func makeFlushFS() (server fuse.Server, err error) {
// Check the flags.
if *fFlushesFile == 0 || *fFsyncsFile == 0 {
err = fmt.Errorf("You must set the flushfs flags.")
return
}
// Set up the files.
flushes := os.NewFile(uintptr(*fFlushesFile), "(flushes file)")
fsyncs := os.NewFile(uintptr(*fFsyncsFile), "(fsyncs file)")
// Set up errors.
var flushErr error
var fsyncErr error
if *fFlushError != 0 {
flushErr = bazilfuse.Errno(*fFlushError)
}
if *fFsyncError != 0 {
fsyncErr = bazilfuse.Errno(*fFsyncError)
}
// Report flushes and fsyncs by writing the contents followed by a newline.
report := func(f *os.File, outErr error) func(string) error {
return func(s string) (err error) {
buf := []byte(s)
buf = append(buf, '\n')
_, err = f.Write(buf)
if err != nil {
err = fmt.Errorf("Write: %v", err)
return
}
err = outErr
return
}
}
reportFlush := report(flushes, flushErr)
reportFsync := report(fsyncs, fsyncErr)
// Create the file system.
server, err = flushfs.NewFileSystem(reportFlush, reportFsync)
return
}
func (f *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) {
if !req.Flags.IsReadOnly() {
return nil, fuse.Errno(syscall.EACCES)
}
resp.Flags |= fuse.OpenKeepCache
return f, nil
}
// you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package fuse import ( "syscall" "github.com/jacobsa/bazilfuse" ) const ( // Errors corresponding to kernel error numbers. These may be treated // specially by fuseops.Op.Respond methods. EEXIST = bazilfuse.EEXIST EINVAL = bazilfuse.Errno(syscall.EINVAL) EIO = bazilfuse.EIO ENOENT = bazilfuse.ENOENT ENOSYS = bazilfuse.ENOSYS ENOTDIR = bazilfuse.Errno(syscall.ENOTDIR) ENOTEMPTY = bazilfuse.Errno(syscall.ENOTEMPTY) )