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#!/usr/bin/perl -w |
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# |
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# psinib - Perl Snapshot Is Not Incremental Backup |
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# |
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# written by Dobrica Pavlinusic <dpavlin@rot13.org> 2003-01-03 |
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# released under GPL v2 or later. |
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# |
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# Backup SMB directories using file produced by LinNeighbourhood (or some |
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# other program [vi :-)] which produces file in format: |
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# |
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# smbmount service mountpoint options |
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# |
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# |
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# usage: |
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# $ backup.pl mountscript |
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|
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use strict 'vars'; |
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use Data::Dumper; |
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use Net::Ping; |
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use POSIX qw(strftime); |
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use List::Compare; |
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use Filesys::SmbClient; |
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#use Taint; |
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use Fcntl qw(LOCK_EX LOCK_NB); |
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|
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# configuration |
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my $LOG_TIME_FMT = '%Y-%m-%d %H:%M:%S'; # strftime format for logfile |
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my $DIR_TIME_FMT = '%Y%m%d'; # strftime format for backup dir |
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|
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my $LOG = '/var/log/backup.log'; # add path here... |
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$LOG = '/tmp/backup.log'; |
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|
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# store backups in which directory |
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my $BACKUP_DEST = '/data/isis_backup'; |
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|
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# files to ignore in backup |
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my @ignore = ('.md5sum', '.backupignore', 'backupignore.txt'); |
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|
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# open log |
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open(L, "> $LOG") || die "can't open log $LOG: $!"; |
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select((select(L), $|=1)[0]); # flush output |
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|
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# make a lock on logfile |
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|
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my $c = 0; |
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{ |
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flock L, LOCK_EX | LOCK_NB and last; |
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sleep 1; |
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redo if ++$c < 10; |
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# no response for 10 sec, bail out |
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print STDERR "can't take lock on $LOG -- another $0 running?\n"; |
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exit 1; |
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} |
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|
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# taint path: nmblookup should be there! |
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$ENV{'PATH'} = "/usr/bin:/bin"; |
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|
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my $mounts = shift @ARGV || |
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'mountscript'; |
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# die "usage: $0 mountscript"; |
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|
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|
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my @in_backup; # shares which are backeduped this run |
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|
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my $p = new Net::Ping->new(); |
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|
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my $backup_ok = 0; |
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|
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my $smb; |
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my %smb_atime; |
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my %smb_mtime; |
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|
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open(M, $mounts) || die "can't open $mounts: $!"; |
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while(<M>) { |
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chomp; |
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next if !/^\s*smbmount\s/; |
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my (undef,$share,undef,$opt) = split(/\s+/,$_,4); |
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|
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my ($user,$passwd,$workgroup); |
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|
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foreach (split(/,/,$opt)) { |
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my ($n,$v) = split(/=/,$_,2); |
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if ($n =~ m/username/i) { |
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if ($v =~ m#^(.+)/(.+)%(.+)$#) { |
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($user,$passwd,$workgroup) = ($1,$2,$3); |
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} elsif ($v =~ m#^(.+)/(.+)$#) { |
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($user,$workgroup) = ($1,$2); |
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} elsif ($v =~ m#^(.+)%(.+)$#) { |
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($user,$passwd) = ($1,$2); |
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} else { |
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$user = $v; |
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} |
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} elsif ($n =~ m#workgroup#i) { |
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$workgroup = $v; |
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} |
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} |
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|
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push @in_backup,$share; |
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|
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print "working on $share\n"; |
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|
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my $ip = get_ip($share); |
