hush/pivot_root.c

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/* vi: set sw=4 ts=4: */
/*
* pivot_root.c - Change root file system. Based on util-linux 2.10s
*
* busyboxed by Evin Robertson
*/
#include <stdlib.h>
#include <stdio.h>
#include <sys/syscall.h>
#include <linux/unistd.h>
#include "busybox.h"
#ifndef __NR_pivot_root
#warning This kernel does not support the pivot_root syscall
#warning The pivot_root application is being stubbed out...
int pivot_root_main(int argc, char **argv)
{
printf("Please recompile with a kernel supporting the pivot_root syscall.\n");
return 0;
}
#else
static _syscall2(int,pivot_root,const char *,new_root,const char *,put_old)
int pivot_root_main(int argc, char **argv)
{
if (argc != 3)
show_usage();
if (pivot_root(argv[1],argv[2]) < 0)
perror_msg_and_die("pivot_root");
return EXIT_SUCCESS;
}
#endif
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/