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|A Tinderbox Reference File : Actions & Rules : Invoke command line scripts in action code||aTbRef Site Map|
Invoke command line scripts in action code
Actions may invoke command-line scripts. The action
runs the command
and copies its standard output to the user string attribute MyString.
The command is interpreted by /bin/sh.
The ` operator is not handled as a conventional unary operator, like negate (-). Tinderbox will do full variable interpolation, and the command may be assembled from other attributes and references:
So, the ` operator applies to everything up to the succeeding semicolon or the end of the command.
The command may thus contain spaces. The command begins with the first non-white-space character following the `, and continues to the first semicolon. For example:
Attribute interpolation is applied to the entire command line
$Delivered=`myQuery $TrackingID $UserName(parent)
If you need to include the $ character in a command, escape it with backslash.
Interpolated attribute names are terminated when Tinderbox reaches the end of the command, a character that can't be part of an attribute name (e.g. white space), or a second $. Thus, if $AccountNumber holds the string "3716",
would create the command:
An alternate way to access command lines is to use the runCommand() operator. From v4.6 this also benefits from not requiring a left side to the expression.
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