I'm not really blaming the user. If it were up to me, -v would include -i.
On 2/9/24 05:36, Andreas Gruenbacher wrote:
On Sun, Feb 4, 2024 at 7:20 PM Kevin Korb via rsync
<rsync@lists.samba.org> wrote:
rsync's -v is fairly useless. Learn to use -i instead or in addition to.
Well, note that I didn't say anything about the lib/ directory in that
command; it's just that rsync decided to remove the symlink component
from the path lib/modules/.
Wouldn't it be more useful to make it obvious in the --verbose and
--dry-run output what rsync has actually decided to do instead of
blaming the user, which is what you're doing? Especially if the
behavior is all but self-explanatory?
Thanks,
Andreas
On 2/4/24 12:58, Andreas Gruenbacher via rsync wrote:
Hello,
when trying to rsync files between hosts, I ran into a surprising case
in which rsync replaces a symlink with a directory, with no indication
of any kind.
In the following reproducer, rsync is called as follows:
rsync --verbose --recursive --relative --delete a/./lib/modules b/
Directory b contains a 'lib' symlink pointing to 'usr/lib', and rsync
removes that and replaces it with a directory.
In my real-world use case, this caused '/lib' -> '/usr/lib' symlinks
to be replaced with '/lib' directories, which left the receiving test
machines in a fairly sad state.
I have since figured out that I can get rsync to behave as expected by
adding the --keep-dirlinks option, but ...
it's very unfortunate that when rsync does that kind of thing, it
leaves no indication in the 'rsync --dry-run' and 'rsync -v' output.
Could that please be fixed?
Thanks,
Andreas
#! /bin/sh
tmp=$(mktemp -dt ${0##*/}.XXXXXXXXXX)
trap 'cd /; rm -rf $tmp' EXIT
cd "$tmp"
umask 022
mkdir -p a/lib/modules
echo foo > a/lib/modules/foo
mkdir -p b/usr/lib/modules
ln -s usr/lib b/lib
show() {
find "$@" | xargs stat -c "%F %N" | sort -k2
}
echo "from:"
show a
echo
echo "to:"
show b
echo
echo "rsync:"
rsync \
--verbose \
--recursive \
--relative \
--delete \
a/./lib/modules \
b/
echo
echo "to:"
show b
# SCRIPT OUTPUT with rsync 3.2.7:
# ==============================
=
# from:
# directory 'a'
# directory 'a/lib'
# directory 'a/lib/modules'
# regular file 'a/lib/modules/foo'
#
# to:
# directory 'b'
# directory 'b/usr'
# directory 'b/usr/lib'
# directory 'b/usr/lib/modules'
# symbolic link 'b/lib' -> 'usr/lib'
#
# rsync:
# sending incremental file list
# lib/
# lib/modules/
# lib/modules/foo
#
# sent 160 bytes received 47 bytes 414.00 bytes/sec
# total size is 4 speedup is 0.02
#
# to:
# directory 'b'
# directory 'b/lib'
# directory 'b/lib/modules'
# directory 'b/usr'
# directory 'b/usr/lib'
# directory 'b/usr/lib/modules'
# regular file 'b/lib/modules/foo'
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