Virtual machine monitor programs like QEMU[1] and cloud-hypervisor[2] support creating ptys which are hooked up to the VM's console. In the case of cloud-hypervisor, this even supports resizing, where resize events on the pty will be propagated to the guest VM.
But when attaching to one of these ptys with screen, like `screen /dev/pts/1`, screen wouldn't inform the pty of its output size. We fix this by removing the pid check. Also, we need to remove the 0 checks for the previous width and height, or screen won't resize the pty when it first attaches, only on subsequent resizes. [1]: https://www.qemu.org/ [2]: https://github.com/cloud-hypervisor/cloud-hypervisor --- src/resize.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/src/resize.c b/src/resize.c index 070d3ed..686e02d 100644 --- a/resize.c +++ b/resize.c @@ -983,8 +983,7 @@ int wi, he, hi; /* signal new size to window */ #ifdef TIOCSWINSZ - if (wi && (p->w_width != wi || p->w_height != he) - && p->w_width != 0 && p->w_height != 0 && p->w_ptyfd >= 0 && p->w_pid) + if (wi && (p->w_width != wi || p->w_height != he) && p->w_ptyfd >= 0) { glwz.ws_col = wi; glwz.ws_row = he; -- 2.32.0
