Is F15 unbackuppable? (RemoveSETUID)

[Roberto Ragusa]

On 06/05/2011 12:32 PM, Ralf Ertzinger wrote:
> Hi.
> 
> On Sun, 05 Jun 2011 11:39:02 +0200, Roberto Ragusa wrote
> 
>> - rsync -a                FAILS!
> 
> rsync supports -X (for xattr) and -A (for ACLs), both must be
> given explicitly.

Thanks, rsync -X actually works (and I wonder why -X is not included
in -a, just as for cp).

I see tar has --xattrs. With tar -c it works (the tar file contains the
string with the value), but tar -x does not recreate the xattr.

By using strace I see that rsync does

  open(".a.eWMgCy", O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0600) = 1
  fchmod(1, 0700)             = 0
  close(1)                    = 0
  lstat64(".a.eWMgCy", {st_mode=S_IFREG|0700, st_size=0, ...}) = 0
  llistxattr(".a.eWMgCy", 0x82bb0c0, 1024) = 0
  lsetxattr(".a.eWMgCy", "security.capability", "\x01\x00\x00\x02\x00 \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 20, 0) = 0
  lsetxattr(".a.eWMgCy", "user.qqq", "www", 3, 0) = 0
  utimensat(AT_FDCWD, ".a.eWMgCy", {UTIME_NOW, {1307265135, 0}}, AT_SYMLINK_NOFOLLOW) = 0
  chmod(".a.eWMgCy", 0755)    = 0
  rename(".a.eWMgCy", "a")    = 0

while tar -x does

  mknod("a", 0700)                        = 0
  setxattr("a", "user.qqq", "www", 3, 0)  = 0
  open("a", O_WRONLY|O_CREAT|O_LARGEFILE, 0700) = 4
  close(4)                                = 0
  utimensat(AT_FDCWD, "a", {{1307271119, 468295223}, {1307265135, 0}}, 0) = 0
  setxattr("a", "user.qqq", "www", 3, 0)  = 0
  chown32("a", 0, 0)                      = 0
  chmod("a", 0755)                        = 0

Why is tar not working? ("getcap a" prints nothing)

-- 
   Roberto Ragusa    mail at robertoragusa.it