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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import argparse
import yaml
import os
from dns import resolver, reversename
OWN_DIRECTORY = os.path.dirname(os.path.abspath(os.path.realpath(__file__)))
LIB = os.path.join(OWN_DIRECTORY, '..')
if os.path.exists(os.path.join(LIB, 'hostinfo')):
sys.path = [LIB] + sys.path
from hostinfo import printer
from hostinfo import utils
def _get_data(path):
stream = file(path, 'r')
return yaml.load(stream)
def match_key(data, keys):
if data is None:
return None
if len(keys) == 0:
return data
key = keys[0]
rest = keys[1:]
if key == 'addresses' and 'addresses' in data:
return match_key(utils.group_by(data['addresses'], 'interface'), rest)
if key == 'ports' and 'ports' in data:
return match_key(utils.group_by(data['ports'], 'process', 'UNKNOWN'), rest)
if isinstance(data, dict):
if key in data:
return match_key(data[key], rest)
return None
if isinstance(data, list):
for elem in data:
result = match_key(elem, keys)
if result is not None:
return result
return None
if data == key:
return data
return None
def match(host, search):
if search[0] != '?':
sys.stderr.write("Invalid search string.")
sys.exit(1)
search = search[1:]
negate = False
if search[0] == '~':
search = search[1:]
negate = True
key_elem = search.split('.')
data = host
result = match_key(data, key_elem)
if negate:
if result is not None:
return (search, None)
return (None, True)
return (search, result)
def print_search(basepath, flags, search, filter_key=None):
def _get_label(host):
if flags.short:
return host.replace('.spline.inf.fu-berlin.de','')
return host
metadata = os.path.join(basepath, 'metadata', 'hosts')
if not os.path.exists(metadata):
sys.stderr.write("Invalid hostinfo data. "
"'metadata/hosts' not found!\n")
sys.exit(1)
hosts = _get_data(metadata)
length = [len(_get_label(host)) for host in hosts['hosts']]
for host in hosts['hosts']:
data = _get_data(os.path.join(basepath, host))
key, result = match(data, search)
if result is not None:
if flags.only_names:
print(_get_label(host))
continue
p = printer.Printer(data, flags)
if filter_key is not None or flags.details:
p.info(filter_key, label=_get_label(host), maxlength=max(length))
else:
if key is None:
print(_get_label(host))
else:
p.info(key, label=_get_label(host), maxlength=max(length))
def print_info(path, flags, key=None):
data = _get_data(path)
p = printer.Printer(data, flags)
p.info(key)
def print_keys(path):
def _print_keys(data, prefix = ''):
if isinstance(data, str):
return
for key in data.keys():
print "%s%s" % (prefix, key)
if key == 'addresses':
for k in utils.group_by(data[key], 'interface').keys():
print "%s%s.%s" % (prefix, key, k)
elif key == 'ports':
for k in utils.group_by(data[key], 'process', 'UNKNOWN').keys():
print "%s%s.%s" % (prefix, key, k)
elif isinstance(data[key], dict):
_print_keys(data[key], "%s%s." % (prefix, key))
elif isinstance(data[key], list):
for value in data[key]:
_print_keys(value, "%s%s." % (prefix, key))
data = _get_data(path)
_print_keys(data)
def print_hosts(path, short):
metadata = os.path.join(path, 'metadata', 'hosts')
if os.path.exists(metadata):
hosts = yaml.load(file(metadata, 'r'))
if 'hosts' in hosts:
for host in hosts['hosts']:
if short:
print(host.replace('.spline.inf.fu-berlin.de',''))
else:
print(host)
return True
sys.stderr.write("'%s' not found!\n" % metadata)
return False
def find_host(basepath, host):
path = os.path.join(basepath, host)
if os.path.exists(path):
return path
# try to build the fqdn
path = os.path.join(basepath, "%s.spline.inf.fu-berlin.de" %
host.replace('.spline.de', ''))
if os.path.exists(path):
return path
try:
# try to use reverse dns
addr = reversename.from_address(host)
hostname = str(resolver.query(addr,"PTR")[0])
path = os.path.join(basepath, hostname[0:-1])
except:
pass
if os.path.exists(path):
return path
return None
def main():
basepath = '/usr/local/share/hostinfo'
if 'HOSTINFO_PATH' in os.environ and os.environ['HOSTINFO_PATH'] != '':
basepath = os.environ['HOSTINFO_PATH']
parser = argparse.ArgumentParser()
parser.add_argument("name", nargs="?")
parser.add_argument("filter", nargs="?")
parser.add_argument("-o", "--oneline", action="store_true",
help="each line is a complete record")
parser.add_argument("-f", "--file", action="store_true",
help="print the path of the file the "
"information is read from")
parser.add_argument("-k", "--keys", action="store_true",
help="print only the available keys "
"(used for bash completion)")
parser.add_argument("-v", "--verbose", action="store_true",
help="increase output verbosity")
parser.add_argument("-n", "--nospaces", action="store_true",
help="remove unnecessary spaces from output")
parser.add_argument("-p", "--path", default=basepath,
help="set the basepath to the hostinfo data")
parser.add_argument("-l", "--hosts", action="store_true",
help="lists all available hosts")
parser.add_argument("-s", "--short", action="store_true",
help="remove the domain from the output")
parser.add_argument("--only-names", action="store_true",
help="only print the hostname of the matching entries")
parser.add_argument("-d", "--details", action="store_true",
help="print details about matching hosts")
args = parser.parse_args()
if args.path:
basepath = args.path
if args.hosts:
if not print_hosts(basepath, args.short):
sys.exit(1)
sys.exit(0)
if args.name is None:
parser.print_help()
sys.exit(1)
if args.name.startswith('?'):
# search
print_search(basepath, search=args.name, filter_key=args.filter, flags=args)
else:
# info
path = find_host(basepath, args.name)
if path is None:
sys.stderr.write("Host '%s' could not be found!\n" % args.name)
sys.exit(1)
if args.file:
print(path)
elif args.keys:
print_keys(path)
else:
print_info(path, key=args.filter, flags=args)
sys.exit(0)
if __name__ == '__main__':
main()
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