//go:build unix

package archive

import (
	"io/fs"
	"syscall"
)

// openNonblock keeps an open of a FIFO swapped in after the walk from
// waiting for a writer; a regular file ignores it.
const openNonblock = syscall.O_NONBLOCK

// linkCount is a file's number of names (st_nlink).
func linkCount(fi fs.FileInfo) uint64 {
	if st, ok := fi.Sys().(*syscall.Stat_t); ok {
		return uint64(st.Nlink)
	}
	return 1
}