File report iso image application/octet-stream

[achab]

Binary package hint: file

In Kubuntu 9.04 the 'file' command returns application/x-iso9660-image for an iso 9660 image.
In Kubuntu 9.10 the 'file' command returns application/octet/stream for the same iso 9660 image.

file version 5.03-1

To check;
Create an iso image with
$ genisoimage -o myiso.iso ~/somefolder

Check mime type with
file --mime myiso.iso

It seems to affect the package "uck" as it checks the mime type of the file.
To check try to create a custom image of karmic with uck.
It appears a message that the files seems not to be an iso 9660 file.

ProblemType: Bug
Architecture: i386
Date: Fri Oct 23 01:03:14 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/kdeinit4
LiveMediaBuild: Kubuntu 9.10 "Karmic Koala" - Release Candidate i386 (20091020.2)
Package: kdelibs-bin 4:4.3.2-0ubuntu7
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: kde4libs
Uname: Linux 2.6.31-14-generic i686

[Victor Engmark (victor-engmark)]

Second this - I used the following command to check for ISO files, and it doesn't work anymore:
if [ `expr "$(file -b "$iso_file")" : ".*UDF filesystem data.*"` -eq 0 ]

Current result:
ISO 9660 CD-ROM filesystem data 'CDROM '

[TJ (tj)]

The attached patch can be applied to the installed "/usr/share/file/magic" database and then recompiled to correct the recognition of ISO images as application/x-iso9660-image. The patch also contains a fix for bug #533553 "Bad tabs in ssh magic causes bad string and compilation warning".

An updated package will be available in my PPA shortly and I'll add a debdiff here for the package.

[TJ (tj)]

To apply the patch in comment #3 do:

wget http://launchpadlibrarian.net/40378845/magic.patch
sudo patch -p1 /usr/share/file/magic magic.patch
cd /usr/share/file
sudo file -C
cd ~

Testing:
file -bi xubuntu-10.04-desktop-i386.iso
application/x-iso9660-image; charset=binary

[Mark Rose (markrose)]

Thanks, TJ!

[TJ (tj)]

file (5.03-5ubuntu1) lucid; urgency=low

  * Fix recognition of mime-type application/x-iso9660-image (LP: 458677)
    - add debian/patches/300-magic-fix-iso9660-image.patch
  * Fix bad tabs for OpenSSH DSA/RSA public keys (LP: 533553)
    - fix debian/patches/208-magic-add-ssh.patch

 -- TJ <email address hidden> Sat, 6 Mar 2010 23:30:00 +0000

[Nigel Babu (nigelbabu)]

Unsubsribing reviewers and subscribing sponsors

[Benjamin Drung (bdrung)]

Thanks for the debdiff. I uploaded it. One small thing: You forgot to update the Maintainer field (attached the updated patch).

Please forward your changes. Then we can sync the package again.

[Benjamin Drung (bdrung)]

Forgot the diff. Here it is.

[Benjamin Drung (bdrung)]

You forgot the # before the bug numbers. Therefore closing this bug manually.

file (5.03-5ubuntu1) lucid; urgency=low

  * Fix recognition of mime-type application/x-iso9660-image (LP: #458677)
    - add debian/patches/300-magic-fix-iso9660-image.patch
  * Fix bad tabs for OpenSSH DSA/RSA public keys (LP: #533553)
    - fix debian/patches/208-magic-add-ssh.patch
 -- TJ <email address hidden> Sat, 6 Mar 2010 23:30:00 +0000

[Barry Warsaw (barry)]

This has apparently been fixed in wheezy (file 5.08) so I'm going to drop the Ubuntu-only delta in Precise.

@chemistry[~:1002]% file --mime myiso.iso
myiso.iso: application/x-iso9660-image; charset=binary
@chemistry[~:1004]% file --version
file-5.08
magic file from /etc/magic:/usr/share/misc/magic