From ed1b9eb881714d81d85f14afa35f51254e80d5b6 Mon Sep 17 00:00:00 2001
From: miko <miko@openbsd.org>
Date: Fri, 7 Sep 2018 07:35:30 +0000
Subject: replace malloc()+strlcpy() with strndup() in cmdline_symset().

"looks good" gilles@ halex@
---
 usr.sbin/acme-client/parse.y | 13 ++++---------
 usr.sbin/bgpd/parse.y        | 13 ++++---------
 usr.sbin/dvmrpd/parse.y      | 13 ++++---------
 usr.sbin/eigrpd/parse.y      | 13 ++++---------
 usr.sbin/httpd/parse.y       | 13 ++++---------
 usr.sbin/ifstated/parse.y    | 11 +++--------
 usr.sbin/iscsictl/parse.y    | 13 ++++---------
 usr.sbin/ldapd/parse.y       | 13 ++++---------
 usr.sbin/ldpd/parse.y        | 13 ++++---------
 usr.sbin/lpd/parse.y         | 13 ++++---------
 usr.sbin/ospf6d/parse.y      | 13 ++++---------
 usr.sbin/ospfd/parse.y       | 13 ++++---------
 usr.sbin/rad/parse.y         | 13 ++++---------
 usr.sbin/relayd/parse.y      | 13 ++++---------
 usr.sbin/ripd/parse.y        | 13 ++++---------
 usr.sbin/smtpd/parse.y       | 13 ++++---------
 usr.sbin/snmpd/parse.y       | 13 ++++---------
 usr.sbin/switchd/parse.y     | 13 ++++---------
 usr.sbin/vmd/parse.y         | 13 ++++---------
 usr.sbin/ypldap/parse.y      | 13 ++++---------
 20 files changed, 79 insertions(+), 179 deletions(-)

diff --git a/usr.sbin/acme-client/parse.y b/usr.sbin/acme-client/parse.y
index a6ecdda6fe3..bcc8325506a 100644
--- a/usr.sbin/acme-client/parse.y
+++ b/usr.sbin/acme-client/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.29 2018/08/03 17:57:21 benno Exp $ */
+/*	$OpenBSD: parse.y,v 1.30 2018/09/07 07:35:30 miko Exp $ */
 
 /*
  * Copyright (c) 2016 Kristaps Dzonsons <kristaps@bsd.lv>
@@ -839,17 +839,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return -1;
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(EXIT_FAILURE, "cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(EXIT_FAILURE, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/bgpd/parse.y b/usr.sbin/bgpd/parse.y
index 3554d6cada5..0778e2ebf5d 100644
--- a/usr.sbin/bgpd/parse.y
+++ b/usr.sbin/bgpd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.334 2018/09/07 05:43:33 claudio Exp $ */
+/*	$OpenBSD: parse.y,v 1.335 2018/09/07 07:35:30 miko Exp $ */
 
 /*
  * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -3213,17 +3213,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		fatal("cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		fatal("%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/dvmrpd/parse.y b/usr.sbin/dvmrpd/parse.y
index 4cde820bf4b..65966206072 100644
--- a/usr.sbin/dvmrpd/parse.y
+++ b/usr.sbin/dvmrpd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.36 2018/07/11 07:39:22 krw Exp $ */
+/*	$OpenBSD: parse.y,v 1.37 2018/09/07 07:35:30 miko Exp $ */
 
 /*
  * Copyright (c) 2004, 2005, 2006 Esben Norby <norby@openbsd.org>
@@ -834,17 +834,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/eigrpd/parse.y b/usr.sbin/eigrpd/parse.y
index eedb3a7e162..1bb69f092c5 100644
--- a/usr.sbin/eigrpd/parse.y
+++ b/usr.sbin/eigrpd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.27 2018/07/11 07:39:22 krw Exp $ */
+/*	$OpenBSD: parse.y,v 1.28 2018/09/07 07:35:30 miko Exp $ */
 
 /*
  * Copyright (c) 2015 Renato Westphal <renato@openbsd.org>
@@ -1094,17 +1094,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/httpd/parse.y b/usr.sbin/httpd/parse.y
index 962af87ffc2..4851182f5cd 100644
--- a/usr.sbin/httpd/parse.y
+++ b/usr.sbin/httpd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.105 2018/07/11 07:39:22 krw Exp $	*/
+/*	$OpenBSD: parse.y,v 1.106 2018/09/07 07:35:30 miko Exp $	*/
 
