Dave Dykstra wrote: > Wouldn't encrypting the file with gpg change the timestamp as well as the > size, so rsync would still copy the file?
It certainly does--which is why I reset it afterwards. Although the backup script I use is pretty simple, having this patch to rsync does not obviate it. I actually call rsync twice--once to determine the list of files to be transferred, and once to transfer the encrypted files. In-between I do the actual encryption (and munging of the mod dates). -j > On Tue, Mar 19, 2002 at 08:21:36AM -0800, jeremy bornstein wrote: > > Martin, > > > > The encryption program I'm using, gpg, includes a small bit of header > > information with the encrypted file, thus changing the size. Gpg is a > > public key encryption program which at least includes the numeric key > > ID of the recipient's key. Since folks can have many keys, this is > > useful information to have with each bit of data. It might be > > possible to strip this information off, but then the whole process > > would be version-sensitive and thus error-prone, which is not what I'd > > like in a backup program! > > > > (There's much more info at <URL:http://www.gnupg.org/> if you like.) > > > > I suspect I'm not the only one who would be interested in using this > > feature for this purpose, but of course I can't say for certain. > > > > Best, > > > > -jeremy > > > > On Tue, Mar 19, 2002 at 06:11:44AM +1100, Martin Pool wrote: > > > Jeremy, > > > > > > I'm glad you like rsync. > > > > > > Why does your encryption program not produce a file of the same size > > > every time it is run on the same input? I can see what the patch > > > does, but I'm having a bit of trouble understanding whether it would > > > be generally useful. > > > > > > -- > > > Martin > > > > > Date: Sun, 17 Mar 2002 06:31:40 -0800 > > > From: jeremy bornstein <[EMAIL PROTECTED]> > > > To: Martin Pool <[EMAIL PROTECTED]> > > > Subject: thanks and patch > > > > > > 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 > > > > > > > > -- > > jeremy bornstein <[EMAIL PROTECTED]> > > -*- > > to be free of all authority, of your own and that of another, is > > to die to everything of yesterday, so that your mind is always > > fresh, always young, innocent, full of vigour and passion. > > [j. krishnamurti, _freedom from the known_] > > -*- > > http://jeremy.org/ > > > > -- > > To unsubscribe or change options: http://lists.samba.org/mailman/listinfo/rsync > > Before posting, read: http://www.tuxedo.org/~esr/faqs/smart-questions.html -- To unsubscribe or change options: http://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.tuxedo.org/~esr/faqs/smart-questions.html