-o, -output-directory DIRECTORY: The directory to write the contents of the archive to. Defaults to the current directory.
-f, -force-overwrite: Always overwrite files when a file to be unpacked already exists on disk. By default, the program asks the user if possible, otherwise skips the file.
-r, -force-rename: Always rename files when a file to be unpacked already exists on disk.
-s, -force-skip: Always skip files when a file to be unpacked already exists on disk.
-d, -force-directory: Always create a containing directory for the contents of the unpacked archive. By default, a directory is created if there is more than one top-level file or folder.
-D, -no-directory: Never create a containing directory for the contents of the unpacked archive.
-p, -password PASSWORD: The password to use for decrypting protected archives.
-e, -encoding ENCODING: The encoding to use for filenames in the archive, when it is not known. If not specified, the program attempts to auto-detect the encoding used. Use "help" or "list" as the argument to give a listing of all supported encodings.
-E, -password-encoding ENCODING: The encoding to use for the password for the archive, when it is not known. If not specified, then either the encoding given by the -encoding option or the auto-detected encoding is used.
-i, -indexes: Instead of specifying the files to list as filenames or wildcard patterns, specify them as indexes, as output by lsar.
-nr, -no-recursion: Do not attempt to extract archives contained in other archives. For instance, when unpacking a .tar.gz file, only unpack the .tar file and not its contents.
-t, -copy-time: Copy the file modification time from the archive file to the containing directory, if one is created.
-k, -forks visible|hidden|skip: How to handle Mac OS resource forks. visible creates AppleDouble files with the extension ".rsrc", hidden creates AppleDouble files with the prefix "._", and skip discards all resource forks. Defaults to visible.
-q, -quiet: Run in quiet mode.
-v, -version: Print version and exit.
-h, -help: Display help information.