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|
#!/usr/bin/perl -w
# compute the blocks used by a file
# usage:
# computeblocklists [options] <files...>
# options:
# --padstart NUM, --padend NUM, --verbose
#
# output:
# <file base name> <size> <blocksize> <block numbers...>
#
# a block is either a number or a range (start-end)
#
################################################################
#
# Copyright (c) 1995-2014 SUSE Linux Products GmbH
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or 3 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program (see the file COPYING); if not, write to the
# Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#
################################################################
use strict;
my ($opt_padstart, $opt_padend, $opt_verbose, $opt_manifest, $opt_mani0);
$opt_verbose = 0;
while (@ARGV) {
if ($ARGV[0] eq '--padstart') {
shift @ARGV;
$opt_padstart = shift @ARGV;
next;
}
if ($ARGV[0] eq '--padend') {
shift @ARGV;
$opt_padend = shift @ARGV;
next;
}
if ($ARGV[0] eq '--verbose' || $ARGV[0] eq '-v') {
shift @ARGV;
$opt_verbose++;
next;
}
if ($ARGV[0] eq '-0') {
shift @ARGV;
$opt_mani0 = 1;
next;
}
if ($ARGV[0] eq '--manifest') {
shift @ARGV;
$opt_manifest = shift @ARGV;
next;
}
last;
}
print "\n"x$opt_padstart if $opt_padstart;
if ($opt_manifest) {
if ($opt_manifest eq '-') {
open(MANIFEST, '<&STDIN') || die("STDIN dup: $!\n");
} else {
open(MANIFEST, '<', $opt_manifest) || die("$opt_manifest: $!\n");
}
}
while (1) {
my $file;
if (@ARGV) {
$file = shift @ARGV;
} elsif ($opt_manifest) {
if ($opt_mani0) {
local $/ = "\0";
$file = <MANIFEST>;
last unless defined $file;
$file =~ s/\0$//s;
} else {
$file = <MANIFEST>;
last unless defined $file;
chomp $file;
}
} else {
last;
}
my $n = $file;
$n =~ s/([\000-\037 %])/sprintf("%%%02X", ord($1))/ges;
if (-l $file) {
print STDERR "$file\n" if $opt_verbose && !($opt_verbose == 1 && $file =~ /^KIWI\/.*\//);
my $c = readlink($file);
die("$file: readlink: $!\n") unless defined $c;
if ("/$c/" =~ /\/\.?\//s) {
print STDERR "$file: bad symlink ($c) ignored\n";
next;
}
if ("/$c/" =~ /^(\/\.\.)+\/(.*?)$/s) {
my ($head, $tail) = ($1, $2);
if (("/$tail/" =~ /\/\.\.\//s) || (($head =~ y!/!!) > ($file =~ y!/!!))) {
print STDERR "$file: bad symlink ($c) ignored\n";
next;
}
} else {
if ("/$c/" =~ /\/\.\.\//s) {
print STDERR "$file: bad symlink ($c) ignored\n";
next;
}
}
$c =~ s/([\000-\037 %])/sprintf("%%%02X", ord($1))/ges;
print "l $n $c\n";
next;
} elsif (-d _) {
print STDERR "$file\n" if $opt_verbose && $opt_verbose > 1;
my @stat = stat(_);
print "d $n\n";
next;
} elsif (!-f _) {
next;
}
print STDERR "$file\n" if $opt_verbose && !($opt_verbose == 1 && $file =~ /^KIWI\/.*\//);
if (!open(F, '<', $file)) {
print STDERR "$file: $!";
next;
}
my @stat = stat(F);
die unless @stat;
my $st_size = $stat[7];
if ($st_size == 0) {
print "f $n 0\n";
close F;
next;
}
my $bsize = 'xxxx';
ioctl(F, 2, $bsize) || ioctl(F, 536870914, $bsize) || die("FIGETBSZ: $!\n");
$bsize = unpack("L", $bsize);
die("$file: empty blocksize\n") unless $bsize != 0;
print "f $n $st_size $bsize";
my $blocks = int(($st_size+$bsize-1)/$bsize);
my ($firstblock, $lastblock);
for ($b = 0; $b < $blocks; ++$b) {
my $block = pack('I', $b);
if (not defined ioctl(F, 1, $block)) {
if (not defined ioctl(F, 536870913, $block)) {
die "$file: $!\n";
}
}
$block = unpack('I', $block);
if (!$firstblock && defined($firstblock)) {
# last block was hole
if (!$block) {
$lastblock++; # count holes, 0-2 means three hole blocks
} else {
# switch back from 'hole mode' into normal mode
printf "-$lastblock" if defined($firstblock) && $firstblock != $lastblock;
print " $block";
$firstblock = $lastblock = $block;
}
next;
}
if (!$firstblock || $lastblock + 1 != $block) {
# start of a new run
printf "-$lastblock" if defined($firstblock) && $firstblock != $lastblock;
print " $block";
$firstblock = $block;
}
$lastblock = $block;
}
# finish last run
printf "-$lastblock" if defined($firstblock) && $firstblock != $lastblock;
close F;
print "\n";
}
print "\n"x$opt_padend if $opt_padend;
|
