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Variables in unix

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# 1  
Old 01-18-2012
Variables in unix
Hi,

I have defined 2 variables in a ksh file something like below.

x=abc
y=x

Now, I want to get abc printed using y.

I have tried echo $"$y" and I am getting $x but where as I am expecting abc.
Please suggest.

(something like pointer pointer in C language)
# 2  
Old 01-18-2012
I think you are looking for something like this using eval:

Code:
#!/usr/dt/bin/dtksh

x=abc
y=x
eval z=\$${y}

print "x: $x"
print "y: $y"
print "z: $z"

# Prove the value of y has not changed:
print "\ny: $y"

exit 0

Output:
Code:
$ evaltest
x: abc
y: x
z: abc

y: x
$

eval scans the line twice, first replacing ${y} with it's value, 'x' so then z is equal to $x.
Last edited by gary_w; 01-18-2012 at 04:18 PM..
# 3  
Old 01-18-2012
Thanks for your reply!!! it works...
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