From 9e2be150b5ef71fa410b8c731c32d2722ec3d304 Mon Sep 17 00:00:00 2001
From: Jared Vititoe <jjvititoe1@gmail.com>
Date: Wed, 13 May 2026 11:12:02 -0400
Subject: [PATCH] Use grep -F in dmesg filter to prevent interface name treated
 as regex

grep {iface} treats dots and other special chars as regex metacharacters.
Switch to grep -F -- {iface} for fixed-string matching and to prevent
a leading dash in the interface name from being parsed as a grep flag.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 diagnose.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/diagnose.py b/diagnose.py
index d0879ec..e7ec513 100644
--- a/diagnose.py
+++ b/diagnose.py
@@ -68,7 +68,7 @@ class DiagnosticsRunner:
             f' echo "=== ip_route ===";'
             f' ip route show dev {q} 2>/dev/null;'
             f' echo "=== dmesg ===";'
-            f' dmesg 2>/dev/null | grep {q} | tail -50;'
+            f' dmesg 2>/dev/null | grep -F -- {q} | tail -50;'
             f' echo "=== lldpctl ===";'
             f' lldpctl 2>/dev/null || echo "lldpd not running";'
             f' echo "=== end ==="'