func run(mountpoint string) error {
c, err := fuse.Mount(
mountpoint,
fuse.FSName("clock"),
fuse.Subtype("clockfsfs"),
fuse.LocalVolume(),
fuse.VolumeName("Clock filesystem"),
)
if err != nil {
return err
}
defer c.Close()
if p := c.Protocol(); !p.HasInvalidate() {
return fmt.Errorf("kernel FUSE support is too old to have invalidations: version %v", p)
}
srv := fs.New(c, nil)
filesys := &FS{
// We pre-create the clock node so that it's always the same
// object returned from all the Lookups. You could carefully
// track its lifetime between Lookup&Forget, and have the
// ticking & invalidation happen only when active, but let's
// keep this example simple.
clockFile: &File{
fuse: srv,
},
}
filesys.clockFile.tick()
// This goroutine never exits. That's fine for this example.
go filesys.clockFile.update()
if err := srv.Serve(filesys); err != nil {
return err
}
// Check if the mount process has an error to report.
<-c.Ready
if err := c.MountError; err != nil {
return err
}
return nil
}
// MountedFunc mounts a filesystem at a temporary directory. The
// filesystem used is constructed by calling a function, to allow
// storing fuse.Conn and fs.Server in the FS.
//
// It also waits until the filesystem is known to be visible (OS X
// workaround).
//
// After successful return, caller must clean up by calling Close.
func MountedFunc(fn func(*Mount) fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
dir, err := ioutil.TempDir("", "fusetest")
if err != nil {
return nil, err
}
c, err := fuse.Mount(dir, options...)
if err != nil {
return nil, err
}
server := fs.New(c, conf)
done := make(chan struct{})
serveErr := make(chan error, 1)
mnt := &Mount{
Dir: dir,
Conn: c,
Server: server,
Error: serveErr,
done: done,
}
filesys := fn(mnt)
go func() {
defer close(done)
serveErr <- server.Serve(filesys)
}()
select {
case <-mnt.Conn.Ready:
if err := mnt.Conn.MountError; err != nil {
return nil, err
}
return mnt, nil
case err = <-mnt.Error:
// Serve quit early
if err != nil {
return nil, err
}
return nil, errors.New("Serve exited early")
}
}