Can rsync write to a FIFO?

[Hardy]

If this helps, in old days I used to use cpio for a similar thing.

I do not want to spam you with my whole script, but willing to share if you want. I think you will get the hang of it by the following snippet. (Get yourself man-knowledge about the -i -o -p mechanism of cpio and the use of dd.) This was in the good (?) old days when rsh worked as simple (and insecure) as this. In modern *n*x like systems rsh is a link to ssh, which is (besides being entirely wrong!) a pitfall to finding correct cli arguments. But it is manageable if you are aware of it.

CPIOP = parameter arguments to cpio
/tmp/$$.f = list of files

Snippet:

case $CPIOP in
   -i*) rsh -l $RUSER $RHOST dd if=$RDEV | cpio $CPIOP
         ;;
   -o*)
         cpio $CPIOP </tmp/$$.f | rsh -l $RUSER $RHOST dd of=$RDEV
         ;;
   -p)
         cpio -ocv </tmp/$$.f | rsh -l $RUSER $RHOST cpio -icmd
         ;;
   *)	echo argument mismatch $CPIOP >&2
	exit
	;;
esac

Hope this gives an idea

Hardy

Am 10.02.23 um 10:31 schrieb Chris Green via rsync:
> I have searched a little and read the man page but I can't really find
> a good definite answer to this.
> 
> Can rsync write to a FIFO?  Obviously one needs the --inplace to do
> this, does one also need --write-devices?
> 
> It would be very handy if one can do this, to use as a simple message
> passing mechanism.  Write something to a file on system A and rsync it
> to a FIFO on system B where there is a simple script reading the FIFO.
> The script gets the contents of the file every time it's written.
> 
> (this is all within a LAN behind a reasonably secure firewall)
>