github.com/intel/goresctrl@v0.5.0/pkg/cgroups/fsios.go (about)

     1  // Copyright 2021 Intel Corporation. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // This module provides the native implementation of the filesystem
    16  // interface (fsi).
    17  
    18  package cgroups
    19  
    20  import (
    21  	"os"
    22  	"path/filepath"
    23  )
    24  
    25  type fsOs struct{}
    26  
    27  type osFile struct {
    28  	file *os.File
    29  }
    30  
    31  func newFsiOS() fsiIface {
    32  	return fsOs{}
    33  }
    34  
    35  func (fsOs) OpenFile(name string, flag int, perm os.FileMode) (fileIface, error) {
    36  	f, err := os.OpenFile(name, flag, perm)
    37  	return osFile{f}, err
    38  }
    39  
    40  func (fsOs) Open(name string) (fileIface, error) {
    41  	f, err := os.Open(name)
    42  	return osFile{f}, err
    43  }
    44  
    45  func (fsOs) Lstat(name string) (os.FileInfo, error) {
    46  	return os.Lstat(name)
    47  }
    48  
    49  func (fsOs) Walk(root string, walkFn filepath.WalkFunc) error {
    50  	return filepath.Walk(root, walkFn)
    51  }
    52  
    53  func (osf osFile) Write(b []byte) (n int, err error) {
    54  	return osf.file.Write(b)
    55  }
    56  
    57  func (osf osFile) Read(b []byte) (n int, err error) {
    58  	return osf.file.Read(b)
    59  }
    60  
    61  func (osf osFile) Close() error {
    62  	return osf.file.Close()
    63  }