| 1 |
dpavlin |
1.1 |
#!/usr/bin/perl -w |
| 2 |
|
|
# |
| 3 |
|
|
# psinib - Perl Snapshot Is Not Incremental Backup |
| 4 |
|
|
# |
| 5 |
|
|
# written by Dobrica Pavlinusic <dpavlin@rot13.org> 2003-01-03 |
| 6 |
|
|
# released under GPL v2 or later. |
| 7 |
|
|
# |
| 8 |
|
|
# Backup SMB directories using file produced by LinNeighbourhood (or some |
| 9 |
|
|
# other program [vi :-)] which produces file in format: |
| 10 |
|
|
# |
| 11 |
|
|
# smbmount service mountpoint options |
| 12 |
|
|
# |
| 13 |
|
|
# |
| 14 |
|
|
# usage: |
| 15 |
|
|
# $ backup.pl mountscript |
| 16 |
|
|
|
| 17 |
|
|
use strict 'vars'; |
| 18 |
|
|
use Data::Dumper; |
| 19 |
|
|
use Net::Ping; |
| 20 |
|
|
use POSIX qw(strftime); |
| 21 |
|
|
use List::Compare; |
| 22 |
|
|
use Filesys::SmbClient; |
| 23 |
|
|
#use Taint; |
| 24 |
dpavlin |
1.2 |
use Fcntl qw(LOCK_EX LOCK_NB); |
| 25 |
dpavlin |
1.1 |
|
| 26 |
|
|
# configuration |
| 27 |
|
|
my $LOG_TIME_FMT = '%Y-%m-%d %H:%M:%S'; # strftime format for logfile |
| 28 |
|
|
my $DIR_TIME_FMT = '%Y%m%d'; # strftime format for backup dir |
| 29 |
|
|
|
| 30 |
|
|
my $LOG = '/var/log/backup.log'; # add path here... |
| 31 |
|
|
$LOG = '/tmp/backup.log'; |
| 32 |
|
|
|
| 33 |
|
|
# store backups in which directory |
| 34 |
|
|
my $BACKUP_DEST = '/data/isis_backup'; |
| 35 |
|
|
|
| 36 |
|
|
# files to ignore in backup |
| 37 |
|
|
my @ignore = ('.md5sum', '.backupignore', 'backupignore.txt'); |
| 38 |
|
|
|
| 39 |
|
|
# open log |
| 40 |
|
|
open(L, "> $LOG") || die "can't open log $LOG: $!"; |
| 41 |
|
|
select((select(L), $|=1)[0]); # flush output |
| 42 |
dpavlin |
1.2 |
|
| 43 |
|
|
# make a lock on logfile |
| 44 |
|
|
|
| 45 |
|
|
my $c = 0; |
| 46 |
|
|
{ |
| 47 |
|
|
flock L, LOCK_EX | LOCK_NB and last; |
| 48 |
|
|
sleep 1; |
| 49 |
|
|
redo if ++$c < 10; |
| 50 |
|
|
# no response for 10 sec, bail out |
| 51 |
|
|
print STDERR "can't take lock on $LOG -- another $0 running?\n"; |
| 52 |
|
|
exit 1; |
| 53 |
|
|
} |
| 54 |
dpavlin |
1.1 |
|
| 55 |
|
|
# taint path: nmblookup should be there! |
| 56 |
|
|
$ENV{'PATH'} = "/usr/bin:/bin"; |
| 57 |
|
|
|
| 58 |
|
|
my $mounts = shift @ARGV || |
| 59 |
|
|
'mountscript'; |
| 60 |
|
|
# die "usage: $0 mountscript"; |
| 61 |
|
|
|
| 62 |
|
|
|
| 63 |
|
|
my @in_backup; # shares which are backeduped this run |
| 64 |
|
|
|
| 65 |
|
|
my $p = new Net::Ping->new(); |
| 66 |
|
|
|
| 67 |
|
|
my $backup_ok = 0; |
| 68 |
|
|
|
| 69 |
|
|
my $smb; |
| 70 |
|
|
my %smb_atime; |
| 71 |
|
|
my %smb_mtime; |
