X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/337b4e616e8f53ba06285b1645e1df9918ed5c16..33619bd9279b5496584a85c0be928c6165a998a1:/uip/mhfixmsg.c

diff --git a/uip/mhfixmsg.c b/uip/mhfixmsg.c
index 3180e9ce..4d5083c6 100644
--- a/uip/mhfixmsg.c
+++ b/uip/mhfixmsg.c
@@ -675,7 +675,9 @@ replace_boundary (CT ct, char *file, char *boundary) {
         case BODY:
             fputs ("\n", fpout);
             /* buf will have a terminating NULL, skip it. */
-            fwrite (buf, 1, bufsz-1, fpout);
+            if ((int) fwrite (buf, 1, bufsz-1, fpout) < bufsz-1) {
+                advise (file, "fwrite");
+            }
             continue;
 
         case FILEEOF: