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ISOINFO(8)							    ISOINFO(8)

NAME
       devdump,	 isoinfo,  isovfy,  isodump - Utility programs for dumping and
       verifying iso9660 images.

SYNOPSIS
       devdump isoimage

       isodump isoimage

       isoinfo [ options ] [ find [ find expression ]]

       isovfy isoimage

DESCRIPTION
       devdump is a crude utility to interactively  display  the  contents  of
       device  or  filesystem  images.	The initial screen is a display of the
       first 256 bytes of the first 2048 byte sector.  The  commands  are  the
       same as with isodump.

       isodump	is  a  crude  utility to interactively display the contents of
       iso9660 images in order to verify  directory  integrity.	  The  initial
       screen  is  a  display of the first part of the root directory, and the
       prompt shows you the extent number and offset in the extent.

	      You can use the 'a' and 'b' commands to move backwards and  for‐
	      wards  within  the  image. The 'g' command allows you to goto an
	      arbitrary extent, and the 'f' command specifies a search	string
	      to  be  used.  The  '+'  command	searches  forward for the next
	      instance of the search string, and the 'q' command exits devdump
	      or isodump.

       isoinfo	is  a  utility	to  perform directory like listings of iso9660
       images.

       isovfy is a utility to verify the integrity of an iso9660  image.  Most
       of  the	tests in isovfy were added after bugs were discovered in early
       versions of mkisofs.  It isn't all that clear how useful this  is  any‐
       more, but it doesn't hurt to have this around.

OPTIONS
       The   options   common	to   all   programs   are   -help,-h,-version,
       i=name,dev=name.	 The  isoinfo  program	has  additional	 command  line
       options. The options are:

       -help

       -h     print a summary of all options.

       -d     Print  information  from	the primary volume descriptor (PVD) of
	      the iso9660 image. This includes information about  Rock	Ridge,
	      Joliet extensions and Eltorito boot information if present.

       -f     generate	output as if a 'find . -print' command had been run on
	      the iso9660 image. You should not use the -l image with  the  -f
	      option.	The  same  output  is  created by calling isoinfo with
	      -find -print

       -find find expression
	      This option acts a separator. If it is used, all isoinfo options
	      must  be	to  the	 left of the -find option. To the right of the
	      -find option, mkisofs accepts the find command line syntax only.
	      If  the find expression includes a -print or -ls promary, the -l
	      to isoinfo is ignored.  If  the  find  expression	 evaluates  as
	      true, the selected action (e.g.  list the ISO-9660 directory) is
	      performed.

       -i iso_image
	      Specifies the path of the iso9660 image that we wish to examine.
	      The options -i and dev=target are mutual exclusive.

       dev=target
	      Sets  the SCSI target for the drive, see notes above.  A typical
	      device specification is dev=6,0 .	 If a filename	must  be  pro‐
	      vided  together  with  the  numerical  target specification, the
	      filename is implementation specific.  The	 correct  filename  in
	      this  case  can  be  found in the system specific manuals of the
	      target operating system.	On a FreeBSD system without  CAM  sup‐
	      port,  you need to use the control device (e.g.  /dev/rcd0.ctl).
	      A	 correct  device   specification   in	this   case   may   be
	      dev=/dev/rcd0.ctl:@ .

	      On Linux, drives connected to a parallel port adapter are mapped
	      to a virtual SCSI bus. Different adapters are mapped to  differ‐
	      ent targets on this virtual SCSI bus.

	      If  no  dev  option  is present, the program will try to get the
	      device from the CDR_DEVICE environment.

	      If the argument to the dev= option does not contain the  charac‐
	      ters  ',',  '/',	'@' or ':', it is interpreted as an label name
	      that may be found in the file /etc/default/cdrecord  (see	 FILES
	      section).

	      The options -i and dev=target are mutual exclusive.

       -debug Print  additional	 debug information. This enables e.g. printing
	      of all directory entries if a file has more than	one  directory
	      entry  and  printing of more information from the primary volume
	      descriptor.

	      In debug mode, Rock Ridge information is parsed with -R even  if
	      it is not standard compliant.

       -l     generate	output	as  if	a 'ls -lR' command had been run on the
	      iso9660 image.  You should not use the  -f  image	 with  the  -l
	      option.

       -N sector
	      Quick hack to help examine single session disc files that are to
	      be written to a multi-session disc. The sector number  specified
	      is  the sector number at which the iso9660 image should be writ‐
	      ten when send to the cd-writer. Not used for the	first  session
	      on the disc.

