redhat man page for source

source(n)						       Tcl Built-In Commands							 source(n)

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NAME
       source - Evaluate a file or resource as a Tcl script

SYNOPSIS
       source fileName

       source -rsrc resourceName ?fileName?

       source -rsrcid resourceId ?fileName?
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DESCRIPTION
       This  command takes the contents of the specified file or resource and passes it to the Tcl interpreter as a text script.  The return value
       from source is the return value of the last command executed in the script.  If an error occurs in evaluating the contents  of  the  script
       then  the source command will return that error.  If a return command is invoked from within the script then the remainder of the file will
       be skipped and the source command will return normally with the result from the return command.

       The -rsrc and -rsrcid forms of this command are only available on Macintosh computers.  These versions of the command allow you to source a
       script from a TEXT resource.  You may specify what TEXT resource to source by either name or id.  By default Tcl searches all open resource
       files, which include the current application and any loaded C extensions.  Alternatively, you may  specify  the	fileName  where  the  TEXT
       resource can be found.

KEYWORDS
       file, script

Tcl																	 source(n)