(Finsert_file_contents): Don't treat a return value

of 0 from emacs_read as an IO error.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/fileio.c b/src/fileio.c
index e09fac7e79b..a8edc2f75b7 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -3863,14 +3863,18 @@ actually used.")
           while (total_read < trial)
             {
               nread = emacs_read (fd, buffer + total_read, trial - total_read);
-              if (nread <= 0)
+              if (nread < 0)
                 error ("IO error reading %s: %s",
                        XSTRING (orig_filename)->data, emacs_strerror (errno));
+              else if (nread == 0)
+                break;
               total_read += nread;
             }
+          
           /* Scan this bufferful from the end, comparing with
              the Emacs buffer.  */
           bufpos = total_read;
+          
           /* Compare with same_at_start to avoid counting some buffer text
              as matching both at the file's beginning and at the end.  */
           while (bufpos > 0 && same_at_end > same_at_start