rsync - Apr 2005 - [Bug 2670] rsync does not support Solaris' doorfs

https://bugzilla.samba.org/show_bug.cgi?id=2670


wayned@samba.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
             Status|NEW                         |ASSIGNED




------- Additional Comments From wayned@samba.org  2005-04-29 12:42 -------
That's not a regular file.  Try the --devices option (running rsync as
root).

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https://bugzilla.samba.org/show_bug.cgi?id=2670





------- Additional Comments From zosh@ife.ee.ethz.ch  2005-05-02 00:26 -------
I run rsync as root with options -aHx, and according to the man page -a
implies -D (--devices). Character and block devices are copied correctly,
only the Solaris doorfs is skipped.

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------- Additional Comments From zosh@ife.ee.ethz.ch  2005-05-03 03:16 -------
I resaerched a bit and found this: The door fs, implemented under Solaris and
Linux, is a special file descriptor created by door_create. On this descriptor
sits an IPC structure that provides a fast IPC between processes on the same
box.

It makes IMO little sense to copy such descriptors because exist only as long
as the calling process exists. I could neither mv, cp or mknod them.

Therefore I propose the following for rsync:
- rsync acknowledges that there is a doorfs but does not copy such descriptors.
- the man page and other doc stuff is amended according to this.
- rsync skips door descriptors silently unless the verbosity level is high
  enough to report it.
- configure checks for door.h. If it is present a HAS_DOORFS is set in config.h
- The code is changed so that it ignores (and maybe reports) door descriptors
  inside "#ifdef DOORFS ... #endif" clauses

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