Re: fix for readline terminal size problems when window is resized with open pager

Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> writes:
>> I did some more experimentation and concluded that actually, this problem
>> has nothing whatsoever to do with pager invocations. What seems to really
>> be happening is that libreadline activates its SIGWINCH handler only while
>> it's being called to collect input, which is fine in itself, but *it does
>> not notice screen resizes that happen when the handler is not active*.

> I wonder if we're doing the proper things. According to their manual,
> http://git.savannah.gnu.org/gitweb/?p=readline.git;a=blob_plain;f=doc/readline.html;h=9b7dd842764c81ad496c38a2794361cad964ee90;hb=7628b745a813aac53586b640da056a975f1c443e#SEC44
> I think we should be setting rl_catch_signal and/or rl_catch_sigwinch
> and then perhaps call rl_set_signals(), but I don't think we're doing
> anything of the sort.

According to the info page I have here, those are all enabled by default,
and we would only need to do something special if we wanted to prevent
readline from catching signals.

It's possible that 6.3 has made fundamental, incompatible changes in
this area and not bothered to update the documentation, but it would be
pretty shoddy work on their part.

regards, tom lane