1 % bup-restore(1) Bup %BUP_VERSION%
2 % Avery Pennarun <apenwarr@gmail.com>
7 bup-restore - extract files from a backup set
11 bup restore [\--outdir=*outdir*] [-v] [-q] \<paths...\>;
15 `bup restore` extracts files from a backup set (created
16 with `bup-save`(1)) to the local filesystem.
18 The specified *paths* are of the form
19 /_branch_/_revision_/_some/where_. The components of the
23 : the name of the backup set to restore from; this
24 corresponds to the `--name` (`-n`) option to `bup save`.
27 : the revision of the backup set to restore. The
28 revision *latest* is always the most recent
29 backup on the given branch. You can discover other
30 revisions using `bup ls /branch`.
33 : the previously saved path (after any stripping/grafting) that you
34 want to restore. For example, `etc/passwd`.
36 If _some/where_ names a directory, `bup restore` will restore that
37 directory and then recursively restore its contents.
39 If _some/where_ names a directory and ends with a slash (ie.
40 path/to/dir/), `bup restore` will restore the children of that
41 directory directly to the current directory (or the `--outdir`). If
42 _some/where_ does not end in a slash, the children will be restored to
43 a subdirectory of the current directory.
45 If _some/where_ names a directory and ends in '/.' (ie.
46 path/to/dir/.), `bup restore` will do exactly what it would have done
47 for path/to/dir, and then restore _dir_'s metadata to the current
48 directory (or the `--outdir`). See the EXAMPLES section.
50 Whenever path metadata is available, `bup restore` will attempt to
51 restore it. When restoring ownership, bup implements tar/rsync-like
52 semantics. It will not try to restore the user unless running as
53 root, and it will fall back to the numeric uid or gid whenever the
54 metadata contains a user or group name that doesn't exist on the
55 current system. The use of user and group names can be disabled via
56 `--numeric-ids` (which can be important when restoring a chroot, for
57 example), and as a special case, a uid or gid of 0 will never be
60 Hardlinks will also be restored when possible, but at least currently,
61 no links will be made to targets outside the restore tree, and if the
62 restore tree spans a different arrangement of filesystems from the
63 save tree, some hardlink sets may not be completely restored.
65 Also note that changing hardlink sets on disk between index and save
66 may produce unexpected results. With the current implementation, bup
67 will attempt to recreate any given hardlink set as it existed at index
68 time, even if all of the files in the set weren't still hardlinked
69 (but were otherwise identical) at save time.
71 Note that during the restoration process, access to data within the
72 restore tree may be more permissive than it was in the original
73 source. Unless security is irrelevant, you must restore to a private
74 subdirectory, and then move the resulting tree to its final position.
75 See the EXAMPLES section for a demonstration.
79 -C, \--outdir=*outdir*
80 : create and change to directory *outdir* before
84 : restore numeric IDs (user, group, etc.) rather than names.
87 : increase log output. Given once, prints every
88 directory as it is restored; given twice, prints every
92 : don't show the progress meter. Normally, is stderr is
93 a tty, a progress display is printed that shows the
94 total number of files restored.
98 Create a simple test backup set:
101 $ bup save -n mybackup /etc/passwd /etc/profile
103 Restore just one file:
105 $ bup restore /mybackup/latest/etc/passwd
109 -rw-r--r-- 1 apenwarr apenwarr 1478 2010-09-08 03:06 passwd
111 Restore etc to test (no trailing slash):
113 $ bup restore -C test /mybackup/latest/etc
122 Restore the contents of etc to test (trailing slash):
124 $ bup restore -C test /mybackup/latest/etc/
132 Restore the contents of etc and etc's metadata to test (trailing
135 $ bup restore -C test /mybackup/latest/etc/.
138 # At this point test and etc's metadata will match.
144 Restore a tree without risk of unauthorized access:
146 # mkdir --mode 0700 restore-tmp
148 # bup restore -C restore-tmp /somebackup/latest/foo
151 # mv restore-tmp/foo somewhere
158 `bup-save`(1), `bup-ftp`(1), `bup-fuse`(1), `bup-web`(1)
162 Part of the `bup`(1) suite.