Re: EOF at PS2

[alex xmb ratchev]

On Fri, May 26, 2023, 23:45 Chet Ramey <chet.ramey@case.edu> wrote:

> On 4/26/23 5:38 PM, Grisha Levit wrote:
> > A few issues with EOF being received at PS2:
>
> I finally had a chance to check out the ksh88 behavior on a Solaris 10 VM.
> It's pretty bizarre, but it does point to some improvements when ignoreeof
> is enabled. It seems like the POSIX committee wanted the ksh88 behavior
> without the weird aspects. I didn't check ksh93.
>
> I think we can have bash honor ignoreeof and not exit after delimiting the
> token or command while not acting quite as bizarrely as ksh88.
>
> > The setting of ignoreeof is ignored at PS2:
> >
> > bash --norc -o ignoreeof
> > $ uname \
> >> ^D
> > Linux
> > (bash exits)
>

my opinion
bash in this case shall redraw the cmd , including newline
nevermind..


ksh88 lets ^D delimit the token, executes the command, then doesn't prompt
> and reads input characters until a newline. If line editing is enabled, it
> does not echo them. Then it either exits (no ignoreeof) or prints "Use
> `exit' to terminate..." (ignoreeof) and executes the input it previoulsy
> read while waiting for the newline.
>
> > If the previous line didn't terminate the current token, ^D causes the
> > token (rather than the command) to be terminated and a new PS2 to be
> > printed. The history code treats them as one word.
>
> ksh88 behaves similarly to the above. The ^D delimits the token and the
> command, which executes and echoes `A'. Then it reads input as described
> above until a newline and either exits or prints the ignoreeof message and
> executes the input it read (except it drops the first character).
>
> > And perhaps most surprising, if PS0 contains a command substitution,
> > the wrong prompts are shown:
>
> This has to do with saved parser state, not hard to fix after making the
> changes above.
>
> Chet
>
> --
> ``The lyf so short, the craft so long to lerne.'' - Chaucer
>                  ``Ars longa, vita brevis'' - Hippocrates
> Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/
>
>
>