X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=chiark-utils.git;a=blobdiff_plain;f=backup%2Ffull;h=61b62668ef47ba249ad1924690a6674c68786328;hp=388270fa62263687ba670caff4c671fb81374426;hb=2401434ef9f2a0bff941d7c0a6299b831c471dd2;hpb=b0462536b814ddf1e337379dac850e745f4635dc diff --git a/backup/full b/backup/full index 388270f..61b6266 100755 --- a/backup/full +++ b/backup/full @@ -6,12 +6,13 @@ # other UN*X-compatible machines, as used on chiark.greenend.org.uk. # # chiark backup is: -# Copyright (C) 1997-1998,2000-2001 Ian Jackson +# Copyright (C) 1997-1998,2000-2001,2007 +# Ian Jackson # Copyright (C) 1999 Peter Maydell # # This is free software; you can redistribute it and/or modify it under the # terms of the GNU General Public License as published by the Free Software -# Foundation; either version 2, or (at your option) any later version. +# Foundation; either version 3, or (at your option) any later version. # # This is distributed in the hope that it will be useful, but WITHOUT ANY # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS @@ -19,8 +20,8 @@ # details. # # You should have received a copy of the GNU General Public License along -# with this program; if not, write to the Free Software Foundation, Inc., -# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +# with this program; if not, consult the Free Software Foundation's +# website at www.fsf.org, or the GNU Project website at www.gnu.org. BEGIN { $etc= '/etc/chiark-backup'; @@ -30,12 +31,31 @@ BEGIN { $|=1; +while (@ARGV) { + $_= shift @ARGV; + if (m/^\-\-no\-reten$/) { + $noreten=1; + } elsif (m/^\-\-no\-config\-check$/) { + $nocheck=1; + } else { + die "unknown option/argument \`$_'\n"; + } +} + # Check to see whether the tape.nn and fsys.nn files are sane. # checkallused checks that all the filesystems mounted are in fact # dumped in both full and incremental dumps. -setstatus "FAILED configuration check"; -print "Configuration check ...\n" or die $!; -system 'backup-checkallused'; $? and die $?; + +openlog(); + +if (!$nocheck) { + setstatus "FAILED configuration check"; + print "Configuration check ...\n" or die $!; + system 'backup-checkallused'; $? and die $?; +} else { + setstatus "FAILED rewinding"; + rewind_raw(); +} printdate(); @@ -123,13 +143,14 @@ if ($incremental) { # Read the filesystem group definition (file fsys.nnn) readfsys("$fsys"); -openlog(); $doing= "dump of $fsys to tape $tapedesc in drive $tape"; print LOG "$doing:\n" or die $!; -setstatus "FAILED retensioning"; -system "mt -f $tape reten"; $? and die $?; +if (!$noreten) { + setstatus "FAILED retensioning"; + runsystem("mt -f $tape reten"); +} setstatus "FAILED writing tape ID"; # First write the tape ID to this tape. @@ -141,13 +162,15 @@ unlink 'this-md5sums'; print "Doing $doing ...\n" or die $!; unlink 'p'; -system 'mknod p p'; $? and die $?; +system 'mknod -m600 p p'; $? and die $?; setstatus "FAILED during dump"; sub closepipes () { close(DUMPOR); close(TEEOR); close(BUFOR); close(FINDOR); close(DUMPOW); close(TEEOW); close(BUFOW); close(FINDOW); + close(GZOR); close(GZOW); + close(DDERRR); close(DDERRW); } # work out a find option string that will exclude the required files @@ -163,16 +186,32 @@ foreach $exc (@excl) { # For each filesystem to be put on this tape: for $tf (@fsys) { printdate(); + parsefsys(); + prepfsys(); + pipe(FINDOR,FINDOW) or die $!; pipe(DUMPOR,DUMPOW) or die $!; pipe(TEEOR,TEEOW) or die $!; + pipe(TEEOR,TEEOW) or die $!; pipe(BUFOR,BUFOW) or die $!; - parsefsys(); + pipe(DDERRR,DDERRW) or die $!; + + $bufir='TEEOR'; + $ddcmd= "dd ibs=$softblocksizebytes obs=$blocksizebytes of=$ntape 2>&1"; + + if ($gz) { + $bufir='GZOR'; + pipe(GZOR,GZOW) or die $!; + $ddcmd .