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|
#!/usr/bin/perl -w
################################################################
#
# 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;
# buffer size for reading
my $bufsize = 4*1024*1024;
my ($opt_skip, $opt_disk, $opt_input, $opt_verbose);
$opt_verbose = 0;
while (@ARGV) {
if ($ARGV[0] eq '--skip') {
shift @ARGV;
$opt_skip = shift @ARGV;
next;
}
if ($ARGV[0] eq '--disk') {
shift @ARGV;
$opt_disk = shift @ARGV;
next;
}
if ($ARGV[0] eq '--input') {
shift @ARGV;
$opt_input = shift @ARGV;
next;
}
if ($ARGV[0] eq '--verbose' || $ARGV[0] eq '-v') {
shift @ARGV;
$opt_verbose++;
next;
}
last;
}
die "need to specify disk image\n" unless $opt_disk;
open(F, '<', $opt_disk) || die "$opt_disk: $!\n";
if ($opt_input) {
open(S, '<', $opt_input) || die "$opt_input: $!\n";
} else {
open(S, '<&STDIN') || die "can't dup stdin: $!\n";
}
# skip build status
if ($opt_skip) {
seek(S, $opt_skip, 0) || die "seek: $!\n";
}
my %done;
while (<S>) {
chomp;
last unless length $_;
my ($filetype, $file, $filesize, $blksize, @blocks) = split(/ /);
die("invalid input '$_'\n") unless defined($file);
$file =~ s/%([a-fA-F0-9]{2})/chr(hex($1))/ge;
die("bad file '$file'\n") if "/$file/" =~ /\/\.{0,2}\//s;
if ($file =~ /^(.*)\//s) {
die("file without directory: $file\n") unless $done{$1} && $done{$1} eq 'd';
}
if ($filetype eq 'd') { # dir
print "$file\n" if $opt_verbose && $opt_verbose > 1;
mkdir($file) || die("mkdir $file: $!\n");
$done{$file} = 'd';
next;
}
if ($filetype eq 'l') { # symlink
my $target = $filesize;
die("symlink without target\n") unless defined $target;
$target =~ s/%([a-fA-F0-9]{2})/chr(hex($1))/ge;
die("bad symlink: $target\n") if "/$target/" =~ /\/\.?\//s;
if ("/$target/" =~ /^(\/\.\.)+\/(.*?)$/s) {
my ($head, $tail) = ($1, $2);
die("bad upref in symlink: $target\n") if "/$tail/" =~ /\/\.\.\//s;
die("bad upref in symlink: $target\n") if ($head =~ y!/!!) > ($file =~ y!/!!);
} else {
die("bad upref in symlink: $target\n") if "/$target/" =~ /\/\.\.\//s;
}
print "$file\n" if $opt_verbose && !($opt_verbose == 1 && $file =~ /^KIWI\/.*\//);
symlink($target, $file) || die("symlink $target $file: $!\n");
$done{$file} = 'l';
next;
}
die("illegal file type: $filetype\n") unless $filetype eq 'f';
die "invalid input '$_'\n" if !@blocks && $filesize;
$done{$file} = 'f';
$filesize = int($filesize);
if ($filesize == 0) {
print "$file\n" if $opt_verbose && !($opt_verbose == 1 && $file =~ /^KIWI\/.*\//);
open (O, '>', $file) or die "$file: $!\n";
close O;
next;
}
$blksize = int($blksize);
die "$file: invalid block size $blksize\n" unless $blksize > 0 && $blksize <= $bufsize;
my $maxblocks = int($bufsize/$blksize);
print "$file\n" if $opt_verbose && !($opt_verbose == 1 && $file =~ /^KIWI\/.*\//);
open (O, '>', $file) or die "$file: $!\n";
for my $block (@blocks) {
my $end;
($block, $end) = split(/-/, $block);
$block = int($block);
if ($block == 0) { # a hole!
$end = (($end || 0) + 1) * $blksize;
$end = $filesize if $end > $filesize;
seek(O, $end, 1);
$filesize -= $end;
next;
}
$end = $block unless $end;
$end = int($end);
seek(F, $block*$blksize, 0) || die "$file: seek: $!\n";
while ($block <= $end && $filesize) {
my $size;
if ($end == $block) {
$size = $blksize;
++$block;
} elsif ($maxblocks >= $end-$block) {
$size = ($end-$block)*$blksize;
$block += $end-$block;
} else {
$size = $maxblocks*$blksize;
$block += $maxblocks;
}
$size = $filesize if $size > $filesize;
my $buf;
(sysread(F, $buf, $size) || 0) == $size || die("$file: read: $!\n");
$filesize -= $size;
(syswrite(O, $buf) || 0) == length($buf) || die("$file: write error\n");
}
}
close(O) || die("$file: close error: $!\n");
# sanity check
die "$file: invalid file size ($filesize byes left)\n" if $filesize != 0;
}
|
