rsync status in OS X Tiger 10.4.7
=================================
The below are the findings listed for rsync. I'd imagine similar
findings for tar and other tools that rely on copyfile() to properly
(or in this case, improperly) operate.
Findings
--------
- preserves ACLs on files w/o Extended Attributes, yet mangles the
ACL's private EA values
- crashes copying files with both ACLs and Extended Attributes
- fails to copy Extended Attributes, generates warning
- fails to maintain creation dates, munges with modification date
- fails to maintain BSD (chflag) flags
- symlink ownerships are preserved
Advice
------
rsync should be avoided for copying files unless you can live with
the above limitations
Evidence
--------
#create some files
dshoop@ooblek:/Volumes/OoblekData/dshoop
1 % ssh root@yertle
Last login: Sun Apr 9 13:41:15 2006 from 192.168.1.1
Welcome to Darwin!
yertle:~ root# uname -v
Darwin Kernel Version 8.7.0: Fri May 26 15:20:53 PDT 2006;
root:xnu-792.6.76.obj~1/RELEASE_PPC
yertle:~ root# touch file
yertle:~ root# touch filexattr
yertle:~ root# touch fileacl
yertle:~ root# touch fileboth
yertle:~ root# touch filebsdflag
yertle:~ root# /usr/local/bin/xattr --set color blue filexattr
yertle:~ root# /usr/local/bin/xattr --set color blue fileboth
yertle:~ root# chmod +a "admin allow read" fileacl
yertle:~ root# chmod +a "admin allow read" fileboth
yertle:~ root# chflags arch filebsdflag
# ACL test
yertle:~ root# rsync -avE fileacl fileacl2
building file list ... done
fileacl
._fileacl
sent 374 bytes received 60 bytes 868.00 bytes/sec
total size is 0 speedup is 0.00
yertle:~ root# ls -alse fileacl*
0 -rw-r--r-- + 1 root wheel 0 Jun 29 17:59 fileacl
0: group:admin allow read
0 -r-------- + 1 root wheel 0 Jun 29 17:59 fileacl2
0: group:admin allow read
# ACL is, however, mangled as an EA
yertle:~ root# /usr/local/bin/xattr --list fileacl
fileacl
yertle:~ root# /usr/local/bin/xattr --list fileacl2
fileacl2
com.apple.acl.text !#acl 1
group:ABCDEFAB-CDEF-ABCD-EFAB-CDEF00000050:admin:80:allow:read
# Extended Attribute test
yertle:~ root# rsync -avE filexattr filexattr2
building file list ... done
filexattr
file has vanished: "/private/var/root/._filexattr"
sent 111 bytes received 60 bytes 342.00 bytes/sec
total size is 0 speedup is 0.00
rsync warning: some files vanished before they could be transferred
(code 24) at /SourceCache/rsync/rsync-24/rsync/main.c(717)
yertle:~ root# xattr --list filexattr*
-sh: xattr: command not found
yertle:~ root# /usr/local/bin/xattr --list filexattr*
filexattr
color blue
filexattr2
# ACL + EA test
# this also generates a crash and crash dump if CrashReporter is enabled!!
yertle:~ root# rsync -avE fileboth fileboth2
building file list ... done
fileboth
._fileboth
rsync: connection unexpectedly closed (61 bytes received so far) [generator]
rsync error: error in rsync protocol data stream (code 12) at
/SourceCache/rsync/rsync-24/rsync/io.c(359)
rsync: connection unexpectedly closed (52 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at
/SourceCache/rsync/rsync-24/rsync/io.c(359)
# creation date test
yertle:~ root# touch file
yertle:~ root# /Developer/Tools/GetFileInfo file
file: "/private/var/root/file"
type: ""
creator: ""
attributes: avbstclinmedz
created: 06/29/2006 18:03:42
modified: 06/29/2006 18:10:03
yertle:~ root# rsync -avE file file2
building file list ... done
file
sent 84 bytes received 40 bytes 248.00 bytes/sec
total size is 0 speedup is 0.00
yertle:~ root# /Developer/Tools/GetFileInfo file2
file: "/private/var/root/file2"
type: ""
creator: ""
attributes: avbstclinmedz
created: 06/29/2006 18:10:03
modified: 06/29/2006 18:10:03
# BSD flag test
yertle:~ root# ls -also filebsdflag
0 -rw-r--r-- 1 root wheel arch 0 Jun 29 18:00 filebsdflag
yertle:~ root# rsync -avE filebsdflag filebsdflag2
building file list ... done
filebsdflag
sent 91 bytes received 40 bytes 262.00 bytes/sec
total size is 0 speedup is 0.00
yertle:~ root# ls -also filebsdflag2
0 -rw-r--r-- 1 root wheel - 0 Jun 29 18:00 filebsdflag2
# symlink ownership test
yertle:~ root# su -l dshoop
yertle:~ dshoop$ cd /
yertle:/ dshoop$ touch file
yertle:/ dshoop$ ln -s file filesymlink
yertle:/ dshoop$ ls -als file
0 -rw-r--r-- 1 dshoop admin 0 Jun 29 18:18 file
yertle:/ dshoop$ ls -als filesymlink
8 lrwxr-xr-x 1 dshoop admin 4 Jun 29 18:19 filesymlink -> file
yertle:/ dshoop$ exit
logout
yertle:~ root# cd /
yertle:/ root# rsync -avE filesymlink filesymlink2
building file list ... done
filesymlink2 -> file
sent 88 bytes received 20 bytes 72.00 bytes/sec
total size is 4 speedup is 0.04
yertle:/ root# ls -als filesymlink
8 lrwxr-xr-x 1 dshoop admin 4 Jun 29 18:19 filesymlink -> file
yertle:/ root# ls -als filesymlink2
8 lrwxrwxrwx 1 dshoop admin 4 Jun 29 18:20 filesymlink2 -> file
--
-dhan
------------------------------------------------------------------------
Dan Shoop AIM: iWiring
Systems & Networks Architect http://www.ustsvs.com/
email@hidden http://www.iwiring.net/
1-714-363-1174
iWiring provides systems and networks support for Mac OS X, unix, and
Open Source application technologies at affordable rates.
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