line discipline signals broken in XTMODKEYS

[dankamongmen]

Got the latest contour building, and we're seeing some nasty problems. cli1 can only read two inputs before it ceases. notcurses-input bleeds a tremendous amount of what looks like palette replies through.

[dankamongmen]

the cli1 problem also seems to be happening on XTerm.

[dankamongmen]

the cli1 problem also seems to be happening on XTerm.

and WezTerm =\

[dankamongmen]

so when we're in this state, ctrl-c prompts a "press any key, q to quit" message (as a normal key would), but doesn't exit (as it normally does). interesting.

[dankamongmen]

actually, hrmm, it seems any use of ctrl results in an event?

[dankamongmen]

oh hrmm does XTMODKEYS essentially go into linesigs disabled (raw) mode? that would definitely explain the latter issue.

[dankamongmen]

ok, the ctrl+c and friends problem is remedied

[dankamongmen]

hmmm this doesn't happen to notcurses-input, just cli1, so it's pretty clearly an instance of the inputready fd not working. maybe this is #2216, and we've just always been testing in kitty? urk.

[dankamongmen]

yeah, if i pull the poll() out of cli1, things work just fine. alright, good, it looks like we might get to #2216 now. calling this closed for handling the line discipline signals.