Waits for I/O on a specific file to complete.

    Format

      #include  <stdio.h>

      int lwait  (int fd);

1  –  Argument

 fd

    A file descriptor corresponding to an open file.

2  –  Description

    The lwait function is used primarily to wait for completion of
    pending asynchronous I/O.

3  –  Return Values

    0                  Indicates successful completion.
    -1                 Indicates an error.