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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). βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ¬ββββββββββββββββ¬βββββββββββββββββββββββββ βInterface β Attribute β Value β βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββΌββββββββββββββββΌβββββββββββββββββββββββββ€ βfcloseall() β Thread safety β MT-Unsafe race:streams β βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ΄ββββββββββββββββ΄βββββββββββββββββββββββββ 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) GNU 2021-03-22 FCLOSEALL(3)