| 72 |
|
|
|
| 73 |
|
|
open(M, $mounts) || die "can't open $mounts: $!"; |
| 74 |
|
|
while(<M>) { |
| 75 |
|
|
chomp; |
| 76 |
|
|
next if !/^\s*smbmount\s/; |
| 77 |
|
|
my (undef,$share,undef,$opt) = split(/\s+/,$_,4); |
| 78 |
|
|
|
| 79 |
|
|
my ($user,$passwd,$workgroup); |
| 80 |
|
|
|
| 81 |
|
|
foreach (split(/,/,$opt)) { |
| 82 |
|
|
my ($n,$v) = split(/=/,$_,2); |
| 83 |
|
|
if ($n =~ m/username/i) { |
| 84 |
|
|
if ($v =~ m#^(.+)/(.+)%(.+)$#) { |
| 85 |
|
|
($user,$passwd,$workgroup) = ($1,$2,$3); |
| 86 |
|
|
} elsif ($v =~ m#^(.+)/(.+)$#) { |
| 87 |
|
|
($user,$workgroup) = ($1,$2); |
| 88 |
|
|
} elsif ($v =~ m#^(.+)%(.+)$#) { |
| 89 |
|
|
($user,$passwd) = ($1,$2); |
| 90 |
|
|
} else { |
| 91 |
|
|
$user = $v; |
| 92 |
|
|
} |
| 93 |
|
|
} elsif ($n =~ m#workgroup#i) { |
| 94 |
|
|
$workgroup = $v; |
| 95 |
|
|
} |
| 96 |
|
|
} |
| 97 |
|
|
|
| 98 |
|
|
push @in_backup,$share; |
| 99 |
|
|
|
| 100 |
|
|
print "working on $share\n"; |
| 101 |
|
|
|
| 102 |
|
|
my $ip = get_ip($share); |
| 103 |
|
|
|
| 104 |
|
|
if ($ip) { |
| 105 |
|
|
xlog($share,"IP is $ip"); |
| 106 |
|
|
if ($p->ping($ip)) { |
| 107 |
|
|
snap_share($share,$user,$passwd,$workgroup); |
| 108 |
|
|
$backup_ok++; |
| 109 |
|
|
} |
| 110 |
|
|
} |
| 111 |
|
|
} |
| 112 |
|
|
close(M); |
| 113 |
|
|
|
| 114 |
|
|
xlog("","$backup_ok backups completed of total ".($#in_backup+1)." this time (".int($backup_ok*100/($#in_backup+1))." %)"); |
| 115 |
|
|
|
| 116 |
|
|
1; |
| 117 |
|
|
|
| 118 |
|
|
#------------------------------------------------------------------------- |
| 119 |
|
|
|
| 120 |
|
|
# get IP number from share |
| 121 |
|
|
sub get_ip { |
| 122 |
|
|
my $share = shift; |
| 123 |
|
|
|
| 124 |
|
|
my $host = $1 if ($share =~ m#//([^/]+)/#); |
| 125 |
|
|
|
| 126 |
|
|
my $ip = `nmblookup $host`; |
| 127 |
|
|
if ($ip =~ m/(\d+\.\d+\.\d+\.\d+)\s$host/i) { |
| 128 |
|
|
return $1; |
| 129 |
|
|
} |
| 130 |
|
|
} |
| 131 |
|
|
|
| 132 |
|
|
sub xlog { |
| 133 |
|
|
my $share = shift; |
| 134 |
|
|
my $t = strftime $LOG_TIME_FMT, localtime; |
| 135 |
|
|
my $m = shift || '[no log entry]'; |
| 136 |
|
|
print STDERR $m,"\n"; |
| 137 |
|
|
print L "$t $share\t$m\n"; |
| 138 |
|
|
} |
| 139 |
|
|
|
| 140 |
|
|
sub snap_share { |
| 141 |
|
|
|
| 142 |
|
|
my $share = shift; |
| 143 |
|
|
|
| 144 |
|
|
my %param = ( debug => 0 ); |
| 145 |
|
|
|
| 146 |
|
|
$param{username} = shift; |
| 147 |
|
|
$param{password} = shift; |
| 148 |
|
|
$param{workgroup} = shift; |
| 149 |
|
|
|
| 150 |
|
|
