scripts/checkversion.pl

   1 #! /usr/bin/perl
   2 #
   3 # checkversion find uses of LINUX_VERSION_CODE, KERNEL_VERSION, or
   4 # UTS_RELEASE without including <linux/version.h>, or cases of
   5 # including <linux/version.h> that don't need it.
   6 # Copyright (C) 2003, Randy Dunlap <rddunlap@osdl.org>
   7
   8 $| = 1;
   9
  10 my $debugging = 0;
  11
  12 foreach $file (@ARGV)
  13 {
  14     # Open this file.
  15     open(FILE, $file) || die "Can't open $file: $!\n";
  16
  17     # Initialize variables.
  18     my $fInComment   = 0;
  19     my $fInString    = 0;
  20     my $fUseVersion   = 0;
  21     my $iLinuxVersion = 0;
  22
  23     LINE: while ( <FILE> )
  24     {
  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/) || ($_ =~ /\WKERNEL_VERSION/) ||
  45                 ($_ =~ /UTS_RELEASE/)) {
  46             $fUseVersion = 1;
  47             last LINE if $iLinuxVersion;
  48         }
  49     }
  50
  51     # Report used version IDs without include?
  52     if ($fUseVersion && ! $iLinuxVersion) {
  53         print "$file: $.: need linux/version.h\n";
  54     }
  55
  56     # Report superfluous includes.
  57     if ($iLinuxVersion && ! $fUseVersion) {
  58         print "$file: $iLinuxVersion linux/version.h not needed.\n";
  59     }
  60
  61     # debug: report OK results:
  62     if ($debugging) {
  63         if ($iLinuxVersion && $fUseVersion) {
  64             print "$file: version use is OK ($iLinuxVersion)\n";
  65         }
  66         if (! $iLinuxVersion && ! $fUseVersion) {
  67             print "$file: version use is OK (none)\n";
  68         }
  69     }
  70
  71     close(FILE);
  72 }