= " conv=sync"; + } + nexttapefile("full $prefix:$atf_print"); + # We can back up via dump or cpio or zafio + $dumpin= '&FINDOW',$rstr."find $atf -xdev -noleaf -print0"; $dumpcmd= "cpio -Hustar -o0C$softblocksizebytes"; @@ -183,22 +222,45 @@ for $tf (@fsys) { # don't use verbose flag as this generates 2MB report emails :-> $dumpcmd = "afio -b $softblocksizebytes -Zo -"; $dumpin = '<&FINDOR'; + } elsif ($tm eq 'ntfsimage') { + $dumpcmd= "ntfsimage -svvf --dirty $dev"; + } elsif ($tm eq 'gtar') { + execute("$rstr touch $fsidfile+new"); + $dumpcmd= "tar Ccfl $atf - ."; } else { - die "unknown method $tm for $prefix:$atf\n"; + die "unknown method $tm for $prefix:$atf_print\n"; } # This is a funky way of doing a pipeline which pays attention # to the exit status of all the commands in the pipeline. # It is roughly equivalent to: # md5sum

>this-md5sums - # dump <$dumpin | tee p | writebuffer | dd >/dev/null - startprocess '>this-md5sums','md5sum'; - startprocess $dumpin,'>&DUMPOW',$rstr.$dumpcmd; - startprocess '<&DUMPOR','>&TEEOW','tee p'; - startprocess '<&TEEOR','>&BUFOW','writebuffer'; - startprocess '<&BUFOR','>/dev/null' - ,"dd ibs=$softblocksizebytes obs=$blocksizebytes of=$ntape"; + # dump <$dumpin | tee p [| gzip] | writebuffer | dd >/dev/null + + startprocess '>this-md5sums',"$nice md5sum"; + startprocess $dumpin,'>&DUMPOW',"$nice ".$rstr.$dumpcmd; + startprocess '<&DUMPOR','>&TEEOW',"$nice tee p"; + if ($gz) { + startprocess '<&TEEOR','>&GZOW',"$nice gzip -v$gz"; + } + startprocess "<&$bufir",'>&BUFOW',"$nasty writebuffer"; + startprocess '<&DDERRR','>/dev/null',"$nice tee dderr >&2"; + startprocess '<&BUFOR','>&DDERRW',"$nasty $ddcmd"; closepipes(); endprocesses(); + + open DDERR, "dderr" or die $!; + defined(read DDERR,$_,1023) or die $!; + close DDERR; + m/\n(\d+)\+0 records out\n/ or die ">$dderr< ?"; + push @tapefilesizes, [ $1, $currenttapefilename ]; + $totalrecords += $1; + pboth("total blocks written so far: $totalrecords\n"); + + if ($tm eq 'gtar') { + execute("$rstr mv -f $fsidfile+new $fsidfile"); + } + + finfsys(); } # The backup should now be complete; verify it @@ -206,26 +268,48 @@ for $tf (@fsys) { setstatus "FAILED during check"; # Rewind the tape and skip the TAPEID record -system "mt -f $tape rewind"; $? and die $?; -system "mt -f $ntape fsf 1"; $? and die $?; +runsystem("mt -f $tape rewind"); +runsystem("mt -f $ntape fsf 1"); # Check the md5sums match for each filesystem on the tape open S,"this-md5sums" or die $!; for $tf (@fsys) { printdate(); + parsefsys(); chomp($orgsum= ); $orgsum =~ s/\ +\-?$//; $orgsum =~ m/^[0-9a-fA-F]{32}$/i or die "orgsum \`$orgsum' ?"; - chomp($csum= `dd if=$ntape ibs=$blocksizebytes | readbuffer | md5sum`); + $cmd= "$nasty dd if=$ntape ibs=$blocksizebytes"; + $cmd .= " | $nasty readbuffer"; + $cmd .= " | $nice gzip -vd" if $gz; + $cmd .= " | $nice md5sum"; + pboth(" $cmd\n"); + chomp($csum= `$cmd`); $csum =~ s/\ +\-?$//; $orgsum eq $csum or die "MISMATCH $tf $csum $orgsum\n"; print "checksum ok $csum\t$tf\n" or die $!; print LOG "checksum ok $csum\t$tf\n" or die $!; } printdate(); -system "mt -f $tape rewind"; $? and die $?; +runsystem("mt -f $tape rewind"); setstatus "FAILED during cleanup"; +$summary= ''; +foreach $tfs (@tapefilesizes) { + $summary .= sprintf " %10d blocks for %s\n", $tfs->[0], $tfs->[1] +} +$summary .= + sprintf " %10d blocks total (of %d bytes) plus TAPEID and headers\n", + $totalrecords, $blocksizebytes; + +pboth("size-summary:\n"); +pboth($summary); + +open SS, ">size-summary..new" or die $!; +print SS $summary or die $!; +close SS or die $!; +rename 'size-summary..new',"size-summary.$fsys" or die $!; + # Write to some status files to indicate what the backup system # ought to do when next invoked. # reset incremental backup count to 1.