my ($host,$dir); |
| 151 |
|
|
if ($share =~ m#//([^/]+)/(.+)$#) { |
| 152 |
|
|
($host,$dir) = ($1,$2); |
| 153 |
|
|
$dir =~ s/\W/_/g; |
| 154 |
|
|
$dir =~ s/^_+//; |
| 155 |
|
|
$dir =~ s/_+$//; |
| 156 |
|
|
} else { |
| 157 |
|
|
print "Can't parse share $share into host and directory!\n"; |
| 158 |
|
|
return; |
| 159 |
|
|
} |
| 160 |
|
|
|
| 161 |
|
|
my $date_dir = strftime $DIR_TIME_FMT, localtime; |
| 162 |
|
|
|
| 163 |
|
|
# latest backup directory |
| 164 |
|
|
my $bl = "$BACKUP_DEST/$host/$dir/latest"; |
| 165 |
|
|
# current backup directory |
| 166 |
|
|
my $bc = "$BACKUP_DEST/$host/$dir/$date_dir"; |
| 167 |
|
|
|
| 168 |
|
|
my $real_bl; |
| 169 |
|
|
if (-e $bl) { |
| 170 |
|
|
$real_bl=readlink($bl) || die "can't read link $bl: $!"; |
| 171 |
|
|
$real_bl="$BACKUP_DEST/$host/$dir/$real_bl" if (substr($real_bl,0,1) ne "/"); |
| 172 |
|
|
} else { |
| 173 |
|
|
print "no old backup, this is first run...\n"; |
| 174 |
|
|
} |
| 175 |
|
|
|
| 176 |
|
|
if (-e $bc && $real_bl && $real_bl eq $bc) { |
| 177 |
|
|
print "$share allready backuped...\n"; |
| 178 |
|
|
return; |
| 179 |
|
|
} |
| 180 |
|
|
|
| 181 |
|
|
die "You should really create BACKUP_DEST [$BACKUP_DEST] by hand! " if (!-e $BACKUP_DEST); |
| 182 |
|
|
|
| 183 |
|
|
if (! -e "$BACKUP_DEST/$host") { |
| 184 |
|
|
mkdir "$BACKUP_DEST/$host" || die "can't make dir for host $host, $BACKUP_DEST/$host: $!"; |
| 185 |
|
|
print "created host directory $BACKUP_DEST/$host...\n"; |
| 186 |
|
|
} |
| 187 |
|
|
|
| 188 |
|
|
if (! -e "$BACKUP_DEST/$host/$dir") { |
| 189 |
|
|
mkdir "$BACKUP_DEST/$host/$dir" || die "can't make dir for share $share, $BACKUP_DEST/$host/$dir $!"; |
| 190 |
|
|
print "created dir for share $share, $BACKUP_DEST/$host/$dir...\n"; |
| 191 |
|
|
} |
| 192 |
|
|
|
| 193 |
|
|
mkdir $bc || die "can't make dir for current backup $bc: $!"; |
| 194 |
|
|
|
| 195 |
|
|
my @dirs = ( "/" ); |
| 196 |
|
|
my @smb_dirs = ( "/" ); |
| 197 |
|
|
|
| 198 |
|
|
my $transfer = 0; # bytes transfered over network |
| 199 |
|
|
|
| 200 |
|
|
# this will store all available files and sizes |
| 201 |
|
|
my @files; |
| 202 |
|
|
my %file_size; |
| 203 |
|
|
my %file_atime; |
| 204 |
|
|
my %file_mtime; |
| 205 |
|
|
my %file_md5; |
| 206 |
|
|
|
| 207 |
|
|
my @smb_files; |
| 208 |
|
|
my %smb_size; |
| 209 |
|
|
#my %smb_atime; |
| 210 |
|
|
#my %smb_mtime; |
| 211 |
|
|
my %smb_md5; |
| 212 |
|
|
|
| 213 |
|
|
|
| 214 |
|
|
sub norm_dir { |
| 215 |
|
|
my $foo = shift; |
| 216 |
|
|
my $prefix = shift; |
