SEQ_OPEN(9)                               The Linux VFS                               SEQ_OPEN(9)



NAME
       seq_open - initialize sequential file

SYNOPSIS
       int seq_open(struct file * file, const struct seq_operations * op);

ARGUMENTS
       file
           file we initialize

       op
           method table describing the sequence

DESCRIPTION
       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. Returning
       SEQ_SKIP means “discard this element and move on”.

NOTE
       seq_open will allocate a struct seq_file and store its pointer in file->private_data. This
       pointer should not be modified.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                               SEQ_OPEN(9)