1FCLOSEALL(3)               Linux Programmer's Manual              FCLOSEALL(3)
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NAME

6       fcloseall - close all open streams
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SYNOPSIS

9       #define _GNU_SOURCE         /* See feature_test_macros(7) */
10       #include <stdio.h>
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12       int fcloseall(void);
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DESCRIPTION

15       The  fcloseall()  function  closes  all  of  the calling process's open
16       streams.  Buffered output for each  stream  is  written  before  it  is
17       closed (as for fflush(3)); buffered input is discarded.
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19       The standard streams, stdin, stdout, and stderr are also closed.
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RETURN VALUE

22       This  function  returns 0 if all files were successfully closed; on er‐
23       ror, EOF is returned.
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ATTRIBUTES

26       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
27       tributes(7).
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29       ┌─────────────────────────────┬───────────────┬────────────────────────┐
30       │Interface                    │ Attribute     │ Value                  │
31       ├─────────────────────────────┼───────────────┼────────────────────────┤
32       │fcloseall()                  │ Thread safety │ MT-Unsafe race:streams │
33       └─────────────────────────────┴───────────────┴────────────────────────┘
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35       The  fcloseall()  function  does  not  lock  the  streams, so it is not
36       thread-safe.
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CONFORMING TO

39       This function is a GNU extension.
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SEE ALSO

42       close(2), fclose(3), fflush(3), fopen(3), setbuf(3)
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COLOPHON

45       This page is part of release 5.12 of the Linux  man-pages  project.   A
46       description  of  the project, information about reporting bugs, and the
47       latest    version    of    this    page,    can     be     found     at
48       https://www.kernel.org/doc/man-pages/.
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52GNU                               2021-03-22                      FCLOSEALL(3)
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