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FCLOSEALL(3)               Linux Programmer's Manual              FCLOSEALL(3)
NAME
       fcloseall - close all open streams
SYNOPSIS
       #define _GNU_SOURCE         /* See feature_test_macros(7) */
       #include <stdio.h>
       int fcloseall(void);
DESCRIPTION
       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.
RETURN VALUE
       This  function  returns  0  if  all  files were successfully closed; on
       error, EOF is returned.
ATTRIBUTES
       For  an  explanation  of  the  terms  used   in   this   section,   see
       attributes(7).
       +------------+---------------+------------------------+
       |Interface   | Attribute     | Value                  |
       +------------+---------------+------------------------+
       |fcloseall() | Thread safety | MT-Unsafe race:streams |
       +------------+---------------+------------------------+
       The  fcloseall()  function  does  not  lock  the  streams, so it is not
       thread-safe.
CONFORMING TO
       This function is a GNU extension.
SEE ALSO
       close(2), fclose(3), fflush(3), fopen(3), setbuf(3)
COLOPHON
       This page is part of release 4.15 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/.
GNU                               2017-09-15                      FCLOSEALL(3)