LXR linux/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    # Open this file.
  16    open( my $f, '<', $file )
  17      or die "Can't open $file: $!\n";
  18
  19    # Initialize variables.
  20    my ($fInComment, $fInString, $fUseVersion);
  21    my $iLinuxVersion = 0;
  22
  23    while (<$f>) {
  24        # Strip comments.
  25        $fInComment && (s+^.*?\*/+ +o ? ($fInComment = 0) : next);
  26        m+/\*+o && (s+/\*.*?\*/+ +go, (s+/\*.*$+ +o && ($fInComment = 1)));
  27
  28        # Pick up definitions.
  29        if ( m/^\s*#/o ) {
  30            $iLinuxVersion      = $. if m/^\s*#\s*include\s*"linux\/version\.h"/o;
  31        }
  32
  33        # Strip strings.
  34        $fInString && (s+^.*?"+ +o ? ($fInString = 0) : next);
  35        m+"+o && (s+".*?"+ +go, (s+".*$+ +o && ($fInString = 1)));
  36
  37        # Pick up definitions.
  38        if ( m/^\s*#/o ) {
  39            $iLinuxVersion      = $. if m/^\s*#\s*include\s*<linux\/version\.h>/o;
  40        }
  41
  42        # Look for uses: LINUX_VERSION_CODE, KERNEL_VERSION, UTS_RELEASE
  43        if (($_ =~ /LINUX_VERSION_CODE/) || ($_ =~ /\WKERNEL_VERSION/)) {
  44            $fUseVersion = 1;
  45            last if $iLinuxVersion;
  46        }
  47    }
  48
  49    # Report used version IDs without include?
  50    if ($fUseVersion && ! $iLinuxVersion) {
  51        print "$file: $.: need linux/version.h\n";
  52    }
  53
  54    # Report superfluous includes.
  55    if ($iLinuxVersion && ! $fUseVersion) {
  56        print "$file: $iLinuxVersion linux/version.h not needed.\n";
  57    }
  58
  59    # debug: report OK results:
  60    if ($debugging) {
  61        if ($iLinuxVersion && $fUseVersion) {
  62            print "$file: version use is OK ($iLinuxVersion)\n";
  63        }
  64        if (! $iLinuxVersion && ! $fUseVersion) {
  65            print "$file: version use is OK (none)\n";
  66        }
  67    }
  68
  69    close($f);
  70}
  71