2 #============================================================= -*-perl-*-
4 # BackupPC_restore: Restore files to a client.
8 # Usage: BackupPC_restore <hostIP> <client> <reqFileName>
11 # Craig Barratt <cbarratt@users.sourceforge.net>
14 # Copyright (C) 2001-2003 Craig Barratt
16 # This program is free software; you can redistribute it and/or modify
17 # it under the terms of the GNU General Public License as published by
18 # the Free Software Foundation; either version 2 of the License, or
19 # (at your option) any later version.
21 # This program is distributed in the hope that it will be useful,
22 # but WITHOUT ANY WARRANTY; without even the implied warranty of
23 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 # GNU General Public License for more details.
26 # You should have received a copy of the GNU General Public License
27 # along with this program; if not, write to the Free Software
28 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #========================================================================
32 # Version 2.1.3, released 21 Jan 2007.
34 # See http://backuppc.sourceforge.net.
36 #========================================================================
40 use lib "/usr/local/BackupPC2.1.0/lib";
42 use BackupPC::FileZIO;
43 use BackupPC::Xfer::Smb;
44 use BackupPC::Xfer::Tar;
45 use BackupPC::Xfer::Rsync;
51 use vars qw( %RestoreReq );
53 ###########################################################################
55 ###########################################################################
57 die("BackupPC::Lib->new failed\n") if ( !(my $bpc = BackupPC::Lib->new) );
58 my $TopDir = $bpc->TopDir();
59 my $BinDir = $bpc->BinDir();
60 my %Conf = $bpc->Conf();
63 my($hostIP, $host, $client, $reqFileName, %stat);
68 print("usage: $0 <hostIP> <client> <reqFileName>\n");
71 $hostIP = $1 if ( $ARGV[0] =~ /(.+)/ );
72 $client = $1 if ( $ARGV[1] =~ /(.+)/ );
73 if ( $ARGV[2] !~ /^([\w.]+)$/ ) {
74 print("$0: bad reqFileName (arg #3): $ARGV[2]\n");
79 my $startTime = time();
81 my $Hosts = $bpc->HostInfoRead($client);
83 my $Dir = "$TopDir/pc/$client";
88 # Catch various signals
90 $SIG{INT} = \&catch_signal;
91 $SIG{ALRM} = \&catch_signal;
92 $SIG{TERM} = \&catch_signal;
93 $SIG{PIPE} = \&catch_signal;
94 $SIG{STOP} = \&catch_signal;
95 $SIG{TSTP} = \&catch_signal;
96 $SIG{TTIN} = \&catch_signal;
99 mkpath($Dir, 0, 0777) if ( !-d $Dir );
100 if ( !-f "$Dir/LOCK" ) {
101 open(LOCK, ">", "$Dir/LOCK") && close(LOCK);
103 open(LOG, ">>", "$Dir/LOG");
104 select(LOG); $| = 1; select(STDOUT);
108 # Read the request file
110 if ( !(my $ret = do "$Dir/$reqFileName") ) {
113 $err = "couldn't parse $Dir/$reqFileName: $@";
114 } elsif ( !defined($ret) ) {
115 $err = "couldn't do $Dir/$reqFileName: $!";
117 $err = "couldn't run $Dir/$reqFileName";
119 $stat{hostError} = $err;
120 exit(RestoreCleanup($client));
124 # Re-read config file, so we can include the PC-specific config
126 if ( defined(my $error = $bpc->ConfigRead($client)) ) {
127 $stat{hostError} = "Can't read PC's config file: $error";
128 exit(RestoreCleanup($client));
130 %Conf = $bpc->Conf();
133 # Make sure we eventually timeout if there is no activity from
134 # the data transport program.
