func golang.org/x/sys/unix.IoctlFileCloneRange
one use
golang.org/x/sys/unix (current package)
ioctl_linux.go#L81: func IoctlFileCloneRange(destFd int, value *FileCloneRange) error {
The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)