9.8.1 Variable managment

You can use variables in `dio87d' and `dio87d'. A variable is identified by a unique name and has a value which is a string.

For example, we will create three variables `var1', `var2' and `var3'. `var2' is created with an initial value : `a_value'.

$ dio87d -d
$ dio87d -d
$
$ dio87c vc
0
$ dio87c va var1
$ dio87c va var2 a_value
$ dio87c va var3
$ 
$ dio87c vc
3
$ dio87c -- vl -v
var1
var2     a_value
var3	

va command is used to create a new variable. The first parameter is the name of the variable. The second optional parameter is an initial value. vl is used to print variable list. `-v' option prints value of each variable.

You can use vsv command to change a variable value. For example, we will change the value of `var3' :

$ dio87c -- vl -v
var1
var2    a_value
var3
$
$ dio87c vsv var3 value_of_var3
$
$ dio87c -- vl -v
var1
var2    a_value
var3    value_of_var3
$

This variables are created in `dio87d' daemon because we used dio87c utility. But you can create variable in `dio87d' daemon with dio87c utility :

$ dio87c vc
0
$ dio87c va var1 
$ dio87c va var4
$ 
$ dio87c vc 
2
$ dio87c -- vl -v
var1	
var4	
$ dio87c -- vl -v
var1
var2     a_value
var3	
$ 

vk is used to delete a variable :

$ dio87c vl 
var1
var2
var3
$
$ dio87c vk var2
$
$ dio87c vl
var1
var3
$