136 alarm($Conf{ClientTimeout});
139 # See if the host name is aliased
141 if ( $Conf{ClientNameAlias} ne "" ) {
142 $host = $Conf{ClientNameAlias};
148 # Find its IP address
150 if ( $hostIP !~ /\d+\.\d+\.\d+\.\d+/ ) {
151 if ( !defined(gethostbyname($host)) ) {
153 # Ok, NS doesn't know about it. Maybe it is a NetBios name
156 if ( !defined($hostIP = $bpc->NetBiosHostIPFind($host)) ) {
157 $stat{hostError} = "Can't find host $host";
158 exit(RestoreCleanup($client));
166 # Check if $host is alive
168 my $delay = $bpc->CheckHostAlive($hostIP);
170 $stat{hostError} = "no ping response from $host ($hostIP)";
171 exit(RestoreCleanup($client));
172 } elsif ( $delay > $Conf{PingMaxMsec} ) {
173 $stat{hostError} = sprintf("ping too slow: %.4gmsec (max is %gmsec)\n",
174 $delay, $Conf{PingMaxMsec});
175 exit(RestoreCleanup($client));
179 # Make sure it is really the machine we expect
181 if ( (my $errMsg = CorrectHostCheck($hostIP, $host)) ) {
182 $stat{hostError} = $errMsg;
183 exit(RestoreCleanup($client));
187 # Setup file extension for compression and open RestoreLOG output file
189 if ( $Conf{CompressLevel} && !BackupPC::FileZIO->compOk ) {
190 $stat{hostError} = "Compress:Zlib not found";
191 exit(RestoreCleanup($client));
193 my $fileExt = $Conf{CompressLevel} > 0 ? ".z" : "";
194 my $RestoreLOG = BackupPC::FileZIO->open("$Dir/RestoreLOG$fileExt", 1,
195 $Conf{CompressLevel});
196 my $tarCreateFileCnt = 0;
197 my $tarCreateByteCnt = 0;
198 my $tarCreateErrCnt = 1; # assume not ok until we learn otherwise
202 $stat{xferOK} = $stat{hostAbort} = undef;
203 $stat{hostError} = $stat{lastOutputLine} = undef;
207 # Run an optional pre-restore command
209 UserCommandRun("RestorePreUserCmd");
212 if ( $Conf{XferMethod} eq "tar" ) {
214 # Use tar (eg: tar/ssh) as the transport program.
216 $xfer = BackupPC::Xfer::Tar->new($bpc);
217 } elsif ( $Conf{XferMethod} eq "rsync" || $Conf{XferMethod} eq "rsyncd" ) {
219 # Use rsync as the transport program.
221 if ( !defined($xfer = BackupPC::Xfer::Rsync->new($bpc)) ) {
222 my $errStr = BackupPC::Xfer::Rsync->errStr;
223 UserCommandRun("RestorePostUserCmd") if ( $NeedPostCmd );
224 $stat{hostError} = $errStr;
225 exit(RestoreCleanup($client));
229 # Default is to use smbclient (smb) as the transport program.
231 $xfer = BackupPC::Xfer::Smb->new($bpc);
233 my $useTar = $xfer->useTar;
237 # Create a socketpair to connect BackupPC_tarCreate to the transport
238 # program (smbclient, tar, etc).
239 # WH is the write handle for writing, provided to BackupPC_tarCreate
240 # and RH is the other end of the pipe for reading provided to the
243 if ( socketpair(RH, WH, AF_UNIX, SOCK_STREAM, PF_UNSPEC) ) {
244 shutdown(RH, 1); # no writing to this socket
245 shutdown(WH, 0); # no reading from this socket
246 setsockopt(RH, SOL_SOCKET, SO_RCVBUF, 8 * 65536);
247 setsockopt(WH, SOL_SOCKET, SO_SNDBUF, 8 * 65536);
250 # Default to pipe() if socketpair() doesn't work.
257 # Run the transport program, which reads from RH and extracts the data.
