Hostname strategy implementation for OpenRC based systems (e.g. Gentoo)

library/system/hostname

@@ -288,6 +288,44 @@ class FedoraStrategy(GenericStrategy):
 
 # ===========================================
 
+class OpenRCStrategy(GenericStrategy):
+    """
+    This is a Gentoo (OpenRC) Hostname manipulation strategy class - it edits
+    the /etc/conf.d/hostname file.
+    """
+
+    HOSTNAME_FILE = '/etc/conf.d/hostname'
+
+    def get_permanent_hostname(self):
+        try:
+            with open(self.HOSTNAME_FILE, 'r') as f:
+                for line in f:
+                    line = line.strip()
+                    if line.startswith('hostname='):
+                        return line[10:].strip('"')
+            return None
+        except Exception, err:
+            self.module.fail_json(msg="failed to read hostname: %s" %
+                str(err))
+
+    def set_permanent_hostname(self, name):
+        try:
+            with open(self.HOSTNAME_FILE, 'r') as f:
+                lines = [x.strip() for x in f]
+
+            for i, line in enumerate(lines):
+                if line.startswith('hostname='):
+                    lines[i] = 'hostname="%s"' % name
+                    break
+
+            with open(self.HOSTNAME_FILE, 'w') as f:
+                f.write('\n'.join(lines) + '\n')
+        except Exception, err:
+            self.module.fail_json(msg="failed to update hostname: %s" %
+                str(err))
+
+# ===========================================
+
 class FedoraHostname(Hostname):
     platform = 'Linux'
     distribution = 'Fedora'
@@ -366,6 +404,11 @@ class LinaroHostname(Hostname):
     distribution = 'Linaro'
     strategy_class = DebianStrategy
 
+class GentooHostname(Hostname):
+    platform = 'Linux'
+    distribution = 'Gentoo base system'
+    strategy_class = OpenRCStrategy
+
 # ===========================================
 
 def main():