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Hyprland exposes 2 UNIX Sockets, for controlling / getting info about Hyprland via code / bash utilities.

Hyprland Instance Signature (HIS)

echo $HYPRLAND_INSTANCE_SIGNATURE

/tmp/hypr/[HIS]/.socket.sock

Used for hyprctl-like requests. See the Hyprctl page for commands.

basically, write command args.

/tmp/hypr/[HIS]/.socket2.sock

Used for events. Hyprland will write to each connected client live events like this:

EVENT>>DATA\n (\n is a linebreak)

e.g.: workspace>>2

Events list:

name	description	data
workspace	emitted on workspace change. Is emitted ONLY when a user requests a workspace change, and is not emitted on mouse movements (see `activemon`)	`WORKSPACENAME`
focusedmon	emitted on the active monitor being changed.	`MONNAME,WORKSPACENAME`
activewindow	emitted on the active window being changed.	`WINDOWCLASS,WINDOWTITLE`
fullscreen	emitted when a fullscreen status of a window changes.	`0/1` (exit fullscreen / enter fullscreen)
monitorremoved	emitted when a monitor is removed (disconnected)	`MONITORNAME`
monitoradded	emitted when a monitor is added (connected)	`MONITORNAME`
createworkspace	emitted when a workspace is created	`WORKSPACENAME`
destroyworkspace	emitted when a workspace is destroyed	`WORKSPACENAME`
moveworkspace	emitted when a workspace is moved to a different monitor	`WORKSPACENAME,MONNAME`
activelayout	emitted on a layout change of the active keyboard	`KEYBOARDNAME,LAYOUTNAME`
openwindow	emitted when a window is opened	`WINDOWADDRESS`,`WORKSPACENAME`,`WINDOWCLASS`,`WINDOWTITLE`
closewindow	emitted when a window is closed	`WINDOWADDRESS`
movewindow	emitted when a window is moved to a workspace	`WINDOWADDRESS`,`WORKSPACENAME`
submap	emitted when a keybind submap changes. Empty means default.	`SUBMAPNAME`

{{< hint type=warning >}} A fullscreen event is not guaranteed to fire on/off once in succession. A window might do for example 3 requests to be fullscreen'd, which would result in 3 fullscreen events. {{< /hint >}}

How to use socket2 with bash

example script using socket2 events with bash and socat:

#!/bin/sh

function handle {
  if [[ ${1:0:12} == "monitoradded" ]]; then
    # do_something
  fi
}

socat - UNIX-CONNECT:/tmp/hypr/$(echo $HYPRLAND_INSTANCE_SIGNATURE)/.socket2.sock | while read line; do handle $line; done

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