#include <unistd.h> int close(int fn);
close closes a socket or a file opened for UNIX style
I/O. fn is the file descriptor for the file or socket.
When close is called for an HFS file, any record locks for the
file owned by the closing process are released. When the last open
descriptor for a pipe or FIFO file is closed, any remaining data are lost.
Also, when the last open descriptor for a file is closed, if its link
count is now zero, the file is inaccessible and its disk space is released.
For a socket, close indicates that the program is finished using the
socket; close breaks the connection between the socket descriptor
and the socket. The status of undelivered output data is determined by the
SO_LINGER socket option, as defined with the setsockopt
function.
close returns 0 if it is successful or - 1 if it is
unsuccessful. Even if close returns - 1,
any further attempts to use the file descriptor (unless it is reopened)
will fail.
open.
fclose, fsync
Copyright (c) 1998 SAS Institute Inc. Cary, NC, USA. All rights reserved.