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|
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if ($ip) { |
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xlog($share,"IP is $ip"); |
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if ($p->ping($ip)) { |
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snap_share($share,$user,$passwd,$workgroup); |
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$backup_ok++; |
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} |
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} |
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} |
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close(M); |
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|
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xlog("","$backup_ok backups completed of total ".($#in_backup+1)." this time (".int($backup_ok*100/($#in_backup+1))." %)"); |
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|
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1; |
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|
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#------------------------------------------------------------------------- |
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|
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# get IP number from share |
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sub get_ip { |
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my $share = shift; |
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|
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my $host = $1 if ($share =~ m#//([^/]+)/#); |
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|
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my $ip = `nmblookup $host`; |
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if ($ip =~ m/(\d+\.\d+\.\d+\.\d+)\s$host/i) { |
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return $1; |
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} |
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} |
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|
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sub xlog { |
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my $share = shift; |
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my $t = strftime $LOG_TIME_FMT, localtime; |
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my $m = shift || '[no log entry]'; |
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print STDERR $m,"\n"; |
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print L "$t $share\t$m\n"; |
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} |
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|
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sub snap_share { |
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|
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my $share = shift; |
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|
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my %param = ( debug => 0 ); |
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|
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$param{username} = shift; |
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$param{password} = shift; |
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$param{workgroup} = shift; |
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|
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my ($host,$dir); |
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if ($share =~ m#//([^/]+)/(.+)$#) { |
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($host,$dir) = ($1,$2); |
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$dir =~ s/\W/_/g; |
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$dir =~ s/^_+//; |
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$dir =~ s/_+$//; |
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} else { |
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print "Can't parse share $share into host and directory!\n"; |
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return; |
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} |
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|
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my $date_dir = strftime $DIR_TIME_FMT, localtime; |
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|
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# latest backup directory |
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my $bl = "$BACKUP_DEST/$host/$dir/latest"; |
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# current backup directory |
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my $bc = "$BACKUP_DEST/$host/$dir/$date_dir"; |
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|
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my $real_bl; |
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if (-e $bl) { |
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$real_bl=readlink($bl) || die "can't read link $bl: $!"; |
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$real_bl="$BACKUP_DEST/$host/$dir/$real_bl" if (substr($real_bl,0,1) ne "/"); |
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} else { |
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print "no old backup, this is first run...\n"; |
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} |
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|
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if (-e $bc && $real_bl && $real_bl eq $bc) { |
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print "$share allready backuped...\n"; |
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return; |
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} |
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|
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die "You should really create BACKUP_DEST [$BACKUP_DEST] by hand! " if (!-e $BACKUP_DEST); |
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|
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if (! -e "$BACKUP_DEST/$host") { |
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mkdir "$BACKUP_DEST/$host" || die "can't make dir for host $host, $BACKUP_DEST/$host: $!"; |
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print "created host directory $BACKUP_DEST/$host...\n"; |
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} |
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|
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if (! -e "$BACKUP_DEST/$host/$dir") { |
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mkdir "$BACKUP_DEST/$host/$dir" || die "can't make dir for share $share, $BACKUP_DEST/$host/$dir $!"; |
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print "created dir for share $share, $BACKUP_DEST/$host/$dir...\n"; |
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} |
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|
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mkdir $bc || die "can't make dir for current backup $bc: $!"; |
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|
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my @dirs = ( "/" ); |
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my @smb_dirs = ( "/" ); |
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|
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my $transfer = 0; # bytes transfered over network |
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|
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# this will store all available files and sizes |
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my @files; |
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my %file_size; |
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my %file_atime; |
