Re: Check existence but not dereference symlink

[Andreas Kusalananda Kähäri]

On Fri, Mar 26, 2021 at 10:55:05PM +0100, Alex fxmbsw7 Ratchev wrote:
> and [[ -e doesnt dereference

It does dereference symbolic links:

        $ touch file
        $ ln -s file link
        $ ls -l
        total 0
        -rw-r--r--  1 myself  wheel  0 Mar 27 13:13 file
        lrwxr-xr-x  1 myself  wheel  4 Mar 27 13:14 link -> file
        $ [[ -e link ]] && echo exists
        exists
        $ rm file
        $ [[ -e link ]] && echo exists
        $ [[ -h link ]] && echo is link
        is link

> you specify a not non existing position so it returns true

I don't understand what you want to say with this.

Also please consider collecting your replies in longer coherent messages
rather than firing off a stream of consiousness in two line chunks per
message.

Regards,

> 
> On Fri, Mar 26, 2021 at 10:20 PM Peng Yu <pengyu.ut@gmail.com> wrote:
> >
> > Hi,
> >
> > ln -s 1.txt a.txt
> > [[ -a a.txt ]]; echo $?
> > 1
> > [[ -e a.txt ]]; echo $?
> > 1
> >
> > [[ -e path ]] and [[ -e path ]] will deference symlink. If the target
> > does not exist, it will return an error.
> >
> > I want to check the existence of a path without dereferencing symlink.
> > I come up with this, but it is a little verbose. Is this the best way
> > to do so?
> >
> > [[ -f path || -h path || -d path ]]
> >
> > --
> > Regards,
> > Peng
> >

-- 
Andreas (Kusalananda) Kähäri
SciLifeLab, NBIS, ICM
Uppsala University, Sweden

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