tldr/pages/linux/getopt.md

getopt

Parse command line arguments. More information: https://www.gnu.org/software/libc/manual/html_node/Getopt.html.

• Parse optional verbose/version flags with shorthands:

getopt -o vV --longoptions verbose,version -- --version --verbose

• Add a --file option with a required argument with shorthand -f:

getopt -o f: --longoptions file: -- --file=somefile

• Add a --verbose option with an optional argument with shorthand -v, and pass a non-option parameter arg:

getopt -o v:: --longoptions verbose:: -- --verbose arg

• Accept a -r and --verbose flag, a --accept option with an optional argument and add a --target with a required argument option with shorthands:

getopt -o rv::s::t: --longoptions verbose,source::,target: -- -v --target target