forked from google/periph
/
sysfs.go
62 lines (51 loc) · 1.13 KB
/
sysfs.go
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// Copyright 2017 The Periph Authors. All rights reserved.
// Use of this source code is governed under the Apache License, Version 2.0
// that can be found in the LICENSE file.
package sysfs
import (
"io"
"periph.io/x/periph/host/fs"
)
var ioctlOpen = ioctlOpenDefault
func ioctlOpenDefault(path string, flag int) (ioctlCloser, error) {
f, err := fs.Open(path, flag)
if err != nil {
return nil, err
}
return f, nil
}
var fileIOOpen = fileIOOpenDefault
func fileIOOpenDefault(path string, flag int) (fileIO, error) {
f, err := fs.Open(path, flag)
if err != nil {
return nil, err
}
return f, nil
}
type ioctlCloser interface {
io.Closer
fs.Ioctler
}
type fileIO interface {
Fd() uintptr
fs.Ioctler
io.Closer
io.Reader
io.Seeker
io.Writer
}
// seekRead seeks to the beginning of a file and reads it.
func seekRead(f fileIO, b []byte) (int, error) {
if _, err := f.Seek(0, 0); err != nil {
return 0, err
}
return f.Read(b)
}
// seekWrite seeks to the beginning of a file and writes to it.
func seekWrite(f fileIO, b []byte) error {
if _, err := f.Seek(0, 0); err != nil {
return err
}
_, err := f.Write(b)
return err
}