tools/fs-walk

#!/usr/bin/perl -w
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
#
# traverse the entire filesystem dumping info.
#
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/$_");
    }
}