 /*
  * Copyright (c) 2007 - 2015 Reyk Floeter <reyk@openbsd.org>
@@ -1819,17 +1819,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	(void)strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/ifstated/parse.y b/usr.sbin/ifstated/parse.y
index 93feda6fddb..11577a6ca11 100644
--- a/usr.sbin/ifstated/parse.y
+++ b/usr.sbin/ifstated/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.52 2018/07/11 07:39:22 krw Exp $	*/
+/*	$OpenBSD: parse.y,v 1.53 2018/09/07 07:35:31 miko Exp $	*/
 
 /*
  * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
@@ -871,17 +871,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
+	sym = strndup(s, val - s);
+	if (sym == NULL)
 		err(1, "%s", __func__);
-
-	strlcpy(sym, s, len);
-
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/iscsictl/parse.y b/usr.sbin/iscsictl/parse.y
index 12262e8ee0e..e86657fa633 100644
--- a/usr.sbin/iscsictl/parse.y
+++ b/usr.sbin/iscsictl/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.15 2018/07/11 07:39:22 krw Exp $ */
+/*	$OpenBSD: parse.y,v 1.16 2018/09/07 07:35:31 miko Exp $ */
 
 /*
  * Copyright (c) 2010 David Gwynne <dlg@openbsd.org>
@@ -739,17 +739,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/ldapd/parse.y b/usr.sbin/ldapd/parse.y
index c0082ce3ee9..e33fea03a39 100644
--- a/usr.sbin/ldapd/parse.y
+++ b/usr.sbin/ldapd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.32 2018/07/11 07:39:22 krw Exp $ */
+/*	$OpenBSD: parse.y,v 1.33 2018/09/07 07:35:31 miko Exp $ */
 
 /*
  * Copyright (c) 2009, 2010 Martin Hedenfalk <martinh@openbsd.org>
@@ -911,17 +911,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		fatal("cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		fatal("%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/ldpd/parse.y b/usr.sbin/ldpd/parse.y
index cc70041d4d9..5197bb0c368 100644
--- a/usr.sbin/ldpd/parse.y
+++ b/usr.sbin/ldpd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.65 2018/07/11 07:39:22 krw Exp $ */
+/*	$OpenBSD: parse.y,v 1.66 2018/09/07 07:35:31 miko Exp $ */
 
 /*
  * Copyright (c) 2013, 2015, 2016 Renato Westphal <renato@openbsd.org>
@@ -1317,17 +1317,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/lpd/parse.y b/usr.sbin/lpd/parse.y
index eae721cf2ab..324076cb4d3 100644
--- a/usr.sbin/lpd/parse.y
+++ b/usr.sbin/lpd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.3 2018/07/11 07:39:22 krw Exp $	*/
+/*	$OpenBSD: parse.y,v 1.4 2018/09/07 07:35:31 miko Exp $	*/
 
 /*
  * Copyright (c) 2008 Gilles Chehade <gilles@poolp.org>
@@ -682,17 +682,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "%s", __func__);
-
-	(void)strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/ospf6d/parse.y b/usr.sbin/ospf6d/parse.y
index 2b2476d0606..6b5ff9591a3 100644
--- a/usr.sbin/ospf6d/parse.y
+++ b/usr.sbin/ospf6d/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.38 2018/07/12 13:45:03 remi Exp $ */
+/*	$OpenBSD: parse.y,v 1.39 2018/09/07 07:35:31 miko Exp $ */
 
 /*
  * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
@@ -1095,17 +1095,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/ospfd/parse.y b/usr.sbin/ospfd/parse.y
index 2333711c1e1..439ce8c831b 100644
--- a/usr.sbin/ospfd/parse.y
+++ b/usr.sbin/ospfd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.91 2018/07/11 07:39:22 krw Exp $ */
+/*	$OpenBSD: parse.y,v 1.92 2018/09/07 07:35:31 miko Exp $ */
 
 /*
  * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
@@ -1294,17 +1294,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/rad/parse.y b/usr.sbin/rad/parse.y
index 45947eed6f8..87acb6f3175 100644
--- a/usr.sbin/rad/parse.y
+++ b/usr.sbin/rad/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.8 2018/08/03 13:14:46 florian Exp $	*/
+/*	$OpenBSD: parse.y,v 1.9 2018/09/07 07:35:31 miko Exp $	*/
 
 /*
  * Copyright (c) 2018 Florian Obser <florian@openbsd.org>
@@ -914,17 +914,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/relayd/parse.y b/usr.sbin/relayd/parse.y
index 2af04c27bd9..c3fa2aef4dd 100644
--- a/usr.sbin/relayd/parse.y
+++ b/usr.sbin/relayd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.227 2018/08/06 17:31:31 benno Exp $	*/
+/*	$OpenBSD: parse.y,v 1.228 2018/09/07 07:35:31 miko Exp $	*/
 
