// The contents of this file are not relevant for test caching.
func openDirAt(dirfd int, name string) (*File, error) {
	var r int
	for {
		var e error
		r, e = unix.Openat(dirfd, name, O_RDONLY|syscall.O_CLOEXEC|syscall.O_DIRECTORY|syscall.O_NOFOLLOW, 0)
		if e == nil {
			break
		}

		// See comment in openFileNolog.
		if e == syscall.EINTR {
			continue
		}

		return nil, e
	}

		}
	}

	var (
		r int
		s poll.SysFile
		e error
	)
	// We have to check EINTR here, per issues 11180 and 39237.
	ignoringEINTR(func() error {
		r, s, e = open(name, flag|syscall.O_CLOEXEC, syscallMode(perm))
		return e
	})
	if e != nil {
		return nil, &PathError{Op: "open", Path: name, Err: e}
	}

	// open(2) itself won't handle the sticky bit on *BSD and Solaris
	if setSticky {

		_, _, err1 = RawSyscall(SYS_DUP3, uintptr(pipe), uintptr(nextfd), O_CLOEXEC)
		if err1 != 0 {
			goto childerror
		}
		pipe = nextfd
		nextfd++
	}
	for i = 0; i < len(fd); i++ {
		if fd[i] >= 0 && fd[i] < i {
			if nextfd == pipe { // don't stomp on pipe
				nextfd++
			}
			_, _, err1 = RawSyscall(SYS_DUP3, uintptr(fd[i]), uintptr(nextfd), O_CLOEXEC)
			if err1 != 0 {
				goto childerror
			}

	OTPLOCK                          = 0x800c4d10
	OTPSELECT                        = 0x80044d0d
	O_APPEND                         = 0x400
	O_ASYNC                          = 0x2000
	O_CLOEXEC                        = 0x80000
	O_CREAT                          = 0x40
	O_DIRECT                         = 0x10000
	O_DIRECTORY                      = 0x4000
	O_DSYNC                          = 0x1000

	OTPLOCK                          = 0x800c4d10
	OTPSELECT                        = 0x80044d0d
	O_APPEND                         = 0x400
	O_ASYNC                          = 0x2000
	O_CLOEXEC                        = 0x80000
	O_CREAT                          = 0x40
	O_DIRECT                         = 0x4000
	O_DIRECTORY                      = 0x10000
	O_DSYNC                          = 0x1000

	OTPLOCK                          = 0x800c4d10
	OTPSELECT                        = 0x80044d0d
	O_APPEND                         = 0x400
	O_ASYNC                          = 0x2000
	O_CLOEXEC                        = 0x80000
	O_CREAT                          = 0x40
	O_DIRECT                         = 0x4000
	O_DIRECTORY                      = 0x10000
	O_DSYNC                          = 0x1000

	ONOCR                         = 0x10
	OPENFAIL                      = -0x1
	OPOST                         = 0x1
	O_ACCMODE                     = 0x600003
	O_APPEND                      = 0x8
	O_CLOEXEC                     = 0x800000
	O_CREAT                       = 0x100
	O_DIRECTORY                   = 0x1000000
	O_DSYNC                       = 0x40
	O_EXCL                        = 0x400