pub unsafe fn stdin() -> BorrowedFd<'static>Expand description
STDIN_FILENO—Standard input, borrowed.
Safety
This function must be called from code which knows how the process’
standard input is being used. Often, this will be the main function or
code that knows its relationship with the main function.
The stdin file descriptor can be closed, potentially on other threads, in which case the file descriptor index value could be dynamically reused for other purposes, potentially on different threads.
Other hazards
Stdin could be redirected from arbitrary input sources, and unless one knows how the process’ standard input is being used, one could consume bytes that are expected to be consumed by other parts of the process.