[prev in list] [next in list] [prev in thread] [next in thread] 

List:       rsync
Subject:    Re: Can rsync write to a FIFO?
From:       Robin Lee Powell via rsync <rsync () lists ! samba ! org>
Date:       2023-02-11 18:43:14
Message-ID: Y+fhwpieOXgdjaE3 () gmail ! com
[Download RAW message or body]

Yeah, I was thinking tar, but it's effectively the same thing.

On Sat, Feb 11, 2023 at 07:14:57PM +0100, Hardy via rsync wrote:
> 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)
> > 
> 
> -- 
> Please use reply-all for most replies to avoid omitting the mailing list.
> To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync
> Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html

-- 
Please use reply-all for most replies to avoid omitting the mailing list.
To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync
Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html


[prev in list] [next in list] [prev in thread] [next in thread] 

Configure | About | News | Add a list | Sponsored by KoreLogic