Avaya Writing Technician Interface Scripts Manuel d'utilisateur télécharger pdf (Page 19)

Creating a Script File

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To prevent a variable from being expanded, enter two dollar signs ($$) before the

variable name, as shown in the following example:

setenv a blue

setenv b “My color is \$a”

echo $$b

My color is $a

appears on the user’s console.

You may embed variables in quoted strings, as shown in the previous example.

The following command line encloses the variable names

a and b in braces ({ }) to

separate the variable names from other data within the string.

echo “The sum of ${a}+1=${b}”

A variable name is usually a literal string of characters preceded by a dollar sign

($). The variable name can also be “built” dynamically when the script is executed

by using a combination of literal text and the text stored in other variables.

For example, if you have a variable named array_10, you can reference this

variable by entering

$array_10 on a command line. You can build this same

variable name by concatenating the text strings

array_ and 10. For example, if you

assign the variable index the value 10, using the command

let index = 10, then

you can build the variable name array_10 dynamically on the command line using

the following syntax:

${array_[$index]}. Notice the use of the brackets ([ ]) within

the variable name. Any literal text or variable name specified within the brackets

is first expanded to replace any variables with their values and then concatenated

onto the preceding characters of the variable name. To use brackets, you must

enclose the entire variable name being built within braces (

{ }).

Note:

If the variable name is followed by a space or an end-of-line character

(carriage return), the brackets are optional.

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Avaya Writing Technician Interface Scripts Manuel d'utilisateur Page 19