/usr/lib/xen-common/bin/xen-init-name is in xen-utils-common 4.9.2-0ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | #!/usr/bin/python
import json
import re
import sys
import subprocess
class SXPParser(object):
tokenizer_rules = r""" (?P<open> \( ) | (?P<close> \) ) | (?P<whitespace> \s+ ) | [^()^\s]+ """
tokenizer_re = re.compile(tokenizer_rules, re.X)
@classmethod
def loads(cls, input):
data = []
stack = []
for match in cls.tokenizer_re.finditer(input):
if match.group('open'):
stack.append([])
elif match.group('close'):
top = stack.pop()
if stack:
stack[-1].append(top)
else:
data.append(top)
elif match.group('whitespace'):
pass
else:
if stack:
stack[-1].append(match.group())
return data
class Data(object):
def __call__(self, out):
out.write('{}\n'.format(self.name))
class DataJSON(Data):
def __init__(self, p):
s = json.loads(p)
self.name = s['c_info']['name']
class DataSXP(Data):
def __init__(self, p):
s = SXPParser.loads(p)
for i in s:
if i and i[0] == 'domain':
data = dict(j for j in i if len(j) == 2)
self.name = data['name']
break
if __name__ == '__main__':
p = subprocess.check_output(('xen', 'create', '--quiet', '--dryrun', '--defconfig', sys.argv[1]))
if p[0] == '(':
d = DataSXP(p)
else:
d = DataJSON(p)
d(sys.stdout)
|