fcloseall(3) Library Functions Manual fcloseall(3) NAME fcloseall - close all open streams LIBRARY Standard C library (libc, -lc) 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 er- ror, EOF is returned. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(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. STANDARDS This function is a GNU extension. SEE ALSO close(2), fclose(3), fflush(3), fopen(3), setbuf(3) Linux man-pages 6.03 2022-12-15 fcloseall(3)
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