Hi,
It is a newbie general question. I want to redirect the result of bdf (or
df -k) in a
file.

I tried this.
[%] echo $SHELL
ksh
[%] bdf > toto ; bdf | tee toto ; bdf 2>toto

My Pb is that size of toto is always 0
Why ? How to redirect bdf output into toto file ?
Thanks

On 2006-11-07, YAB wrote:
> Hi,
> It is a newbie general question. I want to redirect the result of bdf (or
> df -k) in a
> file.
>
> I tried this.
> [%] echo $SHELL
> ksh
> [%] bdf > toto ; bdf | tee toto ; bdf 2>toto
>
> My Pb is that size of toto is always 0
> Why ? How to redirect bdf output into toto file ?

All of those should work. What is the output of bdf without any
redirection?

Post the output of:

bdf | tee toto
ls -l toto

--
Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell>
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
===== My code in this post, if any, assumes the POSIX locale
===== and is released under the GNU General Public Licence

On Wed, 8 Nov 2006 00:50:41 +0100, YAB
<yhab.abiad@orange.fr> wrote:
> Hi,
> It is a newbie general question. I want to redirect the result of bdf (or
> df -k) in a
> file.
>
> I tried this.
> [%] echo $SHELL
> ksh
> [%] bdf > toto ; bdf | tee toto ; bdf 2>toto
>
Each command erases the previous content of toto. Try using >> instead
of >, and "tee -a". Or you could use
bdf > toto 2>&1


--
meterologist, n.:
One who doubts the established fact that it is
bound to rain if you forget your umbrella.

Of course, I've executed commands seperatly and after each command I've run
ls -l
bdf => gives a correct standard output
bdf > toto => then ls -l toto prints 0 length for toto
and so on for other commands (bdf | tee toto).

All your answers confirm that there is no syntax error with my command.
I'll try with bdf >> toto and with bdf | tee -a toto
I'll check also if there is a quota limit with my account.

Many thanks for your answers.

"Bill Marcum" <bmarcum@iglou.com> a écrit dans le message de
news:3h5824-989.ln1@don.localnet...
> On Wed, 8 Nov 2006 00:50:41 +0100, YAB
> <yhab.abiad@orange.fr> wrote:
> > Hi,
> > It is a newbie general question. I want to redirect the result of bdf
(or
> > df -k) in a
> > file.
> >
> > I tried this.
> > [%] echo $SHELL
> > ksh
> > [%] bdf > toto ; bdf | tee toto ; bdf 2>toto
> >
> Each command erases the previous content of toto. Try using >> instead
> of >, and "tee -a". Or you could use
> bdf > toto 2>&1
>
>
> --
> meterologist, n.:
> One who doubts the established fact that it is
> bound to rain if you forget your umbrella.

YAB wrote:

> Hi,
> It is a newbie general question. I want to redirect the result of bdf (or
> df -k) in a
> file.
>
> I tried this.
> [%] echo $SHELL
> ksh
> [%] bdf > toto ; bdf | tee toto ; bdf 2>toto
^^^^^^^^^^
this last command is the only one that matters
it must be that the bdf command produces no output on stderr

> My Pb is that size of toto is always 0
> Why ?

the shell is redirecting stderr output from bdf to file toto

we know that toto is overwritten before bdf is executed (the
techincal term is truncated) which is just a natural consequence
of how shell redirection works

but since bdf produces no output on stderr, nothing is ever
written to toto, thus toto remains at 0 bytes

> How to redirect bdf output into toto file ?

bdf > toto # overwrite contents of toto
bdf >> toto # append to contents to toto


--
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