Reference Guide
Command Line Interface 19
File Input and Output Commands
Specify the input file using the -i=<filename> command,
where <filename> is the name of the input file. Specify the output file
input using the – o=<filename> command, where <filename> is the
name of the output file.
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 that displays the CCTK utility name and version along with the
message.