131 lines
3.9 KiB
Perl
131 lines
3.9 KiB
Perl
#!/usr/bin/perl
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use strict;
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use warnings;
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use POSIX qw(strftime);
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use File::Path;
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use File::Basename;
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use esmith::ConfigDB;
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use esmith::AccountsDB;
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# Routines taken from powershift of rlbackup
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sub stagger;
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sub powershift;
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sub shadowdir;
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sub rmshadow;
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my $cdb = esmith::ConfigDB->open_ro;
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my $adb = esmith::AccountsDB->open_ro();
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my $smb = $cdb->get('smb') or die "No smb db entry found\n";
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my $shadowdir = $smb->prop('ShadowDir') || '/home/e-smith/files/.shadow';
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my $shadowcopy = $smb->prop('ShadowCopy') || 'disabled';
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my $offset = ($smb->prop('ShadowCount') || 2) - 2;
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$offset = 0 if $offset < 0;
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exit unless -d $shadowdir;
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exit if $shadowcopy eq 'disabled';
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my $filesdir = '/home/e-smith/files';
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my $snapfmt = '@GMT-%Y.%m.%d-%H.%M.%S';
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# Switch old shadow directories to new format
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opendir(SHADOW, $shadowdir);
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foreach my $s ( grep { /^\d/ && ! -l "$shadowdir/$_" && -d "$shadowdir/$_" } readdir SHADOW ) {
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my @stat = stat("$shadowdir/$s");
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rename "$shadowdir/$s", "$shadowdir/".strftime($snapfmt, gmtime($stat[9]));
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symlink strftime($snapfmt, gmtime($stat[9])), "$shadowdir/$s";
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}
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closedir(SHADOW);
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# remove old symlinks in ibays
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foreach my $ibay ($adb->ibays()) {
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my $ibaydir = 'ibays/' . $ibay->key . ( $ibay->prop('PublicAccess') eq 'none' ? '/files' : '' );
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opendir(IBAY, "$filesdir/$ibaydir") || next;
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unlink "$filesdir/$ibaydir/$_" foreach (grep /^\@GMT-/, readdir(IBAY));
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closedir(IBAY);
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}
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# remove old symlinks in ibays
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foreach my $user ($adb->users()) {
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my $userdir = 'users/' . $user->key . '/home';
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opendir(USER, "$filesdir/$userdir") || next;
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unlink "$filesdir/$userdir/$_" foreach (grep /^\@GMT-/, readdir(USER));
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closedir(USER);
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}
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# Create sync point if it doesn't already exist
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my $snapdir = strftime($snapfmt, gmtime(time));
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if ( -d "$shadowdir/0" ) {
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rename "$shadowdir/".readlink("$shadowdir/0"), "$shadowdir/$snapdir";
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unlink "$shadowdir/0";
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} else {
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mkdir "$shadowdir/$snapdir";
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}
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symlink "$snapdir", "$shadowdir/0";
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# Create list of ibays and users to shadow
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my ($ibays, $users, $link) = ('','','');
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my @ibays = grep { ($_->prop('ShadowCopy') || 'enabled') ne 'disabled' } $adb->ibays();
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$ibays = "$filesdir/./ibays/{" . join(',', map { $_->key } @ibays) . "}/" if scalar @ibays > 1;
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$ibays = "$filesdir/./ibays/" . $ibays[0]->key . "/" if scalar @ibays == 1;
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my @users = grep { ($_->prop('ShadowCopy') || 'enabled') ne 'disabled' } $adb->users();
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$users = "$filesdir/./users/{" . join(',', map { $_->key } @users) . "}/home/" if scalar @users > 1;
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$users = "$filesdir/./users/" . $users[0]->key . "/home/" if scalar @users == 1;
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$link = "--link-dest ../1" if -d "$shadowdir/1";
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# Sync directories to shadow directory
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if ( $ibays || $users) {
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system("rsync -aHmR --partial --delete --delete-excluded --exclude 'aquota.*' $link $ibays $users $shadowdir/0/") == 0
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or die "Couldn't sync directories";
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}
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# Shift directories using geometric roll-off (only if different)
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if ( -d "$shadowdir/1" ) {
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if (system("diff -qr $shadowdir/0 $shadowdir/1 &> /dev/null") == 0) {
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rmshadow("$shadowdir/0");
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} else {
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powershift(2) if -d shadowdir(-$offset);
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for (my $i=2; $i >= -$offset; $i--) {
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rename shadowdir($i), shadowdir($i+1)
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}
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}
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} else {
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rename "$shadowdir/0", "$shadowdir/1";
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}
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sub rmshadow {
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my $d = shift;
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if ( -l "$d" ) {
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rmtree dirname($d)."/".readlink($d);
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unlink "$d";
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} elsif ( -d "$d" ) {
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rmtree "$d"
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}
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}
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sub shadowdir {
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my $i = shift;
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return "$shadowdir/".($i+$offset);
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}
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sub stagger {
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my $i = shift;
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return $i + ($i >> 1);
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}
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sub powershift {
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my $i = shift;
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if ( -d shadowdir(stagger($i)) ) {
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my $n = powershift($i << 1);
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$i = $n >> 1;
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rename shadowdir(stagger($i)), shadowdir($n) if -d shadowdir(stagger($i));
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rmshadow(shadowdir($i));
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} else {
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rename shadowdir($i), shadowdir(stagger($i)) if -d shadowdir($i);
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}
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return $i;
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}
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