cfexecute

Description

Executes a ColdFusion developer-specified process on a server computer.

Syntax

<cfexecute 
   name = "application name"
   arguments = "command line arguments"
   outputFile = "output filename"
   variable = "variable name"
   timeout = "timeout interval">
   ...
</cfexecute>

History

ColdFusion MX 6.1:

Added the variable attribute.
Changed file path behavior for the outputFile attribute: if you do not specify an absolute file path in the outputFile attribute, the path is relative to the ColdFusion temporary directory.

Attributes

Attribute	Req/Opt	Default	Description
name	Required		Absolute path of the application to execute. On Windows, you must specify an extension; for example, C:\myapp.exe.
arguments	Optional		Command-line variables passed to application. If specified as string, it is processed as follows: Windows: passed to process control subsystem for parsing. UNIX: tokenized into an array of arguments. The default token separator is a space; you can delimit arguments that have embedded spaces with double-quotation marks. If passed as array, it is processed as follows: Windows: Elements are concatenated into a string of tokens, separated by spaces. Passed to process control subsystem for parsing. UNIX: Elements are copied into an array of exec() arguments.
outputFile	Optional		File to which to direct program output. If no `outputfile` or `variable` attribute is specified, output is displayed on the page from which it was called. If not an absolute path (starting a with a drive letter and a colon, or a forward or backward slash), it is relative to the ColdFusion temporary directory, which is returned by the `GetTempDirectory` function.
variable	Optional		Variable in which to put program output. If no `outputfile` or `variable` `attribute` is specified, output is displayed on page from which it was called.
timeout	Optional	0	Length of time, in seconds, that ColdFusion waits for output from the spawned program. 0: equivalent to nonblocking mode. A very high value: equivalent to blocking mode. If the value is 0: ColdFusion starts a process and returns immediately. ColdFusion may return control to the calling page before any program output displays. To ensure that program output displays, set the value to 2 or higher. If the `outputFile` attribute is not specified, any program output is discarded

Usage

Do not put other ColdFusion tags or functions between the start and end tags of cfexecute. You cannot nest cfexecute tags.

Exceptions

Throws the following exceptions:

If the application name is not found: java.io.IOException
If the effective user of the ColdFusion executing thread does not have permissions to execute the process: a security exception

The time out values must be between zero and the longest time out value supported by the operating system.

Example

<h3>cfexecute</h3>
<p>This example executes the Windows NT version of the netstat network 
monitoring program, and places its output in a file.

<cfexecute name = "C:\WinNT\System32\netstat.exe"
   arguments = "-e" 
   outputFile = "C:\Temp\output.txt"
   timeout = "1">
</cfexecute>

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