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dpavlin |
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#!/bin/perl |
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#============================================================= -*-perl-*- |
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# |
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# BackupPC_archive: Archive files for an archive client. |
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# |
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# DESCRIPTION |
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# |
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# Usage: BackupPC_archive <user> <archiveclient> <reqFileName> |
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# |
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# AUTHOR |
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# Josh Marshall |
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# |
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# COPYRIGHT |
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# Copyright (C) 2001-2004 Craig Barratt |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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#======================================================================== |
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# |
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# Version 2.1.0, released 20 Jun 2004. |
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# |
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# See http://backuppc.sourceforge.net. |
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# |
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#======================================================================== |
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use strict; |
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no utf8; |
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use lib "__INSTALLDIR__/lib"; |
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use BackupPC::Lib; |
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use BackupPC::FileZIO; |
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use BackupPC::Xfer::Archive; |
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use vars qw( %ArchiveReq ); |
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########################################################################### |
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# Initialize |
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########################################################################### |
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die("BackupPC::Lib->new failed\n") if ( !(my $bpc = BackupPC::Lib->new) ); |
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my $TopDir = $bpc->TopDir(); |
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my $BinDir = $bpc->BinDir(); |
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my %Conf = $bpc->Conf(); |
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my $NeedPostCmd; |
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my($user, $host, $client, $reqFileName, %stat); |
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$bpc->ChildInit(); |
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if ( @ARGV != 3 ) { |
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print("usage: $0 <user> <archiveclient> <reqFileName>\n"); |
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exit(1); |
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} |
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$user = $1 if ( $ARGV[0] =~ /(.+)/ ); |
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$client = $1 if ( $ARGV[1] =~ /(.+)/ ); |
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if ( $ARGV[2] !~ /^([\w.]+)$/ ) { |
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print("$0: bad reqFileName (arg #3): $ARGV[2]\n"); |
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exit(1); |
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} |
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$reqFileName = $1; |
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my $startTime = time(); |
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my $Dir = "$TopDir/pc/$client"; |
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my @xferPid = (); |
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# |
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# Catch various signals |
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# |
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$SIG{INT} = \&catch_signal; |
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$SIG{ALRM} = \&catch_signal; |
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$SIG{TERM} = \&catch_signal; |
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$SIG{PIPE} = \&catch_signal; |
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$SIG{STOP} = \&catch_signal; |
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$SIG{TSTP} = \&catch_signal; |
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$SIG{TTIN} = \&catch_signal; |
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my $Pid = $$; |
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mkpath($Dir, 0, 0777) if ( !-d $Dir ); |
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if ( !-f "$Dir/LOCK" ) { |
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open(LOCK, ">", "$Dir/LOCK") && close(LOCK); |
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} |
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open(LOG, ">>", "$Dir/LOG"); |
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select(LOG); $| = 1; select(STDOUT); |
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# |
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# Read the request file |
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# |
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if ( !(my $ret = do "$Dir/$reqFileName") ) { |
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my $err; |
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if ( $@ ) { |
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$err = "couldn't parse $Dir/$reqFileName: $@"; |
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} elsif ( !defined($ret) ) { |
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$err = "couldn't do $Dir/$reqFileName: $!"; |
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} else { |
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$err = "couldn't run $Dir/$reqFileName"; |
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} |
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$stat{hostError} = $err; |
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exit(ArchiveCleanup($client)); |
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} |
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# |
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# Re-read config file, so we can include the PC-specific config |
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# |
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if ( defined(my $error = $bpc->ConfigRead($client)) ) { |
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$stat{hostError} = "Can't read PC's config file: $error"; |
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exit(ArchiveCleanup($client)); |
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} |
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%Conf = $bpc->Conf(); |
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# |
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# Make sure we eventually timeout if there is no activity from |
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# the data transport program. |
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# |
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alarm($Conf{ClientTimeout}); |
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# |
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# See if the host name is aliased |
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# |
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if ( $Conf{ClientNameAlias} ne "" ) { |
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$host = $Conf{ClientNameAlias}; |
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} else { |
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$host = $client; |
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} |
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# |
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# Setup file extension for compression and open ArchiveLOG output file |
