From a4de4eb53951718b260fa79ae3535db795e1e6ef Mon Sep 17 00:00:00 2001
From: sin <sin@2f30.org>
Date: Wed, 14 Aug 2013 14:38:56 +0100
Subject: [PATCH] Add pivot_root(8)

---
 Makefile     |  1 +
 pivot_root.c | 28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 pivot_root.c

diff --git a/Makefile b/Makefile
index d30db0c..9bba950 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@ SRC = \
 	lsmod.c             \
 	mkswap.c            \
 	mount.c             \
+	pivot_root.c        \
 	reboot.c            \
 	rmmod.c             \
 	stat.c              \
diff --git a/pivot_root.c b/pivot_root.c
new file mode 100644
index 0000000..9c0746d
--- /dev/null
+++ b/pivot_root.c
@@ -0,0 +1,28 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/syscall.h>
+#include <unistd.h>
+#include <stdio.h>
+#include "util.h"
+
+static void
+usage(void)
+{
+	eprintf("usage: %s new-root put-old\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	ARGBEGIN {
+	default:
+		usage();
+	} ARGEND;
+
+	if (argc < 2)
+		usage();
+
+	if (syscall(SYS_pivot_root, argv[0], argv[1]) < 0)
+		eprintf("pivot_root:");
+
+	return 0;
+}