83 lines
2.0 KiB
Go
83 lines
2.0 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package fsgofer
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import (
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"syscall"
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"unsafe"
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"gvisor.dev/gvisor/pkg/syserr"
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)
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func utimensat(dirFd int, name string, times [2]syscall.Timespec, flags int) error {
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// utimensat(2) doesn't accept empty name, instead name must be nil to make it
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// operate directly on 'dirFd' unlike other *at syscalls.
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var namePtr unsafe.Pointer
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if name != "" {
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nameBytes, err := syscall.BytePtrFromString(name)
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if err != nil {
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return err
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}
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namePtr = unsafe.Pointer(nameBytes)
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}
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timesPtr := unsafe.Pointer(×[0])
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if _, _, errno := syscall.Syscall6(
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syscall.SYS_UTIMENSAT,
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uintptr(dirFd),
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uintptr(namePtr),
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uintptr(timesPtr),
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uintptr(flags),
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0,
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0); errno != 0 {
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return syserr.FromHost(errno).ToError()
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}
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return nil
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}
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func renameat(oldDirFD int, oldName string, newDirFD int, newName string) error {
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var oldNamePtr unsafe.Pointer
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if oldName != "" {
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nameBytes, err := syscall.BytePtrFromString(oldName)
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if err != nil {
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return err
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}
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oldNamePtr = unsafe.Pointer(nameBytes)
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}
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var newNamePtr unsafe.Pointer
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if newName != "" {
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nameBytes, err := syscall.BytePtrFromString(newName)
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if err != nil {
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return err
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}
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newNamePtr = unsafe.Pointer(nameBytes)
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}
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if _, _, errno := syscall.Syscall6(
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syscall.SYS_RENAMEAT,
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uintptr(oldDirFD),
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uintptr(oldNamePtr),
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uintptr(newDirFD),
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uintptr(newNamePtr),
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0,
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0); errno != 0 {
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return syserr.FromHost(errno).ToError()
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}
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return nil
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}
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