Provided by: linux-doc-2.6.15_2.6.15-23.39_all
seq_open - initialize sequential file
int seq_open (struct file * file, struct seq_operations * op);
file file we initialize
op method table describing the sequence
seq_open sets file, associating it with a sequence described by op.
op->start sets the iterator up and returns the first element of
sequence. op->stop shuts it down. op->next returns the next element of
sequence. op->show prints element into the buffer. In case of error
->start and ->next return ERR_PTR(error). In the end of sequence they
return NULL. ->show returns 0 in case of success and negative number in
case of error.