I need to read and write the positional parameters $@ of a function's caller. The Bash man page says that:A shell function is an object that is called like a simple command and  executes a compound command with a new set of positional parametersSo $@ is rewritten at every call. I looked for some special parameter but found nothing. The shell variable BASH_ARGV seems to solve my problem, however it requires shopt -s extdebug enabled, what isn't the default behavior in my machine neither looks like a option to turn on in production.extdebug    If set, behavior intended for use by debuggers is enabled:    ...    4.     BASH_ARGC and BASH_ARGV are updated as described in their           descriptions above.    ...Is Bash capable of read or write a function's caller $@ without BASH_ARGV? Do you think that Bash is limited and use another shell for scripting?Edit: I want a fancy getopt wrapper inside my helper library. So all behavior related to it goes inside a function. No need to check errors or set --.
Function caller positional parameters
bash;shell;parameter;function;shopt