You cannot retry close(). Quoting from https://man7.org/linux/man-pages/man2/close.2.html#NOTES https://man7.org/linux/man-pages/man2/close.2.html#NOTES

You cannot retry close(). Quoting from https://man7.org/linux/man-pages/man2/close.2.html#NOTES https://man7.org/linux/man-pages/man2/close.2.html#NOTES Retrying the close() after a failure return is the wrong thing to do, since this may cause a reused file descriptor from another thread to be closed. This can occur because the Linux kernel always releases the file descriptor early in the close operation, freeing it for reuse; the steps that may return an error, such as flushing data to the filesystem or device, occur only later in the close operation. That is, once you call close(), the file descriptor is always freed (even if close() returns an error), and can be reused for an open() or similar in another thread. Retrying the close() will fail with EBADF in the best case, and close something another thread has opened in the worst case.