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66 lines
2.4 KiB
Python
Executable File
66 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python3
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# SPDX-License-Identifier: LGPL-2.1+
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#
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# Simple udev rules syntax checker
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#
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# © 2010 Canonical Ltd.
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# Author: Martin Pitt <martin.pitt@ubuntu.com>
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import re
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import sys
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import os
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from glob import glob
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rules_files = sys.argv[1:]
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if not rules_files:
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sys.exit('Specify files to test as arguments')
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quoted_string_re = r'"(?:[^\\"]|\\.)*"'
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no_args_tests = re.compile(r'(ACTION|DEVPATH|KERNELS?|NAME|SYMLINK|SUBSYSTEMS?|DRIVERS?|TAG|PROGRAM|RESULT|TEST)\s*(?:=|!)=\s*' + quoted_string_re + '$')
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# PROGRAM can also be specified as an assignment.
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program_assign = re.compile(r'PROGRAM\s*=\s*' + quoted_string_re + '$')
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args_tests = re.compile(r'(ATTRS?|ENV|TEST){([a-zA-Z0-9/_.*%-]+)}\s*(?:=|!)=\s*' + quoted_string_re + '$')
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no_args_assign = re.compile(r'(NAME|SYMLINK|OWNER|GROUP|MODE|TAG|RUN|LABEL|GOTO|OPTIONS|IMPORT)\s*(?:\+=|:=|=)\s*' + quoted_string_re + '$')
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args_assign = re.compile(r'(ATTR|ENV|IMPORT|RUN){([a-zA-Z0-9/_.*%-]+)}\s*(=|\+=)\s*' + quoted_string_re + '$')
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# Find comma-separated groups, but allow commas that are inside quoted strings.
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# Using quoted_string_re + '?' so that strings missing the last double quote
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# will still match for this part that splits on commas.
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comma_separated_group_re = re.compile(r'(?:[^,"]|' + quoted_string_re + '?)+')
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result = 0
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buffer = ''
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for path in rules_files:
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print('# looking at {}'.format(path))
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lineno = 0
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for line in open(path):
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lineno += 1
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# handle line continuation
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if line.endswith('\\\n'):
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buffer += line[:-2]
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continue
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else:
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line = buffer + line
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buffer = ''
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# filter out comments and empty lines
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line = line.strip()
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if not line or line.startswith('#'):
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continue
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# Separator ',' is normally optional but we make it mandatory here as
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# it generally improves the readability of the rules.
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for clause_match in comma_separated_group_re.finditer(line):
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clause = clause_match.group().strip()
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if not (no_args_tests.match(clause) or args_tests.match(clause) or
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no_args_assign.match(clause) or args_assign.match(clause) or
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program_assign.match(clause)):
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print('Invalid line {}:{}: {}'.format(path, lineno, line))
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print(' clause:', clause)
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print()
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result = 1
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break
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sys.exit(result)
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