[Bug 1763570] Re: file does not fully recognize ISO images

[halogen2]

This is fixed in 22.04.  Thanks!

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Title:
  file does not fully recognize ISO images

Status in file package in Ubuntu:
  Confirmed

Bug description:
  Environment:

  Xubuntu 18.04

  $ lsb_release -rd
  Description:    Ubuntu Bionic Beaver (development branch)
  Release:        18.04

  $ apt-cache policy file
  file:
    Installed: 1:5.32-2
    Candidate: 1:5.32-2
    Version table:
   *** 1:5.32-2 500
          500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
          100 /var/lib/dpkg/status

  
  Steps-to-reproduce:

  1) Download Xubuntu 16.04 ISO from
  http://cdimages.ubuntu.com/xubuntu/releases/16.04/release/xubuntu-16.04-desktop-
  amd64.iso

  2) run: file --mime-type xubuntu-16.04-desktop-amd64.iso

  3) run: file xubuntu-16.04-desktop-amd64.iso

  
  Expected results:

  Result of (2) should be:
  $ file --mime-type xubuntu-16.04-desktop-amd64.iso
  xubuntu-16.04-desktop-amd64.iso: application/x-iso9660-image

  ... and result of (3) should be:
  $ file xubuntu-16.04-desktop-amd64.iso
  xubuntu-16.04-desktop-amd64.iso: DOS/MBR boot sector ISO 9660 CD-ROM filesystem data (DOS/MBR boot sector) 'Xubuntu 16.04 LTS amd64' (bootable); partition 2 : ID=0xef, start-CHS (0x3ff,254,63), end-CHS (0x3ff,254,63), startsector 2410708, 4736 sectors

  
  Actual results:

  $ file --mime-type xubuntu-16.04-desktop-amd64.iso
  xubuntu-16.04-desktop-amd64.iso: application/octet-stream

  $ file xubuntu-16.04-desktop-amd64.iso
  xubuntu-16.04-desktop-amd64.iso: DOS/MBR boot sector; partition 2 : ID=0xef, start-CHS (0x3ff,254,63), end-CHS (0x3ff,254,63), startsector 2410708, 4736 sectors

  
  ubuntuforums thread: https://ubuntuforums.org/showthread.php?t=2388736

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