Pouziti eval

[Martin 'Goran' Moravec]

> >
> > >  A chci vyhodnotit obsah promene VYPIS do jine promene jako vlastrni
> > > retezec, abych mohl pouzit
> > > tuto promenou ve forme "$VYPIS".
> >
> > Nerozumim.
> >
> >
Ani ja ne:

cat test
#!/bin/bash
VYPIS=`cat /etc/apache/httpd.conf | grep Port | cut -c80-88`
echo VYPIS=$VYPIS

VYPIS2='cat /etc/apache/httpd.conf | grep Port | cut -c80-88'
echo VYPIS2=$VYPIS2

VYPIS2=`eval $VYPIS2`
echo VYPIS3=$VYPIS3

./test
VYPIS=
VYPIS2=cat /etc/apache/httpd.conf | grep Port | cut -c80-88
VYPIS3=



> 
> Pokud pouziji tu promenou ted v tomto spojeni vyhodnoti se mi retezec tak, ze
> v jine promenne
> je 'cat $soubor | grep neco | cut -c80-88' a ja potrebuji, aby v tge jine
> promenne byl vysledek teto operace, ktera je ulozena v promenne $VYPIS.
> 
>                               Mikulas Gangur
> 

-- 
--
    A novice was trying to fix a broken lisp machine by turning the
power off and on.  Knight, seeing what the student was doing spoke sternly,
"You cannot fix a machine by just power-cycling it with no understanding
of what is going wrong."  Knight turned the machine off and on.  The
machine worked.			
--					Just another from of life
						Goran