From 87ad3d52c3d06311e0fdd87dc654408ee746c45c Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Sun, 22 Sep 2013 15:07:10 -0400
Subject: Exit on failure to open files.

---
diff --git a/src/ssic.pl b/src/ssic.pl
index 80e2071..553f83d 100644
--- a/src/ssic.pl
+++ b/src/ssic.pl
@@ -112,8 +112,12 @@ sub compile
 		error(4, "Input and output files are equal\n");
 	}
 
-	open($input_fh, "<", $input);
-	open($output_fh, ">", $output);
+	if (not open($input_fh, "<", $input)) {
+		error(4, "%s: %s\n", $input, $!);
+	}
+	if (not open($output_fh, ">", $output)) {
+		error(4, "%s: %s\n", $output, $!);
+	}
 
 	%ENV = (
 		"DOCUMENT_NAME" => $input,
--
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