func (h *Harvester) openFile() (encoding.Encoding, error) {
var file *os.File
var err error
var encoding encoding.Encoding
// TODO: This is currently end endless retry, should be set to a max?
// retry on failure.
for {
file, err = input.ReadOpen(h.Path)
if err == nil {
// Check we are not following a rabbit hole (symlinks, etc.)
if !input.IsRegularFile(file) {
file.Close()
return nil, errors.New("Given file is not a regular file.")
}
encoding, err = h.encoding(file)
if err == nil {
break
}
file.Close()
if err != transform.ErrShortSrc {
return nil, err
}
logp.Info("Initialising encoding for '%v' failed due to file being to short")
}
logp.Err("Failed opening %s: %s", h.Path, err)
time.Sleep(5 * time.Second)
}
// update file offset
err = h.initFileOffset(file)
if err != nil {
file.Close()
return nil, err
}
// yay, open file
h.file = fileSource{file}
return encoding, nil
}
// openFile opens a file and checks for the encoding. In case the encoding cannot be detected
// or the file cannot be opened because for example of failing read permissions, an error
// is returned and the harvester is closed. The file will be picked up again the next time
// the file system is scanned
func (h *Harvester) openFile() (encoding.Encoding, error) {
var file *os.File
var err error
var encoding encoding.Encoding
file, err = input.ReadOpen(h.Path)
if err == nil {
// Check we are not following a rabbit hole (symlinks, etc.)
if !input.IsRegularFile(file) {
return nil, errors.New("Given file is not a regular file.")
}
encoding, err = h.encoding(file)
if err != nil {
if err == transform.ErrShortSrc {
logp.Info("Initialising encoding for '%v' failed due to file being too short", file)
} else {
logp.Err("Initialising encoding for '%v' failed: %v", file, err)
}
return nil, err
}
} else {
logp.Err("Failed opening %s: %s", h.Path, err)
return nil, err
}
// update file offset
err = h.initFileOffset(file)
if err != nil {
return nil, err
}
// yay, open file
h.file = fileSource{file}
return encoding, nil
}