// Copyright 2026 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build dragonfly || freebsd || netbsd || (openbsd && mips64)

package unix

import (
	"syscall"
	"unsafe"
)

func Fchmodat(dirfd int, path string, mode uint32, flags int) error {
	p, err := syscall.BytePtrFromString(path)
	if err != nil {
		return err
	}
	_, _, errno := syscall.Syscall6(fchmodatTrap,
		uintptr(dirfd),
		uintptr(unsafe.Pointer(p)),
		uintptr(mode),
		uintptr(flags),
		0, 0)
	if errno != 0 {
		return errno
	}
	return nil
}