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my %file_mtime; |
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my %file_md5; |
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|
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my @smb_files; |
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my %smb_size; |
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#my %smb_atime; |
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#my %smb_mtime; |
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my %smb_md5; |
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|
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|
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sub norm_dir { |
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my $foo = shift; |
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my $prefix = shift; |
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$foo =~ s#//+#/#g; |
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$foo =~ s#/+$##g; |
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$foo =~ s#^/+##g; |
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return $prefix.$foo if ($prefix); |
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return $foo; |
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} |
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|
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# read local filesystem |
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my $di = 0; |
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while ($di <= $#dirs && $real_bl) { |
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my $d=$dirs[$di++]; |
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opendir(DIR,"$bl/$d") || warn "opendir($bl/$d): $!\n"; |
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|
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# read .backupignore if exists |
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if (-f "$bl/$d/.backupignore") { |
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open(I,"$bl/$d/.backupignore"); |
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while(<I>) { |
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chomp; |
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push @ignore,norm_dir("$d/$_"); |
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} |
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close(I); |
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print STDERR "ignore: ",join("|",@ignore),"\n"; |
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link "$bl/$d/.backupignore","$bc/$d/.backupignore" || |
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warn "can't copy $bl/$d/.backupignore to current backup dir: $!\n"; |
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} |
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|
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# read .md5sum if exists |
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if (-f "$bl/$d/.md5sum") { |
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open(I,"$bl/$d/.md5sum"); |
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while(<I>) { |
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chomp; |
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my ($md5,$f) = split(/\s+/,$_,2); |
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$file_md5{$f}=$md5; |
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} |
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close(I); |
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} |
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|
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my @clutter = readdir(DIR); |
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foreach my $f (@clutter) { |
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next if ($f eq '.'); |
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next if ($f eq '..'); |
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my $pr = norm_dir("$d/$f"); # path relative |
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my $pf = norm_dir("$d/$f","$bl/"); # path full |
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if (grep(/^\Q$pr\E$/,@ignore) == 0) { |
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if (-f $pf) { |
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push @files,$pr; |
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$file_size{$pr}=(stat($pf))[7]; |
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$file_atime{$pr}=(stat($pf))[8]; |
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$file_mtime{$pr}=(stat($pf))[9]; |
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} elsif (-d $pf) { |
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push @dirs,$pr; |
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} else { |
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print STDERR "unknown type: $pf\n"; |
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} |
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} else { |
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print STDERR "ignored: $pr\n"; |
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} |
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} |
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} |
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|
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xlog($share,($#files+1)." files and ".($#dirs+1)." dirs on local disk before backup"); |
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|
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# read smb filesystem |
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|
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xlog($share,"smb to $share as $param{username}/$param{workgroup}"); |
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|
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# FIX: how to aviod creation of ~/.smb/smb.conf ? |
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$smb = new Filesys::SmbClient(%param) || die "SmbClient :$!\n"; |
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|
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$di = 0; |
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while ($di <= $#smb_dirs) { |
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my $d=$smb_dirs[$di++]; |
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my $pf = norm_dir($d,"smb:$share/"); # path full |
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my $D = $smb->opendir($pf) || warn "smb->opendir($pf): $!\n"; |
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|
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my @clutter = $smb->readdir_struct($D); |
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foreach my $item (@clutter) { |
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my $f = $item->[1]; |
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next if ($f eq '.'); |
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next if ($f eq '..'); |
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my $pr = norm_dir("$d/$f"); # path relative |
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my $pf = norm_dir("$d/$f","smb:$share/"); # path full |
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if (grep(/^\Q$pr\E$/,@ignore) == 0) { |
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if ($item->[0] == main::SMBC_FILE) { |
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push @smb_files,$pr; |
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$smb_size{$pr}=($smb->stat($pf))[7]; |
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$smb_atime{$pr}=($smb->stat($pf))[10]; |
