59 lines
1.8 KiB
Go
59 lines
1.8 KiB
Go
// Copyright 2018 Google Inc.
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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.googlesource.com/gvisor/pkg/abi/linux"
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)
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func statAt(dirFd int, name string) (syscall.Stat_t, error) {
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nameBytes, err := syscall.BytePtrFromString(name)
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if err != nil {
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return syscall.Stat_t{}, extractErrno(err)
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}
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namePtr := uintptr(unsafe.Pointer(nameBytes))
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var stat syscall.Stat_t
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statPtr := uintptr(unsafe.Pointer(&stat))
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if _, _, err := syscall.Syscall6(syscall.SYS_NEWFSTATAT, uintptr(dirFd), namePtr, statPtr, linux.AT_SYMLINK_NOFOLLOW, 0, 0); err != 0 {
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return syscall.Stat_t{}, err
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}
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return stat, nil
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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 uintptr
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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 extractErrno(err)
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}
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namePtr = uintptr(unsafe.Pointer(nameBytes))
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}
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timesPtr := uintptr(unsafe.Pointer(×[0]))
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if _, _, err := syscall.Syscall6(syscall.SYS_UTIMENSAT, uintptr(dirFd), namePtr, timesPtr, uintptr(flags), 0, 0); err != 0 {
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return err
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}
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return nil
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}
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