259 my @Backups = $bpc->BackupInfoRead($RestoreReq{hostSrc});
265 shareName => $RestoreReq{shareDest},
268 XferLOG => $RestoreLOG,
269 XferMethod => $Conf{XferMethod},
270 logLevel => $Conf{XferLogLevel},
271 bkupSrcHost => $RestoreReq{hostSrc},
272 bkupSrcShare => $RestoreReq{shareSrc},
273 bkupSrcNum => $RestoreReq{num},
274 backups => \@Backups,
275 pathHdrSrc => $RestoreReq{pathHdrSrc},
276 pathHdrDest => $RestoreReq{pathHdrDest},
277 fileList => $RestoreReq{fileList},
278 pidHandler => \&pidHandler,
281 $xfer->args($xferArgs);
283 if ( !defined($logMsg = $xfer->start()) ) {
284 UserCommandRun("RestorePostUserCmd") if ( $NeedPostCmd );
285 $stat{hostError} = "xfer start failed: ", $xfer->errStr;
286 exit(RestoreCleanup($client));
291 # Now do the restore by running BackupPC_tarCreate
293 # The parent must close the read handle since the transport program
299 # fork a child for BackupPC_tarCreate. TAR is a file handle
300 # on which we (the parent) read the stderr from BackupPC_tarCreate.
303 if ( defined($RestoreReq{pathHdrDest})
304 && $RestoreReq{pathHdrDest} ne $RestoreReq{pathHdrSrc} ) {
305 @tarPathOpts = ("-r", $RestoreReq{pathHdrSrc},
306 "-p", $RestoreReq{pathHdrDest}
310 "-h", $RestoreReq{hostSrc},
311 "-n", $RestoreReq{num},
312 "-s", $RestoreReq{shareSrc},
315 @{$RestoreReq{fileList}},
317 my $logMsg = "Running: "
318 . $bpc->execCmd2ShellCmd("$BinDir/BackupPC_tarCreate", @tarArgs)
320 $RestoreLOG->write(\$logMsg);
321 if ( !defined($tarPid = open(TAR, "-|")) ) {
323 # FIX: need to cleanup xfer
324 UserCommandRun("RestorePostUserCmd") if ( $NeedPostCmd );
325 $stat{hostError} = "Can't fork to run tar";
326 exit(RestoreCleanup($client));
331 # This is the tarCreate child. Clone STDERR to STDOUT,
332 # STDOUT to WH, and then exec BackupPC_tarCreate.
336 open(STDERR, ">&STDOUT");
338 open(STDOUT, ">&WH");
340 exec("$BinDir/BackupPC_tarCreate", @tarArgs);
341 print(LOG $bpc->timeStamp, "can't exec $BinDir/BackupPC_tarCreate\n");
342 # FIX: need to cleanup xfer
346 # The parent must close the write handle since BackupPC_tarCreate
351 @xferPid = $xfer->xferPid;
353 print(LOG $bpc->timeStamp, $logMsg, "\n");
354 print("started_restore\n");
356 pidHandler(@xferPid);
359 # Parse the output of the transfer program and BackupPC_tarCreate
360 # while they run. Since we are reading from two or more children
363 my($FDread, $tarOut, $mesg);
364 vec($FDread, fileno(TAR), 1) = 1;
365 $xfer->setSelectMask(\$FDread);
369 last if ( $FDread =~ /^\0*$/ );
370 alarm($Conf{ClientTimeout});
371 select(my $rout = $FDread, undef, $ein, undef);
372 if ( vec($rout, fileno(TAR), 1) ) {
373 if ( sysread(TAR, $mesg, 8192) <= 0 ) {
374 vec($FDread, fileno(TAR), 1) = 0;
376 $tarCreateErrCnt = 1;
377 $tarCreateErr = "BackupPC_tarCreate failed";
383 while ( $tarOut =~ /(.*?)[\n\r]+(.*)/s ) {
386 $RestoreLOG->write(\"tarCreate: $_\n");
