Root/scripts/checkversion.pl

1#! /usr/bin/perl
2#
3# checkversion find uses of LINUX_VERSION_CODE or KERNEL_VERSION
4# without including <linux/version.h>, or cases of
5# including <linux/version.h> that don't need it.
6# Copyright (C) 2003, Randy Dunlap <rdunlap@xenotime.net>
7
8use strict;
9
10$| = 1;
11
12my $debugging;
13
14foreach my $file (@ARGV) {
15    next if $file =~ "include/linux/version\.h";
16    # Open this file.
17    open( my $f, '<', $file )
18      or die "Can't open $file: $!\n";
19
20    # Initialize variables.
21    my ($fInComment, $fInString, $fUseVersion);
22    my $iLinuxVersion = 0;
23
24    while (<$f>) {
25    # Strip comments.
26    $fInComment && (s+^.*?\*/+ +o ? ($fInComment = 0) : next);
27    m+/\*+o && (s+/\*.*?\*/+ +go, (s+/\*.*$+ +o && ($fInComment = 1)));
28
29    # Pick up definitions.
30    if ( m/^\s*#/o ) {
31        $iLinuxVersion = $. if m/^\s*#\s*include\s*"linux\/version\.h"/o;
32    }
33
34    # Strip strings.
35    $fInString && (s+^.*?"+ +o ? ($fInString = 0) : next);
36    m+"+o && (s+".*?"+ +go, (s+".*$+ +o && ($fInString = 1)));
37
38    # Pick up definitions.
39    if ( m/^\s*#/o ) {
40        $iLinuxVersion = $. if m/^\s*#\s*include\s*<linux\/version\.h>/o;
41    }
42
43    # Look for uses: LINUX_VERSION_CODE, KERNEL_VERSION, UTS_RELEASE
44    if (($_ =~ /LINUX_VERSION_CODE/) || ($_ =~ /\WKERNEL_VERSION/)) {
45        $fUseVersion = 1;
46            last if $iLinuxVersion;
47        }
48    }
49
50    # Report used version IDs without include?
51    if ($fUseVersion && ! $iLinuxVersion) {
52    print "$file: $.: need linux/version.h\n";
53    }
54
55    # Report superfluous includes.
56    if ($iLinuxVersion && ! $fUseVersion) {
57    print "$file: $iLinuxVersion linux/version.h not needed.\n";
58    }
59
60    # debug: report OK results:
61    if ($debugging) {
62        if ($iLinuxVersion && $fUseVersion) {
63        print "$file: version use is OK ($iLinuxVersion)\n";
64        }
65        if (! $iLinuxVersion && ! $fUseVersion) {
66        print "$file: version use is OK (none)\n";
67        }
68    }
69
70    close($f);
71}
72

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