Device::Cdio::ISO9660::FS.3pm

Langue: en

Autres versions - même langue

Version: 2008-11-05 (ubuntu - 07/07/09)

Section: 3 (Bibliothèques de fonctions)

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)->\%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.

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 (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