1#!/usr/bin/python
2# Simple udev rules syntax checker
3#
4# (C) 2010 Canonical Ltd.
5# Author: Martin Pitt <martin.pitt@ubuntu.com>
6#
7# This program is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 2 of the License, or
10# (at your option) any later version.
11#
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License along
18# with this program; if not, write to the Free Software Foundation, Inc.,
19# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20
21import re
22import sys
23
24if len(sys.argv) < 2:
25    print >> sys.stderr, 'Usage: %s <rules file> [...]' % sys.argv[0]
26    sys.exit(2)
27
28no_args_tests = re.compile('(ACTION|DEVPATH|KERNELS?|NAME|SYMLINK|SUBSYSTEMS?|DRIVERS?|TAG|RESULT|TEST)\s*(?:=|!)=\s*"([^"]*)"$')
29args_tests = re.compile('(ATTRS?|ENV|TEST){([a-zA-Z0-9/_.*%-]+)}\s*(?:=|!)=\s*"([^"]*)"$')
30no_args_assign = re.compile('(NAME|SYMLINK|OWNER|GROUP|MODE|TAG|PROGRAM|RUN|LABEL|GOTO|WAIT_FOR|OPTIONS|IMPORT)\s*(?:\+=|:=|=)\s*"([^"]*)"$')
31args_assign = re.compile('(ATTR|ENV|IMPORT|RUN){([][a-zA-Z0-9/_.*%-]+)}\s*(=|==|\+=)\s*"([^"]*)"$')
32
33result = 0
34buffer = ''
35for path in sys.argv[1:]:
36    lineno = 0
37    for line in open(path):
38        lineno += 1
39
40        # handle line continuation
41        if line.endswith('\\\n'):
42            buffer += line[:-2]
43            continue
44        else:
45            line = buffer + line
46            buffer = ''
47
48        # filter out comments and empty lines
49        line = line.strip()
50        if not line or line.startswith('#'):
51            continue
52
53        for clause in line.split(','):
54            clause = clause.strip()
55            if not (no_args_tests.match(clause) or args_tests.match(clause) or
56                    no_args_assign.match(clause) or args_assign.match(clause)):
57
58                print('Invalid line %s:%i: %s' % (path, lineno, line))
59                print('  clause:', clause)
60                print()
61                result = 1
62                break
63
64sys.exit(result)
65