system
August 6, 2022, 7:05pm
1
Attention Topic was automatically imported from the old Question2Answer platform.
Asked By ynot01
I want to get, specifically, the output of OS.execute("ping", ["1.1.1.1", "-n", "1"], true, output) without blocking the main thread.
The solution, I believe, would be something to do with threading, but I am not very familiar with threads and I do not know the proper way to implement a “callback” where the result of the above command would be sent to the main thread to then be processed and the side thread killed.
system
August 7, 2022, 5:15pm
2
Reply From: Ha-kuro
Quite simple actually ~ the third argument just needs to be falseOS.execute("ping", ["1.1.1.1", "-n", "1"], false, output)
Here’s [the docs][1]
[1]: OS — Godot Engine (stable) documentation in English (%20String%20path%2C%20PoolStringArray%20arguments%2C%20bool-,blocking%3Dtrue,-%2C%20Array%20output%3D%5B%20%5D%2C%20bool%20read_stderr%3Dfalse%2C
This results in output not being set
ynot01 | 2022-08-07 17:43
Per the docs, the output param will be empty if blocking is false (which makes sense).
Have you tried piping the output of ping into a file and monitoring that file from another script?
Bernard Cloutier | 2022-08-08 12:12
Would have issues from the file being locked/actively written from the other thread
If you read the file while it’s being written to the data could be corrupted
ynot01 | 2022-08-10 21:52
system
September 4, 2022, 12:26am
3
Reply From: ynot01
For those curious, this code snippet is what helped me solve this, from “youwin”
The thread.wait_to_finish() returns the return value of the thread.
extends Node2D
var thread: Thread
func _ready() -> void:
thread = Thread.new()
thread.start(self, "_thread")
while thread.is_alive():
yield(get_tree(), "idle_frame")
print(thread.wait_to_finish())
thread = null
func _thread() -> String:
var output := []
var err: int = OS.execute("CMD.exe", ["/C", "dir"], true, output)
if err != 0:
printerr("Error occurred: %d" % err)
return PoolStringArray(output).join("\n")
