When copying locally as well as remotely inside a setgid dir, the option --times has the unwanted side effect of making the newly created directories not have the setgid bit set, but only when the user running rsync is not a member of the corresponding group. The extra option --omit-dir-times prevents the loss of the setgid bit in this case.
Is this a bug as I think it is? Note that files 2-levels deep in the copied hierarchy do not have the group set to the one of the setgid directory containing the hierarchy. Here is a test log: $ mkdir dir test $ touch dir/file $ chmod 0750 dir $ chmod 2750 test $ sudo chgrp games test $ groups |grep games $ rsync -r dir test $ ls -l test total 4 drwxr-s--- 2 guest games 4096 Jan 4 06:43 dir/ $ rm -rf test/dir $ rsync -rt dir test $ ls -l test total 4 drwxr-x--- 2 guest games 4096 Jan 4 06:32 dir/ $ rm -rf test/dir $ rsync -rtO dir test $ ls -l test total 4 drwxr-s--- 2 guest games 4096 Jan 4 06:43 dir/ $ rm -rf test/dir The version is the latest (3.1.2 from Debian stretch): $ rsync --version rsync version 3.1.2 protocol version 31 Copyright (C) 1996-2015 by Andrew Tridgell, Wayne Davison, and others. Web site: http://rsync.samba.org/ Capabilities: 64-bit files, 64-bit inums, 64-bit timestamps, 64-bit long ints, socketpairs, hardlinks, symlinks, IPv6, batchfiles, inplace, append, ACLs, xattrs, iconv, symtimes, prealloc rsync comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under certain conditions. See the GNU General Public Licence for details. $ dpkg -l rsync Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-=============================-===================-===================-=============================================================== ii rsync 3.1.2-1+deb9u1 amd64 fast, versatile, remote (and local) file-copying tool Regards, -- Géraud Meyer -- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html