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/*

 *  chroot() -  Change Root Directory

 *  Author: fernando.ruiz@ctv.es

 *

 *  COPYRIGHT (c) 1989-1999.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 *  chroot.c,v 1.4 2002/01/04 18:29:36 joel Exp

 */

#if HAVE_CONFIG_H

#include "config.h"

#endif

#include <rtems.h>

#include <unistd.h>

#include <errno.h>

#include <rtems/libio_.h>

#include <rtems/seterr.h>

int chroot(

  const char *pathname

)

{

  int                               result;

  rtems_filesystem_location_info_t  loc;

  /* an automatic call to new private env the first time */

  if (rtems_current_user_env == &rtems_global_user_env) {

   rtems_libio_set_private_env(); /* try to set a new private env*/

   if (rtems_current_user_env == &rtems_global_user_env) /* not ok */

    rtems_set_errno_and_return_minus_one( ENOTSUP );

  };

  loc = rtems_filesystem_root;     /* save the value */

  result = chdir(pathname);

  if (result) {

    rtems_filesystem_root = loc; /* restore the value */

    rtems_set_errno_and_return_minus_one( errno );

  };

  rtems_filesystem_root = rtems_filesystem_current;

  return 0;

}