function::ulong_arg - Linux


ulong_arg command is an argument parsing utility that simplifies handling 64-bit unsigned integer arguments in Linux scripts or C/C++ programs. It provides a cross-platform and robust solution for parsing unsigned long arguments, ensuring consistent behavior across different systems and compilers.


ulong_arg [--default <value>] [--help] [--version] [--long-option <value>] [--short-option <value>] [--value]


–default : Specifies the default value for the parsed argument.

–help: Displays help and usage information.

–version: Outputs the version number of ulong_arg.

–long-option : Parses an unsigned long argument with the given long option name.

–short-option : Parses an unsigned long argument with the given short option name.

–value: Parses the first remaining non-option argument as an unsigned long.


Simple Usage:

ulong_arg --value

Parsing with Options:

ulong_arg --long-option input_file --value

Setting Default Value:

ulong_arg --default 42 --value

Common Issues

  • Ensure that the provided argument is a valid unsigned long integer.
  • Use --default to handle cases where no argument is provided.
  • Check the return code of ulong_arg to verify successful parsing.


ulong_arg can be used in combination with other commands or tools to process unsigned long arguments consistently. For example:

# Parse an unsigned long argument and store in variable
input_size=$(ulong_arg --value)

# Pass parsed argument to another command
command_name "$input_size"

Related Commands

  • argparse: A Python library for parsing arguments from the command line.
  • getopt: A C library function for parsing command line options.