1: Jeremy Bornstein wrote:
2:
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.
10:
11: To use this patch, run these commands for a successful build:
12:
13: patch -p1 <patches/date-only.diff
14: ./configure (optional if already run)
15: make
16:
17: based-on: e94bad1c156fc3910f24e2b3b71a81b0b0bdeb70
18: diff --git a/generator.c b/generator.c
19: --- a/generator.c
20: +++ b/generator.c
21: @@ -65,6 +65,7 @@ extern int append_mode;
22: extern int make_backups;
23: extern int csum_length;
24: extern int ignore_times;
25: +extern int date_only;
26: extern int size_only;
27: extern OFF_T max_size;
28: extern OFF_T min_size;
29: @@ -603,6 +604,9 @@ void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statre
30: /* Perform our quick-check heuristic for determining if a file is unchanged. */
31: int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
32: {
33: + if (date_only)
34: + return !mtime_differs(st, file);
35: +
36: if (st->st_size != F_LENGTH(file))
37: return 0;
38:
39: diff --git a/options.c b/options.c
40: --- a/options.c
41: +++ b/options.c
42: @@ -110,6 +110,7 @@ int safe_symlinks = 0;
43: int copy_unsafe_links = 0;
44: int munge_symlinks = 0;
45: int size_only = 0;
46: +int date_only = 0;
47: int daemon_bwlimit = 0;
48: int bwlimit = 0;
49: int fuzzy_basis = 0;
50: @@ -679,6 +680,7 @@ static struct poptOption long_options[] = {
51: {"chmod", 0, POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
52: {"ignore-times", 'I', POPT_ARG_NONE, &ignore_times, 0, 0, 0 },
53: {"size-only", 0, POPT_ARG_NONE, &size_only, 0, 0, 0 },
54: + {"date-only", 0, POPT_ARG_NONE, &date_only, 0, 0, 0 },
55: {"one-file-system", 'x', POPT_ARG_NONE, 0, 'x', 0, 0 },
56: {"no-one-file-system",0, POPT_ARG_VAL, &one_file_system, 0, 0, 0 },
57: {"no-x", 0, POPT_ARG_VAL, &one_file_system, 0, 0, 0 },
58: @@ -2782,6 +2784,9 @@ void server_options(char **args, int *argc_p)
59: else if (missing_args == 1 && !am_sender)
60: args[ac++] = "--ignore-missing-args";
61:
62: + if (date_only)
63: + args[ac++] = "--date-only";
64: +
65: if (modify_window_set && am_sender) {
66: char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
67: if (asprintf(&arg, fmt, modify_window) < 0)
68: diff --git a/rsync.1.md b/rsync.1.md
69: --- a/rsync.1.md
70: +++ b/rsync.1.md
71: @@ -418,6 +418,7 @@ detailed description below for a complete description.
72: --contimeout=SECONDS set daemon connection timeout in seconds
73: --ignore-times, -I don't skip files that match size and time
74: --size-only skip files that match in size
75: +--date-only skip files that match in mod-time
76: --modify-window=NUM, -@ set the accuracy for mod-time comparisons
77: --temp-dir=DIR, -T create temporary files in directory DIR
78: --fuzzy, -y find similar file for basis if no dest file
79: @@ -660,6 +661,14 @@ your home directory (remove the '=' for that).
80: after using another mirroring system which may not preserve timestamps
81: exactly.
82:
83: +0. `--date-only`
84: +
85: + Normally rsync will skip any files that are already the same size and have
86: + the same modification time-stamp. With the --date-only option, files will
87: + be skipped if they have the same timestamp, regardless of size. This may be
88: + useful when the remote files have passed through a size-changing filter,
89: + e.g. for encryption.
90: +
91: 0. `--modify-window=NUM`, `-@`
92:
93: When comparing two timestamps, rsync treats the timestamps as being equal
94: diff -Nurp a/rsync.1 b/rsync.1
95: --- a/rsync.1
96: +++ b/rsync.1
97: @@ -494,6 +494,7 @@ detailed description below for a complet
98: --contimeout=SECONDS set daemon connection timeout in seconds
99: --ignore-times, -I don't skip files that match size and time
100: --size-only skip files that match in size
101: +--date-only skip files that match in mod-time
102: --modify-window=NUM, -@ set the accuracy for mod-time comparisons
103: --temp-dir=DIR, -T create temporary files in directory DIR
104: --fuzzy, -y find similar file for basis if no dest file
105: @@ -727,6 +728,12 @@ either a changed size or a changed last-
106: files that have changed in size. This is useful when starting to use rsync
107: after using another mirroring system which may not preserve timestamps
108: exactly.
109: +.IP "\fB\-\-date-only\fP"
110: +Normally rsync will skip any files that are already the same size and have
111: +the same modification time-stamp. With the \-\-date-only option, files will
112: +be skipped if they have the same timestamp, regardless of size. This may be
113: +useful when the remote files have passed through a size-changing filter,
114: +e.g. for encryption.
115: .IP "\fB\-\-modify-window=NUM\fP, \fB\-@\fP"
116: When comparing two timestamps, rsync treats the timestamps as being equal
117: if they differ by no more than the modify-window value. The default is 0,
118: diff -Nurp a/rsync.1.html b/rsync.1.html
119: --- a/rsync.1.html
120: +++ b/rsync.1.html
121: @@ -409,6 +409,7 @@ detailed description below for a complet
122: --contimeout=SECONDS set daemon connection timeout in seconds
123: --ignore-times, -I don't skip files that match size and time
124: --size-only skip files that match in size
125: +--date-only skip files that match in mod-time
126: --modify-window=NUM, -@ set the accuracy for mod-time comparisons
127: --temp-dir=DIR, -T create temporary files in directory DIR
128: --fuzzy, -y find similar file for basis if no dest file
129: @@ -646,6 +647,14 @@ after using another mirroring system whi
130: exactly.</p>
131: </dd>
132:
133: +<dt><code>--date-only</code></dt><dd>
134: +<p>Normally rsync will skip any files that are already the same size and have
135: +the same modification time-stamp. With the -⁠-⁠date-only option, files will
136: +be skipped if they have the same timestamp, regardless of size. This may be
137: +useful when the remote files have passed through a size-changing filter,
138: +e.g. for encryption.</p>
139: +</dd>
140: +
141: <dt><code>--modify-window=NUM</code>, <code>-@</code></dt><dd>
142: <p>When comparing two timestamps, rsync treats the timestamps as being equal
143: if they differ by no more than the modify-window value. The default is 0,
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