| POSIX_FADVISE(2) | System Calls Manual | POSIX_FADVISE(2) | 
posix_fadvise —
#include <fcntl.h>
int
  
  posix_fadvise(int
    fd, off_t offset,
    off_t size,
    int hint);
posix_fadvise() hints at the application's access
  pattern to the file and range given by the file descriptor,
  fd, and offset and
  size. If size is zero, it means to
  the end of file.
hint should be one of the following:
Calling posix_fadvise() doesn't alter the
    semantics of the operations, it is only a matter of performance.
posix_fadvise() returns 0. Otherwise, it
  returns an error number.
POSIX_FADV_NORMAL,
  POSIX_FADV_RANDOM, and
  POSIX_FADV_SEQUENTIAL, the current implementation
  ignores offset and size, and
  applies the hint to the whole file.
| February 4, 2013 | NetBSD 10.0 |