 /*
  * Copyright (c) 2007 - 2014 Reyk Floeter <reyk@openbsd.org>
@@ -2902,17 +2902,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	(void)strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/ripd/parse.y b/usr.sbin/ripd/parse.y
index a67f9aa1cc0..be6e1ede45c 100644
--- a/usr.sbin/ripd/parse.y
+++ b/usr.sbin/ripd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.41 2018/07/11 07:39:22 krw Exp $ */
+/*	$OpenBSD: parse.y,v 1.42 2018/09/07 07:35:31 miko Exp $ */
 
 /*
  * Copyright (c) 2006 Michele Marchetto <mydecay@openbeer.it>
@@ -850,17 +850,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/smtpd/parse.y b/usr.sbin/smtpd/parse.y
index 3e6bcd7d5d8..d80fd6e9590 100644
--- a/usr.sbin/smtpd/parse.y
+++ b/usr.sbin/smtpd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.220 2018/09/05 08:47:34 gilles Exp $	*/
+/*	$OpenBSD: parse.y,v 1.221 2018/09/07 07:35:31 miko Exp $	*/
 
 /*
  * Copyright (c) 2008 Gilles Chehade <gilles@poolp.org>
@@ -2124,17 +2124,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	(void)strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/snmpd/parse.y b/usr.sbin/snmpd/parse.y
index f4ac69a1701..f9a878b7828 100644
--- a/usr.sbin/snmpd/parse.y
+++ b/usr.sbin/snmpd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.51 2018/07/11 07:39:22 krw Exp $	*/
+/*	$OpenBSD: parse.y,v 1.52 2018/09/07 07:35:31 miko Exp $	*/
 
 /*
  * Copyright (c) 2007, 2008, 2012 Reyk Floeter <reyk@openbsd.org>
@@ -1127,17 +1127,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "cmdline_symset: malloc");
-
-	(void)strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/switchd/parse.y b/usr.sbin/switchd/parse.y
index 81ab0dafd81..191e720e3a7 100644
--- a/usr.sbin/switchd/parse.y
+++ b/usr.sbin/switchd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.10 2018/07/11 07:39:22 krw Exp $	*/
+/*	$OpenBSD: parse.y,v 1.11 2018/09/07 07:35:31 miko Exp $	*/
 
 /*
  * Copyright (c) 2007-2016 Reyk Floeter <reyk@openbsd.org>
@@ -705,17 +705,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = (val - s) + 1;
-	if ((sym = malloc(len)) == NULL)
-		fatal("cmdline_symset: malloc");
-
-	(void)strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		fatal("%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/vmd/parse.y b/usr.sbin/vmd/parse.y
index 2b159d9b866..13cb3e3ce3f 100644
--- a/usr.sbin/vmd/parse.y
+++ b/usr.sbin/vmd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.42 2018/07/13 08:42:49 reyk Exp $	*/
+/*	$OpenBSD: parse.y,v 1.43 2018/09/07 07:35:31 miko Exp $	*/
 
 /*
  * Copyright (c) 2007-2016 Reyk Floeter <reyk@openbsd.org>
@@ -1154,17 +1154,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = (val - s) + 1;
-	if ((sym = malloc(len)) == NULL)
-		fatal("cmdline_symset: malloc");
-
-	(void)strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		fatal("%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
diff --git a/usr.sbin/ypldap/parse.y b/usr.sbin/ypldap/parse.y
index c55e8ab876b..6048a3586c9 100644
--- a/usr.sbin/ypldap/parse.y
+++ b/usr.sbin/ypldap/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.28 2018/07/11 07:39:22 krw Exp $	*/
+/*	$OpenBSD: parse.y,v 1.29 2018/09/07 07:35:31 miko Exp $	*/
 
 /*
  * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org>
@@ -930,17 +930,12 @@ cmdline_symset(char *s)
 {
 	char	*sym, *val;
 	int	ret;
-	size_t	len;
 
 	if ((val = strrchr(s, '=')) == NULL)
 		return (-1);
-
-	len = strlen(s) - strlen(val) + 1;
-	if ((sym = malloc(len)) == NULL)
-		errx(1, "%s", __func__);
-
-	(void)strlcpy(sym, s, len);
-
+	sym = strndup(s, val - s);
+	if (sym == NULL)
+		errx(1, "%s: strndup", __func__);
 	ret = symset(sym, val + 1, 1);
 	free(sym);
 
-- 
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