From daf7c70ed394e5336da6a189c3eb01dbf979aaa6 Mon Sep 17 00:00:00 2001
From: Pierre Kisters <1524059+lhns@users.noreply.github.com>
Date: Thu, 1 Oct 2026 04:07:12 +0200
Subject: [PATCH] Cleanup: a Firefox profile in use is detected again with
 other users' processes running

ff_in_use piped find into grep -q; with pipefail, find's error on any
unreadable /proc/<pid>/fd (root's processes) made every profile look
unused, so cleanup could remove user.js and rewrite prefs.js under a
running Firefox. The Nix check's sandbox has no such processes.
---
 install.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/install.sh b/install.sh
index 6c5b614..2c147c4 100755
--- a/install.sh
+++ b/install.sh
@@ -713,7 +713,9 @@ clean_icons() {
 # --- Firefox user.js ---
 
 ff_keys() { sed -n 's/^[[:space:]]*user_pref(\("[^"]*"\),.*/\1/p' "$1" 2>/dev/null || true; }
-ff_in_use() { find /proc/[0-9]*/fd -lname "$1/.parentlock" -print -quit 2>/dev/null | grep -q .; }
+# Not `find | grep -q`: find fails on other users' /proc/<pid>/fd, and with
+# pipefail that would make every profile look unused.
+ff_in_use() { [[ -n $(find /proc/[0-9]*/fd -lname "$1/.parentlock" -print -quit 2>/dev/null) ]]; }
 
 clean_firefox() { # all
   local all=$1 prof name u t kind keys pats left