Replace a ibuf_reserve() dance to add a NUL byte with ibuf_add_zero(buf, 1).

Same thing but far less nasty.
OK tb@

diff --git a/usr.sbin/relayd/check_tcp.c b/usr.sbin/relayd/check_tcp.c
index 6ab6952..0960203 100644 (file)
--- a/usr.sbin/relayd/check_tcp.c
+++ b/usr.sbin/relayd/check_tcp.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: check_tcp.c,v 1.58 2021/09/18 19:44:46 claudio Exp $  */
+/*     $OpenBSD: check_tcp.c,v 1.59 2023/06/20 09:54:57 claudio Exp $  */
 
 /*
  * Copyright (c) 2006 Pierre-Yves Ritschard <pyr@openbsd.org>
@@ -344,17 +344,14 @@ check_http_code(struct ctl_tcp_event *cte)
        char            *head;
        char             scode[4];
        const char      *estr;
-       u_char          *b;
        int              code;
        struct host     *host;
 
        /*
         * ensure string is nul-terminated.
         */
-       b = ibuf_reserve(cte->buf, 1);
-       if (b == NULL)
+       if (ibuf_add_zero(cte->buf, 1) == -1)
                fatal("out of memory");
-       *b = '\0';
 
        head = cte->buf->buf;
        host = cte->host;
@@ -398,17 +395,14 @@ int
 check_http_digest(struct ctl_tcp_event *cte)
 {
        char            *head;
-       u_char          *b;
        char             digest[SHA1_DIGEST_STRING_LENGTH];
        struct host     *host;
 
        /*
         * ensure string is nul-terminated.
         */
-       b = ibuf_reserve(cte->buf, 1);
-       if (b == NULL)
+       if (ibuf_add_zero(cte->buf, 1) == -1)
                fatal("out of memory");
-       *b = '\0';
 
        head = cte->buf->buf;
        host = cte->host;