Subject: [sup-talk] Backups ?

From: [email-masked] (Marc Weber)
Date: Tue, 7 Jul 2009 15:08:44 +0200

Hi, I'd like to setup an automatic backup system cause I don't want to
tag my mails twice and I don't want to loose the information about
archived mails etc.

What do you think about something like this?
Is it enough to keep 4 dumps?
What about moving this code into sup shutdown?
I think everyone wants to have this feature?

run_sup(){
  # untested draft
  local dump_dir="/var"
  sup
  sup-dump | bzip2 > "$dump_dir/sup-dumps-`date`"
  ls -1t "$dump_dir"/sup-dumps-* | { read; read; read; read; cat } | xargs rm
}

Marc Weber

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From: [email-masked] (wagnerdm at seas.upenn.edu)
Date: Tue, 07 Jul 2009 11:26:35 -0400

>   ls -1t "$dump_dir"/sup-dumps-* | { read; read; read; read; cat } | xargs rm

"{ read; read; read; read; cat }" could probably better be done as  
"tail +5"; makes it easier to adjust to people's choice of backup  
count, too. ;-)
- Daniel "Bikeshedder" Wagner

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From: [email-masked] (Ben Walton)
Date: Tue, 07 Jul 2009 12:10:42 -0400

> "tail +5"; makes it easier to adjust to people's choice of backup  

Or:

DAYS=5
find $dump_dir -mtime +${DAYS} -name "*sup-dumps-*" -print0 | xargs -0 --no-run-if-empty rm

(adjust xargs options to suit your environment...I don't think
--no-run-if-empty is all that portable.)

-Ben
-- 
Ben Walton
Systems Programmer - CHASS
University of Toronto
C:416.407.5610 | W:416.978.4302

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From: [email-masked] (Ingmar Vanhassel)
Date: Tue, 07 Jul 2009 18:19:14 +0200

> - Daniel "Bikeshedder" Wagner

"tail -n+5", which is POSIX compatible

-- 
Exherbo KDE, X.org maintainer