Re: Supressing dd output
In the last episode (Dec 24), Rolf G Nielsen said: > Noel Jones wrote: > > On Wed, Dec 23, 2009 at 10:19 PM, Rolf Nielsen wrote: > >> 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. > > > > Order matters. > > > > dd ... >/dev/null 2>&1 > > 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. > :) 2>/dev/null is really all you need, since dd only prints those info lines to stderr (stdout usually being used as its stream output unless of= is used) -- Dan Nelson dnel...@allantgroup.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: Supressing dd output
Noel Jones wrote: On Wed, Dec 23, 2009 at 10:19 PM, Rolf Nielsen 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 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: Supressing dd output
On Wed, Dec 23, 2009 at 10:19 PM, Rolf Nielsen 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 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Supressing dd output
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 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