| 217 |
|
|
$foo =~ s#//+#/#g; |
| 218 |
|
|
$foo =~ s#/+$##g; |
| 219 |
|
|
$foo =~ s#^/+##g; |
| 220 |
|
|
return $prefix.$foo if ($prefix); |
| 221 |
|
|
return $foo; |
| 222 |
|
|
} |
| 223 |
|
|
|
| 224 |
|
|
# read local filesystem |
| 225 |
|
|
my $di = 0; |
| 226 |
|
|
while ($di <= $#dirs && $real_bl) { |
| 227 |
|
|
my $d=$dirs[$di++]; |
| 228 |
|
|
opendir(DIR,"$bl/$d") || warn "opendir($bl/$d): $!\n"; |
| 229 |
|
|
|
| 230 |
|
|
# read .backupignore if exists |
| 231 |
|
|
if (-f "$bl/$d/.backupignore") { |
| 232 |
|
|
open(I,"$bl/$d/.backupignore"); |
| 233 |
|
|
while(<I>) { |
| 234 |
|
|
chomp; |
| 235 |
|
|
push @ignore,norm_dir("$d/$_"); |
| 236 |
|
|
} |
| 237 |
|
|
close(I); |
| 238 |
|
|
print STDERR "ignore: ",join("|",@ignore),"\n"; |
| 239 |
|
|
link "$bl/$d/.backupignore","$bc/$d/.backupignore" || |
| 240 |
|
|
warn "can't copy $bl/$d/.backupignore to current backup dir: $!\n"; |
| 241 |
|
|
} |
| 242 |
|
|
|
| 243 |
|
|
# read .md5sum if exists |
| 244 |
|
|
if (-f "$bl/$d/.md5sum") { |
| 245 |
|
|
open(I,"$bl/$d/.md5sum"); |
| 246 |
|
|
while(<I>) { |
| 247 |
|
|
chomp; |
| 248 |
|
|
my ($md5,$f) = split(/\s+/,$_,2); |
| 249 |
|
|
$file_md5{$f}=$md5; |
| 250 |
|
|
} |
| 251 |
|
|
close(I); |
| 252 |
|
|
} |
| 253 |
|
|
|
| 254 |
|
|
my @clutter = readdir(DIR); |
| 255 |
|
|
foreach my $f (@clutter) { |
| 256 |
|
|
next if ($f eq '.'); |
| 257 |
|
|
next if ($f eq '..'); |
| 258 |
|
|
my $pr = norm_dir("$d/$f"); # path relative |
| 259 |
|
|
my $pf = norm_dir("$d/$f","$bl/"); # path full |
| 260 |
|
|
if (grep(/^\Q$pr\E$/,@ignore) == 0) { |
| 261 |
|
|
if (-f $pf) { |
| 262 |
|
|
push @files,$pr; |
| 263 |
|
|
$file_size{$pr}=(stat($pf))[7]; |
| 264 |
|
|
$file_atime{$pr}=(stat($pf))[8]; |
| 265 |
|
|
$file_mtime{$pr}=(stat($pf))[9]; |
| 266 |
|
|
} elsif (-d $pf) { |
| 267 |
|
|
push @dirs,$pr; |
| 268 |
|
|
} else { |
| 269 |
|
|
print STDERR "unknown type: $pf\n"; |
| 270 |
|
|
} |
| 271 |
|
|
} else { |
| 272 |
|
|
print STDERR "ignored: $pr\n"; |
| 273 |
|
|
} |
| 274 |
|
|
} |
| 275 |
|
|
} |
| 276 |
|
|
|
| 277 |
|
|
xlog($share,($#files+1)." files and ".($#dirs+1)." dirs on local disk before backup"); |
| 278 |
|
|
|
| 279 |
|
|
# read smb filesystem |
| 280 |
|
|
|
| 281 |
|
|
xlog($share,"smb to $share as $param{username}/$param{workgroup}"); |
| 282 |
|
|
|
| 283 |
|
|
# FIX: how to aviod creation of ~/.smb/smb.conf ? |
| 284 |
|
|
$smb = new Filesys::SmbClient(%param) || die "SmbClient :$!\n"; |
| 285 |
|
|
|
| 286 |
|
|
$di = 0; |