       -p     Print path table information.

       -R     Extract  information from Rock Ridge extensions (if present) for
	      permissions, file names and ownerships.

       -J     Extract information from Joliet extensions (if present) for file
	      names.

       -j charset
	      Convert  Joliet file names (if present) to the supplied charset.
	      See mkisofs(8) for details.

       -T sector
	      Quick hack  to  help  examine  multi-session  images  that  have
	      already  been  burned to a multi-session disc. The sector number
	      specified is the sector number for the start of the  session  we
	      wish to display.

       -x pathname
	      Extract specified file to stdout.

AUTHOR
       The  author  of	the original sources (1993 ... 1998) is Eric Youngdale
       <ericy@gnu.ai.mit.edu> or <eric@andante.jic.com> is to blame for	 these
       shoddy hacks.  Joerg Schilling wrote the SCSI transport library and its
       adaptation layer to the programs and newer parts (starting  from	 1999)
       of  the	utilities,  this  makes	 them  Copyright  (C)  1999-2004 Joerg
       Schilling.  Patches  to	improve	 general  usability  would  be	gladly
       accepted.

BUGS
       The user interface really sucks.

FUTURE IMPROVEMENTS
       These  utilities	 are  really  quick  hacks,  which are very useful for
       debugging problems in mkisofs or in an iso9660 filesystem. In the  long
       run,  it would be nice to have a daemon that would NFS export a iso9660
       image.

       The isoinfo program is probably the program that is of the most use  to
       the general user.

AVAILABILITY
       These  utilities	 come  with  the cdrtools package, and the primary ftp
       site is ftp.berlios.de in /pub/cdrecord and many	 other	mirror	sites.
       Despite the name, the software is not beta.

ENVIRONMENT
       CDR_DEVICE
	      This may either hold a device identifier that is suitable to the
	      open call of the SCSI transport library or a label in  the  file
	      /etc/default/cdrecord.

       RSH    If  the  RSH  environment is present, the remote connection will
	      not be created via rcmd(3) but by calling the program pointed to
	      by  RSH.	 Use  e.g.   RSH=/usr/bin/ssh to create a secure shell
	      connection.

	      Note that this forces the program to create a pipe to the rsh(1)
	      program and disallows the program to directly access the network
	      socket to the remote server.  This makes it impossible to set up
	      performance parameters and slows down the connection compared to
	      a root initiated rcmd(3) connection.

       RSCSI  If the RSCSI environment is present, the remote SCSI server will
	      not  be  the  program  /opt/schily/sbin/rscsi  but  the  program
	      pointed to by RSCSI.  Note that the remote SCSI  server  program
	      name  will  be  ignored  if you log in using an account that has
	      been created with a remote SCSI server program as login shell.

FILES
       /etc/default/cdrecord
	      Default  values  can  be	set  for  the  following  options   in
	      /etc/default/cdrecord.

	      CDR_DEVICE
		     This may either hold a device identifier that is suitable
		     to the open call of the SCSI transport library or a label
		     in the file /etc/default/cdrecord that allows to identify
		     a specific drive on the system.

	      Any other label
		     is an identifier for a  specific  drive  on  the  system.
		     Such  an  identifier  may not contain the characters ',',
		     '/', '@' or ':'.

		     Each line that follows a label contains a	TAB  separated
		     list of items.  Currently, four items are recognized: the
		     SCSI ID of the drive, the default speed  that  should  be
		     used for this drive, the default FIFO size that should be
		     used for this drive and drive specific options. The  val‐
		     ues  for  speed and fifosize may be set to -1 to tell the
		     program to	 use  the  global  defaults.   The  value  for
		     driveropts may be set to "" if no driveropts are used.  A
		     typical line may look this way:

		     teac1= 0,5,0   4	 8m   ""

		     yamaha= 1,6,0  -1	 -1   burnfree

		     This tells the program that a drive  named	 teac1	is  at
		     scsibus  0, target 5, lun 0 and should be used with speed
		     4 and a FIFO size of 8 MB.	 A second drive may  be	 found
		     at	 scsibus 1, target 6, lun 0 and uses the default speed
		     and the default FIFO size.

SEE ALSO
       mkisofs(8), cdrecord(1), readcd(1), scg(7), rcmd(3), ssh(1).

Version 3.0			   10/11/24			    ISOINFO(8)
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