"Terminal does not support reporting screen size s via the TIOCGWINSZ ioctl"

[alok]

• nvim --version: NVIM v0.2.3-975-g84bac9f50
• Vim (version: ) behaves differently? Different error but doesn't work either
• Operating system/version: macos 10.13
• Terminal name/version: kitty
• $TERM: xterm-256color

Steps to reproduce using nvim -u NORC

Requires kitty terminal emulator and its icat script

nvim -u NORC
:term
icat (some img file)

Actual behavior

Terminal does not support reporting screen sizes via the TIOCGWINSZ ioctl

Expected behavior

An image should be displayed.

[justinmk]

Patch welcome

[justinmk]

@alok src/nvim/terminal.c. Will need to use libvterm's vterm_state_set_unrecognised_fallbacks, I think. @leonerd does that sound correct?

[leonerd]

No, that's unrelated. You'll need to make the ioctl(TIOCSWINSZ, ...) call somewhere in nvim source. See for reference

https://bazaar.launchpad.net/~leonerd/pangoterm/trunk/view/head:/main.c#L62

[JudgeGregg]

Apparently there's already a TIOCSWINSZ callback in:

neovim/src/nvim/os/pty_process_unix.c

Line 124 in b3ce001

void pty_process_resize(PtyProcess *ptyproc, uint16_t width, uint16_t height)

However the icat script fails because it's expecting pixel width/height in addition to columns/lines.
Furthermore, even if I set the pixel size for a given neovim term, the script fails with "terminal does not support graphics, please use kitty".

It seems to be a much bigger change than expected.

[watersb]

#include <stdio.h>
#include <string.h>
#include <sys/errno.h>
#include <sys/ioctl.h>

int main(void)
{
    struct winsize w;

    if (ioctl(1, TIOCGWINSZ, &w) < 0)
    {
        fprintf(stderr, "Couldn't get window size: %s\n", strerror(errno));
    }
    else
    {
        printf(
            "chars  w,h: %4u, %4u\npixels x,y: %4u, %4u\n",
            w.ws_row,
            w.ws_col,
            w.ws_xpixel,
            w.ws_ypixel);
    }

    return errno;
}

[alok]

@justinmk @leonerd what work would be required to implement this? I finally learned C and may actually be able to implement this now.

[alok]

I’m also willing to put out a $100 bounty on this.

[leonerd]

If you need to know the pixel size then the best you can do is just have nvim ask the real terminal and then relay that information back. Be careful of screen -x and similar, though; because there may be multiple "real terminals" with multiple real sizes. This isn't a well-defined answer.

[max397574]

any updates on this?

[justinmk]

no

[ejuarezg]

I'm running into a similar issue, I believe, when running neovim inside a container in Fedora Silverblue.