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#!/opt/bin/perl |
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# inspired by treescan by Jamie Lokier <jamie@imbolc.ucc.ie> |
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# about 40% faster than the original version (on my fs and raid :) |
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use strict; |
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use Getopt::Long; |
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use Time::HiRes (); |
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use IO::AIO; |
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our $VERSION = $IO::AIO::VERSION; |
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Getopt::Long::Configure ("bundling", "no_ignore_case", "require_order", "auto_help", "auto_version"); |
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my ($opt_silent, $opt_print0, $opt_stat, $opt_nodirs, |
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$opt_nofiles, $opt_grep, $opt_progress); |
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GetOptions |
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"quiet|q" => \$opt_silent, |
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"print0|0" => \$opt_print0, |
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"stat|s" => \$opt_stat, |
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"dirs|d" => \$opt_nofiles, |
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"files|f" => \$opt_nodirs, |
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"grep|g=s" => \$opt_grep, |
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"progress|p" => \$opt_progress, |
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or die "Usage: try $0 --help"; |
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@ARGV = "." unless @ARGV; |
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$opt_grep &&= qr{$opt_grep}s; |
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my ($n_dirs, $n_files, $n_stats) = (0, 0, 0); |
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my $n_last; |
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my $n_start = Time::HiRes::time; |
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sub printfn { |
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my ($prefix, $files, $suffix) = @_; |
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if ($opt_grep) { |
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@$files = grep "$prefix$_" =~ $opt_grep, @$files; |
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} |
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if ($opt_print0) { |
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print map "$prefix$_$suffix\0", @$files; |
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} elsif (!$opt_silent) { |
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print map "$prefix$_$suffix\n", @$files; |
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} |
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} |
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sub scan { |
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my ($path) = @_; |
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$path .= "/"; |
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IO::AIO::poll_cb; |
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if ($opt_progress and $n_last + 1 < Time::HiRes::time) { |
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$n_last = Time::HiRes::time; |
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printf STDERR "%d dirs %d files %d stats %g stats/s \r", $n_dirs, $n_files, $n_stats, $n_stats / ($n_last - $n_start) |
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if $opt_progress; |
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} |
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aioreq_pri -1; |
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++$n_dirs; |
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aio_scandir $path, 8, sub { |
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my ($dirs, $files) = @_ |
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or warn "$path: $!\n"; |
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printfn "", [$path] unless $opt_nodirs; |
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printfn $path, $files unless $opt_nofiles; |
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$n_files += @$files; |
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if ($opt_stat) { |
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aio_wd $path, sub { |
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my $wd = shift; |
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aio_lstat [$wd, $_] for @$files; |
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$n_stats += @$files; |
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}; |
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} |
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&scan ("$path$_") for @$dirs; |
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}; |
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} |
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IO::AIO::max_outstanding 100; # two fds per directory, so limit accordingly |
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IO::AIO::min_parallel 20; |
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for my $seed (@ARGV) { |
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$seed =~ s/\/+$//; |
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++$n_stats; |
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aio_lstat "$seed/.", sub { |
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if ($_[0]) { |
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print STDERR "$seed: $!\n"; |
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} elsif (-d _) { |
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scan $seed; |
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} else { |
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printfn "", $seed, "/"; |
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} |
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}; |
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} |
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IO::AIO::flush; |
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