//go:build aix || dragonfly || freebsd || linux || netbsd || openbsd

package unix

// ReadDirent reads directory entries from fd and writes them into buf.
func ReadDirent(fd int, buf []byte) (n int, err error) {
	return Getdents(fd, buf)

	}
	sa, err = anyToSockaddr(&rsa)
	if err != nil {
		Close(nfd)
		nfd = 0
	}
	return
}

//sys getdents(fd int, buf []byte) (n int, err error)

func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
	return getdents(fd, buf)
}

// TODO, see golang.org/issue/5847
func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {

	}
	sa, err = anyToSockaddr(&rsa)
	if err != nil {
		Close(nfd)
		nfd = 0
	}
	return
}

//sys getdents(fd int, buf []byte) (n int, err error)

func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
	return getdents(fd, buf)
}

// TODO, see golang.org/issue/5847
func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {

	var pp [2]_C_int
	err := pipe2(&pp, flags)
	if err == nil {
		p[0] = int(pp[0])
		p[1] = int(pp[1])
	}
	return err
}

//sys	Getdents(fd int, buf []byte) (n int, err error)

func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
	n, err = Getdents(fd, buf)
	if err != nil || basep == nil {
		return
	}

	var off int64
	off, err = Seek(fd, 0, 1 /* SEEK_CUR */)
	if err != nil {

	}
	var pp [2]_C_int
	err := pipe2(&pp, flags)
	if err == nil {
		p[0] = int(pp[0])
		p[1] = int(pp[1])
	}
	return err
}

//sys	Getdents(fd int, buf []byte) (n int, err error)

func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
	n, err = Getdents(fd, buf)
	if err != nil || basep == nil {
		return
	}

	var off int64
	off, err = Seek(fd, 0, 1 /* SEEK_CUR */)
	if err != nil {

}

func ReadDirent(fd int, buf []byte) (n int, err error) {
	// Final argument is (basep *uintptr) and the syscall doesn't take nil.
	// TODO(rsc): Can we use a single global basep for all calls?
	return Getdents(fd, buf, new(uintptr))
}

// Wait status is 7 bits at bottom, either 0 (exited),
// 0x7F (stopped), or a signal number that caused an exit.
// The 0x80 bit is whether there was a core dump.

	}

	return nil
}

// The buffer must be at least a block long.
// refer https://github.com/golang/go/issues/24015
const blockSize = 8 << 10 // 8192

// By default at least 128 entries in single getdents call (1MiB buffer)
var (
	direntPool = sync.Pool{
		New: func() interface{} {
			buf := make([]byte, blockSize*128)
			return &buf
		},
	}

	direntNamePool = sync.Pool{

//sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
//sys	Fstatfs(fd int, stat *Statfs_t) (err error)
//sys	Fsync(fd int) (err error)
//sys	Ftruncate(fd int, length int64) (err error)
//sys	Getdents(fd int, buf []byte) (n int, err error)
//sys	Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error)
//sys	Getdtablesize() (size int)
//sysnb	Getegid() (egid int)
//sysnb	Geteuid() (uid int)

	SYS_ISSETUGID                = 253 // { int issetugid(void); }
	SYS_LCHOWN                   = 254 // { int lchown(char *path, int uid, int gid); }
	SYS_GETDENTS                 = 272 // { int getdents(int fd, char *buf, \
	SYS_LCHMOD                   = 274 // { int lchmod(char *path, mode_t mode); }
	SYS_LUTIMES                  = 276 // { int lutimes(char *path, \

	SYS_ISSETUGID                = 253 // { int issetugid(void); }
	SYS_LCHOWN                   = 254 // { int lchown(char *path, int uid, int gid); }
	SYS_GETDENTS                 = 272 // { int getdents(int fd, char *buf, \
	SYS_LCHMOD                   = 274 // { int lchmod(char *path, mode_t mode); }
	SYS_LUTIMES                  = 276 // { int lutimes(char *path, \