[deliverable/linux.git] / scripts / headers_install.pl

#!/usr/bin/perl -w
#
# headers_install prepare the listed header files for use in
# user space and copy the files to their destination.
#
# Usage: headers_install.pl readdir installdir arch [files...]
# installdir: dir to install the files to
# arch:       current architecture
#             arch is used to force a reinstallation when the arch
#             changes because kbuild then detect a command line change.
# files:      list of files to check
#
# Step in preparation for users space:
# 1) Drop all use of compiler.h definitions
# 2) Drop include of compiler.h
# 3) Drop all sections defined out by __KERNEL__ (using unifdef)

use strict;

my ($installdir, $arch, @files) = @ARGV;

my $unifdef = "scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__";

foreach my $filename (@files) {
	my $file = $filename;
	$file =~ s!^.*/!!;

	my $tmpfile = "$installdir/$file.tmp";

	open(my $in, '<', $filename)
	    or die "$filename: $!\n";
	open(my $out, '>', $tmpfile)
	    or die "$tmpfile: $!\n";
	while (my $line = <$in>) {
		$line =~ s/([\s(])__user\s/$1/g;
		$line =~ s/([\s(])__force\s/$1/g;
		$line =~ s/([\s(])__iomem\s/$1/g;
		$line =~ s/\s__attribute_const__\s/ /g;
		$line =~ s/\s__attribute_const__$//g;
		$line =~ s/\b__packed\b/__attribute__((packed))/g;
		$line =~ s/^#include <linux\/compiler.h>//;
		$line =~ s/(^|\s)(inline)\b/$1__$2__/g;
		$line =~ s/(^|\s)(asm)\b(\s|[(]|$)/$1__$2__$3/g;
		$line =~ s/(^|\s|[(])(volatile)\b(\s|[(]|$)/$1__$2__$3/g;
		$line =~ s/#ifndef\s+_UAPI/#ifndef /;
		$line =~ s/#define\s+_UAPI/#define /;
		$line =~ s!#endif\s+/[*]\s*_UAPI!#endif /* !;
		printf {$out} "%s", $line;
	}
	close $out;
	close $in;

	system $unifdef . " $tmpfile > $installdir/$file";
	# unifdef will exit 0 on success, and will exit 1 when the
	# file was processed successfully but no changes were made,
	# so abort only when it's higher than that.
	my $e = $? >> 8;
	if ($e > 1) {
		die "$tmpfile: $!\n";
	}
	unlink $tmpfile;
}
exit 0;
Commit	Line	Data
	1	#!/usr/bin/perl -w
	2	#
	3	# headers_install prepare the listed header files for use in
	4	# user space and copy the files to their destination.
	5	#
	6	# Usage: headers_install.pl readdir installdir arch [files...]
	7	# installdir: dir to install the files to
	8	# arch: current architecture
	9	# arch is used to force a reinstallation when the arch
	10	# changes because kbuild then detect a command line change.
	11	# files: list of files to check
	12	#
	13	# Step in preparation for users space:
	14	# 1) Drop all use of compiler.h definitions
	15	# 2) Drop include of compiler.h
	16	# 3) Drop all sections defined out by __KERNEL__ (using unifdef)
	17
	18	use strict;
	19
	20	my ($installdir, $arch, @files) = @ARGV;
	21
	22	my $unifdef = "scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__";
	23
	24	foreach my $filename (@files) {
	25	my $file = $filename;
	26	$file =~ s!^.*/!!;
	27
	28	my $tmpfile = "$installdir/$file.tmp";
	29
	30	open(my $in, '<', $filename)
	31	or die "$filename: $!\n";
	32	open(my $out, '>', $tmpfile)
	33	or die "$tmpfile: $!\n";
	34	while (my $line = <$in>) {
	35	$line =~ s/([\s(])__user\s/$1/g;
	36	$line =~ s/([\s(])__force\s/$1/g;
	37	$line =~ s/([\s(])__iomem\s/$1/g;
	38	$line =~ s/\s__attribute_const__\s/ /g;
	39	$line =~ s/\s__attribute_const__$//g;
	40	$line =~ s/\b__packed\b/__attribute__((packed))/g;
	41	$line =~ s/^#include <linux\/compiler.h>//;
	42	$line =~ s/(^\|\s)(inline)\b/$1__$2__/g;
	43	$line =~ s/(^\|\s)(asm)\b(\s\|[(]\|$)/$1__$2__$3/g;
	44	$line =~ s/(^\|\s\|[(])(volatile)\b(\s\|[(]\|$)/$1__$2__$3/g;
	45	$line =~ s/#ifndef\s+_UAPI/#ifndef /;
	46	$line =~ s/#define\s+_UAPI/#define /;
	47	$line =~ s!#endif\s+/[]\s_UAPI!#endif /* !;
	48	printf {$out} "%s", $line;
	49	}
	50	close $out;
	51	close $in;
	52
	53	system $unifdef . " $tmpfile > $installdir/$file";
	54	# unifdef will exit 0 on success, and will exit 1 when the
	55	# file was processed successfully but no changes were made,
	56	# so abort only when it's higher than that.
	57	my $e = $? >> 8;
	58	if ($e > 1) {
	59	die "$tmpfile: $!\n";
	60	}
	61	unlink $tmpfile;
	62	}
	63	exit 0;