fcloseall - close all open streams
The fcloseall() function closes all of the calling process's open
streams. Buffered output for each stream is written before it is closed (as
for fflush(3)); buffered input is discarded.
The standard streams, stdin, stdout, and
stderr are also closed.
This function returns 0 if all files were successfully closed; on error,
EOF is returned.
For an explanation of the terms used in this section, see attributes(7).
The fcloseall() function does not lock the streams, so it
is not thread-safe.
This function is a GNU extension.
This page is part of release 4.16 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the latest
version of this page, can be found at https://www.kernel.org/doc/man-pages/.