// 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() error {
f, err := file.ReadOpen(h.state.Source)
if err != nil {
return fmt.Errorf("Failed opening %s: %s", h.state.Source, err)
}
harvesterOpenFiles.Add(1)
// Makes sure file handler is also closed on errors
err = h.validateFile(f)
if err != nil {
f.Close()
harvesterOpenFiles.Add(-1)
return err
}
h.file = source.File{f}
return 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 encoding encoding.Encoding
f, err := file.ReadOpen(h.Path)
if err == nil {
// Check we are not following a rabbit hole (symlinks, etc.)
if !file.IsRegular(f) {
return nil, errors.New("Given file is not a regular file.")
}
encoding, err = h.encoding(f)
if err != nil {
if err == transform.ErrShortSrc {
logp.Info("Initialising encoding for '%v' failed due to file being too short", f)
} else {
logp.Err("Initialising encoding for '%v' failed: %v", f, err)
}
return nil, err
}
} else {
logp.Err("Failed opening %s: %s", h.Path, err)
return nil, err
}
// update file offset
err = h.initFileOffset(f)
if err != nil {
return nil, err
}
// yay, open file
h.file = source.File{f}
return encoding, nil
}