From 01fcffe0bdfa8df56be88900ae7508bfa651bc08 Mon Sep 17 00:00:00 2001
From: AppDevForAll <dev@appdevforall.org>
Date: Tue, 23 Jun 2026 01:57:02 +0000
Subject: [PATCH] fix(dashboard): proot-safe copy (cp -a) instead of rsync -Aax

rsync sets perms without following symlinks via lchmod = fchmodat(AT_SYMLINK_NOFOLLOW);
glibc >=2.39 (Debian trixie 2.41) services that with the fchmodat2() syscall (Linux
>=6.6). proot does not translate fchmodat2's path arg, so under proot on a 6.6+ kernel
the guest path reaches the host untranslated and chmod returns ENOENT -> rsync exits 23
-> install_iiaboa_dashboard aborts (set -e) -> rootfs lacks flag_install_ready and the
dashboard never starts. Reproduced building the rootfs off-device on a Raspberry Pi 5
(kernel 6.8) for BOTH armeabi-v7a and arm64-v8a; it worked on kernel 6.1 hosts and in
the APK -> host-kernel-dependent, not arch-specific. cp uses plain chmod (old fchmodat),
which proot translates, so the copy is reliable.

Device-to-device sync is unaffected: its rsync is the static librsync.so built with
lchmod disabled (ac_cv_func_lchmod=no), so it never calls fchmodat2.
---
 iiab-android | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/iiab-android b/iiab-android
index ff3b342..f2a334e 100644
--- a/iiab-android
+++ b/iiab-android
@@ -414,7 +414,9 @@ install_iiaboa_dashboard() {
 
   # Copy dashboard files
   mkdir -p "$dash_dest"
-  rsync -Aax "${dash_src}/" "$dash_dest/"
+  # Proot-safe copy: rsync's lchmod -> fchmodat2 (glibc>=2.39, kernel>=6.6) isn't
+  # translated by proot (rc=23 under proot on 6.6+ kernels); cp -a is reliable.
+  cp -a "${dash_src}/." "$dash_dest/"
 
   # Install node dependencies
   log "Installing Node dependencies for the dashboard..."