#!/usr/bin/perl -w

#
#  Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
#  
#  This program is free software; you can redistribute it and/or modify it
#  under the terms of version 2 of the GNU General Public License as
#  published by the Free Software Foundation.
#  
#  This program is distributed in the hope that it would be useful, but
#  WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#  
#  Further, this software is distributed without any warranty that it is
#  free of the rightful claim of any third person regarding infringement
#  or the like.  Any license provided herein, whether implied or
#  otherwise, applies only to this software file.  Patent licenses, if
#  any, provided herein do not apply to combinations of this program with
#  other software, or any other product whatsoever.
#  
#  You should have received a copy of the GNU General Public License along
#  with this program; if not, write the Free Software Foundation, Inc., 59
#  Temple Place - Suite 330, Boston MA 02111-1307, USA.
#  
#  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
#  Mountain View, CA  94043, or:
#  
#  http://www.sgi.com 
#  
#  For further information regarding this notice, see: 
#  
#  http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
#

#
# traverse the entire filesystem dumping info. 
#
#                                                       dxm 5/10/00
use MD5;
use Getopt::Std;

my %opt;

sub scan($)
{
    my ($file)=@_;
    my ($md5)=new MD5;
    my (@stat);

    unless (@stat=lstat("$file")) {
        printf("%-" . ($opt{v}?65:32) . "s $file\n", "!!! could not lstat");
        return;
    }

    $stat[0]=$stat[8]=""; # wipe the device and access time
    $md5->reset;
    $md5->add(join(" ",@stat));
    
    print join(" ",@stat), "\n";
    
    if ($opt{v}) {
        print $md5->hexdigest . " ";
        $md5->reset;
    }

    if (-l "$file") {
        if (!defined($link = readlink $file)) {
            printf("%-32s $file\n", "!!! could not readlink");
            return;
        }
        $md5->add($link);
    } elsif (-f "$file") {
        if (!open(FILE, "$file")) {
            printf("%-32s $file\n", "!!! could not read");
            return;
        }
        $md5->addfile(FILE);
        close (FILE);
    }
    print $md5->hexdigest . " $file\n";
}

getopts('vs', \%opt);

die "Usage: $0 <dir>\n" unless (@ARGV == 1);

$dir=shift @ARGV;
die "can't read $dir\n" unless (-r $dir);
die "$dir is not a directory\n" unless (-d _);

chomp($HOST = `hostname -s`);

print "*** fs-walk host $HOST dir $dir\n";

@todo=$dir;
while ($dir = shift @todo) {
    scan($dir);
    unless (opendir(DIR,$dir)) {
        printf("%-" . ($opt{v}?65:32) . "s $dir\n", "!!! could not opendir");
        next;
    }
    unless (@all=readdir(DIR)) {
        printf("%-" . ($opt{v}?65:32) . "s $dir\n", "!!! could not readdir");
        next;
    }
    closedir(DIR);
    @dirs=grep(-d "$dir/$_" && !-l "$dir/$_", @all);
    foreach (@all) {
        next if /^\.\.?$/;
        scan("$dir/$_");
    }
    
    foreach (grep(!/^\.\.?$/, @dirs)) {
        push (@todo,"$dir/$_");
    }
}