Returns the count of nested builtins, e.g. eval echo a
would have it set to 2.
Run the declare
builtin with the given arguments.
Disable a given list of builtins by name.
Enable a given list of builtins by name.
Handle builtin errors.
Run the local
builtin with the given arguments.
Register builtins into the internal list for use.
Run the set
builtin with the given arguments.
Get the sets of enabled and disabled shell builtins.
Run the shopt
builtin with the given arguments.
Run the source
builtin with the given arguments.