# the bootstrap Init currently exposes only io; macOS provides process-lifetime argv storage.
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_NSGetArgc c_func() @c_int

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_NSGetArgv c_func() @*[*;0]u8

argument_count proc() usize {
    return usize(_NSGetArgc()^)
}

#! returns a borrowed, zero-terminated argument; storage lasts for the process lifetime.
argument proc(index usize) ?[*;0]u8 {
    if (index >= argument_count()) return null
    return _NSGetArgv()^[index]
}