libmisc/shell/main_chroot.c

0001 /**
0002  * @file
0003  *
0004  * @brief CHROOT Shell Command Implmentation
0005  */
0006
0007 /*
0008  * Copyright (c) 2001 Fernando Ruiz Casas <fruizcasas@gmail.com>
0009  *
0010  *  The license and distribution terms for this file may be
0011  *  found in the file LICENSE in this distribution or at
0012  *  http://www.rtems.org/license/LICENSE.
0013  */
0014
0015 #ifdef HAVE_CONFIG_H
0016 #include "config.h"
0017 #endif
0018
0019 #include <stdio.h>
0020 #include <unistd.h>
0021 #include <string.h>
0022 #include <errno.h>
0023
0024 #include <rtems.h>
0025 #include <rtems/shell.h>
0026 #include "internal.h"
0027
0028 static int rtems_shell_main_chroot(
0029   int argc,
0030   char * argv[]
0031 )
0032 {
0033   char *new_root = "/";
0034
0035   if (argc == 2)
0036      new_root = argv[1];
0037
0038   if ( chroot(new_root) < 0 ) {
0039     fprintf(stderr,"chroot %s (%s)\n", new_root, strerror(errno));
0040     return -1;
0041   }
0042
0043   return 0;
0044 }
0045
0046 rtems_shell_cmd_t rtems_shell_CHROOT_Command = {
0047   "chroot",                                     /* name */
0048   "chroot [dir] # change the root directory",   /* usage */
0049   "files",                                      /* topic */
0050   rtems_shell_main_chroot,                      /* command */
0051   NULL,                                         /* alias */
0052   NULL                                          /* next */
0053 };