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hello.go
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hello.go
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// Hellofs implements a simple "hello world" file system.
package main
import (
"flag"
"fmt"
"log"
"os"
"github.com/ipfs/go-ipfs/Godeps/_workspace/src/bazil.org/fuse"
"github.com/ipfs/go-ipfs/Godeps/_workspace/src/bazil.org/fuse/fs"
_ "github.com/ipfs/go-ipfs/Godeps/_workspace/src/bazil.org/fuse/fs/fstestutil"
"github.com/ipfs/go-ipfs/Godeps/_workspace/src/golang.org/x/net/context"
)
var Usage = func() {
fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
fmt.Fprintf(os.Stderr, " %s MOUNTPOINT\n", os.Args[0])
flag.PrintDefaults()
}
func main() {
flag.Usage = Usage
flag.Parse()
if flag.NArg() != 1 {
Usage()
os.Exit(2)
}
mountpoint := flag.Arg(0)
c, err := fuse.Mount(
mountpoint,
fuse.FSName("helloworld"),
fuse.Subtype("hellofs"),
fuse.LocalVolume(),
fuse.VolumeName("Hello world!"),
)
if err != nil {
log.Fatal(err)
}
defer c.Close()
err = fs.Serve(c, FS{})
if err != nil {
log.Fatal(err)
}
// check if the mount process has an error to report
<-c.Ready
if err := c.MountError; err != nil {
log.Fatal(err)
}
}
// FS implements the hello world file system.
type FS struct{}
func (FS) Root() (fs.Node, error) {
return Dir{}, nil
}
// Dir implements both Node and Handle for the root directory.
type Dir struct{}
func (Dir) Attr() fuse.Attr {
return fuse.Attr{Inode: 1, Mode: os.ModeDir | 0555}
}
func (Dir) Lookup(ctx context.Context, name string) (fs.Node, error) {
if name == "hello" {
return File{}, nil
}
return nil, fuse.ENOENT
}
var dirDirs = []fuse.Dirent{
{Inode: 2, Name: "hello", Type: fuse.DT_File},
}
func (Dir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
return dirDirs, nil
}
// File implements both Node and Handle for the hello file.
type File struct{}
const greeting = "hello, world\n"
func (File) Attr() fuse.Attr {
return fuse.Attr{Inode: 2, Mode: 0444, Size: uint64(len(greeting))}
}
func (File) ReadAll(ctx context.Context) ([]byte, error) {
return []byte(greeting), nil
}