| | 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 | --- old/generator.c |
| | 18 | +++ new/generator.c |
| | 19 | @@ -61,6 +61,7 @@ extern int append_mode; |
| | 20 | extern int make_backups; |
| | 21 | extern int csum_length; |
| | 22 | extern int ignore_times; |
| | 23 | +extern int date_only; |
| | 24 | extern int size_only; |
| | 25 | extern OFF_T max_size; |
| | 26 | extern OFF_T min_size; |
| | 27 | @@ -619,6 +620,9 @@ void itemize(const char *fnamecmp, struc |
| | 28 | /* Perform our quick-check heuristic for determining if a file is unchanged. */ |
| | 29 | int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st) |
| | 30 | { |
| | 31 | + if (date_only) |
| | 32 | + return cmp_time(st->st_mtime, file->modtime) == 0; |
| | 33 | + |
| | 34 | if (st->st_size != F_LENGTH(file)) |
| | 35 | return 0; |
| | 36 | |
| | 37 | --- old/options.c |
| | 38 | +++ new/options.c |
| | 39 | @@ -103,6 +103,7 @@ int keep_partial = 0; |
| | 40 | int safe_symlinks = 0; |
| | 41 | int copy_unsafe_links = 0; |
| | 42 | int size_only = 0; |
| | 43 | +int date_only = 0; |
| | 44 | int daemon_bwlimit = 0; |
| | 45 | int bwlimit = 0; |
| | 46 | int fuzzy_basis = 0; |
| | 47 | @@ -380,6 +381,7 @@ void usage(enum logcode F) |
| | 48 | rprintf(F," --timeout=TIME set I/O timeout in seconds\n"); |
| | 49 | rprintf(F," -I, --ignore-times don't skip files that match in size and mod-time\n"); |
| | 50 | rprintf(F," --size-only skip files that match in size\n"); |
| | 51 | + rprintf(F," --date-only skip files that match in mod-time\n"); |
| | 52 | rprintf(F," --modify-window=NUM compare mod-times with reduced accuracy\n"); |
| | 53 | rprintf(F," -T, --temp-dir=DIR create temporary files in directory DIR\n"); |
| | 54 | rprintf(F," -y, --fuzzy find similar file for basis if no dest file\n"); |
| | 55 | @@ -520,6 +522,7 @@ static struct poptOption long_options[] |
| | 56 | {"chmod", 0, POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 }, |
| | 57 | {"ignore-times", 'I', POPT_ARG_NONE, &ignore_times, 0, 0, 0 }, |
| | 58 | {"size-only", 0, POPT_ARG_NONE, &size_only, 0, 0, 0 }, |
| | 59 | + {"date-only", 0, POPT_ARG_NONE, &date_only, 0, 0, 0 }, |
| | 60 | {"one-file-system", 'x', POPT_ARG_NONE, 0, 'x', 0, 0 }, |
| | 61 | {"update", 'u', POPT_ARG_NONE, &update_only, 0, 0, 0 }, |
| | 62 | {"existing", 0, POPT_ARG_NONE, &ignore_non_existing, 0, 0, 0 }, |
| | 63 | @@ -1897,6 +1900,9 @@ void server_options(char **args, int *ar |
| | 64 | } |
| | 65 | } |
| | 66 | |
| | 67 | + if (date_only) |
| | 68 | + args[ac++] = "--date-only"; |
| | 69 | + |
| | 70 | if (modify_window_set) { |
| | 71 | if (asprintf(&arg, "--modify-window=%d", modify_window) < 0) |
| | 72 | goto oom; |
| | 73 | --- old/rsync.yo |
| | 74 | +++ new/rsync.yo |
| | 75 | @@ -382,6 +382,7 @@ to the detailed description below for a |
| | 76 | --timeout=TIME set I/O timeout in seconds |
| | 77 | -I, --ignore-times don't skip files that match size and time |
| | 78 | --size-only skip files that match in size |
| | 79 | + --date-only skip files that match in mod-time |
| | 80 | --modify-window=NUM compare mod-times with reduced accuracy |
| | 81 | -T, --temp-dir=DIR create temporary files in directory DIR |
| | 82 | -y, --fuzzy find similar file for basis if no dest file |
| | 83 | @@ -502,6 +503,12 @@ time to just looking for files that have |
| | 84 | when starting to use rsync after using another mirroring system which may |
| | 85 | not preserve timestamps exactly. |
| | 86 | |
| | 87 | +dit(bf(--date-only)) Normally rsync will skip any files that are |
| | 88 | +already the same size and have the same modification time-stamp. With the |
| | 89 | +--date-only option, files will be skipped if they have the same |
| | 90 | +timestamp, regardless of size. This may be useful when the remote |
| | 91 | +files have passed through a size-changing filter, e.g. for encryption. |
| | 92 | + |
| | 93 | dit(bf(--modify-window)) When comparing two timestamps, rsync treats the |
| | 94 | timestamps as being equal if they differ by no more than the modify-window |
| | 95 | value. This is normally 0 (for an exact match), but you may find it useful |
Matt McCutchen's Web Site / rsync / rsync-patches.git / blame_incremental