#!/usr/bin/perl -w# vi: set ts=4:# Copyright (c) 2001 David Schleef <ds@schleef.org># Copyright (c) 2001 Erik Andersen <andersen@codepoet.org># Copyright (c) 2001 Stuart Hughes <stuarth@lineo.com># This program is free software; you can redistribute it and/or modify it # under the same terms as Perl itself.# TODO -- use strict mode...#use strict;use Getopt::Long;use File::Find;# Set up some default valuesmy $basedir="";my $kernel;my $kernelsyms;my $stdout=1;my $verbose=0;# get command-line optionsmy %opt;GetOptions(	\%opt,	"help|h",	"basedir|b=s" => \$basedir,	"kernel|k=s" => \$kernel,	"kernelsyms|F=s" => \$kernelsyms,	"stdout|n" => \$stdout,	"verbose|v" => \$verbose,);if (defined $opt{help}) {	print		"$0 [OPTION]... [basedir]\n",		"\t-h --help\t\tShow this help screen\n",		"\t-b --basedir\t\tModules base directory (defaults to /lib/modules)\n",		"\t-k --kernel\t\tKernel binary for the target\n",		"\t-F --kernelsyms\t\tKernel symbol file\n",		"\t-n --stdout\t\tWrite to stdout instead of modules.dep\n",		"\t-v --verbose\t\tPrint out lots of debugging stuff\n",	;	exit 1;}if($basedir !~ m-/lib/modules-) {    warn "WARNING: base directory does not match ..../lib/modules\n";}# Find the list of .o files living under $basedir #if ($verbose) { printf "Locating all modules\n"; }my($file) = "";my(@liblist) = ();find sub { 	if ( -f $_  && ! -d $_ ) { 		$file = $File::Find::name;		if ( $file =~ /.o$/ ) {			push(@liblist, $file);			if ($verbose) { printf "$file\n"; }		}	}}, $basedir;if ($verbose) { printf "Finished locating modules\n"; }foreach $obj ( @liblist, $kernel ){    # turn the input file name into a target tag name    # vmlinux is a special that is only used to resolve symbols    if($obj =~ /vmlinux/) {        $tgtname = "vmlinux";    } else {        ($tgtname) = $obj =~ m-(/lib/modules/.*)$-;    }    warn "MODULE = $tgtname\n" if $verbose;    # get a list of symbols	@output=`nm $obj`;	$ksymtab=grep m/ __ksymtab/, @output;    # gather the exported symbols	if($ksymtab){        # explicitly exported        foreach ( @output ) {            / __ksymtab_(.*)$/ and do {                warn "sym = $1\n" if $verbose;                $exp->{$1} = $tgtname;            };        }	} else {        # exporting all symbols        foreach ( @output) {            / [ABCDGRST] (.*)$/ and do {                warn "syma = $1\n" if $verbose;                $exp->{$1} = $tgtname;            };        }	}    # gather the unresolved symbols    foreach ( @output ) {        !/ __this_module/ && / U (.*)$/ and do {            warn "und = $1\n" if $verbose;            push @{$dep->{$tgtname}}, $1;        };    }}# reduce dependancies: remove unresolvable and resolved from vmlinux# remove duplicatesforeach $module (keys %$dep) {    $mod->{$module} = {};    foreach (@{$dep->{$module}}) {        if( $exp->{$_} ) {             warn "resolved symbol $_ in file $exp->{$_}\n" if $verbose;            next if $exp->{$_} =~ /vmlinux/;            $mod->{$module}{$exp->{$_}} = 1;        } else {            warn "unresolved symbol $_ in file $module\n";        }    } }# resolve the dependancies for each moduleforeach $module ( keys %$mod )  {    print "$module:\t";    @sorted = sort bydep keys %{$mod->{$module}};    print join(" \\\n\t",@sorted);#    foreach $m (@sorted ) {#        print "\t$m\n";#    }    print "\n\n";}sub bydep{    foreach my $f ( keys %{$mod->{$b}} ) {        if($f eq $a) {            return 1;        }    }    return -1;}__END__=head1 NAMEdepmod.pl - a cross platform script to generate kernel module dependency		lists which can then be used by modprobe.=head1 SYNOPSISdepmod.pl [OPTION]... [FILE]...Example:	depmod.pl -F linux/System.map target/lib/modules=head1 DESCRIPTIONThe purpose of this script is to automagically generate a list of of kernelmodule dependancies.  This script produces dependancy lists that should beidentical to the depmod program from the modutils package.  Unlike the depmodbinary, however, depmod.pl is designed to be run on your host system, noton your target system.This script was written by David Schleef <ds@schleef.org> to be used inconjunction with the BusyBox modprobe applet.=head1 OPTIONS=over 4=item B<-h --help>This displays the help message.=item B<-b --basedir>The base directory uner which the target's modules will be found.  Thisdefaults to the /lib/modules directory.=item B<-k --kernel>Kernel binary for the target.  You must either supply a kernel binaryor a kernel symbol file (using the -F option).=item B<-F --kernelsyms>Kernel symbol file for the target.  You must supply either a kernel symbol filekernel binary for the target (using the -k option).=item B<-n --stdout>Write to stdout instead of modules.dep.  This is currently hard coded...kernel binary for the target (using the -k option).=item B<--verbose>Be verbose (not implemented)=back=head1 COPYRIGHTCopyright (c) 2001 David Schleef <ds@schleef.org>Copyright (c) 2001 Erik Andersen <andersen@codepoet.org>Copyright (c) 2001 Stuart Hughes <stuarth@lineo.com>This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.=head1 AUTHORDavid Schleef <ds@schleef.org>=cut# $Id: depmod.pl,v 1.2 2001/11/19 23:57:54 andersen Exp $