source: rtems/cpukit/libcsupport/src/chroot.c @ 98b785e

4.115
Last change on this file since 98b785e was 7baa484, checked in by Chris Johns <chrisj@…>, on 06/12/09 at 01:53:33

2009-06-12 Chris Johns <chrisj@…>

  • libblock/src/bdbuf.c: Update comments.
  • libblock/src/bdpart.c, libblock/src/ide_part_table.c: Get the device from the rdev field of the stat buf.
  • libcsupport/include/rtems/libio.h: Add a path length to evalpath handler. Add parent locations to rmmod and unlink handlers.
  • libcsupport/include/rtems/libio_.h: Add a path length to rtems_filesystem_evaluate_path. Add rtems_filesystem_evaluate_relative_path, rtems_filesystem_dirname, and rtems_filesystem_prefix_separators. Remove rtems_filesystem_evaluate_parent.
  • libcsupport/src/base_fs.c, libcsupport/src/chdir.c, libcsupport/src/chmod.c, libcsupport/src/chown.c, libcsupport/src/chroot.c, libcsupport/src/fchdir.c, libcsupport/src/link.c, libcsupport/src/mount.c, libcsupport/src/open.c, libcsupport/src/privateenv.c, libcsupport/src/readlink.c, libcsupport/src/unmount.c, libcsupport/src/utime.c, libcsupport/src/unmount.c, libcsupport/src/utime.c, libfs/src/devfs/devfs.h, libfs/src/devfs/devfs_eval.c, libfs/src/devfs/devstat.c, libfs/src/dosfs/msdos_create.c, libfs/src/dosfs/msdos_misc.c, libfs/src/imfs/imfs.h, libfs/src/imfs/imfs_eval.c, libfs/src/imfs/imfs_load_tar.c, libfs/src/imfs/ioman.c, libfs/src/pipe/pipe.c, libmisc/fsmount/fsmount.c, libnetworking/lib/ftpfs.c: Add the length parameter to the eval call.
  • libcsupport/src/eval.c: Add rtems_filesystem_prefix_separators, rtems_filesystem_dirname, rtems_filesystem_evaluate_relative_path. Add the length parameter to the eval call.
  • libcsupport/src/rmdir.c: Find the parent pathloc then the node pathloc from that node. Remove the call to find the parent given the node pathloc.
  • libcsupport/src/stat.c: Add the length parameter to the eval call. Set the device into the rdev field.
  • libcsupport/src/unlink.c: Find the parent pathloc then the node pathloc from that node. Remove the call to find the parent given the node pathloc.
  • libfs/src/dosfs/fat.c, libfs/src/dosfs/msdos_format.c: Get the disk device number from the stat rdev field.
  • libfs/src/dosfs/msdos.h: Add the length parameter to the eval call. Add the parent pathloc to the rmnod handler.
  • libfs/src/dosfs/msdos_dir.c: Add the parent pathloc to the rmnod handler.
  • libfs/src/dosfs/msdos_eval.c: Add the length parameter to the eval and token call.
  • libfs/src/imfs/imfs_directory.c: Add the parent pathloc to the rmnod handler.
  • libfs/src/imfs/imfs_fchmod.c: Do not test the mode flags for only the allowed flags. Add the missing flags spec'ed in the POSIX standard.
  • libfs/src/imfs/imfs_fsunmount.c, libfs/src/imfs/imfs_rmnod.c, libfs/src/imfs/imfs_unlink.c, libfs/src/imfs/memfile.c: Add the parent node. Currently ignored in the IMFS.
  • libfs/src/imfs/imfs_stat.c: Return the device number in the rdev field.
  • libfs/src/imfs/imfs_mknod.c, libfs/src/imfs/imfs_symlink.c : Add the length parameter to the token call.
  • libfs/src/nfsclient/src/nfs.c: Add the length parameter to the eval call and parent node to the rmnod and unlink command.
  • libmisc/shell/internal.h: Remove the libc mounter decl to make public.
  • libmisc/shell/main_mount.c: Add support for hooking external mount support for new file systems.
  • libmisc/shell/shell.h: Add helper functions for the mount command.
  • Property mode set to 100644
File size: 1.3 KB
Line 
1/*
2 *  chroot() -  Change Root Directory
3 *  Author: fernando.ruiz@ctv.es
4 *
5 *  COPYRIGHT (c) 1989-2008.
6 *  On-Line Applications Research Corporation (OAR).
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.rtems.com/license/LICENSE.
11 *
12 *  $Id$
13 */
14
15#if HAVE_CONFIG_H
16#include "config.h"
17#endif
18
19#include <rtems.h>
20
21#include <unistd.h>
22#include <errno.h>
23
24#include <rtems/libio_.h>
25#include <rtems/seterr.h>
26
27int chroot(
28  const char *pathname
29)
30{
31  int                               result;
32  rtems_filesystem_location_info_t  loc;
33
34  /* an automatic call to new private env the first time */
35  if (rtems_current_user_env == &rtems_global_user_env) {
36   rtems_libio_set_private_env(); /* try to set a new private env*/
37   if (rtems_current_user_env == &rtems_global_user_env) /* not ok */
38    rtems_set_errno_and_return_minus_one( ENOTSUP );
39  }
40
41  result = chdir(pathname);
42  if (result) {
43    rtems_set_errno_and_return_minus_one( errno );
44  }
45
46  /* clone the new root location */
47  if (rtems_filesystem_evaluate_path(".", 1, 0, &loc, 0)) {
48    /* our cwd has changed, though - but there is no easy way of return :-( */
49    rtems_set_errno_and_return_minus_one( errno );
50  }
51  rtems_filesystem_freenode(&rtems_filesystem_root);
52  rtems_filesystem_root = loc;
53
54  return 0;
55}
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