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$smb_mtime{$pr}=($smb->stat($pf))[11]; |
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} elsif ($item->[0] == main::SMBC_DIR) { |
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push @smb_dirs,$pr; |
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} else { |
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print STDERR "unknown type: $pf\n"; |
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} |
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} else { |
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print STDERR "smb ignored: $pr\n"; |
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} |
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} |
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} |
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|
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xlog($share,($#smb_files+1)." files and ".($#smb_dirs+1)." dirs on remote share"); |
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|
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# sync dirs |
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my $lc = List::Compare->new(\@dirs, \@smb_dirs); |
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|
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my @dirs2erase = $lc->get_Lonly; |
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my @dirs2create = $lc->get_Ronly; |
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xlog($share,($#dirs2erase+1)." dirs to erase and ".($#dirs2create+1)." dirs to create"); |
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|
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# create new dirs |
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foreach (sort @smb_dirs) { |
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mkdir "$bc/$_" || warn "mkdir $_: $!\n"; |
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} |
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|
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# sync files |
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$lc = List::Compare->new(\@files, \@smb_files); |
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|
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my @files2erase = $lc->get_Lonly; |
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my @files2create = $lc->get_Ronly; |
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xlog($share,($#files2erase+1)." files to erase and ".($#files2create+1)." files to create"); |
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|
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sub smb_copy { |
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my $smb = shift; |
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|
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my $from = shift; |
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my $to = shift; |
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|
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|
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my $l = 0; |
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|
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foreach my $f (@_) { |
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#print "smb_copy $from/$f -> $to/$f\n"; |
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if (! open(F,"> $to/$f")) { |
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print STDERR "can't open new file $to/$f: $!\n"; |
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next; |
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} |
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|
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my $fd = $smb->open("$from/$f"); |
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if (! $fd) { |
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print STDERR "can't open smb file $from/$f: $!\n"; |
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next; |
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} |
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|
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while (defined(my $b=$smb->read($fd,4096))) { |
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print F $b; |
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$l += length($b); |
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} |
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|
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$smb->close($fd); |
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close(F); |
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|
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# FIX: this fails with -T |
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my ($a,$m) = ($smb->stat("$from/$f"))[10,11]; |
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utime $a, $m, "$to/$f" || |
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warn "can't update utime on $to/$f: $!\n"; |
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|
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} |
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return $l; |
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} |
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|
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# copy new files |
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foreach (@files2create) { |
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$transfer += smb_copy($smb,"smb:$share",$bc,$_); |
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} |
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|
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my $size_sync = 0; |
| 382 |
my $atime_sync = 0; |
| 383 |
my $mtime_sync = 0; |
| 384 |
my @sync_files; |
| 385 |
my @ln_files; |
| 386 |
|
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foreach ($lc->get_intersection) { |
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|
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my $f; |
| 390 |
|
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if ($file_size{$_} != $smb_size{$_}) { |
| 392 |
$f=$_; |
| 393 |
$size_sync++; |
| 394 |
} |
| 395 |
if ($file_atime{$_} != $smb_atime{$_}) { |
| 396 |
$f=$_; |
| 397 |
$atime_sync++; |
| 398 |
} |
| 399 |
if ($file_mtime{$_} != $smb_mtime{$_}) { |
| 400 |
$f=$_; |
| 401 |
$mtime_sync++; |
| 402 |
} |
| 403 |
|
| 404 |
if ($f) { |
| 405 |
push @sync_files, $f; |
| 406 |
} else { |
| 407 |
push @ln_files, $_; |
| 408 |
} |
| 409 |
} |
| 410 |
|
| 411 |
xlog($share,($#sync_files+1)." files will be updated (diff: $size_sync size, $atime_sync atime, $mtime_sync mtime), ".($#ln_files+1)." will be linked."); |
| 412 |
|
| 413 |
foreach (@sync_files) { |
| 414 |
$transfer += smb_copy($smb,"smb:$share",$bc,$_); |
| 415 |
} |
| 416 |
|
| 417 |
xlog($share,"$transfer bytes transfered..."); |
| 418 |
|
| 419 |
foreach (@ln_files) { |
| 420 |
link "$bl/$_","$bc/$_" || warn "link $bl/$_ -> $bc/$_: $!\n"; |
| 421 |
} |
| 422 |
|
| 423 |
# remove files |
| 424 |
foreach (sort @files2erase) { |
| 425 |
unlink "$bc/$_" || warn "unlink $_: $!\n"; |
| 426 |
} |
| 427 |
|
| 428 |
# remove not needed dirs (after files) |
| 429 |
foreach (sort @dirs2erase) { |
| 430 |
rmdir "$bc/$_" || warn "rmdir $_: $!\n"; |
| 431 |
} |
| 432 |
|
| 433 |
|
| 434 |
# FIX: create .md5sum |
| 435 |
|
| 436 |
# create leatest link |
| 437 |
symlink $bc,$bl || warn "can't create latest symlink $bl -> $bc: $!\n"; |
| 438 |
|
| 439 |
xlog($share,"backup completed..."); |
| 440 |
} |
| 441 |
|
| 442 |
#------------------------------------------------------------------------- |
| 443 |
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