scripts/headers_install.pl

   1 #!/usr/bin/perl
   2 #
   3 # headers_install prepare the listed header files for use in
   4 # user space and copy the files to their destination.
   5 #
   6 # Usage: headers_install.pl odir installdir [files...]
   7 # odir:    dir to open files
   8 # install: dir to install the files
   9 # files:   list of files to check
  10 #
  11 # Step in preparation for users space:
  12 # 1) Drop all use of compiler.h definitions
  13 # 2) Drop include of compiler.h
  14 # 3) Drop all sections defined out by __KERNEL__ (using unifdef)
  15
  16 use strict;
  17 use warnings;
  18
  19 my ($readdir, $installdir, @files) = @ARGV;
  20
  21 my $unifdef = "scripts/unifdef -U__KERNEL__";
  22
  23 foreach my $file (@files) {
  24         my $tmpfile = "$installdir/$file.tmp";
  25         open(my $infile, '<', "$readdir/$file")
  26                 or die "$readdir/$file: $!\n";
  27         open(my $outfile, '>', "$tmpfile") or die "$tmpfile: $!\n";
  28         while (my $line = <$infile>) {
  29                 $line =~ s/([\s(])__user\s/$1/g;
  30                 $line =~ s/([\s(])__force\s/$1/g;
  31                 $line =~ s/([\s(])__iomem\s/$1/g;
  32                 $line =~ s/\s__attribute_const__\s/ /g;
  33                 $line =~ s/\s__attribute_const__$//g;
  34                 $line =~ s/^#include <linux\/compiler.h>//;
  35                 printf $outfile "%s", $line;
  36         }
  37         close $outfile;
  38         close $infile;
  39         system $unifdef . " $tmpfile > $installdir/$file";
  40         unlink $tmpfile;
  41 }
  42 exit 0;