upstream: If write() returned short, the subsequent write would restart

from the beginning of the buffer not the end of what was written.  Fix, since
we want modpipe to corrupt data for testing purposes deliberately not
accidentally.  ok djm@

OpenBSD-Regress-ID: 50ca74d287445c58944f070bb92dc13b1d054b43

diff --git a/regress/modpipe.c b/regress/modpipe.c
index 5f4824b51d024df7d31da0f51fcf9799dee887e6..5ef2f12ed1f64a9cbec1525693de9bf22a313354 100644 (file)
--- a/regress/modpipe.c
+++ b/regress/modpipe.c
@@ -14,7 +14,7 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $OpenBSD: modpipe.c,v 1.6 2013/11/21 03:16:47 djm Exp $ */
+/* $OpenBSD: modpipe.c,v 1.7 2025/10/03 01:03:45 dtucker Exp $ */
 
 #include "includes.h"
 
@@ -127,7 +127,7 @@ main(int argc, char **argv)
                        }
                }
                for (o = 0; o < s; o += r) {
-                       r = write(STDOUT_FILENO, buf, s - o);
+                       r = write(STDOUT_FILENO, buf + o, s - o);
                        if (r == 0)
                                break;
                        if (r < 0) {