From 390b4959bdb91b9a86ba9d5a9a789569053e4dd1 Mon Sep 17 00:00:00 2001
From: codefiles <11915375+codefiles@users.noreply.github.com>
Date: Fri, 27 Feb 2026 19:20:02 -0500
Subject: [PATCH] Refactor ISO check (#4264)

---
 archinstall/lib/locale/utils.py |  4 ++--
 archinstall/lib/utils/util.py   | 11 +++++------
 archinstall/main.py             |  9 ++++-----
 3 files changed, 11 insertions(+), 13 deletions(-)

diff --git a/archinstall/lib/locale/utils.py b/archinstall/lib/locale/utils.py
index f301aebc..e7229160 100644
--- a/archinstall/lib/locale/utils.py
+++ b/archinstall/lib/locale/utils.py
@@ -1,7 +1,7 @@
 from archinstall.lib.command import SysCommand
 from archinstall.lib.exceptions import ServiceException, SysCallError
 from archinstall.lib.output import error
-from archinstall.lib.utils.util import running_from_host
+from archinstall.lib.utils.util import running_from_iso
 
 
 def list_keyboard_languages() -> list[str]:
@@ -80,7 +80,7 @@ def get_kb_layout() -> str:
 
 
 def set_kb_layout(locale: str) -> bool:
-	if running_from_host():
+	if not running_from_iso():
 		# Skip when running from host - no need to change host keymap
 		# The target installation keymap is set via installer.set_keyboard_language()
 		return True
diff --git a/archinstall/lib/utils/util.py b/archinstall/lib/utils/util.py
index cda1731a..d75bcaa7 100644
--- a/archinstall/lib/utils/util.py
+++ b/archinstall/lib/utils/util.py
@@ -5,15 +5,14 @@ from pathlib import Path
 from archinstall.lib.output import FormattedOutput
 
 
-def running_from_host() -> bool:
+def running_from_iso() -> bool:
 	"""
-	Check if running from an installed system.
+	Check if running from the archiso environment.
 
-	Returns True if running from installed system (host mode) for host-to-target install.
-	Returns False if /run/archiso exists (ISO mode).
+	Returns True if /run/archiso/airootfs is a mount point (ISO mode).
+	Returns False if running from installed system (host mode) for host-to-target install.
 	"""
-	is_host = not Path('/run/archiso').exists()
-	return is_host
+	return Path('/run/archiso/airootfs').is_mount()
 
 
 def generate_password(length: int = 64) -> str:
diff --git a/archinstall/main.py b/archinstall/main.py
index 07e19f30..b82c6fa3 100644
--- a/archinstall/main.py
+++ b/archinstall/main.py
@@ -17,7 +17,7 @@ from archinstall.lib.output import debug, error, info, warn
 from archinstall.lib.packages.util import check_version_upgrade
 from archinstall.lib.pacman.pacman import Pacman
 from archinstall.lib.translationhandler import tr
-from archinstall.lib.utils.util import running_from_host
+from archinstall.lib.utils.util import running_from_iso
 
 
 def _log_sys_info() -> None:
@@ -114,11 +114,10 @@ def run() -> int:
 				info(text)
 				time.sleep(3)
 
-	if running_from_host():
-		# log which mode we are using
-		debug('Running from Host (H2T Mode)...')
-	else:
+	if running_from_iso():
 		debug('Running from ISO (Live Mode)...')
+	else:
+		debug('Running from Host (H2T Mode)...')
 
 	mod_name = f'archinstall.scripts.{script}'
 	# by loading the module we'll automatically run the script