}

//sys	Fchdir(fd int) (err error)
//sys	Fchmod(fd int, mode uint32) (err error)
//sys	Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) = SYS___FCHMODAT_A
//sys	Fchown(fd int, uid int, gid int) (err error)
//sys	Fchownat(fd int, path string, uid int, gid int, flags int) (err error) = SYS___FCHOWNAT_A
//sys	FcntlInt(fd uintptr, cmd int, arg int) (retval int, err error) = SYS_FCNTL

		return err
	}
	defer fd.decref()
	return syscall.Shutdown(fd.Sysfd, how)
}

// Fchown wraps syscall.Fchown.
func (fd *FD) Fchown(uid, gid int) error {
	if err := fd.incref(); err != nil {
		return err
	}
	defer fd.decref()
	return ignoringEINTR(func() error {
		return syscall.Fchown(fd.Sysfd, uid, gid)
	})
}

// Ftruncate wraps syscall.Ftruncate.
func (fd *FD) Ftruncate(size int64) error {

				checkUidGid(t, f.Name(), int(sys.Uid), gid)
				continue
			}
			t.Fatalf("fchown %s -1 %d: %s", f.Name(), g, err)
		}
		checkUidGid(t, f.Name(), int(sys.Uid), g)

		// change back to gid to test fd.Chown
		if err = f.Chown(-1, gid); err != nil {
			t.Fatalf("fchown %s -1 %d: %s", f.Name(), gid, err)
		}
		checkUidGid(t, f.Name(), int(sys.Uid), gid)
	}
}

//go:build linux && (ppc64 || ppc64le)

package unix

//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
//sys	Fchown(fd int, uid int, gid int) (err error)
//sys	Fstat(fd int, stat *Stat_t) (err error)
//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
//sys	Fstatfs(fd int, buf *Statfs_t) (err error)

//go:build sparc64 && linux

package unix

//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
//sys	Fchown(fd int, uid int, gid int) (err error)
//sys	Fstat(fd int, stat *Stat_t) (err error)
//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
//sys	Fstatfs(fd int, buf *Statfs_t) (err error)

	_SYS_clone3     = 435
	_SYS_faccessat2 = 439
	_SYS_fchmodat2  = 452
)

//sys	Dup2(oldfd int, newfd int) (err error)
//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys	Fchown(fd int, uid int, gid int) (err error)
//sys	Fstat(fd int, stat *Stat_t) (err error)
//sys	fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
//sys	Fstatfs(fd int, buf *Statfs_t) (err error)

	if err := checkPath(path); err != nil {
		return err
	}
	_, err := fsCall("chown", path, uint32(uid), uint32(gid))
	return err
}

func Fchown(fd int, uid, gid int) error {
	_, err := fsCall("fchown", fd, uint32(uid), uint32(gid))
	return err
}

func Lchown(path string, uid, gid int) error {
	if err := checkPath(path); err != nil {
		return err
	}

//go:build amd64 && linux

package unix

//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
//sys	Fchown(fd int, uid int, gid int) (err error)
//sys	Fstat(fd int, stat *Stat_t) (err error)
//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
//sys	Fstatfs(fd int, buf *Statfs_t) (err error)

// 64-bit file system and 32-bit uid calls
// (16-bit uid calls are not always supported in newer kernels)
//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys	Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
//sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64

// license that can be found in the LICENSE file.

//go:build linux && ppc

package unix

import (
	"syscall"
	"unsafe"
)

//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys	Fchown(fd int, uid int, gid int) (err error)
//sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64