| 287 |
|
|
while ($di <= $#smb_dirs) { |
| 288 |
|
|
my $d=$smb_dirs[$di++]; |
| 289 |
|
|
my $pf = norm_dir($d,"smb:$share/"); # path full |
| 290 |
|
|
my $D = $smb->opendir($pf) || warn "smb->opendir($pf): $!\n"; |
| 291 |
|
|
|
| 292 |
|
|
my @clutter = $smb->readdir_struct($D); |
| 293 |
|
|
foreach my $item (@clutter) { |
| 294 |
|
|
my $f = $item->[1]; |
| 295 |
|
|
next if ($f eq '.'); |
| 296 |
|
|
next if ($f eq '..'); |
| 297 |
|
|
my $pr = norm_dir("$d/$f"); # path relative |
| 298 |
|
|
my $pf = norm_dir("$d/$f","smb:$share/"); # path full |
| 299 |
|
|
if (grep(/^\Q$pr\E$/,@ignore) == 0) { |
| 300 |
|
|
if ($item->[0] == main::SMBC_FILE) { |
| 301 |
|
|
push @smb_files,$pr; |
| 302 |
|
|
$smb_size{$pr}=($smb->stat($pf))[7]; |
| 303 |
|
|
$smb_atime{$pr}=($smb->stat($pf))[10]; |
| 304 |
|
|
$smb_mtime{$pr}=($smb->stat($pf))[11]; |
| 305 |
|
|
} elsif ($item->[0] == main::SMBC_DIR) { |
| 306 |
|
|
push @smb_dirs,$pr; |
| 307 |
|
|
} else { |
| 308 |
|
|
print STDERR "unknown type: $pf\n"; |
| 309 |
|
|
} |
| 310 |
|
|
} else { |
| 311 |
|
|
print STDERR "smb ignored: $pr\n"; |
| 312 |
|
|
} |
| 313 |
|
|
} |
| 314 |
|
|
} |
| 315 |
|
|
|
| 316 |
|
|
xlog($share,($#smb_files+1)." files and ".($#smb_dirs+1)." dirs on remote share"); |
| 317 |
|
|
|
| 318 |
|
|
# sync dirs |
| 319 |
|
|
my $lc = List::Compare->new(\@dirs, \@smb_dirs); |
| 320 |
|
|
|
| 321 |
|
|
my @dirs2erase = $lc->get_Lonly; |
| 322 |
|
|
my @dirs2create = $lc->get_Ronly; |
| 323 |
|
|
xlog($share,($#dirs2erase+1)." dirs to erase and ".($#dirs2create+1)." dirs to create"); |
| 324 |
|
|
|
| 325 |
|
|
# create new dirs |
| 326 |
|
|
foreach (sort @smb_dirs) { |
| 327 |
|
|
mkdir "$bc/$_" || warn "mkdir $_: $!\n"; |
| 328 |
|
|
} |
| 329 |
|
|
|
| 330 |
|
|
# sync files |
| 331 |
|
|
$lc = List::Compare->new(\@files, \@smb_files); |
| 332 |
|
|
|
| 333 |
|
|
my @files2erase = $lc->get_Lonly; |
| 334 |
|
|
my @files2create = $lc->get_Ronly; |
| 335 |
|
|
xlog($share,($#files2erase+1)." files to erase and ".($#files2create+1)." files to create"); |
| 336 |
|
|
|
| 337 |
|
|
sub smb_copy { |
| 338 |
|
|
my $smb = shift; |
| 339 |
|
|
|
| 340 |
|
|
my $from = shift; |
| 341 |
|
|
my $to = shift; |
| 342 |
|
|
|
| 343 |
|
|
|
| 344 |
|
|
my $l = 0; |
| 345 |
|
|
|
| 346 |
|
|
foreach my $f (@_) { |
| 347 |
|
|
#print "smb_copy $from/$f -> $to/$f\n"; |
| 348 |
|
|
if (! open(F,"> $to/$f")) { |
| 349 |
|
|
print STDERR "can't open new file $to/$f: $!\n"; |
| 350 |
|
|
next; |
| 351 |
|
|
} |
| 352 |
|
