[TriLUG] bash question

[Andrew Ball]

Closer ...

adball at adball-cs:~$ $("echo foo | $cmd")
Usage: command-not-found [options] <command-name>

command-not-found: error: no such option: -v
bash: echo foo |  | grep -v one | grep -v two | grep -v three: command not
found
adball at adball-cs:~$ echo $cmd
| grep -v one | grep -v two | grep -v three
adball at adball-cs:~$

Peace,
Andrew

On 10/17/07, Joseph Mack NA3T <jmack at wm7d.net> wrote:
>
> On Wed, 17 Oct 2007, Andrew Ball wrote:
>
> > Would something like the following do ?
>
> adball at adball-cs:~$ cmd=""
> adball at adball-cs:~$ for e in $exclude
> > do
> >   cmd="$cmd | grep -v $e"
> >   echo "e: [$e] cmd: [$cmd]"
> >
> > done
> e: [one] cmd: [ | grep -v one]
> e: [two] cmd: [ | grep -v one | grep -v two]
> e: [three] cmd: [ | grep -v one | grep -v two | grep -v three]
> adball at adball-cs:~$ echo $exclude
> one two three
> adball at adball-cs:~$
>
> I can construct $cmd this way, but when bash executes it,
> bash finds '|' and not | and sees '|' as a filename and not
> a pipe symbol. Did you get your line to execute?
>
> Thanks
> Joe
>
> --
> Joseph Mack NA3T EME(B,D), FM05lw North Carolina
> jmack (at) wm7d (dot) net - azimuthal equidistant map
> generator at http://www.wm7d.net/azproj.shtml
> Homepage http://www.austintek.com/ It's GNU/Linux!
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Andrew D. Ball
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