David Korn wrote:
> cc: John.Zolnowsky at Sun.COM
> Subject: Re: Re: [ksh93-integration-discuss] Non-existent directories in
> $PATH and stat caching
> --------
>
>> Once a utility has been searched for and found (either as a
>> result of this specific search or as part of an unspecified
>> shell startup activity), an implementation may remember its
>> location and need not search for the utility again unless the
>> PATH variable has been the subject of an assignment. If the
>> remembered location fails for a subsequent invocation, the
>> shell shall repeat the search to find the new location of the
>> utility, if any.
>>
>
> Had the lookup for this script been successful with the shell
> previously? If so then you are correct that the shell
> must do the rescan and this is a bug. Otherwise, this sentence
> does not apply.
No, ~/bin had been added to $PATH before ~/bin existed, and the scripts
are unique names not found elsewhere in $PATH. After setting $PATH
the first time, the stat on "/home/ivan/bin" fails, so ksh93 never
attempts looking for "/home/ivan/bin/foo".
I also found that PATH=$PATH wasn't enough to get ksh93 to notice that
/home/ivan/bin now exists. I had to change PATH, either by adding a new
directory or by resetting it like this:
I=$PATH
PATH=/bin
PATH=$I
Ivan.
