From 0006cc3fbf9fdd9f6af88d998ad240a91b0cdcc3 Mon Sep 17 00:00:00 2001
From: Leorize <alaviss@users.noreply.github.com>
Date: Thu, 14 Dec 2017 07:25:45 +0700
Subject: [PATCH] libs/bsd: add explicit_bzero(3)

Signed-off-by: Augustin Cavalier <waddlesplash@gmail.com>
---
 headers/compatibility/bsd/string.h |  1 +
 src/libs/bsd/Jamfile               |  1 +
 src/libs/bsd/explicit_bzero.c      | 22 ++++++++++++++++++++++
 3 files changed, 24 insertions(+)
 create mode 100644 src/libs/bsd/explicit_bzero.c

diff --git a/headers/compatibility/bsd/string.h b/headers/compatibility/bsd/string.h
index 7d194971d1..c19ea27f87 100644
--- a/headers/compatibility/bsd/string.h
+++ b/headers/compatibility/bsd/string.h
@@ -17,6 +17,7 @@ extern "C" {
 #endif
 
 char* strsep(char** string, const char* delimiters);
+void explicit_bzero(void *buf, size_t len);
 
 #ifdef __cplusplus
 }
diff --git a/src/libs/bsd/Jamfile b/src/libs/bsd/Jamfile
index 2b77ca4cd3..42f2746789 100644
--- a/src/libs/bsd/Jamfile
+++ b/src/libs/bsd/Jamfile
@@ -13,6 +13,7 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 		SharedLibrary [ MultiArchDefaultGristFiles libbsd.so ] :
 			daemon.c
 			err.c
+			explicit_bzero.c
 			fgetln.c
 			getpass.c
 			issetugid.c
diff --git a/src/libs/bsd/explicit_bzero.c b/src/libs/bsd/explicit_bzero.c
new file mode 100644
index 0000000000..359e4d41bf
--- /dev/null
+++ b/src/libs/bsd/explicit_bzero.c
@@ -0,0 +1,22 @@
+/*	$OpenBSD: explicit_bzero.c,v 1.3 2014/06/21 02:34:26 matthew Exp $ */
+/*
+ * Public domain.
+ * Written by Matthew Dempsky.
+ */
+
+#include <string.h>
+
+__attribute__((weak)) void
+__explicit_bzero_hook(void *buf, size_t len);
+
+__attribute__((weak)) void
+__explicit_bzero_hook(void *buf, size_t len)
+{
+}
+
+void
+explicit_bzero(void *buf, size_t len)
+{
+	memset(buf, 0, len);
+	__explicit_bzero_hook(buf, len);
+}