Messages in this thread | | | From | Paolo Giarrusso <> | Date | Thu, 13 Sep 2012 23:26:01 +0200 | Subject | Linux hfsplus corrupts chflags bits? |
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[Please CC me on replies as I'm not subscribed.]
The Linux hfsplus implementation seems to repeatedly corrupt hfsplus_perm->rootflags; when the same filesystem is read on Mac OS X, this changes the attribs touched by chflags and makes a random selection of files "locked" and thus untouchable. This happened for me on Ubuntu 12.04 "Precise Pangolin", based on a 3.2.0 kernel, reports appear from various other versions and the source doesn't seem heavily changed.
I've had experience of this, shared by other users on this superuser.com discussion: http://superuser.com/a/457494/46794
Given that hfsplus isn't even mentioned in MAINTAINERS, I've used ./scripts/get_maintainer.pl to select recipients.
To convince you that the flags are in fact set randomly, here's a listing of the backup of my home created through rsync on Linux (which supposedly isn't even aware of these flags). Notice: none of these flags are supposed to be set.
# 'ls' -ld -O /Volumes/HFS+Backup/Users/pgiarrusso/* drwx------ 31 pgiarrusso staff uchg,nodump,opaque 1054 Aug 13 02:00 /Volumes/HFS+Backup/Users/pgiarrusso/Desktop drwx------ 36 pgiarrusso staff nodump 1224 Jul 22 16:04 /Volumes/HFS+Backup/Users/pgiarrusso/Documents drwx------ 108 pgiarrusso staff uappnd 3672 Aug 13 11:43 /Volumes/HFS+Backup/Users/pgiarrusso/Downloads drwx------ 13 pgiarrusso staff uappnd,uchg,opaque 442 Jul 22 05:04 /Volumes/HFS+Backup/Users/pgiarrusso/Dropbox drwx------ 53 pgiarrusso staff - 1802 Aug 12 00:58 /Volumes/HFS+Backup/Users/pgiarrusso/Library drwx------ 11 pgiarrusso staff uchg,nodump,opaque 374 Jul 22 17:25 /Volumes/HFS+Backup/Users/pgiarrusso/Movies drwx------ 13 pgiarrusso staff uappnd,uchg,nodump 442 Jun 10 12:05 /Volumes/HFS+Backup/Users/pgiarrusso/Music drwx------ 15 pgiarrusso staff uappnd,nodump,opaque 510 Jun 10 12:05 /Volumes/HFS+Backup/Users/pgiarrusso/Pictures drwxr-x--- 11 pgiarrusso staff opaque 374 Jul 6 15:33 /Volumes/HFS+Backup/Users/pgiarrusso/Public drwxr-xr-x 34 pgiarrusso staff uappnd,uchg,opaque 1156 May 27 12:39 /Volumes/HFS+Backup/Users/pgiarrusso/Sites drwxr-xr-x 2 pgiarrusso staff uappnd,nodump,opaque 68 Jun 10 21:43 /Volumes/HFS+Backup/Users/pgiarrusso/VirtualBox VMs -rwxr-xr-x 1 pgiarrusso staff uappnd,nodump,opaque 1703 Feb 19 2012 /Volumes/HFS+Backup/Users/pgiarrusso/bash-prompt.sh drwxr-xr-x 22 pgiarrusso staff - 748 Aug 10 19:47 /Volumes/HFS+Backup/Users/pgiarrusso/bin lrwxrwxrwx 1 pgiarrusso staff nodump,opaque 37 Sep 27 2011 /Volumes/HFS+Backup/Users/pgiarrusso/default.sfx -> /Users/pgiarrusso/opt/rar/default.sfx -rw-r--r-- 1 pgiarrusso staff uappnd,uchg 1375563169 Aug 2 18:52 /Volumes/HFS+Backup/Users/pgiarrusso/heapdump-1343925310626.hprof drwxr-xr-x 22 pgiarrusso staff uappnd,nodump 748 Aug 1 22:15 /Volumes/HFS+Backup/Users/pgiarrusso/opt drwxr-xr-x 7 pgiarrusso staff uappnd 238 Apr 19 20:00 /Volumes/HFS+Backup/Users/pgiarrusso/share drwxr-xr-x 35 pgiarrusso staff nodump,opaque 1190 Aug 10 00:06 /Volumes/HFS+Backup/Users/pgiarrusso/tmp
Cheers, -- Paolo 'Blaisorblade' Giarrusso - Ph.D. Student http://www.informatik.uni-marburg.de/~pgiarrusso/
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