[CentOS] Another Tar stopper

[Will McDonald]

On 12/09/06, Robert Moskowitz <rgm at htt-consult.com> wrote:
> Will McDonald wrote:
> > On 12/09/06, Ralph Angenendt <ra+centos at br-online.de> wrote:
> >> Will McDonald wrote:
> >> > I'd send STDOUT and STDERR to separate logs for brevity's sake.
> >> > Something like...
> >> >
> >> > tar czvf $destfile $tobetarred > /tmp/tarlog.std 2> /tmp/tarlog.err
> >>
> >> If you want to have it brief - why the "v"?
> >
> > Pedant. :)
> >
> > What I *meant* was then all the errors would be in one place, all the
> > standard messages in an other, which is kinda brevity.
> OK.  I used the following:
>
>
> tar -cpvzO / --exclude-from=/home/not-file 2>/tmp/tarlog.err | ssh
> user at ipaddrs "cat > backup.tgz"
>
>
> No messages went to the screen.  tarlog.err is 4Mb large.  Looked at it
> for error messages.
>
> NONE!  not even the one I was getting before routing stderr.out.  I did
> a the -l option, but that should not result in no error messages...
>
> So now what?
>
> Confused.

It appears when you tar to STDOUT it redirects the usual STDOUT
messages to STDERR, in addition to the errors, so I guess a separate
error log when tar-ing to STDOUT's out.

[wmcdonald at stella /]$ tar cpvzO /proc/ 1> /tmp/proc.stdout 2>/tmp/proc.stderr
[wmcdonald at stella /]$ file /tmp/proc.*
/tmp/proc.stderr: ASCII text
/tmp/proc.stdout: gzip compressed data, from Unix
[wmcdonald at stella /]$

Dropping the 'O' option and using - behaves the same...

[wmcdonald at stella /]$ tar cpvz - /proc/ 1> /tmp/proc.stdout 2>/tmp/proc.stderr
[wmcdonald at stella /]$ file /tmp/proc.*
/tmp/proc.stderr: ASCII text
/tmp/proc.stdout: gzip compressed data, from Unix

Will.