From 465b9b55351dd5c2d3569943b3c266dbdf65bbe5 Mon Sep 17 00:00:00 2001
From: Ian Young <ian@iay.org.uk>
Date: Wed, 30 Jan 2013 17:07:41 +0000
Subject: [PATCH] Complain in a slightly more helpful way if we can't open a
 file.

---
 build/check_certificate.pl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/build/check_certificate.pl b/build/check_certificate.pl
index eab84b2d..e59e3b2f 100755
--- a/build/check_certificate.pl
+++ b/build/check_certificate.pl
@@ -15,7 +15,7 @@
 
 while (@ARGV) {
 	$fn = shift @ARGV;
-	open(IN, $fn);
+	open(IN, $fn) || die "could not open $fn: $!";
 	print PIPE "Entity: $fn keyname (none)\n";
 	while (<IN>) {
 		print PIPE $_;
@@ -23,4 +23,4 @@
 	close IN;
 }
 
-close PIPE;
\ No newline at end of file
+close PIPE;