387 if ( /^Done: (\d+) files, (\d+) bytes, (\d+) dirs, (\d+) specials, (\d+) errors/ ) {
388 $tarCreateFileCnt = $1;
389 $tarCreateByteCnt = $2;
390 $tarCreateErrCnt = $5;
393 last if ( !$xfer->readOutput(\$FDread, $rout) );
394 while ( my $str = $xfer->logMsgGet ) {
395 print(LOG $bpc->timeStamp, "xfer: $str\n");
397 if ( $xfer->getStats->{fileCnt} == 1 ) {
399 # Make sure it is still the machine we expect. We do this while
400 # the transfer is running to avoid a potential race condition if
401 # the ip address was reassigned by dhcp just before we started
404 if ( my $errMsg = CorrectHostCheck($hostIP, $host) ) {
405 $stat{hostError} = $errMsg;
412 # otherwise the xfer module does everything for us
414 print(LOG $bpc->timeStamp, "Starting restore\n");
415 print("started_restore\n");
416 ($tarCreateFileCnt, $tarCreateByteCnt,
417 $tarCreateErrCnt, $tarCreateErr) = $xfer->run();
422 # Merge the xfer status (need to accumulate counts)
424 my $newStat = $xfer->getStats;
425 foreach my $k ( (keys(%stat), keys(%$newStat)) ) {
426 next if ( !defined($newStat->{$k}) );
427 if ( $k =~ /Cnt$/ ) {
428 $stat{$k} += $newStat->{$k};
429 delete($newStat->{$k});
432 if ( !defined($stat{$k}) ) {
433 $stat{$k} = $newStat->{$k};
434 delete($newStat->{$k});
439 exit(RestoreCleanup($client));
441 ###########################################################################
443 ###########################################################################
447 my($hostIP, $host) = @_;
448 return if ( $hostIP eq $host && !$Conf{FixedIPNetBiosNameCheck}
449 || $Conf{NmbLookupCmd} eq "" );
450 my($netBiosHost, $netBiosUser) = $bpc->NetBiosInfoGet($hostIP);
451 return "host $host has mismatching netbios name $netBiosHost"
452 if ( $netBiosHost ne $host );
461 # Children quit quietly on ALRM
463 exit(1) if ( $Pid != $$ && $signame eq "ALRM" );
466 # Ignore signals in children
468 return if ( $Pid != $$ );
471 # Note: needs to be tested for each kind of XferMethod
473 print(LOG $bpc->timeStamp, "cleaning up after signal $signame\n");
474 $SIG{$signame} = 'IGNORE';
475 $RestoreLOG->write(\"exiting after signal $signame\n");
477 if ( $signame eq "INT" ) {
478 $stat{hostError} = "aborted by user (signal=$signame)";
480 $stat{hostError} = "aborted by signal=$signame";
482 exit(RestoreCleanup($client));
486 # Cleanup and update the restore status
492 $stat{xferOK} = 0 if ( $stat{hostError} || $stat{hostAbort}
495 if ( !$stat{xferOK} ) {
497 # kill off the tranfer program, first nicely then forcefully
500 kill($bpc->sigName2num("INT"), @xferPid);
502 kill($bpc->sigName2num("KILL"), @xferPid);
505 # kill off the tar process, first nicely then forcefully
508 kill($bpc->sigName2num("INT"), $tarPid);
510 kill($bpc->sigName2num("KILL"), $tarPid);
518 # Do one last check to make sure it is still the machine we expect.
