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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | SEE ALSO | COLOPHON |
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fcloseall(3) Library Functions Manual fcloseall(3)
fcloseall - close all open streams
Standard C library (libc, -lc)
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <stdio.h>
int fcloseall(void);
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).
┌───────────────────────┬───────────────┬────────────────────────┐
│ Interface │ Attribute │ Value │
├───────────────────────┼───────────────┼────────────────────────┤
│ fcloseall() │ Thread safety │ MT-Unsafe race:streams │
└───────────────────────┴───────────────┴────────────────────────┘
The fcloseall() function does not lock the streams, so it is not
thread-safe.
GNU.
close(2), fclose(3), fflush(3), fopen(3), setbuf(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
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⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
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Linux man-pages 6.15 2025-05-17 fcloseall(3)
Pages that refer to this page: fclose(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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