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181 lines
4.6 KiB
Perl
Executable file
181 lines
4.6 KiB
Perl
Executable file
#!/usr/bin/perl
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# this software is licensed for use under the Free Software Foundation's GPL v3.0 license, as retrieved
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# from http://www.gnu.org/licenses/gpl-3.0.html on 2014-11-17. A copy should also be available in this
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# project's Git repository at https://github.com/jimsalterjrs/sanoid/blob/master/LICENSE.
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use strict;
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use warnings;
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my $zfs = '/sbin/zfs';
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my %args = getargs(@ARGV);
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my $progversion = '1.4.7';
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if ($args{'version'}) { print "$progversion\n"; exit 0; }
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my $dataset = getdataset($args{'path'});
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my %versions = getversions($args{'path'}, $dataset);
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foreach my $version (sort { $versions{$a}{'mtime'} <=> $versions{$b}{'mtime'} } keys %versions) {
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my $disptime = localtime($versions{$version}{'mtime'});
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my $dispsize = humansize($versions{$version}{'size'});
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print "$disptime\t$dispsize\t$version\n";
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}
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exit 0;
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###################################################################
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###################################################################
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###################################################################
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sub humansize {
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my ($rawsize) = @_;
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my $humansize;
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if ($rawsize > 1024*1024*1024) {
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$humansize = sprintf("%.1f",$rawsize/1024/1024/1024) . ' GB';
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} elsif ($rawsize > 1024*1024) {
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$humansize = sprintf("%.1f",$rawsize/1024/1024) . ' MB';
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} elsif ($rawsize > 255) {
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$humansize = sprintf("%.1f",$rawsize/1024) . ' KB';
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} else {
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$humansize = $rawsize . ' Bytes';
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}
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return $humansize;
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}
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sub getversions {
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my ($path, $dataset) = @_;
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my @snaps = findsnaps($dataset, $args{'path'});
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my $snappath = '.zfs/snapshot';
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my $relpath = $path;
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$relpath =~ s/^$dataset\///;
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my %versions;
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foreach my $snap (@snaps) {
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my $filename = "$dataset/$snappath/$snap/$relpath";
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my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks) = stat($filename);
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# only push to the $versions hash if this size and mtime aren't already present (simple dedupe)
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my $duplicate = 0;
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foreach my $version (keys %versions) {
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if ($versions{$version}{'size'} eq $size && $versions{$version}{'mtime'} eq $mtime) {
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$duplicate = 1;
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}
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}
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if (! $duplicate) {
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$versions{$filename}{'size'} = $size;
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$versions{$filename}{'mtime'} = $mtime;
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}
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}
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return %versions;
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}
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sub findsnaps {
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my ($dataset, $path) = @_;
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my $snappath = '.zfs/snapshot';
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my $relpath = $path;
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$relpath =~ s/^$dataset//;
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my @snaps;
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opendir (my $dh, "$dataset/$snappath");
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while (my $dir=(readdir $dh)) {
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if ($dir ne '.' && $dir ne '..') { push @snaps, $dir; }
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}
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closedir $dh;
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return @snaps;
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}
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sub getdataset {
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my ($path) = @_;
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open FH, "$zfs list -Ho mountpoint |";
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my @datasets = <FH>;
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close FH;
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my @matchingdatasets;
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foreach my $dataset (@datasets) {
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chomp $dataset;
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if ( $path =~ /^$dataset/ ) { push @matchingdatasets, $dataset; }
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}
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my $bestmatch = '';
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foreach my $dataset (@matchingdatasets) {
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if ( length $dataset > length $bestmatch ) { $bestmatch = $dataset; }
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}
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return $bestmatch;
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}
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sub getargs {
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my @args = @_;
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my %args;
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my %novaluearg;
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my %validarg;
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push my @validargs, ('debug','version');
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foreach my $item (@validargs) { $validarg{$item} = 1; }
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push my @novalueargs, ('debug','version');
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foreach my $item (@novalueargs) { $novaluearg{$item} = 1; }
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while (my $rawarg = shift(@args)) {
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my $arg = $rawarg;
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my $argvalue;
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if ($rawarg =~ /=/) {
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# user specified the value for a CLI argument with =
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# instead of with blank space. separate appropriately.
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$argvalue = $arg;
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$arg =~ s/=.*$//;
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$argvalue =~ s/^.*=//;
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}
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if ($rawarg =~ /^--/) {
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# doubledash arg
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$arg =~ s/^--//;
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if (! $validarg{$arg}) { die "ERROR: don't understand argument $rawarg.\n"; }
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if ($novaluearg{$arg}) {
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$args{$arg} = 1;
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} else {
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# if this CLI arg takes a user-specified value and
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# we don't already have it, then the user must have
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# specified with a space, so pull in the next value
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# from the array as this value rather than as the
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# next argument.
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if ($argvalue eq '') { $argvalue = shift(@args); }
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$args{$arg} = $argvalue;
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}
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} elsif ($arg =~ /^-/) {
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# singledash arg
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$arg =~ s/^-//;
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if (! $validarg{$arg}) { die "ERROR: don't understand argument $rawarg.\n"; }
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if ($novaluearg{$arg}) {
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$args{$arg} = 1;
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} else {
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# if this CLI arg takes a user-specified value and
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# we don't already have it, then the user must have
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# specified with a space, so pull in the next value
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# from the array as this value rather than as the
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# next argument.
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if ($argvalue eq '') { $argvalue = shift(@args); }
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$args{$arg} = $argvalue;
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}
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} else {
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# bare arg
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$args{'path'} = $arg;
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}
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}
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return %args;
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}
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