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FCLOSE(3) Linux Programmer's Manual FCLOSE(3)
NAME
fclose - close a stream
SYNOPSIS
#include<stdio.h>
intfclose(FILE*stream);
DESCRIPTION
The fclose function dissociates the named stream from its underlying
file or set of functions. If the stream was being used for output, any
buffered data is written first, using fflush(3).
RETURNVALUE
Upon successful completion 0 is returned. Otherwise, EOF is returned
and the global variable errno is set to indicate the error. In either
case any further access (including another call to fclose()) to the
stream results in undefined behaviour.
ERRORS
EBADF The filedescriptor underlying stream is not valid.
The fclose function may also fail and set errno for any of the errors
specified for the routines close(2), write(2) or fflush(3).
NOTES
Note that fclose only flushes the user space buffers provided by the C
library. To ensure that the data is physically stored on disk the ker-
nel buffers must be flushed too, e.g. with sync(2) or fsync(2).
CONFORMINGTO
The fclose function conforms to ANSI X3.159-1989 (''ANSI C'').
SEEALSO
close(2), fcloseall(3), fflush(3), fopen(3), setbuf(3)
BSD MANPAGE 1993-11-29 FCLOSE(3)
Take our 
