fortify/internal/app/wayland.go

package app

import (
	"fmt"
	"os"
	"path"

	"git.ophivana.moe/cat/fortify/acl"
	"git.ophivana.moe/cat/fortify/internal"
	"git.ophivana.moe/cat/fortify/internal/verbose"
)

const (
	// https://manpages.debian.org/experimental/libwayland-doc/wl_display_connect.3.en.html
	waylandDisplay = "WAYLAND_DISPLAY"
)

func (a *App) ShareWayland() {
	a.setEnablement(internal.EnableWayland)

	// ensure Wayland socket ACL (e.g. `/run/user/%d/wayland-%d`)
	if w, ok := os.LookupEnv(waylandDisplay); !ok {
		internal.Fatal("Wayland: WAYLAND_DISPLAY not set")
	} else {
		// add environment variable for new process
		wp := path.Join(a.runtimePath, w)
		a.AppendEnv(waylandDisplay, wp)
		if err := acl.UpdatePerm(wp, a.UID(), acl.Read, acl.Write, acl.Execute); err != nil {
			internal.Fatal(fmt.Sprintf("Error preparing Wayland '%s':", w), err)
		} else {
			a.exit.RegisterRevertPath(wp)
		}
		verbose.Printf("Wayland socket '%s' configured\n", w)
	}
}