On Mon, Feb 8, 2016 at 11:34 AM, Linda Walsh <
bash@tlinx.org> wrote:
> Chet Ramey wrote:
>> On 2/8/16 9:59 AM, Andreas Schwab wrote:
>>> Chet Ramey <
chet.ramey@case.edu> writes:
>>>> `cd ..' should fail, since the parent no longer exists, and the pathname
>>>> canonicalization should fail, since there's presumably no longer a valid
>>>> path to reach the current directory. No value for $PWD is correct.
>>> ${PWD%/*} would be a reasonable value. FWIW, this is what ksh uses in
>>> this case, it doesn't fail.
>> Why would that be more reasonable than anything else? It references a
>> path that doesn't exist.
> Um...Not exactly. As long as there's a handle open to the previous path,
> it still exists (at least on linux and unix).
Really?
11:40:24 dave@Vger:~$ mkdir -p a/a
11:40:30 dave@Vger:~$ cd a/a
[remove a in another window]
11:40:49 dave@Vger:~/a/a$ touch file
touch: cannot touch ‘file’: No such file or directory