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ActiveTcl 8.5 Documentation


Tcl/Tk Documentation > TclCmd > source

Tcl/Tk Applications | Tcl Commands | Tk Commands | Tcl Library | Tk Library


source - Evaluate a file or resource as a Tcl script


source fileName
source -encoding encodingName fileName


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 end-of-file character for files is “\32” (^Z) for all platforms. The source command will read files up to this character. This restriction does not exist for the read or gets commands, allowing for files containing code and data segments (scripted documents). If you require a “^Z” in code for string comparison, you can use “\032” or “\u001a”, which will be safely substituted by the Tcl interpreter into “^Z”.

The -encoding option is used to specify the encoding of the data stored in fileName. When the -encoding option is omitted, the system encoding is assumed.


Run the script in the file foo.tcl and then the script in the file bar.tcl:
source foo.tcl
source bar.tcl
foreach scriptFile {foo.tcl bar.tcl} {
   source $scriptFile


file, cd, encoding, info


file, script
Copyright © 1995-1997 Roger E. Critchlow Jr. Copyright © 1993 The Regents of the University of California. Copyright © 1994-1996 Sun Microsystems, Inc. Copyright © 2000 Scriptics Corporation.