util-linux/pivot_root.c

/* vi: set sw=4 ts=4: */
/*
 * pivot_root.c - Change root file system.  Based on util-linux 2.10s
 *
 * busyboxed by Evin Robertson
 * pivot_root syscall stubbed by Erik Andersen, so it will compile
 *     regardless of the kernel being used.
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include "busybox.h"

extern int pivot_root(const char * new_root,const char * put_old);

int pivot_root_main(int argc, char **argv)
{
    if (argc != 3)
	bb_show_usage();

	if (pivot_root(argv[1],argv[2]) < 0)
		bb_perror_msg_and_die("pivot_root");

    return EXIT_SUCCESS;

}