3 Common command-line options

Certain options, and regular expression syntax, are shared by various groupings of the ID utilities. We describe these in the sections below, rather than repeating them for each program.

• Universal options: Options common to all programs.
• Extraction options: Options for programs that extract tokens from source files.
• Walker options: Options for programs that walk file and directory trees.
• Reading options: Options for programs that read ID databases.
• Writing options: Options for programs that write ID databases.
• File listing options: Options for programs that list file names.