520 if ( $stat{xferOK} && (my $errMsg = CorrectHostCheck($hostIP, $host)) ) {
521 $stat{hostError} = $errMsg;
524 @Restores = $bpc->RestoreInfoRead($client);
525 for ( my $i = 0 ; $i < @Restores ; $i++ ) {
526 $lastNum = $Restores[$i]{num} if ( $lastNum < $Restores[$i]{num} );
531 # Run an optional post-restore command
533 UserCommandRun("RestorePostUserCmd") if ( $NeedPostCmd );
535 rename("$Dir/RestoreLOG$fileExt", "$Dir/RestoreLOG.$lastNum$fileExt");
536 rename("$Dir/$reqFileName", "$Dir/RestoreInfo.$lastNum");
537 my $endTime = time();
540 # If the restore failed, clean up
542 if ( !$stat{xferOK} ) {
544 # wait a short while and see if the system is still alive
546 $stat{hostError} ||= $tarCreateErr if ( $tarCreateErr ne "" );
547 $stat{hostError} = $stat{lastOutputLine} if ( $stat{hostError} eq "" );
549 if ( $bpc->CheckHostAlive($hostIP) < 0 ) {
550 $stat{hostAbort} = 1;
552 if ( $stat{hostAbort} && $stat{hostError} eq "" ) {
553 $stat{hostError} = "lost network connection during restore";
555 $RestoreLOG->write(\"Restore failed: $stat{hostError}\n")
556 if ( defined($RestoreLOG) );
559 $RestoreLOG->close() if ( defined($RestoreLOG) );
562 # Add the new restore information to the restore file
564 @Restores = $bpc->RestoreInfoRead($client);
566 $Restores[$i]{num} = $lastNum;
567 $Restores[$i]{startTime} = $startTime;
568 $Restores[$i]{endTime} = $endTime;
569 $Restores[$i]{result} = $stat{xferOK} ? "ok" : "failed";
570 $Restores[$i]{errorMsg} = $stat{hostError};
571 $Restores[$i]{nFiles} = $tarCreateFileCnt;
572 $Restores[$i]{size} = $tarCreateByteCnt;
573 $Restores[$i]{tarCreateErrs} = $tarCreateErrCnt;
574 $Restores[$i]{xferErrs} = $stat{xferErrCnt} || 0;
576 while ( @Restores > $Conf{RestoreInfoKeepCnt} ) {
577 my $num = $Restores[0]{num};
578 unlink("$Dir/RestoreLOG.$num.z");
579 unlink("$Dir/RestoreLOG.$num");
580 unlink("$Dir/RestoreInfo.$num");
583 $bpc->RestoreInfoWrite($client, @Restores);
585 if ( !$stat{xferOK} ) {
586 print(LOG $bpc->timeStamp, "Restore failed ($stat{hostError})\n");
587 print("restore failed: $stat{hostError}\n");
590 print("restore complete\n");
596 # The Xfer method might tell us from time to time about processes
597 # it forks. We tell BackupPC about this (for status displays) and
598 # keep track of the pids in case we cancel the backup
603 @xferPid = grep(/./, @xferPid);
604 return if ( !@xferPid && $tarPid < 0 );
606 push(@pids, $tarPid) if ( $tarPid > 0 );
607 my $str = join(",", @pids);
608 $RestoreLOG->write(\"Xfer PIDs are now $str\n") if ( defined($RestoreLOG) );
609 print("xferPids $str\n");
613 # Run an optional pre- or post-dump command
619 return if ( !defined($Conf{$cmdType}) );
625 share => $RestoreReq{shareDest},
626 XferMethod => $Conf{XferMethod},
627 sshPath => $Conf{SshPath},
629 user => $Hosts->{$client}{user},
630 moreUsers => $Hosts->{$client}{moreUsers},
631 XferLOG => $RestoreLOG,
633 xferOK => $stat{xferOK} || 0,
634 hostError => $stat{hostError},
636 bkupSrcHost => $RestoreReq{hostSrc},
637 bkupSrcShare => $RestoreReq{shareSrc},
638 bkupSrcNum => $RestoreReq{num},
639 backups => \@Backups,
640 pathHdrSrc => $RestoreReq{pathHdrSrc},
641 pathHdrDest => $RestoreReq{pathHdrDest},
642 fileList => $RestoreReq{fileList},
645 my $cmd = $bpc->cmdVarSubstitute($Conf{$cmdType}, $vars);
646 $RestoreLOG->write(\"Executing $cmdType: @$cmd\n");
648 # Run the user's command, dumping the stdout/stderr into the
649 # Xfer log file. Also supply the optional $vars and %Conf in
650 # case the command is really perl code instead of a shell
653 $bpc->cmdSystemOrEval($cmd,
655 $RestoreLOG->write(\$_[0]);