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
   8 use strict;
   9
  10 $| = 1;
  11
  12 my $debugging;
  13
  14 foreach 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 }