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# |
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$Conf{CompressLevel} = 0 if ( !BackupPC::FileZIO->compOk ); |
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my $fileExt = $Conf{CompressLevel} > 0 ? ".z" : ""; |
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my $ArchiveLOG = BackupPC::FileZIO->open("$Dir/ArchiveLOG$fileExt", 1, |
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$Conf{CompressLevel}); |
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my($logMsg, $xfer); |
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$stat{xferOK} = 1; |
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$stat{hostAbort} = undef; |
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$stat{hostError} = $stat{lastOutputLine} = undef; |
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local(*RH, *WH); |
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# |
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# Run an optional pre-archive command |
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# |
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UserCommandRun("ArchivePreUserCmd"); |
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$NeedPostCmd = 1; |
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$xfer = BackupPC::Xfer::Archive->new($bpc); |
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# |
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# Run the transport program |
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# |
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my $xferArgs = { |
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client => $client, |
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host => $host, |
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user => $ArchiveReq{user}, |
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type => "archive", |
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XferLOG => $ArchiveLOG, |
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XferMethod => $Conf{XferMethod}, |
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pathHdrSrc => $ArchiveReq{pathHdrSrc}, |
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pathHdrDest => $ArchiveReq{pathHdrDest}, |
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HostList => \@{$ArchiveReq{HostList}}, |
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BackupList => \@{$ArchiveReq{BackupList}}, |
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archiveloc => $ArchiveReq{archiveloc}, |
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parfile => $ArchiveReq{parfile}, |
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compression => $ArchiveReq{compression}, |
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compext => $ArchiveReq{compext}, |
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splitsize => $ArchiveReq{splitsize}, |
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pidHandler => \&pidHandler, |
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}; |
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$xfer->args($xferArgs); |
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if ( !defined($logMsg = $xfer->start()) ) { |
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UserCommandRun("ArchivePostUserCmd") if ( $NeedPostCmd ); |
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$stat{hostError} = "xfer start failed: ", $xfer->errStr; |
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exit(ArchiveCleanup($client)); |
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} |
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print(LOG $bpc->timeStamp, "Starting archive\n"); |
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print("started_archive\n"); |
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$xfer->run(); |
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$stat{xferOK} = 0 if ( defined($stat{hostError} = $xfer->errStr) ); |
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alarm(0); |
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exit(ArchiveCleanup($client)); |
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########################################################################### |
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# Subroutines |
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########################################################################### |
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sub catch_signal |
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{ |
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my $signame = shift; |
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# |
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# Children quit quietly on ALRM |
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# |
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exit(1) if ( $Pid != $$ && $signame eq "ALRM" ); |
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# |
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# Ignore signals in children |
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# |
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return if ( $Pid != $$ ); |
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# |
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# Note: needs to be tested for each kind of XferMethod |
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# |
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print(LOG $bpc->timeStamp, "cleaning up after signal $signame\n"); |
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$SIG{$signame} = 'IGNORE'; |
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$ArchiveLOG->write(\"exiting after signal $signame\n"); |
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$stat{xferOK} = 0; |
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if ( $signame eq "INT" ) { |
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$stat{hostError} = "aborted by user (signal=$signame)"; |
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} else { |
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$stat{hostError} = "aborted by signal=$signame"; |
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} |
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exit(ArchiveCleanup($client)); |
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} |
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# |
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# Cleanup and update the archive status |
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# |
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sub ArchiveCleanup |
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{ |
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my($client) = @_; |
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$stat{xferOK} = 0 if ( $stat{hostError} || $stat{hostAbort} ); |
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if ( !$stat{xferOK} ) { |
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# |
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# Kill off the tranfer program, first nicely then forcefully. |
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# We use negative PIDs to make sure all processes in each |
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# group get the signal. |
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# |
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if ( @xferPid ) { |
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foreach my $pid ( @xferPid ) { |
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kill($bpc->sigName2num("INT"), -$pid); |
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} |
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sleep(1); |
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foreach my $pid ( @xferPid ) { |
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kill($bpc->sigName2num("KILL"), -$pid); |
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} |
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} |
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} |
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my $lastNum = -1; |
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my @Archives; |
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@Archives = $bpc->ArchiveInfoRead($client); |
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for ( my $i = 0 ; $i < @Archives ; $i++ ) { |
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$lastNum = $Archives[$i]{num} if ( $lastNum < $Archives[$i]{num} ); |
