NAME
Device::Cdio::ISO9660::FS - Class for ISO 9660 CD reading
SYNOPSIS
This encapsulates ISO 9660 Filesystem aspects of CD Tracks. As such this is a This library however needs to be used in conjunction with Device::Cdio::ISO9660.
use Device::Cdio::ISO9660:FS;
$cd = Device::Cdio::ISO9660::FS->new(-source=>'/dev/cdrom');
$statbuf = $cd->stat ($iso9660_path.$local_filename);
$blocks = POSIX::ceil($statbuf->{size} / $perlcdio::ISO_BLOCKSIZE);
for (my $i = 0; $i < $blocks; $i++) {
my $buf = $cd->read_data_blocks ($statbuf->{LSN} + $i);
die if !defined($buf);
}
print $buf;DESCRIPTION
This is an Object-Oriented interface to the GNU CD Input and Control library (libcdio) which is written in C. This class handles ISO 9660 aspects of a tracks from a CD in a CD-ROM or as a track of a CD image. A CD image is distinct from an ISO 9660 image in that a CD image contains other CD-line information (e.g. tracks, information or assocated with the CD). See also Device::Cdio::ISO9660::IFS for working with an ISO 9660 image.
This is a subclass of Device::Cdio::Device.
CALLING ROUTINES
Routines accept named parameters as well as positional parameters. For named parameters, each argument name is preceded by a dash. For example:
Device::Cdio::ISO9660::FS->new(-source=>'MYISO.CUE')Each argument name is preceded by a dash. Neither case nor order matters in the argument list. -driver_id, -Driver_ID, and -DRIVER_ID are all acceptable. In fact, only the first argument needs to begin with a dash. If a dash is present in the first argument, we assume dashes for the subsequent parameters.
In the documentation below and elsewhere in this package the parameter name that can be used in this style of call is given in the parameter list. For example, for "close tray the documentation below reads:
close_tray(drive=undef, driver_id=$perlcdio::DRIVER_UNKNOWN)
-> ($drc, $driver_id)So the parameter names are "drive", and "driver_id". Neither parameter is required. If "drive" is not specified, a value of "undef" will be used. And if "driver_id" is not specified, a value of $perlcdio::DRIVER_UNKNOWN is used.
The older, more traditional style of positional parameters is also supported. So the "have_driver example from above can also be written:
Cdio::have_driver('GNU/Linux')Finally, since no parameter name can be confused with a an integer, negative values will not get confused as a named parameter.
find_lsn
find_lsn(lsn)->$stat_href
Find the filesystem entry that contains LSN and statu return information about it. Undef is returned on error.
readdir
readdir(dirname)->@iso_stat
Read path (a directory) and return a list of iso9660 stat references
Each item of @iso_stat is a hash reference which contains
- LSN
-
the Logical sector number (an integer)
- size
-
the total size of the file in bytes
- sec_size
-
the number of sectors allocated
- filename
-
the file name of the statbuf entry
- XA
-
if the file has XA attributes; 0 if not
- is_dir
-
1 if a directory; 0 if a not;
FIXME: If you look at iso9660.h you'll see more fields, such as for Rock-Ridge specific fields or XA specific fields. Eventually these will be added. Volunteers?
read_pvd
read_pvd()->pvd
Read the Super block of an ISO 9660 image. This is the rimary Volume Descriptor (PVD) and perhaps a Supplemental Volume Descriptor if (Joliet) extensions are acceptable.
read_superblock
read_superblock(iso_mask=$libiso9660::EXTENSION_NONE)->bool
Read the Super block of an ISO 9660 image. This is the rimary Volume Descriptor (PVD) and perhaps a Supplemental Volume Descriptor if (Joliet) extensions are acceptable.
stat
stat(path, translate=0, mode2=0)->\%stat
Return file status for path name psz_path. NULL is returned on error.
If translate is 1, version numbers in the ISO 9660 name are dropped, i.e. ;1 is removed and if level 1 ISO-9660 names are lowercased.
Mode2 is used only if translate is 1 and is a hack that really should go away in libcdio sometime. If set use mode 2 reading, otherwise use mode 1 reading.
Each item of @iso_stat is a hash reference which contains
- LSN
-
the Logical sector number (an integer)
- size
-
the total size of the file in bytes
- sec_size
-
the number of sectors allocated
- filename
-
the file name of the statbuf entry
- XA
-
if the file has XA attributes; 0 if not
- is_dir
-
1 if a directory; 0 if a not;
SEE ALSO
This is a sublcass of Device::Cdio::Device. See Device::Cdio::ISO9660::IFS for working with ISO 9660 images.
perliso9660 is the lower-level interface to libiso9660, the ISO 9660 library of libcdio.
http://www.gnu.org/software/libcdio/doxygen/iso9660_8h.html is documentation via doxygen of libiso9660. doxygen.
AUTHORS
Rocky Bernstein <rocky at cpan.org>.
COPYRIGHT
Copyright (C) 2006 Rocky Bernstein <rocky@cpan.org>
This program 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 of the License, or (at your option) any later version.
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; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA