1 Greetings, and thanks for all of your work on the wonderful rsync!
3 I recently had the need to transfer files only with different mod
4 dates (and to *not* transfer them based on file size differences).
5 This is because I'm backing up files remotely on an untrusted machine,
6 so I'm encrypting them with gpg before transfer. I discovered that
7 rsync didn't already have a --date-only flag, so I added one and am
8 enclosing the diffs in case you (as I hope) decide to include this
9 option in future releases.
16 [Patched update to have context and apply to latest CVS source.]
18 --- generator.c 15 Apr 2004 16:55:23 -0000 1.79
19 +++ generator.c 15 Apr 2004 19:06:13 -0000
20 @@ -50,11 +50,14 @@ extern int list_only;
21 extern int only_existing;
22 extern int orig_umask;
23 extern int safe_symlinks;
24 +extern int date_only;
27 /* choose whether to skip a particular file */
28 static int skip_file(char *fname, struct file_struct *file, STRUCT_STAT *st)
31 + return cmp_modtime(st->st_mtime,file->modtime) == 0;
32 if (st->st_size != file->length) {
35 --- options.c 14 Apr 2004 23:33:34 -0000 1.146
36 +++ options.c 15 Apr 2004 19:06:13 -0000
37 @@ -82,6 +82,7 @@ int keep_partial = 0;
38 int safe_symlinks = 0;
39 int copy_unsafe_links = 0;
44 int only_existing = 0;
45 @@ -262,6 +263,7 @@ void usage(enum logcode F)
46 rprintf(F," --timeout=TIME set I/O timeout in seconds\n");
47 rprintf(F," -I, --ignore-times turn off mod time & file size quick check\n");
48 rprintf(F," --size-only ignore mod time for quick check (use size)\n");
49 + rprintf(F," --date-only ignore size for quick check (use mod time)\n");
50 rprintf(F," --modify-window=NUM compare mod times with reduced accuracy\n");
51 rprintf(F," -T --temp-dir=DIR create temporary files in directory DIR\n");
52 rprintf(F," --compare-dest=DIR also compare destination files relative to DIR\n");
53 @@ -316,6 +318,7 @@ static struct poptOption long_options[]
54 {"password-file", 0, POPT_ARG_STRING, &password_file, 0, 0, 0 },
55 {"ignore-times", 'I', POPT_ARG_NONE, &ignore_times, 0, 0, 0 },
56 {"size-only", 0, POPT_ARG_NONE, &size_only, 0, 0, 0 },
57 + {"date-only", 0, POPT_ARG_NONE, &date_only, 0, 0, 0 },
58 {"modify-window", 0, POPT_ARG_INT, &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
59 {"one-file-system", 'x', POPT_ARG_NONE, &one_file_system, 0, 0, 0 },
60 {"delete", 0, POPT_ARG_NONE, &delete_mode, 0, 0, 0 },
61 @@ -905,6 +908,9 @@ void server_options(char **args,int *arg
64 args[ac++] = "--size-only";
67 + args[ac++] = "--date-only";
69 if (modify_window_set) {
70 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
71 --- rsync.yo 15 Apr 2004 18:32:24 -0000 1.157
72 +++ rsync.yo 15 Apr 2004 19:06:15 -0000
74 --timeout=TIME set I/O timeout in seconds
75 -I, --ignore-times turn off mod time & file size quick check
76 --size-only ignore mod time for quick check (use size)
77 + --date-only ignore size for quick check (use mod time)
78 --modify-window=NUM compare mod times with reduced accuracy
79 -T --temp-dir=DIR create temporary files in directory DIR
80 --compare-dest=DIR also compare received files relative to DIR
82 regardless of timestamp. This is useful when starting to use rsync
83 after using another mirroring system which may not preserve timestamps
86 +dit(bf(--date-only)) Normally rsync will skip any files that are
87 +already the same size and have the same modification time-stamp. With the
88 +--date-only option, files will be skipped if they have the same
89 +timestamp, regardless of size. This may be useful when the remote
90 +files have passed through a size-changing filter, e.g. for encryption.
92 dit(bf(--modify-window)) When comparing two timestamps rsync treats
93 the timestamps as being equal if they are within the value of