Re: [Nano-devel] [PATCH] winio: fix initial state of blocking-io

[Lion Yang]

Here's a test program:

    #include <sys/ioctl.h>

    int main() {

      int set = 1;

      ioctl(0, FIONBIO, &set);

    }

After running this, `nano` fails with "Too many errors from stdin".

The same thing happens on `cat`: "Resource temporarily unavailable".

2017/11/04 午後11:16 Lion Yang <address@hidden>:

winio.c assumes waiting_mode = TRUE but stdin can be non-blocking

when a program (before nano) turned stdin to non-blocking mode and did not

recover it (or crashed before recovering blocking mode). This commit

set stdin blocking mode in nano.c

This should fix the bug reported in

"[Help-nano] Too many errors from stdin"

from Roman Tereshkov.

That was because nano treat the stdin as blocking (`static bool waiting_mode = TRUE`),).

Nano tried to do `input = wgetch(win)`, but obviously it always returns ERR in non-blocking mode,

and the branch `if (input == ERR && !waiting_mode) ... return;` had no effect.