...

OS

Task Configuration

Scenario/Description

Linux

Scenario:

Based

Execution of an ls command.

Task instance success or failure depends on the exit code of the command

, the task instance is executed with success or failure

being executed. If the command is executed with exit code = 0, the

default behavior is that the Task Instance FAILED status is

task instance completes with Success status. Otherwise, the task instance status is Failed with exit code = 1.

This example shows the execution of

the

an ls command, including outputs for both success and failure cases.

Code Block

language	js
title	Extension Output when File exists
linenumbers	true
collapse	true

{
	"exit_code": 0,
	"status_description": "Task executed successfully",
	"invocation": {
		"extension": "ue-cmd",
		"version": "1.0.0",
		"fields": { ... }
	},
	"result": {
		"metadata": {
			"runtime_directory": "/tmp",
			"command": "ls existing_file.txt",
			"exit_code": 0
		},
		"command_json_output": "existing_file.txt"
	}
}

Code Block

language	js
title	Extension Output when File does not exists
linenumbers	true
collapse	true

{
	"exit_code": 1,
	"status_description": "Execution returned exit code other than 0",
	"invocation": {
		"extension": "ue-cmd",
		"version": "1.0.0",
		"fields": { ... }
	},
	"result": {
		"metadata": {
			"runtime_directory": "/tmp",
			"command": "ls non_existent.txt",
			"exit_code": 2
		},
		"command_json_output": null
	}
}

Linux

Scenario: Command execution that produces a valid JSON result:.

This example shows a command that produces JSON output on STDOUT. In such a case, the output is also visible in the task instance EXTENSION output.

Code Block

title	Extension Output containing JSON object
linenumbers	true
collapse	true

{
	"exit_code": 0,
	"status_description": "Task executed successfully",
	"invocation": {
		"extension": "ue-cmd",
		"version": "1.0.0",
		"fields": {
			"action": "Run Command",
			"command": "echo '{\"name\": \"John\", \"age\": 30, \"city\": \"Athens\"}'",
			"additional_file": null
		}
	},
	"result": {
		"metadata": {
			"runtime_directory": "/tmp",
			"command": "echo '{\"name\": \"John\", \"age\": 30, \"city\": \"Athens\"}'",
			"exit_code": 0
		},
		"command_json_output": {
			"name": "John",
			"age": 30,
			"city": "Athens"
		}
	}
}

Linux

Scenario: Execution of a shell script stored in the Controller.

The example shows execution of script.sh. Environment variable ${UE_CMD_ADDFILE} points to the script full path referenced from Optional Additional File field.

Note: In this example, the reference to the environmental variable UE_CMD_ADDFILE is surrounded by quotes. This was done because the path to this variable contains spaces, so it must be quoted in order for the shell to resolve it correctly.

Linux

Scenario: Conditional execution of commands.

This example shows a scenario that depends on the result of grep. If there is a pattern match, a success message is displayed; otherwise, an error message is printed to indicate the pattern wasn't found.

Linux

Scenario: Command Stacking.

This example shows multiple commands being executed:

execute a shell script provided in the Optional Additional File field
pause for 2 seconds
print a message indicating that execution has completed.

Linux

Scenario: Redirection of output.

In this example, the contents of the current directory are listed in long format using ls -l, and then redirected to the output.log file. Afterwards, the contents are displayed through the cat command.

Windows

Scenario: PowerShell script execution.

The example shows execution of a PowerShell script provided by the Optional Additional File field referenced through the UE_CMD_ADDFILE environment variable.

Info
PowerShell can execute scripts when related execution policy is granted. For more information, refer to the official Microsoft website.

Info
PowerShell Scripts need to be saved with a .ps1 extension.

Windows

Scenario: Execution of a batch file.

The example shows execution of a batch file provided by the Optional Additional File field referenced through the UE_CMD_ADDFILE environment variable.

Info
Batch Scripts need to be saved with a .bat extension.

...

Field	Type	Description	Version Information
Action	Choice	The action performed upon the task execution. Available options: Run Command	Introduced in 1.0.0
Optional Additional File	Script	A An optional field to include a file used either as a parameter in the command or as a script to be executed with an interpreter. This file can be referenced in the command line using the UE_CMD_ADDFILE environment variable. This field is particularly useful when the required files are not present on the agent’s filesystem, allowing the Controller to serve as the source for these files.	Introduced in 1.0.0
Command	Large Text	The Command Line to be executed. It should be provided as a single line. Any additional lines will be ignored. Environment variable UC_CMD_ADDFILE can be used here to reference the additional file provided. Required when Action is “Run Command”	Introduced in 1.0.0
Runtime Directory	Text	The Runtime Directory just before the execution of the command. While the Runtime Directory field is not mandatory, it is highly recommended to be configured. This ensures clarity about the directory from which the command is executed	Introduced in 1.0.0

...

Exit Code	Status	Status Description	Meaning
0	Success	“Task executed successfully. “	Exit code for successful executionIf the executed command succeeds, it returns an exit code of 0. The task will reflect this success by also returning exit code = 0.
1	Failure	““Execution Failed: <<Error Description>>”	Exit code for failed executionThis indicates that the executed command failed, or the task itself failed for some other reason.
20	Failure	“Data Validation Error: <<Error Description>> “	Input fields validation error.

...

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