You are here: Start » Function Reference » Process » AvsFilter_Execute

AvsFilter_Execute

This is Filter Equivalent. This function may be present in generated code, but should not be used in hand-written code.

Header:	STD.h
Namespace:	avs

Executes a command using the system console.

Syntax

void avs::AvsFilter_Execute
(
	const atl::File& inCommand,
	const atl::Directory& inWorkingDirectory,
	int& outReturnCode,
	atl::String& outResult
)

Parameters

Name	Type	Default	Description
inCommand	const File&		System command to be executed.
inWorkingDirectory	const Directory&	\".\"	Working directory in which the command will be executed.
outReturnCode	int&		Return code of the executed command.
outResult	String&		Captured text data.

Description

Filter executes a command provided in inCommand.The command will be executed in a directory provided in inWorkingDirectory. The current working directory is stored and will be restored after execution.

Output outResult contains all the captured text during the execution of command.

Usually value 0 on output outReturnCode means that command was executed correctly.

Execution of the command blocks program execution until command execution is finished.

Examples

To get list of files on the C drive working directory should be set to C:\ and command should be set to dir. On Linux command ls should be used.

Remarks

During the command execution system console may appear. It could cause loss of the focus on the HMI form.

Usage of this filter is not recommended in AVL.

Errors

If an error occurred during the process execution a value -1 will be returned on outReturnCode.

List of possible exceptions:

Error type	Description
DomainError	Could not remember current working directory.
DomainError	Provided inWorkingDirectory is incorrect or not found. Path: provided working directory
DomainError	Provided inWorkingDirectory user provided directory is incorrect or not found.
RuntimeError	Could not return from working directory.