Greetings, and thanks for all of your work on the wonderful rsync!

I recently had the need to transfer files only with different mod
dates (and to *not* transfer them based on file size differences).
This is because I'm backing up files remotely on an untrusted machine,
so I'm encrypting them with gpg before transfer.  I discovered that
rsync didn't already have a --date-only flag, so I added one and am
enclosing the diffs in case you (as I hope) decide to include this
option in future releases.

Again, thanks!

Best Regards,
Jeremy Bornstein
diff rsync-2.5.4/README rsync-2.5.4-patched/README
70a71
>      --date-only             only use modification date when determining if a file should be transferred
Common subdirectories: rsync-2.5.4/doc and rsync-2.5.4-patched/doc
diff rsync-2.5.4/generator.c rsync-2.5.4-patched/generator.c
39a40
> extern int date_only;
50a52,56
> 	if (date_only) {
> 		return (cmp_modtime(st->st_mtime,file->modtime) == 0);
> 	}
> 
> 
Common subdirectories: rsync-2.5.4/lib and rsync-2.5.4-patched/lib
diff rsync-2.5.4/options.c rsync-2.5.4-patched/options.c
64a65
> int date_only=0;
223a225
>   rprintf(F,"     --date-only             only use modification date when determining if a file should be transferred\n");
265c267
<       OPT_LOG_FORMAT, OPT_PASSWORD_FILE, OPT_SIZE_ONLY, OPT_ADDRESS,
---
>       OPT_LOG_FORMAT, OPT_PASSWORD_FILE, OPT_SIZE_ONLY, OPT_DATE_ONLY, OPT_ADDRESS,
278a281
>   {"date-only",        0,  POPT_ARG_NONE,   &date_only},
704a708,710
> 
> 	if (date_only)
> 		args[ac++] = "--date-only";
Common subdirectories: rsync-2.5.4/packaging and rsync-2.5.4-patched/packaging
Common subdirectories: rsync-2.5.4/popt and rsync-2.5.4-patched/popt
diff rsync-2.5.4/rsync.1 rsync-2.5.4-patched/rsync.1
289a290
>      --date-only             only use modification date when determining if a file should be transferred
363a365,371
> .IP 
> .IP "\fB--date-only\fP" 
> Normally rsync will skip any files that are
> already the same length and have the same time-stamp\&. With the
> --date-only option files will be skipped if they have the same timestamp,
> regardless of size\&. This may be useful when the remote files have passed
> through a size-changing filter, e.g. for encryption\&.
diff rsync-2.5.4/rsync.yo rsync-2.5.4-patched/rsync.yo
260a261
>      --date-only             only use modification date when determining if a file should be transferred
326a328,333
> 
> dit(bf(--date-only)) Normally rsync will skip any files that are
> already the same length and have the same time-stamp. With the
> --date-only option files will be skipped if they have the same
> timestamp, regardless of size. This may be useful when the remote
> files have passed through a size-changing filter, e.g. for encryption.
Common subdirectories: rsync-2.5.4/testhelp and rsync-2.5.4-patched/testhelp
Common subdirectories: rsync-2.5.4/testsuite and rsync-2.5.4-patched/testsuite
Common subdirectories: rsync-2.5.4/zlib and rsync-2.5.4-patched/zlib