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Message-ID: <34597e29-0602-446e-82e4-049fc1f3d9a5@shaddybaddah.name>
Date: Sat, 20 Jan 2024 19:55:40 +1100
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To: cygwin AT cygwin DOT com
Subject: Cygwin/X - Query: why invoking from cmd backgrounds?
From: Shaddy Baddah via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Shaddy Baddah <lithium-cygwin AT shaddybaddah DOT name>
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Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>

Hi,

I am just wondering if anyone understands why XWin detaches/runs in
the background, when launched from Windows Command Prompt.

This being different to when run from Mintty.

Here's what happens with my Mintty invocation, which stays in the
foreground:

| $ XWin  :1 -nolisten tcp -ac -multiwindow
| Welcome to the XWin X Server
| Vendor: The Cygwin/X Project
| Release: 1.21.1.9
| OS: CYGWIN_NT-10.0-19045 pc-w10 3.4.10-1.x86_64 2023-11-29 12:12 UTC x86_64
| OS: Windows 10  [Windows NT 10.0 build 19045] x64
| Package: version 21.1.9-1 built 2023-12-10
|
| XWin was started with the following command line:
|
| XWin :1 -nolisten tcp -ac -multiwindow
|
| (II) xorg.conf is not supported
| (II) See http://x.cygwin.com/docs/faq/cygwin-x-faq.html for more information
| winUpdateDpi - primary monitor native DPI x 96 y 96
...
| winClipboardProc - xcb_connect () returned and successfully opened the display.


Here's what happens if I invoke tigervnc-server from Windows Command
Prompt, where it stays in the forgeground and I can terminate with
Ctrl-C:

| C:\Users\shaddy>C:\PublicData\sw.portapps\cygwin.x86_64\bin\Xvnc  :2 -nolisten tcp -ac -geometry 900x600 -SecurityTypes=None
|
| Xvnc TigerVNC 1.8.0 - built Dec 30 2017 22:15:31
| Copyright (C) 1999-2017 TigerVNC Team and many others (see README.txt)
| See http://www.tigervnc.org for information on TigerVNC.
| Underlying X server release 11906000, The X.Org Foundation
|
|
| Sat Jan 20 19:34:43 2024
|  vncext:      VNC extension running!
|  vncext:      Listening for VNC connections on all interface(s), port 5902
|  vncext:      created VNC server for screen 0
| MIT-SHM extension disabled due to lack of kernel support

But here's what happens when I run that first command line from
Windows Command Prompt. No output and the command returns, though the
server is running (including with an icon tray clickable):

| C:\Users\shaddy>C:\PublicData\sw.portapps\cygwin.x86_64\bin\XWin :1 -nolisten tcp -ac -multiwindow
|
| C:\Users\shaddy>

Is this special detection and handling in the main() (or whatever
entrypoint is applicable)?

--
Regards,
Shaddy


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