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https://github.com/aligator/gofat
FAT filesystem implementation in pure Go compatible with afero.Fs and Go 1.16 fs.FS
https://github.com/aligator/gofat
afero fat fat32 filesystem fs go golang vfat
Last synced: about 1 month ago
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FAT filesystem implementation in pure Go compatible with afero.Fs and Go 1.16 fs.FS
- Host: GitHub
- URL: https://github.com/aligator/gofat
- Owner: aligator
- License: mit
- Created: 2020-12-21T17:15:44.000Z (about 4 years ago)
- Default Branch: main
- Last Pushed: 2021-03-23T12:01:53.000Z (almost 4 years ago)
- Last Synced: 2024-07-02T15:11:52.667Z (6 months ago)
- Topics: afero, fat, fat32, filesystem, fs, go, golang, vfat
- Language: Go
- Homepage:
- Size: 275 KB
- Stars: 6
- Watchers: 3
- Forks: 1
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
[](https://github.com/aligator/gofat/actions)  [](https://codecov.io/gh/aligator/GoFAT)
# GoFAT
A FAT filesystem implementation in pure Go.
It implements the interface of [afero](https://github.com/spf13/afero).
## Current Status
Readonly File access works great. Write support is missing, yet.
## Usage
```go
package main
import (
"fmt"
"io"
"os"
"github.com/aligator/gofat"
"github.com/spf13/afero"
)
func main() {
// Get any io.ReadSeeker implementation which provides a reader to a FAT32 filesystem.
// You can use for example os.Open(...) to open an image file or even a `/dev/sdxy` device file from linux.
var reader io.ReadSeeker = ...
// Then create a new GoFAT filesystem from the reader.
fat, err := gofat.New(reader)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
// Now you can access any method from the afero.Fs filesystem like for example afero.Walk.
_ := afero.Walk(fat, "/", func(path string, info os.FileInfo, err error) error {
if err != nil {
fmt.Println(err)
return err
}
fmt.Println(path, info.IsDir())
return nil
})
// You can also access some FAT specific fields.
fmt.Printf("Opened volume '%v' with type %v\n\n", fat.Label(), fat.FSType())
}
```
That's it!
## Compatibility with Go 1.16
As the Go 1.16 fs.FS interface is not fully compatible with the afero.Fs interface, it cannot be used with that directly.
But I added a simple wrapper around it.
You can either just wrap an existing fat fs:
```go
gofs := GoFs{*fs}
```
Or directly create a new one using `NewGoFS(...)` or `NewGoFSSkipChecks(...)`.
Note that this wrapper has a small overhead, especially ReadDir because the result has to be converted to `[]fs.DirEntry`.
I also added `testing.fstest` to the unit tests.
## Test images
To get access to some test-images which already contain a FAT filesystem just run
```bash
go generate
```
This will extract the test images into `./testdata`.
## Contribution
Contributions are welcome, just create issues or even better PRs. You may open a draft or issue first to discuss the
changes you would like to implement.
You may use github.com/cweill/gotests to generate your test boilerplate code.
Some resources on how FAT works are:
* https://en.wikipedia.org/wiki/Design_of_the_FAT_file_system
* https://wiki.osdev.org/FAT
* https://github.com/ryansturmer/thinfat32
* https://github.com/ryansturmer/thinfat32/blob/master/fatgen103.pdf
## ToDo
* more tests
* implement some more attributes (e.g. hidden)
* implement write support
* support FAT12
* check if compatibility with TinyGo for microcontrollers is possible. That would be a good use case for this lib...
* use for a fuse filesystem driver