rsync - detecting change/no-change without an itemised list

[Robert Bell]

rsync watchers,

I've been using rsync  version 3.1.1+, and do like the improved --stats
output:  e.g.
Number of files: 2480403 (reg: 2034290, dir: 233487, link: 212174, special: 452)
Number of created files: 356 (reg: 6, dir: 3, link: 347)
Number of regular files transferred: 16
...
  - thanks to the developers.

However, I want to be able to look at the --stats output and make a
decision about whether anything changed or not, and would rather not
have to turn on -i and count the entries.

Here's an example:
  - setting up source and dest directories
  - setting up a file in source
  - rsyncing source to dest
  - changing the permissions on the source file
  - redoing rsync
  - looking at the --stats output, and finding no clue in the --stats output
that anything changed, whereas the -i output shows a change.

(The files are local, so --whole-file is in effect).

======================================================================================
prompt>  mkdir source dest
prompt>  echo a > source/a
prompt> /usr/local/bin/rsync -a  -i --stats source/ dest
.d..t...... ./
>f+++++++++ a

Number of files: 2 (reg: 1, dir: 1)
Number of created files: 1 (reg: 1)
Number of deleted files: 0
Number of regular files transferred: 1
Total file size: 2 bytes
Total transferred file size: 2 bytes
Literal data: 2 bytes
Matched data: 0 bytes
File list size: 0
File list generation time: 0.001 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 122
Total bytes received: 38

sent 122 bytes  received 38 bytes  320.00 bytes/sec
total size is 2  speedup is 0.01
prompt>  chmod g+rw source/a
prompt> /usr/local/bin/rsync -a  -i --stats source/ dest
.f...p..... a

Number of files: 2 (reg: 1, dir: 1)
Number of created files: 0
Number of deleted files: 0
Number of regular files transferred: 0
Total file size: 2 bytes
Total transferred file size: 0 bytes
Literal data: 0 bytes
Matched data: 0 bytes
File list size: 0
File list generation time: 0.001 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 77
Total bytes received: 19

sent 77 bytes  received 19 bytes  192.00 bytes/sec
total size is 2  speedup is 0.02
prompt> 
======================================================================================

Any clues please?



Regards

Rob.

Dr Robert C. Bell
HPC National Partnerships | Scientific Computing
CSIRO Information Management and Technology
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---------- Forwarded message ----------
Date: Wed, 18 Nov 2015 12:00:02 +0000
From: rsync-request at lists.samba.org
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Subject: rsync Digest, Vol 155, Issue 4
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