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https://github.com/ostreedev/ostree.git
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105 lines
3.4 KiB
Python
105 lines
3.4 KiB
Python
#!/usr/bin/python3
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#
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# Copyright (C) 2015 Red Hat
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library. If not, see <https://www.gnu.org/licenses/>.
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import os
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import sys
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import functools
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if len(sys.argv) == 1:
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loaderpath = '/boot/loader/entries'
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grub2path = '/boot/grub2/grub.cfg'
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else:
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loaderpath = sys.argv[1]
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grub2path = sys.argv[2]
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def fatal(msg):
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sys.stderr.write(msg)
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sys.stderr.write('\n')
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sys.exit(1)
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def compare_entries_descending(a, b):
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return int(b['version']) - int(a['version'])
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def get_ostree_option(optionstring):
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for o in optionstring.split():
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if o.startswith('ostree='):
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return o[8:]
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raise ValueError('ostree= not found')
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entries = []
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grub2_entries = []
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# Parse loader configs
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for fname in os.listdir(loaderpath):
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path = os.path.join(loaderpath, fname)
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with open(path) as f:
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entry = {}
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for line in f:
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line = line.strip()
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if (line == '' or line.startswith('#')):
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continue
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s = line.find(' ')
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assert s > 0
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k = line[0:s]
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v = line[s+1:]
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entry[k] = v
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entries.append(entry)
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entries.sort(key=functools.cmp_to_key(compare_entries_descending))
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# Parse GRUB2 config
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with open(grub2path) as f:
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in_ostree_config = False
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grub2_entry = None
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for line in f:
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if line.startswith('### BEGIN /etc/grub.d/15_ostree ###'):
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in_ostree_config = True
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elif line.startswith('### END /etc/grub.d/15_ostree ###'):
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in_ostree_config = False
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if grub2_entry is not None:
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grub2_entries.append(grub2_entry)
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elif in_ostree_config:
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if line.startswith('menuentry '):
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if grub2_entry is not None:
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grub2_entries.append(grub2_entry)
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grub2_entry = {}
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elif line.startswith('linux'):
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parts = line.split()
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grub2_entry['linux'] = parts[1]
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grub2_entry['options'] = ' '.join(parts[2:])
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elif line.startswith('initrd'):
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grub2_entry['initrd'] = line.split()[1]
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if len(entries) != len(grub2_entries):
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fatal("Found {0} loader entries, but {1} GRUB2 entries\n".format(len(entries), len(grub2_entries)))
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def assert_matches_key(a, b, key):
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aval = a[key]
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bval = b[key]
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if aval != bval:
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fatal("Mismatch on {0}: {1} != {2}".format(key, aval, bval))
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for i,(entry,grub2entry) in enumerate(zip(entries, grub2_entries)):
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assert_matches_key(entry, grub2entry, 'linux')
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assert_matches_key(entry, grub2entry, 'initrd')
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entry_ostree = get_ostree_option(entry['options'])
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grub2_ostree = get_ostree_option(grub2entry['options'])
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if entry_ostree != grub2_ostree:
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fatal("Mismatch on ostree option: {0} != {1}".format(entry_ostree, grub2_ostree))
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sys.stdout.write('GRUB2 configuration validated\n')
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sys.exit(0)
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