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} |
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$lastNum++; |
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# |
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# Run an optional post-archive command |
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# |
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UserCommandRun("ArchivePostUserCmd") if ( $NeedPostCmd ); |
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rename("$Dir/ArchiveLOG$fileExt", "$Dir/ArchiveLOG.$lastNum$fileExt"); |
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rename("$Dir/$reqFileName", "$Dir/ArchiveInfo.$lastNum"); |
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my $endTime = time(); |
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# |
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# If the archive failed, clean up |
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# |
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if ( !$stat{xferOK} ) { |
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$stat{hostError} = $stat{lastOutputLine} if ( $stat{hostError} eq "" ); |
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$stat{hostAbort} = 1; |
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$ArchiveLOG->write(\"Archive failed: $stat{hostError}") |
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if ( defined($ArchiveLOG) ); |
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} |
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$ArchiveLOG->close() if ( defined($ArchiveLOG) ); |
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# |
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# Add the new archive information to the archive file |
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# |
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@Archives = $bpc->ArchiveInfoRead($client); |
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my $i = @Archives; |
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$Archives[$i]{num} = $lastNum; |
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$Archives[$i]{startTime} = $startTime; |
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$Archives[$i]{endTime} = $endTime; |
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$Archives[$i]{result} = $stat{xferOK} ? "ok" : "failed"; |
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$Archives[$i]{errorMsg} = $stat{hostError}; |
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while ( @Archives > $Conf{ArchiveInfoKeepCnt} ) { |
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my $num = $Archives[0]{num}; |
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unlink("$Dir/ArchiveLOG.$num.z"); |
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unlink("$Dir/ArchiveLOG.$num"); |
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unlink("$Dir/ArchiveInfo.$num"); |
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shift(@Archives); |
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} |
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$bpc->ArchiveInfoWrite($client, @Archives); |
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if ( !$stat{xferOK} ) { |
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print(LOG $bpc->timeStamp, "Archive failed ($stat{hostError})\n"); |
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print("archive failed: $stat{hostError}\n"); |
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return 1; |
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} else { |
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print(LOG $bpc->timeStamp, "Archive Complete\n"); |
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print("archive complete\n"); |
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return; |
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} |
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} |
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# |
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# The Xfer method might tell us from time to time about processes |
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# it forks. We tell BackupPC about this (for status displays) and |
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# keep track of the pids in case we cancel the backup |
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# |
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sub pidHandler |
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{ |
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@xferPid = @_; |
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@xferPid = grep(/./, @xferPid); |
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return if ( !@xferPid ); |
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my @pids = @xferPid; |
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my $str = join(",", @pids); |
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$ArchiveLOG->write(\"Xfer PIDs are now $str\n") if ( defined($ArchiveLOG) ); |
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print("xferPids $str\n"); |
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} |
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# |
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# Run an optional pre- or post-dump command |
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# |
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sub UserCommandRun |
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{ |
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my($cmdType) = @_; |
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return if ( !defined($Conf{$cmdType}) ); |
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my $vars = { |
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xfer => $xfer, |
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client => $client, |
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host => $host, |
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user => $user, |
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share => $ArchiveReq{shareDest}, |
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XferMethod => $Conf{XferMethod}, |
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HostList => \@{$ArchiveReq{HostList}}, |
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BackupList => \@{$ArchiveReq{BackupList}}, |
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archiveloc => $ArchiveReq{archiveloc}, |
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parfile => $ArchiveReq{parfile}, |
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compression => $ArchiveReq{compression}, |
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compext => $ArchiveReq{compext}, |
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splitsize => $ArchiveReq{splitsize}, |
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sshPath => $Conf{SshPath}, |
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LOG => *LOG, |
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XferLOG => $ArchiveLOG, |
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stat => \%stat, |
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xferOK => $stat{xferOK} || 0, |
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type => "archive", |
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cmdType => $cmdType, |
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}; |
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my $cmd = $bpc->cmdVarSubstitute($Conf{$cmdType}, $vars); |
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$ArchiveLOG->write(\"Executing $cmdType: @$cmd\n"); |
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# |
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# Run the user's command, dumping the stdout/stderr into the |
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# Xfer log file. Also supply the optional $vars and %Conf in |
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# case the command is really perl code instead of a shell |
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# command. |
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# |
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$bpc->cmdSystemOrEval($cmd, |
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sub { |
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$ArchiveLOG->write(\$_[0]); |
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}, |
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$vars, \%Conf); |
| 379 |
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} |
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