Finding symbolic links that are outside a tree (comp.unix.shell)

Finding symbolic links that are outside a tree (comp.unix.shell)

[Thorsten Kampe]

Hi, this has originally been posted to comp.unix.shell by "rh0dium
<sklass@pointcircle.com" and I couldn't find a solution for zsh.

So can this be done with zsh globbing? I couldn't get any further as
"print -l **/*(@)" which prints only symbolic links but doesn't do
anything for "that are outside a tree".

Thorsten

******************************************************************
Can anyone help me with a simple script to find links ouside of a
tree.
 What I want is given the following tree two results would show up

tree
   a
      1 -> ../b
      2
   b
      1 -> ../../../foo
      2 -> ../c/1
   c
      1 ->/foo/bar
      2

So I would expect 2 results
b1 and c1 should be the output.  I just can't think of a slick way to
script this.  Anyone care to offer a bit of assistance?

I'd love a zsh function or bash function which does this.
******************************************************************

Re: Finding symbolic links that are outside a tree (comp.unix.shell)

[Bart Schaefer]

On Jun 7,  5:01pm, Thorsten Kampe wrote:
} Subject: Finding symbolic links that are outside a tree (comp.unix.shell)
}
} So can this be done with zsh globbing? I couldn't get any further as
} "print -l **/*(@)" which prints only symbolic links but doesn't do
} anything for "that are outside a tree".

I'm not entirely sure I understand the question, but I *think* the
answer is to begin with something like

    function follow () {
      stat -A reply +link $REPLY
      if [[ $reply != /* ]]
      then reply=( $PWD/$reply )
      fi
    }

    zmodload -i zsh/stat
    declare -a links
    links=( **/*(@+follow) )
    links=( ${links#$PWD/} )

    integer n=${(@)#${(s:/:)PWD}}

Then walk the $links array and print every entry that begins with a slash
or has more leading ../ than the value of $n.

For older versions of zsh you need

    links=( **/*(@e:follow:) )

instead of the +follow shorthand.