Safeguard for Sudo 2.0 - Administrators Guide

Syntax

while ( expression ) statement

Description

The while statement is a looping statement. It repeatedly executes the specified statement while the specified expression evaluates to true (any non-zero value). The while statement terminates when the specified expression evaluates to false (the value 0) or it encounters a break statement.

Use a statement block in the form { statement ... } to execute multiple statements in the loop. Quest recommends using a statement block for readability.

Examples

This prints the values 1,2,3,4,5:

x = 1; 
while (x <= 5) print(x++);

This prints the values 1,2,3,4,5 and uses a statement block:

x = 1; 
while (x <= 5) { 
   print(x); 
   x++; 
}

This prints the values 1,2,3 because the break statement terminates the loop:

x=1; 
while (x <= 5) { 
   if (x > 3) break; 
   print(x++); 
}

Syntax

string getenv ( string name [, string value] )

Description

getenv returns the value of the specified environment variable from the runenv variable.

Example

# print the value of HOME if defined, otherwise print "none" 
print(getenv("HOME", "none")); 

Related Topics

keepenv

setenv

unsetenv