|
|
| 353 |
|
|
my $fd = $smb->open("$from/$f"); |
| 354 |
|
|
if (! $fd) { |
| 355 |
|
|
print STDERR "can't open smb file $from/$f: $!\n"; |
| 356 |
|
|
next; |
| 357 |
|
|
} |
| 358 |
|
|
|
| 359 |
|
|
while (defined(my $b=$smb->read($fd,4096))) { |
| 360 |
|
|
print F $b; |
| 361 |
|
|
$l += length($b); |
| 362 |
|
|
} |
| 363 |
|
|
|
| 364 |
|
|
$smb->close($fd); |
| 365 |
|
|
close(F); |
| 366 |
|
|
|
| 367 |
|
|
# FIX: this fails with -T |
| 368 |
|
|
my ($a,$m) = ($smb->stat("$from/$f"))[10,11]; |
| 369 |
|
|
utime $a, $m, "$to/$f" || |
| 370 |
|
|
warn "can't update utime on $to/$f: $!\n"; |
| 371 |
|
|
|
| 372 |
|
|
} |
| 373 |
|
|
return $l; |
| 374 |
|
|
} |
| 375 |
|
|
|
| 376 |
|
|
# copy new files |
| 377 |
|
|
foreach (@files2create) { |
| 378 |
|
|
$transfer += smb_copy($smb,"smb:$share",$bc,$_); |
| 379 |
|
|
} |
| 380 |
|
|
|
| 381 |
|
|
my $size_sync = 0; |
| 382 |
|
|
my $atime_sync = 0; |
| 383 |
|
|
my $mtime_sync = 0; |
| 384 |
|
|
my @sync_files; |
| 385 |
|
|
my @ln_files; |
| 386 |
|
|
|
| 387 |
|
|
foreach ($lc->get_intersection) { |
| 388 |
|
|
|
| 389 |
|
|
my $f; |
| 390 |
|
|
|
| 391 |
|
|
if ($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 |
dpavlin |
1.3 |
__END__ |
| 443 |
dpavlin |
1.1 |
#------------------------------------------------------------------------- |
| 444 |
|
|
|
| 445 |
dpavlin |
1.3 |
|
| 446 |
|
|
=head1 NAME |
| 447 |
|
|
|
| 448 |
|
|
psinib - Perl Snapshot Is Not Incremental Backup |
| 449 |
|
|
|
| 450 |
|
|
=head1 SYNOPSIS |
| 451 |
|
|
|
| 452 |
|
|
./psinib.pl |
| 453 |
|
|
|
| 454 |
|
|
=head1 DESCRIPTION |
| 455 |
|
|
|
| 456 |
|
|
This script in current version support just backup of Samba (or Micro$oft |
| 457 |
|
|
Winblowz) shares to central disk space. Central disk space is organized in |
| 458 |
|
|
multiple directories named after: |
| 459 |
|
|
|
| 460 |
|
|
=over 4 |
| 461 |
|
|
|
| 462 |
|
|
=item * |
| 463 |
|
|
server which is sharing files to be backed up |
| 464 |
|
|
|
| 465 |
|
|
=item * |
| 466 |
|
|
name of share on server |
| 467 |
|
|
|
| 468 |
|
|
=item * |
| 469 |
|
|
dated directory named like standard ISO date format (YYYYMMDD). |
| 470 |
|
|
|
| 471 |
|
|
=back |
| 472 |
|
|
|
| 473 |
|
|
In each dated directory you will find I<snapshot> of all files on |
| 474 |
|
|
exported share on that particular date. |
| 475 |
|
|
|
| 476 |
|
|
You can also use symlink I<latest> which will lead you to |
| 477 |
|
|
last completed backup. After that you can use some other backup |
| 478 |
|
|
