- Replace homegrown check for FIFO with S_ISFIFO. [1] - Check the status of the options before messing with it.
- Replace homegrown check for FIFO with S_ISFIFO. [1]
- Check the status of the options before messing with it.

Inspired by:	NetBSD [1]
Submitted by:	rdivacky
Tested with:	LTP

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