From cac64436b29348c0a7ef07e22703a567dc830cba Mon Sep 17 00:00:00 2001
From: David Bayer <bayer.david99@gmail.com>
Date: Sun, 12 Jan 2025 11:26:49 +0100
Subject: [PATCH] add perror to example

---
 cudax/examples/file.cu | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/cudax/examples/file.cu b/cudax/examples/file.cu
index 67ebef5651e..b419bb6e4e0 100644
--- a/cudax/examples/file.cu
+++ b/cudax/examples/file.cu
@@ -119,7 +119,12 @@ try
   printf("waiting for the stream to finish\n");
   stream.wait();
 
-  if (numBytesWritten != numBytes)
+  if (numBytes == -1)
+  {
+    perror("Error writing file: ");
+    exit(EXIT_FAILURE);
+  }
+  else if (numBytesWritten != numBytes)
   {
     fprintf(stderr, "Error: wrote %ld bytes, expected %ld\n", numBytesWritten, numBytes);
     exit(EXIT_FAILURE);