Re: Bug in bash 4.4-beta: suspending and restarting "man" program

[Keith Thompson]

On Wed, Nov 11, 2015 at 3:16 PM, Keith Thompson <keithsthompson@gmail.com> wrote:

On Wed, Nov 11, 2015 at 11:55 AM, Chet Ramey <chet.ramey@case.edu> wrote:

On 11/10/15 10:03 PM, Keith Thompson wrote:
> On Tue, Nov 10, 2015 at 2:42 PM, Keith Thompson <keithsthompson@gmail.com
> <mailto:keithsthompson@gmail.com>> wrote:
>
>     On Tue, Nov 10, 2015 at 1:57 PM, Andreas Schwab <schwab@linux-m68k.org
>     <mailto:schwab@linux-m68k.org>> wrote:
>
>         Chet Ramey <chet.ramey@case.edu <mailto:chet.ramey@case.edu>> writes:
>
>         > I can make bash blow away the original signal dispositions and pretend they
>         > were SIG_DFL when an interactive shell starts, if there is no alternative.
>
>         Given that login(1) has the same behaviour there is probably no
>         alternative.
>
>     Hmm. I just tried bash 4.4-beta on a Linux console (Ctrl-Alt-F1), and
>     Ctrl-Z works correctly.
>     I verified that the shell's parent process was "login".
>     Perhaps (at least the Debian version of) login(1) *doesn't* do that.
>
> I'm going to hold off on contacting the rxvt and urxvt developers
> for now.  If you decide to modify bash to blow away the original signal
> dispositions, there's no point in reporting this as a bug in rxvt.
>
> Does that make sense?

Yeah, that's fine.  I will modify bash to set the original signal
dispositions to SIG_DFL in interactive shells.

 

Does that mean reverting default_tty_job_signals() in jobs.h to the

version in bash 4.3.30:

  set_signal_handler (SIGTSTP, SIG_DFL);

  set_signal_handler (SIGTTIN, SIG_DFL);

  set_signal_handler (SIGTTOU, SIG_DFL);

or is there more to it than that?  (I'd like to try out the change myself.)

To answer my own question, I changed default_tty_job_signals()

as described in jobs.c and nojobs.c, and commented out

default_tty_job_signals() and all calls to it. It seems to work

(Ctrl-Z works when I run the shell under rxvt).

--

Keith Thompson <Keith.S.Thompson@gmail.com>