[Bug 722910] Re: xz/bzip/gzip fails with hardlink errors on ntfs partition (files with > 1 link)

[xhienne]

Thanks. IMHO, the title should no longer mention NTFS. The behavior can
be observed on any filesystem.

Try this, for example, on an ext* FS:
# touch foo
# ln foo bar
# gzip bar
gzip: bar has 1 other link  -- unchanged
# bzip2 bar
bzip2: Input file bar has 1 other link.
# xz bar
xz: bar: Input file has more than one hard link, skipping
# lzma bar
lzma: bar: Input file has more than one hard link, skipping

Note: I have also affected this bug to the gzip project

** Also affects: gzip
   Importance: Undecided
       Status: New

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Title:
  xz/bzip/gzip fails with hardlink errors on ntfs partition (files with
  > 1 link)

Status in gzip:
  New
Status in bzip2 package in Ubuntu:
  Confirmed
Status in xz-utils package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: xz-utils

  After mounting an ntfs partition using dolphin in kubuntu, xz fails to compress any file on the ntfs partition.
  $ [sudo] xz -9 COMP6366_V01_02_15_2011.wmv 
  xz: COMP6366_V01_02_15_2011.wmv: Input file has more than one hard link, skipping

  More information about the file:
  $ ls -la COMP6366_V01_02_15_2011.wmv 
  -rwxrwxrwx 2 root root 332122239 2011-02-15 16:36 COMP6366_V01_02_15_2011.wmv

  Workaround: Renaming the file will allow xz to perform the compression.
  $ mv COMP6366_V01_02_15_2011.wmv COMP6366_V01_02_15_2011.wmv2 && mv COMP6366_V01_02_15_2011.wmv2 COMP6366_V01_02_15_2011.wmv
  $ xz -9 COMP6366_V01_02_15_2011.wmv
  After mounting an ntfs partition using dolphin in kubuntu, xz fails to compress any file on the ntfs partition.
  $ [sudo] xz -9 COMP6366_V01_02_15_2011.wmv 
  xz: COMP6366_V01_02_15_2011.wmv: Input file has more than one hard link, skipping

  More information about the file:
  $ ls -la COMP6366_V01_02_15_2011.wmv 
  -rwxrwxrwx 2 root root 332122239 2011-02-15 16:36 COMP6366_V01_02_15_2011.wmv

  Workaround: Renaming the file will allow xz to perform the compression.
  $ mv COMP6366_V01_02_15_2011.wmv COMP6366_V01_02_15_2011.wmv2 && mv COMP6366_V01_02_15_2011.wmv2 COMP6366_V01_02_15_2011.wmv
  $ xz -9 COMP6366_V01_02_15_2011.wmv
  $ ls -la COMP6366_V01_02_15_2011.wmv.xz 
  -rwxrwxrwx 1 root root 325158580 2011-02-15 16:36 COMP6366_V01_02_15_2011.wmv.xz

  Any file that is modified or placed onto the ntfs partition from
  within ubuntu is fine - this bug only exists for files that already
  existed on my Windows XP system.

  $ lsb_release -rd
  Description:    Ubuntu 10.10
  Release:        10.10
  $ xz -V
  xz (XZ Utils) 4.999.9beta
  liblzma 4.999.9beta
  $ apt-cache policy xz-utils
  xz-utils:
    Installed: 4.999.9beta+20100527-1
    Candidate: 4.999.9beta+20100527-1
    Version table:
   *** 4.999.9beta+20100527-1 0
          500 http://us.archive.ubuntu.com/ubuntu/ maverick/main amd64 Packages
          100 /var/lib/dpkg/status

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: xz-utils 4.999.9beta+20100527-1
  ProcVersionSignature: Ubuntu 2.6.35-23.40-generic 2.6.35.7
  Uname: Linux 2.6.35-23-generic x86_64
  NonfreeKernelModules: nvidia
  Architecture: amd64
  Date: Mon Feb 21 18:39:05 2011
  InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  ProcEnviron:
   LANGUAGE=
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: xz-utils

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