csplit(1): Fix extraneous output in edge case

When the input to csplit contains fewer lines than the number of matches
specified, extra output was mistakenly included in some output files.
From FreeBSD via Tim Chase.

diff --git a/usr.bin/csplit/csplit.c b/usr.bin/csplit/csplit.c
index e32c044..45b0e77 100644 (file)
--- a/usr.bin/csplit/csplit.c
+++ b/usr.bin/csplit/csplit.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: csplit.c,v 1.9 2016/10/28 07:22:59 schwarze Exp $     */
+/*     $OpenBSD: csplit.c,v 1.10 2021/07/08 00:38:42 millert Exp $     */
 /*     $FreeBSD: src/usr.bin/csplit/csplit.c,v 1.9 2004/03/22 11:15:03 tjr Exp $       */
 
 /*-
@@ -398,8 +398,10 @@ do_rexp(const char *expr)
                first = 0;
        }
 
-       if (p == NULL)
+       if (p == NULL) {
+               toomuch(NULL, 0);
                errx(1, "%s: no match", re);
+       }
 
        if (ofs <= 0) {
                /*