software to transfer I<snapshot> to tape, CD-ROM or some other media. |
| 479 |
|
|
|
| 480 |
|
|
=head2 Design considerations |
| 481 |
|
|
|
| 482 |
|
|
Since taking of share snapshot every day requires a lot of disk space and |
| 483 |
|
|
network bandwidth, B<psinib> uses several techniques to keep disk usage and |
| 484 |
|
|
network traffic at acceptable level: |
| 485 |
|
|
|
| 486 |
|
|
=over 3 |
| 487 |
|
|
|
| 488 |
|
|
=item - usage of hard-links to provide same files in each snapshot (as opposed |
| 489 |
|
|
to have multiple copies of same file) |
| 490 |
|
|
|
| 491 |
|
|
=item - usage of file size, atime and mtime to find changes of files without |
| 492 |
|
|
transferring whole file over network (just share browsing is transfered |
| 493 |
|
|
over network) |
| 494 |
|
|
|
| 495 |
|
|
=item - usage of C<.md5sum> files (compatible with command-line utility |
| 496 |
|
|
C<md5sum> to keep file between snapshots hard-linked |
| 497 |
|
|
|
| 498 |
|
|
=back |
| 499 |
|
|
|
| 500 |
|
|
=head1 CONFIGURATION |
| 501 |
|
|
|
| 502 |
|
|
This section is not yet written. |
| 503 |
|
|
|
| 504 |
|
|
=head1 BUGS and LIMITATIONS |
| 505 |
|
|
|
| 506 |
|
|
There is not real reason why you can't take snapshot more often than |
| 507 |
|
|
one a day. Actually, if you are using B<psinib> to backup Windows workstations |
| 508 |
|
|
they tend to come-and-go, so running B<psinib> several times a day |
| 509 |
|
|
increases your chance of having up-to-date backup (B<psinib> will not |
| 510 |
|
|
make multiple backups for same day if such backup already exists). |
| 511 |
|
|
|
| 512 |
|
|
However, changing that to produce backups which are, for example, hourly |
| 513 |
|
|
is a simple change of C<$DIR_TIME_FMT> which is currently set to |
| 514 |
|
|
C<'%Y%m%d'> (see I<strftime> documentation for explanation of that |
| 515 |
|
|
format). If you change that to C<'%Y%m%d-%H> you can have hourly snapshots |
| 516 |
|
|
(if your network is fast enough, that is...). Also, some of messages in |
| 517 |
|
|
program will sound strange, but other than that it should work. |
| 518 |
|
|
I<You have been warned>. |
| 519 |
|
|
|
| 520 |
|
|
=head1 AUTHOR |
| 521 |
|
|
|
| 522 |
|
|
Dobrica Pavlinusic <dpavlin@rot13.org> |
| 523 |
|
|
|
| 524 |
|
|
L<http://www.rot13.org/~dpavlin/> |
| 525 |
|
|
|
| 526 |
|
|
=head1 LICENSE |
| 527 |
|
|
|
| 528 |
|
|
This product is licensed under GNU Public License (GPL) v2 or later. |
| 529 |
|
|
|
| 530 |
|
|
=cut |
Parent Directory
| 
Revision Log