Reference Guide

Log Files

The -l=<filename> or --logfile=<filename> option records information output on the command line to

the specified log file.

If the log file already exists, information is appended to the file. This allows multiple tools to use the same log file to

record information. Use this option to record the output of a utility.

The log duplicates all standard output and error information to the specified file. Each log file begins with a time stamp

and utility name. For example:

YYYY/MM/DD HH:MM:SS <utilname> - <output text>

The following is an example of the logging behavior:

2010/05/16 10:23:17 cctk - option1=on

2010/05/16 10:23:17 cctk - option2=on

2010/05/16 10:23:17 cctk - option3=off

Error Checking And Error Messages

The CCTK utilities check your commands for correct syntax when you enter them. Unrecognized or invalid options and

arguments result in a usage error message that displays the CCTK utility name, version, and the list of CCTK options.