From f7ca6d1fa1a536caaff8b6ac19670bb517df416c Mon Sep 17 00:00:00 2001
From: =?utf8?q?Martin=20Mare=C5=A1?= <mj@ucw.cz>
Date: Fri, 21 Nov 2025 22:06:41 +0100
Subject: [PATCH] show-switch: Better error handling

---
 show-switch | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/show-switch b/show-switch
index 9dab19c..1079000 100755
--- a/show-switch
+++ b/show-switch
@@ -155,7 +155,12 @@ my $port_table = my_get_table({
 print "# Switch ports:\n", Dumper($port_table) if $debug;
 
 for my $port (keys %$port_table) {
-	my $if = $if_table->{$port_table->{$port}->{ifindex}} or die "Port table refers to unknown iface";
+	my $ifi = $port_table->{$port}->{ifindex};
+	my $if = $if_table->{$ifi};
+	if (!$if) {
+		print STDERR "WARNING: Port $port refers to unknown ifindex $ifi\n";
+		next;
+	}
 	$if->{switch_port} = $port;
 }
 
-- 
2.47.3