From 25f54ac07dcc62d44059fd8f73091a1b3a535fa3 Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <alexander@sulfrian.net>
Date: Mon, 6 May 2013 17:20:20 +0200
Subject: initial commit

---
 hostinfo   | 59 +++++++++++++++++++++++++++++++++++++++++++++++++
 printer.py | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 133 insertions(+)
 create mode 100755 hostinfo
 create mode 100644 printer.py

diff --git a/hostinfo b/hostinfo
new file mode 100755
index 0000000..bf08d03
--- /dev/null
+++ b/hostinfo
@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import sys
+import socket
+import yaml
+import os.path
+from dns import resolver,reversename
+
+import printer
+
+def print_info(path, key=None):
+    stream = file(path, 'r')
+    data = yaml.load(stream)
+
+    p = printer.Printer(data)
+    p.info(key)
+
+def find_host(host, key=None):
+    path = "/usr/local/share/hostinfo/%s" % host
+
+    if not os.path.exists(path):
+        # try to build the fqdn
+        path = "/usr/local/share/hostinfo/%s.spline.inf.fu-berlin.de" % \
+            host.replace('.spline.de', '')
+
+        if not os.path.exists(path):
+            try:
+                # try to use reverse dns
+                addr=reversename.from_address(host)
+                hostname = str(resolver.query(addr,"PTR")[0])
+                path = "/usr/local/share/hostinfo/%s" % hostname[0:-1]
+            except:
+                pass
+
+            if not os.path.exists(path):
+                return False
+
+    print_info(path, key)
+    return True
+
+def main():
+    if len(sys.argv) < 2:
+        print('Usage: %s <host> [info]' % sys.argv[0])
+        sys.exit(1)
+
+    if len(sys.argv) == 2:
+        if find_host(sys.argv[1]):
+            sys.exit(0)
+    else:
+        if find_host(sys.argv[1], sys.argv[2]):
+            sys.exit(0)
+
+    print("Host '%s' could not be found!" % sys.argv[1])
+    sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/printer.py b/printer.py
new file mode 100644
index 0000000..7d440d0
--- /dev/null
+++ b/printer.py
@@ -0,0 +1,74 @@
+# -*- coding: utf-8 -*-
+
+class Printer:
+    labels = {
+        'hostname': 'Hostname',
+        'arch': 'Architecture',
+        'os': 'Operating System',
+        'addresses': 'IPs'
+    }
+
+    sort = ['hostname', 'arch', 'os', 'addresses']
+    ignore = ['vserver-host']
+
+    def __init__(self, data):
+        self.data = data
+
+    def print_addresses(self, label, value):
+        for ip in value:
+            print('%s%s/%s (%s)' %
+                  (label, ip['address'], ip['netmask'], ip['interface']))
+            label = self.empty
+
+    def print_vserver(self, label, value):
+        if value == 'guest':
+            print('%sguest running on %s' %
+                  (label, self.data['vserver-host']))
+        else:
+            print('%s %s' % (self.label, value))
+
+    def print_default(self, key, value):
+        label = ''
+        if self.length > 0:
+            label = '%s: ' % self.get_label(key)
+            label = label.rjust(self.length)
+
+        try:
+            method = getattr(self, 'print_%s' % key)
+            method(label, value)
+        except AttributeError:
+            if isinstance(value, list):
+                for v in value:
+                    print('%s%s' % (label, v))
+                    label = self.empty
+            else:
+                print('%s%s' % (label, value))
+
+    def get_label(self, key):
+        if key in self.labels:
+            return self.labels[key]
+        return key
+
+    def info(self, key):
+        # find max lenght for labels
+        labels = map(self.get_label, self.data.keys())
+        self.length = max(map(len, labels)) + 3
+        self.empty = ' ' * self.length
+
+        if key is not None:
+            self.length = 0
+            self.empty = ''
+            if key in self.data:
+                self.print_default(key, self.data[key])
+        else:
+            # first the sorted keys
+            for key in self.sort:
+                if key in self.data:
+                    self.print_default(key, self.data[key])
+
+            # other keys, that are not ignored
+            for key in [k for k in self.data.keys()
+                        if k not in self.sort
+                        and k not in self.ignore]:
+                self.print_default(key, self.data[key])
+
-- 
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