initial commit

tcl/plugin/cc_rack

@@ -0,0 +1,82 @@
+#!/usr/bin/env python3
+import socket
+import sys
+import re
+from subprocess import check_output
+from ast import literal_eval
+
+rack_hosts = {k.lower(): v for k, v in
+    literal_eval(check_output('config/json_racklist').decode()).items()}
+
+def get_ip(host):
+    """given a host name, return ip as list of str(int) or None when not found"""
+    try:
+        for info in  socket.getaddrinfo(host, 0, 0, socket.SOCK_STREAM):
+            ip = info[4][0].split('.')
+            if len(ip) == 4:
+                return ip
+    except socket.gaierror:
+        pass
+    return None
+
+def get_host(ip):
+    """given ip as list of str(int), return host or None when not found"""
+    try:
+        return socket.gethostbyaddr('.'.join(ip))[0]
+    except socket.herror:
+        return None
+
+def subnet(ip_subnet):
+    """try to find subnet"""
+    ip = list(ip_subnet)
+    if ip[0:2] != ['172', '28']:
+        return 'office'
+    ip[3] = '60'  # assume instrument computer is at address 172.38.*.60
+    return get_host(ip).split('.')[0]
+
+def get_rack(rack_name=None):
+    myip = get_ip(socket.gethostname())
+    if not myip:
+        return '! no own ip'
+
+    if rack_name:
+        rack_name = rack_name.lower()
+        rack_host = rack_hosts.get(rack_name)
+        if not rack_host:
+            return '%s is no known rack (see sea/tcl/config/rack.list)' % rack_name
+        rack_ip = get_ip(rack_host)
+        if not rack_ip:
+            return '! %s not found' % rack_name
+        if subnet(rack_ip) == 'office' or subnet(rack_ip) == subnet(myip):
+            return rack_name  # given rack is accessible
+        return '! %s (%s) is in %s net' % (rack_name, '.'.join(rack_ip), subnet(rack_ip))
+
+    other_racks = []
+    found_racks = []
+    for rack, host in rack_hosts.items():
+        if rack == rack_name:
+            continue
+        ip = get_ip(host)
+        if ip:
+            if subnet(ip) == subnet(myip):
+                found_racks.append(rack)
+            else:
+                other_racks.append(rack)
+    if found_racks:
+        return ' '.join(found_racks)
+    if subnet(myip) == 'office':
+        other_racks = []
+    if other_racks:
+        return ' '.join(other_racks)
+    return "! no racks accessible"
+
+
+if len(sys.argv) > 2:
+    print('Usage: cc_rack [<guessed rack>]')
+else:
+    if len(sys.argv) == 2:
+        rack_name = sys.argv[1].lower()
+    else:
+        rack_name = None
+    print(get_rack(rack_name))
+

tcl/plugin/safeplugin

@@ -0,0 +1,9 @@
+#!/bin/tcsh
+set scriptdir=$0:h
+set plugin=$0:h/$1
+set plugindir=$plugin:h
+if ($scriptdir == $plugindir) then
+  $plugin $2 $3 $4 $5 $6 $7 $8 $9
+else
+  echo "not allowed to execute $plugin"
+endif