ; "invalid host name $VAR(@)"
+	valid = hostname_regex.match(config.hostname)
+	if (!valid):
+		raise ConfigError('invalid host name' + config.hostname)
+
+	# pattern $VAR(@) "^.{1,63}$" ; "invalid host-name length"
+	length = len(config.hostname)
+	if length < 1 or length > 63:
+		raise ConfigError('invalid host-name length')
+
+	return None
+
+
+def generate(config):
+	mailname = config.hostname
+	if config.domain != "":
+		mailname += '.' + config.domain
+
+	# update /etc/hostname
+	with open(hostname_config, 'w') as f:
+		f.write(config.hostname)
+
+	# update /etc/mailname
+	with open(mailname_config, 'w') as f:
+		f.write(mailname)
+
+	return None
+
+
+def apply(config):
+	# set hostname for the current session
+    cmd = "hostname " + config.hostname
+    os.system(cmd)
+
+	return None
+
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        sys.exit(1)