Add root dir option - dedup - deduplicating backup program
HTML git clone git://bitreich.org/dedup/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/dedup/
DIR Log
DIR Files
DIR Refs
DIR Tags
DIR README
DIR LICENSE
---
DIR commit 367928d1742c6f7b12720e6c60a9292e6b708c7c
DIR parent 34990ad2e3066a5fd23cebc22b997dff63ac272a
HTML Author: sin <sin@2f30.org>
Date: Wed, 21 Mar 2018 16:08:11 +0000
Add root dir option
Thanks lostd!
Diffstat:
M README | 18 +++++++++---------
M dedup.c | 12 ++++++++++--
2 files changed, 19 insertions(+), 11 deletions(-)
---
DIR diff --git a/README b/README
@@ -4,29 +4,29 @@ used in a pipeline with tar/gpg etc.
dedup only handles a single file at a time, so using tar is advised.
For example, to dedup a tar file you can invoke dedup as follows:
- tar cf - ~/bak | dedup
+ tar cf - ~/bak | dedup -r ~/bak-dedup
-This will create .{cache,index,store} files in the current directory.
-The store file contains all the unique blocks. The index file
-contains all the revisions of files that have been deduplicated. Each
-revision is identified by its SHA256 hash. The cache file is only
-used to speed up block comparison.
+This will create .{cache,index,store} files in the ~/bak-dedup
+directory. The store file contains all the unique blocks. The index
+file contains all the revisions of files that have been deduplicated.
+Each revision is identified by its SHA256 hash. The cache file is
+only used to speed up block comparison.
To list all known revisions run:
- dedup -l
+ dedup -r ~/bak-dedup -l
You will get a list of hashes. Each hash corresponds to a single file
(in this case, a tar archive).
To extract a file from the deduplicated store run:
- dedup -e <hash> > bak.tar
+ dedup -r ~/bak-dedup -e <hash> > bak.tar
You can mix dedup with other programs like gpg(1). For example to
perform a remote backup you can use the following command:
- tar cf - ~/bak | gpg -c | ssh user@host dedup
+ tar cf - ~/bak | gpg -c | ssh user@host dedup -r ~/bak-dedup
Cheers,
sin
DIR diff --git a/dedup.c b/dedup.c
@@ -519,14 +519,14 @@ term(void)
void
usage(void)
{
- fprintf(stderr, "usage: %s [-clv] [-e id] [file]\n", argv0);
+ fprintf(stderr, "usage: %s [-clv] [-e id] [-r root] [file]\n", argv0);
exit(1);
}
int
main(int argc, char *argv[])
{
- char *id = NULL;
+ char *id = NULL, *root = NULL;
int fd = -1, lflag = 0, cflag = 0;
ARGBEGIN {
@@ -539,6 +539,9 @@ main(int argc, char *argv[])
case 'l':
lflag = 1;
break;
+ case 'r':
+ root = EARGF(usage());
+ break;
case 'v':
verbose = 1;
break;
@@ -549,6 +552,11 @@ main(int argc, char *argv[])
if (argc > 1)
usage();
+ if (root != NULL) {
+ mkdir(root, 0700);
+ chdir(root);
+ }
+
init();
if (cflag) {