[Bug 1715753] Re: ln --relative broken on u14, works on u16

[Hans Joachim Desserud]

** Tags added: trusty

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Title:
  ln --relative broken on u14, works on u16

Status in coreutils package in Ubuntu:
  New

Bug description:
  in ubuntu14, the behavior of "ln --relative" seems to be quite broken.
  on ubuntu 16 it works as expected.  can we please backport whatever
  fix from u16 or update coreutils? 8.15 is where they started including
  the 'realpath' binary, maybe they fixed "ln --relative" too.

  u14 INCORRECT:

  $ loop=0; nloops=4; base=/tmp/lntest; rm -rf $base/ && mkdir -p $base/dir &&
  touch $base/dir/file && while ((loop++ < nloops)); do ln -frs $base/dir/file $base/link; readlink -f $base/link; sleep 1; done
  /tmp/lntest/dir/file
  /tmp/lntest/file
  /tmp/lntest/dir/file
  /tmp/lntest/file

  u16 CORRECT:

  $ loop=0; nloops=4; base=/tmp/lntest; rm -rf $base/ && mkdir -p $base/dir &&
  touch $base/dir/file && while ((loop++ < nloops)); do ln -frs $base/dir/file $base/link; readlink -f $base/link; sleep 1; done
  /tmp/lntest/dir/file
  /tmp/lntest/dir/file
  /tmp/lntest/dir/file
  /tmp/lntest/dir/file

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