From 07c6005fad29a85f2f153d4a0806e84527fba728 Mon Sep 17 00:00:00 2001
From: Michael R Sweet <msweet@msweet.org>
Date: Sun, 11 Jan 2026 14:33:19 -0500
Subject: [PATCH] Add some guards to make sure you don't accidentally overwrite
 existing PDF files with testpdfio...

---
 testpdfio.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/testpdfio.c b/testpdfio.c
index af660f9..b5bba79 100644
--- a/testpdfio.c
+++ b/testpdfio.c
@@ -507,10 +507,15 @@ do_test_file(const char *filename,	// I - PDF filename
     }
     else
     {
-      testEnd(true);
-
       if (outfile)
       {
+        if (!access(outfile, 0))
+        {
+          testEndMessage(false, "output file already exists");
+          pdfioFileClose(pdf);
+	  return (1);
+        }
+
         // Copy pages to the output file...
         if ((outpdf = pdfioFileCreate(outfile, pdfioFileGetVersion(pdf), /*media_box*/NULL, /*crop_box*/NULL, (pdfio_error_cb_t)error_cb, &error)) != NULL)
         {
@@ -524,6 +529,7 @@ do_test_file(const char *filename,	// I - PDF filename
           }
 
           pdfioFileClose(outpdf);
+          testEnd(true);
         }
       }
       else
@@ -532,7 +538,7 @@ do_test_file(const char *filename,	// I - PDF filename
 	num_objs  = pdfioFileGetNumObjs(pdf);
 	num_pages = pdfioFileGetNumPages(pdf);
 
-	printf("    PDF %s, %d pages, %d objects.\n", pdfioFileGetVersion(pdf), (int)num_pages, (int)num_objs);
+	testEndMessage(true, "PDF %s, %d pages, %d objects", pdfioFileGetVersion(pdf), (int)num_pages, (int)num_objs);
 
 	if (verbose)
 	{