Date: Thu, 24 Dec 2009 05:44:58 +0100 From: Rolf G Nielsen <lazlar@lazlarlyricon.com> To: Noel Jones <noeldude@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Supressing dd output Message-ID: <4B32F1CA.8000500@lazlarlyricon.com> In-Reply-To: <cce506b0912232032v568ec1bdo2c1928e60430f3e3@mail.gmail.com> References: <4B32EBDB.1090808@lazlarlyricon.com> <cce506b0912232032v568ec1bdo2c1928e60430f3e3@mail.gmail.com>
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Noel Jones wrote: > On Wed, Dec 23, 2009 at 10:19 PM, Rolf Nielsen > <listreader@lazlarlyricon.com> wrote: >> Hello everyone, >> >> I'm wondering if there's a way to supress the summary output from dd. I'm >> working on a backup script, that encrypts the backups, and after encrypting >> overwrites the unencrypted file several times using dd. I've tried to >> redirect the output with 2>&1 > /dev/null but it doesn't work. Since I run >> the script from the daily_local variable in periodic.conf, and the script >> backs up 11 filsystems (ZFS) to separate files, the mail from periodic daily >> gets ridiculously long, and most of it being dd summaries. >> >> I guess I could hack the source code of dd, but I'd prefer not to have to. >> Has anyone got any ideas? >> >> Thanks in advance and Merry Christmas to all of you, >> >> Rolf Nielsen > > > Order matters. > > dd ... >/dev/null 2>&1 > > > -- Noel Jones Thanks Noel. I've never considered using that order before. Probably because first time I saw that construct and had it explained to me, it was ordered the way I had it, and I very rarely have any use for it, so I haven't really noticed that my way was wrong; I usually only redirect stdout if anything at all. Anyway, now it works like a charm. Thanks. :) Rolf Nielsen
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